* ash shell port for busybox
*
* Copyright (c) 1989, 1991, 1993, 1994
- * The Regents of the University of California. All rights reserved.
+ * The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * This version of ash is adapted from the source in Debian's ash 0.3.8-5
- * package.
+ * This version of ash is adapted from the source in Debian's ash 0.3.8-5
+ * package.
+ *
+ * Modified by Erik Andersen <andersee@debian.org> and
+ * Vladimir Oleynik <dzo@simtreas.ru> to be used in busybox
*
- * Modified by Erik Andersen <andersee@debian.org> to be used in busybox.
*
* Original copyright notice is retained at the end of this file.
*/
-#undef _GNU_SOURCE
-#undef ASH_TYPE
+
+/* These defines allow you to adjust the feature set to be compiled
+ * into the ash shell. As a rule, enabling these options will make
+ * ash get bigger... With all of these options off, ash adds about
+ * 60k to busybox on an x86 system.*/
+
+
+/* Enable job control. This allows you to run jobs in the background,
+ * which is great when ash is being used as an interactive shell, but
+ * it completely useless for is all you are doing is running scripts.
+ * This adds about 2.5k on an x86 system. */
+#undef JOBS
+
+/* This enables alias support in ash. If you want to support things
+ * like "alias ls='ls -l'" with ash, enable this. This is only useful
+ * when ash is used as an intractive shell. This adds about 1.5k */
+#define ASH_ALIAS
+
+/* If you need ash to act as a full Posix shell, with full math
+ * support, enable this. This adds a bit over 2k an x86 system. */
+//#undef ASH_MATH_SUPPORT
+#define ASH_MATH_SUPPORT
+
+/* Getopts is used by shell procedures to parse positional parameters.
+ * You probably want to leave this disabled, and use the busybox getopt
+ * applet if you want to do this sort of thing. There are some scripts
+ * out there that use it, so it you need it, enable. Most people will
+ * leave this disabled. This adds 1k on an x86 system. */
#undef ASH_GETOPTS
-#undef ASH_MATH_SUPPORT
+
+/* This allows you to override shell builtins and use whatever is on
+ * the filesystem. This is most useful when ash is acting as a
+ * standalone shell. Adds about 272 bytes. */
+#undef ASH_CMDCMD
+
+
+/* Optimize size vs speed as size */
+#define ASH_OPTIMIZE_FOR_SIZE
+
+/* Enable this to compile in extra debugging noise. When debugging is
+ * on, debugging info will be written to $HOME/trace and a quit signal
+ * will generate a core dump. */
+#undef DEBUG
+
+/* These are here to work with glibc -- Don't change these... */
#undef FNMATCH_BROKEN
#undef GLOB_BROKEN
+#define IFS_BROKEN
#include <assert.h>
+#include <stddef.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
-#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glob.h>
#endif
-#if JOBS
+#ifdef JOBS
#include <termios.h>
-#undef CEOF /* syntax.h redefines this */
#endif
-#include "cmdedit.h"
#include "busybox.h"
-#include "ash.h"
+#include "cmdedit.h"
+
+/*
+ * This file was generated by the mksyntax program.
+ */
+
+/* Syntax classes */
+#define CWORD 0 /* character is nothing special */
+#define CNL 1 /* newline character */
+#define CBACK 2 /* a backslash character */
+#define CSQUOTE 3 /* single quote */
+#define CDQUOTE 4 /* double quote */
+#define CENDQUOTE 5 /* a terminating quote */
+#define CBQUOTE 6 /* backwards single quote */
+#define CVAR 7 /* a dollar sign */
+#define CENDVAR 8 /* a '}' character */
+#define CLP 9 /* a left paren in arithmetic */
+#define CRP 10 /* a right paren in arithmetic */
+#define CENDFILE 11 /* end of file */
+#define CCTL 12 /* like CWORD, except it must be escaped */
+#define CSPCL 13 /* these terminate a word */
+#define CIGN 14 /* character should be ignored */
+
+#define SYNBASE 130
+#define PEOF -130
+
+#define PEOA -129
+
+#define TEOF 0
+#define TNL 1
+#define TREDIR 2
+#define TWORD 3
+#define TASSIGN 4
+#define TSEMI 5
+#define TBACKGND 6
+#define TAND 7
+#define TOR 8
+#define TPIPE 9
+#define TLP 10
+#define TRP 11
+#define TENDCASE 12
+#define TENDBQUOTE 13
+#define TNOT 14
+#define TCASE 15
+#define TDO 16
+#define TDONE 17
+#define TELIF 18
+#define TELSE 19
+#define TESAC 20
+#define TFI 21
+#define TFOR 22
+#define TIF 23
+#define TIN 24
+#define TTHEN 25
+#define TUNTIL 26
+#define TWHILE 27
+#define TBEGIN 28
+#define TEND 29
+
+
+
+/* control characters in argument strings */
+#define CTLESC '\201'
+#define CTLVAR '\202'
+#define CTLENDVAR '\203'
+#define CTLBACKQ '\204'
+#define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */
+/* CTLBACKQ | CTLQUOTE == '\205' */
+#define CTLARI '\206'
+#define CTLENDARI '\207'
+#define CTLQUOTEMARK '\210'
+
+
+#define is_digit(c) ((c)>='0' && (c)<='9')
+#define is_name(c) (((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))
+#define is_in_name(c) (((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalnum((unsigned char) (c))))
+
+/*
+ * is_special(c) evaluates to 1 for c in "!#$*-0123456789?@"; 0 otherwise
+ * (assuming ascii char codes, as the original implementation did)
+ */
+#define is_special(c) \
+ ( (((unsigned int)c) - 33 < 32) \
+ && ((0xc1ff920dUL >> (((unsigned int)c) - 33)) & 1))
+
+#define digit_val(c) ((c) - '0')
#define _DIAGASSERT(x)
-#define ATABSIZE 39
-#define S_DFL 1 /* default signal handling (SIG_DFL) */
-#define S_CATCH 2 /* signal is caught */
-#define S_IGN 3 /* signal is ignored (SIG_IGN) */
-#define S_HARD_IGN 4 /* signal is ignored permenantly */
-#define S_RESET 5 /* temporary - to reset a hard ignored sig */
+#define S_DFL 1 /* default signal handling (SIG_DFL) */
+#define S_CATCH 2 /* signal is caught */
+#define S_IGN 3 /* signal is ignored (SIG_IGN) */
+#define S_HARD_IGN 4 /* signal is ignored permenantly */
+#define S_RESET 5 /* temporary - to reset a hard ignored sig */
-struct alias *atab[ATABSIZE];
+/* variable substitution byte (follows CTLVAR) */
+#define VSTYPE 0x0f /* type of variable substitution */
+#define VSNUL 0x10 /* colon--treat the empty string as unset */
+#define VSQUOTE 0x80 /* inside double quotes--suppress splitting */
-static void setalias __P((char *, char *));
-static struct alias **hashalias __P((const char *));
-static struct alias *freealias __P((struct alias *));
-static struct alias **__lookupalias __P((const char *));
-static char *trap[NSIG]; /* trap handler commands */
-static char sigmode[NSIG - 1]; /* current value of signal */
-static char gotsig[NSIG - 1]; /* indicates specified signal received */
-static int pendingsigs; /* indicates some signal received */
+/* values of VSTYPE field */
+#define VSNORMAL 0x1 /* normal variable: $var or ${var} */
+#define VSMINUS 0x2 /* ${var-text} */
+#define VSPLUS 0x3 /* ${var+text} */
+#define VSQUESTION 0x4 /* ${var?message} */
+#define VSASSIGN 0x5 /* ${var=text} */
+#define VSTRIMLEFT 0x6 /* ${var#pattern} */
+#define VSTRIMLEFTMAX 0x7 /* ${var##pattern} */
+#define VSTRIMRIGHT 0x8 /* ${var%pattern} */
+#define VSTRIMRIGHTMAX 0x9 /* ${var%%pattern} */
+#define VSLENGTH 0xa /* ${#var} */
+/* flags passed to redirect */
+#define REDIR_PUSH 01 /* save previous values of file descriptors */
+#define REDIR_BACKQ 02 /* save the command output to pipe */
-static void
-setalias(name, val)
- char *name, *val;
-{
- struct alias *ap, **app;
+/*
+ * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
+ * so we use _setjmp instead.
+ */
- app = __lookupalias(name);
- ap = *app;
- INTOFF;
- if (ap) {
- if (!(ap->flag & ALIASINUSE)) {
- ckfree(ap->val);
- }
- ap->val = savestr(val);
- ap->flag &= ~ALIASDEAD;
- } else {
- /* not found */
- ap = ckmalloc(sizeof (struct alias));
- ap->name = savestr(name);
- ap->val = savestr(val);
- ap->flag = 0;
- ap->next = 0;
- *app = ap;
- }
- INTON;
-}
+#if defined(BSD)
+#define setjmp(jmploc) _setjmp(jmploc)
+#define longjmp(jmploc, val) _longjmp(jmploc, val)
+#endif
-static int
-unalias(name)
- char *name;
- {
- struct alias **app;
+/*
+ * Most machines require the value returned from malloc to be aligned
+ * in some way. The following macro will get this right on many machines.
+ */
- app = __lookupalias(name);
+#ifndef ALIGN
+union align {
+ int i;
+ char *cp;
+};
- if (*app) {
- INTOFF;
- *app = freealias(*app);
- INTON;
- return (0);
- }
+#define ALIGN(nbytes) (((nbytes) + sizeof(union align) - 1) & ~(sizeof(union align) - 1))
+#endif
- return (1);
-}
+#ifdef BB_LOCALE_SUPPORT
+#include <locale.h>
+static void change_lc_all(const char *value);
+static void change_lc_ctype(const char *value);
+#endif
+
+/*
+ * These macros allow the user to suspend the handling of interrupt signals
+ * over a period of time. This is similar to SIGHOLD to or sigblock, but
+ * much more efficient and portable. (But hacking the kernel is so much
+ * more fun than worrying about efficiency and portability. :-))
+ */
-#ifdef mkinit
-static void rmaliases __P((void));
+static void onint (void);
+static volatile int suppressint;
+static volatile int intpending;
-SHELLPROC {
- rmaliases();
-}
+#define INTOFF suppressint++
+#ifndef ASH_OPTIMIZE_FOR_SIZE
+#define INTON { if (--suppressint == 0 && intpending) onint(); }
+#define FORCEINTON {suppressint = 0; if (intpending) onint();}
+#else
+static void __inton (void);
+static void forceinton (void);
+#define INTON __inton()
+#define FORCEINTON forceinton()
#endif
-static void
-rmaliases() {
- struct alias *ap, **app;
- int i;
+#define CLEAR_PENDING_INT intpending = 0
+#define int_pending() intpending
- INTOFF;
- for (i = 0; i < ATABSIZE; i++) {
- app = &atab[i];
- for (ap = *app; ap; ap = *app) {
- *app = freealias(*app);
- if (ap == *app) {
- app = &ap->next;
- }
- }
- }
- INTON;
-}
-struct alias *
-lookupalias(name, check)
- const char *name;
- int check;
-{
- struct alias *ap = *__lookupalias(name);
+typedef void *pointer;
+#ifndef NULL
+#define NULL (void *)0
+#endif
- if (check && ap && (ap->flag & ALIASINUSE))
- return (NULL);
- return (ap);
-}
+static inline pointer ckmalloc (int sz) { return xmalloc(sz); }
+static inline pointer ckrealloc(void *p, int sz) { return xrealloc(p, sz); }
+static inline char * savestr (const char *s) { return xstrdup(s); }
+static pointer stalloc (int);
+static void stunalloc (pointer);
+static void ungrabstackstr (char *, char *);
+static char * growstackstr(void);
+static char * makestrspace(size_t newlen);
+static char *sstrdup (const char *);
/*
- * TODO - sort output
+ * Parse trees for commands are allocated in lifo order, so we use a stack
+ * to make this more efficient, and also to avoid all sorts of exception
+ * handling code to handle interrupts in the middle of a parse.
+ *
+ * The size 504 was chosen because the Ultrix malloc handles that size
+ * well.
*/
-static int
-aliascmd(argc, argv)
- int argc;
- char **argv;
-{
- char *n, *v;
- int ret = 0;
- struct alias *ap;
- if (argc == 1) {
- int i;
+#define MINSIZE 504 /* minimum size of a block */
- for (i = 0; i < ATABSIZE; i++)
- for (ap = atab[i]; ap; ap = ap->next) {
- printalias(ap);
- }
- return (0);
- }
- while ((n = *++argv) != NULL) {
- if ((v = strchr(n+1, '=')) == NULL) { /* n+1: funny ksh stuff */
- if ((ap = *__lookupalias(n)) == NULL) {
- outfmt(out2, "%s: %s not found\n", "alias", n);
- ret = 1;
- } else
- printalias(ap);
- }
- else {
- *v++ = '\0';
- setalias(n, v);
- }
- }
- return (ret);
-}
+struct stack_block {
+ struct stack_block *prev;
+ char space[MINSIZE];
+};
-static int
-unaliascmd(argc, argv)
- int argc;
- char **argv;
-{
- int i;
+static struct stack_block stackbase;
+static struct stack_block *stackp = &stackbase;
+static struct stackmark *markp;
+static char *stacknxt = stackbase.space;
+static int stacknleft = MINSIZE;
- while ((i = nextopt("a")) != '\0') {
- if (i == 'a') {
- rmaliases();
- return (0);
- }
- }
- for (i = 0; *argptr; argptr++) {
- if (unalias(*argptr)) {
- outfmt(out2, "%s: %s not found\n", "unalias", *argptr);
- i = 1;
- }
- }
- return (i);
-}
+#define equal(s1, s2) (strcmp(s1, s2) == 0)
-static struct alias **
-hashalias(p)
- const char *p;
- {
- unsigned int hashval;
+#define stackblock() stacknxt
+#define stackblocksize() stacknleft
+#define STARTSTACKSTR(p) p = stackblock(), sstrnleft = stackblocksize()
- hashval = *p << 4;
- while (*p)
- hashval+= *p++;
- return &atab[hashval % ATABSIZE];
-}
+#define STPUTC(c, p) (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
+#define CHECKSTRSPACE(n, p) { if (sstrnleft < n) p = makestrspace(n); }
+#define STACKSTRNUL(p) (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
-static struct alias *
-freealias(struct alias *ap) {
- struct alias *next;
- if (ap->flag & ALIASINUSE) {
- ap->flag |= ALIASDEAD;
- return ap;
- }
+#define USTPUTC(c, p) (--sstrnleft, *p++ = (c))
+#define STUNPUTC(p) (++sstrnleft, --p)
+#define STTOPC(p) p[-1]
+#define STADJUST(amount, p) (p += (amount), sstrnleft -= (amount))
+#define grabstackstr(p) stalloc(stackblocksize() - sstrnleft)
- next = ap->next;
- ckfree(ap->name);
- ckfree(ap->val);
- ckfree(ap);
- return next;
-}
+#define ckfree(p) free((pointer)(p))
-static void
-printalias(const struct alias *ap) {
- char *p;
- p = single_quote(ap->val);
- out1fmt("alias %s=%s\n", ap->name, p);
- stunalloc(p);
-}
+#ifdef DEBUG
+#define TRACE(param) trace param
+static void trace (const char *, ...);
+static void trargs (char **);
+static void showtree (union node *);
+static void trputc (int);
+static void trputs (const char *);
+static void opentrace (void);
+#else
+#define TRACE(param)
+#endif
+
+#define NSEMI 0
+#define NCMD 1
+#define NPIPE 2
+#define NREDIR 3
+#define NBACKGND 4
+#define NSUBSHELL 5
+#define NAND 6
+#define NOR 7
+#define NIF 8
+#define NWHILE 9
+#define NUNTIL 10
+#define NFOR 11
+#define NCASE 12
+#define NCLIST 13
+#define NDEFUN 14
+#define NARG 15
+#define NTO 16
+#define NFROM 17
+#define NFROMTO 18
+#define NAPPEND 19
+#define NTOOV 20
+#define NTOFD 21
+#define NFROMFD 22
+#define NHERE 23
+#define NXHERE 24
+#define NNOT 25
+
+/*
+ * expandarg() flags
+ */
+#define EXP_FULL 0x1 /* perform word splitting & file globbing */
+#define EXP_TILDE 0x2 /* do normal tilde expansion */
+#define EXP_VARTILDE 0x4 /* expand tildes in an assignment */
+#define EXP_REDIR 0x8 /* file glob for a redirection (1 match only) */
+#define EXP_CASE 0x10 /* keeps quotes around for CASE pattern */
+#define EXP_RECORD 0x20 /* need to record arguments for ifs breakup */
+
+
+#define NOPTS 16
+
+static char optet_vals[NOPTS];
+
+static const char * const optlist[NOPTS] = {
+ "e" "errexit",
+ "f" "noglob",
+ "I" "ignoreeof",
+ "i" "interactive",
+ "m" "monitor",
+ "n" "noexec",
+ "s" "stdin",
+ "x" "xtrace",
+ "v" "verbose",
+ "V" "vi",
+ "E" "emacs",
+ "C" "noclobber",
+ "a" "allexport",
+ "b" "notify",
+ "u" "nounset",
+ "q" "quietprofile"
+};
-static struct alias **
-__lookupalias(const char *name) {
- struct alias **app = hashalias(name);
+#define optent_name(optent) (optent+1)
+#define optent_letter(optent) optent[0]
+#define optent_val(optent) optet_vals[optent]
+
+#define eflag optent_val(0)
+#define fflag optent_val(1)
+#define Iflag optent_val(2)
+#define iflag optent_val(3)
+#define mflag optent_val(4)
+#define nflag optent_val(5)
+#define sflag optent_val(6)
+#define xflag optent_val(7)
+#define vflag optent_val(8)
+#define Vflag optent_val(9)
+#define Eflag optent_val(10)
+#define Cflag optent_val(11)
+#define aflag optent_val(12)
+#define bflag optent_val(13)
+#define uflag optent_val(14)
+#define qflag optent_val(15)
+
+
+/* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
+#define FORK_FG 0
+#define FORK_BG 1
+#define FORK_NOJOB 2
+
+
+struct nbinary {
+ int type;
+ union node *ch1;
+ union node *ch2;
+};
- for (; *app; app = &(*app)->next) {
- if (equal(name, (*app)->name)) {
- break;
- }
- }
- return app;
-}
+struct ncmd {
+ int type;
+ int backgnd;
+ union node *assign;
+ union node *args;
+ union node *redirect;
+};
-#ifdef ASH_MATH_SUPPORT
-/* The generated file arith.c has been snipped. If you want this
- * stuff back in, feel free to add it to your own copy. */
-#endif
-/*
- * This file was generated by the mkbuiltins program.
- */
+struct npipe {
+ int type;
+ int backgnd;
+ struct nodelist *cmdlist;
+};
-static int bgcmd __P((int, char **));
-static int breakcmd __P((int, char **));
-static int cdcmd __P((int, char **));
-static int commandcmd __P((int, char **));
-static int dotcmd __P((int, char **));
-static int evalcmd __P((int, char **));
-static int execcmd __P((int, char **));
-static int exitcmd __P((int, char **));
-static int exportcmd __P((int, char **));
-static int histcmd __P((int, char **));
-static int fgcmd __P((int, char **));
-static int hashcmd __P((int, char **));
-static int jobscmd __P((int, char **));
-static int killcmd __P((int, char **));
-static int localcmd __P((int, char **));
-static int pwdcmd __P((int, char **));
-static int readcmd __P((int, char **));
-static int returncmd __P((int, char **));
-static int setcmd __P((int, char **));
-static int setvarcmd __P((int, char **));
-static int shiftcmd __P((int, char **));
-static int trapcmd __P((int, char **));
-static int umaskcmd __P((int, char **));
-static int unaliascmd __P((int, char **));
-static int unsetcmd __P((int, char **));
-static int waitcmd __P((int, char **));
-static int aliascmd __P((int, char **));
-static int ulimitcmd __P((int, char **));
-static int timescmd __P((int, char **));
-#ifdef ASH_MATH_SUPPORT
-static int expcmd __P((int, char **));
-#endif
-#ifdef ASH_TYPE
-static int typecmd __P((int, char **));
-#endif
-#ifdef ASH_GETOPTS
-static int getoptscmd __P((int, char **));
-#endif
-#ifndef BB_TRUE_FALSE
-static int true_main __P((int, char **));
-static int false_main __P((int, char **));
-#endif
-static struct builtincmd *DOTCMD;
-static struct builtincmd *BLTINCMD;
-static struct builtincmd *COMMANDCMD;
-static struct builtincmd *EXECCMD;
-static struct builtincmd *EVALCMD;
+struct nredir {
+ int type;
+ union node *n;
+ union node *redirect;
+};
-/* It is CRUCIAL that this listing be kept in ascii order, otherwise
- * the binary search in find_builtin() will stop working. If you value
- * your kneecaps, you'll be sure to *make sure* that any changes made
- * to this array result in the listing remaining in ascii order. You
- * have been warned.
- */
-static const struct builtincmd builtincmds[] = {
- { ".", dotcmd, 1 },
- { ":", true_main, 1 },
- { "alias", aliascmd, 6 },
- { "bg", bgcmd, 2 },
- { "break", breakcmd, 1 },
- { "builtin", bltincmd, 1 },
- { "cd", cdcmd, 2 },
- { "chdir", cdcmd, 0 },
- { "command", commandcmd, 2 },
- { "continue", breakcmd, 1 },
- { "eval", evalcmd, 1 },
- { "exec", execcmd, 1 },
- { "exit", exitcmd, 1 },
-#ifdef ASH_MATH_SUPPORT
- { "exp", expcmd, 0 },
-#endif
- { "export", exportcmd, 5 },
- { "false", false_main, 2 },
- { "fc", histcmd, 2 },
- { "fg", fgcmd, 2 },
-#ifdef ASH_GETOPTS
- { "getopts", getoptscmd, 2 },
-#endif
- { "hash", hashcmd, 0 },
- { "jobs", jobscmd, 2 },
- { "kill", killcmd, 2 },
-#ifdef ASH_MATH_SUPPORT
- { "let", expcmd, 0 },
-#endif
- { "local", localcmd, 4 },
- { "pwd", pwdcmd, 0 },
- { "read", readcmd, 2 },
- { "readonly", exportcmd, 5 },
- { "return", returncmd, 1 },
- { "set", setcmd, 1 },
- { "setvar", setvarcmd, 0 },
- { "shift", shiftcmd, 1 },
- { "times", timescmd, 1 },
- { "trap", trapcmd, 1 },
- { "true", true_main, 2 },
-#ifdef ASH_TYPE
- { "type", typecmd, 0 },
-#endif
- { "ulimit", ulimitcmd, 0 },
- { "umask", umaskcmd, 2 },
- { "unalias", unaliascmd, 2 },
- { "unset", unsetcmd, 1 },
- { "wait", waitcmd, 2 },
+
+struct nif {
+ int type;
+ union node *test;
+ union node *ifpart;
+ union node *elsepart;
};
-#define NUMBUILTINS (sizeof (builtincmds) / sizeof (struct builtincmd) )
-/* $NetBSD: cd.c,v 1.27 1999/07/09 03:05:49 christos Exp $ */
+struct nfor {
+ int type;
+ union node *args;
+ union node *body;
+ char *var;
+};
-static int docd __P((char *, int));
-static char *getcomponent __P((void));
-static void updatepwd __P((char *));
-static void getpwd __P((void));
-static char *curdir = nullstr; /* current working directory */
-static char *cdcomppath;
+struct ncase {
+ int type;
+ union node *expr;
+ union node *cases;
+};
-#ifdef mkinit
-INCLUDE "cd.h"
-INIT {
- setpwd(0, 0);
-}
-#endif
-static int
-cdcmd(argc, argv)
- int argc;
- char **argv;
-{
- const char *dest;
- const char *path;
- char *p;
- struct stat statb;
- int print = 0;
+struct nclist {
+ int type;
+ union node *next;
+ union node *pattern;
+ union node *body;
+};
- nextopt(nullstr);
- if ((dest = *argptr) == NULL && (dest = bltinlookup("HOME")) == NULL)
- error("HOME not set");
- if (*dest == '\0')
- dest = ".";
- if (dest[0] == '-' && dest[1] == '\0') {
- dest = bltinlookup("OLDPWD");
- if (!dest || !*dest) {
- dest = curdir;
- }
- print = 1;
- if (dest)
- print = 1;
- else
- dest = ".";
- }
- if (*dest == '/' || (path = bltinlookup("CDPATH")) == NULL)
- path = nullstr;
- while ((p = padvance(&path, dest)) != NULL) {
- if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
- if (!print) {
- /*
- * XXX - rethink
- */
- if (p[0] == '.' && p[1] == '/' && p[2] != '\0')
- p += 2;
- print = strcmp(p, dest);
- }
- if (docd(p, print) >= 0)
- return 0;
- }
- }
- error("can't cd to %s", dest);
- /* NOTREACHED */
-}
+struct narg {
+ int type;
+ union node *next;
+ char *text;
+ struct nodelist *backquote;
+};
-/*
- * Actually do the chdir. In an interactive shell, print the
- * directory name if "print" is nonzero.
- */
+struct nfile {
+ int type;
+ union node *next;
+ int fd;
+ union node *fname;
+ char *expfname;
+};
-static int
-docd(dest, print)
- char *dest;
- int print;
-{
- char *p;
- char *q;
- char *component;
- struct stat statb;
- int first;
- int badstat;
- TRACE(("docd(\"%s\", %d) called\n", dest, print));
+struct ndup {
+ int type;
+ union node *next;
+ int fd;
+ int dupfd;
+ union node *vname;
+};
- /*
- * Check each component of the path. If we find a symlink or
- * something we can't stat, clear curdir to force a getcwd()
- * next time we get the value of the current directory.
- */
- badstat = 0;
- cdcomppath = sstrdup(dest);
- STARTSTACKSTR(p);
- if (*dest == '/') {
- STPUTC('/', p);
- cdcomppath++;
- }
- first = 1;
- while ((q = getcomponent()) != NULL) {
- if (q[0] == '\0' || (q[0] == '.' && q[1] == '\0'))
- continue;
- if (! first)
- STPUTC('/', p);
- first = 0;
- component = q;
- while (*q)
- STPUTC(*q++, p);
- if (equal(component, ".."))
- continue;
- STACKSTRNUL(p);
- if ((lstat(stackblock(), &statb) < 0)
- || (S_ISLNK(statb.st_mode))) {
- /* print = 1; */
- badstat = 1;
- break;
- }
- }
- INTOFF;
- if (chdir(dest) < 0) {
- INTON;
- return -1;
- }
- updatepwd(badstat ? NULL : dest);
- INTON;
- if (print && iflag)
- out1fmt(snlfmt, curdir);
- return 0;
-}
+struct nhere {
+ int type;
+ union node *next;
+ int fd;
+ union node *doc;
+};
-/*
- * Get the next component of the path name pointed to by cdcomppath.
- * This routine overwrites the string pointed to by cdcomppath.
- */
+struct nnot {
+ int type;
+ union node *com;
+};
-static char *
-getcomponent() {
- char *p;
- char *start;
- if ((p = cdcomppath) == NULL)
- return NULL;
- start = cdcomppath;
- while (*p != '/' && *p != '\0')
- p++;
- if (*p == '\0') {
- cdcomppath = NULL;
- } else {
- *p++ = '\0';
- cdcomppath = p;
- }
- return start;
-}
+union node {
+ int type;
+ struct nbinary nbinary;
+ struct ncmd ncmd;
+ struct npipe npipe;
+ struct nredir nredir;
+ struct nif nif;
+ struct nfor nfor;
+ struct ncase ncase;
+ struct nclist nclist;
+ struct narg narg;
+ struct nfile nfile;
+ struct ndup ndup;
+ struct nhere nhere;
+ struct nnot nnot;
+};
+
+
+struct nodelist {
+ struct nodelist *next;
+ union node *n;
+};
+
+struct backcmd { /* result of evalbackcmd */
+ int fd; /* file descriptor to read from */
+ char *buf; /* buffer */
+ int nleft; /* number of chars in buffer */
+ struct job *jp; /* job structure for command */
+};
+
+struct cmdentry {
+ int cmdtype;
+ union param {
+ int index;
+ union node *func;
+ const struct builtincmd *cmd;
+ } u;
+};
+
+struct strlist {
+ struct strlist *next;
+ char *text;
+};
+
+
+struct arglist {
+ struct strlist *list;
+ struct strlist **lastp;
+};
+
+struct strpush {
+ struct strpush *prev; /* preceding string on stack */
+ char *prevstring;
+ int prevnleft;
+#ifdef ASH_ALIAS
+ struct alias *ap; /* if push was associated with an alias */
+#endif
+ char *string; /* remember the string since it may change */
+};
+
+struct parsefile {
+ struct parsefile *prev; /* preceding file on stack */
+ int linno; /* current line */
+ int fd; /* file descriptor (or -1 if string) */
+ int nleft; /* number of chars left in this line */
+ int lleft; /* number of chars left in this buffer */
+ char *nextc; /* next char in buffer */
+ char *buf; /* input buffer */
+ struct strpush *strpush; /* for pushing strings at this level */
+ struct strpush basestrpush; /* so pushing one is fast */
+};
+struct stackmark {
+ struct stack_block *stackp;
+ char *stacknxt;
+ int stacknleft;
+ struct stackmark *marknext;
+};
+struct shparam {
+ int nparam; /* # of positional parameters (without $0) */
+ unsigned char malloc; /* if parameter list dynamically allocated */
+ char **p; /* parameter list */
+ int optind; /* next parameter to be processed by getopts */
+ int optoff; /* used by getopts */
+};
/*
- * Update curdir (the name of the current directory) in response to a
- * cd command. We also call hashcd to let the routines in exec.c know
- * that the current directory has changed.
+ * When commands are first encountered, they are entered in a hash table.
+ * This ensures that a full path search will not have to be done for them
+ * on each invocation.
+ *
+ * We should investigate converting to a linear search, even though that
+ * would make the command name "hash" a misnomer.
*/
+#define CMDTABLESIZE 31 /* should be prime */
+#define ARB 1 /* actual size determined at run time */
-static void
-updatepwd(dir)
- char *dir;
- {
- char *new;
- char *p;
- size_t len;
-
- hashcd(); /* update command hash table */
- /*
- * If our argument is NULL, we don't know the current directory
- * any more because we traversed a symbolic link or something
- * we couldn't stat().
- */
- if (dir == NULL || curdir == nullstr) {
- setpwd(0, 1);
- return;
- }
- len = strlen(dir);
- cdcomppath = sstrdup(dir);
- STARTSTACKSTR(new);
- if (*dir != '/') {
- p = curdir;
- while (*p)
- STPUTC(*p++, new);
- if (p[-1] == '/')
- STUNPUTC(new);
- }
- while ((p = getcomponent()) != NULL) {
- if (equal(p, "..")) {
- while (new > stackblock() && (STUNPUTC(new), *new) != '/');
- } else if (*p != '\0' && ! equal(p, ".")) {
- STPUTC('/', new);
- while (*p)
- STPUTC(*p++, new);
- }
- }
- if (new == stackblock())
- STPUTC('/', new);
- STACKSTRNUL(new);
- setpwd(stackblock(), 1);
-}
+struct tblentry {
+ struct tblentry *next; /* next entry in hash chain */
+ union param param; /* definition of builtin function */
+ short cmdtype; /* index identifying command */
+ char rehash; /* if set, cd done since entry created */
+ char cmdname[ARB]; /* name of command */
+};
-static int
-pwdcmd(argc, argv)
- int argc;
- char **argv;
-{
- out1fmt(snlfmt, curdir);
- return 0;
-}
+static struct tblentry *cmdtable[CMDTABLESIZE];
+static int builtinloc = -1; /* index in path of %builtin, or -1 */
+static int exerrno = 0; /* Last exec error */
+static void tryexec (char *, char **, char **);
+static void printentry (struct tblentry *, int);
+static void clearcmdentry (int);
+static struct tblentry *cmdlookup (const char *, int);
+static void delete_cmd_entry (void);
+static int path_change (const char *, int *);
-#define MAXPWD 256
+static void flushall (void);
+static void out2fmt (const char *, ...)
+ __attribute__((__format__(__printf__,1,2)));
+static int xwrite (int, const char *, int);
-/*
- * Find out what the current directory is. If we already know the current
- * directory, this routine returns immediately.
- */
-static void
-getpwd()
-{
- char buf[MAXPWD];
+static inline void outstr (const char *p, FILE *file) { fputs(p, file); }
+static void out1str(const char *p) { outstr(p, stdout); }
+static void out2str(const char *p) { outstr(p, stderr); }
- /*
- * Things are a bit complicated here; we could have just used
- * getcwd, but traditionally getcwd is implemented using popen
- * to /bin/pwd. This creates a problem for us, since we cannot
- * keep track of the job if it is being ran behind our backs.
- * So we re-implement getcwd(), and we suppress interrupts
- * throughout the process. This is not completely safe, since
- * the user can still break out of it by killing the pwd program.
- * We still try to use getcwd for systems that we know have a
- * c implementation of getcwd, that does not open a pipe to
- * /bin/pwd.
- */
-#if defined(__NetBSD__) || defined(__SVR4) || defined(__GLIBC__)
-
- if (getcwd(buf, sizeof(buf)) == NULL) {
- char *pwd = getenv("PWD");
- struct stat stdot, stpwd;
-
- if (pwd && *pwd == '/' && stat(".", &stdot) != -1 &&
- stat(pwd, &stpwd) != -1 &&
- stdot.st_dev == stpwd.st_dev &&
- stdot.st_ino == stpwd.st_ino) {
- curdir = savestr(pwd);
- return;
- }
- error("getcwd() failed: %s", strerror(errno));
- }
- curdir = savestr(buf);
+#ifndef ASH_OPTIMIZE_FOR_SIZE
+#define out2c(c) putc((c), stderr)
#else
- {
- char *p;
- int i;
- int status;
- struct job *jp;
- int pip[2];
-
- if (pipe(pip) < 0)
- error("Pipe call failed");
- jp = makejob((union node *)NULL, 1);
- if (forkshell(jp, (union node *)NULL, FORK_NOJOB) == 0) {
- (void) close(pip[0]);
- if (pip[1] != 1) {
- close(1);
- dup_as_newfd(pip[1], 1);
- close(pip[1]);
- }
- (void) execl("/bin/pwd", "pwd", (char *)0);
- error("Cannot exec /bin/pwd");
- }
- (void) close(pip[1]);
- pip[1] = -1;
- p = buf;
- while ((i = read(pip[0], p, buf + MAXPWD - p)) > 0
- || (i == -1 && errno == EINTR)) {
- if (i > 0)
- p += i;
- }
- (void) close(pip[0]);
- pip[0] = -1;
- status = waitforjob(jp);
- if (status != 0)
- error((char *)0);
- if (i < 0 || p == buf || p[-1] != '\n')
- error("pwd command failed");
- p[-1] = '\0';
- }
- curdir = savestr(buf);
+static void out2c(int c) { putc(c, stderr); }
+#endif
+
+
+#ifdef ASH_OPTIMIZE_FOR_SIZE
+#define USE_SIT_FUNCTION
+#endif
+
+/* number syntax index */
+#define BASESYNTAX 0 /* not in quotes */
+#define DQSYNTAX 1 /* in double quotes */
+#define SQSYNTAX 2 /* in single quotes */
+#define ARISYNTAX 3 /* in arithmetic */
+
+static const char S_I_T[][4] = {
+ /* 0 */ { CSPCL, CIGN, CIGN, CIGN }, /* PEOA */
+ /* 1 */ { CSPCL, CWORD, CWORD, CWORD }, /* ' ' */
+ /* 2 */ { CNL, CNL, CNL, CNL }, /* \n */
+ /* 3 */ { CWORD, CCTL, CCTL, CWORD }, /* !*-/:=?[]~ */
+ /* 4 */ { CDQUOTE, CENDQUOTE, CWORD, CDQUOTE }, /* '"' */
+ /* 5 */ { CVAR, CVAR, CWORD, CVAR }, /* $ */
+ /* 6 */ { CSQUOTE, CWORD, CENDQUOTE, CSQUOTE }, /* "'" */
+ /* 7 */ { CSPCL, CWORD, CWORD, CLP }, /* ( */
+ /* 8 */ { CSPCL, CWORD, CWORD, CRP }, /* ) */
+ /* 9 */ { CBACK, CBACK, CCTL, CBACK }, /* \ */
+ /* 10 */ { CBQUOTE, CBQUOTE, CWORD, CBQUOTE }, /* ` */
+ /* 11 */ { CENDVAR, CENDVAR, CWORD, CENDVAR }, /* } */
+#ifndef USE_SIT_FUNCTION
+ /* 12 */ { CENDFILE, CENDFILE, CENDFILE, CENDFILE }, /* PEOF */
+ /* 13 */ { CWORD, CWORD, CWORD, CWORD }, /* 0-9A-Za-z */
+ /* 14 */ { CCTL, CCTL, CCTL, CCTL } /* CTLESC ... */
#endif
-}
+};
-static void
-setpwd(const char *val, int setold)
+#ifdef USE_SIT_FUNCTION
+
+#define U_C(c) ((unsigned char)(c))
+
+static int SIT(int c, int syntax)
{
- if (setold) {
- setvar("OLDPWD", curdir, VEXPORT);
- }
- INTOFF;
- if (curdir != nullstr) {
- free(curdir);
- curdir = nullstr;
- }
- if (!val) {
- getpwd();
- } else {
- curdir = savestr(val);
- }
- INTON;
- setvar("PWD", curdir, VEXPORT);
+ static const char spec_symbls[]="\t\n !\"$&'()*-/:;<=>?[\\]`|}~";
+ static const char syntax_index_table [] = {
+ 1, 2, 1, 3, 4, 5, 1, 6, /* "\t\n !\"$&'" */
+ 7, 8, 3, 3, 3, 3, 1, 1, /* "()*-/:;<" */
+ 3, 1, 3, 3, 9, 3,10, 1, /* "=>?[\\]`|" */
+ 11,3 }; /* "}~" */
+ const char *s;
+ int indx;
+
+ if(c==PEOF) /* 2^8+2 */
+ return CENDFILE;
+ if(c==PEOA) /* 2^8+1 */
+ indx = 0;
+ else if(U_C(c)>=U_C(CTLESC) && U_C(c)<=U_C(CTLQUOTEMARK))
+ return CCTL;
+ else {
+ s = strchr(spec_symbls, c);
+ if(s==0)
+ return CWORD;
+ indx = syntax_index_table[(s-spec_symbls)];
+ }
+ return S_I_T[indx][syntax];
+}
+
+#else /* USE_SIT_FUNCTION */
+
+#define SIT(c, syntax) S_I_T[(int)syntax_index_table[((int)c)+SYNBASE]][syntax]
+
+#define CSPCL_CIGN_CIGN_CIGN 0
+#define CSPCL_CWORD_CWORD_CWORD 1
+#define CNL_CNL_CNL_CNL 2
+#define CWORD_CCTL_CCTL_CWORD 3
+#define CDQUOTE_CENDQUOTE_CWORD_CDQUOTE 4
+#define CVAR_CVAR_CWORD_CVAR 5
+#define CSQUOTE_CWORD_CENDQUOTE_CSQUOTE 6
+#define CSPCL_CWORD_CWORD_CLP 7
+#define CSPCL_CWORD_CWORD_CRP 8
+#define CBACK_CBACK_CCTL_CBACK 9
+#define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 10
+#define CENDVAR_CENDVAR_CWORD_CENDVAR 11
+#define CENDFILE_CENDFILE_CENDFILE_CENDFILE 12
+#define CWORD_CWORD_CWORD_CWORD 13
+#define CCTL_CCTL_CCTL_CCTL 14
+
+static const char syntax_index_table[258] = {
+ /* BASESYNTAX_DQSYNTAX_SQSYNTAX_ARISYNTAX */
+ /* 0 -130 PEOF */ CENDFILE_CENDFILE_CENDFILE_CENDFILE,
+ /* 1 -129 PEOA */ CSPCL_CIGN_CIGN_CIGN,
+ /* 2 -128 0xff */ CWORD_CWORD_CWORD_CWORD,
+ /* 3 -127 */ CCTL_CCTL_CCTL_CCTL, /* CTLQUOTEMARK */
+ /* 4 -126 */ CCTL_CCTL_CCTL_CCTL,
+ /* 5 -125 */ CCTL_CCTL_CCTL_CCTL,
+ /* 6 -124 */ CCTL_CCTL_CCTL_CCTL,
+ /* 7 -123 */ CCTL_CCTL_CCTL_CCTL,
+ /* 8 -122 */ CCTL_CCTL_CCTL_CCTL,
+ /* 9 -121 */ CCTL_CCTL_CCTL_CCTL,
+ /* 10 -120 */ CCTL_CCTL_CCTL_CCTL, /* CTLESC */
+ /* 11 -119 */ CWORD_CWORD_CWORD_CWORD,
+ /* 12 -118 */ CWORD_CWORD_CWORD_CWORD,
+ /* 13 -117 */ CWORD_CWORD_CWORD_CWORD,
+ /* 14 -116 */ CWORD_CWORD_CWORD_CWORD,
+ /* 15 -115 */ CWORD_CWORD_CWORD_CWORD,
+ /* 16 -114 */ CWORD_CWORD_CWORD_CWORD,
+ /* 17 -113 */ CWORD_CWORD_CWORD_CWORD,
+ /* 18 -112 */ CWORD_CWORD_CWORD_CWORD,
+ /* 19 -111 */ CWORD_CWORD_CWORD_CWORD,
+ /* 20 -110 */ CWORD_CWORD_CWORD_CWORD,
+ /* 21 -109 */ CWORD_CWORD_CWORD_CWORD,
+ /* 22 -108 */ CWORD_CWORD_CWORD_CWORD,
+ /* 23 -107 */ CWORD_CWORD_CWORD_CWORD,
+ /* 24 -106 */ CWORD_CWORD_CWORD_CWORD,
+ /* 25 -105 */ CWORD_CWORD_CWORD_CWORD,
+ /* 26 -104 */ CWORD_CWORD_CWORD_CWORD,
+ /* 27 -103 */ CWORD_CWORD_CWORD_CWORD,
+ /* 28 -102 */ CWORD_CWORD_CWORD_CWORD,
+ /* 29 -101 */ CWORD_CWORD_CWORD_CWORD,
+ /* 30 -100 */ CWORD_CWORD_CWORD_CWORD,
+ /* 31 -99 */ CWORD_CWORD_CWORD_CWORD,
+ /* 32 -98 */ CWORD_CWORD_CWORD_CWORD,
+ /* 33 -97 */ CWORD_CWORD_CWORD_CWORD,
+ /* 34 -96 */ CWORD_CWORD_CWORD_CWORD,
+ /* 35 -95 */ CWORD_CWORD_CWORD_CWORD,
+ /* 36 -94 */ CWORD_CWORD_CWORD_CWORD,
+ /* 37 -93 */ CWORD_CWORD_CWORD_CWORD,
+ /* 38 -92 */ CWORD_CWORD_CWORD_CWORD,
+ /* 39 -91 */ CWORD_CWORD_CWORD_CWORD,
+ /* 40 -90 */ CWORD_CWORD_CWORD_CWORD,
+ /* 41 -89 */ CWORD_CWORD_CWORD_CWORD,
+ /* 42 -88 */ CWORD_CWORD_CWORD_CWORD,
+ /* 43 -87 */ CWORD_CWORD_CWORD_CWORD,
+ /* 44 -86 */ CWORD_CWORD_CWORD_CWORD,
+ /* 45 -85 */ CWORD_CWORD_CWORD_CWORD,
+ /* 46 -84 */ CWORD_CWORD_CWORD_CWORD,
+ /* 47 -83 */ CWORD_CWORD_CWORD_CWORD,
+ /* 48 -82 */ CWORD_CWORD_CWORD_CWORD,
+ /* 49 -81 */ CWORD_CWORD_CWORD_CWORD,
+ /* 50 -80 */ CWORD_CWORD_CWORD_CWORD,
+ /* 51 -79 */ CWORD_CWORD_CWORD_CWORD,
+ /* 52 -78 */ CWORD_CWORD_CWORD_CWORD,
+ /* 53 -77 */ CWORD_CWORD_CWORD_CWORD,
+ /* 54 -76 */ CWORD_CWORD_CWORD_CWORD,
+ /* 55 -75 */ CWORD_CWORD_CWORD_CWORD,
+ /* 56 -74 */ CWORD_CWORD_CWORD_CWORD,
+ /* 57 -73 */ CWORD_CWORD_CWORD_CWORD,
+ /* 58 -72 */ CWORD_CWORD_CWORD_CWORD,
+ /* 59 -71 */ CWORD_CWORD_CWORD_CWORD,
+ /* 60 -70 */ CWORD_CWORD_CWORD_CWORD,
+ /* 61 -69 */ CWORD_CWORD_CWORD_CWORD,
+ /* 62 -68 */ CWORD_CWORD_CWORD_CWORD,
+ /* 63 -67 */ CWORD_CWORD_CWORD_CWORD,
+ /* 64 -66 */ CWORD_CWORD_CWORD_CWORD,
+ /* 65 -65 */ CWORD_CWORD_CWORD_CWORD,
+ /* 66 -64 */ CWORD_CWORD_CWORD_CWORD,
+ /* 67 -63 */ CWORD_CWORD_CWORD_CWORD,
+ /* 68 -62 */ CWORD_CWORD_CWORD_CWORD,
+ /* 69 -61 */ CWORD_CWORD_CWORD_CWORD,
+ /* 70 -60 */ CWORD_CWORD_CWORD_CWORD,
+ /* 71 -59 */ CWORD_CWORD_CWORD_CWORD,
+ /* 72 -58 */ CWORD_CWORD_CWORD_CWORD,
+ /* 73 -57 */ CWORD_CWORD_CWORD_CWORD,
+ /* 74 -56 */ CWORD_CWORD_CWORD_CWORD,
+ /* 75 -55 */ CWORD_CWORD_CWORD_CWORD,
+ /* 76 -54 */ CWORD_CWORD_CWORD_CWORD,
+ /* 77 -53 */ CWORD_CWORD_CWORD_CWORD,
+ /* 78 -52 */ CWORD_CWORD_CWORD_CWORD,
+ /* 79 -51 */ CWORD_CWORD_CWORD_CWORD,
+ /* 80 -50 */ CWORD_CWORD_CWORD_CWORD,
+ /* 81 -49 */ CWORD_CWORD_CWORD_CWORD,
+ /* 82 -48 */ CWORD_CWORD_CWORD_CWORD,
+ /* 83 -47 */ CWORD_CWORD_CWORD_CWORD,
+ /* 84 -46 */ CWORD_CWORD_CWORD_CWORD,
+ /* 85 -45 */ CWORD_CWORD_CWORD_CWORD,
+ /* 86 -44 */ CWORD_CWORD_CWORD_CWORD,
+ /* 87 -43 */ CWORD_CWORD_CWORD_CWORD,
+ /* 88 -42 */ CWORD_CWORD_CWORD_CWORD,
+ /* 89 -41 */ CWORD_CWORD_CWORD_CWORD,
+ /* 90 -40 */ CWORD_CWORD_CWORD_CWORD,
+ /* 91 -39 */ CWORD_CWORD_CWORD_CWORD,
+ /* 92 -38 */ CWORD_CWORD_CWORD_CWORD,
+ /* 93 -37 */ CWORD_CWORD_CWORD_CWORD,
+ /* 94 -36 */ CWORD_CWORD_CWORD_CWORD,
+ /* 95 -35 */ CWORD_CWORD_CWORD_CWORD,
+ /* 96 -34 */ CWORD_CWORD_CWORD_CWORD,
+ /* 97 -33 */ CWORD_CWORD_CWORD_CWORD,
+ /* 98 -32 */ CWORD_CWORD_CWORD_CWORD,
+ /* 99 -31 */ CWORD_CWORD_CWORD_CWORD,
+ /* 100 -30 */ CWORD_CWORD_CWORD_CWORD,
+ /* 101 -29 */ CWORD_CWORD_CWORD_CWORD,
+ /* 102 -28 */ CWORD_CWORD_CWORD_CWORD,
+ /* 103 -27 */ CWORD_CWORD_CWORD_CWORD,
+ /* 104 -26 */ CWORD_CWORD_CWORD_CWORD,
+ /* 105 -25 */ CWORD_CWORD_CWORD_CWORD,
+ /* 106 -24 */ CWORD_CWORD_CWORD_CWORD,
+ /* 107 -23 */ CWORD_CWORD_CWORD_CWORD,
+ /* 108 -22 */ CWORD_CWORD_CWORD_CWORD,
+ /* 109 -21 */ CWORD_CWORD_CWORD_CWORD,
+ /* 110 -20 */ CWORD_CWORD_CWORD_CWORD,
+ /* 111 -19 */ CWORD_CWORD_CWORD_CWORD,
+ /* 112 -18 */ CWORD_CWORD_CWORD_CWORD,
+ /* 113 -17 */ CWORD_CWORD_CWORD_CWORD,
+ /* 114 -16 */ CWORD_CWORD_CWORD_CWORD,
+ /* 115 -15 */ CWORD_CWORD_CWORD_CWORD,
+ /* 116 -14 */ CWORD_CWORD_CWORD_CWORD,
+ /* 117 -13 */ CWORD_CWORD_CWORD_CWORD,
+ /* 118 -12 */ CWORD_CWORD_CWORD_CWORD,
+ /* 119 -11 */ CWORD_CWORD_CWORD_CWORD,
+ /* 120 -10 */ CWORD_CWORD_CWORD_CWORD,
+ /* 121 -9 */ CWORD_CWORD_CWORD_CWORD,
+ /* 122 -8 */ CWORD_CWORD_CWORD_CWORD,
+ /* 123 -7 */ CWORD_CWORD_CWORD_CWORD,
+ /* 124 -6 */ CWORD_CWORD_CWORD_CWORD,
+ /* 125 -5 */ CWORD_CWORD_CWORD_CWORD,
+ /* 126 -4 */ CWORD_CWORD_CWORD_CWORD,
+ /* 127 -3 */ CWORD_CWORD_CWORD_CWORD,
+ /* 128 -2 */ CWORD_CWORD_CWORD_CWORD,
+ /* 129 -1 */ CWORD_CWORD_CWORD_CWORD,
+ /* 130 0 */ CWORD_CWORD_CWORD_CWORD,
+ /* 131 1 */ CWORD_CWORD_CWORD_CWORD,
+ /* 132 2 */ CWORD_CWORD_CWORD_CWORD,
+ /* 133 3 */ CWORD_CWORD_CWORD_CWORD,
+ /* 134 4 */ CWORD_CWORD_CWORD_CWORD,
+ /* 135 5 */ CWORD_CWORD_CWORD_CWORD,
+ /* 136 6 */ CWORD_CWORD_CWORD_CWORD,
+ /* 137 7 */ CWORD_CWORD_CWORD_CWORD,
+ /* 138 8 */ CWORD_CWORD_CWORD_CWORD,
+ /* 139 9 "\t" */ CSPCL_CWORD_CWORD_CWORD,
+ /* 140 10 "\n" */ CNL_CNL_CNL_CNL,
+ /* 141 11 */ CWORD_CWORD_CWORD_CWORD,
+ /* 142 12 */ CWORD_CWORD_CWORD_CWORD,
+ /* 143 13 */ CWORD_CWORD_CWORD_CWORD,
+ /* 144 14 */ CWORD_CWORD_CWORD_CWORD,
+ /* 145 15 */ CWORD_CWORD_CWORD_CWORD,
+ /* 146 16 */ CWORD_CWORD_CWORD_CWORD,
+ /* 147 17 */ CWORD_CWORD_CWORD_CWORD,
+ /* 148 18 */ CWORD_CWORD_CWORD_CWORD,
+ /* 149 19 */ CWORD_CWORD_CWORD_CWORD,
+ /* 150 20 */ CWORD_CWORD_CWORD_CWORD,
+ /* 151 21 */ CWORD_CWORD_CWORD_CWORD,
+ /* 152 22 */ CWORD_CWORD_CWORD_CWORD,
+ /* 153 23 */ CWORD_CWORD_CWORD_CWORD,
+ /* 154 24 */ CWORD_CWORD_CWORD_CWORD,
+ /* 155 25 */ CWORD_CWORD_CWORD_CWORD,
+ /* 156 26 */ CWORD_CWORD_CWORD_CWORD,
+ /* 157 27 */ CWORD_CWORD_CWORD_CWORD,
+ /* 158 28 */ CWORD_CWORD_CWORD_CWORD,
+ /* 159 29 */ CWORD_CWORD_CWORD_CWORD,
+ /* 160 30 */ CWORD_CWORD_CWORD_CWORD,
+ /* 161 31 */ CWORD_CWORD_CWORD_CWORD,
+ /* 162 32 " " */ CSPCL_CWORD_CWORD_CWORD,
+ /* 163 33 "!" */ CWORD_CCTL_CCTL_CWORD,
+ /* 164 34 """ */ CDQUOTE_CENDQUOTE_CWORD_CDQUOTE,
+ /* 165 35 "#" */ CWORD_CWORD_CWORD_CWORD,
+ /* 166 36 "$" */ CVAR_CVAR_CWORD_CVAR,
+ /* 167 37 "%" */ CWORD_CWORD_CWORD_CWORD,
+ /* 168 38 "&" */ CSPCL_CWORD_CWORD_CWORD,
+ /* 169 39 "'" */ CSQUOTE_CWORD_CENDQUOTE_CSQUOTE,
+ /* 170 40 "(" */ CSPCL_CWORD_CWORD_CLP,
+ /* 171 41 ")" */ CSPCL_CWORD_CWORD_CRP,
+ /* 172 42 "*" */ CWORD_CCTL_CCTL_CWORD,
+ /* 173 43 "+" */ CWORD_CWORD_CWORD_CWORD,
+ /* 174 44 "," */ CWORD_CWORD_CWORD_CWORD,
+ /* 175 45 "-" */ CWORD_CCTL_CCTL_CWORD,
+ /* 176 46 "." */ CWORD_CWORD_CWORD_CWORD,
+ /* 177 47 "/" */ CWORD_CCTL_CCTL_CWORD,
+ /* 178 48 "0" */ CWORD_CWORD_CWORD_CWORD,
+ /* 179 49 "1" */ CWORD_CWORD_CWORD_CWORD,
+ /* 180 50 "2" */ CWORD_CWORD_CWORD_CWORD,
+ /* 181 51 "3" */ CWORD_CWORD_CWORD_CWORD,
+ /* 182 52 "4" */ CWORD_CWORD_CWORD_CWORD,
+ /* 183 53 "5" */ CWORD_CWORD_CWORD_CWORD,
+ /* 184 54 "6" */ CWORD_CWORD_CWORD_CWORD,
+ /* 185 55 "7" */ CWORD_CWORD_CWORD_CWORD,
+ /* 186 56 "8" */ CWORD_CWORD_CWORD_CWORD,
+ /* 187 57 "9" */ CWORD_CWORD_CWORD_CWORD,
+ /* 188 58 ":" */ CWORD_CCTL_CCTL_CWORD,
+ /* 189 59 ";" */ CSPCL_CWORD_CWORD_CWORD,
+ /* 190 60 "<" */ CSPCL_CWORD_CWORD_CWORD,
+ /* 191 61 "=" */ CWORD_CCTL_CCTL_CWORD,
+ /* 192 62 ">" */ CSPCL_CWORD_CWORD_CWORD,
+ /* 193 63 "?" */ CWORD_CCTL_CCTL_CWORD,
+ /* 194 64 "@" */ CWORD_CWORD_CWORD_CWORD,
+ /* 195 65 "A" */ CWORD_CWORD_CWORD_CWORD,
+ /* 196 66 "B" */ CWORD_CWORD_CWORD_CWORD,
+ /* 197 67 "C" */ CWORD_CWORD_CWORD_CWORD,
+ /* 198 68 "D" */ CWORD_CWORD_CWORD_CWORD,
+ /* 199 69 "E" */ CWORD_CWORD_CWORD_CWORD,
+ /* 200 70 "F" */ CWORD_CWORD_CWORD_CWORD,
+ /* 201 71 "G" */ CWORD_CWORD_CWORD_CWORD,
+ /* 202 72 "H" */ CWORD_CWORD_CWORD_CWORD,
+ /* 203 73 "I" */ CWORD_CWORD_CWORD_CWORD,
+ /* 204 74 "J" */ CWORD_CWORD_CWORD_CWORD,
+ /* 205 75 "K" */ CWORD_CWORD_CWORD_CWORD,
+ /* 206 76 "L" */ CWORD_CWORD_CWORD_CWORD,
+ /* 207 77 "M" */ CWORD_CWORD_CWORD_CWORD,
+ /* 208 78 "N" */ CWORD_CWORD_CWORD_CWORD,
+ /* 209 79 "O" */ CWORD_CWORD_CWORD_CWORD,
+ /* 210 80 "P" */ CWORD_CWORD_CWORD_CWORD,
+ /* 211 81 "Q" */ CWORD_CWORD_CWORD_CWORD,
+ /* 212 82 "R" */ CWORD_CWORD_CWORD_CWORD,
+ /* 213 83 "S" */ CWORD_CWORD_CWORD_CWORD,
+ /* 214 84 "T" */ CWORD_CWORD_CWORD_CWORD,
+ /* 215 85 "U" */ CWORD_CWORD_CWORD_CWORD,
+ /* 216 86 "V" */ CWORD_CWORD_CWORD_CWORD,
+ /* 217 87 "W" */ CWORD_CWORD_CWORD_CWORD,
+ /* 218 88 "X" */ CWORD_CWORD_CWORD_CWORD,
+ /* 219 89 "Y" */ CWORD_CWORD_CWORD_CWORD,
+ /* 220 90 "Z" */ CWORD_CWORD_CWORD_CWORD,
+ /* 221 91 "[" */ CWORD_CCTL_CCTL_CWORD,
+ /* 222 92 "\" */ CBACK_CBACK_CCTL_CBACK,
+ /* 223 93 "]" */ CWORD_CCTL_CCTL_CWORD,
+ /* 224 94 "^" */ CWORD_CWORD_CWORD_CWORD,
+ /* 225 95 "_" */ CWORD_CWORD_CWORD_CWORD,
+ /* 226 96 "`" */ CBQUOTE_CBQUOTE_CWORD_CBQUOTE,
+ /* 227 97 "a" */ CWORD_CWORD_CWORD_CWORD,
+ /* 228 98 "b" */ CWORD_CWORD_CWORD_CWORD,
+ /* 229 99 "c" */ CWORD_CWORD_CWORD_CWORD,
+ /* 230 100 "d" */ CWORD_CWORD_CWORD_CWORD,
+ /* 231 101 "e" */ CWORD_CWORD_CWORD_CWORD,
+ /* 232 102 "f" */ CWORD_CWORD_CWORD_CWORD,
+ /* 233 103 "g" */ CWORD_CWORD_CWORD_CWORD,
+ /* 234 104 "h" */ CWORD_CWORD_CWORD_CWORD,
+ /* 235 105 "i" */ CWORD_CWORD_CWORD_CWORD,
+ /* 236 106 "j" */ CWORD_CWORD_CWORD_CWORD,
+ /* 237 107 "k" */ CWORD_CWORD_CWORD_CWORD,
+ /* 238 108 "l" */ CWORD_CWORD_CWORD_CWORD,
+ /* 239 109 "m" */ CWORD_CWORD_CWORD_CWORD,
+ /* 240 110 "n" */ CWORD_CWORD_CWORD_CWORD,
+ /* 241 111 "o" */ CWORD_CWORD_CWORD_CWORD,
+ /* 242 112 "p" */ CWORD_CWORD_CWORD_CWORD,
+ /* 243 113 "q" */ CWORD_CWORD_CWORD_CWORD,
+ /* 244 114 "r" */ CWORD_CWORD_CWORD_CWORD,
+ /* 245 115 "s" */ CWORD_CWORD_CWORD_CWORD,
+ /* 246 116 "t" */ CWORD_CWORD_CWORD_CWORD,
+ /* 247 117 "u" */ CWORD_CWORD_CWORD_CWORD,
+ /* 248 118 "v" */ CWORD_CWORD_CWORD_CWORD,
+ /* 249 119 "w" */ CWORD_CWORD_CWORD_CWORD,
+ /* 250 120 "x" */ CWORD_CWORD_CWORD_CWORD,
+ /* 251 121 "y" */ CWORD_CWORD_CWORD_CWORD,
+ /* 252 122 "z" */ CWORD_CWORD_CWORD_CWORD,
+ /* 253 123 "{" */ CWORD_CWORD_CWORD_CWORD,
+ /* 254 124 "|" */ CSPCL_CWORD_CWORD_CWORD,
+ /* 255 125 "}" */ CENDVAR_CENDVAR_CWORD_CENDVAR,
+ /* 256 126 "~" */ CWORD_CCTL_CCTL_CWORD,
+ /* 257 127 */ CWORD_CWORD_CWORD_CWORD,
+};
+
+#endif /* USE_SIT_FUNCTION */
+
+
+/* first char is indicating which tokens mark the end of a list */
+static const char *const tokname_array[] = {
+ "\1end of file",
+ "\0newline",
+ "\0redirection",
+ "\0word",
+ "\0assignment",
+ "\0;",
+ "\0&",
+ "\0&&",
+ "\0||",
+ "\0|",
+ "\0(",
+ "\1)",
+ "\1;;",
+ "\1`",
+#define KWDOFFSET 14
+ /* the following are keywords */
+ "\0!",
+ "\0case",
+ "\1do",
+ "\1done",
+ "\1elif",
+ "\1else",
+ "\1esac",
+ "\1fi",
+ "\0for",
+ "\0if",
+ "\0in",
+ "\1then",
+ "\0until",
+ "\0while",
+ "\0{",
+ "\1}",
+};
+
+static const char *tokname(int tok)
+{
+ static char buf[16];
+
+ if(tok>=TSEMI)
+ buf[0] = '"';
+ sprintf(buf+(tok>=TSEMI), "%s%c",
+ tokname_array[tok]+1, (tok>=TSEMI ? '"' : 0));
+ return buf;
}
-/* $NetBSD: error.c,v 1.23 2000/07/03 03:26:19 matt Exp $ */
+static int plinno = 1; /* input line number */
-/*
- * Errors and exceptions.
