1 /* vi: set sw=4 ts=4: */
3 * ash shell port for busybox
5 * Copyright (c) 1989, 1991, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
8 * Copyright (c) 1997-2003 Herbert Xu <herbert@debian.org>
9 * was re-ported from NetBSD and debianized.
12 * This code is derived from software contributed to Berkeley by
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 * General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 * Original BSD copyright notice is retained at the end of this file.
33 * rewrite arith.y to micro stack based cryptic algorithm by
34 * Copyright (c) 2001 Aaron Lehmann <aaronl@vitelus.com>
36 * Modified by Paul Mundt <lethal@linux-sh.org> (c) 2004 to support
39 * Modified by Vladimir Oleynik <dzo@simtreas.ru> (c) 2001-2004 to be
40 * used in busybox and size optimizations,
41 * rewrote arith (see notes to this), added locale support,
42 * rewrote dynamic variables.
48 * The follow should be set to reflect the type of system you have:
49 * JOBS -> 1 if you have Berkeley job control, 0 otherwise.
50 * define SYSV if you are running under System V.
51 * define DEBUG=1 to compile in debugging ('set -o debug' to turn on)
52 * define DEBUG=2 to compile in and turn on debugging.
54 * When debugging is on, debugging info will be written to ./trace and
55 * a quit signal will generate a core dump.
68 #include <sys/types.h>
69 #include <sys/cdefs.h>
70 #include <sys/ioctl.h>
71 #include <sys/param.h>
72 #include <sys/resource.h>
102 #ifdef CONFIG_ASH_JOB_CONTROL
116 static int *dash_errno;
118 #define errno (*dash_errno)
121 #if defined(__uClinux__)
122 #error "Do not even bother, ash will not run on uClinux"
126 #define _DIAGASSERT(assert_expr) assert(assert_expr)
128 #define _DIAGASSERT(assert_expr)
132 #ifdef CONFIG_ASH_ALIAS
133 /* $NetBSD: alias.h,v 1.5 2002/11/24 22:35:38 christos Exp $ */
145 static struct alias *lookupalias(const char *, int);
146 static int aliascmd(int, char **);
147 static int unaliascmd(int, char **);
148 static void rmaliases(void);
149 static int unalias(const char *);
150 static void printalias(const struct alias *);
153 /* $NetBSD: cd.h,v 1.3 2002/11/24 22:35:39 christos Exp $ */
156 static void setpwd(const char *, int);
158 /* $NetBSD: error.h,v 1.15 2002/11/24 22:35:39 christos Exp $ */
162 * Types of operations (passed to the errmsg routine).
166 static const char not_found_msg[] = "%s: not found";
169 #define E_OPEN "No such file" /* opening a file */
170 #define E_CREAT "Directory nonexistent" /* creating a file */
171 #define E_EXEC not_found_msg+4 /* executing a program */
174 * We enclose jmp_buf in a structure so that we can declare pointers to
175 * jump locations. The global variable handler contains the location to
176 * jump to when an exception occurs, and the global variable exception
177 * contains a code identifying the exeception. To implement nested
178 * exception handlers, the user should save the value of handler on entry
179 * to an inner scope, set handler to point to a jmploc structure for the
180 * inner scope, and restore handler on exit from the scope.
187 static struct jmploc *handler;
188 static int exception;
189 static volatile int suppressint;
190 static volatile sig_atomic_t intpending;
192 static int exerrno; /* Last exec error, error for EXEXEC */
195 #define EXINT 0 /* SIGINT received */
196 #define EXERROR 1 /* a generic error */
197 #define EXSHELLPROC 2 /* execute a shell procedure */
198 #define EXEXEC 3 /* command execution failed */
199 #define EXEXIT 4 /* exit the shell */
200 #define EXSIG 5 /* trapped signal in wait(1) */
203 /* do we generate EXSIG events */
205 /* last pending signal */
206 static volatile sig_atomic_t pendingsigs;
209 * These macros allow the user to suspend the handling of interrupt signals
210 * over a period of time. This is similar to SIGHOLD to or sigblock, but
211 * much more efficient and portable. (But hacking the kernel is so much
212 * more fun than worrying about efficiency and portability. :-))
215 #define barrier() ({ __asm__ __volatile__ ("": : :"memory"); })
222 #define SAVEINT(v) ((v) = suppressint)
223 #define RESTOREINT(v) \
226 if ((suppressint = (v)) == 0 && intpending) onint(); \
237 /* EXSIG is turned off by evalbltin(). */
240 static void exraise(int) __attribute__((__noreturn__));
241 static void onint(void) __attribute__((__noreturn__));
243 static void error(const char *, ...) __attribute__((__noreturn__));
244 static void exerror(int, const char *, ...) __attribute__((__noreturn__));
246 static void sh_warnx(const char *, ...);
248 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
251 if (--suppressint == 0 && intpending) {
255 #define INTON inton()
256 static void forceinton(void)
262 #define FORCEINTON forceinton()
267 if (--suppressint == 0 && intpending) onint(); \
274 if (intpending) onint(); \
277 #endif /* CONFIG_ASH_OPTIMIZE_FOR_SIZE */
280 * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
281 * so we use _setjmp instead.