- */
+static int parselleft; /* copy of parsefile->lleft */
+
+static struct parsefile basepf; /* top level input file */
+static char basebuf[BUFSIZ]; /* buffer for top level input file */
+static struct parsefile *parsefile = &basepf; /* current input file */
/*
- * Code to handle exceptions in C.
+ * NEOF is returned by parsecmd when it encounters an end of file. It
+ * must be distinct from NULL, so we use the address of a variable that
+ * happens to be handy.
*/
-struct jmploc *handler;
-static int exception;
-volatile int suppressint;
-volatile int intpending;
+static int tokpushback; /* last token pushed back */
+#define NEOF ((union node *)&tokpushback)
+static int checkkwd; /* 1 == check for kwds, 2 == also eat newlines */
-static void exverror __P((int, const char *, va_list))
- __attribute__((__noreturn__));
+static void error (const char *, ...) __attribute__((__noreturn__));
+static void exerror (int, const char *, ...) __attribute__((__noreturn__));
+static void shellexec (char **, char **, const char *, int)
+ __attribute__((noreturn));
+static void exitshell (int) __attribute__((noreturn));
+
+static int goodname(const char *);
+static void ignoresig (int);
+static void onsig (int);
+static void dotrap (void);
+static int decode_signal (const char *, int);
+
+static void shprocvar(void);
+static void deletefuncs(void);
+static void setparam (char **);
+static void freeparam (volatile struct shparam *);
+
+/* reasons for skipping commands (see comment on breakcmd routine) */
+#define SKIPBREAK 1
+#define SKIPCONT 2
+#define SKIPFUNC 3
+#define SKIPFILE 4
+
+/* values of cmdtype */
+#define CMDUNKNOWN -1 /* no entry in table for command */
+#define CMDNORMAL 0 /* command is an executable program */
+#define CMDBUILTIN 1 /* command is a shell builtin */
+#define CMDFUNCTION 2 /* command is a shell function */
+
+#define DO_ERR 1 /* find_command prints errors */
+#define DO_ABS 2 /* find_command checks absolute paths */
+#define DO_NOFUN 4 /* find_command ignores functions */
+#define DO_BRUTE 8 /* find_command ignores hash table */
+
+/*
+ * Shell variables.
+ */
+
+/* flags */
+#define VEXPORT 0x01 /* variable is exported */
+#define VREADONLY 0x02 /* variable cannot be modified */
+#define VSTRFIXED 0x04 /* variable struct is staticly allocated */
+#define VTEXTFIXED 0x08 /* text is staticly allocated */
+#define VSTACK 0x10 /* text is allocated on the stack */
+#define VUNSET 0x20 /* the variable is not set */
+#define VNOFUNC 0x40 /* don't call the callback function */
+
+
+struct var {
+ struct var *next; /* next entry in hash list */
+ int flags; /* flags are defined above */
+ char *text; /* name=value */
+ void (*func) (const char *);
+ /* function to be called when */
+ /* the variable gets set/unset */
+};
-/*
- * Called to raise an exception. Since C doesn't include exceptions, we
- * just do a longjmp to the exception handler. The type of exception is
- * stored in the global variable "exception".
- */
+struct localvar {
+ struct localvar *next; /* next local variable in list */
+ struct var *vp; /* the variable that was made local */
+ int flags; /* saved flags */
+ char *text; /* saved text */
+};
-static void
-exraise(e)
- int e;
-{
-#ifdef DEBUG
- if (handler == NULL)
- abort();
+
+#if defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN)
+#define rmescapes(p) _rmescapes((p), 0)
+static char *_rmescapes (char *, int);
+#else
+static void rmescapes (char *);
#endif
- exception = e;
- longjmp(handler->loc, 1);
-}
+static int casematch (union node *, const char *);
+static void clearredir(void);
+static void popstring(void);
+static void readcmdfile (const char *);
-/*
- * Called from trap.c when a SIGINT is received. (If the user specifies
- * that SIGINT is to be trapped or ignored using the trap builtin, then
- * this routine is not called.) Suppressint is nonzero when interrupts
- * are held using the INTOFF macro. The call to _exit is necessary because
- * there is a short period after a fork before the signal handlers are
- * set to the appropriate value for the child. (The test for iflag is
- * just defensive programming.)
- */
+static int number (const char *);
+static int is_number (const char *, int *num);
+static char *single_quote (const char *);
+static int nextopt (const char *);
-static void
-onint() {
- sigset_t mysigset;
+static void redirect (union node *, int);
+static void popredir (void);
+static int dup_as_newfd (int, int);
- if (suppressint) {
- intpending++;
- return;
- }
- intpending = 0;
- sigemptyset(&mysigset);
- sigprocmask(SIG_SETMASK, &mysigset, NULL);
- if (rootshell && iflag)
- exraise(EXINT);
- else {
- signal(SIGINT, SIG_DFL);
- raise(SIGINT);
- }
- /* NOTREACHED */
-}
+static void changepath(const char *newval);
+static void getoptsreset(const char *value);
-/*
- * Exverror is called to raise the error exception. If the first argument
- * is not NULL then error prints an error message using printf style
- * formatting. It then raises the error exception.
- */
-static void
-exverror(cond, msg, ap)
- int cond;
- const char *msg;
- va_list ap;
-{
- CLEAR_PENDING_INT;
- INTOFF;
+static int parsenleft; /* copy of parsefile->nleft */
+static char *parsenextc; /* copy of parsefile->nextc */
+static int rootpid; /* pid of main shell */
+static int rootshell; /* true if we aren't a child of the main shell */
-#ifdef DEBUG
- if (msg)
- TRACE(("exverror(%d, \"%s\") pid=%d\n", cond, msg, getpid()));
- else
- TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
-#endif
- if (msg) {
- if (commandname)
- outfmt(&errout, "%s: ", commandname);
- doformat(&errout, msg, ap);
-#if FLUSHERR
- outc('\n', &errout);
-#else
- outcslow('\n', &errout);
-#endif
- }
- flushall();
- exraise(cond);
- /* NOTREACHED */
-}
+static const char spcstr[] = " ";
+static const char snlfmt[] = "%s\n";
+
+static int sstrnleft;
+static int herefd = -1;
+static struct localvar *localvars;
-#ifdef __STDC__
-static void
-error(const char *msg, ...)
-#else
-static void
-error(va_alist)
- va_dcl
-#endif
-{
-#ifndef __STDC__
- const char *msg;
-#endif
- va_list ap;
-#ifdef __STDC__
- va_start(ap, msg);
-#else
- va_start(ap);
- msg = va_arg(ap, const char *);
+static struct var vifs;
+static struct var vmail;
+static struct var vmpath;
+static struct var vpath;
+static struct var vps1;
+static struct var vps2;
+static struct var voptind;
+#ifdef BB_LOCALE_SUPPORT
+static struct var vlc_all;
+static struct var vlc_ctype;
#endif
- exverror(EXERROR, msg, ap);
- /* NOTREACHED */
- va_end(ap);
-}
+struct varinit {
+ struct var *var;
+ int flags;
+ const char *text;
+ void (*func) (const char *);
+};
+
+static const char defpathvar[] =
+ "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin";
+#define defpath (defpathvar + 5)
-#ifdef __STDC__
-static void
-exerror(int cond, const char *msg, ...)
+#ifdef IFS_BROKEN
+static const char defifsvar[] = "IFS= \t\n";
+#define defifs (defifsvar + 4)
#else
-static void
-exerror(va_alist)
- va_dcl
-#endif
-{
-#ifndef __STDC__
- int cond;
- const char *msg;
+static const char defifs[] = " \t\n";
#endif
- va_list ap;
-#ifdef __STDC__
- va_start(ap, msg);
+
+static const struct varinit varinit[] = {
+#ifdef IFS_BROKEN
+ { &vifs, VSTRFIXED|VTEXTFIXED, defifsvar,
#else
- va_start(ap);
- cond = va_arg(ap, int);
- msg = va_arg(ap, const char *);
+ { &vifs, VSTRFIXED|VTEXTFIXED|VUNSET, "IFS=",
#endif
- exverror(cond, msg, ap);
- /* NOTREACHED */
- va_end(ap);
-}
+ NULL },
+ { &vmail, VSTRFIXED|VTEXTFIXED|VUNSET, "MAIL=",
+ NULL },
+ { &vmpath, VSTRFIXED|VTEXTFIXED|VUNSET, "MAILPATH=",
+ NULL },
+ { &vpath, VSTRFIXED|VTEXTFIXED, defpathvar,
+ changepath },
+ /*
+ * vps1 depends on uid
+ */
+ { &vps2, VSTRFIXED|VTEXTFIXED, "PS2=> ",
+ NULL },
+ { &voptind, VSTRFIXED|VTEXTFIXED, "OPTIND=1",
+ getoptsreset },
+#ifdef BB_LOCALE_SUPPORT
+ { &vlc_all, VSTRFIXED|VTEXTFIXED|VUNSET, "LC_ALL=",
+ change_lc_all },
+ { &vlc_ctype, VSTRFIXED|VTEXTFIXED|VUNSET, "LC_CTYPE=",
+ change_lc_ctype },
+#endif
+ { NULL, 0, NULL,
+ NULL }
+};
+#define VTABSIZE 39
+static struct var *vartab[VTABSIZE];
/*
- * Table of error messages.
+ * The following macros access the values of the above variables.
+ * They have to skip over the name. They return the null string
+ * for unset variables.
*/
-struct errname {
- short errcode; /* error number */
- short action; /* operation which encountered the error */
- const char *msg; /* text describing the error */
-};
+#define ifsval() (vifs.text + 4)
+#define ifsset() ((vifs.flags & VUNSET) == 0)
+#define mailval() (vmail.text + 5)
+#define mpathval() (vmpath.text + 9)
+#define pathval() (vpath.text + 5)
+#define ps1val() (vps1.text + 4)
+#define ps2val() (vps2.text + 4)
+#define optindval() (voptind.text + 7)
+#define mpathset() ((vmpath.flags & VUNSET) == 0)
-#define ALL (E_OPEN|E_CREAT|E_EXEC)
+static void initvar (void);
+static void setvar (const char *, const char *, int);
+static void setvareq (char *, int);
+static void listsetvar (struct strlist *);
+static const char *lookupvar (const char *);
+static const char *bltinlookup (const char *);
+static char **environment (void);
+static int showvarscmd (int, char **);
+static void mklocal (char *);
+static void poplocalvars (void);
+static int unsetvar (const char *);
+static int varequal (const char *, const char *);
-static const struct errname errormsg[] = {
- { EINTR, ALL, "interrupted" },
- { EACCES, ALL, "permission denied" },
- { EIO, ALL, "I/O error" },
- { ENOENT, E_OPEN, "no such file" },
- { ENOENT, E_CREAT,"directory nonexistent" },
- { ENOENT, E_EXEC, "not found" },
- { ENOTDIR, E_OPEN, "no such file" },
- { ENOTDIR, E_CREAT,"directory nonexistent" },
- { ENOTDIR, E_EXEC, "not found" },
- { EISDIR, ALL, "is a directory" },
- { EEXIST, E_CREAT,"file exists" },
-#ifdef notdef
- { EMFILE, ALL, "too many open files" },
-#endif
- { ENFILE, ALL, "file table overflow" },
- { ENOSPC, ALL, "file system full" },
-#ifdef EDQUOT
- { EDQUOT, ALL, "disk quota exceeded" },
-#endif
-#ifdef ENOSR
- { ENOSR, ALL, "no streams resources" },
-#endif
- { ENXIO, ALL, "no such device or address" },
- { EROFS, ALL, "read-only file system" },
- { ETXTBSY, ALL, "text busy" },
-#ifdef SYSV
- { EAGAIN, E_EXEC, "not enough memory" },
-#endif
- { ENOMEM, ALL, "not enough memory" },
-#ifdef ENOLINK
- { ENOLINK, ALL, "remote access failed" },
-#endif
-#ifdef EMULTIHOP
- { EMULTIHOP, ALL, "remote access failed" },
-#endif
-#ifdef ECOMM
- { ECOMM, ALL, "remote access failed" },
-#endif
-#ifdef ESTALE
- { ESTALE, ALL, "remote access failed" },
-#endif
-#ifdef ETIMEDOUT
- { ETIMEDOUT, ALL, "remote access failed" },
-#endif
-#ifdef ELOOP
- { ELOOP, ALL, "symbolic link loop" },
-#endif
- { E2BIG, E_EXEC, "argument list too long" },
-#ifdef ELIBACC
- { ELIBACC, E_EXEC, "shared library missing" },
-#endif
- { 0, 0, NULL },
-};
+static char *arg0; /* value of $0 */
+static struct shparam shellparam; /* current positional parameters */
+static char **argptr; /* argument list for builtin commands */
+static char *optionarg; /* set by nextopt (like getopt) */
+static char *optptr; /* used by nextopt */
+static char *minusc; /* argument to -c option */
-/*
- * Return a string describing an error. The returned string may be a
- * pointer to a static buffer that will be overwritten on the next call.
- * Action describes the operation that got the error.
- */
-static const char *
-errmsg(e, action)
- int e;
- int action;
-{
- struct errname const *ep;
- static char buf[12];
+#ifdef ASH_ALIAS
- for (ep = errormsg ; ep->errcode ; ep++) {
- if (ep->errcode == e && (ep->action & action) != 0)
- return ep->msg;
- }
- fmtstr(buf, sizeof buf, "error %d", e);
- return buf;
-}
+#define ALIASINUSE 1
+#define ALIASDEAD 2
+
+#define ATABSIZE 39
+
+struct alias {
+ struct alias *next;
+ char *name;
+ char *val;
+ int flag;
+};
+
+static struct alias *atab[ATABSIZE];
+static void setalias (char *, char *);
+static struct alias **hashalias (const char *);
+static struct alias *freealias (struct alias *);
+static struct alias **__lookupalias (const char *);
-#ifdef REALLY_SMALL
static void
-__inton() {
- if (--suppressint == 0 && intpending) {
- onint();
+setalias(name, val)
+ char *name, *val;
+{
+ struct alias *ap, **app;
+
+ app = __lookupalias(name);
+ ap = *app;
+ INTOFF;
+ if (ap) {
+ if (!(ap->flag & ALIASINUSE)) {
+ ckfree(ap->val);
+ }
+ ap->val = savestr(val);
+ ap->flag &= ~ALIASDEAD;
+ } else {
+ /* not found */
+ ap = ckmalloc(sizeof (struct alias));
+ ap->name = savestr(name);
+ ap->val = savestr(val);
+ ap->flag = 0;
+ ap->next = 0;
+ *app = ap;
}
+ INTON;
}
-#endif
-/* $NetBSD: eval.c,v 1.57 2001/02/04 19:52:06 christos Exp $ */
+static int
+unalias(char *name)
+{
+ struct alias **app;
-/* flags in argument to evaltree */
-#define EV_EXIT 01 /* exit after evaluating tree */
-#define EV_TESTED 02 /* exit status is checked; ignore -e flag */
-#define EV_BACKCMD 04 /* command executing within back quotes */
-
-static int evalskip; /* set if we are skipping commands */
-static int skipcount; /* number of levels to skip */
-static int loopnest; /* current loop nesting level */
-static int funcnest; /* depth of function calls */
-
-
-static char *commandname;
-struct strlist *cmdenviron;
-static int exitstatus; /* exit status of last command */
-static int oexitstatus; /* saved exit status */
-
-
-static void evalloop __P((union node *, int));
-static void evalfor __P((union node *, int));
-static void evalcase __P((union node *, int));
-static void evalsubshell __P((union node *, int));
-static void expredir __P((union node *));
-static void evalpipe __P((union node *));
-#ifdef notyet
-static void evalcommand __P((union node *, int, struct backcmd *));
-#else
-static void evalcommand __P((union node *, int));
-#endif
-static void prehash __P((union node *));
-static void eprintlist __P((struct strlist *));
+ app = __lookupalias(name);
+ if (*app) {
+ INTOFF;
+ *app = freealias(*app);
+ INTON;
+ return (0);
+ }
-/*
- * Called to reset things after an exception.
- */
+ return (1);
+}
-#ifdef mkinit
-INCLUDE "eval.h"
+static void
+rmaliases(void)
+{
+ struct alias *ap, **app;
+ int i;
-RESET {
- evalskip = 0;
- loopnest = 0;
- funcnest = 0;
+ INTOFF;
+ for (i = 0; i < ATABSIZE; i++) {
+ app = &atab[i];
+ for (ap = *app; ap; ap = *app) {
+ *app = freealias(*app);
+ if (ap == *app) {
+ app = &ap->next;
+ }
+ }
+ }
+ INTON;
}
-SHELLPROC {
- exitstatus = 0;
+static struct alias *
+lookupalias(const char *name, int check)
+{
+ struct alias *ap = *__lookupalias(name);
+
+ if (check && ap && (ap->flag & ALIASINUSE))
+ return (NULL);
+ return (ap);
}
-#endif
+static void
+printalias(const struct alias *ap) {
+ char *p;
+
+ p = single_quote(ap->val);
+ printf("alias %s=%s\n", ap->name, p);
+ stunalloc(p);
+}
/*
- * The eval commmand.
+ * TODO - sort output
*/
-
static int
-evalcmd(argc, argv)
- int argc;
- char **argv;
+aliascmd(int argc, char **argv)
{
- char *p;
- char *concat;
- char **ap;
-
- if (argc > 1) {
- p = argv[1];
- if (argc > 2) {
- STARTSTACKSTR(concat);
- ap = argv + 2;
- for (;;) {
- while (*p)
- STPUTC(*p++, concat);
- if ((p = *ap++) == NULL)
- break;
- STPUTC(' ', concat);
- }
- STPUTC('\0', concat);
- p = grabstackstr(concat);
- }
- evalstring(p, EV_TESTED);
- }
- return exitstatus;
-}
+ char *n, *v;
+ int ret = 0;
+ struct alias *ap;
+ if (argc == 1) {
+ int i;
-/*
- * Execute a command or commands contained in a string.
- */
-
-static void
-evalstring(s, flag)
- char *s;
- int flag;
- {
- union node *n;
- struct stackmark smark;
-
- setstackmark(&smark);
- setinputstring(s);
- while ((n = parsecmd(0)) != NEOF) {
- evaltree(n, flag);
- popstackmark(&smark);
- }
- popfile();
- popstackmark(&smark);
-}
-
-
-
-/*
- * Evaluate a parse tree. The value is left in the global variable
- * exitstatus.
- */
-
-static void
-evaltree(n, flags)
- union node *n;
- int flags;
-{
- int checkexit = 0;
- if (n == NULL) {
- TRACE(("evaltree(NULL) called\n"));
- goto out;
- }
- TRACE(("evaltree(0x%lx: %d) called\n", (long)n, n->type));
- switch (n->type) {
- case NSEMI:
- evaltree(n->nbinary.ch1, flags & EV_TESTED);
- if (evalskip)
- goto out;
- evaltree(n->nbinary.ch2, flags);
- break;
- case NAND:
- evaltree(n->nbinary.ch1, EV_TESTED);
- if (evalskip || exitstatus != 0)
- goto out;
- evaltree(n->nbinary.ch2, flags);
- break;
- case NOR:
- evaltree(n->nbinary.ch1, EV_TESTED);
- if (evalskip || exitstatus == 0)
- goto out;
- evaltree(n->nbinary.ch2, flags);
- break;
- case NREDIR:
- expredir(n->nredir.redirect);
- redirect(n->nredir.redirect, REDIR_PUSH);
- evaltree(n->nredir.n, flags);
- popredir();
- break;
- case NSUBSHELL:
- evalsubshell(n, flags);
- break;
- case NBACKGND:
- evalsubshell(n, flags);
- break;
- case NIF: {
- evaltree(n->nif.test, EV_TESTED);
- if (evalskip)
- goto out;
- if (exitstatus == 0)
- evaltree(n->nif.ifpart, flags);
- else if (n->nif.elsepart)
- evaltree(n->nif.elsepart, flags);
- else
- exitstatus = 0;
- break;
+ for (i = 0; i < ATABSIZE; i++)
+ for (ap = atab[i]; ap; ap = ap->next) {
+ printalias(ap);
+ }
+ return (0);
}
- case NWHILE:
- case NUNTIL:
- evalloop(n, flags);
- break;
- case NFOR:
- evalfor(n, flags);
- break;
- case NCASE:
- evalcase(n, flags);
- break;
- case NDEFUN: {
- struct builtincmd *bcmd;
- if (
- (bcmd = find_builtin(n->narg.text)) &&
- bcmd->flags & BUILTIN_SPECIAL
- ) {
- outfmt(out2, "%s is a special built-in\n", n->narg.text);
- exitstatus = 1;
- break;
+ while ((n = *++argv) != NULL) {
+ if ((v = strchr(n+1, '=')) == NULL) { /* n+1: funny ksh stuff */
+ if ((ap = *__lookupalias(n)) == NULL) {
+ out2fmt("%s: %s not found\n", "alias", n);
+ ret = 1;
+ } else
+ printalias(ap);
+ }
+ else {
+ *v++ = '\0';
+ setalias(n, v);
}
- defun(n->narg.text, n->narg.next);
- exitstatus = 0;
- break;
}
- case NNOT:
- evaltree(n->nnot.com, EV_TESTED);
- exitstatus = !exitstatus;
- break;
- case NPIPE:
- evalpipe(n);
- checkexit = 1;
- break;
- case NCMD:
-#ifdef notyet
- evalcommand(n, flags, (struct backcmd *)NULL);
-#else
- evalcommand(n, flags);
-#endif
- checkexit = 1;
- break;
-#ifdef DEBUG
- default:
- out1fmt("Node type = %d\n", n->type);
-#ifndef USE_GLIBC_STDIO
- flushout(out1);
-#endif
- break;
-#endif
- }
-out:
- if (pendingsigs)
- dotrap();
- if (
- flags & EV_EXIT ||
- (checkexit && eflag && exitstatus && !(flags & EV_TESTED))
- )
- exitshell(exitstatus);
+ return (ret);
}
-
-static void
-evalloop(n, flags)
- union node *n;
- int flags;
+static int
+unaliascmd(int argc, char **argv)
{
- int status;
+ int i;
- loopnest++;
- status = 0;
- for (;;) {
- evaltree(n->nbinary.ch1, EV_TESTED);
- if (evalskip) {
-skipping: if (evalskip == SKIPCONT && --skipcount <= 0) {
- evalskip = 0;
- continue;
- }
- if (evalskip == SKIPBREAK && --skipcount <= 0)
- evalskip = 0;
- break;
+ while ((i = nextopt("a")) != '\0') {
+ if (i == 'a') {
+ rmaliases();
+ return (0);
}
- if (n->type == NWHILE) {
- if (exitstatus != 0)
- break;
- } else {
- if (exitstatus == 0)
- break;
+ }
+ for (i = 0; *argptr; argptr++) {
+ if (unalias(*argptr)) {
+ out2fmt("%s: %s not found\n", "unalias", *argptr);
+ i = 1;
}
- evaltree(n->nbinary.ch2, flags & EV_TESTED);
- status = exitstatus;
- if (evalskip)
- goto skipping;
}
- loopnest--;
- exitstatus = status;
+
+ return (i);
}
+static struct alias **
+hashalias(p)
+ const char *p;
+ {
+ unsigned int hashval;
+ hashval = *p << 4;
+ while (*p)
+ hashval+= *p++;
+ return &atab[hashval % ATABSIZE];
+}
-static void
-evalfor(n, flags)
- union node *n;
- int flags;
-{
- struct arglist arglist;
- union node *argp;
- struct strlist *sp;
- struct stackmark smark;
+static struct alias *
+freealias(struct alias *ap) {
+ struct alias *next;
- setstackmark(&smark);
- arglist.lastp = &arglist.list;
- for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
- oexitstatus = exitstatus;
- expandarg(argp, &arglist, EXP_FULL | EXP_TILDE | EXP_RECORD);
- if (evalskip)
- goto out;
+ if (ap->flag & ALIASINUSE) {
+ ap->flag |= ALIASDEAD;
+ return ap;
}
- *arglist.lastp = NULL;
- exitstatus = 0;
- loopnest++;
- for (sp = arglist.list ; sp ; sp = sp->next) {
- setvar(n->nfor.var, sp->text, 0);
- evaltree(n->nfor.body, flags & EV_TESTED);
- if (evalskip) {
- if (evalskip == SKIPCONT && --skipcount <= 0) {
- evalskip = 0;
- continue;
- }
- if (evalskip == SKIPBREAK && --skipcount <= 0)
- evalskip = 0;
+ next = ap->next;
+ ckfree(ap->name);
+ ckfree(ap->val);
+ ckfree(ap);
+ return next;
+}
+
+
+static struct alias **
+__lookupalias(const char *name) {
+ struct alias **app = hashalias(name);
+
+ for (; *app; app = &(*app)->next) {
+ if (equal(name, (*app)->name)) {
break;
}
}
- loopnest--;
-out:
- popstackmark(&smark);
-}
+ return app;
+}
+#endif
+#ifdef ASH_MATH_SUPPORT
+/* The generated file arith.c has been replaced with a custom hand
+ * written implementation written by Aaron Lehmann <aaronl@vitelus.com>.
+ * This is now part of libbb, so that it can be used by all the shells
+ * in busybox. */
+static void expari (int);
+#endif
-static void
-evalcase(n, flags)
- union node *n;
- int flags;
-{
- union node *cp;
- union node *patp;
- struct arglist arglist;
- struct stackmark smark;
+static char *trap[NSIG]; /* trap handler commands */
+static char sigmode[NSIG - 1]; /* current value of signal */
+static char gotsig[NSIG - 1]; /* indicates specified signal received */
+static int pendingsigs; /* indicates some signal received */
- setstackmark(&smark);
- arglist.lastp = &arglist.list;
- oexitstatus = exitstatus;
- expandarg(n->ncase.expr, &arglist, EXP_TILDE);
- for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) {
- for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
- if (casematch(patp, arglist.list->text)) {
- if (evalskip == 0) {
- evaltree(cp->nclist.body, flags);
- }
- goto out;
- }
- }
- }
-out:
- popstackmark(&smark);
-}
+/*
+ * This file was generated by the mkbuiltins program.
+ */
+#ifdef JOBS
+static int bgcmd (int, char **);
+static int fgcmd (int, char **);
+static int killcmd (int, char **);
+#endif
+static int bltincmd (int, char **);
+static int cdcmd (int, char **);
+static int breakcmd (int, char **);
+#ifdef ASH_CMDCMD
+static int commandcmd (int, char **);
+#endif
+static int dotcmd (int, char **);
+static int evalcmd (int, char **);
+static int execcmd (int, char **);
+static int exitcmd (int, char **);
+static int exportcmd (int, char **);
+static int histcmd (int, char **);
+static int hashcmd (int, char **);
+static int helpcmd (int, char **);
+static int jobscmd (int, char **);
+static int localcmd (int, char **);
+#ifndef BB_PWD
+static int pwdcmd (int, char **);
+#endif
+static int readcmd (int, char **);
+static int returncmd (int, char **);
+static int setcmd (int, char **);
+static int setvarcmd (int, char **);
+static int shiftcmd (int, char **);
+static int trapcmd (int, char **);
+static int umaskcmd (int, char **);
+#ifdef ASH_ALIAS
+static int aliascmd (int, char **);
+static int unaliascmd (int, char **);
+#endif
+static int unsetcmd (int, char **);
+static int waitcmd (int, char **);
+static int ulimitcmd (int, char **);
+static int timescmd (int, char **);
+#ifdef ASH_MATH_SUPPORT
+static int letcmd (int, char **);
+#endif
+static int typecmd (int, char **);
+#ifdef ASH_GETOPTS
+static int getoptscmd (int, char **);
+#endif
+#ifndef BB_TRUE_FALSE
+static int true_main (int, char **);
+static int false_main (int, char **);
+#endif
-/*
- * Kick off a subshell to evaluate a tree.
- */
+static void setpwd (const char *, int);
-static void
-evalsubshell(n, flags)
- union node *n;
- int flags;
-{
- struct job *jp;
- int backgnd = (n->type == NBACKGND);
- expredir(n->nredir.redirect);
- jp = makejob(n, 1);
- if (forkshell(jp, n, backgnd) == 0) {
- if (backgnd)
- flags &=~ EV_TESTED;
- redirect(n->nredir.redirect, 0);
- evaltree(n->nredir.n, flags | EV_EXIT); /* never returns */
- }
- if (! backgnd) {
- INTOFF;
- exitstatus = waitforjob(jp);
- INTON;
- }
-}
+#define BUILTIN_NOSPEC "0"
+#define BUILTIN_SPECIAL "1"
+#define BUILTIN_REGULAR "2"
+#define BUILTIN_ASSIGN "4"
+#define BUILTIN_SPEC_ASSG "5"
+#define BUILTIN_REG_ASSG "6"
+
+#define IS_BUILTIN_SPECIAL(builtincmd) ((builtincmd)->name[0] & 1)
+#define IS_BUILTIN_REGULAR(builtincmd) ((builtincmd)->name[0] & 2)
+#define IS_BUILTIN_ASSIGN(builtincmd) ((builtincmd)->name[0] & 4)
+
+struct builtincmd {
+ const char *name;
+ int (*const builtinfunc) (int, char **);
+ //unsigned flags;
+};
+
+
+/* It is CRUCIAL that this listing be kept in ascii order, otherwise
+ * the binary search in find_builtin() will stop working. If you value
+ * your kneecaps, you'll be sure to *make sure* that any changes made
+ * to this array result in the listing remaining in ascii order. You
+ * have been warned.
+ */
+static const struct builtincmd builtincmds[] = {
+ { BUILTIN_SPECIAL ".", dotcmd }, /* first, see declare DOTCMD */
+ { BUILTIN_SPECIAL ":", true_main },
+#ifdef ASH_ALIAS
+ { BUILTIN_REG_ASSG "alias", aliascmd },
+#endif
+#ifdef JOBS
+ { BUILTIN_REGULAR "bg", bgcmd },
+#endif
+ { BUILTIN_SPECIAL "break", breakcmd },
+ { BUILTIN_SPECIAL "builtin", bltincmd },
+ { BUILTIN_REGULAR "cd", cdcmd },
+ { BUILTIN_NOSPEC "chdir", cdcmd },
+#ifdef ASH_CMDCMD
+ { BUILTIN_REGULAR "command", commandcmd },
+#endif
+ { BUILTIN_SPECIAL "continue", breakcmd },
+ { BUILTIN_SPECIAL "eval", evalcmd },
+ { BUILTIN_SPECIAL "exec", execcmd },
+ { BUILTIN_SPECIAL "exit", exitcmd },
+ { BUILTIN_SPEC_ASSG "export", exportcmd },
+ { BUILTIN_REGULAR "false", false_main },
+ { BUILTIN_REGULAR "fc", histcmd },
+#ifdef JOBS
+ { BUILTIN_REGULAR "fg", fgcmd },
+#endif
+#ifdef ASH_GETOPTS
+ { BUILTIN_REGULAR "getopts", getoptscmd },
+#endif
+ { BUILTIN_NOSPEC "hash", hashcmd },
+ { BUILTIN_NOSPEC "help", helpcmd },
+ { BUILTIN_REGULAR "jobs", jobscmd },
+#ifdef JOBS
+ { BUILTIN_REGULAR "kill", killcmd },
+#endif
+#ifdef ASH_MATH_SUPPORT
+ { BUILTIN_REGULAR "let", letcmd },
+#endif
+ { BUILTIN_ASSIGN "local", localcmd },
+#ifndef BB_PWD
+ { BUILTIN_NOSPEC "pwd", pwdcmd },
+#endif
+ { BUILTIN_REGULAR "read", readcmd },
+ { BUILTIN_SPEC_ASSG "readonly", exportcmd },
+ { BUILTIN_SPECIAL "return", returncmd },
+ { BUILTIN_SPECIAL "set", setcmd },
+ { BUILTIN_NOSPEC "setvar", setvarcmd },
+ { BUILTIN_SPECIAL "shift", shiftcmd },
+ { BUILTIN_SPECIAL "times", timescmd },
+ { BUILTIN_SPECIAL "trap", trapcmd },
+ { BUILTIN_REGULAR "true", true_main },
+ { BUILTIN_NOSPEC "type", typecmd },
+ { BUILTIN_NOSPEC "ulimit", ulimitcmd },
+ { BUILTIN_REGULAR "umask", umaskcmd },
+#ifdef ASH_ALIAS
+ { BUILTIN_REGULAR "unalias", unaliascmd },
+#endif
+ { BUILTIN_SPECIAL "unset", unsetcmd },
+ { BUILTIN_REGULAR "wait", waitcmd },
+};
+#define NUMBUILTINS (sizeof (builtincmds) / sizeof (struct builtincmd) )
+#define DOTCMD &builtincmds[0]
+static struct builtincmd *BLTINCMD;
+static struct builtincmd *EXECCMD;
+static struct builtincmd *EVALCMD;
+/* states */
+#define JOBSTOPPED 1 /* all procs are stopped */
+#define JOBDONE 2 /* all procs are completed */
/*
- * Compute the names of the files in a redirection list.
+ * A job structure contains information about a job. A job is either a
+ * single process or a set of processes contained in a pipeline. In the
+ * latter case, pidlist will be non-NULL, and will point to a -1 terminated
+ * array of pids.
*/
-static void
-expredir(n)
- union node *n;
-{
- union node *redir;
+struct procstat {
+ pid_t pid; /* process id */
+ int status; /* status flags (defined above) */
+ char *cmd; /* text of command being run */
+};
- for (redir = n ; redir ; redir = redir->nfile.next) {
- struct arglist fn;
- fn.lastp = &fn.list;
- oexitstatus = exitstatus;
- switch (redir->type) {
- case NFROMTO:
- case NFROM:
- case NTO:
- case NAPPEND:
- case NTOOV:
- expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR);
- redir->nfile.expfname = fn.list->text;
- break;
- case NFROMFD:
- case NTOFD:
- if (redir->ndup.vname) {
- expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE);
- fixredir(redir, fn.list->text, 1);
- }
- break;
- }
- }
-}
+static int job_warning; /* user was warned about stopped jobs */
+#ifdef JOBS
+static void setjobctl(int enable);
+#else
+#define setjobctl(on) /* do nothing */
+#endif
-/*
- * Evaluate a pipeline. All the processes in the pipeline are children
- * of the process creating the pipeline. (This differs from some versions
- * of the shell, which make the last process in a pipeline the parent
- * of all the rest.)
- */
-static void
-evalpipe(n)
- union node *n;
-{
- struct job *jp;
- struct nodelist *lp;
- int pipelen;
- int prevfd;
- int pip[2];
+struct job {
+ struct procstat ps0; /* status of process */
+ struct procstat *ps; /* status or processes when more than one */
+ short nprocs; /* number of processes */
+ short pgrp; /* process group of this job */
+ char state; /* true if job is finished */
+ char used; /* true if this entry is in used */
+ char changed; /* true if status has changed */
+#ifdef JOBS
+ char jobctl; /* job running under job control */
+#endif
+};
- TRACE(("evalpipe(0x%lx) called\n", (long)n));
- pipelen = 0;
- for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
- pipelen++;
- INTOFF;
- jp = makejob(n, pipelen);
- prevfd = -1;
- for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
- prehash(lp->n);
- pip[1] = -1;
- if (lp->next) {
- if (pipe(pip) < 0) {
- close(prevfd);
- error("Pipe call failed");
- }
- }
- if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
- INTON;
- if (prevfd > 0) {
- close(0);
- dup_as_newfd(prevfd, 0);
- close(prevfd);
- if (pip[0] == 0) {
- pip[0] = -1;
- }
- }
- if (pip[1] >= 0) {
- if (pip[0] >= 0) {
- close(pip[0]);
- }
- if (pip[1] != 1) {
- close(1);
- dup_as_newfd(pip[1], 1);
- close(pip[1]);
- }
- }
- evaltree(lp->n, EV_EXIT);
- }
- if (prevfd >= 0)
- close(prevfd);
- prevfd = pip[0];
- close(pip[1]);
- }
- INTON;
- if (n->npipe.backgnd == 0) {
- INTOFF;
- exitstatus = waitforjob(jp);
- TRACE(("evalpipe: job done exit status %d\n", exitstatus));
- INTON;
- }
-}
+static struct job *jobtab; /* array of jobs */
+static int njobs; /* size of array */
+static int backgndpid = -1; /* pid of last background process */
+#ifdef JOBS
+static int initialpgrp; /* pgrp of shell on invocation */
+static int curjob; /* current job */
+static int jobctl;
+#endif
+static int intreceived;
+static struct job *makejob (const union node *, int);
+static int forkshell (struct job *, const union node *, int);
+static int waitforjob (struct job *);
+static int docd (char *, int);
+static char *getcomponent (void);
+static void updatepwd (const char *);
+static void getpwd (void);
-/*
- * Execute a command inside back quotes. If it's a builtin command, we
- * want to save its output in a block obtained from malloc. Otherwise
- * we fork off a subprocess and get the output of the command via a pipe.
- * Should be called with interrupts off.
- */
+static char *padvance (const char **, const char *);
-static void
-evalbackcmd(n, result)
- union node *n;
- struct backcmd *result;
+static char nullstr[1]; /* zero length string */
+static char *curdir = nullstr; /* current working directory */
+static char *cdcomppath;
+
+static int
+cdcmd(argc, argv)
+ int argc;
+ char **argv;
{
- int pip[2];
- struct job *jp;
- struct stackmark smark; /* unnecessary */
+ const char *dest;
+ const char *path;
+ char *p;
+ struct stat statb;
+ int print = 0;
- setstackmark(&smark);
- result->fd = -1;
- result->buf = NULL;
- result->nleft = 0;
- result->jp = NULL;
- if (n == NULL) {
- exitstatus = 0;
- goto out;
+ nextopt(nullstr);
+ if ((dest = *argptr) == NULL && (dest = bltinlookup("HOME")) == NULL)
+ error("HOME not set");
+ if (*dest == '\0')
+ dest = ".";
+ if (dest[0] == '-' && dest[1] == '\0') {
+ dest = bltinlookup("OLDPWD");
+ if (!dest || !*dest) {
+ dest = curdir;
+ }
+ print = 1;
+ if (dest)
+ print = 1;
+ else
+ dest = ".";
}
-#ifdef notyet
- /*
- * For now we disable executing builtins in the same
- * context as the shell, because we are not keeping
- * enough state to recover from changes that are
- * supposed only to affect subshells. eg. echo "`cd /`"
- */
- if (n->type == NCMD) {
- exitstatus = oexitstatus;
- evalcommand(n, EV_BACKCMD, result);
- } else
-#endif
- {
- exitstatus = 0;
- if (pipe(pip) < 0)
- error("Pipe call failed");
- jp = makejob(n, 1);
- if (forkshell(jp, n, FORK_NOJOB) == 0) {
- FORCEINTON;
- close(pip[0]);
- if (pip[1] != 1) {
- close(1);
- dup_as_newfd(pip[1], 1);
- close(pip[1]);
+ if (*dest == '/' || (path = bltinlookup("CDPATH")) == NULL)
+ path = nullstr;
+ while ((p = padvance(&path, dest)) != NULL) {
+ if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
+ if (!print) {
+ /*
+ * XXX - rethink
+ */
+ if (p[0] == '.' && p[1] == '/' && p[2] != '\0')
+ p += 2;
+ print = strcmp(p, dest);
}
- eflag = 0;
- evaltree(n, EV_EXIT);
+ if (docd(p, print) >= 0)
+ return 0;
+
}
- close(pip[1]);
- result->fd = pip[0];
- result->jp = jp;
}
-out:
- popstackmark(&smark);
- TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n",
- result->fd, result->buf, result->nleft, result->jp));
+ error("can't cd to %s", dest);
+ /* NOTREACHED */
}
-
/*
- * Execute a simple command.
+ * Actually do the chdir. In an interactive shell, print the
+ * directory name if "print" is nonzero.