284 #if defined(BSD) && !defined(__SVR4) && !defined(__GLIBC__)
285 #define setjmp(jmploc) _setjmp(jmploc)
286 #define longjmp(jmploc, val) _longjmp(jmploc, val)
289 /* $NetBSD: expand.h,v 1.13 2002/11/24 22:35:40 christos Exp $ */
292 struct strlist *next;
298 struct strlist *list;
299 struct strlist **lastp;
305 #define EXP_FULL 0x1 /* perform word splitting & file globbing */
306 #define EXP_TILDE 0x2 /* do normal tilde expansion */
307 #define EXP_VARTILDE 0x4 /* expand tildes in an assignment */
308 #define EXP_REDIR 0x8 /* file glob for a redirection (1 match only) */
309 #define EXP_CASE 0x10 /* keeps quotes around for CASE pattern */
310 #define EXP_RECORD 0x20 /* need to record arguments for ifs breakup */
311 #define EXP_VARTILDE2 0x40 /* expand tildes after colons only */
312 #define EXP_WORD 0x80 /* expand word in parameter expansion */
313 #define EXP_QWORD 0x100 /* expand word in quoted parameter expansion */
317 static void expandarg(union node *, struct arglist *, int);
318 #define rmescapes(p) _rmescapes((p), 0)
319 static char *_rmescapes(char *, int);
320 static int casematch(union node *, char *);
322 #ifdef CONFIG_ASH_MATH_SUPPORT
323 static void expari(int);
326 /* $NetBSD: eval.h,v 1.13 2002/11/24 22:35:39 christos Exp $ */
328 static char *commandname; /* currently executing command */
329 static struct strlist *cmdenviron; /* environment for builtin command */
330 static int exitstatus; /* exit status of last command */
331 static int back_exitstatus; /* exit status of backquoted command */
334 struct backcmd { /* result of evalbackcmd */
335 int fd; /* file descriptor to read from */
336 char *buf; /* buffer */
337 int nleft; /* number of chars in buffer */
338 struct job *jp; /* job structure for command */
342 * This file was generated by the mknodes program.
378 union node *redirect;
385 struct nodelist *cmdlist;
392 union node *redirect;
407 union node *elsepart;
438 struct nodelist *backquote;
478 struct nredir nredir;
479 struct nbinary nbinary;
483 struct nclist nclist;
493 struct nodelist *next;
504 static void freefunc(struct funcnode *);
505 /* $NetBSD: parser.h,v 1.15 2002/11/24 22:35:42 christos Exp $ */
507 /* control characters in argument strings */
508 #define CTL_FIRST '\201' /* first 'special' character */
509 #define CTLESC '\201' /* escape next character */
510 #define CTLVAR '\202' /* variable defn */
511 #define CTLENDVAR '\203'
512 #define CTLBACKQ '\204'
513 #define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */
514 /* CTLBACKQ | CTLQUOTE == '\205' */
515 #define CTLARI '\206' /* arithmetic expression */
516 #define CTLENDARI '\207'
517 #define CTLQUOTEMARK '\210'
518 #define CTL_LAST '\210' /* last 'special' character */
520 /* variable substitution byte (follows CTLVAR) */
521 #define VSTYPE 0x0f /* type of variable substitution */
522 #define VSNUL 0x10 /* colon--treat the empty string as unset */
523 #define VSQUOTE 0x80 /* inside double quotes--suppress splitting */
525 /* values of VSTYPE field */
526 #define VSNORMAL 0x1 /* normal variable: $var or ${var} */
527 #define VSMINUS 0x2 /* ${var-text} */
528 #define VSPLUS 0x3 /* ${var+text} */
529 #define VSQUESTION 0x4 /* ${var?message} */
530 #define VSASSIGN 0x5 /* ${var=text} */
531 #define VSTRIMRIGHT 0x6 /* ${var%pattern} */
532 #define VSTRIMRIGHTMAX 0x7 /* ${var%%pattern} */
533 #define VSTRIMLEFT 0x8 /* ${var#pattern} */
534 #define VSTRIMLEFTMAX 0x9 /* ${var##pattern} */
535 #define VSLENGTH 0xa /* ${#var} */
537 /* values of checkkwd variable */
542 #define IBUFSIZ (BUFSIZ + 1)
545 * NEOF is returned by parsecmd when it encounters an end of file. It
546 * must be distinct from NULL, so we use the address of a variable that
547 * happens to be handy.
549 static int plinno = 1; /* input line number */
551 /* number of characters left in input buffer */
552 static int parsenleft; /* copy of parsefile->nleft */
553 static int parselleft; /* copy of parsefile->lleft */
555 /* next character in input buffer */
556 static char *parsenextc; /* copy of parsefile->nextc */
559 struct strpush *prev; /* preceding string on stack */
562 #ifdef CONFIG_ASH_ALIAS
563 struct alias *ap; /* if push was associated with an alias */
565 char *string; /* remember the string since it may change */
569 struct parsefile *prev; /* preceding file on stack */
570 int linno; /* current line */
571 int fd; /* file descriptor (or -1 if string) */
572 int nleft; /* number of chars left in this line */
573 int lleft; /* number of chars left in this buffer */
574 char *nextc; /* next char in buffer */
575 char *buf; /* input buffer */
576 struct strpush *strpush; /* for pushing strings at this level */
577 struct strpush basestrpush; /* so pushing one is fast */
580 static struct parsefile basepf; /* top level input file */
581 static char basebuf[IBUFSIZ]; /* buffer for top level input file */
582 static struct parsefile *parsefile = &basepf; /* current input file */
585 static int tokpushback; /* last token pushed back */
586 #define NEOF ((union node *)&tokpushback)
587 static int parsebackquote; /* nonzero if we are inside backquotes */
588 static int doprompt; /* if set, prompt the user */
589 static int needprompt; /* true if interactive and at start of line */
590 static int lasttoken; /* last token read */
591 static char *wordtext; /* text of last word returned by readtoken */
593 static struct nodelist *backquotelist;
594 static union node *redirnode;
595 static struct heredoc *heredoc;
596 static int quoteflag; /* set if (part of) last token was quoted */
597 static int startlinno; /* line # where last token started */
599 static union node *parsecmd(int);
600 static void fixredir(union node *, const char *, int);
601 static const char *const *findkwd(const char *);
602 static char *endofname(const char *);
604 /* $NetBSD: shell.h,v 1.16 2003/01/22 20:36:04 dsl Exp $ */
606 typedef void *pointer;
608 static char nullstr[1]; /* zero length string */
609 static const char spcstr[] = " ";
610 static const char snlfmt[] = "%s\n";
611 static const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
612 static const char illnum[] = "Illegal number: %s";
613 static const char homestr[] = "HOME";
616 #define TRACE(param) trace param
617 #define TRACEV(param) tracev param
620 #define TRACEV(param)
623 #if !defined(__GNUC__) || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
624 #define __builtin_expect(x, expected_value) (x)
627 #define likely(x) __builtin_expect((x),1)
642 #define TENDBQUOTE 12
660 /* first char is indicating which tokens mark the end of a list */
661 static const char *const tokname_array[] = {
676 /* the following are keywords */
695 static const char *tokname(int tok)
701 sprintf(buf + (tok >= TSEMI), "%s%c",
702 tokname_array[tok] + 1, (tok >= TSEMI ? '"' : 0));
706 /* $NetBSD: machdep.h,v 1.10 2002/10/07 14:26:08 christos Exp $ */
709 * Most machines require the value returned from malloc to be aligned
710 * in some way. The following macro will get this right on many machines.
713 #define SHELL_SIZE (sizeof(union {int i; char *cp; double d; }) - 1)
715 * It appears that grabstackstr() will barf with such alignments