*/
-static void
-#ifdef notyet
-evalcommand(cmd, flags, backcmd)
- union node *cmd;
- int flags;
- struct backcmd *backcmd;
-#else
-evalcommand(cmd, flags)
- union node *cmd;
- int flags;
-#endif
-{
- struct stackmark smark;
- union node *argp;
+static int
+docd(dest, print)
+ char *dest;
+ int print;
+{
+ char *p;
+ char *q;
+ char *component;
+ struct stat statb;
+ int first;
+ int badstat;
+
+ TRACE(("docd(\"%s\", %d) called\n", dest, print));
+
+ /*
+ * Check each component of the path. If we find a symlink or
+ * something we can't stat, clear curdir to force a getcwd()
+ * next time we get the value of the current directory.
+ */
+ badstat = 0;
+ cdcomppath = sstrdup(dest);
+ STARTSTACKSTR(p);
+ if (*dest == '/') {
+ STPUTC('/', p);
+ cdcomppath++;
+ }
+ first = 1;
+ while ((q = getcomponent()) != NULL) {
+ if (q[0] == '\0' || (q[0] == '.' && q[1] == '\0'))
+ continue;
+ if (! first)
+ STPUTC('/', p);
+ first = 0;
+ component = q;
+ while (*q)
+ STPUTC(*q++, p);
+ if (equal(component, ".."))
+ continue;
+ STACKSTRNUL(p);
+ if ((lstat(stackblock(), &statb) < 0)
+ || (S_ISLNK(statb.st_mode))) {
+ /* print = 1; */
+ badstat = 1;
+ break;
+ }
+ }
+
+ INTOFF;
+ if (chdir(dest) < 0) {
+ INTON;
+ return -1;
+ }
+ updatepwd(badstat ? NULL : dest);
+ INTON;
+ if (print && iflag)
+ printf(snlfmt, curdir);
+ return 0;
+}
+
+
+/*
+ * Get the next component of the path name pointed to by cdcomppath.
+ * This routine overwrites the string pointed to by cdcomppath.
+ */
+
+static char *
+getcomponent() {
+ char *p;
+ char *start;
+
+ if ((p = cdcomppath) == NULL)
+ return NULL;
+ start = cdcomppath;
+ while (*p != '/' && *p != '\0')
+ p++;
+ if (*p == '\0') {
+ cdcomppath = NULL;
+ } else {
+ *p++ = '\0';
+ cdcomppath = p;
+ }
+ return start;
+}
+
+
+
+/*
+ * Update curdir (the name of the current directory) in response to a
+ * cd command. We also call hashcd to let the routines in exec.c know
+ * that the current directory has changed.
+ */
+
+static void hashcd (void);
+
+static void
+updatepwd(const char *dir)
+{
+ char *new;
+ char *p;
+ size_t len;
+
+ hashcd(); /* update command hash table */
+
+ /*
+ * If our argument is NULL, we don't know the current directory
+ * any more because we traversed a symbolic link or something
+ * we couldn't stat().
+ */
+ if (dir == NULL || curdir == nullstr) {
+ setpwd(0, 1);
+ return;
+ }
+ len = strlen(dir);
+ cdcomppath = sstrdup(dir);
+ STARTSTACKSTR(new);
+ if (*dir != '/') {
+ p = curdir;
+ while (*p)
+ STPUTC(*p++, new);
+ if (p[-1] == '/')
+ STUNPUTC(new);
+ }
+ while ((p = getcomponent()) != NULL) {
+ if (equal(p, "..")) {
+ while (new > stackblock() && (STUNPUTC(new), *new) != '/');
+ } else if (*p != '\0' && ! equal(p, ".")) {
+ STPUTC('/', new);
+ while (*p)
+ STPUTC(*p++, new);
+ }
+ }
+ if (new == stackblock())
+ STPUTC('/', new);
+ STACKSTRNUL(new);
+ setpwd(stackblock(), 1);
+}
+
+
+#ifndef BB_PWD
+static int
+pwdcmd(argc, argv)
+ int argc;
+ char **argv;
+{
+ printf(snlfmt, curdir);
+ return 0;
+}
+#endif
+
+/*
+ * Find out what the current directory is. If we already know the current
+ * directory, this routine returns immediately.
+ */
+static void
+getpwd(void)
+{
+ curdir = xgetcwd(0);
+ if(curdir==0)
+ curdir = nullstr;
+}
+
+static void
+setpwd(const char *val, int setold)
+{
+ if (setold) {
+ setvar("OLDPWD", curdir, VEXPORT);
+ }
+ INTOFF;
+ if (curdir != nullstr) {
+ free(curdir);
+ curdir = nullstr;
+ }
+ if (!val) {
+ getpwd();
+ } else {
+ curdir = savestr(val);
+ }
+ INTON;
+ setvar("PWD", curdir, VEXPORT);
+}
+
+/*
+ * Errors and exceptions.
+ */
+
+/*
+ * Code to handle exceptions in C.
+ */
+
+/*
+ * We enclose jmp_buf in a structure so that we can declare pointers to
+ * jump locations. The global variable handler contains the location to
+ * jump to when an exception occurs, and the global variable exception
+ * contains a code identifying the exeception. To implement nested
+ * exception handlers, the user should save the value of handler on entry
+ * to an inner scope, set handler to point to a jmploc structure for the
+ * inner scope, and restore handler on exit from the scope.
+ */
+
+struct jmploc {
+ jmp_buf loc;
+};
+
+/* exceptions */
+#define EXINT 0 /* SIGINT received */
+#define EXERROR 1 /* a generic error */
+#define EXSHELLPROC 2 /* execute a shell procedure */
+#define EXEXEC 3 /* command execution failed */
+
+static struct jmploc *handler;
+static int exception;
+
+static void exverror (int, const char *, va_list)
+ __attribute__((__noreturn__));
+
+/*
+ * Called to raise an exception. Since C doesn't include exceptions, we
+ * just do a longjmp to the exception handler. The type of exception is
+ * stored in the global variable "exception".
+ */
+
+static void exraise (int) __attribute__((__noreturn__));
+
+static void
+exraise(int e)
+{
+#ifdef DEBUG
+ if (handler == NULL)
+ abort();
+#endif
+ flushall();
+ exception = e;
+ longjmp(handler->loc, 1);
+}
+
+
+/*
+ * Called from trap.c when a SIGINT is received. (If the user specifies
+ * that SIGINT is to be trapped or ignored using the trap builtin, then
+ * this routine is not called.) Suppressint is nonzero when interrupts
+ * are held using the INTOFF macro. The call to _exit is necessary because
+ * there is a short period after a fork before the signal handlers are
+ * set to the appropriate value for the child. (The test for iflag is
+ * just defensive programming.)
+ */
+
+static void
+onint(void) {
+ sigset_t mysigset;
+
+ if (suppressint) {
+ intpending++;
+ return;
+ }
+ intpending = 0;
+ sigemptyset(&mysigset);
+ sigprocmask(SIG_SETMASK, &mysigset, NULL);
+ if (rootshell && iflag)
+ exraise(EXINT);
+ else {
+ signal(SIGINT, SIG_DFL);
+ raise(SIGINT);
+ }
+ /* NOTREACHED */
+}
+
+
+static char *commandname; /* currently executing command */
+
+/*
+ * Exverror is called to raise the error exception. If the first argument
+ * is not NULL then error prints an error message using printf style
+ * formatting. It then raises the error exception.
+ */
+static void
+exverror(int cond, const char *msg, va_list ap)
+{
+ CLEAR_PENDING_INT;
+ INTOFF;
+
+#ifdef DEBUG
+ if (msg)
+ TRACE(("exverror(%d, \"%s\") pid=%d\n", cond, msg, getpid()));
+ else
+ TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
+#endif
+ if (msg) {
+ if (commandname)
+ out2fmt("%s: ", commandname);
+ vfprintf(stderr, msg, ap);
+ out2c('\n');
+ }
+ exraise(cond);
+ /* NOTREACHED */
+}
+
+
+static void
+error(const char *msg, ...)
+{
+ va_list ap;
+ va_start(ap, msg);
+ exverror(EXERROR, msg, ap);
+ /* NOTREACHED */
+ va_end(ap);
+}
+
+
+static void
+exerror(int cond, const char *msg, ...)
+{
+ va_list ap;
+ va_start(ap, msg);
+ exverror(cond, msg, ap);
+ /* NOTREACHED */
+ va_end(ap);
+}
+
+
+
+/*
+ * Table of error messages.
+ */
+
+struct errname {
+ short errcode; /* error number */
+ char action; /* operation which encountered the error */
+};
+
+/*
+ * Types of operations (passed to the errmsg routine).
+ */
+
+#define E_OPEN 01 /* opening a file */
+#define E_CREAT 02 /* creating a file */
+#define E_EXEC 04 /* executing a program */
+
+#define ALL (E_OPEN|E_CREAT|E_EXEC)
+
+static const struct errname errormsg[] = {
+ { EINTR, ALL },
+ { EACCES, ALL },
+ { EIO, ALL },
+ { ENOENT, E_OPEN },
+ { ENOENT, E_CREAT },
+ { ENOENT, E_EXEC },
+ { ENOTDIR, E_OPEN },
+ { ENOTDIR, E_CREAT },
+ { ENOTDIR, E_EXEC },
+ { EISDIR, ALL },
+ { EEXIST, E_CREAT },
+#ifdef EMFILE
+ { EMFILE, ALL },
+#endif
+ { ENFILE, ALL },
+ { ENOSPC, ALL },
+#ifdef EDQUOT
+ { EDQUOT, ALL },
+#endif
+#ifdef ENOSR
+ { ENOSR, ALL },
+#endif
+ { ENXIO, ALL },
+ { EROFS, ALL },
+ { ETXTBSY, ALL },
+#ifdef EAGAIN
+ { EAGAIN, E_EXEC },
+#endif
+ { ENOMEM, ALL },
+#ifdef ENOLINK
+ { ENOLINK, ALL },
+#endif
+#ifdef EMULTIHOP
+ { EMULTIHOP, ALL },
+#endif
+#ifdef ECOMM
+ { ECOMM, ALL },
+#endif
+#ifdef ESTALE
+ { ESTALE, ALL },
+#endif
+#ifdef ETIMEDOUT
+ { ETIMEDOUT, ALL },
+#endif
+#ifdef ELOOP
+ { ELOOP, ALL },
+#endif
+ { E2BIG, E_EXEC },
+#ifdef ELIBACC
+ { ELIBACC, E_EXEC },
+#endif
+};
+
+#define ERRNAME_SIZE (sizeof(errormsg)/sizeof(struct errname))
+
+/*
+ * Return a string describing an error. The returned string may be a
+ * pointer to a static buffer that will be overwritten on the next call.
+ * Action describes the operation that got the error.
+ */
+
+static const char *
+errmsg(int e, int action)
+{
+ struct errname const *ep;
+ static char buf[12];
+
+ for (ep = errormsg ; ep < errormsg+ERRNAME_SIZE; ep++) {
+ if (ep->errcode == e && (ep->action & action) != 0)
+ return strerror(e);
+ }
+
+ snprintf(buf, sizeof buf, "error %d", e);
+ return buf;
+}
+
+
+#ifdef ASH_OPTIMIZE_FOR_SIZE
+static void
+__inton() {
+ if (--suppressint == 0 && intpending) {
+ onint();
+ }
+}
+static void forceinton (void) {
+ suppressint = 0;
+ if (intpending)
+ onint();
+}
+#endif
+
+/* flags in argument to evaltree */
+#define EV_EXIT 01 /* exit after evaluating tree */
+#define EV_TESTED 02 /* exit status is checked; ignore -e flag */
+#define EV_BACKCMD 04 /* command executing within back quotes */
+
+static int evalskip; /* set if we are skipping commands */
+static int skipcount; /* number of levels to skip */
+static int loopnest; /* current loop nesting level */
+static int funcnest; /* depth of function calls */
+
+
+static struct strlist *cmdenviron; /* environment for builtin command */
+static int exitstatus; /* exit status of last command */
+static int oexitstatus; /* saved exit status */
+
+static void evalsubshell (const union node *, int);
+static void expredir (union node *);
+static void prehash (union node *);
+static void eprintlist (struct strlist *);
+
+static union node *parsecmd(int);
+/*
+ * Called to reset things after an exception.
+ */
+
+/*
+ * The eval commmand.
+ */
+static void evalstring (char *, int);
+
+static int
+evalcmd(argc, argv)
+ int argc;
+ char **argv;
+{
+ char *p;
+ char *concat;
+ char **ap;
+
+ if (argc > 1) {
+ p = argv[1];
+ if (argc > 2) {
+ STARTSTACKSTR(concat);
+ ap = argv + 2;
+ for (;;) {
+ while (*p)
+ STPUTC(*p++, concat);
+ if ((p = *ap++) == NULL)
+ break;
+ STPUTC(' ', concat);
+ }
+ STPUTC('\0', concat);
+ p = grabstackstr(concat);
+ }
+ evalstring(p, EV_TESTED);
+ }
+ return exitstatus;
+}
+
+/*
+ * Execute a command or commands contained in a string.
+ */
+
+static void evaltree (union node *, int);
+static void setinputstring (char *);
+static void popfile (void);
+static void setstackmark(struct stackmark *mark);
+static void popstackmark(struct stackmark *mark);
+
+
+static void
+evalstring(char *s, int flag)
+{
+ union node *n;
+ struct stackmark smark;
+
+ setstackmark(&smark);
+ setinputstring(s);
+ while ((n = parsecmd(0)) != NEOF) {
+ evaltree(n, flag);
+ popstackmark(&smark);
+ }
+ popfile();
+ popstackmark(&smark);
+}
+
+static struct builtincmd *find_builtin (const char *);
+static void expandarg (union node *, struct arglist *, int);
+static void calcsize (const union node *);
+static union node *copynode (const union node *);
+
+/*
+ * Make a copy of a parse tree.
+ */
+
+static int funcblocksize; /* size of structures in function */
+static int funcstringsize; /* size of strings in node */
+static pointer funcblock; /* block to allocate function from */
+static char *funcstring; /* block to allocate strings from */
+
+
+static inline union node *
+copyfunc(union node *n)
+{
+ if (n == NULL)
+ return NULL;
+ funcblocksize = 0;
+ funcstringsize = 0;
+ calcsize(n);
+ funcblock = ckmalloc(funcblocksize + funcstringsize);
+ funcstring = (char *) funcblock + funcblocksize;
+ return copynode(n);
+}
+
+/*
+ * Free a parse tree.
+ */
+
+static void
+freefunc(union node *n)
+{
+ if (n)
+ ckfree(n);
+}
+
+
+/*
+ * Add a new command entry, replacing any existing command entry for
+ * the same name.
+ */
+
+static inline void
+addcmdentry(char *name, struct cmdentry *entry)
+{
+ struct tblentry *cmdp;
+
+ INTOFF;
+ cmdp = cmdlookup(name, 1);
+ if (cmdp->cmdtype == CMDFUNCTION) {
+ freefunc(cmdp->param.func);
+ }
+ cmdp->cmdtype = entry->cmdtype;
+ cmdp->param = entry->u;
+ INTON;
+}
+
+static inline void
+evalloop(const union node *n, int flags)
+{
+ int status;
+
+ loopnest++;
+ status = 0;
+ for (;;) {
+ evaltree(n->nbinary.ch1, EV_TESTED);
+ if (evalskip) {
+skipping: if (evalskip == SKIPCONT && --skipcount <= 0) {
+ evalskip = 0;
+ continue;
+ }
+ if (evalskip == SKIPBREAK && --skipcount <= 0)
+ evalskip = 0;
+ break;
+ }
+ if (n->type == NWHILE) {
+ if (exitstatus != 0)
+ break;
+ } else {
+ if (exitstatus == 0)
+ break;
+ }
+ evaltree(n->nbinary.ch2, flags & EV_TESTED);
+ status = exitstatus;
+ if (evalskip)
+ goto skipping;
+ }
+ loopnest--;
+ exitstatus = status;
+}
+
+static void
+evalfor(const union node *n, int flags)
+{
+ struct arglist arglist;
+ union node *argp;
+ struct strlist *sp;
+ struct stackmark smark;
+
+ setstackmark(&smark);
+ arglist.lastp = &arglist.list;
+ for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
+ oexitstatus = exitstatus;
+ expandarg(argp, &arglist, EXP_FULL | EXP_TILDE | EXP_RECORD);
+ if (evalskip)
+ goto out;
+ }
+ *arglist.lastp = NULL;
+
+ exitstatus = 0;
+ loopnest++;
+ for (sp = arglist.list ; sp ; sp = sp->next) {
+ setvar(n->nfor.var, sp->text, 0);
+ evaltree(n->nfor.body, flags & EV_TESTED);
+ if (evalskip) {
+ if (evalskip == SKIPCONT && --skipcount <= 0) {
+ evalskip = 0;
+ continue;
+ }
+ if (evalskip == SKIPBREAK && --skipcount <= 0)
+ evalskip = 0;
+ break;
+ }
+ }
+ loopnest--;
+out:
+ popstackmark(&smark);
+}
+
+static inline void
+evalcase(const union node *n, int flags)
+{
+ union node *cp;
+ union node *patp;
+ struct arglist arglist;
+ struct stackmark smark;
+
+ setstackmark(&smark);
+ arglist.lastp = &arglist.list;
+ oexitstatus = exitstatus;
+ expandarg(n->ncase.expr, &arglist, EXP_TILDE);
+ for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) {
+ for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
+ if (casematch(patp, arglist.list->text)) {
+ if (evalskip == 0) {
+ evaltree(cp->nclist.body, flags);
+ }
+ goto out;
+ }
+ }
+ }
+out:
+ popstackmark(&smark);
+}
+
+/*
+ * Evaluate a pipeline. All the processes in the pipeline are children
+ * of the process creating the pipeline. (This differs from some versions
+ * of the shell, which make the last process in a pipeline the parent
+ * of all the rest.)
+ */
+
+static inline void evalpipe(union node *n)
+{
+ struct job *jp;
+ struct nodelist *lp;
+ int pipelen;
+ int prevfd;
+ int pip[2];
+
+ TRACE(("evalpipe(0x%lx) called\n", (long)n));
+ pipelen = 0;
+ for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
+ pipelen++;
+ INTOFF;
+ jp = makejob(n, pipelen);
+ prevfd = -1;
+ for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
+ prehash(lp->n);
+ pip[1] = -1;
+ if (lp->next) {
+ if (pipe(pip) < 0) {
+ close(prevfd);
+ error("Pipe call failed");
+ }
+ }
+ if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
+ INTON;
+ if (prevfd > 0) {
+ close(0);
+ dup_as_newfd(prevfd, 0);
+ close(prevfd);
+ if (pip[0] == 0) {
+ pip[0] = -1;
+ }
+ }
+ if (pip[1] >= 0) {
+ if (pip[0] >= 0) {
+ close(pip[0]);
+ }
+ if (pip[1] != 1) {
+ close(1);
+ dup_as_newfd(pip[1], 1);
+ close(pip[1]);
+ }
+ }
+ evaltree(lp->n, EV_EXIT);
+ }
+ if (prevfd >= 0)
+ close(prevfd);
+ prevfd = pip[0];
+ close(pip[1]);
+ }
+ INTON;
+ if (n->npipe.backgnd == 0) {
+ INTOFF;
+ exitstatus = waitforjob(jp);
+ TRACE(("evalpipe: job done exit status %d\n", exitstatus));
+ INTON;
+ }
+}
+
+static void find_command (const char *, struct cmdentry *, int, const char *);
+
+static int
+isassignment(const char *word) {
+ if (!is_name(*word)) {
+ return 0;
+ }
+ do {
+ word++;
+ } while (is_in_name(*word));
+ return *word == '=';
+}
+
+
+static void
+evalcommand(union node *cmd, int flags)
+{
+ struct stackmark smark;
+ union node *argp;
struct arglist arglist;
struct arglist varlist;
char **argv;
char **envp;
struct strlist *sp;
int mode;
-#ifdef notyet
- int pip[2];
-#endif
struct cmdentry cmdentry;
struct job *jp;
char *volatile savecmdname;
}
if (argp) {
struct builtincmd *bcmd;
- bool pseudovarflag;
+ int pseudovarflag;
bcmd = find_builtin(arglist.list->text);
- pseudovarflag = bcmd && bcmd->flags & BUILTIN_ASSIGN;
+ pseudovarflag = bcmd && IS_BUILTIN_ASSIGN(bcmd);
for (; argp; argp = argp->narg.next) {
if (pseudovarflag && isassignment(argp->narg.text)) {
expandarg(argp, &arglist, EXP_VARTILDE);
/* Print the command if xflag is set. */
if (xflag) {
-#ifdef FLUSHERR
- outc('+', &errout);
-#else
- outcslow('+', &errout);
-#endif
+ out2c('+');
eprintlist(varlist.list);
eprintlist(arglist.list);
-#ifdef FLUSHERR
- outc('\n', &errout);
- flushout(&errout);
-#else
- outcslow('\n', &errout);
-#endif
+ out2c('\n');
}
/* Now locate the command. */
firstbltin = 0;
for(;;) {
find_command(argv[0], &cmdentry, findflag, path);
- if (cmdentry.cmdtype == CMDUNKNOWN) { /* command not found */
+ if (cmdentry.cmdtype == CMDUNKNOWN) { /* command not found */
exitstatus = 127;
-#ifdef FLUSHERR
- flushout(&errout);
-#endif
goto out;
}
/* implement bltin and command here */
if (--argc == 0)
goto found;
if (!(bcmd = find_builtin(*argv))) {
- outfmt(&errout, "%s: not found\n", *argv);
+ out2fmt("%s: not found\n", *argv);
exitstatus = 127;
-#ifdef FLUSHERR
- flushout(&errout);
-#endif
goto out;
}
cmdentry.u.cmd = bcmd;
break;
}
}
- if (cmdentry.u.cmd == COMMANDCMD) {
+ if (cmdentry.u.cmd == find_builtin("command")) {
argv++;
if (--argc == 0) {
goto found;
/* Fork off a child process if necessary. */
if (cmd->ncmd.backgnd
|| (cmdentry.cmdtype == CMDNORMAL && (flags & EV_EXIT) == 0)
-#ifdef notyet
- || ((flags & EV_BACKCMD) != 0
- && (cmdentry.cmdtype != CMDBUILTIN
- || cmdentry.u.bcmd == DOTCMD
- || cmdentry.u.bcmd == EVALCMD))
-#endif
) {
jp = makejob(cmd, 1);
mode = cmd->ncmd.backgnd;
-#ifdef notyet
- if (flags & EV_BACKCMD) {
- mode = FORK_NOJOB;
- if (pipe(pip) < 0)
- error("Pipe call failed");
- }
-#endif
if (forkshell(jp, cmd, mode) != 0)
- goto parent; /* at end of routine */
-#ifdef notyet
- if (flags & EV_BACKCMD) {
- FORCEINTON;
- close(pip[0]);
- if (pip[1] != 1) {
- close(1);
- dup_as_newfd(pip[1], 1);
- close(pip[1]);
- }
- }
-#endif
+ goto parent; /* at end of routine */
flags |= EV_EXIT;
}
trputs("builtin command: "); trargs(argv);
#endif
mode = (cmdentry.u.cmd == EXECCMD)? 0 : REDIR_PUSH;
-#ifdef notyet
- if (flags == EV_BACKCMD) {
-#ifdef USE_GLIBC_STDIO
- openmemout();
-#else
- memout.nleft = 0;
- memout.nextc = memout.buf;
- memout.bufsize = 64;
-#endif
- mode |= REDIR_BACKQ;
- }
-#endif
redirect(cmd->ncmd.redirect, mode);
savecmdname = commandname;
- if (firstbltin->flags & BUILTIN_SPECIAL) {
+ if (IS_BUILTIN_SPECIAL(firstbltin)) {
listsetvar(varlist.list);
} else {
cmdenviron = varlist.list;
handler = &jmploc;
commandname = argv[0];
argptr = argv + 1;
- optptr = NULL; /* initialize nextopt */
+ optptr = NULL; /* initialize nextopt */
exitstatus = (*cmdentry.u.cmd->builtinfunc)(argc, argv);
flushall();
cmddone:
- exitstatus |= outerr(out1);
- out1 = &output;
- out2 = &errout;
- freestdout();
cmdenviron = NULL;
if (e != EXSHELLPROC) {
commandname = savecmdname;
}
if (cmdentry.u.cmd != EXECCMD)
popredir();
-#ifdef notyet
- if (flags == EV_BACKCMD) {
- INTOFF;
-#ifdef USE_GLIBC_STDIO
- if (__closememout()) {
- error(
- "__closememout() failed: %s",
- strerror(errno)
- );
- }
-#endif
- backcmd->buf = memout.buf;
-#ifdef USE_GLIBC_STDIO
- backcmd->nleft = memout.bufsize;
-#else
- backcmd->nleft = memout.nextc - memout.buf;
-#endif
- memout.buf = NULL;
- INTON;
- }
-#endif
} else {
#ifdef DEBUG
trputs("normal command: "); trargs(argv);
envp = environment();
shellexec(argv, envp, path, cmdentry.u.index);
}
- goto out;
+ goto out;
+
+parent: /* parent process gets here (if we forked) */
+ if (mode == 0) { /* argument to fork */
+ INTOFF;
+ exitstatus = waitforjob(jp);
+ INTON;
+ }
+
+out:
+ if (lastarg)
+ setvar("_", lastarg, 0);
+ popstackmark(&smark);
+}
+
+/*
+ * Evaluate a parse tree. The value is left in the global variable
+ * exitstatus.
+ */
+static void
+evaltree(n, flags)
+ union node *n;
+ int flags;
+{
+ int checkexit = 0;
+ if (n == NULL) {
+ TRACE(("evaltree(NULL) called\n"));
+ goto out;
+ }
+ TRACE(("evaltree(0x%lx: %d) called\n", (long)n, n->type));
+ switch (n->type) {
+ case NSEMI:
+ evaltree(n->nbinary.ch1, flags & EV_TESTED);
+ if (evalskip)
+ goto out;
+ evaltree(n->nbinary.ch2, flags);
+ break;
+ case NAND:
+ evaltree(n->nbinary.ch1, EV_TESTED);
+ if (evalskip || exitstatus != 0)
+ goto out;
+ evaltree(n->nbinary.ch2, flags);
+ break;
+ case NOR:
+ evaltree(n->nbinary.ch1, EV_TESTED);
+ if (evalskip || exitstatus == 0)
+ goto out;
+ evaltree(n->nbinary.ch2, flags);
+ break;
+ case NREDIR:
+ expredir(n->nredir.redirect);
+ redirect(n->nredir.redirect, REDIR_PUSH);
+ evaltree(n->nredir.n, flags);
+ popredir();
+ break;
+ case NSUBSHELL:
+ evalsubshell(n, flags);
+ break;
+ case NBACKGND:
+ evalsubshell(n, flags);
+ break;
+ case NIF: {
+ evaltree(n->nif.test, EV_TESTED);
+ if (evalskip)
+ goto out;
+ if (exitstatus == 0)
+ evaltree(n->nif.ifpart, flags);
+ else if (n->nif.elsepart)
+ evaltree(n->nif.elsepart, flags);
+ else
+ exitstatus = 0;
+ break;
+ }
+ case NWHILE:
+ case NUNTIL:
+ evalloop(n, flags);
+ break;
+ case NFOR:
+ evalfor(n, flags);
+ break;
+ case NCASE:
+ evalcase(n, flags);
+ break;
+ case NDEFUN: {
+ struct builtincmd *bcmd;
+ struct cmdentry entry;
+ if (
+ (bcmd = find_builtin(n->narg.text)) &&
+ IS_BUILTIN_SPECIAL(bcmd)
+ ) {
+ out2fmt("%s is a special built-in\n", n->narg.text);
+ exitstatus = 1;
+ break;
+ }
+ entry.cmdtype = CMDFUNCTION;
+ entry.u.func = copyfunc(n->narg.next);
+ addcmdentry(n->narg.text, &entry);
+ exitstatus = 0;
+ break;
+ }
+ case NNOT:
+ evaltree(n->nnot.com, EV_TESTED);
+ exitstatus = !exitstatus;
+ break;
+
+ case NPIPE:
+ evalpipe(n);
+ checkexit = 1;
+ break;
+ case NCMD:
+ evalcommand(n, flags);
+ checkexit = 1;
+ break;
+#ifdef DEBUG
+ default:
+ printf("Node type = %d\n", n->type);
+ break;
+#endif
+ }
+out:
+ if (pendingsigs)
+ dotrap();
+ if (
+ flags & EV_EXIT ||
+ (checkexit && eflag && exitstatus && !(flags & EV_TESTED))
+ )
+ exitshell(exitstatus);
+}
+
+/*
+ * Kick off a subshell to evaluate a tree.
+ */
+
+static void
+evalsubshell(const union node *n, int flags)
+{
+ struct job *jp;
+ int backgnd = (n->type == NBACKGND);
+
+ expredir(n->nredir.redirect);
+ jp = makejob(n, 1);
+ if (forkshell(jp, n, backgnd) == 0) {
+ if (backgnd)
+ flags &=~ EV_TESTED;
+ redirect(n->nredir.redirect, 0);
+ evaltree(n->nredir.n, flags | EV_EXIT); /* never returns */
+ }
+ if (! backgnd) {
+ INTOFF;
+ exitstatus = waitforjob(jp);
+ INTON;
+ }
+}
+
+/*
+ * Compute the names of the files in a redirection list.
+ */
+
+static void fixredir(union node *n, const char *text, int err);
+
+static void
+expredir(union node *n)
+{
+ union node *redir;
+
+ for (redir = n ; redir ; redir = redir->nfile.next) {
+ struct arglist fn;
+ fn.lastp = &fn.list;
+ oexitstatus = exitstatus;
+ switch (redir->type) {
+ case NFROMTO:
+ case NFROM:
+ case NTO:
+ case NAPPEND:
+ case NTOOV:
+ expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR);
+ redir->nfile.expfname = fn.list->text;
+ break;
+ case NFROMFD:
+ case NTOFD:
+ if (redir->ndup.vname) {
+ expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE);
+ fixredir(redir, fn.list->text, 1);
+ }
+ break;
+ }
+ }
+}
-parent: /* parent process gets here (if we forked) */
- if (mode == 0) { /* argument to fork */
- INTOFF;
- exitstatus = waitforjob(jp);
- INTON;
-#ifdef notyet
- } else if (mode == 2) {
- backcmd->fd = pip[0];
- close(pip[1]);
- backcmd->jp = jp;
-#endif
- }
+/*
+ * Execute a command inside back quotes. If it's a builtin command, we
+ * want to save its output in a block obtained from malloc. Otherwise
+ * we fork off a subprocess and get the output of the command via a pipe.
+ * Should be called with interrupts off.
+ */
+
+static void
+evalbackcmd(union node *n, struct backcmd *result)
+{
+ int pip[2];
+ struct job *jp;
+ struct stackmark smark; /* unnecessary */
+
+ setstackmark(&smark);
+ result->fd = -1;
+ result->buf = NULL;
+ result->nleft = 0;
+ result->jp = NULL;
+ if (n == NULL) {
+ exitstatus = 0;
+ goto out;
+ }
+ exitstatus = 0;
+ if (pipe(pip) < 0)
+ error("Pipe call failed");
+ jp = makejob(n, 1);
+ if (forkshell(jp, n, FORK_NOJOB) == 0) {
+ FORCEINTON;
+ close(pip[0]);
+ if (pip[1] != 1) {
+ close(1);
+ dup_as_newfd(pip[1], 1);
+ close(pip[1]);
+ }
+ eflag = 0;
+ evaltree(n, EV_EXIT);
+ }
+ close(pip[1]);
+ result->fd = pip[0];
+ result->jp = jp;
out:
- if (lastarg)
- setvar("_", lastarg, 0);
popstackmark(&smark);
+ TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n",
+ result->fd, result->buf, result->nleft, result->jp));
}
+/*
+ * Execute a simple command.
+ */
/*
* Search for a command. This is called before we fork so that the
}
-
/*
* Builtin commands. Builtin commands whose functions are closely
* tied to evaluation are implemented here.
}
#endif
+/*
+ * Controls whether the shell is interactive or not.
+ */
+
+static void setsignal(int signo);
+static void chkmail(int silent);
+
+
+static void
+setinteractive(int on)
+{
+ static int is_interactive;
+ static int do_banner=0;
+
+ if (on == is_interactive)
+ return;
+ setsignal(SIGINT);
+ setsignal(SIGQUIT);
+ setsignal(SIGTERM);
+ chkmail(1);
+ is_interactive = on;
+ if (do_banner==0 && is_interactive) {
+ /* Looks like they want an interactive shell */
+ printf( "\n\n" BB_BANNER " Built-in shell (ash)\n");
+ printf( "Enter 'help' for a list of built-in commands.\n\n");
+ do_banner=1;
+ }
+}
+
+static void
+optschanged(void)
+{
+ setinteractive(iflag);
+ setjobctl(mflag);
+}
+
+
static int
execcmd(argc, argv)
int argc;
if (argc > 1) {
struct strlist *sp;
- iflag = 0; /* exit on error */
+ iflag = 0; /* exit on error */
mflag = 0;
optschanged();
for (sp = cmdenviron; sp ; sp = sp->next)
return 0;
}
-static void
-eprintlist(struct strlist *sp)
-{
- for (; sp; sp = sp->next) {
- outfmt(&errout, " %s",sp->text);
- }
-}
-/* $NetBSD: exec.c,v 1.32 2001/02/04 19:52:06 christos Exp $ */
+static void
+eprintlist(struct strlist *sp)
+{
+ for (; sp; sp = sp->next) {
+ out2fmt(" %s",sp->text);
+ }
+}
+
+/*
+ * Exec a program. Never returns. If you change this routine, you may
+ * have to change the find_command routine as well.
+ */
+
+static const char *pathopt; /* set by padvance */
+
+static void
+shellexec(argv, envp, path, idx)
+ char **argv, **envp;
+ const char *path;
+ int idx;
+{
+ char *cmdname;
+ int e;
+
+ if (strchr(argv[0], '/') != NULL) {
+ tryexec(argv[0], argv, envp);
+ e = errno;
+ } else {
+ e = ENOENT;
+ while ((cmdname = padvance(&path, argv[0])) != NULL) {
+ if (--idx < 0 && pathopt == NULL) {
+ tryexec(cmdname, argv, envp);
+ if (errno != ENOENT && errno != ENOTDIR)
+ e = errno;
+ }
+ stunalloc(cmdname);
+ }
+ }
+
+ /* Map to POSIX errors */
+ switch (e) {
+ case EACCES:
+ exerrno = 126;
+ break;
+ case ENOENT:
+ exerrno = 127;
+ break;
+ default:
+ exerrno = 2;
+ break;
+ }
+ exerror(EXEXEC, "%s: %s", argv[0], errmsg(e, E_EXEC));
+ /* NOTREACHED */
+}
+
+/*
+ * Clear traps on a fork.
+ */
+static void
+clear_traps(void) {
+ char **tp;
+
+ for (tp = trap ; tp < &trap[NSIG] ; tp++) {
+ if (*tp && **tp) { /* trap not NULL or SIG_IGN */
+ INTOFF;
+ ckfree(*tp);
+ *tp = NULL;
+ if (tp != &trap[0])
+ setsignal(tp - trap);
+ INTON;
+ }
+ }
+}
+
+
+static void
+initshellproc(void) {
+
+#ifdef ASH_ALIAS
+ /* from alias.c: */
+ {
+ rmaliases();
+ }
+#endif
+ /* from eval.c: */
+ {
+ exitstatus = 0;
+ }
+
+ /* from exec.c: */
+ {
+ deletefuncs();
+ }
+
+ /* from jobs.c: */
+ {
+ backgndpid = -1;
+#ifdef JOBS
+ jobctl = 0;
+#endif
+ }
+
+ /* from options.c: */
+ {
+ int i;
+
+ for (i = 0; i < NOPTS; i++)
+ optent_val(i) = 0;
+ optschanged();
+
+ }
+
+ /* from redir.c: */
+ {
+ clearredir();
+ }
+
+ /* from trap.c: */
+ {
+ char *sm;
+
+ clear_traps();
+ for (sm = sigmode ; sm < sigmode + NSIG - 1; sm++) {
+ if (*sm == S_IGN)
+ *sm = S_HARD_IGN;
+ }
+ }
+
+ /* from var.c: */
+ {
+ shprocvar();
+ }
+}
+
+static int preadbuffer(void);
+static void pushfile (void);
+
+/*
+ * Read a character from the script, returning PEOF on end of file.
+ * Nul characters in the input are silently discarded.
+ */
+
+#ifndef ASH_OPTIMIZE_FOR_SIZE
+#define pgetc_macro() (--parsenleft >= 0? *parsenextc++ : preadbuffer())
+static int
+pgetc(void)
+{
+ return pgetc_macro();
+}
+#else
+static int
+pgetc_macro(void)
+{
+ return --parsenleft >= 0? *parsenextc++ : preadbuffer();
+}
+
+static inline int
+pgetc(void)
+{
+ return pgetc_macro();
+}
+#endif
+
+
+/*
+ * Undo the last call to pgetc. Only one character may be pushed back.
+ * PEOF may be pushed back.
+ */
+
+static void pungetc(void)
+{
+ parsenleft++;
+ parsenextc--;
+}
+
+
+static void
+popfile(void) {
+ struct parsefile *pf = parsefile;
+
+ INTOFF;
+ if (pf->fd >= 0)
+ close(pf->fd);
+ if (pf->buf)
+ ckfree(pf->buf);
+ while (pf->strpush)
+ popstring();
+ parsefile = pf->prev;
+ ckfree(pf);
+ parsenleft = parsefile->nleft;
+ parselleft = parsefile->lleft;
+ parsenextc = parsefile->nextc;
+ plinno = parsefile->linno;
+ INTON;
+}
+
/*
- * When commands are first encountered, they are entered in a hash table.
- * This ensures that a full path search will not have to be done for them
- * on each invocation.
- *
- * We should investigate converting to a linear search, even though that
- * would make the command name "hash" a misnomer.
+ * Return to top level.
*/
-#define CMDTABLESIZE 31 /* should be prime */
-#define ARB 1 /* actual size determined at run time */
-
+static void
+popallfiles(void) {
+ while (parsefile != &basepf)
+ popfile();
+}
-struct tblentry {
- struct tblentry *next; /* next entry in hash chain */
- union param param; /* definition of builtin function */
- short cmdtype; /* index identifying command */
- char rehash; /* if set, cd done since entry created */
- char cmdname[ARB]; /* name of command */
-};
+/*
+ * Close the file(s) that the shell is reading commands from. Called
+ * after a fork is done.
+ */
+static void closescript(void)
+{
+ popallfiles();
+ if (parsefile->fd > 0) {
+ close(parsefile->fd);
+ parsefile->fd = 0;
+ }
+}
-static struct tblentry *cmdtable[CMDTABLESIZE];
-static int builtinloc = -1; /* index in path of %builtin, or -1 */
-static int exerrno = 0; /* Last exec error */
+/*
+ * Like setinputfile, but takes an open file descriptor. Call this with
+ * interrupts off.
+ */
-static void tryexec __P((char *, char **, char **));
-#if !defined(BSD) && !defined(linux)
-static void execinterp __P((char **, char **));
-#endif
-static void printentry __P((struct tblentry *, int));
-static void clearcmdentry __P((int));
-static struct tblentry *cmdlookup __P((char *, int));
-static void delete_cmd_entry __P((void));
-#ifdef ASH_TYPE
-static int describe_command __P((char *, int));
-#endif
-static int path_change __P((const char *, int *));
+static void setinputfd(int fd, int push)
+{
+ (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
+ if (push) {
+ pushfile();
+ parsefile->buf = 0;
+ } else {
+ closescript();
+ while (parsefile->strpush)
+ popstring();
+ }
+ parsefile->fd = fd;
+ if (parsefile->buf == NULL)
+ parsefile->buf = ckmalloc(BUFSIZ);
+ parselleft = parsenleft = 0;
+ plinno = 1;
+}
/*
- * Exec a program. Never returns. If you change this routine, you may
- * have to change the find_command routine as well.
+ * Set the input to take input from a file. If push is set, push the
+ * old input onto the stack first.
*/
static void
-shellexec(argv, envp, path, idx)
- char **argv, **envp;
- const char *path;
- int idx;
+setinputfile(const char *fname, int push)
{
- char *cmdname;
- int e;
-
- if (strchr(argv[0], '/') != NULL) {
- tryexec(argv[0], argv, envp);
- e = errno;
- } else {
- e = ENOENT;
- while ((cmdname = padvance(&path, argv[0])) != NULL) {
- if (--idx < 0 && pathopt == NULL) {
- tryexec(cmdname, argv, envp);
- if (errno != ENOENT && errno != ENOTDIR)
- e = errno;
- }
- stunalloc(cmdname);
- }
- }
+ int fd;
+ int myfileno2;
- /* Map to POSIX errors */
- switch (e) {
- case EACCES:
- exerrno = 126;
- break;
- case ENOENT:
- exerrno = 127;
- break;
- default:
- exerrno = 2;
- break;
+ INTOFF;
+ if ((fd = open(fname, O_RDONLY)) < 0)
+ error("Can't open %s", fname);
+ if (fd < 10) {
+ myfileno2 = dup_as_newfd(fd, 10);
+ close(fd);
+ if (myfileno2 < 0)
+ error("Out of file descriptors");
+ fd = myfileno2;
}
- exerror(EXEXEC, "%s: %s", argv[0], errmsg(e, E_EXEC));
- /* NOTREACHED */
+ setinputfd(fd, push);
+ INTON;
}
static void
-tryexec(cmd, argv, envp)
- char *cmd;
- char **argv;
- char **envp;
- {
+tryexec(char *cmd, char **argv, char **envp)
+{
int e;
-#if !defined(BSD) && !defined(linux)
- char *p;
-#endif
-#ifdef SYSV
- do {
- execve(cmd, argv, envp);
- } while (errno == EINTR);
-#else
- execve(cmd, argv, envp);
+#ifdef BB_FEATURE_SH_STANDALONE_SHELL
+ char *name = cmd;
+ char** argv_l=argv;
+ int argc_l;
+#ifdef BB_FEATURE_SH_APPLETS_ALWAYS_WIN
+ name = get_last_path_component(name);
+#endif
+ argv_l=envp;
+ for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++)
+ putenv(*argv_l);
+ argv_l=argv;
+ for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++)
+ optind = 1;
+ run_applet_by_name(name, argc_l, argv);
#endif
+ execve(cmd, argv, envp);
e = errno;
if (e == ENOEXEC) {
INTOFF;
initshellproc();
setinputfile(cmd, 0);
commandname = arg0 = savestr(argv[0]);
-#if !defined(BSD) && !defined(linux)
- INTON;
- pgetc(); pungetc(); /* fill up input buffer */
- p = parsenextc;
- if (parsenleft > 2 && p[0] == '#' && p[1] == '!') {
- argv[0] = cmd;
- execinterp(argv, envp);
- }
- INTOFF;
-#endif
setparam(argv + 1);
exraise(EXSHELLPROC);
}
errno = e;
}
-
-#if !defined(BSD) && !defined(linux)
-/*
- * Execute an interpreter introduced by "#!", for systems where this
- * feature has not been built into the kernel. If the interpreter is
- * the shell, return (effectively ignoring the "#!"). If the execution
- * of the interpreter fails, exit.
- *
- * This code peeks inside the input buffer in order to avoid actually
- * reading any input. It would benefit from a rewrite.
- */
-
-#define NEWARGS 5
-
-static void
-execinterp(argv, envp)
- char **argv, **envp;
- {
- int n;
- char *inp;
- char *outp;
- char c;
- char *p;
- char **ap;
- char *newargs[NEWARGS];
- int i;
- char **ap2;
- char **new;
-
- n = parsenleft - 2;
- inp = parsenextc + 2;
- ap = newargs;
- for (;;) {
- while (--n >= 0 && (*inp == ' ' || *inp == '\t'))
- inp++;
- if (n < 0)
- goto bad;
- if ((c = *inp++) == '\n')
- break;
- if (ap == &newargs[NEWARGS])
-bad: error("Bad #! line");
- STARTSTACKSTR(outp);
- do {
- STPUTC(c, outp);
- } while (--n >= 0 && (c = *inp++) != ' ' && c != '\t' && c != '\n');
- STPUTC('\0', outp);
- n++, inp--;
- *ap++ = grabstackstr(outp);
- }
- if (ap == newargs + 1) { /* if no args, maybe no exec is needed */
- p = newargs[0];
- for (;;) {
- if (equal(p, "sh") || equal(p, "ash")) {
- return;
- }
- while (*p != '/') {
- if (*p == '\0')
- goto break2;
- p++;
- }
- p++;
- }
-break2:;
- }
- i = (char *)ap - (char *)newargs; /* size in bytes */
- if (i == 0)
- error("Bad #! line");
- for (ap2 = argv ; *ap2++ != NULL ; );
- new = ckmalloc(i + ((char *)ap2 - (char *)argv));
- ap = newargs, ap2 = new;
- while ((i -= sizeof (char **)) >= 0)
- *ap2++ = *ap++;
- ap = argv;
- while (*ap2++ = *ap++);
- shellexec(new, envp, pathval(), 0);
- /* NOTREACHED */
-}
-#endif
-
-
+static char *commandtext (const union node *);
/*
* Do a path search. The variable path (passed by reference) should be
static const char *pathopt;
+static void growstackblock(void);
+
+
static char *
-padvance(path, name)
- const char **path;
- const char *name;
- {
+padvance(const char **path, const char *name)
+{
const char *p;
char *q;
const char *start;
return NULL;
start = *path;
for (p = start ; *p && *p != ':' && *p != '%' ; p++);
- len = p - start + strlen(name) + 2; /* "2" is for '/' and '\0' */
+ len = p - start + strlen(name) + 2; /* "2" is for '/' and '\0' */
while (stackblocksize() < len)
growstackblock();
q = stackblock();
return stalloc(len);
}
+/*
+ * Wrapper around strcmp for qsort/bsearch/...
+ */
+static int
+pstrcmp(const void *a, const void *b)
+{
+ return strcmp((const char *) a, (*(const char *const *) b) + 1);
+}
+
+/*
+ * Find a keyword is in a sorted array.
+ */
+
+static const char *const *
+findkwd(const char *s)
+{
+ return bsearch(s, tokname_array + KWDOFFSET,
+ (sizeof(tokname_array)/sizeof(const char *)) - KWDOFFSET,
+ sizeof(const char *), pstrcmp);
+}
/*** Command hashing code ***/
int verbose;
struct cmdentry entry;
char *name;
+#ifdef ASH_ALIAS
+ const struct alias *ap;
+#endif
verbose = 0;
- while ((c = nextopt("rv")) != '\0') {
+ while ((c = nextopt("rvV")) != '\0') {
if (c == 'r') {
clearcmdentry(0);
return 0;
- } else if (c == 'v') {
- verbose++;
+ } else if (c == 'v' || c == 'V') {
+ verbose = c;
}
}
if (*argptr == NULL) {
return 0;
}
c = 0;
- while ((name = *argptr) != NULL) {
+ while ((name = *argptr++) != NULL) {
if ((cmdp = cmdlookup(name, 0)) != NULL
&& (cmdp->cmdtype == CMDNORMAL
|| (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0)))
delete_cmd_entry();
+#ifdef ASH_ALIAS
+ /* Then look at the aliases */
+ if ((ap = lookupalias(name, 0)) != NULL) {
+ if (verbose=='v')
+ printf("%s is an alias for %s\n", name, ap->val);
+ else
+ printalias(ap);
+ continue;
+ }
+#endif
+ /* First look at the keywords */
+ if (findkwd(name)!=0) {
+ if (verbose=='v')
+ printf("%s is a shell keyword\n", name);
+ else
+ printf(snlfmt, name);
+ continue;
+ }
+
find_command(name, &entry, DO_ERR, pathval());
if (entry.cmdtype == CMDUNKNOWN) c = 1;
else if (verbose) {
cmdp = cmdlookup(name, 0);
- if (cmdp) printentry(cmdp, verbose);
+ if (cmdp) printentry(cmdp, verbose=='v');
flushall();
}
- argptr++;
}
return c;
}
-
static void
printentry(cmdp, verbose)
struct tblentry *cmdp;
const char *path;
char *name;
+ printf("%s%s", cmdp->cmdname, (verbose ? " is " : ""));
if (cmdp->cmdtype == CMDNORMAL) {
idx = cmdp->param.index;
path = pathval();
name = padvance(&path, cmdp->cmdname);
stunalloc(name);
} while (--idx >= 0);
- out1str(name);
+ if(verbose)
+ out1str(name);
} else if (cmdp->cmdtype == CMDBUILTIN) {
- out1fmt("builtin %s", cmdp->cmdname);
+ if(verbose)
+ out1str("a shell builtin");
} else if (cmdp->cmdtype == CMDFUNCTION) {
- out1fmt("function %s", cmdp->cmdname);
if (verbose) {
INTOFF;
+ out1str("a function\n");
name = commandtext(cmdp->param.func);
- out1fmt(" %s", name);
+ printf("%s() {\n %s\n}", cmdp->cmdname, name);
ckfree(name);
INTON;
}
error("internal error: cmdtype %d", cmdp->cmdtype);
#endif
}
- out1fmt(snlfmt, cmdp->rehash ? "*" : nullstr);
+ printf(snlfmt, cmdp->rehash ? "*" : nullstr);
}
+/*** List the available builtins ***/
+
+
+static int helpcmd(int argc, char** argv)
+{
+ int col, i;
+
+ printf("\nBuilt-in commands:\n-------------------\n");
+ for (col=0, i=0; i < NUMBUILTINS; i++) {
+ col += printf("%c%s", ((col == 0) ? '\t' : ' '),
+ builtincmds[i].name+1);
+ if (col > 60) {
+ printf("\n");
+ col = 0;
+ }
+ }
+#ifdef BB_FEATURE_SH_STANDALONE_SHELL
+ {
+ extern const struct BB_applet applets[];
+ extern const size_t NUM_APPLETS;
+
+ for (i=0; i < NUM_APPLETS; i++) {
+
+ col += printf("%c%s", ((col == 0) ? '\t' : ' '),
+ applets[i].name);
+ if (col > 60) {
+ printf("\n");
+ col = 0;
+ }
+ }
+ }
+#endif
+ printf("\n\n");
+ return EXIT_SUCCESS;
+}
+
/*
* Resolve a command name. If you change this routine, you may have to
* change the shellexec routine as well.