716 * because stalloc() will return a string allocated in a new stackblock.
718 #define SHELL_ALIGN(nbytes) (((nbytes) + SHELL_SIZE) & ~SHELL_SIZE)
721 * This file was generated by the mksyntax program.
726 #define CWORD 0 /* character is nothing special */
727 #define CNL 1 /* newline character */
728 #define CBACK 2 /* a backslash character */
729 #define CSQUOTE 3 /* single quote */
730 #define CDQUOTE 4 /* double quote */
731 #define CENDQUOTE 5 /* a terminating quote */
732 #define CBQUOTE 6 /* backwards single quote */
733 #define CVAR 7 /* a dollar sign */
734 #define CENDVAR 8 /* a '}' character */
735 #define CLP 9 /* a left paren in arithmetic */
736 #define CRP 10 /* a right paren in arithmetic */
737 #define CENDFILE 11 /* end of file */
738 #define CCTL 12 /* like CWORD, except it must be escaped */
739 #define CSPCL 13 /* these terminate a word */
740 #define CIGN 14 /* character should be ignored */
742 #ifdef CONFIG_ASH_ALIAS
746 #define PEOA_OR_PEOF PEOA
750 #define PEOA_OR_PEOF PEOF
753 #define is_digit(c) ((unsigned)((c) - '0') <= 9)
754 #define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
755 #define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
758 * is_special(c) evaluates to 1 for c in "!#$*-0123456789?@"; 0 otherwise
759 * (assuming ascii char codes, as the original implementation did)
761 #define is_special(c) \
762 ( (((unsigned int)c) - 33 < 32) \
763 && ((0xc1ff920dUL >> (((unsigned int)c) - 33)) & 1))
765 #define digit_val(c) ((c) - '0')
768 * This file was generated by the mksyntax program.
771 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
772 #define USE_SIT_FUNCTION
775 /* number syntax index */
776 #define BASESYNTAX 0 /* not in quotes */
777 #define DQSYNTAX 1 /* in double quotes */
778 #define SQSYNTAX 2 /* in single quotes */
779 #define ARISYNTAX 3 /* in arithmetic */
781 #ifdef CONFIG_ASH_MATH_SUPPORT
782 static const char S_I_T[][4] = {
783 #ifdef CONFIG_ASH_ALIAS
784 {CSPCL, CIGN, CIGN, CIGN}, /* 0, PEOA */
786 {CSPCL, CWORD, CWORD, CWORD}, /* 1, ' ' */
787 {CNL, CNL, CNL, CNL}, /* 2, \n */
788 {CWORD, CCTL, CCTL, CWORD}, /* 3, !*-/:=?[]~ */
789 {CDQUOTE, CENDQUOTE, CWORD, CWORD}, /* 4, '"' */
790 {CVAR, CVAR, CWORD, CVAR}, /* 5, $ */
791 {CSQUOTE, CWORD, CENDQUOTE, CWORD}, /* 6, "'" */
792 {CSPCL, CWORD, CWORD, CLP}, /* 7, ( */
793 {CSPCL, CWORD, CWORD, CRP}, /* 8, ) */
794 {CBACK, CBACK, CCTL, CBACK}, /* 9, \ */
795 {CBQUOTE, CBQUOTE, CWORD, CBQUOTE}, /* 10, ` */
796 {CENDVAR, CENDVAR, CWORD, CENDVAR}, /* 11, } */
797 #ifndef USE_SIT_FUNCTION
798 {CENDFILE, CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
799 {CWORD, CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
800 {CCTL, CCTL, CCTL, CCTL} /* 14, CTLESC ... */
804 static const char S_I_T[][3] = {
805 #ifdef CONFIG_ASH_ALIAS
806 {CSPCL, CIGN, CIGN}, /* 0, PEOA */
808 {CSPCL, CWORD, CWORD}, /* 1, ' ' */
809 {CNL, CNL, CNL}, /* 2, \n */
810 {CWORD, CCTL, CCTL}, /* 3, !*-/:=?[]~ */
811 {CDQUOTE, CENDQUOTE, CWORD}, /* 4, '"' */
812 {CVAR, CVAR, CWORD}, /* 5, $ */
813 {CSQUOTE, CWORD, CENDQUOTE}, /* 6, "'" */
814 {CSPCL, CWORD, CWORD}, /* 7, ( */
815 {CSPCL, CWORD, CWORD}, /* 8, ) */
816 {CBACK, CBACK, CCTL}, /* 9, \ */
817 {CBQUOTE, CBQUOTE, CWORD}, /* 10, ` */
818 {CENDVAR, CENDVAR, CWORD}, /* 11, } */
819 #ifndef USE_SIT_FUNCTION
820 {CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
821 {CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
822 {CCTL, CCTL, CCTL} /* 14, CTLESC ... */
825 #endif /* CONFIG_ASH_MATH_SUPPORT */