*/
+static int prefix (const char *, const char *);
+
static void
-find_command(name, entry, act, path)
- char *name;
- struct cmdentry *entry;
- int act;
- const char *path;
+find_command(const char *name, struct cmdentry *entry, int act, const char *path)
{
struct tblentry *cmdp;
int idx;
int bltin;
int firstchange;
int updatetbl;
- bool regular;
+ int regular;
struct builtincmd *bcmd;
/* If name contains a slash, don't use the hash table */
if (strchr(name, '/') != NULL) {
if (act & DO_ABS) {
while (stat(name, &statb) < 0) {
- #ifdef SYSV
- if (errno == EINTR)
- continue;
- #endif
if (errno != ENOENT && errno != ENOTDIR)
e = errno;
entry->cmdtype = CMDUNKNOWN;
}
bcmd = find_builtin(name);
- regular = bcmd && bcmd->flags & BUILTIN_REGULAR;
+ regular = bcmd && IS_BUILTIN_REGULAR(bcmd);
if (regular) {
if (cmdp && (cmdp->cmdtype == CMDBUILTIN)) {
- goto success;
+ goto success;
}
} else if (act & DO_BRUTE) {
if (firstchange == 0) {
}
/* We have to search path. */
- prev = -1; /* where to start */
- if (cmdp && cmdp->rehash) { /* doing a rehash */
+ prev = -1; /* where to start */
+ if (cmdp && cmdp->rehash) { /* doing a rehash */
if (cmdp->cmdtype == CMDBUILTIN)
prev = builtinloc;
else
prefix("func", pathopt)) {
/* handled below */
} else {
- continue; /* ignore unimplemented options */
+ continue; /* ignore unimplemented options */
}
}
/* if rehash, don't redo absolute path names */
goto success;
}
while (stat(fullname, &statb) < 0) {
-#ifdef SYSV
- if (errno == EINTR)
- continue;
-#endif
if (errno != ENOENT && errno != ENOTDIR)
e = errno;
goto loop;
}
- e = EACCES; /* if we fail, this will be the error */
+ e = EACCES; /* if we fail, this will be the error */
if (!S_ISREG(statb.st_mode))
continue;
- if (pathopt) { /* this is a %func directory */
+ if (pathopt) { /* this is a %func directory */
stalloc(strlen(fullname) + 1);
readcmdfile(fullname);
if ((cmdp = cmdlookup(name, 0)) == NULL || cmdp->cmdtype != CMDFUNCTION)
stunalloc(fullname);
goto success;
}
-#ifdef notdef
- if (statb.st_uid == geteuid()) {
- if ((statb.st_mode & 0100) == 0)
- goto loop;
- } else if (statb.st_gid == getegid()) {
- if ((statb.st_mode & 010) == 0)
- goto loop;
- } else {
- if ((statb.st_mode & 01) == 0)
- goto loop;
- }
-#endif
TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
/* If we aren't called with DO_BRUTE and cmdp is set, it must
be a function and we're being called with DO_NOFUN */
if (cmdp && updatetbl)
delete_cmd_entry();
if (act & DO_ERR)
- outfmt(out2, "%s: %s\n", name, errmsg(e, E_EXEC));
+ out2fmt("%s: %s\n", name, errmsg(e, E_EXEC));
entry->cmdtype = CMDUNKNOWN;
return;
* Search the table of builtin commands.
*/
-struct builtincmd *
-find_builtin(name)
- char *name;
+static int
+bstrcmp(const void *name, const void *b)
+{
+ return strcmp((const char *)name, (*(const char *const *) b)+1);
+}
+
+static struct builtincmd *
+find_builtin(const char *name)
{
struct builtincmd *bp;
- bp = bsearch( &name, builtincmds, NUMBUILTINS, sizeof(struct builtincmd),
- pstrcmp
+ bp = bsearch(name, builtincmds, NUMBUILTINS, sizeof(struct builtincmd),
+ bstrcmp
);
return bp;
}
*/
static void
-hashcd() {
+hashcd(void) {
struct tblentry **pp;
struct tblentry *cmdp;
*/
static void
-changepath(newval)
- const char *newval;
+changepath(const char *newval)
{
int firstchange;
int bltin;
firstchange = path_change(newval, &bltin);
if (builtinloc < 0 && bltin >= 0)
- builtinloc = bltin; /* zap builtins */
+ builtinloc = bltin; /* zap builtins */
clearcmdentry(firstchange);
builtinloc = bltin;
}
* Delete all functions.
*/
-#ifdef mkinit
-static void deletefuncs __P((void));
-
-SHELLPROC {
- deletefuncs();
-}
-#endif
-
static void
-deletefuncs() {
+deletefuncs(void) {
struct tblentry **tblp;
struct tblentry **pp;
struct tblentry *cmdp;
* entry.
*/
-struct tblentry **lastcmdentry;
-
+static struct tblentry **lastcmdentry;
static struct tblentry *
-cmdlookup(name, add)
- char *name;
- int add;
+cmdlookup(const char *name, int add)
{
int hashval;
- char *p;
+ const char *p;
struct tblentry *cmdp;
struct tblentry **pp;
*/
static void
-delete_cmd_entry() {
- struct tblentry *cmdp;
-
- INTOFF;
- cmdp = *lastcmdentry;
- *lastcmdentry = cmdp->next;
- ckfree(cmdp);
- INTON;
-}
-
-
-
-#ifdef notdef
-static void
-getcmdentry(name, entry)
- char *name;
- struct cmdentry *entry;
- {
- struct tblentry *cmdp = cmdlookup(name, 0);
-
- if (cmdp) {
- entry->u = cmdp->param;
- entry->cmdtype = cmdp->cmdtype;
- } else {
- entry->cmdtype = CMDUNKNOWN;
- entry->u.index = 0;
- }
-}
-#endif
-
-
-/*
- * Add a new command entry, replacing any existing command entry for
- * the same name.
- */
-
-static void
-addcmdentry(name, entry)
- char *name;
- struct cmdentry *entry;
- {
+delete_cmd_entry() {
struct tblentry *cmdp;
INTOFF;
- cmdp = cmdlookup(name, 1);
- if (cmdp->cmdtype == CMDFUNCTION) {
- freefunc(cmdp->param.func);
- }
- cmdp->cmdtype = entry->cmdtype;
- cmdp->param = entry->u;
+ cmdp = *lastcmdentry;
+ *lastcmdentry = cmdp->next;
+ ckfree(cmdp);
INTON;
}
-/*
- * Define a shell function.
- */
-static void
-defun(name, func)
- char *name;
- union node *func;
- {
- struct cmdentry entry;
- entry.cmdtype = CMDFUNCTION;
- entry.u.func = copyfunc(func);
- addcmdentry(name, &entry);
-}
+
+static const unsigned char nodesize[26] = {
+ ALIGN(sizeof (struct nbinary)),
+ ALIGN(sizeof (struct ncmd)),
+ ALIGN(sizeof (struct npipe)),
+ ALIGN(sizeof (struct nredir)),
+ ALIGN(sizeof (struct nredir)),
+ ALIGN(sizeof (struct nredir)),
+ ALIGN(sizeof (struct nbinary)),
+ ALIGN(sizeof (struct nbinary)),
+ ALIGN(sizeof (struct nif)),
+ ALIGN(sizeof (struct nbinary)),
+ ALIGN(sizeof (struct nbinary)),
+ ALIGN(sizeof (struct nfor)),
+ ALIGN(sizeof (struct ncase)),
+ ALIGN(sizeof (struct nclist)),
+ ALIGN(sizeof (struct narg)),
+ ALIGN(sizeof (struct narg)),
+ ALIGN(sizeof (struct nfile)),
+ ALIGN(sizeof (struct nfile)),
+ ALIGN(sizeof (struct nfile)),
+ ALIGN(sizeof (struct nfile)),
+ ALIGN(sizeof (struct nfile)),
+ ALIGN(sizeof (struct ndup)),
+ ALIGN(sizeof (struct ndup)),
+ ALIGN(sizeof (struct nhere)),
+ ALIGN(sizeof (struct nhere)),
+ ALIGN(sizeof (struct nnot)),
+};
+
/*
*/
static void
-unsetfunc(name)
- char *name;
- {
+unsetfunc(char *name)
+{
struct tblentry *cmdp;
if ((cmdp = cmdlookup(name, 0)) != NULL && cmdp->cmdtype == CMDFUNCTION) {
}
}
-#ifdef ASH_TYPE
+
/*
* Locate and print what a word is...
*/
static int
-typecmd(argc, argv)
- int argc;
- char **argv;
+typecmd(int argc, char **argv)
{
int i;
int err = 0;
+ char *argv_a[2];
+
+ argv_a[1] = 0;
for (i = 1; i < argc; i++) {
- err |= describe_command(argv[i], 1);
+ argv_a[0] = argv[i];
+ argptr = argv_a;
+ optptr = "v";
+ err |= hashcmd(argc, argv);
}
return err;
}
-static int
-describe_command(command, verbose)
- char *command;
- int verbose;
-{
- struct cmdentry entry;
- struct tblentry *cmdp;
- const struct alias *ap;
- const char *path = pathval();
-
- if (verbose) {
- out1str(command);
- }
-
- /* First look at the keywords */
- if (findkwd(command)) {
- out1str(verbose ? " is a shell keyword" : command);
- goto out;
- }
-
- /* Then look at the aliases */
- if ((ap = lookupalias(command, 0)) != NULL) {
- if (verbose) {
- out1fmt(" is an alias for %s", ap->val);
- } else {
- printalias(ap);
- }
- goto out;
- }
-
- /* Then check if it is a tracked alias */
- if ((cmdp = cmdlookup(command, 0)) != NULL) {
- entry.cmdtype = cmdp->cmdtype;
- entry.u = cmdp->param;
- } else {
- /* Finally use brute force */
- find_command(command, &entry, DO_ABS, path);
- }
-
- switch (entry.cmdtype) {
- case CMDNORMAL: {
- int j = entry.u.index;
- char *p;
- if (j == -1) {
- p = command;
- } else {
- do {
- p = padvance(&path, command);
- stunalloc(p);
- } while (--j >= 0);
- }
- if (verbose) {
- out1fmt(
- " is%s %s",
- cmdp ? " a tracked alias for" : nullstr, p
- );
- } else {
- out1str(p);
- }
- break;
- }
-
- case CMDFUNCTION:
- if (verbose) {
- out1str(" is a shell function");
- } else {
- out1str(command);
- }
- break;
-
- case CMDBUILTIN:
- if (verbose) {
- out1fmt(
- " is a %sshell builtin",
- entry.u.cmd->flags & BUILTIN_SPECIAL ?
- "special " : nullstr
- );
- } else {
- out1str(command);
- }
- break;
-
- default:
- if (verbose) {
- out1str(": not found\n");
- }
- return 127;
- }
-
-out:
- out1c('\n');
- return 0;
-}
-#endif
-
+#ifdef ASH_CMDCMD
static int
commandcmd(argc, argv)
int argc;
case 'V':
verbose_verify_only = 1;
break;
- default:
- outfmt(out2,
-"command: nextopt returned character code 0%o\n", c);
- return EX_SOFTWARE;
}
if (default_path + verify_only + verbose_verify_only > 1 ||
!*argptr) {
- outfmt(out2,
-"command [-p] command [arg ...]\n");
- outfmt(out2,
-"command {-v|-V} command\n");
+ out2str(
+ "command [-p] command [arg ...]\n"
+ "command {-v|-V} command\n");
return EX_USAGE;
}
-#ifdef ASH_TYPE
if (verify_only || verbose_verify_only) {
- return describe_command(*argptr, verbose_verify_only);
+ char *argv_a[2];
+
+ argv_a[1] = 0;
+ argv_a[0] = *argptr;
+ argptr = argv_a;
+ optptr = verbose_verify_only ? "v" : "V"; /* reverse special */
+ return hashcmd(argc, argv);
}
-#endif
return 0;
}
+#endif
static int
path_change(newval, bltin)
old = pathval();
new = newval;
- firstchange = 9999; /* assume no change */
+ firstchange = 9999; /* assume no change */
idx = 0;
*bltin = -1;
for (;;) {
if ((*old == '\0' && *new == ':')
|| (*old == ':' && *new == '\0'))
firstchange++;
- old = new; /* ignore subsequent differences */
+ old = new; /* ignore subsequent differences */
}
if (*new == '\0')
break;
firstchange = 0;
return firstchange;
}
-/* $NetBSD: expand.c,v 1.50 2001/02/04 19:52:06 christos Exp $ */
-
/*
* Routines to expand arguments to commands. We have to deal with
* backquotes, shell variables, and file metacharacters.
/*
* _rmescape() flags
*/
-#define RMESCAPE_ALLOC 0x1 /* Allocate a new string */
-#define RMESCAPE_GLOB 0x2 /* Add backslashes for glob */
+#define RMESCAPE_ALLOC 0x1 /* Allocate a new string */
+#define RMESCAPE_GLOB 0x2 /* Add backslashes for glob */
/*
* Structure specifying which parts of the string should be searched
*/
struct ifsregion {
- struct ifsregion *next; /* next region in list */
- int begoff; /* offset of start of region */
- int endoff; /* offset of end of region */
- int nulonly; /* search for nul bytes only */
+ struct ifsregion *next; /* next region in list */
+ int begoff; /* offset of start of region */
+ int endoff; /* offset of end of region */
+ int nulonly; /* search for nul bytes only */
};
-static char *expdest; /* output of current string */
-struct nodelist *argbackq; /* list of back quote expressions */
-struct ifsregion ifsfirst; /* first struct in list of ifs regions */
-struct ifsregion *ifslastp; /* last struct in list */
-struct arglist exparg; /* holds expanded arg list */
-
-static void argstr __P((char *, int));
-static char *exptilde __P((char *, int));
-static void expbackq __P((union node *, int, int));
-static int subevalvar __P((char *, char *, int, int, int, int, int));
-static char *evalvar __P((char *, int));
-static int varisset __P((char *, int));
-static void strtodest __P((const char *, const char *, int));
-static void varvalue __P((char *, int, int));
-static void recordregion __P((int, int, int));
-static void removerecordregions __P((int));
-static void ifsbreakup __P((char *, struct arglist *));
-static void ifsfree __P((void));
-static void expandmeta __P((struct strlist *, int));
-#if defined(__GLIBC__) && !defined(FNMATCH_BROKEN)
+static char *expdest; /* output of current string */
+static struct nodelist *argbackq; /* list of back quote expressions */
+static struct ifsregion ifsfirst; /* first struct in list of ifs regions */
+static struct ifsregion *ifslastp; /* last struct in list */
+static struct arglist exparg; /* holds expanded arg list */
+
+static void argstr (char *, int);
+static char *exptilde (char *, int);
+static void expbackq (union node *, int, int);
+static int subevalvar (char *, char *, int, int, int, int, int);
+static int varisset (char *, int);
+static void strtodest (const char *, int, int);
+static void varvalue (char *, int, int);
+static void recordregion (int, int, int);
+static void removerecordregions (int);
+static void ifsbreakup (char *, struct arglist *);
+static void ifsfree (void);
+static void expandmeta (struct strlist *, int);
+#if defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN)
#define preglob(p) _rmescapes((p), RMESCAPE_ALLOC | RMESCAPE_GLOB)
#if !defined(GLOB_BROKEN)
-static void addglob __P((const glob_t *));
+static void addglob (const glob_t *);
#endif
#endif
-#if !(defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN))
-static void expmeta __P((char *, char *));
+#if !(defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN))
+static void expmeta (char *, char *);
#endif
-static void addfname __P((char *));
-#if !(defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN))
-static struct strlist *expsort __P((struct strlist *));
-static struct strlist *msort __P((struct strlist *, int));
+#if !(defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN))
+static struct strlist *expsort (struct strlist *);
+static struct strlist *msort (struct strlist *, int);
#endif
-#if defined(__GLIBC__) && !defined(FNMATCH_BROKEN)
-static int patmatch __P((char *, char *, int));
-static int patmatch2 __P((char *, char *, int));
+static int patmatch (char *, char *, int);
+#if defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN)
+static int patmatch2 (char *, char *, int);
#else
-static int pmatch __P((char *, char *, int));
+static int pmatch (char *, char *, int);
#define patmatch2 patmatch
#endif
-static char *cvtnum __P((int, char *));
-
-extern int oexitstatus;
+static char *cvtnum (int, char *);
/*
* Expand shell variables and backquotes inside a here document.
*/
-static void
-expandhere(arg, fd)
- union node *arg; /* the document */
- int fd; /* where to write the expanded version */
- {
+/* arg: the document, fd: where to write the expanded version */
+static inline void
+expandhere(union node *arg, int fd)
+{
herefd = fd;
expandarg(arg, (struct arglist *)NULL, 0);
xwrite(fd, stackblock(), expdest - stackblock());
}
-/*
- * Perform variable substitution and command substitution on an argument,
- * placing the resulting list of arguments in arglist. If EXP_FULL is true,
- * perform splitting and file name expansion. When arglist is NULL, perform
- * here document expansion.
- */
+/*
+ * Perform variable substitution and command substitution on an argument,
+ * placing the resulting list of arguments in arglist. If EXP_FULL is true,
+ * perform splitting and file name expansion. When arglist is NULL, perform
+ * here document expansion.
+ */
+
+static void
+expandarg(arg, arglist, flag)
+ union node *arg;
+ struct arglist *arglist;
+ int flag;
+{
+ struct strlist *sp;
+ char *p;
+
+ argbackq = arg->narg.backquote;
+ STARTSTACKSTR(expdest);
+ ifsfirst.next = NULL;
+ ifslastp = NULL;
+ argstr(arg->narg.text, flag);
+ if (arglist == NULL) {
+ return; /* here document expanded */
+ }
+ STPUTC('\0', expdest);
+ p = grabstackstr(expdest);
+ exparg.lastp = &exparg.list;
+ /*
+ * TODO - EXP_REDIR
+ */
+ if (flag & EXP_FULL) {
+ ifsbreakup(p, &exparg);
+ *exparg.lastp = NULL;
+ exparg.lastp = &exparg.list;
+ expandmeta(exparg.list, flag);
+ } else {
+ if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */
+ rmescapes(p);
+ sp = (struct strlist *)stalloc(sizeof (struct strlist));
+ sp->text = p;
+ *exparg.lastp = sp;
+ exparg.lastp = &sp->next;
+ }
+ ifsfree();
+ *exparg.lastp = NULL;
+ if (exparg.list) {
+ *arglist->lastp = exparg.list;
+ arglist->lastp = exparg.lastp;
+ }
+}
+
+
+/*
+ * Expand a variable, and return a pointer to the next character in the
+ * input string.
+ */
+
+static inline char * evalvar(char *p, int flag)
+{
+ int subtype;
+ int varflags;
+ char *var;
+ const char *val;
+ int patloc;
+ int c;
+ int set;
+ int special;
+ int startloc;
+ int varlen;
+ int easy;
+ int quotes = flag & (EXP_FULL | EXP_CASE);
+
+ varflags = *p++;
+ subtype = varflags & VSTYPE;
+ var = p;
+ special = 0;
+ if (! is_name(*p))
+ special = 1;
+ p = strchr(p, '=') + 1;
+again: /* jump here after setting a variable with ${var=text} */
+ if (special) {
+ set = varisset(var, varflags & VSNUL);
+ val = NULL;
+ } else {
+ val = lookupvar(var);
+ if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
+ val = NULL;
+ set = 0;
+ } else
+ set = 1;
+ }
+ varlen = 0;
+ startloc = expdest - stackblock();
+ if (set && subtype != VSPLUS) {
+ /* insert the value of the variable */
+ if (special) {
+ varvalue(var, varflags & VSQUOTE, flag);
+ if (subtype == VSLENGTH) {
+ varlen = expdest - stackblock() - startloc;
+ STADJUST(-varlen, expdest);
+ }
+ } else {
+ if (subtype == VSLENGTH) {
+ varlen = strlen(val);
+ } else {
+ strtodest(
+ val,
+ varflags & VSQUOTE ?
+ DQSYNTAX : BASESYNTAX,
+ quotes
+ );
+ }
+ }
+ }
+
+ if (subtype == VSPLUS)
+ set = ! set;
+
+ easy = ((varflags & VSQUOTE) == 0 ||
+ (*var == '@' && shellparam.nparam != 1));
+
+
+ switch (subtype) {
+ case VSLENGTH:
+ expdest = cvtnum(varlen, expdest);
+ goto record;
+
+ case VSNORMAL:
+ if (!easy)
+ break;
+record:
+ recordregion(startloc, expdest - stackblock(),
+ varflags & VSQUOTE);
+ break;
+
+ case VSPLUS:
+ case VSMINUS:
+ if (!set) {
+ argstr(p, flag);
+ break;
+ }
+ if (easy)
+ goto record;
+ break;
+
+ case VSTRIMLEFT:
+ case VSTRIMLEFTMAX:
+ case VSTRIMRIGHT:
+ case VSTRIMRIGHTMAX:
+ if (!set)
+ break;
+ /*
+ * Terminate the string and start recording the pattern
+ * right after it
+ */
+ STPUTC('\0', expdest);
+ patloc = expdest - stackblock();
+ if (subevalvar(p, NULL, patloc, subtype,
+ startloc, varflags, quotes) == 0) {
+ int amount = (expdest - stackblock() - patloc) + 1;
+ STADJUST(-amount, expdest);
+ }
+ /* Remove any recorded regions beyond start of variable */
+ removerecordregions(startloc);
+ goto record;
-static void
-expandarg(arg, arglist, flag)
- union node *arg;
- struct arglist *arglist;
- int flag;
-{
- struct strlist *sp;
- char *p;
+ case VSASSIGN:
+ case VSQUESTION:
+ if (!set) {
+ if (subevalvar(p, var, 0, subtype, startloc,
+ varflags, quotes)) {
+ varflags &= ~VSNUL;
+ /*
+ * Remove any recorded regions beyond
+ * start of variable
+ */
+ removerecordregions(startloc);
+ goto again;
+ }
+ break;
+ }
+ if (easy)
+ goto record;
+ break;
- argbackq = arg->narg.backquote;
- STARTSTACKSTR(expdest);
- ifsfirst.next = NULL;
- ifslastp = NULL;
- argstr(arg->narg.text, flag);
- if (arglist == NULL) {
- return; /* here document expanded */
- }
- STPUTC('\0', expdest);
- p = grabstackstr(expdest);
- exparg.lastp = &exparg.list;
- /*
- * TODO - EXP_REDIR
- */
- if (flag & EXP_FULL) {
- ifsbreakup(p, &exparg);
- *exparg.lastp = NULL;
- exparg.lastp = &exparg.list;
- expandmeta(exparg.list, flag);
- } else {
- if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */
- rmescapes(p);
- sp = (struct strlist *)stalloc(sizeof (struct strlist));
- sp->text = p;
- *exparg.lastp = sp;
- exparg.lastp = &sp->next;
+#ifdef DEBUG
+ default:
+ abort();
+#endif
}
- ifsfree();
- *exparg.lastp = NULL;
- if (exparg.list) {
- *arglist->lastp = exparg.list;
- arglist->lastp = exparg.lastp;
+
+ if (subtype != VSNORMAL) { /* skip to end of alternative */
+ int nesting = 1;
+ for (;;) {
+ if ((c = *p++) == CTLESC)
+ p++;
+ else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) {
+ if (set)
+ argbackq = argbackq->next;
+ } else if (c == CTLVAR) {
+ if ((*p++ & VSTYPE) != VSNORMAL)
+ nesting++;
+ } else if (c == CTLENDVAR) {
+ if (--nesting == 0)
+ break;
+ }
+ }
}
+ return p;
}
-
/*
* Perform variable and command substitution. If EXP_FULL is set, output CTLESC
* characters to allow for further processing. Otherwise treat
int flag;
{
char c;
- int quotes = flag & (EXP_FULL | EXP_CASE); /* do CTLESC */
+ int quotes = flag & (EXP_FULL | EXP_CASE); /* do CTLESC */
int firsteq = 1;
if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE)))
case CTLENDARI:
expari(flag);
break;
-#endif
+#endif
case ':':
case '=':
/*
}
-static void
-removerecordregions(endoff)
- int endoff;
+static void
+removerecordregions(int endoff)
{
if (ifslastp == NULL)
return;
}
return;
}
-
+
ifslastp = &ifsfirst;
while (ifslastp->next && ifslastp->next->begoff < endoff)
ifslastp=ifslastp->next;
* evaluate, place result in (backed up) result, adjust string position.
*/
static void
-expari(flag)
- int flag;
+expari(int flag)
{
char *p, *start;
+ int errcode;
int result;
int begoff;
int quotes = flag & (EXP_FULL | EXP_CASE);
int quoted;
- /* ifsfree(); */
+ /* ifsfree(); */
/*
* This routine is slightly over-complicated for
removerecordregions(begoff);
if (quotes)
rmescapes(p+2);
- result = arith(p+2);
- fmtstr(p, 12, "%d", result);
+ result = arith(p+2, &errcode);
+ if (errcode < 0) {
+ if(errcode == -2)
+ error("divide by zero");
+ else
+ error("syntax error: \"%s\"\n", p+2);
+ }
+ snprintf(p, 12, "%d", result);
while (*p++)
;
result = expdest - p + 1;
STADJUST(-result, expdest);
}
-#endif
-
+#endif
/*
* Expand stuff in backwards quotes.
struct nodelist *volatile saveargbackq;
char lastc;
int startloc = dest - stackblock();
- char const *syntax = quoted? DQSYNTAX : BASESYNTAX;
+ int syntax = quoted ? DQSYNTAX : BASESYNTAX;
volatile int saveherefd;
int quotes = flag & (EXP_FULL | EXP_CASE);
struct jmploc jmploc;
if (--in.nleft < 0) {
if (in.fd < 0)
break;
- while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR);
+ i = safe_read(in.fd, buf, sizeof buf);
TRACE(("expbackq: read returns %d\n", i));
if (i <= 0)
break;
}
lastc = *p++;
if (lastc != '\0') {
- if (quotes && syntax[(int)lastc] == CCTL)
+ if (quotes && SIT(lastc, syntax) == CCTL)
STPUTC(CTLESC, dest);
STPUTC(lastc, dest);
}
INTON;
}
-
-
static int
subevalvar(p, str, strloc, subtype, startloc, varflags, quotes)
char *p;
case VSQUESTION:
if (*p != CTLENDVAR) {
- outfmt(&errout, snlfmt, startp);
+ out2fmt(snlfmt, startp);
error((char *)NULL);
}
error("%.*s: parameter %snot set", p - str - 1,
goto recordleft;
*loc = c;
if (quotes && *loc == CTLESC)
- loc++;
+ loc++;
}
return 0;
goto recordleft;
*loc = c;
loc--;
- if (quotes && loc > startp && *(loc - 1) == CTLESC) {
- for (q = startp; q < loc; q++)
- if (*q == CTLESC)
- q++;
- if (q > loc)
- loc--;
- }
- }
- return 0;
-
- case VSTRIMRIGHT:
- for (loc = str - 1; loc >= startp;) {
- if (patmatch2(str, loc, quotes))
- goto recordright;
- loc--;
- if (quotes && loc > startp && *(loc - 1) == CTLESC) {
- for (q = startp; q < loc; q++)
- if (*q == CTLESC)
- q++;
- if (q > loc)
- loc--;
- }
- }
- return 0;
-
- case VSTRIMRIGHTMAX:
- for (loc = startp; loc < str - 1; loc++) {
- if (patmatch2(str, loc, quotes))
- goto recordright;
- if (quotes && *loc == CTLESC)
- loc++;
- }
- return 0;
-
-#ifdef DEBUG
- default:
- abort();
-#endif
- }
-
-recordleft:
- *loc = c;
- amount = ((str - 1) - (loc - startp)) - expdest;
- STADJUST(amount, expdest);
- while (loc != str - 1)
- *startp++ = *loc++;
- return 1;
-
-recordright:
- amount = loc - expdest;
- STADJUST(amount, expdest);
- STPUTC('\0', expdest);
- STADJUST(-1, expdest);
- return 1;
-}
-
-
-/*
- * Expand a variable, and return a pointer to the next character in the
- * input string.
- */
-
-static char *
-evalvar(p, flag)
- char *p;
- int flag;
-{
- int subtype;
- int varflags;
- char *var;
- char *val;
- int patloc;
- int c;
- int set;
- int special;
- int startloc;
- int varlen;
- int easy;
- int quotes = flag & (EXP_FULL | EXP_CASE);
-
- varflags = *p++;
- subtype = varflags & VSTYPE;
- var = p;
- special = 0;
- if (! is_name(*p))
- special = 1;
- p = strchr(p, '=') + 1;
-again: /* jump here after setting a variable with ${var=text} */
- if (special) {
- set = varisset(var, varflags & VSNUL);
- val = NULL;
- } else {
- val = lookupvar(var);
- if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
- val = NULL;
- set = 0;
- } else
- set = 1;
- }
- varlen = 0;
- startloc = expdest - stackblock();
- if (set && subtype != VSPLUS) {
- /* insert the value of the variable */
- if (special) {
- varvalue(var, varflags & VSQUOTE, flag);
- if (subtype == VSLENGTH) {
- varlen = expdest - stackblock() - startloc;
- STADJUST(-varlen, expdest);
- }
- } else {
- if (subtype == VSLENGTH) {
- varlen = strlen(val);
- } else {
- strtodest(
- val,
- varflags & VSQUOTE ?
- DQSYNTAX : BASESYNTAX,
- quotes
- );
- }
- }
- }
-
- if (subtype == VSPLUS)
- set = ! set;
-
- easy = ((varflags & VSQUOTE) == 0 ||
- (*var == '@' && shellparam.nparam != 1));
-
-
- switch (subtype) {
- case VSLENGTH:
- expdest = cvtnum(varlen, expdest);
- goto record;
-
- case VSNORMAL:
- if (!easy)
- break;
-record:
- recordregion(startloc, expdest - stackblock(),
- varflags & VSQUOTE);
- break;
-
- case VSPLUS:
- case VSMINUS:
- if (!set) {
- argstr(p, flag);
- break;
+ if (quotes && loc > startp && *(loc - 1) == CTLESC) {
+ for (q = startp; q < loc; q++)
+ if (*q == CTLESC)
+ q++;
+ if (q > loc)
+ loc--;
+ }
}
- if (easy)
- goto record;
- break;
+ return 0;
- case VSTRIMLEFT:
- case VSTRIMLEFTMAX:
case VSTRIMRIGHT:
- case VSTRIMRIGHTMAX:
- if (!set)
- break;
- /*
- * Terminate the string and start recording the pattern
- * right after it
- */
- STPUTC('\0', expdest);
- patloc = expdest - stackblock();
- if (subevalvar(p, NULL, patloc, subtype,
- startloc, varflags, quotes) == 0) {
- int amount = (expdest - stackblock() - patloc) + 1;
- STADJUST(-amount, expdest);
+ for (loc = str - 1; loc >= startp;) {
+ if (patmatch2(str, loc, quotes))
+ goto recordright;
+ loc--;
+ if (quotes && loc > startp && *(loc - 1) == CTLESC) {
+ for (q = startp; q < loc; q++)
+ if (*q == CTLESC)
+ q++;
+ if (q > loc)
+ loc--;
+ }
}
- /* Remove any recorded regions beyond start of variable */
- removerecordregions(startloc);
- goto record;
+ return 0;
- case VSASSIGN:
- case VSQUESTION:
- if (!set) {
- if (subevalvar(p, var, 0, subtype, startloc,
- varflags, quotes)) {
- varflags &= ~VSNUL;
- /*
- * Remove any recorded regions beyond
- * start of variable
- */
- removerecordregions(startloc);
- goto again;
- }
- break;
+ case VSTRIMRIGHTMAX:
+ for (loc = startp; loc < str - 1; loc++) {
+ if (patmatch2(str, loc, quotes))
+ goto recordright;
+ if (quotes && *loc == CTLESC)
+ loc++;
}
- if (easy)
- goto record;
- break;
+ return 0;
#ifdef DEBUG
default:
#endif
}
- if (subtype != VSNORMAL) { /* skip to end of alternative */
- int nesting = 1;
- for (;;) {
- if ((c = *p++) == CTLESC)
- p++;
- else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) {
- if (set)
- argbackq = argbackq->next;
- } else if (c == CTLVAR) {
- if ((*p++ & VSTYPE) != VSNORMAL)
- nesting++;
- } else if (c == CTLENDVAR) {
- if (--nesting == 0)
- break;
- }
- }
- }
- return p;
-}
+recordleft:
+ *loc = c;
+ amount = ((str - 1) - (loc - startp)) - expdest;
+ STADJUST(amount, expdest);
+ while (loc != str - 1)
+ *startp++ = *loc++;
+ return 1;
+recordright:
+ amount = loc - expdest;
+ STADJUST(amount, expdest);
+ STPUTC('\0', expdest);
+ STADJUST(-1, expdest);
+ return 1;
+}
/*
return 1;
}
-
-
/*
* Put a string on the stack.
*/
static void
-strtodest(p, syntax, quotes)
- const char *p;
- const char *syntax;
- int quotes;
+strtodest(const char *p, int syntax, int quotes)
{
while (*p) {
- if (quotes && syntax[(int) *p] == CCTL)
+ if (quotes && SIT(*p,syntax) == CCTL)
STPUTC(CTLESC, expdest);
STPUTC(*p++, expdest);
}
}
-
-
/*
* Add the value of a specialized variable to the stack string.
*/
static void
-varvalue(name, quoted, flags)
- char *name;
- int quoted;
- int flags;
+varvalue(char *name, int quoted, int flags)
{
int num;
char *p;
int sep;
int sepq = 0;
char **ap;
- char const *syntax;
+ int syntax;
int allow_split = flags & EXP_FULL;
int quotes = flags & (EXP_FULL | EXP_CASE);
break;
case '-':
for (i = 0 ; i < NOPTS ; i++) {
- if (optlist[i].val)
- STPUTC(optlist[i].letter, expdest);
+ if (optent_val(i))
+ STPUTC(optent_letter(optlist[i]), expdest);
}
break;
case '@':
case '*':
sep = ifsset() ? ifsval()[0] : ' ';
if (quotes) {
- sepq = syntax[(int) sep] == CCTL;
+ sepq = SIT(sep,syntax) == CCTL;
}
param:
for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
}
-
/*
* Record the fact that we have to scan this region of the
* string for IFS characters.
ifsfirst.next = NULL;
}
+/*
+ * Add a file name to the list.
+ */
+
+static void
+addfname(const char *name)
+{
+ char *p;
+ struct strlist *sp;
+ p = sstrdup(name);
+ sp = (struct strlist *)stalloc(sizeof *sp);
+ sp->text = p;
+ *exparg.lastp = sp;
+ exparg.lastp = &sp->next;
+}
/*
* Expand shell metacharacters. At this point, the only control characters
* should be escapes. The results are stored in the list exparg.
*/
-#if defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN)
+#if defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN)
static void
expandmeta(str, flag)
struct strlist *str;
goto nometa;
p = preglob(str->text);
INTOFF;
- switch (glob(p, GLOB_NOMAGIC, 0, &pglob)) {
+ switch (glob(p, 0, 0, &pglob)) {
case 0:
- if (!(pglob.gl_flags & GLOB_MAGCHAR))
+ if(pglob.gl_pathv[1]==0 && !strcmp(p, pglob.gl_pathv[0]))
goto nometa2;
addglob(&pglob);
globfree(&pglob);
rmescapes(str->text);
exparg.lastp = &str->next;
break;
- default: /* GLOB_NOSPACE */
+ default: /* GLOB_NOSPACE */
error("Out of space");
}
str = str->next;
}
-#else /* defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN) */
+#else /* defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN) */
static char *expdir;
if (fflag)
goto nometa;
p = str->text;
- for (;;) { /* fast check for meta chars */
+ for (;;) { /* fast check for meta chars */
if ((c = *p++) == '\0')
goto nometa;
if (c == '*' || c == '?' || c == '[' || c == '!')
break;
}
}
- } else if (*p == '!' && p[1] == '!' && (p == name || p[-1] == '/')) {
+ } else if (*p == '!' && p[1] == '!' && (p == name || p[-1] == '/')) {
metaflag = 1;
} else if (*p == '\0')
break;
start = p + 1;
}
}
- if (metaflag == 0) { /* we've reached the end of the file name */
+ if (metaflag == 0) { /* we've reached the end of the file name */
if (enddir != expdir)
metaflag++;
for (p = name ; ; p++) {
continue;
if (patmatch(start, dp->d_name, 0)) {
if (atend) {
- scopy(dp->d_name, enddir);
+ strcpy(enddir, dp->d_name);
addfname(expdir);
} else {
for (p = enddir, cp = dp->d_name;
if (! atend)
endname[-1] = '/';
}
-#endif /* defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN) */
-
-
-/*
- * Add a file name to the list.
- */
-
-static void
-addfname(name)
- char *name;
- {
- char *p;
- struct strlist *sp;
+#endif /* defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN) */
- p = sstrdup(name);
- sp = (struct strlist *)stalloc(sizeof *sp);
- sp->text = p;
- *exparg.lastp = sp;
- exparg.lastp = &sp->next;
-}
-#if !(defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN))
+#if !(defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN))
/*
* Sort the results of file name expansion. It calculates the number of
* strings to sort and then calls msort (short for merge sort) to do the
q = p;
p = p->next;
}
- q->next = NULL; /* terminate first half of list */
- q = msort(list, half); /* sort first half of list */
- p = msort(p, len - half); /* sort second half */
+ q->next = NULL; /* terminate first half of list */
+ q = msort(list, half); /* sort first half of list */
+ p = msort(p, len - half); /* sort second half */
lpp = &list;
for (;;) {
if (strcmp(p->text, q->text) < 0) {
* Returns true if the pattern matches the string.
*/
-#if defined(__GLIBC__) && !defined(FNMATCH_BROKEN)
+#if defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN)
+/* squoted: string might have quote chars */
static int
-patmatch(pattern, string, squoted)
- char *pattern;
- char *string;
- int squoted; /* string might have quote chars */
- {
+patmatch(char *pattern, char *string, int squoted)
+{
const char *p;
char *q;
static int
-patmatch2(pattern, string, squoted)
- char *pattern;
- char *string;
- int squoted; /* string might have quote chars */
- {
+patmatch2(char *pattern, char *string, int squoted)
+{
char *p;
int res;
}
#else
static int
-patmatch(pattern, string, squoted)
- char *pattern;
- char *string;
- int squoted; /* string might have quote chars */
- {
-#ifdef notdef
- if (pattern[0] == '!' && pattern[1] == '!')
- return 1 - pmatch(pattern + 2, string);
- else
-#endif
- return pmatch(pattern, string, squoted);
+patmatch(char *pattern, char *string, int squoted) {
+ return pmatch(pattern, string, squoted);
}
static int
-pmatch(pattern, string, squoted)
- char *pattern;
- char *string;
- int squoted;
- {
+pmatch(char *pattern, char *string, int squoted)
+{
char *p, *q;
char c;
while (*endp == CTLQUOTEMARK)
endp++;
if (*endp == '\0')
- goto dft; /* no matching ] */
+ goto dft; /* no matching ] */
if (*endp == CTLESC)
endp++;
if (*++endp == ']')
return 0;
break;
}
-dft: default:
+dft: default:
if (squoted && *q == CTLESC)
q++;
if (*q++ != c)
* Remove any CTLESC characters from a string.
*/
-#if defined(__GLIBC__) && !defined(FNMATCH_BROKEN)
+#if defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN)
static char *
-_rmescapes(str, flag)
- char *str;
- int flag;
+_rmescapes(char *str, int flag)
{
char *p, *q, *r;
static const char qchars[] = { CTLESC, CTLQUOTEMARK, 0 };
size_t len = p - str;
q = r = stalloc(strlen(p) + len + 1);
if (len > 0) {
-#ifdef _GNU_SOURCE
- q = mempcpy(q, str, len);
-#else
memcpy(q, str, len);
q += len;
-#endif
}
}
while (*p) {
*/
static int
-casematch(pattern, val)
- union node *pattern;
- char *val;
- {
+casematch(union node *pattern, const char *val)
+{
struct stackmark smark;
int result;
char *p;
argstr(pattern->narg.text, EXP_TILDE | EXP_CASE);
STPUTC('\0', expdest);
p = grabstackstr(expdest);
- result = patmatch(p, val, 0);
+ result = patmatch(p, (char *)val, 0);
popstackmark(&smark);
return result;
}
STADJUST(len, buf);
return buf;
}
-/* $NetBSD: histedit.c,v 1.25 2001/02/04 19:52:06 christos Exp $ */
-
/*
* Editline and history functions (and glue).
*/
}
-/*
- * This file was generated by the mkinit program.
- */
-
-extern void rmaliases __P((void));
-
-extern int loopnest; /* current loop nesting level */
-
-extern void deletefuncs __P((void));
-
-struct strpush {
- struct strpush *prev; /* preceding string on stack */
- char *prevstring;
- int prevnleft;
- struct alias *ap; /* if push was associated with an alias */
- char *string; /* remember the string since it may change */
-};
-
-struct parsefile {
- struct parsefile *prev; /* preceding file on stack */
- int linno; /* current line */
- int fd; /* file descriptor (or -1 if string) */
- int nleft; /* number of chars left in this line */
- int lleft; /* number of chars left in this buffer */
- char *nextc; /* next char in buffer */
- char *buf; /* input buffer */
- struct strpush *strpush; /* for pushing strings at this level */
- struct strpush basestrpush; /* so pushing one is fast */
-};
-
-extern int parselleft; /* copy of parsefile->lleft */
-extern struct parsefile basepf; /* top level input file */
-extern char basebuf[BUFSIZ]; /* buffer for top level input file */
-
-extern short backgndpid; /* pid of last background process */
-extern int jobctl;
-
-extern int tokpushback; /* last token pushed back */
-extern int checkkwd; /* 1 == check for kwds, 2 == also eat newlines */
-
struct redirtab {
struct redirtab *next;
- short renamed[10];
+ short renamed[10]; /* Current ash support only 0-9 descriptors */
+ /* char on arm (and others) can't be negative */
};
-extern struct redirtab *redirlist;
-
-extern char sigmode[NSIG - 1]; /* current value of signal */
+static struct redirtab *redirlist;
extern char **environ;
*/
static void
-init() {
+init(void) {
/* from cd.c: */
{
basepf.nextc = basepf.buf = basebuf;
}
- /* from output.c: */
- {
-#ifdef USE_GLIBC_STDIO
- initstreams();
-#endif
- }
-
/* from var.c: */
{
char **envp;
}
}
- fmtstr(ppid, sizeof(ppid), "%d", (int) getppid());
+ snprintf(ppid, sizeof(ppid), "%d", (int) getppid());
setvar("PPID", ppid, 0);
}
}
* interactive shell and control is returned to the main command loop.
*/
+/* 1 == check for aliases, 2 == also check for assignments */
+static int checkalias; /* also used in no alias mode for check assignments */
+
static void
-reset() {
+reset(void) {
/* from eval.c: */
{
/* from input.c: */
{
if (exception != EXSHELLPROC)
- parselleft = parsenleft = 0; /* clear input buffer */
+ parselleft = parsenleft = 0; /* clear input buffer */
popallfiles();
}
popredir();
}
- /* from output.c: */
- {
- out1 = &output;
- out2 = &errout;
-#ifdef USE_GLIBC_STDIO
- if (memout.stream != NULL)
- __closememout();
-#endif
- if (memout.buf != NULL) {
- ckfree(memout.buf);
- memout.buf = NULL;
- }
- }
}
-/*
- * This routine is called to initialize the shell to run a shell procedure.
- */
-
-static void
-initshellproc() {
-
- /* from alias.c: */
- {
- rmaliases();
- }
-
- /* from eval.c: */
- {
- exitstatus = 0;
- }
-
- /* from exec.c: */
- {
- deletefuncs();
- }
-
- /* from jobs.c: */
- {
- backgndpid = -1;
-#if JOBS
- jobctl = 0;
-#endif
- }
-
- /* from options.c: */
- {
- int i;
-
- for (i = 0; i < NOPTS; i++)
- optlist[i].val = 0;
- optschanged();
-
- }
-
- /* from redir.c: */
- {
- clearredir();
- }
-
- /* from trap.c: */
- {
- char *sm;
-
- clear_traps();
- for (sm = sigmode ; sm < sigmode + NSIG - 1; sm++) {
- if (*sm == S_IGN)
- *sm = S_HARD_IGN;
- }
- }
-
- /* from var.c: */
- {
- shprocvar();
- }
-}
-/* $NetBSD: input.c,v 1.35 2001/02/04 19:52:06 christos Exp $ */
-
/*
* This file implements the input routines used by the parser.
*/
#ifdef BB_FEATURE_COMMAND_EDITING
-unsigned int shell_context;
static const char * cmdedit_prompt;
static inline void putprompt(const char *s) {
cmdedit_prompt = s;
}
#endif
-#define EOF_NLEFT -99 /* value of parsenleft when EOF pushed back */
+#define EOF_NLEFT -99 /* value of parsenleft when EOF pushed back */
-static int plinno = 1; /* input line number */
-static int parsenleft; /* copy of parsefile->nleft */
-static int parselleft; /* copy of parsefile->lleft */
-static char *parsenextc; /* copy of parsefile->nextc */
-struct parsefile basepf; /* top level input file */
-static char basebuf[BUFSIZ]; /* buffer for top level input file */
-struct parsefile *parsefile = &basepf; /* current input file */
-static int whichprompt; /* 1 == PS1, 2 == PS2 */
-static void pushfile __P((void));
-static int preadfd __P((void));
-#ifdef mkinit
-INCLUDE <stdio.h>
-INCLUDE "input.h"
-INCLUDE "error.h"
-
-INIT {
- basepf.nextc = basepf.buf = basebuf;
-}
+/*
+ * Same as pgetc(), but ignores PEOA.
+ */
-RESET {
- if (exception != EXSHELLPROC)
- parselleft = parsenleft = 0; /* clear input buffer */
- popallfiles();
+#ifdef ASH_ALIAS
+static int
+pgetc2(void)
+{
+ int c;
+ do {
+ c = pgetc_macro();
+ } while (c == PEOA);
+ return c;
}
+#else
+static inline int pgetc2() { return pgetc_macro(); }
#endif
-
/*
* Read a line from the script.
*/
-static char *
-pfgets(line, len)
- char *line;
- int len;
+static inline char *
+pfgets(char *line, int len)
{
char *p = line;
int nleft = len;
return line;
}
-
-/*
- * Read a character from the script, returning PEOF on end of file.
- * Nul characters in the input are silently discarded.
- */
-
-static int
-pgetc()
-{
- return pgetc_macro();
-}
-
-
-/*
- * Same as pgetc(), but ignores PEOA.
- */
-
-static int
-pgetc2()
-{
- int c;
- do {
- c = pgetc_macro();
- } while (c == PEOA);
- return c;
-}
-
-
-static int
-preadfd()
+static inline int
+preadfd(void)
{
int nr;
char *buf = parsefile->buf;
retry:
#ifdef BB_FEATURE_COMMAND_EDITING
{
- if (parsefile->fd)
- nr = read(parsefile->fd, buf, BUFSIZ - 1);
- else {
- do {
- cmdedit_read_input((char*)cmdedit_prompt, buf);
- nr = strlen(buf);
- } while (nr <=0 || shell_context);
- cmdedit_terminate();
+ if (!iflag || parsefile->fd)
+ nr = safe_read(parsefile->fd, buf, BUFSIZ - 1);
+ else {
+ nr = cmdedit_read_input((char*)cmdedit_prompt, buf);
}
}
#else
- nr = read(parsefile->fd, buf, BUFSIZ - 1);
+ nr = safe_read(parsefile->fd, buf, BUFSIZ - 1);
#endif
if (nr < 0) {
- if (errno == EINTR)
- goto retry;
if (parsefile->fd == 0 && errno == EWOULDBLOCK) {
int flags = fcntl(0, F_GETFL, 0);
if (flags >= 0 && flags & O_NONBLOCK) {
return nr;
}
+static void
+popstring(void)
+{
+ struct strpush *sp = parsefile->strpush;
+
+ INTOFF;
+#ifdef ASH_ALIAS
+ if (sp->ap) {
+ if (parsenextc[-1] == ' ' || parsenextc[-1] == '\t') {
+ if (!checkalias) {
+ checkalias = 1;
+ }
+ }
+ if (sp->string != sp->ap->val) {
+ ckfree(sp->string);
+ }
+
+ sp->ap->flag &= ~ALIASINUSE;
+ if (sp->ap->flag & ALIASDEAD) {
+ unalias(sp->ap->name);
+ }
+ }
+#endif
+ parsenextc = sp->prevstring;
+ parsenleft = sp->prevnleft;
+/*dprintf("*** calling popstring: restoring to '%s'\n", parsenextc);*/
+ parsefile->strpush = sp->prev;
+ if (sp != &(parsefile->basestrpush))
+ ckfree(sp);
+ INTON;
+}
+
+
/*
* Refill the input buffer and return the next input character:
*
*/
static int
-preadbuffer()
+preadbuffer(void)
{
char *p, *q;
int more;
char savec;
while (parsefile->strpush) {
- if (
- parsenleft == -1 && parsefile->strpush->ap &&
- parsenextc[-1] != ' ' && parsenextc[-1] != '\t'
- ) {
+#ifdef ASH_ALIAS
+ if (parsenleft == -1 && parsefile->strpush->ap &&
+ parsenextc[-1] != ' ' && parsenextc[-1] != '\t') {
return PEOA;
}
+#endif
popstring();
if (--parsenleft >= 0)
return (*parsenextc++);
}
if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
return PEOF;
- flushout(&output);
-#ifdef FLUSHERR
- flushout(&errout);
-#endif
+ flushall();
again:
if (parselleft <= 0) {
for (more = 1; more;) {
switch (*p) {
case '\0':
- p++; /* Skip nul */
+ p++; /* Skip nul */
goto check;
if (vflag) {
out2str(parsenextc);
-#ifdef FLUSHERR
- flushout(out2);
-#endif
}
*q = savec;
return *parsenextc++;
}
-/*
- * Undo the last call to pgetc. Only one character may be pushed back.
- * PEOF may be pushed back.
- */
-
-static void
-pungetc() {
- parsenleft++;
- parsenextc--;
-}
/*
* Push a string back onto the input at this current parsefile level.
* We handle aliases this way.
*/
static void
-pushstring(s, len, ap)
- char *s;
- int len;
- void *ap;
- {
+pushstring(char *s, int len, void *ap)
+{
struct strpush *sp;
INTOFF;
sp = parsefile->strpush = &(parsefile->basestrpush);
sp->prevstring = parsenextc;
sp->prevnleft = parsenleft;
+#ifdef ASH_ALIAS
sp->ap = (struct alias *)ap;
if (ap) {
((struct alias *)ap)->flag |= ALIASINUSE;
sp->string = s;
}
+#endif
parsenextc = s;
parsenleft = len;
INTON;
}
-static void
-popstring()
-{
- struct strpush *sp = parsefile->strpush;
-
- INTOFF;
- if (sp->ap) {
- if (parsenextc[-1] == ' ' || parsenextc[-1] == '\t') {
- if (!checkalias) {
- checkalias = 1;
- }
- }
- if (sp->string != sp->ap->val) {
- ckfree(sp->string);
- }
- sp->ap->flag &= ~ALIASINUSE;
- if (sp->ap->flag & ALIASDEAD) {
- unalias(sp->ap->name);
- }
- }
- parsenextc = sp->prevstring;
- parsenleft = sp->prevnleft;
-/*dprintf("*** calling popstring: restoring to '%s'\n", parsenextc);*/
- parsefile->strpush = sp->prev;
- if (sp != &(parsefile->basestrpush))
- ckfree(sp);
- INTON;
-}
-
-/*
- * Set the input to take input from a file. If push is set, push the
- * old input onto the stack first.