827 #ifdef USE_SIT_FUNCTION
829 #define U_C(c) ((unsigned char)(c))
831 static int SIT(int c, int syntax)
833 static const char spec_symbls[] = "\t\n !\"$&'()*-/:;<=>?[\\]`|}~";
834 #ifdef CONFIG_ASH_ALIAS
835 static const char syntax_index_table[] = {
836 1, 2, 1, 3, 4, 5, 1, 6, /* "\t\n !\"$&'" */
837 7, 8, 3, 3, 3, 3, 1, 1, /* "()*-/:;<" */
838 3, 1, 3, 3, 9, 3, 10, 1, /* "=>?[\\]`|" */
842 static const char syntax_index_table[] = {
843 0, 1, 0, 2, 3, 4, 0, 5, /* "\t\n !\"$&'" */
844 6, 7, 2, 2, 2, 2, 0, 0, /* "()*-/:;<" */
845 2, 0, 2, 2, 8, 2, 9, 0, /* "=>?[\\]`|" */
852 if (c == PEOF) /* 2^8+2 */
854 #ifdef CONFIG_ASH_ALIAS
855 if (c == PEOA) /* 2^8+1 */
859 if (U_C(c) >= U_C(CTLESC) && U_C(c) <= U_C(CTLQUOTEMARK))
862 s = strchr(spec_symbls, c);
863 if (s == 0 || *s == 0)
865 indx = syntax_index_table[(s - spec_symbls)];
867 return S_I_T[indx][syntax];
870 #else /* USE_SIT_FUNCTION */
872 #define SIT(c, syntax) S_I_T[(int)syntax_index_table[((int)c)+SYNBASE]][syntax]
874 #ifdef CONFIG_ASH_ALIAS
875 #define CSPCL_CIGN_CIGN_CIGN 0
876 #define CSPCL_CWORD_CWORD_CWORD 1
877 #define CNL_CNL_CNL_CNL 2
878 #define CWORD_CCTL_CCTL_CWORD 3
879 #define CDQUOTE_CENDQUOTE_CWORD_CWORD 4
880 #define CVAR_CVAR_CWORD_CVAR 5
881 #define CSQUOTE_CWORD_CENDQUOTE_CWORD 6
882 #define CSPCL_CWORD_CWORD_CLP 7
883 #define CSPCL_CWORD_CWORD_CRP 8
884 #define CBACK_CBACK_CCTL_CBACK 9
885 #define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 10
886 #define CENDVAR_CENDVAR_CWORD_CENDVAR 11
887 #define CENDFILE_CENDFILE_CENDFILE_CENDFILE 12
888 #define CWORD_CWORD_CWORD_CWORD 13
889 #define CCTL_CCTL_CCTL_CCTL 14
891 #define CSPCL_CWORD_CWORD_CWORD 0
892 #define CNL_CNL_CNL_CNL 1
893 #define CWORD_CCTL_CCTL_CWORD 2
894 #define CDQUOTE_CENDQUOTE_CWORD_CWORD 3
895 #define CVAR_CVAR_CWORD_CVAR 4
896 #define CSQUOTE_CWORD_CENDQUOTE_CWORD 5
897 #define CSPCL_CWORD_CWORD_CLP 6
898 #define CSPCL_CWORD_CWORD_CRP 7
899 #define CBACK_CBACK_CCTL_CBACK 8
900 #define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 9
901 #define CENDVAR_CENDVAR_CWORD_CENDVAR 10
902 #define CENDFILE_CENDFILE_CENDFILE_CENDFILE 11
903 #define CWORD_CWORD_CWORD_CWORD 12
904 #define CCTL_CCTL_CCTL_CCTL 13
907 static const char syntax_index_table[258] = {
908 /* BASESYNTAX_DQSYNTAX_SQSYNTAX_ARISYNTAX */
909 /* 0 PEOF */ CENDFILE_CENDFILE_CENDFILE_CENDFILE,
910 #ifdef CONFIG_ASH_ALIAS
911 /* 1 PEOA */ CSPCL_CIGN_CIGN_CIGN,
913 /* 2 -128 0x80 */ CWORD_CWORD_CWORD_CWORD,
914 /* 3 -127 CTLESC */ CCTL_CCTL_CCTL_CCTL,
915 /* 4 -126 CTLVAR */ CCTL_CCTL_CCTL_CCTL,
916 /* 5 -125 CTLENDVAR */ CCTL_CCTL_CCTL_CCTL,
917 /* 6 -124 CTLBACKQ */ CCTL_CCTL_CCTL_CCTL,
918 /* 7 -123 CTLQUOTE */ CCTL_CCTL_CCTL_CCTL,
919 /* 8 -122 CTLARI */ CCTL_CCTL_CCTL_CCTL,
920 /* 9 -121 CTLENDARI */ CCTL_CCTL_CCTL_CCTL,
921 /* 10 -120 CTLQUOTEMARK */ CCTL_CCTL_CCTL_CCTL,
922 /* 11 -119 */ CWORD_CWORD_CWORD_CWORD,
923 /* 12 -118 */ CWORD_CWORD_CWORD_CWORD,
924 /* 13 -117 */ CWORD_CWORD_CWORD_CWORD,
925 /* 14 -116 */ CWORD_CWORD_CWORD_CWORD,
926 /* 15 -115 */ CWORD_CWORD_CWORD_CWORD,
927 /* 16 -114 */ CWORD_CWORD_CWORD_CWORD,
928 /* 17 -113 */ CWORD_CWORD_CWORD_CWORD,
929 /* 18 -112 */ CWORD_CWORD_CWORD_CWORD,
930 /* 19 -111 */ CWORD_CWORD_CWORD_CWORD,
931 /* 20 -110 */ CWORD_CWORD_CWORD_CWORD,
932 /* 21 -109 */ CWORD_CWORD_CWORD_CWORD,
933 /* 22 -108 */ CWORD_CWORD_CWORD_CWORD,
934 /* 23 -107 */ CWORD_CWORD_CWORD_CWORD,
935 /* 24 -106 */ CWORD_CWORD_CWORD_CWORD,