- */
-
-static void
-setinputfile(fname, push)
- const char *fname;
- int push;
-{
- int fd;
- int myfileno2;
-
- INTOFF;
- if ((fd = open(fname, O_RDONLY)) < 0)
- error("Can't open %s", fname);
- if (fd < 10) {
- myfileno2 = dup_as_newfd(fd, 10);
- close(fd);
- if (myfileno2 < 0)
- error("Out of file descriptors");
- fd = myfileno2;
- }
- setinputfd(fd, push);
- INTON;
-}
-
-
-/*
- * Like setinputfile, but takes an open file descriptor. Call this with
- * interrupts off.
- */
-
-static void
-setinputfd(fd, push)
- int fd, push;
-{
- (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
- if (push) {
- pushfile();
- parsefile->buf = 0;
- } else {
- closescript();
- while (parsefile->strpush)
- popstring();
- }
- parsefile->fd = fd;
- if (parsefile->buf == NULL)
- parsefile->buf = ckmalloc(BUFSIZ);
- parselleft = parsenleft = 0;
- plinno = 1;
-}
-
/*
* Like setinputfile, but takes input from a string.
*/
static void
-setinputstring(string)
- char *string;
- {
+setinputstring(char *string)
+{
INTOFF;
pushfile();
parsenextc = string;
*/
static void
-pushfile() {
+pushfile(void) {
struct parsefile *pf;
parsefile->nleft = parsenleft;
parsefile = pf;
}
-
-static void
-popfile() {
- struct parsefile *pf = parsefile;
-
- INTOFF;
- if (pf->fd >= 0)
- close(pf->fd);
- if (pf->buf)
- ckfree(pf->buf);
- while (pf->strpush)
- popstring();
- parsefile = pf->prev;
- ckfree(pf);
- parsenleft = parsefile->nleft;
- parselleft = parsefile->lleft;
- parsenextc = parsefile->nextc;
- plinno = parsefile->linno;
- INTON;
-}
-
-
-/*
- * Return to top level.
- */
-
-static void
-popallfiles() {
- while (parsefile != &basepf)
- popfile();
-}
-
+#ifdef JOBS
+static void restartjob (struct job *);
+#endif
+static void freejob (struct job *);
+static struct job *getjob (const char *);
+static int dowait (int, struct job *);
+static void waitonint(int);
/*
- * Close the file(s) that the shell is reading commands from. Called
- * after a fork is done.
- */
+ * We keep track of whether or not fd0 has been redirected. This is for
+ * background commands, where we want to redirect fd0 to /dev/null only
+ * if it hasn't already been redirected.
+*/
+static int fd0_redirected = 0;
-static void
-closescript() {
- popallfiles();
- if (parsefile->fd > 0) {
- close(parsefile->fd);
- parsefile->fd = 0;
- }
+/* Return true if fd 0 has already been redirected at least once. */
+static inline int
+fd0_redirected_p (void)
+{
+ return fd0_redirected != 0;
}
-/* $NetBSD: jobs.c,v 1.36 2000/05/22 10:18:47 elric Exp $ */
-
-
-struct job *jobtab; /* array of jobs */
-static int njobs; /* size of array */
-short backgndpid = -1; /* pid of last background process */
-#if JOBS
-static int initialpgrp; /* pgrp of shell on invocation */
-short curjob; /* current job */
-#endif
-static int intreceived;
-
-static void restartjob __P((struct job *));
-static void freejob __P((struct job *));
-static struct job *getjob __P((char *));
-static int dowait __P((int, struct job *));
-#ifdef SYSV
-static int onsigchild __P((void));
-#endif
-static int waitproc __P((int, int *));
-static void cmdtxt __P((union node *));
-static void cmdputs __P((const char *));
-static void waitonint(int);
+static void dupredirect (const union node *, int, int fd1dup);
-#if JOBS
+#ifdef JOBS
/*
* Turn job control on and off.
*
* System V doesn't have job control yet, this isn't a problem now.
*/
-static int jobctl;
+
static void setjobctl(int enable)
{
if (enable) {
do { /* while we are in the background */
#ifdef OLD_TTY_DRIVER
- if (ioctl(fileno2, TIOCGPGRP, (char *)&initialpgrp) < 0) {
+ if (ioctl(2, TIOCGPGRP, (char *)&initialpgrp) < 0) {
#else
- initialpgrp = tcgetpgrp(fileno2);
+ initialpgrp = tcgetpgrp(2);
if (initialpgrp < 0) {
#endif
- out2str("sh: can't access tty; job cenabletrol turned off\n");
+ out2str("sh: can't access tty; job control turned off\n");
mflag = 0;
return;
}
}
} while (0);
#ifdef OLD_TTY_DRIVER
- if (ioctl(fileno2, TIOCGETD, (char *)&ldisc) < 0 || ldisc != NTTYDISC) {
- out2str("sh: need new tty driver to run job cenabletrol; job cenabletrol turned off\n");
+ if (ioctl(2, TIOCGETD, (char *)&ldisc) < 0 || ldisc != NTTYDISC) {
+ out2str("sh: need new tty driver to run job control; job control turned off\n");
mflag = 0;
return;
}
setsignal(SIGTTIN);
setpgid(0, rootpid);
#ifdef OLD_TTY_DRIVER
- ioctl(fileno2, TIOCSPGRP, (char *)&rootpid);
+ ioctl(2, TIOCSPGRP, (char *)&rootpid);
#else
- tcsetpgrp(fileno2, rootpid);
+ tcsetpgrp(2, rootpid);
#endif
- } else { /* turning job cenabletrol off */
+ } else { /* turning job control off */
setpgid(0, initialpgrp);
#ifdef OLD_TTY_DRIVER
- ioctl(fileno2, TIOCSPGRP, (char *)&initialpgrp);
+ ioctl(2, TIOCSPGRP, (char *)&initialpgrp);
#else
- tcsetpgrp(fileno2, initialpgrp);
+ tcsetpgrp(2, initialpgrp);
#endif
setsignal(SIGTSTP);
setsignal(SIGTTOU);
#endif
-#ifdef mkinit
-INCLUDE <stdlib.h>
-
-SHELLPROC {
- backgndpid = -1;
-#if JOBS
- jobctl = 0;
-#endif
-}
-
-#endif
-
-
-/* This file was automatically created by ./mksignames.
- Do not edit. Edit support/mksignames.c instead. */
-
-/* A translation list so we can be polite to our users. */
-static char *signal_names[NSIG + 2] = {
- "EXIT",
- "SIGHUP",
- "SIGINT",
- "SIGQUIT",
- "SIGILL",
- "SIGTRAP",
- "SIGABRT",
- "SIGBUS",
- "SIGFPE",
- "SIGKILL",
- "SIGUSR1",
- "SIGSEGV",
- "SIGUSR2",
- "SIGPIPE",
- "SIGALRM",
- "SIGTERM",
- "SIGJUNK(16)",
- "SIGCHLD",
- "SIGCONT",
- "SIGSTOP",
- "SIGTSTP",
- "SIGTTIN",
- "SIGTTOU",
- "SIGURG",
- "SIGXCPU",
- "SIGXFSZ",
- "SIGVTALRM",
- "SIGPROF",
- "SIGWINCH",
- "SIGIO",
- "SIGPWR",
- "SIGSYS",
- "SIGRTMIN",
- "SIGRTMIN+1",
- "SIGRTMIN+2",
- "SIGRTMIN+3",
- "SIGRTMIN+4",
- "SIGRTMIN+5",
- "SIGRTMIN+6",
- "SIGRTMIN+7",
- "SIGRTMIN+8",
- "SIGRTMIN+9",
- "SIGRTMIN+10",
- "SIGRTMIN+11",
- "SIGRTMIN+12",
- "SIGRTMIN+13",
- "SIGRTMIN+14",
- "SIGRTMIN+15",
- "SIGRTMAX-15",
- "SIGRTMAX-14",
- "SIGRTMAX-13",
- "SIGRTMAX-12",
- "SIGRTMAX-11",
- "SIGRTMAX-10",
- "SIGRTMAX-9",
- "SIGRTMAX-8",
- "SIGRTMAX-7",
- "SIGRTMAX-6",
- "SIGRTMAX-5",
- "SIGRTMAX-4",
- "SIGRTMAX-3",
- "SIGRTMAX-2",
- "SIGRTMAX-1",
- "SIGRTMAX",
- "DEBUG",
- (char *)0x0,
-};
-
-
-
-#if JOBS
+#ifdef JOBS
static int
killcmd(argc, argv)
int argc;
optionarg
);
}
- break;
+ break;
#ifdef DEBUG
default:
error(
}
if (list) {
+ const char *name;
+
if (!*argptr) {
out1str("0\n");
for (i = 1; i < NSIG; i++) {
- out1fmt(snlfmt, signal_names[i] + 3);
+ name = u_signal_names(0, &i, 1);
+ if(name)
+ printf(snlfmt, name);
}
return 0;
}
- signo = atoi(*argptr);
- if (signo > 128)
- signo -= 128;
- if (0 < signo && signo < NSIG)
- out1fmt(snlfmt, signal_names[signo] + 3);
+ name = u_signal_names(*argptr, &signo, -1);
+ if (name)
+ printf(snlfmt, name);
else
error("invalid signal number or exit status: %s",
*argptr);
} else
pid = atoi(*argptr);
if (kill(pid, signo) != 0)
- error("%s: %s", *argptr, strerror(errno));
+ error("%s: %m", *argptr);
} while (*++argptr);
return 0;
error("job not created under job control");
pgrp = jp->ps[0].pid;
#ifdef OLD_TTY_DRIVER
- ioctl(fileno2, TIOCSPGRP, (char *)&pgrp);
+ ioctl(2, TIOCSPGRP, (char *)&pgrp);
#else
- tcsetpgrp(fileno2, pgrp);
+ tcsetpgrp(2, pgrp);
#endif
restartjob(jp);
INTOFF;
}
#endif
+static void showjobs(int change);
+
static int
jobscmd(argc, argv)
if (change && ! jp->changed)
continue;
procno = jp->nprocs;
- for (ps = jp->ps ; ; ps++) { /* for each process */
+ for (ps = jp->ps ; ; ps++) { /* for each process */
if (ps == jp->ps)
- fmtstr(s, 64, "[%d] %ld ", jobno,
+ snprintf(s, 64, "[%d] %ld ", jobno,
(long)ps->pid);
else
- fmtstr(s, 64, " %ld ",
+ snprintf(s, 64, " %ld ",
(long)ps->pid);
out1str(s);
col = strlen(s);
if (ps->status == -1) {
/* don't print anything */
} else if (WIFEXITED(ps->status)) {
- fmtstr(s, 64, "Exit %d",
+ snprintf(s, 64, "Exit %d",
WEXITSTATUS(ps->status));
} else {
-#if JOBS
- if (WIFSTOPPED(ps->status))
+#ifdef JOBS
+ if (WIFSTOPPED(ps->status))
i = WSTOPSIG(ps->status);
else /* WIFSIGNALED(ps->status) */
#endif
i = WTERMSIG(ps->status);
if ((i & 0x7F) < NSIG && sys_siglist[i & 0x7F])
- scopy(sys_siglist[i & 0x7F], s);
+ strcpy(s, sys_siglist[i & 0x7F]);
else
- fmtstr(s, 64, "Signal %d", i & 0x7F);
+ snprintf(s, 64, "Signal %d", i & 0x7F);
if (WCOREDUMP(ps->status))
strcat(s, " (core dumped)");
}
out1str(s);
col += strlen(s);
- out1fmt(
+ printf(
"%*c%s\n", 30 - col >= 0 ? 30 - col : 0, ' ',
ps->cmd
);
*/
static void
-freejob(jp)
- struct job *jp;
- {
- struct procstat *ps;
+freejob(struct job *jp)
+{
+ const struct procstat *ps;
int i;
INTOFF;
if (jp->ps != &jp->ps0)
ckfree(jp->ps);
jp->used = 0;
-#if JOBS
+#ifdef JOBS
if (curjob == jp - jobtab + 1)
curjob = 0;
#endif
} else {
job = NULL;
}
- for (;;) { /* loop until process terminated or stopped */
+ for (;;) { /* loop until process terminated or stopped */
if (job != NULL) {
if (job->state) {
status = job->ps[job->nprocs - 1].status;
}
if (WIFEXITED(status))
retval = WEXITSTATUS(status);
-#if JOBS
+#ifdef JOBS
else if (WIFSTOPPED(status))
retval = WSTOPSIG(status) + 128;
#endif
}
} else {
for (jp = jobtab ; ; jp++) {
- if (jp >= jobtab + njobs) { /* no running procs */
+ if (jp >= jobtab + njobs) { /* no running procs */
return 0;
}
if (jp->used && jp->state == 0)
*/
static struct job *
-getjob(name)
- char *name;
- {
+getjob(const char *name)
+{
int jobno;
struct job *jp;
int pid;
int i;
if (name == NULL) {
-#if JOBS
+#ifdef JOBS
currentjob:
if ((jobno = curjob) == 0 || jobtab[jobno - 1].used == 0)
error("No current job");
if (jobno > 0 && jobno <= njobs
&& jobtab[jobno - 1].used != 0)
return &jobtab[jobno - 1];
-#if JOBS
+#ifdef JOBS
} else if (name[1] == '%' && name[2] == '\0') {
goto currentjob;
#endif
if (found)
return found;
}
- } else if (is_number(name)) {
- pid = number(name);
+ } else if (is_number(name, &pid)) {
for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
if (jp->used && jp->nprocs > 0
&& jp->ps[jp->nprocs - 1].pid == pid)
* Return a new job structure,
*/
-struct job *
-makejob(node, nprocs)
- union node *node;
- int nprocs;
+static struct job *
+makejob(const union node *node, int nprocs)
{
int i;
struct job *jp;
jp->used = 1;
jp->changed = 0;
jp->nprocs = 0;
-#if JOBS
+#ifdef JOBS
jp->jobctl = jobctl;
#endif
if (nprocs > 1) {
* own process group. Jp is a job structure that the job is to be added to.
* N is the command that will be evaluated by the child. Both jp and n may
* be NULL. The mode parameter can be one of the following:
- * FORK_FG - Fork off a foreground process.
- * FORK_BG - Fork off a background process.
- * FORK_NOJOB - Like FORK_FG, but don't give the process its own
- * process group even if job control is on.
+ * FORK_FG - Fork off a foreground process.
+ * FORK_BG - Fork off a background process.
+ * FORK_NOJOB - Like FORK_FG, but don't give the process its own
+ * process group even if job control is on.
*
* When job control is turned off, background processes have their standard
* input redirected to /dev/null (except for the second and later processes
* in a pipeline).
*/
+
+
static int
-forkshell(jp, n, mode)
- union node *n;
- struct job *jp;
- int mode;
+forkshell(struct job *jp, const union node *n, int mode)
{
int pid;
+#ifdef JOBS
int pgrp;
+#endif
const char *devnull = _PATH_DEVNULL;
const char *nullerr = "Can't open %s";
closescript();
INTON;
clear_traps();
-#if JOBS
- jobctl = 0; /* do job control only in root shell */
+#ifdef JOBS
+ jobctl = 0; /* do job control only in root shell */
if (wasroot && mode != FORK_NOJOB && mflag) {
if (jp == NULL || jp->nprocs == 0)
pgrp = getpid();
if (mode == FORK_FG) {
/*** this causes superfluous TIOCSPGRPS ***/
#ifdef OLD_TTY_DRIVER
- if (ioctl(fileno2, TIOCSPGRP, (char *)&pgrp) < 0)
+ if (ioctl(2, TIOCSPGRP, (char *)&pgrp) < 0)
error("TIOCSPGRP failed, errno=%d", errno);
#else
- if (tcsetpgrp(fileno2, pgrp) < 0)
+ if (tcsetpgrp(2, pgrp) < 0)
error("tcsetpgrp failed, errno=%d", errno);
#endif
}
}
return pid;
}
+#ifdef JOBS
if (rootshell && mode != FORK_NOJOB && mflag) {
if (jp == NULL || jp->nprocs == 0)
pgrp = pid;
pgrp = jp->ps[0].pid;
setpgid(pid, pgrp);
}
+#endif
if (mode == FORK_BG)
- backgndpid = pid; /* set $! */
+ backgndpid = pid; /* set $! */
if (jp) {
struct procstat *ps = &jp->ps[jp->nprocs++];
ps->pid = pid;
*/
static int
-waitforjob(jp)
- struct job *jp;
- {
-#if JOBS
+waitforjob(struct job *jp)
+{
+#ifdef JOBS
int mypgrp = getpgrp();
#endif
int status;
INTOFF;
intreceived = 0;
-#if JOBS
+#ifdef JOBS
if (!jobctl) {
#else
if (!iflag) {
while (jp->state == 0) {
dowait(1, jp);
}
-#if JOBS
+#ifdef JOBS
if (!jobctl) {
#else
if (!iflag) {
sigaction(SIGINT, &oact, 0);
if (intreceived && trap[SIGINT]) kill(getpid(), SIGINT);
}
-#if JOBS
+#ifdef JOBS
if (jp->jobctl) {
#ifdef OLD_TTY_DRIVER
- if (ioctl(fileno2, TIOCSPGRP, (char *)&mypgrp) < 0)
+ if (ioctl(2, TIOCSPGRP, (char *)&mypgrp) < 0)
error("TIOCSPGRP failed, errno=%d\n", errno);
#else
- if (tcsetpgrp(fileno2, mypgrp) < 0)
+ if (tcsetpgrp(2, mypgrp) < 0)
error("tcsetpgrp failed, errno=%d\n", errno);
#endif
}
/* convert to 8 bits */
if (WIFEXITED(status))
st = WEXITSTATUS(status);
-#if JOBS
+#ifdef JOBS
else if (WIFSTOPPED(status))
st = WSTOPSIG(status) + 128;
#endif
else
st = WTERMSIG(status) + 128;
-#if JOBS
+#ifdef JOBS
if (jp->jobctl) {
/*
* This is truly gross.
if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT)
raise(SIGINT);
}
+ if (jp->state == JOBDONE)
+
#endif
- if (! JOBS || jp->state == JOBDONE)
freejob(jp);
INTON;
return st;
-/*
- * Wait for a process to terminate.
- */
+/*
+ * Wait for a process to terminate.
+ */
+
+/*
+ * Do a wait system call. If job control is compiled in, we accept
+ * stopped processes. If block is zero, we return a value of zero
+ * rather than blocking.
+ *
+ * System V doesn't have a non-blocking wait system call. It does
+ * have a SIGCLD signal that is sent to a process when one of it's
+ * children dies. The obvious way to use SIGCLD would be to install
+ * a handler for SIGCLD which simply bumped a counter when a SIGCLD
+ * was received, and have waitproc bump another counter when it got
+ * the status of a process. Waitproc would then know that a wait
+ * system call would not block if the two counters were different.
+ * This approach doesn't work because if a process has children that
+ * have not been waited for, System V will send it a SIGCLD when it
+ * installs a signal handler for SIGCLD. What this means is that when
+ * a child exits, the shell will be sent SIGCLD signals continuously
+ * until is runs out of stack space, unless it does a wait call before
+ * restoring the signal handler. The code below takes advantage of
+ * this (mis)feature by installing a signal handler for SIGCLD and
+ * then checking to see whether it was called. If there are any
+ * children to be waited for, it will be.
+ *
+ */
+
+static inline int
+waitproc(int block, int *status)
+{
+ int flags;
+
+ flags = 0;
+#ifdef JOBS
+ if (jobctl)
+ flags |= WUNTRACED;
+#endif
+ if (block == 0)
+ flags |= WNOHANG;
+ return wait3(status, flags, (struct rusage *)NULL);
+}
static int
-dowait(block, job)
- int block;
- struct job *job;
+dowait(int block, struct job *job)
{
int pid;
int status;
else if (WIFSTOPPED(sp->status))
done = 0;
}
- if (stopped) { /* stopped or done */
+ if (stopped) { /* stopped or done */
int state = done? JOBDONE : JOBSTOPPED;
if (jp->state != state) {
TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state));
jp->state = state;
-#if JOBS
+#ifdef JOBS
if (done && curjob == jp - jobtab + 1)
- curjob = 0; /* no current job */
+ curjob = 0; /* no current job */
#endif
}
}
INTON;
if (! rootshell || ! iflag || (job && thisjob == job)) {
core = WCOREDUMP(status);
-#if JOBS
+#ifdef JOBS
if (WIFSTOPPED(status)) sig = WSTOPSIG(status);
else
#endif
if (sig != 0 && sig != SIGINT && sig != SIGPIPE) {
if (thisjob != job)
- outfmt(out2, "%d: ", pid);
-#if JOBS
+ out2fmt("%d: ", pid);
+#ifdef JOBS
if (sig == SIGTSTP && rootshell && iflag)
- outfmt(out2, "%%%ld ",
+ out2fmt("%%%ld ",
(long)(job - jobtab + 1));
#endif
if (sig < NSIG && sys_siglist[sig])
out2str(sys_siglist[sig]);
else
- outfmt(out2, "Signal %d", sig);
+ out2fmt("Signal %d", sig);
if (core)
out2str(" - core dumped");
out2c('\n');
-#ifdef FLUSHERR
- flushout(&errout);
-#endif
} else {
- TRACE(("Not printing status: status=%d, sig=%d\n",
+ TRACE(("Not printing status: status=%d, sig=%d\n",
status, sig));
}
} else {
-/*
- * Do a wait system call. If job control is compiled in, we accept
- * stopped processes. If block is zero, we return a value of zero
- * rather than blocking.
- *
- * System V doesn't have a non-blocking wait system call. It does
- * have a SIGCLD signal that is sent to a process when one of it's
- * children dies. The obvious way to use SIGCLD would be to install
- * a handler for SIGCLD which simply bumped a counter when a SIGCLD
- * was received, and have waitproc bump another counter when it got
- * the status of a process. Waitproc would then know that a wait
- * system call would not block if the two counters were different.
- * This approach doesn't work because if a process has children that
- * have not been waited for, System V will send it a SIGCLD when it
- * installs a signal handler for SIGCLD. What this means is that when
- * a child exits, the shell will be sent SIGCLD signals continuously
- * until is runs out of stack space, unless it does a wait call before
- * restoring the signal handler. The code below takes advantage of
- * this (mis)feature by installing a signal handler for SIGCLD and
- * then checking to see whether it was called. If there are any
- * children to be waited for, it will be.
- *
- * If neither SYSV nor BSD is defined, we don't implement nonblocking
- * waits at all. In this case, the user will not be informed when
- * a background process until the next time she runs a real program
- * (as opposed to running a builtin command or just typing return),
- * and the jobs command may give out of date information.
- */
-
-#ifdef SYSV
-static int gotsigchild;
-
-static int onsigchild() {
- gotsigchild = 1;
-}
-#endif
-
-
-static int
-waitproc(block, status)
- int block;
- int *status;
-{
-#ifdef BSD
- int flags;
-
- flags = 0;
-#if JOBS
- if (jobctl)
- flags |= WUNTRACED;
-#endif
- if (block == 0)
- flags |= WNOHANG;
- return wait3(status, flags, (struct rusage *)NULL);
-#else
-#ifdef SYSV
- int (*save)();
-
- if (block == 0) {
- gotsigchild = 0;
- save = signal(SIGCLD, onsigchild);
- signal(SIGCLD, save);
- if (gotsigchild == 0)
- return 0;
- }
- return wait(status);
-#else
- if (block == 0)
- return 0;
- return wait(status);
-#endif
-#endif
-}
/*
* return 1 if there are stopped jobs, otherwise 0
*/
-static int job_warning = 0;
static int
-stoppedjobs()
+stoppedjobs(void)
{
int jobno;
struct job *jp;
static char *cmdnextc;
static int cmdnleft;
-#define MAXCMDTEXT 200
+#define MAXCMDTEXT 200
-static char *
-commandtext(n)
- union node *n;
- {
- char *name;
+static void
+cmdputs(const char *s)
+{
+ const char *p;
+ char *q;
+ char c;
+ int subtype = 0;
- cmdnextc = name = ckmalloc(MAXCMDTEXT);
- cmdnleft = MAXCMDTEXT - 4;
- cmdtxt(n);
- *cmdnextc = '\0';
- return name;
+ if (cmdnleft <= 0)
+ return;
+ p = s;
+ q = cmdnextc;
+ while ((c = *p++) != '\0') {
+ if (c == CTLESC)
+ *q++ = *p++;
+ else if (c == CTLVAR) {
+ *q++ = '$';
+ if (--cmdnleft > 0)
+ *q++ = '{';
+ subtype = *p++;
+ } else if (c == '=' && subtype != 0) {
+ *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL];
+ subtype = 0;
+ } else if (c == CTLENDVAR) {
+ *q++ = '}';
+ } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE)
+ cmdnleft++; /* ignore it */
+ else
+ *q++ = c;
+ if (--cmdnleft <= 0) {
+ *q++ = '.';
+ *q++ = '.';
+ *q++ = '.';
+ break;
+ }
+ }
+ cmdnextc = q;
}
+#define CMDTXT_TABLE
+#ifdef CMDTXT_TABLE
+/*
+ * To collect a lot of redundant code in cmdtxt() case statements, we
+ * implement a mini language here. Each type of node struct has an
+ * associated instruction sequence that operates on its members via
+ * their offsets. The instruction are pack in unsigned chars with
+ * format IIDDDDDE where the bits are
+ * I : part of the instruction opcode, which are
+ * 00 : member is a pointer to another node -- process it recursively
+ * 40 : member is a pointer to a char string -- output it
+ * 80 : output the string whose index is stored in the data field
+ * CC : flag signaling that this case needs external processing
+ * D : data - either the (shifted) index of a fixed string to output or
+ * the actual offset of the member to operate on in the struct
+ * (since we assume bit 0 is set, the offset is not shifted)
+ * E : flag signaling end of instruction sequence
+ *
+ * WARNING: In order to handle larger offsets for 64bit archs, this code
+ * assumes that no offset can be an odd number and stores the
+ * end-of-instructions flag in bit 0.
+ */
+
+#define CMDTXT_NOMORE 0x01 /* NOTE: no offset should be odd */
+#define CMDTXT_CHARPTR 0x40
+#define CMDTXT_STRING 0x80
+#define CMDTXT_SPECIAL 0xC0
+#define CMDTXT_OFFSETMASK 0x3E
+
+static const char * const cmdtxt_strings[] = {
+ /* 0 1 2 3 4 5 6 7 */
+ "; ", "(", ")", " && ", " || ", "if ", "; then ", "...",
+ /* 8 9 10 11 12 13 */
+ "while ", "; do ", "; done", "until ", "for ", " in ...",
+ /* 14 15 16 17 */
+ "case ", "???", "() ...", "<<..."
+};
+
+static const char * const redir_strings[] = {
+ ">", "<", "<>", ">>", ">|", ">&", "<&"
+};
+
+static const unsigned char cmdtxt_ops[] = {
+#define CMDTXT_NSEMI 0
+ offsetof(union node, nbinary.ch1),
+ 0|CMDTXT_STRING,
+ offsetof(union node, nbinary.ch2)|CMDTXT_NOMORE,
+#define CMDTXT_NCMD (CMDTXT_NSEMI + 3)
+#define CMDTXT_NPIPE (CMDTXT_NCMD)
+#define CMDTXT_NCASE (CMDTXT_NCMD)
+#define CMDTXT_NTO (CMDTXT_NCMD)
+#define CMDTXT_NFROM (CMDTXT_NCMD)
+#define CMDTXT_NFROMTO (CMDTXT_NCMD)
+#define CMDTXT_NAPPEND (CMDTXT_NCMD)
+#define CMDTXT_NTOOV (CMDTXT_NCMD)
+#define CMDTXT_NTOFD (CMDTXT_NCMD)
+#define CMDTXT_NFROMFD (CMDTXT_NCMD)
+ CMDTXT_SPECIAL,
+#define CMDTXT_NREDIR (CMDTXT_NPIPE + 1)
+#define CMDTXT_NBACKGND (CMDTXT_NREDIR)
+ offsetof(union node, nredir.n)|CMDTXT_NOMORE,
+#define CMDTXT_NSUBSHELL (CMDTXT_NBACKGND + 1)
+ (1*2)|CMDTXT_STRING,
+ offsetof(union node, nredir.n),
+ (2*2)|CMDTXT_STRING|CMDTXT_NOMORE,
+#define CMDTXT_NAND (CMDTXT_NSUBSHELL + 3)
+ offsetof(union node, nbinary.ch1),
+ (3*2)|CMDTXT_STRING,
+ offsetof(union node, nbinary.ch2)|CMDTXT_NOMORE,
+#define CMDTXT_NOR (CMDTXT_NAND + 3)
+ offsetof(union node, nbinary.ch1),
+ (4*2)|CMDTXT_STRING,
+ offsetof(union node, nbinary.ch2)|CMDTXT_NOMORE,
+#define CMDTXT_NIF (CMDTXT_NOR + 3)
+ (5*2)|CMDTXT_STRING,
+ offsetof(union node, nif.test),
+ (6*2)|CMDTXT_STRING,
+ offsetof(union node, nif.ifpart),
+ (7*2)|CMDTXT_STRING|CMDTXT_NOMORE,
+#define CMDTXT_NWHILE (CMDTXT_NIF + 5)
+ (8*2)|CMDTXT_STRING,
+ offsetof(union node, nbinary.ch1),
+ (9*2)|CMDTXT_STRING,
+ offsetof(union node, nbinary.ch2),
+ (10*2)|CMDTXT_STRING|CMDTXT_NOMORE,
+#define CMDTXT_NUNTIL (CMDTXT_NWHILE + 5)
+ (11*2)|CMDTXT_STRING,
+ offsetof(union node, nbinary.ch1),
+ (9*2)|CMDTXT_STRING,
+ offsetof(union node, nbinary.ch2),
+ (10*2)|CMDTXT_STRING|CMDTXT_NOMORE,
+#define CMDTXT_NFOR (CMDTXT_NUNTIL + 5)
+ (12*2)|CMDTXT_STRING,
+ offsetof(union node, nfor.var)|CMDTXT_CHARPTR,
+ (13*2)|CMDTXT_STRING|CMDTXT_NOMORE,
+#define CMDTXT_NCLIST (CMDTXT_NFOR + 3) /* TODO: IS THIS CORRECT??? */
+#define CMDTXT_NNOT (CMDTXT_NCLIST) /* TODO: IS THIS CORRECT??? */
+ (15*2)|CMDTXT_STRING|CMDTXT_NOMORE,
+#define CMDTXT_NDEFUN (CMDTXT_NCLIST + 1)
+ offsetof(union node, narg.text)|CMDTXT_CHARPTR,
+ (16*2)|CMDTXT_STRING|CMDTXT_NOMORE,
+#define CMDTXT_NARG (CMDTXT_NDEFUN + 2)
+ offsetof(union node, narg.text)|CMDTXT_CHARPTR|CMDTXT_NOMORE,
+#define CMDTXT_NHERE (CMDTXT_NARG + 1)
+#define CMDTXT_NXHERE (CMDTXT_NHERE)
+ (17*2)|CMDTXT_STRING|CMDTXT_NOMORE,
+};
+
+#if CMDTXT_NXHERE != 36
+#error CMDTXT_NXHERE
+#endif
+
+static const unsigned char cmdtxt_ops_index[26] = {
+ CMDTXT_NSEMI,
+ CMDTXT_NCMD,
+ CMDTXT_NPIPE,
+ CMDTXT_NREDIR,
+ CMDTXT_NBACKGND,
+ CMDTXT_NSUBSHELL,
+ CMDTXT_NAND,
+ CMDTXT_NOR,
+ CMDTXT_NIF,
+ CMDTXT_NWHILE,
+ CMDTXT_NUNTIL,
+ CMDTXT_NFOR,
+ CMDTXT_NCASE,
+ CMDTXT_NCLIST,
+ CMDTXT_NDEFUN,
+ CMDTXT_NARG,
+ CMDTXT_NTO,
+ CMDTXT_NFROM,
+ CMDTXT_NFROMTO,
+ CMDTXT_NAPPEND,
+ CMDTXT_NTOOV,
+ CMDTXT_NTOFD,
+ CMDTXT_NFROMFD,
+ CMDTXT_NHERE,
+ CMDTXT_NXHERE,
+ CMDTXT_NNOT,
+};
static void
-cmdtxt(n)
- union node *n;
- {
+cmdtxt(const union node *n)
+{
+ const char *p;
+
+ if (n == NULL)
+ return;
+
+ p = cmdtxt_ops + (int) cmdtxt_ops_index[n->type];
+ if ((*p & CMDTXT_SPECIAL) != CMDTXT_SPECIAL) { /* normal case */
+ do {
+ if (*p & CMDTXT_STRING) { /* output fixed string */
+ cmdputs(cmdtxt_strings[((int)(*p & CMDTXT_OFFSETMASK) >> 1)]);
+ } else {
+ const char *pf = ((const char *) n)
+ + ((int)(*p & CMDTXT_OFFSETMASK));
+ if (*p & CMDTXT_CHARPTR) { /* output dynamic string */
+ cmdputs(*((const char **) pf));
+ } else { /* output field */
+ cmdtxt(*((const union node **) pf));
+ }
+ }
+ } while (!(*p++ & CMDTXT_NOMORE));
+ } else if (n->type == NCMD) {
+ union node *np;
+ for (np = n->ncmd.args ; np ; np = np->narg.next) {
+ cmdtxt(np);
+ if (np->narg.next)
+ cmdputs(spcstr);
+ }
+ for (np = n->ncmd.redirect ; np ; np = np->nfile.next) {
+ cmdputs(spcstr);
+ cmdtxt(np);
+ }
+ } else if (n->type == NPIPE) {
+ struct nodelist *lp;
+ for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
+ cmdtxt(lp->n);
+ if (lp->next)
+ cmdputs(" | ");
+ }
+ } else if (n->type == NCASE) {
+ cmdputs(cmdtxt_strings[14]);
+ cmdputs(n->ncase.expr->narg.text);
+ cmdputs(cmdtxt_strings[13]);
+ } else {
+#if (NTO != 16) || (NFROM != 17) || (NFROMTO != 18) || (NAPPEND != 19) || (NTOOV != 20) || (NTOFD != 21) || (NFROMFD != 22)
+#error Assumption violated regarding range and ordering of NTO ... NFROMFD!
+#endif
+ char s[2];
+
+#ifdef DEBUG
+ assert((n->type >= NTO) && (n->type <= NFROMFD));
+#endif
+
+ p = redir_strings[n->type - NTO];
+ if (n->nfile.fd != ('>' == *p)) {
+ s[0] = n->nfile.fd + '0';
+ s[1] = '\0';
+ cmdputs(s);
+ }
+ cmdputs(p);
+ if (n->type >= NTOFD) {
+ s[0] = n->ndup.dupfd + '0';
+ s[1] = '\0';
+ cmdputs(s);
+ } else {
+ cmdtxt(n->nfile.fname);
+ }
+ }
+}
+#else /* CMDTXT_TABLE */
+static void
+cmdtxt(const union node *n)
+{
union node *np;
struct nodelist *lp;
const char *p;
break;
}
}
+#endif /* CMDTXT_TABLE */
+static char *
+commandtext(const union node *n)
+{
+ char *name;
-
-static void
-cmdputs(s)
- const char *s;
- {
- const char *p;
- char *q;
- char c;
- int subtype = 0;
-
- if (cmdnleft <= 0)
- return;
- p = s;
- q = cmdnextc;
- while ((c = *p++) != '\0') {
- if (c == CTLESC)
- *q++ = *p++;
- else if (c == CTLVAR) {
- *q++ = '$';
- if (--cmdnleft > 0)
- *q++ = '{';
- subtype = *p++;
- } else if (c == '=' && subtype != 0) {
- *q++ = "}-+?="[(subtype & VSTYPE) - VSNORMAL];
- subtype = 0;
- } else if (c == CTLENDVAR) {
- *q++ = '}';
- } else if (c == CTLBACKQ || c == CTLBACKQ+CTLQUOTE)
- cmdnleft++; /* ignore it */
- else
- *q++ = c;
- if (--cmdnleft <= 0) {
- *q++ = '.';
- *q++ = '.';
- *q++ = '.';
- break;
- }
- }
- cmdnextc = q;
+ cmdnextc = name = ckmalloc(MAXCMDTEXT);
+ cmdnleft = MAXCMDTEXT - 4;
+ cmdtxt(n);
+ *cmdnextc = '\0';
+ return name;
}
+
static void waitonint(int sig) {
intreceived = 1;
return;
}
-/* $NetBSD: mail.c,v 1.14 2000/07/03 03:26:19 matt Exp $ */
-
/*
* Routines to check for mail. (Perhaps make part of main.c?)
*/
#define MAXMBOXES 10
-static int nmboxes; /* number of mailboxes */
-static time_t mailtime[MAXMBOXES]; /* times of mailboxes */
+static int nmboxes; /* number of mailboxes */
+static time_t mailtime[MAXMBOXES]; /* times of mailboxes */
*/
static void
-chkmail(silent)
- int silent;
+chkmail(int silent)
{
int i;
const char *mpath;
if (q[-1] != '/')
abort();
#endif
- q[-1] = '\0'; /* delete trailing '/' */
-#ifdef notdef /* this is what the System V shell claims to do (it lies) */
- if (stat(p, &statb) < 0)
- statb.st_mtime = 0;
- if (statb.st_mtime > mailtime[i] && ! silent) {
- outfmt(
- &errout, snlfmt,
- pathopt? pathopt : "you have mail"
- );
- }
- mailtime[i] = statb.st_mtime;
-#else /* this is what it should do */
+ q[-1] = '\0'; /* delete trailing '/' */
if (stat(p, &statb) < 0)
statb.st_size = 0;
if (statb.st_size > mailtime[i] && ! silent) {
- outfmt(
- &errout, snlfmt,
- pathopt? pathopt : "you have mail"
- );
+ out2fmt(snlfmt,
+ pathopt? pathopt : "you have mail");
}
mailtime[i] = statb.st_size;
-#endif
}
nmboxes = i;
popstackmark(&smark);
}
-/* $NetBSD: main.c,v 1.40 2001/02/04 19:52:06 christos Exp $ */
-
#define PROFILE 0
-static int rootpid;
-static int rootshell;
#if PROFILE
-short profile_buf[16384];
+static short profile_buf[16384];
extern int etext();
#endif
-static void read_profile __P((const char *));
-static char *find_dot_file __P((char *));
-int shell_main __P((int, char **));
+static void read_profile (const char *);
+static void cmdloop (int);
+static void options (int);
+static void setoption (int, int);
+static void procargs (int, char **);
+
-extern int oexitstatus;
/*
* Main routine. We initialize things, parse the arguments, execute
* profiles if we're a login shell, and then call cmdloop to execute
*/
int
-shell_main(argc, argv)
+ash_main(argc, argv)
int argc;
char **argv;
{
struct jmploc jmploc;
struct stackmark smark;
volatile int state;
- char *shinit;
+ const char *shinit;
- DOTCMD = find_builtin(".");
BLTINCMD = find_builtin("builtin");
- COMMANDCMD = find_builtin("command");
EXECCMD = find_builtin("exec");
EVALCMD = find_builtin("eval");
+#ifndef BB_FEATURE_SH_FANCY_PROMPT
+ unsetenv("PS1");
+ unsetenv("PS2");
+#endif
+
#if PROFILE
monitor(4, etext, profile_buf, sizeof profile_buf, 50);
#endif
* exception EXSHELLPROC to clean up before executing
* the shell procedure.
*/
- switch (exception) {
- case EXSHELLPROC:
+ if (exception == EXSHELLPROC) {
rootpid = getpid();
rootshell = 1;
minusc = NULL;
state = 3;
- break;
-
- case EXEXEC:
- exitstatus = exerrno;
- break;
-
- case EXERROR:
- exitstatus = 2;
- break;
-
- default:
- break;
- }
-
- if (exception != EXSHELLPROC) {
+ } else {
+ if (exception == EXEXEC) {
+ exitstatus = exerrno;
+ } else if (exception == EXERROR) {
+ exitstatus = 2;
+ }
if (state == 0 || iflag == 0 || ! rootshell)
exitshell(exitstatus);
}
reset();
- if (exception == EXINT
-#if ATTY
- && (! attyset() || equal(termval(), "emacs"))
-#endif
- ) {
+ if (exception == EXINT) {
out2c('\n');
-#ifdef FLUSHERR
- flushout(out2);
-#endif
}
popstackmark(&smark);
- FORCEINTON; /* enable interrupts */
+ FORCEINTON; /* enable interrupts */
if (state == 1)
goto state1;
else if (state == 2)
state3:
state = 4;
if (sflag == 0 || minusc) {
- static int sigs[] = {
- SIGINT, SIGQUIT, SIGHUP,
+ static const char sigs[] = {
+ SIGINT, SIGQUIT, SIGHUP,
#ifdef SIGTSTP
SIGTSTP,
#endif
SIGPIPE
};
-#define SIGSSIZE (sizeof(sigs)/sizeof(sigs[0]))
+#define SIGSSIZE ((sizeof(sigs)/sizeof(sigs[0])) - 1) /* trailing nul */
int i;
for (i = 0; i < SIGSSIZE; i++)
evalstring(minusc, 0);
if (sflag || minusc == NULL) {
-state4: /* XXX ??? - why isn't this before the "if" statement */
+state4: /* XXX ??? - why isn't this before the "if" statement */
cmdloop(1);
}
#if PROFILE
*/
static void
-cmdloop(top)
- int top;
+cmdloop(int top)
{
union node *n;
struct stackmark smark;
inter++;
showjobs(1);
chkmail(0);
- flushout(&output);
+ flushall();
}
n = parsecmd(inter);
/* showtree(n); DEBUG */
const char *name;
{
int fd;
- int xflag_set = 0;
- int vflag_set = 0;
+ int xflag_save;
+ int vflag_save;
INTOFF;
if ((fd = open(name, O_RDONLY)) >= 0)
if (fd < 0)
return;
/* -q turns off -x and -v just when executing init files */
+ /* Note: Might do a little redundant work, but reduces code size. */
+ xflag_save = xflag;
+ vflag_save = vflag;
if (qflag) {
- if (xflag)
- xflag = 0, xflag_set = 1;
- if (vflag)
- vflag = 0, vflag_set = 1;
+ vflag = xflag = 0;
}
cmdloop(0);
- if (qflag) {
- if (xflag_set)
- xflag = 1;
- if (vflag_set)
- vflag = 1;
- }
+ xflag = xflag_save;
+ vflag = vflag_save;
popfile();
}
*/
static void
-readcmdfile(name)
- char *name;
+readcmdfile(const char *name)
{
int fd;
*/
-static char *
-find_dot_file(mybasename)
- char *mybasename;
+static inline char *
+find_dot_file(char *mybasename)
{
char *fullname;
const char *path = pathval();
for (sp = cmdenviron; sp ; sp = sp->next)
setvareq(savestr(sp->text), VSTRFIXED|VTEXTFIXED);
- if (argc >= 2) { /* That's what SVR2 does */
+ if (argc >= 2) { /* That's what SVR2 does */
char *fullname;
struct stackmark smark;
exitshell(exitstatus);
/* NOTREACHED */
}
-/* $NetBSD: memalloc.c,v 1.23 2000/11/01 19:56:01 christos Exp $ */
-/*
- * Parse trees for commands are allocated in lifo order, so we use a stack
- * to make this more efficient, and also to avoid all sorts of exception
- * handling code to handle interrupts in the middle of a parse.
- *
- * The size 504 was chosen because the Ultrix malloc handles that size
- * well.
- */
-
-#define MINSIZE 504 /* minimum size of a block */
-
-
-struct stack_block {
- struct stack_block *prev;
- char space[MINSIZE];
-};
-
-struct stack_block stackbase;
-struct stack_block *stackp = &stackbase;
-struct stackmark *markp;
-static char *stacknxt = stackbase.space;
-static int stacknleft = MINSIZE;
-static int sstrnleft;
-static int herefd = -1;
-
-
-
-pointer
-stalloc(nbytes)
- int nbytes;
+static pointer
+stalloc(int nbytes)
{
char *p;
static void
-stunalloc(p)
- pointer p;
- {
+stunalloc(pointer p)
+{
#ifdef DEBUG
- if (p == NULL) { /*DEBUG */
+ if (p == NULL) { /*DEBUG */
write(2, "stunalloc\n", 10);
abort();
}
}
-
static void
-setstackmark(mark)
- struct stackmark *mark;
- {
+setstackmark(struct stackmark *mark)
+{
mark->stackp = stackp;
mark->stacknxt = stacknxt;
mark->stacknleft = stacknleft;
static void
-popstackmark(mark)
- struct stackmark *mark;
- {
+popstackmark(struct stackmark *mark)
+{
struct stack_block *sp;
INTOFF;
*/
static void
-growstackblock() {
+growstackblock(void) {
char *p;
int newlen = ALIGN(stacknleft * 2 + 100);
char *oldspace = stacknxt;
stacknleft = newlen;
{
/* Stack marks pointing to the start of the old block
- * must be relocated to point to the new block
+ * must be relocated to point to the new block
*/
struct stackmark *xmark;
xmark = markp;
} else {
p = stalloc(newlen);
memcpy(p, oldspace, oldlen);
- stacknxt = p; /* free the space */
- stacknleft += newlen; /* we just allocated */
+ stacknxt = p; /* free the space */
+ stacknleft += newlen; /* we just allocated */
}
}
-static void
-grabstackblock(len)
- int len;
+static inline void
+grabstackblock(int len)
{
len = ALIGN(len);
stacknxt += len;
static char *
-growstackstr() {
+growstackstr(void) {
int len = stackblocksize();
if (herefd >= 0 && len >= 1024) {
xwrite(herefd, stackblock(), len);
static void
-ungrabstackstr(s, p)
- char *s;
- char *p;
- {
+ungrabstackstr(char *s, char *p)
+{
stacknleft += stacknxt - s;
stacknxt = s;
sstrnleft = stacknleft - (p - s);
}
-/* $NetBSD: miscbltin.c,v 1.30 2001/02/04 19:52:06 christos Exp $ */
-
/*
* Miscelaneous builtins.
*/
#undef rflag
-#ifdef __GLIBC__
-mode_t getmode(const void *, mode_t);
-static void *setmode(const char *);
-
#if !defined(__GLIBC__) || __GLIBC__ == 2 && __GLIBC_MINOR__ < 1
-typedef enum __rlimit_resource rlim_t;
-#endif
+typedef long rlim_t;
#endif
*/
static int
-readcmd(argc, argv)
- int argc;
- char **argv;
+readcmd(int argc, char **argv)
{
char **ap;
int backslash;
rflag = 1;
}
if (prompt && isatty(0)) {
- putprompt(prompt);
+ out2str(prompt); /* read without cmdedit */
flushall();
}
if (*(ap = argptr) == NULL)
int argc;
char **argv;
{
+ static const char permuser[3] = "ugo";
+ static const char permmode[3] = "rwx";
+ static const short int permmask[] = {
+ S_IRUSR, S_IWUSR, S_IXUSR,
+ S_IRGRP, S_IWGRP, S_IXGRP,
+ S_IROTH, S_IWOTH, S_IXOTH
+ };
+
char *ap;
- int mask;
+ mode_t mask;
int i;
int symbolic_mode = 0;
- while ((i = nextopt("S")) != '\0') {
+ while (nextopt("S") != '\0') {
symbolic_mode = 1;
}
if ((ap = *argptr) == NULL) {
if (symbolic_mode) {
- char u[4], g[4], o[4];
-
- i = 0;
- if ((mask & S_IRUSR) == 0)
- u[i++] = 'r';
- if ((mask & S_IWUSR) == 0)
- u[i++] = 'w';
- if ((mask & S_IXUSR) == 0)
- u[i++] = 'x';
- u[i] = '\0';
-
- i = 0;
- if ((mask & S_IRGRP) == 0)
- g[i++] = 'r';
- if ((mask & S_IWGRP) == 0)
- g[i++] = 'w';
- if ((mask & S_IXGRP) == 0)
- g[i++] = 'x';
- g[i] = '\0';
-
- i = 0;
- if ((mask & S_IROTH) == 0)
- o[i++] = 'r';
- if ((mask & S_IWOTH) == 0)
- o[i++] = 'w';
- if ((mask & S_IXOTH) == 0)
- o[i++] = 'x';
- o[i] = '\0';
-
- out1fmt("u=%s,g=%s,o=%s\n", u, g, o);
+ char buf[18];
+ char *p = buf;
+ for (i=0 ; i<3 ; i++) {
+ int j;
+ *p++ = permuser[i];
+ *p++ = '=';
+ for (j=0 ; j<3 ; j++) {
+ if ((mask & permmask[3*i+j]) == 0) {
+ *p++ = permmode[j];
+ }
+ }
+ *p++ = ',';
+ }
+ *--p = 0;
+ puts(buf);
} else {
- out1fmt("%.4o\n", mask);
+ printf("%.4o\n", mask);
}
} else {
- if (isdigit((unsigned char)*ap)) {
+ if (is_digit((unsigned char)*ap)) {
mask = 0;
do {
if (*ap >= '8' || *ap < '0')
} while (*++ap != '\0');
umask(mask);
} else {
- void *set;
-
- INTOFF;
- if ((set = setmode(ap)) != 0) {
- mask = getmode(set, ~mask & 0777);
- ckfree(set);
- }
- INTON;
- if (!set)
+ mask = ~mask & 0777;
+ if (parse_mode(ap, &mask) == FALSE) {
error("Illegal mode: %s", ap);
-
+ }
umask(~mask & 0777);
}
}
struct limits {
const char *name;
- int cmd;
- int factor; /* multiply by to get rlim_{cur,max} values */
- char option;
+ short cmd;
+ short factor; /* multiply by to get rlim_{cur,max} values */
};
static const struct limits limits[] = {
#ifdef RLIMIT_CPU
- { "time(seconds)", RLIMIT_CPU, 1, 't' },
+ { "time(seconds)", RLIMIT_CPU, 1 },
#endif
#ifdef RLIMIT_FSIZE
- { "file(blocks)", RLIMIT_FSIZE, 512, 'f' },
+ { "file(blocks)", RLIMIT_FSIZE, 512 },
#endif
#ifdef RLIMIT_DATA
- { "data(kbytes)", RLIMIT_DATA, 1024, 'd' },
+ { "data(kbytes)", RLIMIT_DATA, 1024 },
#endif
#ifdef RLIMIT_STACK
- { "stack(kbytes)", RLIMIT_STACK, 1024, 's' },
+ { "stack(kbytes)", RLIMIT_STACK, 1024 },
#endif
#ifdef RLIMIT_CORE
- { "coredump(blocks)", RLIMIT_CORE, 512, 'c' },
+ { "coredump(blocks)", RLIMIT_CORE, 512 },
#endif
#ifdef RLIMIT_RSS
- { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' },
+ { "memory(kbytes)", RLIMIT_RSS, 1024 },
#endif
#ifdef RLIMIT_MEMLOCK
- { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' },
+ { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024 },
#endif
#ifdef RLIMIT_NPROC
- { "process(processes)", RLIMIT_NPROC, 1, 'p' },
+ { "process(processes)", RLIMIT_NPROC, 1 },
#endif
#ifdef RLIMIT_NOFILE
- { "nofiles(descriptors)", RLIMIT_NOFILE, 1, 'n' },
+ { "nofiles(descriptors)", RLIMIT_NOFILE, 1 },
#endif
#ifdef RLIMIT_VMEM
- { "vmemory(kbytes)", RLIMIT_VMEM, 1024, 'v' },
+ { "vmemory(kbytes)", RLIMIT_VMEM, 1024 },
#endif
#ifdef RLIMIT_SWAP
- { "swap(kbytes)", RLIMIT_SWAP, 1024, 'w' },
+ { "swap(kbytes)", RLIMIT_SWAP, 1024 },
#endif
- { (char *) 0, 0, 0, '\0' }
+ { NULL, 0, 0 }
};
static int
int argc;
char **argv;
{
- int c;
+ static const char unlimited_string[] = "unlimited";
+ int c;
rlim_t val = 0;
enum { SOFT = 0x1, HARD = 0x2 }
how = SOFT | HARD;
- const struct limits *l;
- int set, all = 0;
- int optc, what;
- struct rlimit limit;
+ const struct limits *l;
+ int set, all = 0;
+ int optc, what;
+ struct rlimit limit;
what = 'f';
- while ((optc = nextopt("HSatfdsmcnpl")) != '\0')
- switch (optc) {
- case 'H':
+
+ while ((optc = nextopt("HSa"
+#ifdef RLIMIT_CPU
+ "t"
+#endif
+#ifdef RLIMIT_FSIZE
+ "f"
+#endif
+#ifdef RLIMIT_DATA
+ "d"
+#endif
+#ifdef RLIMIT_STACK
+ "s"
+#endif
+#ifdef RLIMIT_CORE
+ "c"
+#endif
+#ifdef RLIMIT_RSS
+ "m"
+#endif
+#ifdef RLIMIT_MEMLOCK
+ "l"
+#endif
+#ifdef RLIMIT_NPROC
+ "p"
+#endif
+#ifdef RLIMIT_NOFILE
+ "n"
+#endif
+#ifdef RLIMIT_VMEM
+ "v"
+#endif
+#ifdef RLIMIT_SWAP
+ "w"
+#endif
+ )) != '\0') {
+ if (optc == 'H') {
how = HARD;
- break;
- case 'S':
+ } else if (optc == 'S') {
how = SOFT;
- break;
- case 'a':
+ } else if (optc == 'a') {
all = 1;
- break;
- default:
+ } else {
what = optc;
}
+ }
- for (l = limits; l->name && l->option != what; l++)
- ;
- if (!l->name)
- error("internal error (%c)", what);
+ for (l = limits; l->name; l++) {
+ if(l->name[0] == what)
+ break;
+ if(l->name[1]=='w' && what=='w')
+ break;
+ }
set = *argptr ? 1 : 0;
if (set) {
if (all || argptr[1])
error("too many arguments");
- if (strcmp(p, "unlimited") == 0)
+ if (strcmp(p, unlimited_string) == 0)
val = RLIM_INFINITY;
else {
val = (rlim_t) 0;
val *= l->factor;
}
}
+
if (all) {
for (l = limits; l->name; l++) {
+ printf("%-20s ", l->name);
getrlimit(l->cmd, &limit);
+ OUTPUT_LIMIT:
if (how & SOFT)
val = limit.rlim_cur;
else if (how & HARD)
val = limit.rlim_max;
- out1fmt("%-20s ", l->name);
if (val == RLIM_INFINITY)
- out1fmt("unlimited\n");
+ puts(unlimited_string);
else
{
val /= l->factor;
-#ifdef BSD4_4
- out1fmt("%lld\n", (long long) val);
-#else
- out1fmt("%ld\n", (long) val);
-#endif
+ printf("%lld\n", (long long) val);
+ }
+ if (!all) {
+ break;
}
}
return 0;
}
- getrlimit(l->cmd, &limit);
- if (set) {
- if (how & HARD)
- limit.rlim_max = val;
- if (how & SOFT)
- limit.rlim_cur = val;
- if (setrlimit(l->cmd, &limit) < 0)
- error("error setting limit (%s)", strerror(errno));
- } else {
- if (how & SOFT)
- val = limit.rlim_cur;
- else if (how & HARD)
- val = limit.rlim_max;
-
- if (val == RLIM_INFINITY)
- out1fmt("unlimited\n");
- else
- {
- val /= l->factor;
-#ifdef BSD4_4
- out1fmt("%lld\n", (long long) val);
-#else
- out1fmt("%ld\n", (long) val);
-#endif
- }
+ if (!set) {
+ goto OUTPUT_LIMIT;
}
- return 0;
-}
-/* $NetBSD: mystring.c,v 1.14 1999/07/09 03:05:50 christos Exp $ */
-
-/*
- * String functions.