936 /* 25 -105 */ CWORD_CWORD_CWORD_CWORD,
937 /* 26 -104 */ CWORD_CWORD_CWORD_CWORD,
938 /* 27 -103 */ CWORD_CWORD_CWORD_CWORD,
939 /* 28 -102 */ CWORD_CWORD_CWORD_CWORD,
940 /* 29 -101 */ CWORD_CWORD_CWORD_CWORD,
941 /* 30 -100 */ CWORD_CWORD_CWORD_CWORD,
942 /* 31 -99 */ CWORD_CWORD_CWORD_CWORD,
943 /* 32 -98 */ CWORD_CWORD_CWORD_CWORD,
944 /* 33 -97 */ CWORD_CWORD_CWORD_CWORD,
945 /* 34 -96 */ CWORD_CWORD_CWORD_CWORD,
946 /* 35 -95 */ CWORD_CWORD_CWORD_CWORD,
947 /* 36 -94 */ CWORD_CWORD_CWORD_CWORD,
948 /* 37 -93 */ CWORD_CWORD_CWORD_CWORD,
949 /* 38 -92 */ CWORD_CWORD_CWORD_CWORD,
950 /* 39 -91 */ CWORD_CWORD_CWORD_CWORD,
951 /* 40 -90 */ CWORD_CWORD_CWORD_CWORD,
952 /* 41 -89 */ CWORD_CWORD_CWORD_CWORD,
953 /* 42 -88 */ CWORD_CWORD_CWORD_CWORD,
954 /* 43 -87 */ CWORD_CWORD_CWORD_CWORD,
955 /* 44 -86 */ CWORD_CWORD_CWORD_CWORD,
956 /* 45 -85 */ CWORD_CWORD_CWORD_CWORD,
957 /* 46 -84 */ CWORD_CWORD_CWORD_CWORD,
958 /* 47 -83 */ CWORD_CWORD_CWORD_CWORD,
959 /* 48 -82 */ CWORD_CWORD_CWORD_CWORD,
960 /* 49 -81 */ CWORD_CWORD_CWORD_CWORD,
961 /* 50 -80 */ CWORD_CWORD_CWORD_CWORD,
962 /* 51 -79 */ CWORD_CWORD_CWORD_CWORD,
963 /* 52 -78 */ CWORD_CWORD_CWORD_CWORD,
964 /* 53 -77 */ CWORD_CWORD_CWORD_CWORD,
965 /* 54 -76 */ CWORD_CWORD_CWORD_CWORD,
966 /* 55 -75 */ CWORD_CWORD_CWORD_CWORD,
967 /* 56 -74 */ CWORD_CWORD_CWORD_CWORD,
968 /* 57 -73 */ CWORD_CWORD_CWORD_CWORD,
969 /* 58 -72 */ CWORD_CWORD_CWORD_CWORD,
970 /* 59 -71 */ CWORD_CWORD_CWORD_CWORD,
971 /* 60 -70 */ CWORD_CWORD_CWORD_CWORD,
972 /* 61 -69 */ CWORD_CWORD_CWORD_CWORD,
973 /* 62 -68 */ CWORD_CWORD_CWORD_CWORD,
974 /* 63 -67 */ CWORD_CWORD_CWORD_CWORD,
975 /* 64 -66 */ CWORD_CWORD_CWORD_CWORD,
976 /* 65 -65 */ CWORD_CWORD_CWORD_CWORD,
977 /* 66 -64 */ CWORD_CWORD_CWORD_CWORD,
978 /* 67 -63 */ CWORD_CWORD_CWORD_CWORD,
979 /* 68 -62 */ CWORD_CWORD_CWORD_CWORD,
980 /* 69 -61 */ CWORD_CWORD_CWORD_CWORD,
981 /* 70 -60 */ CWORD_CWORD_CWORD_CWORD,
982 /* 71 -59 */ CWORD_CWORD_CWORD_CWORD,
983 /* 72 -58 */ CWORD_CWORD_CWORD_CWORD,
984 /* 73 -57 */ CWORD_CWORD_CWORD_CWORD,
985 /* 74 -56 */ CWORD_CWORD_CWORD_CWORD,
986 /* 75 -55 */ CWORD_CWORD_CWORD_CWORD,
987 /* 76 -54 */ CWORD_CWORD_CWORD_CWORD,
988 /* 77 -53 */ CWORD_CWORD_CWORD_CWORD,
989 /* 78 -52 */ CWORD_CWORD_CWORD_CWORD,
990 /* 79 -51 */ CWORD_CWORD_CWORD_CWORD,
991 /* 80 -50 */ CWORD_CWORD_CWORD_CWORD,
992 /* 81 -49 */ CWORD_CWORD_CWORD_CWORD,
993 /* 82 -48 */ CWORD_CWORD_CWORD_CWORD,
994 /* 83 -47 */ CWORD_CWORD_CWORD_CWORD,
995 /* 84 -46 */ CWORD_CWORD_CWORD_CWORD,
996 /* 85 -45 */ CWORD_CWORD_CWORD_CWORD,
997 /* 86 -44 */ CWORD_CWORD_CWORD_CWORD,
998 /* 87 -43 */ CWORD_CWORD_CWORD_CWORD,
999 /* 88 -42 */ CWORD_CWORD_CWORD_CWORD,
1000 /* 89 -41 */ CWORD_CWORD_CWORD_CWORD,
1001 /* 90 -40 */ CWORD_CWORD_CWORD_CWORD,
1002 /* 91 -39 */ CWORD_CWORD_CWORD_CWORD,
1003 /* 92 -38 */ CWORD_CWORD_CWORD_CWORD,
1004 /* 93 -37 */ CWORD_CWORD_CWORD_CWORD,
1005 /* 94 -36 */ CWORD_CWORD_CWORD_CWORD,
1006 /* 95 -35 */ CWORD_CWORD_CWORD_CWORD,
1007 /* 96 -34 */ CWORD_CWORD_CWORD_CWORD,
1008 /* 97 -33 */ CWORD_CWORD_CWORD_CWORD,
1009 /* 98 -32 */ CWORD_CWORD_CWORD_CWORD,
1010 /* 99 -31 */ CWORD_CWORD_CWORD_CWORD,
1011 /* 100 -30 */ CWORD_CWORD_CWORD_CWORD,
1012 /* 101 -29 */ CWORD_CWORD_CWORD_CWORD,
1013 /* 102 -28 */ CWORD_CWORD_CWORD_CWORD,
1014 /* 103 -27 */ CWORD_CWORD_CWORD_CWORD,
1015 /* 104 -26 */ CWORD_CWORD_CWORD_CWORD,
1016 /* 105 -25 */ CWORD_CWORD_CWORD_CWORD,
1017 /* 106 -24 */ CWORD_CWORD_CWORD_CWORD,
1018 /* 107 -23 */ CWORD_CWORD_CWORD_CWORD,
1019 /* 108 -22 */ CWORD_CWORD_CWORD_CWORD,
1020 /* 109 -21 */ CWORD_CWORD_CWORD_CWORD,
1021 /* 110 -20 */ CWORD_CWORD_CWORD_CWORD,
1022 /* 111 -19 */ CWORD_CWORD_CWORD_CWORD,
1023 /* 112 -18 */ CWORD_CWORD_CWORD_CWORD,
1024 /* 113 -17 */ CWORD_CWORD_CWORD_CWORD,
1025 /* 114 -16 */ CWORD_CWORD_CWORD_CWORD,
1026 /* 115 -15 */ CWORD_CWORD_CWORD_CWORD,
1027 /* 116 -14 */ CWORD_CWORD_CWORD_CWORD,
1028 /* 117 -13 */ CWORD_CWORD_CWORD_CWORD,
1029 /* 118 -12 */ CWORD_CWORD_CWORD_CWORD,
1030 /* 119 -11 */ CWORD_CWORD_CWORD_CWORD,
1031 /* 120 -10 */ CWORD_CWORD_CWORD_CWORD,
1032 /* 121 -9 */ CWORD_CWORD_CWORD_CWORD,
1033 /* 122 -8 */ CWORD_CWORD_CWORD_CWORD,
1034 /* 123 -7 */ CWORD_CWORD_CWORD_CWORD,
1035 /* 124 -6 */ CWORD_CWORD_CWORD_CWORD,
1036 /* 125 -5 */ CWORD_CWORD_CWORD_CWORD,
1037 /* 126 -4 */ CWORD_CWORD_CWORD_CWORD,
1038 /* 127 -3 */ CWORD_CWORD_CWORD_CWORD,
1039 /* 128 -2 */ CWORD_CWORD_CWORD_CWORD,
1040 /* 129 -1 */ CWORD_CWORD_CWORD_CWORD,
1041 /* 130 0 */ CWORD_CWORD_CWORD_CWORD,
1042 /* 131 1 */ CWORD_CWORD_CWORD_CWORD,
1043 /* 132 2 */ CWORD_CWORD_CWORD_CWORD,
1044 /* 133 3 */ CWORD_CWORD_CWORD_CWORD,
1045 /* 134 4 */ CWORD_CWORD_CWORD_CWORD,
1046 /* 135 5 */ CWORD_CWORD_CWORD_CWORD,
1047 /* 136 6 */ CWORD_CWORD_CWORD_CWORD,
1048 /* 137 7 */ CWORD_CWORD_CWORD_CWORD,
1049 /* 138 8 */ CWORD_CWORD_CWORD_CWORD,
1050 /* 139 9 "\t" */ CSPCL_CWORD_CWORD_CWORD,
1051 /* 140 10 "\n" */ CNL_CNL_CNL_CNL,
1052 /* 141 11 */ CWORD_CWORD_CWORD_CWORD,
1053 /* 142 12 */ CWORD_CWORD_CWORD_CWORD,
1054 /* 143 13 */ CWORD_CWORD_CWORD_CWORD,
1055 /* 144 14 */ CWORD_CWORD_CWORD_CWORD,
1056 /* 145 15 */ CWORD_CWORD_CWORD_CWORD,
1057 /* 146 16 */ CWORD_CWORD_CWORD_CWORD,
1058 /* 147 17 */ CWORD_CWORD_CWORD_CWORD,
1059 /* 148 18 */ CWORD_CWORD_CWORD_CWORD,
1060 /* 149 19 */ CWORD_CWORD_CWORD_CWORD,
1061 /* 150 20 */ CWORD_CWORD_CWORD_CWORD,
1062 /* 151 21 */ CWORD_CWORD_CWORD_CWORD,
1063 /* 152 22 */ CWORD_CWORD_CWORD_CWORD,
1064 /* 153 23 */ CWORD_CWORD_CWORD_CWORD,
1065 /* 154 24 */ CWORD_CWORD_CWORD_CWORD,
1066 /* 155 25 */ CWORD_CWORD_CWORD_CWORD,
1067 /* 156 26 */ CWORD_CWORD_CWORD_CWORD,
1068 /* 157 27 */ CWORD_CWORD_CWORD_CWORD,
1069 /* 158 28 */ CWORD_CWORD_CWORD_CWORD,
1070 /* 159 29 */ CWORD_CWORD_CWORD_CWORD,
1071 /* 160 30 */ CWORD_CWORD_CWORD_CWORD,
1072 /* 161 31 */ CWORD_CWORD_CWORD_CWORD,
1073 /* 162 32 " " */ CSPCL_CWORD_CWORD_CWORD,
1074 /* 163 33 "!" */ CWORD_CCTL_CCTL_CWORD,
1075 /* 164 34 """ */ CDQUOTE_CENDQUOTE_CWORD_CWORD,
1076 /* 165 35 "#" */ CWORD_CWORD_CWORD_CWORD,
1077 /* 166 36 "$" */ CVAR_CVAR_CWORD_CVAR,
1078 /* 167 37 "%" */ CWORD_CWORD_CWORD_CWORD,
1079 /* 168 38 "&" */ CSPCL_CWORD_CWORD_CWORD,
1080 /* 169 39 "'" */ CSQUOTE_CWORD_CENDQUOTE_CWORD,
1081 /* 170 40 "(" */ CSPCL_CWORD_CWORD_CLP,
1082 /* 171 41 ")" */ CSPCL_CWORD_CWORD_CRP,
1083 /* 172 42 "*" */ CWORD_CCTL_CCTL_CWORD,
1084 /* 173 43 "+" */ CWORD_CWORD_CWORD_CWORD,
1085 /* 174 44 "," */ CWORD_CWORD_CWORD_CWORD,
1086 /* 175 45 "-" */ CWORD_CCTL_CCTL_CWORD,
1087 /* 176 46 "." */ CWORD_CWORD_CWORD_CWORD,
1088 /* 177 47 "/" */ CWORD_CCTL_CCTL_CWORD,
1089 /* 178 48 "0" */ CWORD_CWORD_CWORD_CWORD,
1090 /* 179 49 "1" */ CWORD_CWORD_CWORD_CWORD,
1091 /* 180 50 "2" */ CWORD_CWORD_CWORD_CWORD,
1092 /* 181 51 "3" */ CWORD_CWORD_CWORD_CWORD,
1093 /* 182 52 "4" */ CWORD_CWORD_CWORD_CWORD,
1094 /* 183 53 "5" */ CWORD_CWORD_CWORD_CWORD,
1095 /* 184 54 "6" */ CWORD_CWORD_CWORD_CWORD,