- *
- * equal(s1, s2) Return true if strings are equal.
- * scopy(from, to) Copy a string.
- * scopyn(from, to, n) Like scopy, but checks for overflow.
- * number(s) Convert a string of digits to an integer.
- * is_number(s) Return true if s is a string of digits.
- */
-
-static char nullstr[1]; /* zero length string */
-static const char spcstr[] = " ";
-static const char snlfmt[] = "%s\n";
-
-/*
- * equal - #defined in mystring.h
- */
-
-/*
- * scopy - #defined in mystring.h
- */
-
-
-#if 0
-/*
- * scopyn - copy a string from "from" to "to", truncating the string
- * if necessary. "To" is always nul terminated, even if
- * truncation is performed. "Size" is the size of "to".
- */
-
-static void
-scopyn(from, to, size)
- char const *from;
- char *to;
- int size;
- {
- while (--size > 0) {
- if ((*to++ = *from++) == '\0')
- return;
- }
- *to = '\0';
+ getrlimit(l->cmd, &limit);
+ if (how & HARD)
+ limit.rlim_max = val;
+ if (how & SOFT)
+ limit.rlim_cur = val;
+ if (setrlimit(l->cmd, &limit) < 0)
+ error("error setting limit (%m)");
+ return 0;
}
-#endif
-
-
/*
* prefix -- see if pfx is a prefix of string.
*/
static int
-prefix(pfx, string)
- char const *pfx;
- char const *string;
- {
+prefix(char const *pfx, char const *string)
+{
while (*pfx) {
if (*pfx++ != *string++)
return 0;
return 1;
}
-
/*
- * Convert a string of digits to an integer, printing an error message on
- * failure.
+ * Return true if s is a string of digits, and save munber in intptr
+ * nagative is bad
*/
static int
-number(s)
- const char *s;
- {
-
- if (! is_number(s))
- error("Illegal number: %s", s);
- return atoi(s);
-}
+is_number(const char *p, int *intptr)
+{
+ int ret = 0;
+ do {
+ if (! is_digit(*p))
+ return 0;
+ ret *= 10;
+ ret += digit_val(*p);
+ p++;
+ } while (*p != '\0');
+ *intptr = ret;
+ return 1;
+}
/*
- * Check for a valid number. This should be elsewhere.
+ * Convert a string of digits to an integer, printing an error message on
+ * failure.
*/
static int
-is_number(p)
- const char *p;
- {
- do {
- if (! is_digit(*p))
- return 0;
- } while (*++p != '\0');
- return 1;
+number(const char *s)
+{
+ int i;
+ if (! is_number(s, &i))
+ error("Illegal number: %s", s);
+ return i;
}
-
/*
* Produce a possibly single quoted string suitable as input to the shell.
* The return string is allocated on the stack.
len2 = strspn(s + len1, "'");
len1p = len1 ? len1 + 2 : len1;
- switch (len2) {
- case 0:
- len2p = 0;
- break;
- case 1:
- len2p = 2;
- break;
- default:
- len2p = len2 + 2;
- }
+ len2p = len2 + ((len2 < 2) ? len2 : 2);
CHECKSTRSPACE(len1p + len2p + 1, p);
if (len1) {
*p = '\'';
-#ifdef _GNU_SOURCE
- q = mempcpy(p + 1, s, len1);
-#else
q = p + 1 + len1;
- memcpy(p + 1, s, len1);
-#endif
- *q++ = '\'';
- s += len1;
- }
-
- switch (len2) {
- case 0:
- break;
- case 1:
- *q++ = '\\';
- *q = '\'';
- s++;
- break;
- default:
- *q = '"';
-#ifdef _GNU_SOURCE
- *(char *) mempcpy(q + 1, s, len2) = '"';
-#else
- q += 1 + len2;
- memcpy(q + 1, s, len2);
- *q = '"';
-#endif
- s += len2;
- }
-
- STADJUST(len1p + len2p, p);
- } while (*s);
-
- USTPUTC(0, p);
-
- return grabstackstr(p);
-}
-
-/*
- * Like strdup but works with the ash stack.
- */
-
-static char *
-sstrdup(const char *p)
-{
- size_t len = strlen(p) + 1;
- return memcpy(stalloc(len), p, len);
-}
-
-/*
- * Wrapper around strcmp for qsort/bsearch/...
- */
-static int
-pstrcmp(const void *a, const void *b)
-{
- return strcmp(*(const char *const *) a, *(const char *const *) b);
-}
-
-/*
- * Find a string is in a sorted array.
- */
-static const char *const *
-findstring(const char *s, const char *const *array, size_t nmemb)
-{
- return bsearch(&s, array, nmemb, sizeof(const char *), pstrcmp);
-}
-/*
- * This file was generated by the mknodes program.
- */
-
-/* $NetBSD: nodes.c.pat,v 1.8 1997/04/11 23:03:09 christos Exp $ */
-
-/*
- * Routine for dealing with parsed shell commands.
- */
-
-
-static int funcblocksize; /* size of structures in function */
-static int funcstringsize; /* size of strings in node */
-pointer funcblock; /* block to allocate function from */
-static char *funcstring; /* block to allocate strings from */
-
-static const short nodesize[26] = {
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct ncmd)),
- ALIGN(sizeof (struct npipe)),
- ALIGN(sizeof (struct nredir)),
- ALIGN(sizeof (struct nredir)),
- ALIGN(sizeof (struct nredir)),
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct nif)),
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct nbinary)),
- ALIGN(sizeof (struct nfor)),
- ALIGN(sizeof (struct ncase)),
- ALIGN(sizeof (struct nclist)),
- ALIGN(sizeof (struct narg)),
- ALIGN(sizeof (struct narg)),
- ALIGN(sizeof (struct nfile)),
- ALIGN(sizeof (struct nfile)),
- ALIGN(sizeof (struct nfile)),
- ALIGN(sizeof (struct nfile)),
- ALIGN(sizeof (struct nfile)),
- ALIGN(sizeof (struct ndup)),
- ALIGN(sizeof (struct ndup)),
- ALIGN(sizeof (struct nhere)),
- ALIGN(sizeof (struct nhere)),
- ALIGN(sizeof (struct nnot)),
-};
+ memcpy(p + 1, s, len1);
+ *q++ = '\'';
+ s += len1;
+ }
+ if (len2 > 1) {
+ *q = '"';
+ q += 1 + len2;
+ memcpy(q + 1, s, len2);
+ *q = '"';
+ s += len2;
+ } else if (len2 == 1) {
+ *q++ = '\\';
+ *q = '\'';
+ s++;
+ }
-static void calcsize __P((union node *));
-static void sizenodelist __P((struct nodelist *));
-static union node *copynode __P((union node *));
-static struct nodelist *copynodelist __P((struct nodelist *));
-static char *nodesavestr __P((char *));
+ STADJUST(len1p + len2p, p);
+ } while (*s);
+ USTPUTC(0, p);
+ return grabstackstr(p);
+}
/*
- * Make a copy of a parse tree.
+ * Like strdup but works with the ash stack.
*/
-union node *
-copyfunc(n)
- union node *n;
+static char *
+sstrdup(const char *p)
{
- if (n == NULL)
- return NULL;
- funcblocksize = 0;
- funcstringsize = 0;
- calcsize(n);
- funcblock = ckmalloc(funcblocksize + funcstringsize);
- funcstring = (char *) funcblock + funcblocksize;
- return copynode(n);
+ size_t len = strlen(p) + 1;
+ return memcpy(stalloc(len), p, len);
}
+/*
+ * Routine for dealing with parsed shell commands.
+ */
+
-static void
-calcsize(n)
- union node *n;
+static void sizenodelist (const struct nodelist *);
+static struct nodelist *copynodelist (const struct nodelist *);
+static char *nodesavestr (const char *);
+
+#define CALCSIZE_TABLE
+#define COPYNODE_TABLE
+#if defined(CALCSIZE_TABLE) || defined(COPYNODE_TABLE)
+/*
+ * To collect a lot of redundant code in case statements for copynode()
+ * and calcsize(), we implement a mini language here. Each type of node
+ * struct has an associated instruction sequence that operates on its
+ * members via their offsets. The instruction are pack in unsigned chars
+ * with format IIDDDDDE where the bits are
+ * I : part of the instruction opcode, which are
+ * 00 : member is a pointer to another node
+ * 40 : member is an integer
+ * 80 : member is a pointer to a nodelist
+ * CC : member is a pointer to a char string
+ * D : data - the actual offset of the member to operate on in the struct
+ * (since we assume bit 0 is set, it is not shifted)
+ * E : flag signaling end of instruction sequence
+ *
+ * WARNING: In order to handle larger offsets for 64bit archs, this code
+ * assumes that no offset can be an odd number and stores the
+ * end-of-instructions flag in bit 0.
+ */
+
+#define NODE_INTEGER 0x40
+#define NODE_NODELIST 0x80
+#define NODE_CHARPTR 0xC0
+#define NODE_NOMORE 0x01 /* Note: no offset should be odd (aligned)*/
+#define NODE_MBRMASK 0xC0
+#define NODE_OFFSETMASK 0x3E
+
+static const unsigned char copynode_ops[35] = {
+#define COPYNODE_OPS0 0
+ offsetof(union node, nbinary.ch2),
+ offsetof(union node, nbinary.ch1)|NODE_NOMORE,
+#define COPYNODE_OPS1 (COPYNODE_OPS0 + 2)
+ offsetof(union node, ncmd.redirect),
+ offsetof(union node, ncmd.args),
+ offsetof(union node, ncmd.assign),
+ offsetof(union node, ncmd.backgnd)|NODE_INTEGER|NODE_NOMORE,
+#define COPYNODE_OPS2 (COPYNODE_OPS1 + 4)
+ offsetof(union node, npipe.cmdlist)|NODE_NODELIST,
+ offsetof(union node, npipe.backgnd)|NODE_INTEGER|NODE_NOMORE,
+#define COPYNODE_OPS3 (COPYNODE_OPS2 + 2)
+ offsetof(union node, nredir.redirect),
+ offsetof(union node, nredir.n)|NODE_NOMORE,
+#define COPYNODE_OPS4 (COPYNODE_OPS3 + 2)
+ offsetof(union node, nif.elsepart),
+ offsetof(union node, nif.ifpart),
+ offsetof(union node, nif.test)|NODE_NOMORE,
+#define COPYNODE_OPS5 (COPYNODE_OPS4 + 3)
+ offsetof(union node, nfor.var)|NODE_CHARPTR,
+ offsetof(union node, nfor.body),
+ offsetof(union node, nfor.args)|NODE_NOMORE,
+#define COPYNODE_OPS6 (COPYNODE_OPS5 + 3)
+ offsetof(union node, ncase.cases),
+ offsetof(union node, ncase.expr)|NODE_NOMORE,
+#define COPYNODE_OPS7 (COPYNODE_OPS6 + 2)
+ offsetof(union node, nclist.body),
+ offsetof(union node, nclist.pattern),
+ offsetof(union node, nclist.next)|NODE_NOMORE,
+#define COPYNODE_OPS8 (COPYNODE_OPS7 + 3)
+ offsetof(union node, narg.backquote)|NODE_NODELIST,
+ offsetof(union node, narg.text)|NODE_CHARPTR,
+ offsetof(union node, narg.next)|NODE_NOMORE,
+#define COPYNODE_OPS9 (COPYNODE_OPS8 + 3)
+ offsetof(union node, nfile.fname),
+ offsetof(union node, nfile.fd)|NODE_INTEGER,
+ offsetof(union node, nfile.next)|NODE_NOMORE,
+#define COPYNODE_OPS10 (COPYNODE_OPS9 + 3)
+ offsetof(union node, ndup.vname),
+ offsetof(union node, ndup.dupfd)|NODE_INTEGER,
+ offsetof(union node, ndup.fd)|NODE_INTEGER,
+ offsetof(union node, ndup.next)|NODE_NOMORE,
+#define COPYNODE_OPS11 (COPYNODE_OPS10 + 4)
+ offsetof(union node, nhere.doc),
+ offsetof(union node, nhere.fd)|NODE_INTEGER,
+ offsetof(union node, nhere.next)|NODE_NOMORE,
+#define COPYNODE_OPS12 (COPYNODE_OPS11 + 3)
+ offsetof(union node, nnot.com)|NODE_NOMORE,
+};
+
+#if COPYNODE_OPS12 != 34
+#error COPYNODE_OPS12 is incorrect
+#endif
+
+static const unsigned char copynode_ops_index[26] = {
+ COPYNODE_OPS0, /* NSEMI */
+ COPYNODE_OPS1, /* NCMD */
+ COPYNODE_OPS2, /* NPIPE */
+ COPYNODE_OPS3, /* NREDIR */
+ COPYNODE_OPS3, /* NBACKGND */
+ COPYNODE_OPS3, /* NSUBSHELL */
+ COPYNODE_OPS0, /* NAND */
+ COPYNODE_OPS0, /* NOR */
+ COPYNODE_OPS4, /* NIF */
+ COPYNODE_OPS0, /* NWHILE */
+ COPYNODE_OPS0, /* NUNTIL */
+ COPYNODE_OPS5, /* NFOR */
+ COPYNODE_OPS6, /* NCASE */
+ COPYNODE_OPS7, /* NCLIST */
+ COPYNODE_OPS8, /* NDEFUN */
+ COPYNODE_OPS8, /* NARG */
+ COPYNODE_OPS9, /* NTO */
+ COPYNODE_OPS9, /* NFROM */
+ COPYNODE_OPS9, /* NFROMTO */
+ COPYNODE_OPS9, /* NAPPEND */
+ COPYNODE_OPS9, /* NTOOV */
+ COPYNODE_OPS10, /* NTOFD */
+ COPYNODE_OPS10, /* NFROMFD */
+ COPYNODE_OPS11, /* NHERE */
+ COPYNODE_OPS11, /* NXHERE */
+ COPYNODE_OPS12, /* NNOT */
+};
+
+#if NODE_CHARPTR != NODE_MBRMASK
+#error NODE_CHARPTR != NODE_MBRMASK!!!
+#endif
+#endif /* defined(CALCSIZE_TABLE) || defined(COPYNODE_TABLE) */
+
+#ifdef COPYNODE_TABLE
+static union node *
+copynode(const union node *n)
+{
+ union node *new;
+ const unsigned char *p;
+
+ if (n == NULL) {
+ return NULL;
+ }
+ new = funcblock;
+ new->type = n->type;
+ funcblock = (char *) funcblock + (int) nodesize[n->type];
+ p = copynode_ops + (int) copynode_ops_index[n->type];
+ do {
+ char *nn = ((char *) new) + ((int)(*p & NODE_OFFSETMASK));
+ const char *no = ((const char *) n) + ((int)(*p & NODE_OFFSETMASK));
+
+ if (!(*p & NODE_MBRMASK)) { /* standard node */
+ *((union node **)nn) = copynode(*((const union node **) no));
+ } else if ((*p & NODE_MBRMASK) == NODE_CHARPTR) { /* string */
+ *((const char **)nn) = nodesavestr(*((const char **)no));
+ } else if (*p & NODE_NODELIST) { /* nodelist */
+ *((struct nodelist **)nn)
+ = copynodelist(*((const struct nodelist **) no));
+ } else { /* integer */
+ *((int *) nn) = *((int *) no);
+ }
+ } while (!(*p++ & NODE_NOMORE));
+ return new;
+}
+#else /* COPYNODE_TABLE */
+static union node *
+copynode(const union node *n)
{
+ union node *new;
+
if (n == NULL)
- return;
- funcblocksize += nodesize[n->type];
+ return NULL;
+ new = funcblock;
+ funcblock = (char *) funcblock + nodesize[n->type];
switch (n->type) {
case NSEMI:
case NAND:
case NOR:
case NWHILE:
case NUNTIL:
- calcsize(n->nbinary.ch2);
- calcsize(n->nbinary.ch1);
+ new->nbinary.ch2 = copynode(n->nbinary.ch2);
+ new->nbinary.ch1 = copynode(n->nbinary.ch1);
break;
case NCMD:
- calcsize(n->ncmd.redirect);
- calcsize(n->ncmd.args);
- calcsize(n->ncmd.assign);
+ new->ncmd.redirect = copynode(n->ncmd.redirect);
+ new->ncmd.args = copynode(n->ncmd.args);
+ new->ncmd.assign = copynode(n->ncmd.assign);
+ new->ncmd.backgnd = n->ncmd.backgnd;
break;
case NPIPE:
- sizenodelist(n->npipe.cmdlist);
+ new->npipe.cmdlist = copynodelist(n->npipe.cmdlist);
+ new->npipe.backgnd = n->npipe.backgnd;
break;
case NREDIR:
case NBACKGND:
case NSUBSHELL:
- calcsize(n->nredir.redirect);
- calcsize(n->nredir.n);
+ new->nredir.redirect = copynode(n->nredir.redirect);
+ new->nredir.n = copynode(n->nredir.n);
break;
case NIF:
- calcsize(n->nif.elsepart);
- calcsize(n->nif.ifpart);
- calcsize(n->nif.test);
+ new->nif.elsepart = copynode(n->nif.elsepart);
+ new->nif.ifpart = copynode(n->nif.ifpart);
+ new->nif.test = copynode(n->nif.test);
break;
case NFOR:
- funcstringsize += strlen(n->nfor.var) + 1;
- calcsize(n->nfor.body);
- calcsize(n->nfor.args);
+ new->nfor.var = nodesavestr(n->nfor.var);
+ new->nfor.body = copynode(n->nfor.body);
+ new->nfor.args = copynode(n->nfor.args);
break;
case NCASE:
- calcsize(n->ncase.cases);
- calcsize(n->ncase.expr);
+ new->ncase.cases = copynode(n->ncase.cases);
+ new->ncase.expr = copynode(n->ncase.expr);
break;
case NCLIST:
- calcsize(n->nclist.body);
- calcsize(n->nclist.pattern);
- calcsize(n->nclist.next);
+ new->nclist.body = copynode(n->nclist.body);
+ new->nclist.pattern = copynode(n->nclist.pattern);
+ new->nclist.next = copynode(n->nclist.next);
break;
case NDEFUN:
case NARG:
- sizenodelist(n->narg.backquote);
- funcstringsize += strlen(n->narg.text) + 1;
- calcsize(n->narg.next);
+ new->narg.backquote = copynodelist(n->narg.backquote);
+ new->narg.text = nodesavestr(n->narg.text);
+ new->narg.next = copynode(n->narg.next);
break;
case NTO:
case NFROM:
case NFROMTO:
case NAPPEND:
case NTOOV:
- calcsize(n->nfile.fname);
- calcsize(n->nfile.next);
+ new->nfile.fname = copynode(n->nfile.fname);
+ new->nfile.fd = n->nfile.fd;
+ new->nfile.next = copynode(n->nfile.next);
break;
case NTOFD:
case NFROMFD:
- calcsize(n->ndup.vname);
- calcsize(n->ndup.next);
+ new->ndup.vname = copynode(n->ndup.vname);
+ new->ndup.dupfd = n->ndup.dupfd;
+ new->ndup.fd = n->ndup.fd;
+ new->ndup.next = copynode(n->ndup.next);
break;
case NHERE:
case NXHERE:
- calcsize(n->nhere.doc);
- calcsize(n->nhere.next);
+ new->nhere.doc = copynode(n->nhere.doc);
+ new->nhere.fd = n->nhere.fd;
+ new->nhere.next = copynode(n->nhere.next);
break;
case NNOT:
- calcsize(n->nnot.com);
+ new->nnot.com = copynode(n->nnot.com);
break;
};
+ new->type = n->type;
+ return new;
}
+#endif /* COPYNODE_TABLE */
-
-
+#ifdef CALCSIZE_TABLE
static void
-sizenodelist(lp)
- struct nodelist *lp;
+calcsize(const union node *n)
{
- while (lp) {
- funcblocksize += ALIGN(sizeof(struct nodelist));
- calcsize(lp->n);
- lp = lp->next;
- }
-}
+ const unsigned char *p;
+ if (n == NULL)
+ return;
+ funcblocksize += (int) nodesize[n->type];
+ p = copynode_ops + (int) copynode_ops_index[n->type];
+ do {
+ const char *no = ((const char *) n) + ((int)(*p & NODE_OFFSETMASK));
-static union node *
-copynode(n)
- union node *n;
+ if (!(*p & NODE_MBRMASK)) { /* standard node */
+ calcsize(*((const union node **) no));
+ } else if ((*p & NODE_MBRMASK) == NODE_CHARPTR) { /* string */
+ funcstringsize += strlen(*((const char **)no)) + 1;
+ } else if (*p & NODE_NODELIST) { /* nodelist */
+ sizenodelist(*((const struct nodelist **) no));
+ } /* else integer -- ignore */
+ } while (!(*p++ & NODE_NOMORE));
+}
+#else /* CALCSIZE_TABLE */
+static void
+calcsize(const union node *n)
{
- union node *new;
-
if (n == NULL)
- return NULL;
- new = funcblock;
- funcblock = (char *) funcblock + nodesize[n->type];
+ return;
+ funcblocksize += nodesize[n->type];
switch (n->type) {
case NSEMI:
case NAND:
case NOR:
case NWHILE:
case NUNTIL:
- new->nbinary.ch2 = copynode(n->nbinary.ch2);
- new->nbinary.ch1 = copynode(n->nbinary.ch1);
+ calcsize(n->nbinary.ch2);
+ calcsize(n->nbinary.ch1);
break;
case NCMD:
- new->ncmd.redirect = copynode(n->ncmd.redirect);
- new->ncmd.args = copynode(n->ncmd.args);
- new->ncmd.assign = copynode(n->ncmd.assign);
- new->ncmd.backgnd = n->ncmd.backgnd;
+ calcsize(n->ncmd.redirect);
+ calcsize(n->ncmd.args);
+ calcsize(n->ncmd.assign);
break;
case NPIPE:
- new->npipe.cmdlist = copynodelist(n->npipe.cmdlist);
- new->npipe.backgnd = n->npipe.backgnd;
+ sizenodelist(n->npipe.cmdlist);
break;
case NREDIR:
case NBACKGND:
case NSUBSHELL:
- new->nredir.redirect = copynode(n->nredir.redirect);
- new->nredir.n = copynode(n->nredir.n);
+ calcsize(n->nredir.redirect);
+ calcsize(n->nredir.n);
break;
case NIF:
- new->nif.elsepart = copynode(n->nif.elsepart);
- new->nif.ifpart = copynode(n->nif.ifpart);
- new->nif.test = copynode(n->nif.test);
+ calcsize(n->nif.elsepart);
+ calcsize(n->nif.ifpart);
+ calcsize(n->nif.test);
break;
case NFOR:
- new->nfor.var = nodesavestr(n->nfor.var);
- new->nfor.body = copynode(n->nfor.body);
- new->nfor.args = copynode(n->nfor.args);
+ funcstringsize += strlen(n->nfor.var) + 1;
+ calcsize(n->nfor.body);
+ calcsize(n->nfor.args);
break;
case NCASE:
- new->ncase.cases = copynode(n->ncase.cases);
- new->ncase.expr = copynode(n->ncase.expr);
+ calcsize(n->ncase.cases);
+ calcsize(n->ncase.expr);
break;
case NCLIST:
- new->nclist.body = copynode(n->nclist.body);
- new->nclist.pattern = copynode(n->nclist.pattern);
- new->nclist.next = copynode(n->nclist.next);
+ calcsize(n->nclist.body);
+ calcsize(n->nclist.pattern);
+ calcsize(n->nclist.next);
break;
case NDEFUN:
case NARG:
- new->narg.backquote = copynodelist(n->narg.backquote);
- new->narg.text = nodesavestr(n->narg.text);
- new->narg.next = copynode(n->narg.next);
+ sizenodelist(n->narg.backquote);
+ funcstringsize += strlen(n->narg.text) + 1;
+ calcsize(n->narg.next);
break;
case NTO:
case NFROM:
case NFROMTO:
case NAPPEND:
case NTOOV:
- new->nfile.fname = copynode(n->nfile.fname);
- new->nfile.fd = n->nfile.fd;
- new->nfile.next = copynode(n->nfile.next);
+ calcsize(n->nfile.fname);
+ calcsize(n->nfile.next);
break;
case NTOFD:
case NFROMFD:
- new->ndup.vname = copynode(n->ndup.vname);
- new->ndup.dupfd = n->ndup.dupfd;
- new->ndup.fd = n->ndup.fd;
- new->ndup.next = copynode(n->ndup.next);
+ calcsize(n->ndup.vname);
+ calcsize(n->ndup.next);
break;
case NHERE:
case NXHERE:
- new->nhere.doc = copynode(n->nhere.doc);
- new->nhere.fd = n->nhere.fd;
- new->nhere.next = copynode(n->nhere.next);
+ calcsize(n->nhere.doc);
+ calcsize(n->nhere.next);
break;
case NNOT:
- new->nnot.com = copynode(n->nnot.com);
+ calcsize(n->nnot.com);
break;
};
- new->type = n->type;
- return new;
+}
+#endif /* CALCSIZE_TABLE */
+
+static void
+sizenodelist(const struct nodelist *lp)
+{
+ while (lp) {
+ funcblocksize += ALIGN(sizeof(struct nodelist));
+ calcsize(lp->n);
+ lp = lp->next;
+ }
}
static struct nodelist *
-copynodelist(lp)
- struct nodelist *lp;
+copynodelist(const struct nodelist *lp)
{
struct nodelist *start;
struct nodelist **lpp;
}
-
static char *
-nodesavestr(s)
- char *s;
+nodesavestr(const char *s)
{
-#ifdef _GNU_SOURCE
- char *rtn = funcstring;
-
- funcstring = stpcpy(funcstring, s) + 1;
- return rtn;
-#else
- register char *p = s;
- register char *q = funcstring;
+ const char *p = s;
+ char *q = funcstring;
char *rtn = funcstring;
while ((*q++ = *p++) != '\0')
continue;
funcstring = q;
return rtn;
-#endif
-}
-
-
-
-/*
- * Free a parse tree.
- */
-
-static void
-freefunc(n)
- union node *n;
-{
- if (n)
- ckfree(n);
}
-/* $NetBSD: options.c,v 1.31 2001/02/26 13:06:43 wiz Exp $ */
-
-
-struct optent optlist[NOPTS] = {
- { "errexit", 'e', 0 },
- { "noglob", 'f', 0 },
- { "ignoreeof", 'I', 0 },
- { "interactive",'i', 0 },
- { "monitor", 'm', 0 },
- { "noexec", 'n', 0 },
- { "stdin", 's', 0 },
- { "xtrace", 'x', 0 },
- { "verbose", 'v', 0 },
- { "vi", 'V', 0 },
- { "emacs", 'E', 0 },
- { "noclobber", 'C', 0 },
- { "allexport", 'a', 0 },
- { "notify", 'b', 0 },
- { "nounset", 'u', 0 },
- { "quietprofile", 'q', 0 },
-};
-static char *arg0; /* value of $0 */
-struct shparam shellparam; /* current positional parameters */
-static char **argptr; /* argument list for builtin commands */
-static char *optionarg; /* set by nextopt (like getopt) */
-static char *optptr; /* used by nextopt */
-
-static char *minusc; /* argument to -c option */
-
-static void options __P((int));
-static void minus_o __P((char *, int));
-static void setoption __P((int, int));
#ifdef ASH_GETOPTS
-static int getopts __P((char *, char *, char **, int *, int *));
+static int getopts (char *, char *, char **, int *, int *);
#endif
if (argc > 0)
argptr++;
for (i = 0; i < NOPTS; i++)
- optlist[i].val = 2;
+ optent_val(i) = 2;
options(1);
if (*argptr == NULL && minusc == NULL)
sflag = 1;
if (mflag == 2)
mflag = iflag;
for (i = 0; i < NOPTS; i++)
- if (optlist[i].val == 2)
- optlist[i].val = 0;
+ if (optent_val(i) == 2)
+ optent_val(i) = 0;
arg0 = argv[0];
if (sflag == 0 && minusc == NULL) {
commandname = argv[0];
}
/* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
if (argptr && minusc && *argptr)
- arg0 = *argptr++;
+ arg0 = *argptr++;
shellparam.p = argptr;
shellparam.optind = 1;
}
-static void
-optschanged()
+
+/*
+ * Process shell options. The global variable argptr contains a pointer
+ * to the argument list; we advance it past the options.
+ */
+
+static inline void
+minus_o(const char *name, int val)
{
- setinteractive(iflag);
- setjobctl(mflag);
+ int i;
+
+ if (name == NULL) {
+ out1str("Current option settings\n");
+ for (i = 0; i < NOPTS; i++)
+ printf("%-16s%s\n", optent_name(optlist[i]),
+ optent_val(i) ? "on" : "off");
+ } else {
+ for (i = 0; i < NOPTS; i++)
+ if (equal(name, optent_name(optlist[i]))) {
+ setoption(optent_letter(optlist[i]), val);
+ return;
+ }
+ error("Illegal option -o %s", name);
+ }
}
-/*
- * Process shell options. The global variable argptr contains a pointer
- * to the argument list; we advance it past the options.
- */
static void
-options(cmdline)
- int cmdline;
+options(int cmdline)
{
char *p;
int val;
argptr++;
if ((c = *p++) == '-') {
val = 1;
- if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
- if (!cmdline) {
- /* "-" means turn off -x and -v */
- if (p[0] == '\0')
- xflag = vflag = 0;
- /* "--" means reset params */
- else if (*argptr == NULL)
+ if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
+ if (!cmdline) {
+ /* "-" means turn off -x and -v */
+ if (p[0] == '\0')
+ xflag = vflag = 0;
+ /* "--" means reset params */
+ else if (*argptr == NULL)
setparam(argptr);
- }
- break; /* "-" or "--" terminates options */
+ }
+ break; /* "-" or "--" terminates options */
}
} else if (c == '+') {
val = 0;
while ((c = *p++) != '\0') {
if (c == 'c' && cmdline) {
char *q;
-#ifdef NOHACK /* removing this code allows sh -ce 'foo' for compat */
+#ifdef NOHACK /* removing this code allows sh -ce 'foo' for compat */
if (*p == '\0')
#endif
q = *argptr++;
}
}
-static void
-minus_o(name, val)
- char *name;
- int val;
-{
- int i;
-
- if (name == NULL) {
- out1str("Current option settings\n");
- for (i = 0; i < NOPTS; i++)
- out1fmt("%-16s%s\n", optlist[i].name,
- optlist[i].val ? "on" : "off");
- } else {
- for (i = 0; i < NOPTS; i++)
- if (equal(name, optlist[i].name)) {
- setoption(optlist[i].letter, val);
- return;
- }
- error("Illegal option -o %s", name);
- }
-}
-
static void
-setoption(flag, val)
- char flag;
- int val;
- {
+setoption(int flag, int val)
+{
int i;
for (i = 0; i < NOPTS; i++)
- if (optlist[i].letter == flag) {
- optlist[i].val = val;
+ if (optent_letter(optlist[i]) == flag) {
+ optent_val(i) = val;
if (val) {
/* #%$ hack for ksh semantics */
if (flag == 'V')
-#ifdef mkinit
-SHELLPROC {
- int i;
-
- for (i = 0; i < NOPTS; i++)
- optlist[i].val = 0;
- optschanged();
-
-}
-#endif
-
-
/*
* Set the shell parameters.
*/
static void
-setparam(argv)
- char **argv;
- {
+setparam(char **argv)
+{
char **newparam;
char **ap;
int nparam;
*/
static void
-freeparam(param)
- volatile struct shparam *param;
- {
+freeparam(volatile struct shparam *param)
+{
char **ap;
if (param->malloc) {
static void
-getoptsreset(value)
- const char *value;
+getoptsreset(const char *value)
{
shellparam.optind = number(value);
shellparam.optoff = -1;
}
+#ifdef BB_LOCALE_SUPPORT
+static void change_lc_all(const char *value)
+{
+ if(value != 0 && *value != 0)
+ setlocale(LC_ALL, value);
+}
+
+static void change_lc_ctype(const char *value)
+{
+ if(value != 0 && *value != 0)
+ setlocale(LC_CTYPE, value);
+}
+
+#endif
+
#ifdef ASH_GETOPTS
/*
* The getopts builtin. Shellparam.optnext points to the next argument
goto out;
}
optnext++;
- if (p[0] == '-' && p[1] == '\0') /* check for "--" */
+ if (p[0] == '-' && p[1] == '\0') /* check for "--" */
goto atend;
}
err |= setvarsafe("OPTARG", s, 0);
}
else {
- outfmt(&errout, "Illegal option -%c\n", c);
+ out2fmt("Illegal option -%c\n", c);
(void) unsetvar("OPTARG");
}
c = '?';
c = ':';
}
else {
- outfmt(&errout, "No arg for -%c option\n", c);
+ out2fmt("No arg for -%c option\n", c);
(void) unsetvar("OPTARG");
c = '?';
}
p = NULL;
out:
*optoff = p ? p - *(optnext - 1) : -1;
- fmtstr(s, sizeof(s), "%d", *myoptind);
+ snprintf(s, sizeof(s), "%d", *myoptind);
err |= setvarsafe("OPTIND", s, VNOFUNC);
s[0] = c;
s[1] = '\0';
if (err) {
*myoptind = 1;
*optoff = -1;
- flushall();
exraise(EXERROR);
}
return done;
}
-#endif
+#endif
/*
* XXX - should get rid of. have all builtins use getopt(3). the
*/
static int
-nextopt(optstring)
- const char *optstring;
- {
+nextopt(const char *optstring)
+{
char *p;
const char *q;
char c;
if (p == NULL || *p != '-' || *++p == '\0')
return '\0';
argptr++;
- if (p[0] == '-' && p[1] == '\0') /* check for "--" */
+ if (p[0] == '-' && p[1] == '\0') /* check for "--" */
return '\0';
}
c = *p++;
if (*++q == ':') {
if (*p == '\0' && (p = *argptr++) == NULL)
error("No arg for -%c option", c);
- optionarg = p;
- p = NULL;
- }
- optptr = p;
- return c;
-}
-
-
-/* $NetBSD: output.c,v 1.23 2001/01/07 23:39:07 lukem Exp $ */
-
-/*
- * Shell output routines. We use our own output routines because:
- * When a builtin command is interrupted we have to discard
- * any pending output.
- * When a builtin command appears in back quotes, we want to
- * save the output of the command in a region obtained
- * via malloc, rather than doing a fork and reading the
- * output of the command via a pipe.
- * Our output routines may be smaller than the stdio routines.
- */
-
-
-#define OUTBUFSIZ BUFSIZ
-#define MEM_OUT -3 /* output to dynamically allocated memory */
-
-
-#ifdef USE_GLIBC_STDIO
-struct output output = {NULL, NULL, 0, NULL, 0, 1, 0};
-struct output errout = {NULL, NULL, 0, NULL, 0, 2, 0};
-struct output memout = {NULL, NULL, 0, NULL, 0, MEM_OUT, 0};
-#else
-struct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0};
-struct output errout = {NULL, 0, NULL, 0, 2, 0};
-struct output memout = {NULL, 0, NULL, 0, MEM_OUT, 0};
-#endif
-struct output *out1 = &output;
-struct output *out2 = &errout;
-
-
-#ifndef USE_GLIBC_STDIO
-static void __outstr __P((const char *, size_t, struct output*));
-#endif
-
-
-#ifdef mkinit
-
-INCLUDE "output.h"
-INCLUDE "memalloc.h"
-
-INIT {
-#ifdef USE_GLIBC_STDIO
- initstreams();
-#endif
-}
-
-RESET {
- out1 = &output;
- out2 = &errout;
-#ifdef USE_GLIBC_STDIO
- if (memout.stream != NULL)
- __closememout();
-#endif
- if (memout.buf != NULL) {
- ckfree(memout.buf);
- memout.buf = NULL;
- }
-}
-
-#endif
-
-
-#ifndef USE_GLIBC_STDIO
-static void
-__outstr(const char *p, size_t len, struct output *dest) {
- if (!dest->bufsize) {
- dest->nleft = 0;
- } else if (dest->buf == NULL) {
- if (len > dest->bufsize && dest->fd == MEM_OUT) {
- dest->bufsize = len;
- }
- INTOFF;
- dest->buf = ckmalloc(dest->bufsize);
- dest->nextc = dest->buf;
- dest->nleft = dest->bufsize;
- INTON;
- } else if (dest->fd == MEM_OUT) {
- int offset;
-
- offset = dest->bufsize;
- INTOFF;
- if (dest->bufsize >= len) {
- dest->bufsize <<= 1;
- } else {
- dest->bufsize += len;
- }
- dest->buf = ckrealloc(dest->buf, dest->bufsize);
- dest->nleft = dest->bufsize - offset;
- dest->nextc = dest->buf + offset;
- INTON;
- } else {
- flushout(dest);
- }
-
- if (len < dest->nleft) {
- dest->nleft -= len;
- memcpy(dest->nextc, p, len);
- dest->nextc += len;
- return;
- }
-
- if (xwrite(dest->fd, p, len) < len)
- dest->flags |= OUTPUT_ERR;
-}
-#endif
-
-
-static void
-outstr(p, file)
- const char *p;
- struct output *file;
- {
-#ifdef USE_GLIBC_STDIO
- INTOFF;
- fputs(p, file->stream);
- INTON;
-#else
- size_t len;
-
- if (!*p) {
- return;
- }
- len = strlen(p);
- if ((file->nleft -= len) > 0) {
- memcpy(file->nextc, p, len);
- file->nextc += len;
- return;
- }
- __outstr(p, len, file);
-#endif
-}
-
-
-#ifndef USE_GLIBC_STDIO
-
-
-static void
-outcslow(c, dest)
- char c;
- struct output *dest;
- {
- __outstr(&c, 1, dest);
-}
-#endif
-
-
-static void
-flushall() {
- flushout(&output);
-#ifdef FLUSHERR
- flushout(&errout);
-#endif
-}
-
-
-static void
-flushout(dest)
- struct output *dest;
- {
-#ifdef USE_GLIBC_STDIO
- INTOFF;
- fflush(dest->stream);
- INTON;
-#else
- size_t len;
-
- len = dest->nextc - dest->buf;
- if (dest->buf == NULL || !len || dest->fd < 0)
- return;
- dest->nextc = dest->buf;
- dest->nleft = dest->bufsize;
- if (xwrite(dest->fd, dest->buf, len) < len)
- dest->flags |= OUTPUT_ERR;
-#endif
-}
-
-
-static void
-freestdout() {
- if (output.buf) {
- INTOFF;
- ckfree(output.buf);
- output.buf = NULL;
- output.nleft = 0;
- INTON;
- }
- output.flags = 0;
-}
-
-
-static void
-#ifdef __STDC__
-outfmt(struct output *file, const char *fmt, ...)
-#else
-static void
-outfmt(va_alist)
- va_dcl
-#endif
-{
- va_list ap;
-#ifndef __STDC__
- struct output *file;
- const char *fmt;
-
- va_start(ap);
- file = va_arg(ap, struct output *);
- fmt = va_arg(ap, const char *);
-#else
- va_start(ap, fmt);
-#endif
- doformat(file, fmt, ap);
- va_end(ap);
-}
-
-
-static void
-#ifdef __STDC__
-out1fmt(const char *fmt, ...)
-#else
-out1fmt(va_alist)
- va_dcl
-#endif
-{
- va_list ap;
-#ifndef __STDC__
- const char *fmt;
-
- va_start(ap);
- fmt = va_arg(ap, const char *);
-#else
- va_start(ap, fmt);
-#endif
- doformat(out1, fmt, ap);
- va_end(ap);
-}
-
-static void
-#ifdef __STDC__
-fmtstr(char *outbuf, size_t length, const char *fmt, ...)
-#else
-fmtstr(va_alist)
- va_dcl
-#endif
-{
- va_list ap;
-#ifndef __STDC__
- char *outbuf;
- size_t length;
- const char *fmt;
-
- va_start(ap);
- outbuf = va_arg(ap, char *);
- length = va_arg(ap, size_t);
- fmt = va_arg(ap, const char *);
-#else
- va_start(ap, fmt);
-#endif
- INTOFF;
- vsnprintf(outbuf, length, fmt, ap);
- INTON;
-}
-
-#ifndef USE_GLIBC_STDIO
-/*
- * Formatted output. This routine handles a subset of the printf formats:
- * - Formats supported: d, u, o, p, X, s, and c.
- * - The x format is also accepted but is treated like X.
- * - The l, ll and q modifiers are accepted.
- * - The - and # flags are accepted; # only works with the o format.
- * - Width and precision may be specified with any format except c.
- * - An * may be given for the width or precision.
- * - The obsolete practice of preceding the width with a zero to get
- * zero padding is not supported; use the precision field.
- * - A % may be printed by writing %% in the format string.
- */
-
-#define TEMPSIZE 24
-
-#ifdef BSD4_4
-#define HAVE_VASPRINTF 1
-#endif
-
-#if !HAVE_VASPRINTF
-static const char digit[] = "0123456789ABCDEF";
-#endif
-
-
-static void
-doformat(dest, f, ap)
- struct output *dest;
- const char *f; /* format string */
- va_list ap;
-{
-#if HAVE_VASPRINTF
- char *s, *t;
- int len;
-
- INTOFF;
- len = vasprintf(&t, f, ap);
- if (len < 0) {
- return;
- }
- s = stalloc(++len);
- memcpy(s, t, len);
- free(t);
- INTON;
- outstr(s, dest);
- stunalloc(s);
-#else /* !HAVE_VASPRINTF */
- char c;
- char temp[TEMPSIZE];
- int flushleft;
- int sharp;
- int width;
- int prec;
- int islong;
- int isquad;
- char *p;
- int sign;
-#ifdef BSD4_4
- quad_t l;
- u_quad_t num;
-#else
- long l;
- u_long num;
-#endif
- unsigned base;
- int len;
- int size;
- int pad;
-
- while ((c = *f++) != '\0') {
- if (c != '%') {
- outc(c, dest);
- continue;
- }
- flushleft = 0;
- sharp = 0;
- width = 0;
- prec = -1;
- islong = 0;
- isquad = 0;
- for (;;) {
- if (*f == '-')
- flushleft++;
- else if (*f == '#')
- sharp++;
- else
- break;
- f++;
- }
- if (*f == '*') {
- width = va_arg(ap, int);
- f++;
- } else {
- while (is_digit(*f)) {
- width = 10 * width + digit_val(*f++);
- }
- }
- if (*f == '.') {
- if (*++f == '*') {
- prec = va_arg(ap, int);
- f++;
- } else {
- prec = 0;
- while (is_digit(*f)) {
- prec = 10 * prec + digit_val(*f++);
- }
- }
- }
- if (*f == 'l') {
- f++;
- if (*f == 'l') {
- isquad++;
- f++;
- } else
- islong++;
- } else if (*f == 'q') {
- isquad++;
- f++;
- }
- switch (*f) {
- case 'd':
-#ifdef BSD4_4
- if (isquad)
- l = va_arg(ap, quad_t);
- else
-#endif
- if (islong)
- l = va_arg(ap, long);
- else
- l = va_arg(ap, int);
- sign = 0;
- num = l;
- if (l < 0) {
- num = -l;
- sign = 1;
- }
- base = 10;
- goto number;
- case 'u':
- base = 10;
- goto uns_number;
- case 'o':
- base = 8;
- goto uns_number;
- case 'p':
- outc('0', dest);
- outc('x', dest);
- /*FALLTHROUGH*/
- case 'x':
- /* we don't implement 'x'; treat like 'X' */
- case 'X':
- base = 16;
-uns_number: /* an unsigned number */
- sign = 0;
-#ifdef BSD4_4
- if (isquad)
- num = va_arg(ap, u_quad_t);
- else
-#endif
- if (islong)
- num = va_arg(ap, unsigned long);
- else
- num = va_arg(ap, unsigned int);
-number: /* process a number */
- p = temp + TEMPSIZE - 1;
- *p = '\0';
- while (num) {
- *--p = digit[num % base];
- num /= base;
- }
- len = (temp + TEMPSIZE - 1) - p;
- if (prec < 0)
- prec = 1;
- if (sharp && *f == 'o' && prec <= len)
- prec = len + 1;
- pad = 0;
- if (width) {
- size = len;
- if (size < prec)
- size = prec;
- size += sign;
- pad = width - size;
- if (flushleft == 0) {
- while (--pad >= 0)
- outc(' ', dest);
- }
- }
- if (sign)
- outc('-', dest);
- prec -= len;
- while (--prec >= 0)
- outc('0', dest);
- while (*p)
- outc(*p++, dest);
- while (--pad >= 0)
- outc(' ', dest);
- break;
- case 's':
- p = va_arg(ap, char *);
- pad = 0;
- if (width) {
- len = strlen(p);
- if (prec >= 0 && len > prec)
- len = prec;
- pad = width - len;
- if (flushleft == 0) {
- while (--pad >= 0)
- outc(' ', dest);
- }
- }
- prec++;
- while (--prec != 0 && *p)
- outc(*p++, dest);
- while (--pad >= 0)
- outc(' ', dest);
- break;
- case 'c':
- c = va_arg(ap, int);
- outc(c, dest);
- break;
- default:
- outc(*f, dest);
- break;
- }
- f++;
+ optionarg = p;
+ p = NULL;
}
-#endif /* !HAVE_VASPRINTF */
+ optptr = p;
+ return c;
+}
+
+static void
+flushall() {
+ INTOFF;
+ fflush(stdout);
+ INTON;
}
-#endif
+static void
+out2fmt(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+}
/*
* Version of write which resumes after a signal is caught.
*/
static int
-xwrite(fd, buf, nbytes)
- int fd;
- const char *buf;
- int nbytes;
- {
+xwrite(int fd, const char *buf, int nbytes)
+{
int ntry;
int i;
int n;
}
-#ifdef notdef
-/*
- * Version of ioctl that retries after a signal is caught.
- * XXX unused function
- */
-
-static int
-xioctl(fd, request, arg)
- int fd;
- unsigned long request;
- char * arg;
-{
- int i;
-
- while ((i = ioctl(fd, request, arg)) == -1 && errno == EINTR);
- return i;
-}
-#endif
-
-
-#ifdef USE_GLIBC_STDIO
-static void initstreams() {
- output.stream = stdout;
- errout.stream = stderr;
-}
-
-
-static void
-openmemout() {
- INTOFF;
- memout.stream = open_memstream(&memout.buf, &memout.bufsize);
- INTON;
-}
-
-
-static int
-__closememout() {
- int error;
- error = fclose(memout.stream);
- memout.stream = NULL;
- return error;
-}
-#endif
-/* $NetBSD: parser.c,v 1.46 2001/02/04 19:52:06 christos Exp $ */
-
/*
* Shell command parser.
*/
struct heredoc {
- struct heredoc *next; /* next here document in list */
- union node *here; /* redirection node */
- char *eofmark; /* string indicating end of input */
- int striptabs; /* if set, strip leading tabs */
+ struct heredoc *next; /* next here document in list */
+ union node *here; /* redirection node */
+ char *eofmark; /* string indicating end of input */
+ int striptabs; /* if set, strip leading tabs */
};
+static struct heredoc *heredoclist; /* list of here documents to read */
+static int parsebackquote; /* nonzero if we are inside backquotes */
+static int doprompt; /* if set, prompt the user */
+static int needprompt; /* true if interactive and at start of line */
+static int lasttoken; /* last token read */
+static char *wordtext; /* text of last word returned by readtoken */
-struct heredoc *heredoclist; /* list of here documents to read */
-static int parsebackquote; /* nonzero if we are inside backquotes */
-static int doprompt; /* if set, prompt the user */
-static int needprompt; /* true if interactive and at start of line */
-static int lasttoken; /* last token read */
-static int tokpushback; /* last token pushed back */
-static char *wordtext; /* text of last word returned by readtoken */
-static int checkkwd; /* 1 == check for kwds, 2 == also eat newlines */
-/* 1 == check for aliases, 2 == also check for assignments */
-static int checkalias;
-struct nodelist *backquotelist;
-union node *redirnode;
-struct heredoc *heredoc;
-static int quoteflag; /* set if (part of) last token was quoted */
-static int startlinno; /* line # where last token started */
-
-
-static union node *list __P((int));
-static union node *andor __P((void));
-static union node *pipeline __P((void));
-static union node *command __P((void));
-static union node *simplecmd __P((void));
-static union node *makename __P((void));
-static void parsefname __P((void));
-static void parseheredoc __P((void));
-static int peektoken __P((void));
-static int readtoken __P((void));
-static int xxreadtoken __P((void));
-static int readtoken1 __P((int, char const *, char *, int));
-static int noexpand __P((char *));
-static void synexpect __P((int)) __attribute__((noreturn));
-static void synerror __P((const char *)) __attribute__((noreturn));
-static void setprompt __P((int));
+static struct nodelist *backquotelist;
+static union node *redirnode;
+static struct heredoc *heredoc;
+static int quoteflag; /* set if (part of) last token was quoted */
+static int startlinno; /* line # where last token started */
+
+
+static union node *list (int);
+static union node *andor (void);
+static union node *pipeline (void);
+static union node *command (void);
+static union node *simplecmd (void);
+static void parsefname (void);
+static void parseheredoc (void);
+static char peektoken (void);
+static int readtoken (void);
+static int xxreadtoken (void);
+static int readtoken1 (int, int, const char *, int);
+static int noexpand (char *);
+static void synexpect (int) __attribute__((noreturn));
+static void synerror (const char *) __attribute__((noreturn));
+static void setprompt (int);
/*
* valid parse tree indicating a blank line.)
*/
-union node *
+static union node *
parsecmd(int interact)
{
int t;
int tok;
checkkwd = 2;
- if (nlflag == 0 && tokendlist[peektoken()])
+ if (nlflag == 0 && peektoken())
return NULL;
n1 = NULL;
for (;;) {
tokpushback++;
}
checkkwd = 2;
- if (tokendlist[peektoken()])
+ if (peektoken())
return n1;
break;
case TEOF:
if (heredoclist)
parseheredoc();
else
- pungetc(); /* push back EOF on input */
+ pungetc(); /* push back EOF on input */
return n1;
default:
if (nlflag)
n1 = NULL;
rpp = &redir;
+ /* Check for redirection which may precede command */
+ while (readtoken() == TREDIR) {
+ *rpp = n2 = redirnode;
+ rpp = &n2->nfile.next;
+ parsefname();
+ }
+ tokpushback++;
+
switch (readtoken()) {
case TIF:
n1 = (union node *)stalloc(sizeof (struct nif));
n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL;
n1->nbinary.ch1 = list(0);
if ((got=readtoken()) != TDO) {
-TRACE(("expecting DO got %s %s\n", tokname[got], got == TWORD ? wordtext : ""));
+TRACE(("expecting DO got %s %s\n", tokname(got), got == TWORD ? wordtext : ""));
synexpect(TDO);
}
n1->nbinary.ch2 = list(0);
if (!redir)
synexpect(-1);
case TWORD:
- case TREDIR:
tokpushback++;
n1 = simplecmd();
return n1;
case TREDIR:
*rpp = n = redirnode;
rpp = &n->nfile.next;
- parsefname(); /* read name of redirection file */
+ parsefname(); /* read name of redirection file */
break;
case TLP:
if (
/* We have a function */
if (readtoken() != TRP)
synexpect(TRP);
-#ifdef notdef
- if (! goodname(n->narg.text))
- synerror("Bad function name");
-#endif
n->type = NDEFUN;
checkkwd = 2;
n->narg.next = command();
}
static union node *
-makename() {
+makename(void) {
union node *n;
n = (union node *)stalloc(sizeof (struct narg));
}
static void fixredir(union node *n, const char *text, int err)
- {
+{
TRACE(("Fix redir %s %d\n", text, err));
if (!err)
n->ndup.vname = NULL;
static void
-parsefname() {
+parsefname(void) {
union node *n = redirnode;
if (readtoken() != TWORD)
while (*wordtext == '\t')
wordtext++;
}
- if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN)
- synerror("Illegal eof marker for << redirection");
- rmescapes(wordtext);
- here->eofmark = wordtext;
- here->next = NULL;
- if (heredoclist == NULL)
- heredoclist = here;
- else {
- for (p = heredoclist ; p->next ; p = p->next);
- p->next = here;
- }
- } else if (n->type == NTOFD || n->type == NFROMFD) {
- fixredir(n, wordtext, 0);
- } else {
- n->nfile.fname = makename();
- }
-}
-
-
-/*
- * Input any here documents.
- */
-
-static void
-parseheredoc() {
- struct heredoc *here;
- union node *n;
-
- while (heredoclist) {
- here = heredoclist;
- heredoclist = here->next;
- if (needprompt) {
- setprompt(2);
- needprompt = 0;
- }
- readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX,
- here->eofmark, here->striptabs);
- n = (union node *)stalloc(sizeof (struct narg));
- n->narg.type = NARG;
- n->narg.next = NULL;
- n->narg.text = wordtext;
- n->narg.backquote = backquotelist;
- here->here->nhere.doc = n;
- }
-}
-
-static int
-peektoken() {
- int t;
-
- t = readtoken();
- tokpushback++;
- return (t);
-}
-
-static int
-readtoken() {
- int t;
- int savecheckkwd = checkkwd;
- int savecheckalias = checkalias;
- struct alias *ap;
-#ifdef DEBUG
- int alreadyseen = tokpushback;
-#endif
-
-top:
- t = xxreadtoken();
- checkalias = savecheckalias;
-
- if (checkkwd) {
- /*
- * eat newlines
- */
- if (checkkwd == 2) {
- checkkwd = 0;
- while (t == TNL) {
- parseheredoc();
- t = xxreadtoken();
- }
- }
- checkkwd = 0;
- /*
- * check for keywords
- */
- if (t == TWORD && !quoteflag)
- {
- const char *const *pp;
-
- if ((pp = findkwd(wordtext))) {
- lasttoken = t = pp - parsekwd + KWDOFFSET;
- TRACE(("keyword %s recognized\n", tokname[t]));
- goto out;
- }
- }
- }
-
- if (t != TWORD) {
- if (t != TREDIR) {
- checkalias = 0;
- }
- } else if (checkalias == 2 && isassignment(wordtext)) {
- lasttoken = t = TASSIGN;
- } else if (checkalias) {
- if (!quoteflag && (ap = lookupalias(wordtext, 1)) != NULL) {
- if (*ap->val) {
- pushstring(ap->val, strlen(ap->val), ap);
- }
- checkkwd = savecheckkwd;
- goto top;
- }
- checkalias = 0;
- }
-out:
-#ifdef DEBUG
- if (!alreadyseen)
- TRACE(("token %s %s\n", tokname[t], t == TWORD || t == TASSIGN ? wordtext : ""));
- else
- TRACE(("reread token %s %s\n", tokname[t], t == TWORD || t == TASSIGN ? wordtext : ""));
-#endif
- return (t);
-}
-
-
-/*
- * Read the next input token.
- * If the token is a word, we set backquotelist to the list of cmds in
- * backquotes. We set quoteflag to true if any part of the word was
- * quoted.
- * If the token is TREDIR, then we set redirnode to a structure containing
- * the redirection.
- * In all cases, the variable startlinno is set to the number of the line
- * on which the token starts.
- *
- * [Change comment: here documents and internal procedures]
- * [Readtoken shouldn't have any arguments. Perhaps we should make the
- * word parsing code into a separate routine. In this case, readtoken
- * doesn't need to have any internal procedures, but parseword does.
- * We could also make parseoperator in essence the main routine, and
- * have parseword (readtoken1?) handle both words and redirection.]
- */
-
-#define RETURN(token) return lasttoken = token
-
-static int
-xxreadtoken() {
- int c;
-
- if (tokpushback) {
- tokpushback = 0;
- return lasttoken;
- }
- if (needprompt) {
- setprompt(2);
- needprompt = 0;
- }
- startlinno = plinno;
- for (;;) { /* until token or start of word found */
- c = pgetc_macro();
- switch (c) {
- case ' ': case '\t':
- case PEOA:
- continue;
- case '#':
- while ((c = pgetc()) != '\n' && c != PEOF);
- pungetc();
- continue;
- case '\\':
- if (pgetc() == '\n') {
- startlinno = ++plinno;
- if (doprompt)
- setprompt(2);
- else
- setprompt(0);
- continue;
- }
- pungetc();
- goto breakloop;
- case '\n':
- plinno++;
- needprompt = doprompt;
- RETURN(TNL);
- case PEOF:
- RETURN(TEOF);
- case '&':
- if (pgetc() == '&')
- RETURN(TAND);
- pungetc();
- RETURN(TBACKGND);
- case '|':
- if (pgetc() == '|')
- RETURN(TOR);
- pungetc();
- RETURN(TPIPE);
- case ';':
- if (pgetc() == ';')
- RETURN(TENDCASE);
- pungetc();
- RETURN(TSEMI);
- case '(':
- RETURN(TLP);
- case ')':
- RETURN(TRP);
- default:
- goto breakloop;
- }
+ if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN)
+ synerror("Illegal eof marker for << redirection");
+ rmescapes(wordtext);
+ here->eofmark = wordtext;
+ here->next = NULL;
+ if (heredoclist == NULL)
+ heredoclist = here;
+ else {
+ for (p = heredoclist ; p->next ; p = p->next);
+ p->next = here;
+ }
+ } else if (n->type == NTOFD || n->type == NFROMFD) {
+ fixredir(n, wordtext, 0);
+ } else {
+ n->nfile.fname = makename();
}
-breakloop:
- return readtoken1(c, BASESYNTAX, (char *)NULL, 0);
-#undef RETURN
}
-
/*
- * If eofmark is NULL, read a word or a redirection symbol. If eofmark
- * is not NULL, read a here document. In the latter case, eofmark is the
- * word which marks the end of the document and striptabs is true if
- * leading tabs should be stripped from the document. The argument firstc
- * is the first character of the input token or document.
- *
- * Because C does not have internal subroutines, I have simulated them
- * using goto's to implement the subroutine linkage. The following macros
- * will run code that appears at the end of readtoken1.
+ * Input any here documents.
*/
-#define CHECKEND() {goto checkend; checkend_return:;}
-#define PARSEREDIR() {goto parseredir; parseredir_return:;}
-#define PARSESUB() {goto parsesub; parsesub_return:;}
-#define PARSEBACKQOLD() {oldstyle = 1; goto parsebackq; parsebackq_oldreturn:;}
-#define PARSEBACKQNEW() {oldstyle = 0; goto parsebackq; parsebackq_newreturn:;}
-#define PARSEARITH() {goto parsearith; parsearith_return:;}
+static void
+parseheredoc() {
+ struct heredoc *here;
+ union node *n;
+
+ while (heredoclist) {
+ here = heredoclist;
+ heredoclist = here->next;
+ if (needprompt) {
+ setprompt(2);
+ needprompt = 0;
+ }
+ readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX,
+ here->eofmark, here->striptabs);
+ n = (union node *)stalloc(sizeof (struct narg));
+ n->narg.type = NARG;
+ n->narg.next = NULL;
+ n->narg.text = wordtext;
+ n->narg.backquote = backquotelist;
+ here->here->nhere.doc = n;
+ }
+}
+
+static char
+peektoken() {
+ int t;
+
+ t = readtoken();
+ tokpushback++;
+ return tokname_array[t][0];
+}
static int
-readtoken1(firstc, syntax, eofmark, striptabs)
- int firstc;
- char const *syntax;
- char *eofmark;
- int striptabs;
- {
- int c = firstc;
- char *out;
- int len;
- char line[EOFMARKLEN + 1];
- struct nodelist *bqlist;
- int quotef;
- int dblquote;
- int varnest; /* levels of variables expansion */
- int arinest; /* levels of arithmetic expansion */
- int parenlevel; /* levels of parens in arithmetic */
- int dqvarnest; /* levels of variables expansion within double quotes */
- int oldstyle;
- char const *prevsyntax; /* syntax before arithmetic */
-#if __GNUC__
- /* Avoid longjmp clobbering */
- (void) &out;
- (void) "ef;
- (void) &dblquote;
- (void) &varnest;
- (void) &arinest;
- (void) &parenlevel;
- (void) &dqvarnest;
- (void) &oldstyle;
- (void) &prevsyntax;
- (void) &syntax;
+readtoken() {
+ int t;
+
+#ifdef ASH_ALIAS
+ int savecheckalias = checkalias;
+ int savecheckkwd = checkkwd;
+ struct alias *ap;
#endif
- startlinno = plinno;
- dblquote = 0;
- if (syntax == DQSYNTAX)
- dblquote = 1;
- quotef = 0;
- bqlist = NULL;
- varnest = 0;
- arinest = 0;
- parenlevel = 0;
- dqvarnest = 0;
+#ifdef DEBUG
+ int alreadyseen = tokpushback;
+#endif
- STARTSTACKSTR(out);
- loop: { /* for each line, until end of word */
-#if ATTY
- if (c == '\034' && doprompt
- && attyset() && ! equal(termval(), "emacs")) {
- attyline();
- if (syntax == BASESYNTAX)
- return readtoken();
- c = pgetc();
- goto loop;
- }
+#ifdef ASH_ALIAS
+top:
#endif
- CHECKEND(); /* set c to PEOF if at end of here document */
- for (;;) { /* until end of line or end of word */
- CHECKSTRSPACE(3, out); /* permit 3 calls to USTPUTC */
- switch(syntax[c]) {
- case CNL: /* '\n' */
- if (syntax == BASESYNTAX)
- goto endword; /* exit outer loop */
- USTPUTC(c, out);
- plinno++;
- if (doprompt)
- setprompt(2);
- else
- setprompt(0);
- c = pgetc();
- goto loop; /* continue outer loop */
- case CWORD:
- USTPUTC(c, out);
- break;
- case CCTL:
- if ((eofmark == NULL || dblquote) &&
- dqvarnest == 0)
- USTPUTC(CTLESC, out);
- USTPUTC(c, out);
- break;
- case CBACK: /* backslash */
- c = pgetc2();
- if (c == PEOF) {
- USTPUTC('\\', out);
- pungetc();
- } else if (c == '\n') {
- if (doprompt)
- setprompt(2);
- else
- setprompt(0);
- } else {
- if (dblquote && c != '\\' && c != '`' && c != '$'
- && (c != '"' || eofmark != NULL))
- USTPUTC('\\', out);
- if (SQSYNTAX[c] == CCTL)
- USTPUTC(CTLESC, out);
- else if (eofmark == NULL)
- USTPUTC(CTLQUOTEMARK, out);
- USTPUTC(c, out);
- quotef++;
- }
- break;
- case CSQUOTE:
- if (eofmark == NULL)
- USTPUTC(CTLQUOTEMARK, out);
- syntax = SQSYNTAX;
- break;
- case CDQUOTE:
- if (eofmark == NULL)
- USTPUTC(CTLQUOTEMARK, out);
- syntax = DQSYNTAX;
- dblquote = 1;
- break;
- case CENDQUOTE:
- if (eofmark != NULL && arinest == 0 &&
- varnest == 0) {
- USTPUTC(c, out);
- } else {
- if (arinest) {
- syntax = ARISYNTAX;
- dblquote = 0;
- } else if (eofmark == NULL &&
- dqvarnest == 0) {
- syntax = BASESYNTAX;
- dblquote = 0;
- }
- quotef++;
- }
- break;
- case CVAR: /* '$' */
- PARSESUB(); /* parse substitution */
- break;
- case CENDVAR: /* '}' */
- if (varnest > 0) {
- varnest--;
- if (dqvarnest > 0) {
- dqvarnest--;
- }
- USTPUTC(CTLENDVAR, out);
- } else {
- USTPUTC(c, out);
- }
- break;
-#ifdef ASH_MATH_SUPPORT
- case CLP: /* '(' in arithmetic */
- parenlevel++;
- USTPUTC(c, out);
- break;
- case CRP: /* ')' in arithmetic */
- if (parenlevel > 0) {
- USTPUTC(c, out);
- --parenlevel;
- } else {
- if (pgetc() == ')') {
- if (--arinest == 0) {
- USTPUTC(CTLENDARI, out);
- syntax = prevsyntax;
- if (syntax == DQSYNTAX)
- dblquote = 1;
- else
- dblquote = 0;
- } else
- USTPUTC(')', out);
- } else {
- /*
- * unbalanced parens
- * (don't 2nd guess - no error)
- */
- pungetc();
- USTPUTC(')', out);
- }
- }
- break;
+
+ t = xxreadtoken();
+
+#ifdef ASH_ALIAS
+ checkalias = savecheckalias;
#endif
- case CBQUOTE: /* '`' */
- PARSEBACKQOLD();
- break;
- case CEOF:
- goto endword; /* exit outer loop */
- case CIGN:
- break;
- default:
- if (varnest == 0)
- goto endword; /* exit outer loop */
- if (c != PEOA) {
- USTPUTC(c, out);
- }
+
+ if (checkkwd) {
+ /*
+ * eat newlines
+ */
+ if (checkkwd == 2) {
+ checkkwd = 0;
+ while (t == TNL) {
+ parseheredoc();
+ t = xxreadtoken();
}
- c = pgetc_macro();
}
- }
-endword:
- if (syntax == ARISYNTAX)
- synerror("Missing '))'");
- if (syntax != BASESYNTAX && ! parsebackquote && eofmark == NULL)
- synerror("Unterminated quoted string");
- if (varnest != 0) {
- startlinno = plinno;
- synerror("Missing '}'");
- }
- USTPUTC('\0', out);
- len = out - stackblock();
- out = stackblock();
- if (eofmark == NULL) {
- if ((c == '>' || c == '<')
- && quotef == 0
- && len <= 2
- && (*out == '\0' || is_digit(*out))) {
- PARSEREDIR();
- return lasttoken = TREDIR;
- } else {
- pungetc();
+ checkkwd = 0;
+ /*
+ * check for keywords
+ */
+ if (t == TWORD && !quoteflag)
+ {
+ const char *const *pp;
+
+ if ((pp = findkwd(wordtext))) {
+ lasttoken = t = pp - tokname_array;
+ TRACE(("keyword %s recognized\n", tokname(t)));
+ goto out;
+ }
}
}
- quoteflag = quotef;
- backquotelist = bqlist;
- grabstackblock(len);
- wordtext = out;
- return lasttoken = TWORD;
-/* end of readtoken routine */
-
-/*
- * Check to see whether we are at the end of the here document. When this
- * is called, c is set to the first character of the next input line. If
- * we are at the end of the here document, this routine sets the c to PEOF.
- */
-
-checkend: {
- if (eofmark) {
- if (c == PEOA) {
- c = pgetc2();
- }
- if (striptabs) {
- while (c == '\t') {
- c = pgetc2();
- }
+ if (t != TWORD) {
+ if (t != TREDIR) {
+ checkalias = 0;
}
- if (c == *eofmark) {
- if (pfgets(line, sizeof line) != NULL) {
- char *p, *q;
-
- p = line;
- for (q = eofmark + 1 ; *q && *p == *q ; p++, q++);
- if (*p == '\n' && *q == '\0') {
- c = PEOF;
- plinno++;
- needprompt = doprompt;
- } else {
- pushstring(line, strlen(line), NULL);
- }
+ } else if (checkalias == 2 && isassignment(wordtext)) {
+ lasttoken = t = TASSIGN;
+#ifdef ASH_ALIAS
+ } else if (checkalias) {
+ if (!quoteflag && (ap = lookupalias(wordtext, 1)) != NULL) {
+ if (*ap->val) {
+ pushstring(ap->val, strlen(ap->val), ap);
}
+ checkkwd = savecheckkwd;
+ goto top;
}
+ checkalias = 0;
+#endif
}
- goto checkend_return;
+out:
+#ifdef DEBUG
+ if (!alreadyseen)
+ TRACE(("token %s %s\n", tokname(t), t == TWORD || t == TASSIGN ? wordtext : ""));
+ else
+ TRACE(("reread token %s %s\n", tokname(t), t == TWORD || t == TASSIGN ? wordtext : ""));
+#endif
+ return (t);
}
/*
- * Parse a redirection operator. The variable "out" points to a string
- * specifying the fd to be redirected. The variable "c" contains the
- * first character of the redirection operator.
+ * Read the next input token.
+ * If the token is a word, we set backquotelist to the list of cmds in
+ * backquotes. We set quoteflag to true if any part of the word was
+ * quoted.
+ * If the token is TREDIR, then we set redirnode to a structure containing
+ * the redirection.
+ * In all cases, the variable startlinno is set to the number of the line
+ * on which the token starts.
+ *
+ * [Change comment: here documents and internal procedures]
+ * [Readtoken shouldn't have any arguments. Perhaps we should make the
+ * word parsing code into a separate routine. In this case, readtoken
+ * doesn't need to have any internal procedures, but parseword does.
+ * We could also make parseoperator in essence the main routine, and
+ * have parseword (readtoken1?) handle both words and redirection.]
*/
-parseredir: {
- char fd = *out;
- union node *np;
+#define NEW_xxreadtoken
+#ifdef NEW_xxreadtoken
- np = (union node *)stalloc(sizeof (struct nfile));
- if (c == '>') {
- np->nfile.fd = 1;
- c = pgetc();
- if (c == '>')
- np->type = NAPPEND;
- else if (c == '&')
- np->type = NTOFD;
- else if (c == '|')
- np->type = NTOOV;
- else {
- np->type = NTO;
- pungetc();
- }
- } else { /* c == '<' */
- np->nfile.fd = 0;
- switch (c = pgetc()) {
- case '<':
- if (sizeof (struct nfile) != sizeof (struct nhere)) {
- np = (union node *)stalloc(sizeof (struct nhere));
- np->nfile.fd = 0;
- }
- np->type = NHERE;
- heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc));
- heredoc->here = np;
- if ((c = pgetc()) == '-') {
- heredoc->striptabs = 1;
- } else {
- heredoc->striptabs = 0;
+static const char xxreadtoken_chars[] = "\n()&|;"; /* singles must be first! */
+static const char xxreadtoken_tokens[] = {
+ TNL, TLP, TRP, /* only single occurrence allowed */
+ TBACKGND, TPIPE, TSEMI, /* if single occurrence */
+ TEOF, /* corresponds to trailing nul */
+ TAND, TOR, TENDCASE, /* if double occurrence */
+};
+
+#define xxreadtoken_doubles \
+ (sizeof(xxreadtoken_tokens) - sizeof(xxreadtoken_chars))
+#define xxreadtoken_singles \
+ (sizeof(xxreadtoken_chars) - xxreadtoken_doubles - 1)
+
+static int
+xxreadtoken() {
+ int c;
+
+ if (tokpushback) {
+ tokpushback = 0;
+ return lasttoken;
+ }
+ if (needprompt) {
+ setprompt(2);
+ needprompt = 0;
+ }
+ startlinno = plinno;
+ for (;;) { /* until token or start of word found */
+ c = pgetc_macro();
+
+ if ((c!=' ') && (c!='\t')
+#ifdef ASH_ALIAS
+ && (c!=PEOA)
+#endif
+ ) {
+ if (c=='#') {
+ while ((c = pgetc()) != '\n' && c != PEOF);
pungetc();
- }
- break;
+ } else if (c=='\\') {
+ if (pgetc() != '\n') {
+ pungetc();
+ goto READTOKEN1;
+ }
+ startlinno = ++plinno;
+ setprompt(doprompt ? 2 : 0);
+ } else {
+ const char *p
+ = xxreadtoken_chars + sizeof(xxreadtoken_chars) - 1;
- case '&':
- np->type = NFROMFD;
- break;
+ if (c!=PEOF) {
+ if (c=='\n') {
+ plinno++;
+ needprompt = doprompt;
+ }
- case '>':
- np->type = NFROMTO;
- break;
+ p = strchr(xxreadtoken_chars, c);
+ if (p == NULL) {
+ READTOKEN1:
+ return readtoken1(c, BASESYNTAX, (char *)NULL, 0);
+ }
+
+ if (p-xxreadtoken_chars >= xxreadtoken_singles) {
+ if (pgetc() == *p) { /* double occurrence? */
+ p += xxreadtoken_doubles + 1;
+ } else {
+ pungetc();
+ }
+ }
+ }
- default:
- np->type = NFROM;
- pungetc();
- break;
+ return lasttoken = xxreadtoken_tokens[p-xxreadtoken_chars];
+ }
}
}
- if (fd != '\0')
- np->nfile.fd = digit_val(fd);
- redirnode = np;
- goto parseredir_return;
}
-/*
- * Parse a substitution. At this point, we have read the dollar sign
- * and nothing else.
- */
+#else
+#define RETURN(token) return lasttoken = token
-parsesub: {
- int subtype;
- int typeloc;
- int flags;
- char *p;
- static const char types[] = "}-+?=";
+static int
+xxreadtoken() {
+ int c;
- c = pgetc();
- if (
- c <= PEOA ||
- (c != '(' && c != '{' && !is_name(c) && !is_special(c))
- ) {
- USTPUTC('$', out);
- pungetc();
- } else if (c == '(') { /* $(command) or $((arith)) */
- if (pgetc() == '(') {
- PARSEARITH();
- } else {
+ if (tokpushback) {
+ tokpushback = 0;
+ return lasttoken;
+ }
+ if (needprompt) {
+ setprompt(2);
+ needprompt = 0;
+ }
+ startlinno = plinno;
+ for (;;) { /* until token or start of word found */
+ c = pgetc_macro();
+ switch (c) {
+ case ' ': case '\t':
+#ifdef ASH_ALIAS
+ case PEOA:
+#endif
+ continue;
+ case '#':
+ while ((c = pgetc()) != '\n' && c != PEOF);
pungetc();
- PARSEBACKQNEW();
- }
- } else {
- USTPUTC(CTLVAR, out);
- typeloc = out - stackblock();
- USTPUTC(VSNORMAL, out);
- subtype = VSNORMAL;
- if (c == '{') {
- c = pgetc();
- if (c == '#') {
- if ((c = pgetc()) == '}')
- c = '#';
- else
- subtype = VSLENGTH;
- }
- else
- subtype = 0;
- }
- if (c > PEOA && is_name(c)) {
- do {
- STPUTC(c, out);
- c = pgetc();
- } while (c > PEOA && is_in_name(c));
- } else if (is_digit(c)) {
- do {
- USTPUTC(c, out);
- c = pgetc();
- } while (is_digit(c));
- }
- else if (is_special(c)) {
- USTPUTC(c, out);
- c = pgetc();
- }
- else
-badsub: synerror("Bad substitution");
-
- STPUTC('=', out);
- flags = 0;
- if (subtype == 0) {
- switch (c) {
- case ':':
- flags = VSNUL;
- c = pgetc();
- /*FALLTHROUGH*/
- default:
- p = strchr(types, c);
- if (p == NULL)
- goto badsub;
- subtype = p - types + VSNORMAL;
- break;
- case '%':
- case '#':
- {
- int cc = c;
- subtype = c == '#' ? VSTRIMLEFT :
- VSTRIMRIGHT;
- c = pgetc();
- if (c == cc)
- subtype++;
- else
- pungetc();
- break;
- }
+ continue;
+ case '\\':
+ if (pgetc() == '\n') {
+ startlinno = ++plinno;
+ if (doprompt)
+ setprompt(2);
+ else
+ setprompt(0);
+ continue;
}
- } else {
pungetc();
- }
- if (dblquote || arinest)
- flags |= VSQUOTE;
- *(stackblock() + typeloc) = subtype | flags;
- if (subtype != VSNORMAL) {
- varnest++;
- if (dblquote) {
- dqvarnest++;
- }
+ goto breakloop;
+ case '\n':
+ plinno++;
+ needprompt = doprompt;
+ RETURN(TNL);
+ case PEOF:
+ RETURN(TEOF);
+ case '&':
+ if (pgetc() == '&')
+ RETURN(TAND);
+ pungetc();
+ RETURN(TBACKGND);
+ case '|':
+ if (pgetc() == '|')
+ RETURN(TOR);
+ pungetc();
+ RETURN(TPIPE);
+ case ';':
+ if (pgetc() == ';')
+ RETURN(TENDCASE);
+ pungetc();
+ RETURN(TSEMI);
+ case '(':
+ RETURN(TLP);
+ case ')':
+ RETURN(TRP);
+ default:
+ goto breakloop;
}
}
- goto parsesub_return;
+breakloop:
+ return readtoken1(c, BASESYNTAX, (char *)NULL, 0);
+#undef RETURN
}
+#endif
/*
- * Called to parse command substitutions. Newstyle is set if the command
- * is enclosed inside $(...); nlpp is a pointer to the head of the linked
- * list of commands (passed by reference), and savelen is the number of
- * characters on the top of the stack which must be preserved.
+ * If eofmark is NULL, read a word or a redirection symbol. If eofmark
+ * is not NULL, read a here document. In the latter case, eofmark is the
+ * word which marks the end of the document and striptabs is true if
+ * leading tabs should be stripped from the document. The argument firstc
+ * is the first character of the input token or document.
+ *
+ * Because C does not have internal subroutines, I have simulated them
+ * using goto's to implement the subroutine linkage. The following macros
+ * will run code that appears at the end of readtoken1.
*/
-parsebackq: {
- struct nodelist **nlpp;
- int savepbq;
- union node *n;
- char *volatile str;
- struct jmploc jmploc;
- struct jmploc *volatile savehandler;
- int savelen;
- int saveprompt;
-#ifdef __GNUC__
- (void) &saveprompt;
-#endif
-
- savepbq = parsebackquote;
- if (setjmp(jmploc.loc)) {
- if (str)
- ckfree(str);
- parsebackquote = 0;
- handler = savehandler;
- longjmp(handler->loc, 1);
- }
- INTOFF;
- str = NULL;
- savelen = out - stackblock();
- if (savelen > 0) {
- str = ckmalloc(savelen);
- memcpy(str, stackblock(), savelen);
- }
- savehandler = handler;
- handler = &jmploc;
- INTON;
- if (oldstyle) {
- /* We must read until the closing backquote, giving special
- treatment to some slashes, and then push the string and
- reread it as input, interpreting it normally. */
- char *pout;
- int pc;
- int psavelen;
- char *pstr;
+#define CHECKEND() {goto checkend; checkend_return:;}
+#define PARSEREDIR() {goto parseredir; parseredir_return:;}
+#define PARSESUB() {goto parsesub; parsesub_return:;}
+#define PARSEBACKQOLD() {oldstyle = 1; goto parsebackq; parsebackq_oldreturn:;}
+#define PARSEBACKQNEW() {oldstyle = 0; goto parsebackq; parsebackq_newreturn:;}
+#define PARSEARITH() {goto parsearith; parsearith_return:;}
+static int
+readtoken1(int firstc, int syntax, const char *eofmark, int striptabs)
+{
+ int c = firstc;
+ char *out;
+ int len;
+ char line[EOFMARKLEN + 1];
+ struct nodelist *bqlist;
+ int quotef;
+ int dblquote;
+ int varnest; /* levels of variables expansion */
+ int arinest; /* levels of arithmetic expansion */
+ int parenlevel; /* levels of parens in arithmetic */
+ int dqvarnest; /* levels of variables expansion within double quotes */
+ int oldstyle;
+ int prevsyntax; /* syntax before arithmetic */
+#if __GNUC__
+ /* Avoid longjmp clobbering */
+ (void) &out;
+ (void) "ef;
+ (void) &dblquote;
+ (void) &varnest;
+ (void) &arinest;
+ (void) &parenlevel;
+ (void) &dqvarnest;
+ (void) &oldstyle;
+ (void) &prevsyntax;
+ (void) &syntax;
+#endif
- STARTSTACKSTR(pout);
- for (;;) {
- if (needprompt) {
- setprompt(2);
- needprompt = 0;
- }
- switch (pc = pgetc()) {
- case '`':
- goto done;
+ startlinno = plinno;
+ dblquote = 0;
+ if (syntax == DQSYNTAX)
+ dblquote = 1;
+ quotef = 0;
+ bqlist = NULL;
+ varnest = 0;
+ arinest = 0;
+ parenlevel = 0;
+ dqvarnest = 0;
- case '\\':
- if ((pc = pgetc()) == '\n') {
- plinno++;
+ STARTSTACKSTR(out);
+ loop: { /* for each line, until end of word */
+ CHECKEND(); /* set c to PEOF if at end of here document */
+ for (;;) { /* until end of line or end of word */
+ CHECKSTRSPACE(3, out); /* permit 3 calls to USTPUTC */
+ switch(SIT(c,syntax)) {
+ case CNL: /* '\n' */
+ if (syntax == BASESYNTAX)
+ goto endword; /* exit outer loop */
+ USTPUTC(c, out);
+ plinno++;
+ if (doprompt)
+ setprompt(2);
+ else
+ setprompt(0);
+ c = pgetc();
+ goto loop; /* continue outer loop */
+ case CWORD:
+ USTPUTC(c, out);
+ break;
+ case CCTL:
+ if ((eofmark == NULL || dblquote) &&
+ dqvarnest == 0)
+ USTPUTC(CTLESC, out);
+ USTPUTC(c, out);
+ break;
+ case CBACK: /* backslash */
+ c = pgetc2();
+ if (c == PEOF) {
+ USTPUTC('\\', out);
+ pungetc();
+ } else if (c == '\n') {
if (doprompt)
setprompt(2);
else
setprompt(0);
- /*
- * If eating a newline, avoid putting
- * the newline into the new character
- * stream (via the STPUTC after the
- * switch).
- */
- continue;
+ } else {
+ if (dblquote && c != '\\' && c != '`' && c != '$'
+ && (c != '"' || eofmark != NULL))
+ USTPUTC('\\', out);
+ if (SIT(c,SQSYNTAX) == CCTL)
+ USTPUTC(CTLESC, out);
+ else if (eofmark == NULL)
+ USTPUTC(CTLQUOTEMARK, out);
+ USTPUTC(c, out);
+ quotef++;
}
- if (pc != '\\' && pc != '`' && pc != '$'
- && (!dblquote || pc != '"'))
- STPUTC('\\', pout);
- if (pc > PEOA) {
- break;
+ break;
+ case CSQUOTE:
+ if (eofmark == NULL)
+ USTPUTC(CTLQUOTEMARK, out);
+ syntax = SQSYNTAX;
+ break;
+ case CDQUOTE:
+ if (eofmark == NULL)
+ USTPUTC(CTLQUOTEMARK, out);
+ syntax = DQSYNTAX;
+ dblquote = 1;
+ break;
+ case CENDQUOTE:
+ if (eofmark != NULL && arinest == 0 &&
+ varnest == 0) {
+ USTPUTC(c, out);
+ } else {
+ if (arinest) {
+ syntax = ARISYNTAX;
+ dblquote = 0;
+ } else if (eofmark == NULL &&
+ dqvarnest == 0) {
+ syntax = BASESYNTAX;
+ dblquote = 0;
+ }
+ quotef++;
}
- /* fall through */
-
- case PEOF:
- case PEOA:
- startlinno = plinno;
- synerror("EOF in backquote substitution");
-
- case '\n':
- plinno++;
- needprompt = doprompt;
break;
-
+ case CVAR: /* '$' */
+ PARSESUB(); /* parse substitution */
+ break;
+ case CENDVAR: /* '}' */
+ if (varnest > 0) {
+ varnest--;
+ if (dqvarnest > 0) {
+ dqvarnest--;
+ }
+ USTPUTC(CTLENDVAR, out);
+ } else {
+ USTPUTC(c, out);
+ }
+ break;
+#ifdef ASH_MATH_SUPPORT
+ case CLP: /* '(' in arithmetic */
+ parenlevel++;
+ USTPUTC(c, out);
+ break;
+ case CRP: /* ')' in arithmetic */
+ if (parenlevel > 0) {
+ USTPUTC(c, out);
+ --parenlevel;
+ } else {
+ if (pgetc() == ')') {
+ if (--arinest == 0) {
+ USTPUTC(CTLENDARI, out);
+ syntax = prevsyntax;
+ if (syntax == DQSYNTAX)
+ dblquote = 1;
+ else
+ dblquote = 0;
+ } else
+ USTPUTC(')', out);
+ } else {
+ /*
+ * unbalanced parens
+ * (don't 2nd guess - no error)
+ */
+ pungetc();
+ USTPUTC(')', out);
+ }
+ }
+ break;
+#endif
+ case CBQUOTE: /* '`' */
+ PARSEBACKQOLD();
+ break;
+ case CENDFILE:
+ goto endword; /* exit outer loop */
+ case CIGN:
+ break;
default:
- break;
- }
- STPUTC(pc, pout);
- }
-done:
- STPUTC('\0', pout);
- psavelen = pout - stackblock();
- if (psavelen > 0) {
- pstr = grabstackstr(pout);
- setinputstring(pstr);
- }
- }
- nlpp = &bqlist;
- while (*nlpp)
- nlpp = &(*nlpp)->next;
- *nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist));
- (*nlpp)->next = NULL;
- parsebackquote = oldstyle;
-
- if (oldstyle) {
- saveprompt = doprompt;
- doprompt = 0;
- }
-
- n = list(0);
-
- if (oldstyle)
- doprompt = saveprompt;
- else {
- if (readtoken() != TRP)
- synexpect(TRP);
- }
+ if (varnest == 0)
+ goto endword; /* exit outer loop */
+#ifdef ASH_ALIAS
+ if (c != PEOA)
+#endif
+ USTPUTC(c, out);
- (*nlpp)->n = n;
- if (oldstyle) {
- /*
- * Start reading from old file again, ignoring any pushed back
- * tokens left from the backquote parsing
- */
- popfile();
- tokpushback = 0;
+ }
+ c = pgetc_macro();
+ }
}
- while (stackblocksize() <= savelen)
- growstackblock();
- STARTSTACKSTR(out);
- if (str) {
- memcpy(out, str, savelen);
- STADJUST(savelen, out);
- INTOFF;
- ckfree(str);
- str = NULL;
- INTON;
+endword:
+ if (syntax == ARISYNTAX)
+ synerror("Missing '))'");
+ if (syntax != BASESYNTAX && ! parsebackquote && eofmark == NULL)
+ synerror("Unterminated quoted string");
+ if (varnest != 0) {
+ startlinno = plinno;
+ synerror("Missing '}'");
}
- parsebackquote = savepbq;
- handler = savehandler;
- if (arinest || dblquote)
- USTPUTC(CTLBACKQ | CTLQUOTE, out);
- else
- USTPUTC(CTLBACKQ, out);
- if (oldstyle)
- goto parsebackq_oldreturn;
- else
- goto parsebackq_newreturn;
-}
-
-/*
- * Parse an arithmetic expansion (indicate start of one and set state)
- */
-parsearith: {
-
- if (++arinest == 1) {
- prevsyntax = syntax;
- syntax = ARISYNTAX;
- USTPUTC(CTLARI, out);
- if (dblquote)
- USTPUTC('"',out);
- else
- USTPUTC(' ',out);
- } else {
- /*
- * we collapse embedded arithmetic expansion to
- * parenthesis, which should be equivalent
- */
- USTPUTC('(', out);
+ USTPUTC('\0', out);
+ len = out - stackblock();
+ out = stackblock();
+ if (eofmark == NULL) {
+ if ((c == '>' || c == '<')
+ && quotef == 0
+ && len <= 2
+ && (*out == '\0' || is_digit(*out))) {
+ PARSEREDIR();
+ return lasttoken = TREDIR;
+ } else {
+ pungetc();
+ }
}
- goto parsearith_return;
-}
-
-} /* end of readtoken */
-
-
-
-#ifdef mkinit
-INCLUDE "parser.h"
-RESET {
- tokpushback = 0;
- checkkwd = 0;
- checkalias = 0;
-}
-#endif
-
-/*
- * Returns true if the text contains nothing to expand (no dollar signs
- * or backquotes).
- */
-
-static int
-noexpand(text)
- char *text;
- {
- char *p;
- char c;
+ quoteflag = quotef;
+ backquotelist = bqlist;
+ grabstackblock(len);
+ wordtext = out;
+ return lasttoken = TWORD;
+/* end of readtoken routine */
- p = text;
- while ((c = *p++) != '\0') {
- if (c == CTLQUOTEMARK)
- continue;
- if (c == CTLESC)
- p++;
- else if (BASESYNTAX[(int)c] == CCTL)
- return 0;
- }
- return 1;
-}
/*
- * Return true if the argument is a legal variable name (a letter or
- * underscore followed by zero or more letters, underscores, and digits).
+ * Check to see whether we are at the end of the here document. When this
+ * is called, c is set to the first character of the next input line. If
+ * we are at the end of the here document, this routine sets the c to PEOF.
*/
-static int
-goodname(char *name)
- {
- char *p;
+checkend: {
+ if (eofmark) {
+#ifdef ASH_ALIAS
+ if (c == PEOA) {
+ c = pgetc2();
+ }
+#endif
+ if (striptabs) {
+ while (c == '\t') {
+ c = pgetc2();
+ }
+ }
+ if (c == *eofmark) {
+ if (pfgets(line, sizeof line) != NULL) {
+ const char *p, *q;
- p = name;
- if (! is_name(*p))
- return 0;
- while (*++p) {
- if (! is_in_name(*p))
- return 0;
+ p = line;
+ for (q = eofmark + 1 ; *q && *p == *q ; p++, q++);
+ if (*p == '\n' && *q == '\0') {
+ c = PEOF;
+ plinno++;
+ needprompt = doprompt;
+ } else {
+ pushstring(line, strlen(line), NULL);
+ }
+ }
+ }
}
- return 1;
+ goto checkend_return;
}
/*
- * Called when an unexpected token is read during the parse. The argument
- * is the token that is expected, or -1 if more than one type of token can
- * occur at this point.
+ * Parse a redirection operator. The variable "out" points to a string
+ * specifying the fd to be redirected. The variable "c" contains the
+ * first character of the redirection operator.
*/
-static void
-synexpect(token)
- int token;
-{
- char msg[64];
-
- if (token >= 0) {
- fmtstr(msg, 64, "%s unexpected (expecting %s)",
- tokname[lasttoken], tokname[token]);
- } else {
- fmtstr(msg, 64, "%s unexpected", tokname[lasttoken]);
- }
- synerror(msg);
- /* NOTREACHED */
-}
-
+parseredir: {
+ char fd = *out;
+ union node *np;
-static void
-synerror(msg)
- const char *msg;
- {
- if (commandname)
- outfmt(&errout, "%s: %d: ", commandname, startlinno);
- outfmt(&errout, "Syntax error: %s\n", msg);
- error((char *)NULL);
- /* NOTREACHED */
-}
+ np = (union node *)stalloc(sizeof (struct nfile));
+ if (c == '>') {
+ np->nfile.fd = 1;
+ c = pgetc();
+ if (c == '>')
+ np->type = NAPPEND;
+ else if (c == '&')
+ np->type = NTOFD;
+ else if (c == '|')
+ np->type = NTOOV;
+ else {
+ np->type = NTO;
+ pungetc();
+ }
+ } else { /* c == '<' */
+ np->nfile.fd = 0;
+ switch (c = pgetc()) {
+ case '<':
+ if (sizeof (struct nfile) != sizeof (struct nhere)) {
+ np = (union node *)stalloc(sizeof (struct nhere));
+ np->nfile.fd = 0;
+ }
+ np->type = NHERE;
+ heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc));
+ heredoc->here = np;
+ if ((c = pgetc()) == '-') {
+ heredoc->striptabs = 1;
+ } else {
+ heredoc->striptabs = 0;
+ pungetc();
+ }
+ break;
-static void
-setprompt(int which)
-{
- whichprompt = which;
- putprompt(getprompt(NULL));
-}
+ case '&':
+ np->type = NFROMFD;
+ break;
-/*
- * called by editline -- any expansions to the prompt
- * should be added here.
- */
-static const char *
-getprompt(void *unused)
- {
- switch (whichprompt) {
- case 0:
- return "";
- case 1:
- return ps1val();
- case 2:
- return ps2val();
- default:
- return "<internal prompt error>";
- }
-}
+ case '>':
+ np->type = NFROMTO;
+ break;
-static int
-isassignment(const char *word) {
- if (!is_name(*word)) {
- return 0;
+ default:
+ np->type = NFROM;
+ pungetc();
+ break;
+ }
}
- do {
- word++;
- } while (is_in_name(*word));
- return *word == '=';
+ if (fd != '\0')
+ np->nfile.fd = digit_val(fd);
+ redirnode = np;
+ goto parseredir_return;
}
-static const char *const *
-findkwd(const char *s) {
- return findstring(
- s, parsekwd, sizeof(parsekwd) / sizeof(const char *)
- );
-}
-/* $NetBSD: redir.c,v 1.22 2000/05/22 10:18:47 elric Exp $ */
/*
- * Code for dealing with input/output redirection.
+ * Parse a substitution. At this point, we have read the dollar sign
+ * and nothing else.
*/
-#define EMPTY -2 /* marks an unused slot in redirtab */
-#ifndef PIPE_BUF
-# define PIPESIZE 4096 /* amount of buffering in a pipe */
-#else
-# define PIPESIZE PIPE_BUF
-#endif
-
-
-struct redirtab *redirlist;
-
-/*
- * We keep track of whether or not fd0 has been redirected. This is for
- * background commands, where we want to redirect fd0 to /dev/null only
- * if it hasn't already been redirected.
-*/
-static int fd0_redirected = 0;
+parsesub: {
+ int subtype;
+ int typeloc;
+ int flags;
+ char *p;
+ static const char types[] = "}-+?=";
-/*
- * We also keep track of where fileno2 goes.
- */
-static int fileno2 = 2;
+ c = pgetc();
+ if (
+ c <= PEOA ||
+ (c != '(' && c != '{' && !is_name(c) && !is_special(c))
+ ) {
+ USTPUTC('$', out);
+ pungetc();
+ } else if (c == '(') { /* $(command) or $((arith)) */
+ if (pgetc() == '(') {
+ PARSEARITH();
+ } else {
+ pungetc();
+ PARSEBACKQNEW();
+ }
+ } else {
+ USTPUTC(CTLVAR, out);
+ typeloc = out - stackblock();
+ USTPUTC(VSNORMAL, out);
+ subtype = VSNORMAL;
+ if (c == '{') {
+ c = pgetc();
+ if (c == '#') {
+ if ((c = pgetc()) == '}')
+ c = '#';
+ else
+ subtype = VSLENGTH;
+ }
+ else
+ subtype = 0;
+ }
+ if (c > PEOA && is_name(c)) {
+ do {
+ STPUTC(c, out);
+ c = pgetc();
+ } while (c > PEOA && is_in_name(c));
+ } else if (is_digit(c)) {
+ do {
+ USTPUTC(c, out);
+ c = pgetc();
+ } while (is_digit(c));
+ }
+ else if (is_special(c)) {
+ USTPUTC(c, out);
+ c = pgetc();
+ }
+ else
+badsub: synerror("Bad substitution");
-static int openredirect __P((union node *));
-static void dupredirect __P((union node *, int, char[10 ]));
-static int openhere __P((union node *));
-static int noclobberopen __P((const char *));
+ STPUTC('=', out);
+ flags = 0;
+ if (subtype == 0) {
+ switch (c) {
+ case ':':
+ flags = VSNUL;
+ c = pgetc();
+ /*FALLTHROUGH*/
+ default:
+ p = strchr(types, c);
+ if (p == NULL)
+ goto badsub;
+ subtype = p - types + VSNORMAL;
+ break;
+ case '%':
+ case '#':
+ {
+ int cc = c;
+ subtype = c == '#' ? VSTRIMLEFT :
+ VSTRIMRIGHT;
+ c = pgetc();
+ if (c == cc)
+ subtype++;
+ else
+ pungetc();
+ break;
+ }
+ }
+ } else {
+ pungetc();
+ }
+ if (dblquote || arinest)
+ flags |= VSQUOTE;
+ *(stackblock() + typeloc) = subtype | flags;
+ if (subtype != VSNORMAL) {
+ varnest++;
+ if (dblquote) {
+ dqvarnest++;
+ }
+ }
+ }
+ goto parsesub_return;
+}
/*
- * Process a list of redirection commands. If the REDIR_PUSH flag is set,
- * old file descriptors are stashed away so that the redirection can be
- * undone by calling popredir. If the REDIR_BACKQ flag is set, then the
- * standard output, and the standard error if it becomes a duplicate of
- * stdout, is saved in memory.
+ * Called to parse command substitutions. Newstyle is set if the command
+ * is enclosed inside $(...); nlpp is a pointer to the head of the linked
+ * list of commands (passed by reference), and savelen is the number of
+ * characters on the top of the stack which must be preserved.
*/
-static void
-redirect(redir, flags)
- union node *redir;
- int flags;
- {
+parsebackq: {
+ struct nodelist **nlpp;
+ int savepbq;
union node *n;
- struct redirtab *sv = NULL;
- int i;
- int fd;
- int newfd;
- int try;
- char memory[10]; /* file descriptors to write to memory */
+ char *volatile str;
+ struct jmploc jmploc;
+ struct jmploc *volatile savehandler;
+ int savelen;
+ int saveprompt;
+#ifdef __GNUC__
+ (void) &saveprompt;
+#endif
- for (i = 10 ; --i >= 0 ; )
- memory[i] = 0;
- memory[1] = flags & REDIR_BACKQ;
- if (flags & REDIR_PUSH) {
- sv = ckmalloc(sizeof (struct redirtab));
- for (i = 0 ; i < 10 ; i++)
- sv->renamed[i] = EMPTY;
- sv->next = redirlist;
- redirlist = sv;
+ savepbq = parsebackquote;
+ if (setjmp(jmploc.loc)) {
+ if (str)
+ ckfree(str);
+ parsebackquote = 0;
+ handler = savehandler;
+ longjmp(handler->loc, 1);
}
- for (n = redir ; n ; n = n->nfile.next) {
- fd = n->nfile.fd;
- try = 0;
- if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) &&
- n->ndup.dupfd == fd)
- continue; /* redirect from/to same file descriptor */
+ INTOFF;
+ str = NULL;
+ savelen = out - stackblock();
+ if (savelen > 0) {
+ str = ckmalloc(savelen);
+ memcpy(str, stackblock(), savelen);
+ }
+ savehandler = handler;
+ handler = &jmploc;
+ INTON;
+ if (oldstyle) {
+ /* We must read until the closing backquote, giving special
+ treatment to some slashes, and then push the string and
+ reread it as input, interpreting it normally. */
+ char *pout;
+ int pc;
+ int psavelen;
+ char *pstr;
- INTOFF;
- newfd = openredirect(n);
- if (((flags & REDIR_PUSH) && sv->renamed[fd] == EMPTY) ||
- (fd == fileno2)) {
- if (newfd == fd) {
- try++;
- } else if ((i = fcntl(fd, F_DUPFD, 10)) == -1) {
- switch (errno) {
- case EBADF:
- if (!try) {
- dupredirect(n, newfd, memory);
- try++;
- break;
- }
- /* FALLTHROUGH*/
- default:
- if (newfd >= 0) {
- close(newfd);
- }
- INTON;
- error("%d: %s", fd, strerror(errno));
- /* NOTREACHED */
- }
+
+ STARTSTACKSTR(pout);
+ for (;;) {
+ if (needprompt) {
+ setprompt(2);
+ needprompt = 0;
}
- if (!try) {
- close(fd);
- if (flags & REDIR_PUSH) {
- sv->renamed[fd] = i;
+ switch (pc = pgetc()) {
+ case '`':
+ goto done;
+
+ case '\\':
+ if ((pc = pgetc()) == '\n') {
+ plinno++;
+ if (doprompt)
+ setprompt(2);
+ else
+ setprompt(0);
+ /*
+ * If eating a newline, avoid putting
+ * the newline into the new character
+ * stream (via the STPUTC after the
+ * switch).
+ */
+ continue;
}
- if (fd == fileno2) {
- fileno2 = i;
+ if (pc != '\\' && pc != '`' && pc != '$'
+ && (!dblquote || pc != '"'))
+ STPUTC('\\', pout);
+ if (pc > PEOA) {
+ break;
}
+ /* fall through */
+
+ case PEOF:
+#ifdef ASH_ALIAS
+ case PEOA:
+#endif
+ startlinno = plinno;
+ synerror("EOF in backquote substitution");
+
+ case '\n':
+ plinno++;
+ needprompt = doprompt;
+ break;
+
+ default:
+ break;
}
- } else if (fd != newfd) {
- close(fd);
+ STPUTC(pc, pout);
+ }
+done:
+ STPUTC('\0', pout);
+ psavelen = pout - stackblock();
+ if (psavelen > 0) {
+ pstr = grabstackstr(pout);
+ setinputstring(pstr);
}
- if (fd == 0)
- fd0_redirected++;
- if (!try)
- dupredirect(n, newfd, memory);
- INTON;
}
- if (memory[1])
- out1 = &memout;
- if (memory[2])
- out2 = &memout;
-}
+ nlpp = &bqlist;
+ while (*nlpp)
+ nlpp = &(*nlpp)->next;
+ *nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist));
+ (*nlpp)->next = NULL;
+ parsebackquote = oldstyle;
+ if (oldstyle) {
+ saveprompt = doprompt;
+ doprompt = 0;
+ }
-static int
-openredirect(redir)
- union node *redir;
- {
- char *fname;
- int f;
+ n = list(0);
- switch (redir->nfile.type) {
- case NFROM:
- fname = redir->nfile.expfname;
- if ((f = open(fname, O_RDONLY)) < 0)
- goto eopen;
- break;
- case NFROMTO:
- fname = redir->nfile.expfname;
- if ((f = open(fname, O_RDWR|O_CREAT|O_TRUNC, 0666)) < 0)
- goto ecreate;
- break;
- case NTO:
- /* Take care of noclobber mode. */
- if (Cflag) {
- fname = redir->nfile.expfname;
- if ((f = noclobberopen(fname)) < 0)
- goto ecreate;
- break;
- }
- case NTOOV:
- fname = redir->nfile.expfname;
-#ifdef O_CREAT
- if ((f = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
- goto ecreate;
-#else
- if ((f = creat(fname, 0666)) < 0)
- goto ecreate;
-#endif
- break;
- case NAPPEND:
- fname = redir->nfile.expfname;
-#ifdef O_APPEND
- if ((f = open(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0)
- goto ecreate;
-#else
- if ((f = open(fname, O_WRONLY)) < 0
- && (f = creat(fname, 0666)) < 0)
- goto ecreate;
- lseek(f, (off_t)0, 2);
-#endif
- break;
- default:
-#ifdef DEBUG
- abort();
-#endif
- /* Fall through to eliminate warning. */
- case NTOFD:
- case NFROMFD:
- f = -1;
- break;
- case NHERE:
- case NXHERE:
- f = openhere(redir);
- break;
+ if (oldstyle)
+ doprompt = saveprompt;
+ else {
+ if (readtoken() != TRP)
+ synexpect(TRP);
}
- return f;
-ecreate:
- error("cannot create %s: %s", fname, errmsg(errno, E_CREAT));
-eopen:
- error("cannot open %s: %s", fname, errmsg(errno, E_OPEN));
+ (*nlpp)->n = n;
+ if (oldstyle) {
+ /*
+ * Start reading from old file again, ignoring any pushed back
+ * tokens left from the backquote parsing
+ */
+ popfile();
+ tokpushback = 0;
+ }
+ while (stackblocksize() <= savelen)
+ growstackblock();
+ STARTSTACKSTR(out);
+ if (str) {
+ memcpy(out, str, savelen);
+ STADJUST(savelen, out);
+ INTOFF;
+ ckfree(str);
+ str = NULL;
+ INTON;
+ }
+ parsebackquote = savepbq;
+ handler = savehandler;
+ if (arinest || dblquote)
+ USTPUTC(CTLBACKQ | CTLQUOTE, out);
+ else
+ USTPUTC(CTLBACKQ, out);
+ if (oldstyle)
+ goto parsebackq_oldreturn;
+ else
+ goto parsebackq_newreturn;
}
+/*
+ * Parse an arithmetic expansion (indicate start of one and set state)
+ */
+parsearith: {
-static void
-dupredirect(redir, f, memory)
- union node *redir;
- int f;
- char memory[10];
- {
- int fd = redir->nfile.fd;
-
- memory[fd] = 0;
- if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) {
- if (redir->ndup.dupfd >= 0) { /* if not ">&-" */
- if (memory[redir->ndup.dupfd])
- memory[fd] = 1;
- else
- dup_as_newfd(redir->ndup.dupfd, fd);
- }
- return;
- }
-
- if (f != fd) {
- dup_as_newfd(f, fd);
- close(f);
+ if (++arinest == 1) {
+ prevsyntax = syntax;
+ syntax = ARISYNTAX;
+ USTPUTC(CTLARI, out);
+ if (dblquote)
+ USTPUTC('"',out);
+ else
+ USTPUTC(' ',out);
+ } else {
+ /*
+ * we collapse embedded arithmetic expansion to
+ * parenthesis, which should be equivalent
+ */
+ USTPUTC('(', out);
}
- return;
+ goto parsearith_return;
}
+} /* end of readtoken */
+
/*
- * Handle here documents. Normally we fork off a process to write the
- * data to a pipe. If the document is short, we can stuff the data in
- * the pipe without forking.
+ * Returns true if the text contains nothing to expand (no dollar signs
+ * or backquotes).
*/
static int
-openhere(redir)
- union node *redir;
+noexpand(text)
+ char *text;
{
- int pip[2];
- int len = 0;
+ char *p;
+ char c;
- if (pipe(pip) < 0)
- error("Pipe call failed");
- if (redir->type == NHERE) {
- len = strlen(redir->nhere.doc->narg.text);
- if (len <= PIPESIZE) {
- xwrite(pip[1], redir->nhere.doc->narg.text, len);
- goto out;
- }
- }
- if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
- close(pip[0]);
- signal(SIGINT, SIG_IGN);
- signal(SIGQUIT, SIG_IGN);
- signal(SIGHUP, SIG_IGN);
-#ifdef SIGTSTP
- signal(SIGTSTP, SIG_IGN);
-#endif
- signal(SIGPIPE, SIG_DFL);
- if (redir->type == NHERE)
- xwrite(pip[1], redir->nhere.doc->narg.text, len);
- else
- expandhere(redir->nhere.doc, pip[1]);
- _exit(0);
+ p = text;
+ while ((c = *p++) != '\0') {
+ if (c == CTLQUOTEMARK)
+ continue;
+ if (c == CTLESC)
+ p++;
+ else if (SIT(c,BASESYNTAX) == CCTL)
+ return 0;
}
-out:
- close(pip[1]);
- return pip[0];
+ return 1;
}
-
/*
- * Undo the effects of the last redirection.
+ * Return true if the argument is a legal variable name (a letter or
+ * underscore followed by zero or more letters, underscores, and digits).
*/
-static void
-popredir() {
- struct redirtab *rp = redirlist;
- int i;
+static int
+goodname(const char *name)
+{
+ const char *p;
- INTOFF;
- for (i = 0 ; i < 10 ; i++) {
- if (rp->renamed[i] != EMPTY) {
- if (i == 0)
- fd0_redirected--;
- close(i);
- if (rp->renamed[i] >= 0) {
- dup_as_newfd(rp->renamed[i], i);
- close(rp->renamed[i]);
- }
- if (rp->renamed[i] == fileno2) {
- fileno2 = i;
- }
- }
+ p = name;
+ if (! is_name(*p))
+ return 0;
+ while (*++p) {
+ if (! is_in_name(*p))
+ return 0;
}
- redirlist = rp->next;
- ckfree(rp);
- INTON;
+ return 1;
}
+
/*
- * Undo all redirections. Called on error or interrupt.
+ * Called when an unexpected token is read during the parse. The argument
+ * is the token that is expected, or -1 if more than one type of token can
+ * occur at this point.
*/
-#ifdef mkinit
-
-INCLUDE "redir.h"
-
-RESET {
- while (redirlist)
- popredir();
-}
+static void
+synexpect(token)
+ int token;
+{
+ char msg[64];
+ int l;
-SHELLPROC {
- clearredir();
+ l = sprintf(msg, "%s unexpected", tokname(lasttoken));
+ if (token >= 0)
+ sprintf(msg+l, " (expecting %s)", tokname(token));
+ synerror(msg);
+ /* NOTREACHED */
}
-#endif
-/* Return true if fd 0 has already been redirected at least once. */
-static int
-fd0_redirected_p () {
- return fd0_redirected != 0;
+static void
+synerror(const char *msg)
+{
+ if (commandname)
+ out2fmt("%s: %d: ", commandname, startlinno);
+ out2fmt("Syntax error: %s\n", msg);
+ error((char *)NULL);
+ /* NOTREACHED */
}
+
/*
- * Discard all saved file descriptors.
+ * called by editline -- any expansions to the prompt
+ * should be added here.
*/
-
static void
-clearredir() {
- struct redirtab *rp;
- int i;
-
- for (rp = redirlist ; rp ; rp = rp->next) {
- for (i = 0 ; i < 10 ; i++) {
- if (rp->renamed[i] >= 0) {
- close(rp->renamed[i]);
- if (rp->renamed[i] == fileno2) {
- fileno2 = -1;
- }
- }
- rp->renamed[i] = EMPTY;
- }
- }
- if (fileno2 != 2 && fileno2 >= 0) {
- close(fileno2);
- fileno2 = -1;
- }
+setprompt(int whichprompt)
+{
+ char *prompt;
+ switch (whichprompt) {
+ case 1:
+ prompt = ps1val();
+ break;
+ case 2:
+ prompt = ps2val();
+ break;
+ default: /* 0 */
+ prompt = "";
+ }
+ putprompt(prompt);
}
-
/*
- * Copy a file descriptor to be >= to. Returns -1
- * if the source file descriptor is closed, EMPTY if there are no unused
- * file descriptors left.
+ * Code for dealing with input/output redirection.
*/
-static int
-dup_as_newfd(from, to)
- int from;
- int to;
-{
- int newfd;
+#define EMPTY -2 /* marks an unused slot in redirtab */
+#ifndef PIPE_BUF
+# define PIPESIZE 4096 /* amount of buffering in a pipe */
+#else
+# define PIPESIZE PIPE_BUF
+#endif
- newfd = fcntl(from, F_DUPFD, to);
- if (newfd < 0) {
- if (errno == EMFILE)
- return EMPTY;
- else
- error("%d: %s", from, strerror(errno));
- }
- return newfd;
-}
/*
* Open a file in noclobber mode.
* The code was copied from bash.
*/
-static int
-noclobberopen(fname)
- const char *fname;
+static inline int
+noclobberopen(const char *fname)
{
int r, fd;
struct stat finfo, finfo2;
*/
if (fstat(fd, &finfo2) == 0 && !S_ISREG(finfo2.st_mode) &&
finfo.st_dev == finfo2.st_dev && finfo.st_ino == finfo2.st_ino)
- return fd;
+ return fd;
/* The file has been replaced. badness. */
close(fd);
errno = EEXIST;
return -1;
}
-/* $NetBSD: setmode.c,v 1.28 2000/01/25 15:43:43 enami Exp $ */
-
-#ifdef __weak_alias
-__weak_alias(getmode,_getmode)
-__weak_alias(setmode,_setmode)
-#endif
-
-#ifdef __GLIBC__
-#define S_ISTXT __S_ISVTX
-#endif
-
-#define SET_LEN 6 /* initial # of bitcmd struct to malloc */
-#define SET_LEN_INCR 4 /* # of bitcmd structs to add as needed */
-
-typedef struct bitcmd {
- char cmd;
- char cmd2;
- mode_t bits;
-} BITCMD;
-
-#define CMD2_CLR 0x01
-#define CMD2_SET 0x02
-#define CMD2_GBITS 0x04
-#define CMD2_OBITS 0x08
-#define CMD2_UBITS 0x10
-
-static BITCMD *addcmd __P((BITCMD *, int, int, int, u_int));
-static void compress_mode __P((BITCMD *));
-#ifdef SETMODE_DEBUG
-static void dumpmode __P((BITCMD *));
-#endif
/*
- * Given the old mode and an array of bitcmd structures, apply the operations
- * described in the bitcmd structures to the old mode, and return the new mode.
- * Note that there is no '=' command; a strict assignment is just a '-' (clear
- * bits) followed by a '+' (set bits).
+ * Handle here documents. Normally we fork off a process to write the
+ * data to a pipe. If the document is short, we can stuff the data in
+ * the pipe without forking.
*/
-mode_t
-getmode(bbox, omode)
- const void *bbox;
- mode_t omode;
-{
- const BITCMD *set;
- mode_t clrval, newmode, value;
- _DIAGASSERT(bbox != NULL);
+static inline int
+openhere(const union node *redir)
+{
+ int pip[2];
+ int len = 0;
- set = (const BITCMD *)bbox;
- newmode = omode;
- for (value = 0;; set++)
- switch(set->cmd) {
- /*
- * When copying the user, group or other bits around, we "know"
- * where the bits are in the mode so that we can do shifts to
- * copy them around. If we don't use shifts, it gets real
- * grundgy with lots of single bit checks and bit sets.
- */
- case 'u':
- value = (newmode & S_IRWXU) >> 6;
- goto common;
-
- case 'g':
- value = (newmode & S_IRWXG) >> 3;
- goto common;
-
- case 'o':
- value = newmode & S_IRWXO;
-common: if (set->cmd2 & CMD2_CLR) {
- clrval =
- (set->cmd2 & CMD2_SET) ? S_IRWXO : value;
- if (set->cmd2 & CMD2_UBITS)
- newmode &= ~((clrval<<6) & set->bits);
- if (set->cmd2 & CMD2_GBITS)
- newmode &= ~((clrval<<3) & set->bits);
- if (set->cmd2 & CMD2_OBITS)
- newmode &= ~(clrval & set->bits);
- }
- if (set->cmd2 & CMD2_SET) {
- if (set->cmd2 & CMD2_UBITS)
- newmode |= (value<<6) & set->bits;
- if (set->cmd2 & CMD2_GBITS)
- newmode |= (value<<3) & set->bits;
- if (set->cmd2 & CMD2_OBITS)
- newmode |= value & set->bits;
- }
- break;
+ if (pipe(pip) < 0)
+ error("Pipe call failed");
+ if (redir->type == NHERE) {
+ len = strlen(redir->nhere.doc->narg.text);
+ if (len <= PIPESIZE) {
+ xwrite(pip[1], redir->nhere.doc->narg.text, len);
+ goto out;
+ }
+ }
+ if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
+ close(pip[0]);
+ signal(SIGINT, SIG_IGN);
+ signal(SIGQUIT, SIG_IGN);
+ signal(SIGHUP, SIG_IGN);
+#ifdef SIGTSTP
+ signal(SIGTSTP, SIG_IGN);
+#endif
+ signal(SIGPIPE, SIG_DFL);
+ if (redir->type == NHERE)
+ xwrite(pip[1], redir->nhere.doc->narg.text, len);
+ else
+ expandhere(redir->nhere.doc, pip[1]);
+ _exit(0);
+ }
+out:
+ close(pip[1]);
+ return pip[0];
+}
- case '+':
- newmode |= set->bits;
- break;
- case '-':
- newmode &= ~set->bits;
- break;
+static inline int
+openredirect(const union node *redir)
+{
+ char *fname;
+ int f;
- case 'X':
- if (omode & (S_IFDIR|S_IXUSR|S_IXGRP|S_IXOTH))
- newmode |= set->bits;
+ switch (redir->nfile.type) {
+ case NFROM:
+ fname = redir->nfile.expfname;
+ if ((f = open(fname, O_RDONLY)) < 0)
+ goto eopen;
+ break;
+ case NFROMTO:
+ fname = redir->nfile.expfname;
+ if ((f = open(fname, O_RDWR|O_CREAT|O_TRUNC, 0666)) < 0)
+ goto ecreate;
+ break;
+ case NTO:
+ /* Take care of noclobber mode. */
+ if (Cflag) {
+ fname = redir->nfile.expfname;
+ if ((f = noclobberopen(fname)) < 0)
+ goto ecreate;
break;
-
- case '\0':
- default:
-#ifdef SETMODE_DEBUG
- (void)printf("getmode:%04o -> %04o\n", omode, newmode);
-#endif
- return (newmode);
}
+ case NTOOV:
+ fname = redir->nfile.expfname;
+#ifdef O_CREAT
+ if ((f = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
+ goto ecreate;
+#else
+ if ((f = creat(fname, 0666)) < 0)
+ goto ecreate;
+#endif
+ break;
+ case NAPPEND:
+ fname = redir->nfile.expfname;
+#ifdef O_APPEND
+ if ((f = open(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0)
+ goto ecreate;
+#else
+ if ((f = open(fname, O_WRONLY)) < 0
+ && (f = creat(fname, 0666)) < 0)
+ goto ecreate;
+ lseek(f, (off_t)0, 2);
+#endif
+ break;
+ default:
+#ifdef DEBUG
+ abort();
+#endif
+ /* Fall through to eliminate warning. */
+ case NTOFD:
+ case NFROMFD:
+ f = -1;
+ break;
+ case NHERE:
+ case NXHERE:
+ f = openhere(redir);
+ break;
+ }
+
+ return f;
+ecreate:
+ error("cannot create %s: %s", fname, errmsg(errno, E_CREAT));
+eopen:
+ error("cannot open %s: %s", fname, errmsg(errno, E_OPEN));
}
-#define ADDCMD(a, b, c, d) do { \
- if (set >= endset) { \
- BITCMD *newset; \
- setlen += SET_LEN_INCR; \
- newset = realloc(saveset, sizeof(BITCMD) * setlen); \
- if (newset == NULL) { \
- free(saveset); \
- return (NULL); \
- } \
- set = newset + (set - saveset); \
- saveset = newset; \
- endset = newset + (setlen - 2); \
- } \
- set = addcmd(set, (a), (b), (c), (d)); \
-} while (/*CONSTCOND*/0)
-#define STANDARD_BITS (S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO)
+/*
+ * Process a list of redirection commands. If the REDIR_PUSH flag is set,
+ * old file descriptors are stashed away so that the redirection can be
+ * undone by calling popredir. If the REDIR_BACKQ flag is set, then the
+ * standard output, and the standard error if it becomes a duplicate of
+ * stdout.
+ */
-static void *
-setmode(p)
- const char *p;
+static void
+redirect(union node *redir, int flags)
{
- int perm, who;
- char op, *ep;
- BITCMD *set, *saveset, *endset;
- sigset_t mysigset, sigoset;
- mode_t mask;
- int equalopdone = 0; /* pacify gcc */
- int permXbits, setlen;
-
- if (!*p)
- return (NULL);
-
- /*
- * Get a copy of the mask for the permissions that are mask relative.
- * Flip the bits, we want what's not set. Since it's possible that
- * the caller is opening files inside a signal handler, protect them
- * as best we can.
- */
- sigfillset(&mysigset);
- (void)sigprocmask(SIG_BLOCK, &mysigset, &sigoset);
- (void)umask(mask = umask(0));
- mask = ~mask;
- (void)sigprocmask(SIG_SETMASK, &sigoset, NULL);
-
- setlen = SET_LEN + 2;
-
- if ((set = malloc((u_int)(sizeof(BITCMD) * setlen))) == NULL)
- return (NULL);
- saveset = set;
- endset = set + (setlen - 2);
+ union node *n;
+ struct redirtab *sv = NULL;
+ int i;
+ int fd;
+ int newfd;
+ int try;
+ int fd1dup = flags & REDIR_BACKQ;; /* stdout `cmd` redir to pipe */
- /*
- * If an absolute number, get it and return; disallow non-octal digits
- * or illegal bits.
- */
- if (isdigit((unsigned char)*p)) {
- perm = (mode_t)strtol(p, &ep, 8);
- if (*ep || perm & ~(STANDARD_BITS|S_ISTXT)) {
- free(saveset);
- return (NULL);
- }
- ADDCMD('=', (STANDARD_BITS|S_ISTXT), perm, mask);
- set->cmd = 0;
- return (saveset);
+ if (flags & REDIR_PUSH) {
+ sv = ckmalloc(sizeof (struct redirtab));
+ for (i = 0 ; i < 10 ; i++)
+ sv->renamed[i] = EMPTY;
+ sv->next = redirlist;
+ redirlist = sv;
}
+ for (n = redir ; n ; n = n->nfile.next) {
+ fd = n->nfile.fd;
+ try = 0;
+ if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) &&
+ n->ndup.dupfd == fd)
+ continue; /* redirect from/to same file descriptor */
- /*
- * Build list of structures to set/clear/copy bits as described by
- * each clause of the symbolic mode.
- */
- for (;;) {
- /* First, find out which bits might be modified. */
- for (who = 0;; ++p) {
- switch (*p) {
- case 'a':
- who |= STANDARD_BITS;
- break;
- case 'u':
- who |= S_ISUID|S_IRWXU;
- break;
- case 'g':
- who |= S_ISGID|S_IRWXG;
- break;
- case 'o':
- who |= S_IRWXO;
- break;
- default:
- goto getop;
- }
- }
-
-getop: if ((op = *p++) != '+' && op != '-' && op != '=') {
- free(saveset);
- return (NULL);
- }
- if (op == '=')
- equalopdone = 0;
-
- who &= ~S_ISTXT;
- for (perm = 0, permXbits = 0;; ++p) {
- switch (*p) {
- case 'r':
- perm |= S_IRUSR|S_IRGRP|S_IROTH;
- break;
- case 's':
- /*
- * If specific bits where requested and
- * only "other" bits ignore set-id.
- */
- if (who == 0 || (who & ~S_IRWXO))
- perm |= S_ISUID|S_ISGID;
- break;
- case 't':
- /*
- * If specific bits where requested and
- * only "other" bits ignore set-id.
- */
- if (who == 0 || (who & ~S_IRWXO)) {
- who |= S_ISTXT;
- perm |= S_ISTXT;
- }
- break;
- case 'w':
- perm |= S_IWUSR|S_IWGRP|S_IWOTH;
- break;
- case 'X':
- permXbits = S_IXUSR|S_IXGRP|S_IXOTH;
- break;
- case 'x':
- perm |= S_IXUSR|S_IXGRP|S_IXOTH;
- break;
- case 'u':
- case 'g':
- case 'o':
- /*
- * When ever we hit 'u', 'g', or 'o', we have
- * to flush out any partial mode that we have,
- * and then do the copying of the mode bits.
- */
- if (perm) {
- ADDCMD(op, who, perm, mask);
- perm = 0;
- }
- if (op == '=')
- equalopdone = 1;
- if (op == '+' && permXbits) {
- ADDCMD('X', who, permXbits, mask);
- permXbits = 0;
- }
- ADDCMD(*p, who, op, mask);
- break;
-
- default:
- /*
- * Add any permissions that we haven't already
- * done.
- */
- if (perm || (op == '=' && !equalopdone)) {
- if (op == '=')
- equalopdone = 1;
- ADDCMD(op, who, perm, mask);
- perm = 0;
+ INTOFF;
+ newfd = openredirect(n);
+ if ((flags & REDIR_PUSH) && sv->renamed[fd] == EMPTY) {
+ if (newfd == fd) {
+ try++;
+ } else if ((i = fcntl(fd, F_DUPFD, 10)) == -1) {
+ switch (errno) {
+ case EBADF:
+ if (!try) {
+ dupredirect(n, newfd, fd1dup);
+ try++;
+ break;
+ }
+ /* FALLTHROUGH*/
+ default:
+ if (newfd >= 0) {
+ close(newfd);
+ }
+ INTON;
+ error("%d: %m", fd);
+ /* NOTREACHED */
}
- if (permXbits) {
- ADDCMD('X', who, permXbits, mask);
- permXbits = 0;
+ }
+ if (!try) {
+ close(fd);
+ if (flags & REDIR_PUSH) {
+ sv->renamed[fd] = i;
}
- goto apply;
}
+ } else if (fd != newfd) {
+ close(fd);
}
-
-apply: if (!*p)
- break;
- if (*p != ',')
- goto getop;
- ++p;
+ if (fd == 0)
+ fd0_redirected++;
+ if (!try)
+ dupredirect(n, newfd, fd1dup);
+ INTON;
}
- set->cmd = 0;
-#ifdef SETMODE_DEBUG
- (void)printf("Before compress_mode()\n");
- dumpmode(saveset);
-#endif
- compress_mode(saveset);
-#ifdef SETMODE_DEBUG
- (void)printf("After compress_mode()\n");
- dumpmode(saveset);
-#endif
- return (saveset);
}
-static BITCMD *
-addcmd(set, op, who, oparg, mask)
- BITCMD *set;
- int oparg, who;
- int op;
- u_int mask;
-{
-
- _DIAGASSERT(set != NULL);
- switch (op) {
- case '=':
- set->cmd = '-';
- set->bits = who ? who : STANDARD_BITS;
- set++;
+static void
+dupredirect(const union node *redir, int f, int fd1dup)
+{
+ int fd = redir->nfile.fd;
- op = '+';
- /* FALLTHROUGH */
- case '+':
- case '-':
- case 'X':
- set->cmd = op;
- set->bits = (who ? who : mask) & oparg;
- break;
+ if(fd==1)
+ fd1dup = 0;
+ if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) {
+ if (redir->ndup.dupfd >= 0) { /* if not ">&-" */
+ if (redir->ndup.dupfd!=1 || fd1dup!=1)
+ dup_as_newfd(redir->ndup.dupfd, fd);
+ }
+ return;
+ }
- case 'u':
- case 'g':
- case 'o':
- set->cmd = op;
- if (who) {
- set->cmd2 = ((who & S_IRUSR) ? CMD2_UBITS : 0) |
- ((who & S_IRGRP) ? CMD2_GBITS : 0) |
- ((who & S_IROTH) ? CMD2_OBITS : 0);
- set->bits = (mode_t)~0;
- } else {
- set->cmd2 = CMD2_UBITS | CMD2_GBITS | CMD2_OBITS;
- set->bits = mask;
- }
-
- if (oparg == '+')
- set->cmd2 |= CMD2_SET;
- else if (oparg == '-')
- set->cmd2 |= CMD2_CLR;
- else if (oparg == '=')
- set->cmd2 |= CMD2_SET|CMD2_CLR;
- break;
+ if (f != fd) {
+ dup_as_newfd(f, fd);
+ close(f);
}
- return (set + 1);
+ return;
}
-#ifdef SETMODE_DEBUG
-static void
-dumpmode(set)
- BITCMD *set;
-{
-
- _DIAGASSERT(set != NULL);
- for (; set->cmd; ++set)
- (void)printf("cmd: '%c' bits %04o%s%s%s%s%s%s\n",
- set->cmd, set->bits, set->cmd2 ? " cmd2:" : "",
- set->cmd2 & CMD2_CLR ? " CLR" : "",
- set->cmd2 & CMD2_SET ? " SET" : "",
- set->cmd2 & CMD2_UBITS ? " UBITS" : "",
- set->cmd2 & CMD2_GBITS ? " GBITS" : "",
- set->cmd2 & CMD2_OBITS ? " OBITS" : "");
-}
-#endif
/*
- * Given an array of bitcmd structures, compress by compacting consecutive
- * '+', '-' and 'X' commands into at most 3 commands, one of each. The 'u',
- * 'g' and 'o' commands continue to be separate. They could probably be
- * compacted, but it's not worth the effort.
+ * Undo the effects of the last redirection.
*/
+
static void
-compress_mode(set)
- BITCMD *set;
+popredir(void)
{
- BITCMD *nset;
- int setbits, clrbits, Xbits, op;
-
- _DIAGASSERT(set != NULL);
+ struct redirtab *rp = redirlist;
+ int i;
- for (nset = set;;) {
- /* Copy over any 'u', 'g' and 'o' commands. */
- while ((op = nset->cmd) != '+' && op != '-' && op != 'X') {
- *set++ = *nset++;
- if (!op)
- return;
+ INTOFF;
+ for (i = 0 ; i < 10 ; i++) {
+ if (rp->renamed[i] != EMPTY) {
+ if (i == 0)
+ fd0_redirected--;
+ close(i);
+ if (rp->renamed[i] >= 0) {
+ dup_as_newfd(rp->renamed[i], i);
+ close(rp->renamed[i]);
+ }
}
+ }
+ redirlist = rp->next;
+ ckfree(rp);
+ INTON;
+}
- for (setbits = clrbits = Xbits = 0;; nset++) {
- if ((op = nset->cmd) == '-') {
- clrbits |= nset->bits;
- setbits &= ~nset->bits;
- Xbits &= ~nset->bits;
- } else if (op == '+') {
- setbits |= nset->bits;
- clrbits &= ~nset->bits;
- Xbits &= ~nset->bits;
- } else if (op == 'X')
- Xbits |= nset->bits & ~setbits;
- else
- break;
- }
- if (clrbits) {
- set->cmd = '-';
- set->cmd2 = 0;
- set->bits = clrbits;
- set++;
- }
- if (setbits) {
- set->cmd = '+';
- set->cmd2 = 0;
- set->bits = setbits;
- set++;
- }
- if (Xbits) {
- set->cmd = 'X';
- set->cmd2 = 0;
- set->bits = Xbits;
- set++;
+/*
+ * Discard all saved file descriptors.
+ */
+
+static void
+clearredir(void) {
+ struct redirtab *rp;
+ int i;
+
+ for (rp = redirlist ; rp ; rp = rp->next) {
+ for (i = 0 ; i < 10 ; i++) {
+ if (rp->renamed[i] >= 0) {
+ close(rp->renamed[i]);
+ }
+ rp->renamed[i] = EMPTY;
}
}
}
-/* $NetBSD: show.c,v 1.18 1999/10/08 21:10:44 pk Exp $ */
+/*
+ * Copy a file descriptor to be >= to. Returns -1
+ * if the source file descriptor is closed, EMPTY if there are no unused
+ * file descriptors left.
+ */
+
+static int
+dup_as_newfd(from, to)
+ int from;
+ int to;
+{
+ int newfd;
+
+ newfd = fcntl(from, F_DUPFD, to);
+ if (newfd < 0) {
+ if (errno == EMFILE)
+ return EMPTY;
+ else
+ error("%d: %m", from);
+ }
+ return newfd;
+}
+
#ifdef DEBUG
-static void shtree __P((union node *, int, char *, FILE*));
-static void shcmd __P((union node *, FILE *));
-static void sharg __P((union node *, FILE *));
-static void indent __P((int, char *, FILE *));
-static void trstring __P((char *));
+static void shtree (union node *, int, char *, FILE*);
+static void shcmd (union node *, FILE *);
+static void sharg (union node *, FILE *);
+static void indent (int, char *, FILE *);
+static void trstring (char *);
static void
for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
if (! first)
putchar(' ');
+#if 1
+ s = "*error*";
+ dftfd = 0;
+ if ((np->nfile.type <= NFROMFD) && (np->nfile.type >= NTO)) {
+ s = redir_strings[np->nfile.type - NTO];
+ if (*s == '>') {
+ dftfd = 1;
+ }
+ }
+#else
switch (np->nfile.type) {
- case NTO: s = ">"; dftfd = 1; break;
- case NAPPEND: s = ">>"; dftfd = 1; break;
- case NTOFD: s = ">&"; dftfd = 1; break;
- case NTOOV: s = ">|"; dftfd = 1; break;
- case NFROM: s = "<"; dftfd = 0; break;
- case NFROMFD: s = "<&"; dftfd = 0; break;
- case NFROMTO: s = "<>"; dftfd = 0; break;
- default: s = "*error*"; dftfd = 0; break;
+ case NTO: s = ">"; dftfd = 1; break;
+ case NAPPEND: s = ">>"; dftfd = 1; break;
+ case NTOFD: s = ">&"; dftfd = 1; break;
+ case NTOOV: s = ">|"; dftfd = 1; break;
+ case NFROM: s = "<"; dftfd = 0; break;
+ case NFROMFD: s = "<&"; dftfd = 0; break;
+ case NFROMTO: s = "<>"; dftfd = 0; break;
+ default: s = "*error*"; dftfd = 0; break;
}
+#endif
if (np->nfile.fd != dftfd)
fprintf(fp, "%d", np->nfile.fd);
fputs(s, fp);
trace(const char *fmt, ...)
{
va_list va;
-#ifdef __STDC__
va_start(va, fmt);
-#else
- char *fmt;
- va_start(va);
- fmt = va_arg(va, char *);
-#endif
if (tracefile != NULL) {
(void) vfprintf(tracefile, fmt, va);
if (strchr(fmt, '\n'))
case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
case CTLBACKQ: c = 'q'; goto backslash;
case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
-backslash: putc('\\', tracefile);
+backslash: putc('\\', tracefile);
putc(c, tracefile);
break;
default:
else
p = "/tmp";
}
- scopy(p, s);
+ strcpy(s, p);
strcat(s, "/trace");
}
#else
- scopy("./trace", s);
+ strcpy(s, "./trace");
#endif /* not_this_way */
if ((tracefile = fopen(s, "a")) == NULL) {
fprintf(stderr, "Can't open %s\n", s);
#endif /* DEBUG */
-/*
- * This file was generated by the mksyntax program.
- */
-
-/* syntax table used when not in quotes */
-static const char basesyntax[257] = {
- CEOF, CSPCL, CWORD, CCTL,
- CCTL, CCTL, CCTL, CCTL,
- CCTL, CCTL, CCTL, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CSPCL,
- CNL, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CSPCL, CWORD,
- CDQUOTE, CWORD, CVAR, CWORD,
- CSPCL, CSQUOTE, CSPCL, CSPCL,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CSPCL, CSPCL, CWORD,
- CSPCL, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CBACK, CWORD,
- CWORD, CWORD, CBQUOTE, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CSPCL, CENDVAR,
- CWORD
-};
-
-/* syntax table used when in double quotes */
-static const char dqsyntax[257] = {
- CEOF, CIGN, CWORD, CCTL,
- CCTL, CCTL, CCTL, CCTL,
- CCTL, CCTL, CCTL, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CNL, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CCTL,
- CENDQUOTE,CWORD, CVAR, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CCTL, CWORD, CWORD, CCTL,
- CWORD, CCTL, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CCTL, CWORD, CWORD, CCTL,
- CWORD, CCTL, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CCTL, CBACK, CCTL,
- CWORD, CWORD, CBQUOTE, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CENDVAR,
- CCTL
-};
-
-/* syntax table used when in single quotes */
-static const char sqsyntax[257] = {
- CEOF, CIGN, CWORD, CCTL,
- CCTL, CCTL, CCTL, CCTL,
- CCTL, CCTL, CCTL, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CNL, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CCTL,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CENDQUOTE,CWORD, CWORD,
- CCTL, CWORD, CWORD, CCTL,
- CWORD, CCTL, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CCTL, CWORD, CWORD, CCTL,
- CWORD, CCTL, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CCTL, CCTL, CCTL,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CCTL
-};
-
-/* syntax table used when in arithmetic */
-static const char arisyntax[257] = {
- CEOF, CIGN, CWORD, CCTL,
- CCTL, CCTL, CCTL, CCTL,
- CCTL, CCTL, CCTL, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CNL, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CDQUOTE, CWORD, CVAR, CWORD,
- CWORD, CSQUOTE, CLP, CRP,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CBACK, CWORD,
- CWORD, CWORD, CBQUOTE, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CWORD,
- CWORD, CWORD, CWORD, CENDVAR,
- CWORD
-};
-
-/* character classification table */
-static const char is_type[257] = {
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, ISSPECL,
- 0, ISSPECL, ISSPECL, 0,
- 0, 0, 0, 0,
- ISSPECL, 0, 0, ISSPECL,
- 0, 0, ISDIGIT, ISDIGIT,
- ISDIGIT, ISDIGIT, ISDIGIT, ISDIGIT,
- ISDIGIT, ISDIGIT, ISDIGIT, ISDIGIT,
- 0, 0, 0, 0,
- 0, ISSPECL, ISSPECL, ISUPPER,
- ISUPPER, ISUPPER, ISUPPER, ISUPPER,
- ISUPPER, ISUPPER, ISUPPER, ISUPPER,
- ISUPPER, ISUPPER, ISUPPER, ISUPPER,
- ISUPPER, ISUPPER, ISUPPER, ISUPPER,
- ISUPPER, ISUPPER, ISUPPER, ISUPPER,
- ISUPPER, ISUPPER, ISUPPER, ISUPPER,
- ISUPPER, 0, 0, 0,
- 0, ISUNDER, 0, ISLOWER,
- ISLOWER, ISLOWER, ISLOWER, ISLOWER,
- ISLOWER, ISLOWER, ISLOWER, ISLOWER,
- ISLOWER, ISLOWER, ISLOWER, ISLOWER,
- ISLOWER, ISLOWER, ISLOWER, ISLOWER,
- ISLOWER, ISLOWER, ISLOWER, ISLOWER,
- ISLOWER, ISLOWER, ISLOWER, ISLOWER,
- ISLOWER, 0, 0, 0,
- 0
-};
-/* $NetBSD: trap.c,v 1.25 2001/02/04 19:52:07 christos Exp $ */
-
/*
* The trap builtin.
*/
for (signo = 0 ; signo < NSIG ; signo++) {
if (trap[signo] != NULL) {
char *p;
+ const char *sn;
p = single_quote(trap[signo]);
- out1fmt("trap -- %s %s\n", p,
- signal_names[signo] + (signo ? 3 : 0)
- );
+ sn = sys_siglist[signo];
+ if(sn==NULL)
+ sn = u_signal_names(0, &signo, 0);
+ if(sn==NULL)
+ sn = "???";
+ printf("trap -- %s %s\n", p, sn);
stunalloc(p);
}
}
-/*
- * Clear traps on a fork.
- */
-
-static void
-clear_traps() {
- char **tp;
-
- for (tp = trap ; tp < &trap[NSIG] ; tp++) {
- if (*tp && **tp) { /* trap not NULL or SIG_IGN */
- INTOFF;
- ckfree(*tp);
- *tp = NULL;
- if (tp != &trap[0])
- setsignal(tp - trap);
- INTON;
- }
- }
-}
*/
static void
-setsignal(signo)
- int signo;
+setsignal(int signo)
{
int action;
char *t;
case SIGQUIT:
#ifdef DEBUG
{
- extern int debug;
if (debug)
break;
if (iflag)
action = S_IGN;
break;
-#if JOBS
+#ifdef JOBS
case SIGTSTP:
case SIGTTOU:
if (mflag)
if (act.sa_handler == SIG_IGN) {
if (mflag && (signo == SIGTSTP ||
signo == SIGTTIN || signo == SIGTTOU)) {
- *t = S_IGN; /* don't hard ignore these */
+ *t = S_IGN; /* don't hard ignore these */
} else
*t = S_HARD_IGN;
} else {
- *t = S_RESET; /* force to be set */
+ *t = S_RESET; /* force to be set */
}
}
if (*t == S_HARD_IGN || *t == action)
return;
- switch (action) {
- case S_CATCH:
- act.sa_handler = onsig;
- break;
- case S_IGN:
- act.sa_handler = SIG_IGN;
- break;
- default:
- act.sa_handler = SIG_DFL;
- }
+ act.sa_handler = ((action == S_CATCH) ? onsig
+ : ((action == S_IGN) ? SIG_IGN : SIG_DFL));
*t = action;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
}
-#ifdef mkinit
-INCLUDE <signal.h>
-INCLUDE "trap.h"
-
-SHELLPROC {
- char *sm;
-
- clear_traps();
- for (sm = sigmode ; sm < sigmode + NSIG - 1; sm++) {
- if (*sm == S_IGN)
- *sm = S_HARD_IGN;
- }
-}
-#endif
-
-
-
/*
* Signal handler.
*/
static void
-onsig(signo)
- int signo;
+onsig(int signo)
{
if (signo == SIGINT && trap[SIGINT] == NULL) {
onint();
}
-
/*
* Called to execute a trap. Perhaps we should avoid entering new trap
* handlers while we are executing a trap handler.
*/
static void
-dotrap() {
+dotrap(void)
+{
int i;
int savestatus;
pendingsigs = 0;
}
-
-
-/*
- * Controls whether the shell is interactive or not.
- */
-
-
-static void
-setinteractive(on)
- int on;
-{
- static int is_interactive;
-
- if (on == is_interactive)
- return;
- setsignal(SIGINT);
- setsignal(SIGQUIT);
- setsignal(SIGTERM);
- chkmail(1);
- is_interactive = on;
-}
-
-
-
/*
* Called to exit the shell.
*/
static void
-exitshell(status)
- int status;
+exitshell(int status)
{
struct jmploc loc1, loc2;
char *p;
trap[0] = NULL;
evalstring(p, 0);
}
-l1: handler = &loc2; /* probably unnecessary */
+l1: handler = &loc2; /* probably unnecessary */
flushall();
-#if JOBS
+#ifdef JOBS
setjobctl(0);
#endif
l2: _exit(status);
static int decode_signal(const char *string, int minsig)
{
int signo;
+ const char *name = u_signal_names(string, &signo, minsig);
- if (is_number(string)) {
- signo = atoi(string);
- if (signo >= NSIG) {
- return -1;
- }
- return signo;
- }
-
- signo = minsig;
- if (!signo) {
- goto zero;
- }
- for (; signo < NSIG; signo++) {
- if (!strcasecmp(string, &(signal_names[signo])[3])) {
- return signo;
- }
-zero:
- if (!strcasecmp(string, signal_names[signo])) {
- return signo;
- }
- }
-
- return -1;
+ return name ? signo : -1;
}
-/* $NetBSD: var.c,v 1.27 2001/02/04 19:52:07 christos Exp $ */
-
-#define VTABSIZE 39
-
-
-struct varinit {
- struct var *var;
- int flags;
- const char *text;
- void (*func) __P((const char *));
-};
-
-struct localvar *localvars;
-
-#if ATTY
-struct var vatty;
-#endif
-struct var vifs;
-struct var vmail;
-struct var vmpath;
-struct var vpath;
-struct var vps1;
-struct var vps2;
-struct var vvers;
-struct var voptind;
-
-static const char defpathvar[] =
- "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin";
-#ifdef IFS_BROKEN
-static const char defifsvar[] = "IFS= \t\n";
-#else
-static const char defifs[] = " \t\n";
-#endif
-
-static const struct varinit varinit[] = {
-#if ATTY
- { &vatty, VSTRFIXED|VTEXTFIXED|VUNSET, "ATTY=",
- NULL },
-#endif
-#ifdef IFS_BROKEN
- { &vifs, VSTRFIXED|VTEXTFIXED, defifsvar,
-#else
- { &vifs, VSTRFIXED|VTEXTFIXED|VUNSET, "IFS=",
-#endif
- NULL },
- { &vmail, VSTRFIXED|VTEXTFIXED|VUNSET, "MAIL=",
- NULL },
- { &vmpath, VSTRFIXED|VTEXTFIXED|VUNSET, "MAILPATH=",
- NULL },
- { &vpath, VSTRFIXED|VTEXTFIXED, defpathvar,
- changepath },
- /*
- * vps1 depends on uid
- */
- { &vps2, VSTRFIXED|VTEXTFIXED, "PS2=> ",
- NULL },
- { &voptind, VSTRFIXED|VTEXTFIXED, "OPTIND=1",
- getoptsreset },
- { NULL, 0, NULL,
- NULL }
-};
-
-struct var *vartab[VTABSIZE];
-static struct var **hashvar __P((const char *));
-static void showvars __P((const char *, int, int));
-static struct var **findvar __P((struct var **, const char *));
+static struct var **hashvar (const char *);
+static void showvars (const char *, int, int);
+static struct var **findvar (struct var **, const char *);
/*
* Initialize the varable symbol tables and import the environment
*/
-#ifdef mkinit
-INCLUDE <unistd.h>
-INCLUDE "output.h"
-INCLUDE "var.h"
-static char **environ;
-INIT {
- char **envp;
- char ppid[32];
-
- initvar();
- for (envp = environ ; *envp ; envp++) {
- if (strchr(*envp, '=')) {
- setvareq(*envp, VEXPORT|VTEXTFIXED);
- }
- }
-
- fmtstr(ppid, sizeof(ppid), "%d", (int) getppid());
- setvar("PPID", ppid, 0);
-}
-#endif
-
-
/*
* This routine initializes the builtin variables. It is called when the
* shell is initialized and again when a shell procedure is spawned.
namelen = p - name;
if (isbad)
error("%.*s: bad variable name", namelen, name);
- len = namelen + 2; /* 2 is space for '=' and '\0' */
+ len = namelen + 2; /* 2 is space for '=' and '\0' */
if (val == NULL) {
flags |= VUNSET;
} else {
* Find the value of a variable. Returns NULL if not set.
*/
-static char *
+static const char *
lookupvar(name)
const char *name;
{
* Search the environment of a builtin command.
*/
-static char *
-bltinlookup(name)
- const char *name;
+static const char *
+bltinlookup(const char *name)
{
- struct strlist *sp;
+ const struct strlist *sp;
for (sp = cmdenviron ; sp ; sp = sp->next) {
if (varequal(sp->text, name))
* VSTACK set since these are currently allocated on the stack.
*/
-#ifdef mkinit
-static void shprocvar __P((void));
-
-SHELLPROC {
- shprocvar();
-}
-#endif
-
static void
-shprocvar() {
+shprocvar(void) {
struct var **vpp;
struct var *vp, **prev;
* The "local" command.
*/
+/* funcnest nonzero if we are currently evaluating a function */
+
static int
localcmd(argc, argv)
int argc;
{
char *name;
- if (! in_function())
+ if (! funcnest)
error("Not in a function");
while ((name = *argptr++) != NULL) {
mklocal(name);
lvp = ckmalloc(sizeof (struct localvar));
if (name[0] == '-' && name[1] == '\0') {
char *p;
- p = ckmalloc(sizeof optlist);
- lvp->text = memcpy(p, optlist, sizeof optlist);
+ p = ckmalloc(sizeof optet_vals);
+ lvp->text = memcpy(p, optet_vals, sizeof optet_vals);
vp = NULL;
} else {
vpp = hashvar(name);
setvareq(savestr(name), VSTRFIXED);
else
setvar(name, NULL, VSTRFIXED);
- vp = *vpp; /* the new variable */
+ vp = *vpp; /* the new variable */
lvp->text = NULL;
lvp->flags = VUNSET;
} else {
while ((lvp = localvars) != NULL) {
localvars = lvp->next;
vp = lvp->vp;
- if (vp == NULL) { /* $- saved */
- memcpy(optlist, lvp->text, sizeof optlist);
+ if (vp == NULL) { /* $- saved */
+ memcpy(optet_vals, lvp->text, sizeof optet_vals);
ckfree(lvp->text);
} else if ((lvp->flags & (VUNSET|VSTRFIXED)) == VUNSET) {
(void)unsetvar(vp->text);
*/
static int
-unsetvar(s)
- const char *s;
- {
+unsetvar(const char *s)
+{
struct var **vpp;
struct var *vp;
*/
static struct var **
-hashvar(p)
- const char *p;
- {
+hashvar(const char *p)
+{
unsigned int hashval;
hashval = ((unsigned char) *p) << 4;
*/
static int
-varequal(p, q)
- const char *p, *q;
- {
+varequal(const char *p, const char *q)
+{
while (*p == *q++) {
if (*p++ == '=')
return 1;
len = p - vp->text;
p = single_quote(p);
- out1fmt(
- "%s%s%.*s%s\n", myprefix, sep, len,
- vp->text, p
- );
+ printf("%s%s%.*s%s\n", myprefix, sep, len,
+ vp->text, p);
stunalloc(p);
}
}
/*
* Copyright (c) 1999 Herbert Xu <herbert@debian.org>
* This file contains code for the times builtin.
- * $Id: ash.c,v 1.3 2001/06/28 16:43:57 andersen Exp $
+ * $Id: ash.c,v 1.27 2001/10/19 00:08:17 andersen Exp $
*/
static int timescmd (int argc, char **argv)
{
return 0;
}
+#ifdef ASH_MATH_SUPPORT
+/* The let builtin. */
+int letcmd(int argc, char **argv)
+{
+ int errcode;
+ long result=0;
+ if (argc == 2) {
+ char *tmp, *expression, p[13];
+ expression = strchr(argv[1], '=');
+ if (!expression) {
+ /* Cannot use 'error()' here, or the return code
+ * will be incorrect */
+ out2fmt("sh: let: syntax error: \"%s\"\n", argv[1]);
+ return 0;
+ }
+ *expression = '\0';
+ tmp = ++expression;
+ result = arith(tmp, &errcode);
+ if (errcode < 0) {
+ /* Cannot use 'error()' here, or the return code
+ * will be incorrect */
+ out2fmt("sh: let: ");
+ if(errcode == -2)
+ out2fmt("divide by zero");
+ else
+ out2fmt("syntax error: \"%s=%s\"\n", argv[1], expression);
+ return 0;
+ }
+ snprintf(p, 12, "%ld", result);
+ setvar(argv[1], savestr(p), 0);
+ } else if (argc >= 3)
+ synerror("invalid operand");
+ return !result;
+}
+#endif
+
+
/*-
* Copyright (c) 1989, 1991, 1993, 1994
- * The Regents of the University of California. All rights reserved.
+ * The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
- * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
- * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
+ * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
+ * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
*
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
projects / oweals / busybox.git / blobdiff