1096 /* 185 55 "7" */ CWORD_CWORD_CWORD_CWORD,
1097 /* 186 56 "8" */ CWORD_CWORD_CWORD_CWORD,
1098 /* 187 57 "9" */ CWORD_CWORD_CWORD_CWORD,
1099 /* 188 58 ":" */ CWORD_CCTL_CCTL_CWORD,
1100 /* 189 59 ";" */ CSPCL_CWORD_CWORD_CWORD,
1101 /* 190 60 "<" */ CSPCL_CWORD_CWORD_CWORD,
1102 /* 191 61 "=" */ CWORD_CCTL_CCTL_CWORD,
1103 /* 192 62 ">" */ CSPCL_CWORD_CWORD_CWORD,
1104 /* 193 63 "?" */ CWORD_CCTL_CCTL_CWORD,
1105 /* 194 64 "@" */ CWORD_CWORD_CWORD_CWORD,
1106 /* 195 65 "A" */ CWORD_CWORD_CWORD_CWORD,
1107 /* 196 66 "B" */ CWORD_CWORD_CWORD_CWORD,
1108 /* 197 67 "C" */ CWORD_CWORD_CWORD_CWORD,
1109 /* 198 68 "D" */ CWORD_CWORD_CWORD_CWORD,
1110 /* 199 69 "E" */ CWORD_CWORD_CWORD_CWORD,
1111 /* 200 70 "F" */ CWORD_CWORD_CWORD_CWORD,
1112 /* 201 71 "G" */ CWORD_CWORD_CWORD_CWORD,
1113 /* 202 72 "H" */ CWORD_CWORD_CWORD_CWORD,
1114 /* 203 73 "I" */ CWORD_CWORD_CWORD_CWORD,
1115 /* 204 74 "J" */ CWORD_CWORD_CWORD_CWORD,
1116 /* 205 75 "K" */ CWORD_CWORD_CWORD_CWORD,
1117 /* 206 76 "L" */ CWORD_CWORD_CWORD_CWORD,
1118 /* 207 77 "M" */ CWORD_CWORD_CWORD_CWORD,
1119 /* 208 78 "N" */ CWORD_CWORD_CWORD_CWORD,
1120 /* 209 79 "O" */ CWORD_CWORD_CWORD_CWORD,
1121 /* 210 80 "P" */ CWORD_CWORD_CWORD_CWORD,
1122 /* 211 81 "Q" */ CWORD_CWORD_CWORD_CWORD,
1123 /* 212 82 "R" */ CWORD_CWORD_CWORD_CWORD,
1124 /* 213 83 "S" */ CWORD_CWORD_CWORD_CWORD,
1125 /* 214 84 "T" */ CWORD_CWORD_CWORD_CWORD,
1126 /* 215 85 "U" */ CWORD_CWORD_CWORD_CWORD,
1127 /* 216 86 "V" */ CWORD_CWORD_CWORD_CWORD,
1128 /* 217 87 "W" */ CWORD_CWORD_CWORD_CWORD,
1129 /* 218 88 "X" */ CWORD_CWORD_CWORD_CWORD,
1130 /* 219 89 "Y" */ CWORD_CWORD_CWORD_CWORD,
1131 /* 220 90 "Z" */ CWORD_CWORD_CWORD_CWORD,
1132 /* 221 91 "[" */ CWORD_CCTL_CCTL_CWORD,
1133 /* 222 92 "\" */ CBACK_CBACK_CCTL_CBACK,
1134 /* 223 93 "]" */ CWORD_CCTL_CCTL_CWORD,
1135 /* 224 94 "^" */ CWORD_CWORD_CWORD_CWORD,
1136 /* 225 95 "_" */ CWORD_CWORD_CWORD_CWORD,
1137 /* 226 96 "`" */ CBQUOTE_CBQUOTE_CWORD_CBQUOTE,
1138 /* 227 97 "a" */ CWORD_CWORD_CWORD_CWORD,
1139 /* 228 98 "b" */ CWORD_CWORD_CWORD_CWORD,
1140 /* 229 99 "c" */ CWORD_CWORD_CWORD_CWORD,
1141 /* 230 100 "d" */ CWORD_CWORD_CWORD_CWORD,
1142 /* 231 101 "e" */ CWORD_CWORD_CWORD_CWORD,
1143 /* 232 102 "f" */ CWORD_CWORD_CWORD_CWORD,
1144 /* 233 103 "g" */ CWORD_CWORD_CWORD_CWORD,
1145 /* 234 104 "h" */ CWORD_CWORD_CWORD_CWORD,
1146 /* 235 105 "i" */ CWORD_CWORD_CWORD_CWORD,
1147 /* 236 106 "j" */ CWORD_CWORD_CWORD_CWORD,
1148 /* 237 107 "k" */ CWORD_CWORD_CWORD_CWORD,
1149 /* 238 108 "l" */ CWORD_CWORD_CWORD_CWORD,
1150 /* 239 109 "m" */ CWORD_CWORD_CWORD_CWORD,
1151 /* 240 110 "n" */ CWORD_CWORD_CWORD_CWORD,
1152 /* 241 111 "o" */ CWORD_CWORD_CWORD_CWORD,
1153 /* 242 112 "p" */ CWORD_CWORD_CWORD_CWORD,
1154 /* 243 113 "q" */ CWORD_CWORD_CWORD_CWORD,
1155 /* 244 114 "r" */ CWORD_CWORD_CWORD_CWORD,
1156 /* 245 115 "s" */ CWORD_CWORD_CWORD_CWORD,
1157 /* 246 116 "t" */ CWORD_CWORD_CWORD_CWORD,
1158 /* 247 117 "u" */ CWORD_CWORD_CWORD_CWORD,
1159 /* 248 118 "v" */ CWORD_CWORD_CWORD_CWORD,
1160 /* 249 119 "w" */ CWORD_CWORD_CWORD_CWORD,
1161 /* 250 120 "x" */ CWORD_CWORD_CWORD_CWORD,
1162 /* 251 121 "y" */ CWORD_CWORD_CWORD_CWORD,
1163 /* 252 122 "z" */ CWORD_CWORD_CWORD_CWORD,
1164 /* 253 123 "{" */ CWORD_CWORD_CWORD_CWORD,
1165 /* 254 124 "|" */ CSPCL_CWORD_CWORD_CWORD,
1166 /* 255 125 "}" */ CENDVAR_CENDVAR_CWORD_CENDVAR,
1167 /* 256 126 "~" */ CWORD_CCTL_CCTL_CWORD,
1168 /* 257 127 */ CWORD_CWORD_CWORD_CWORD,
1171 #endif /* USE_SIT_FUNCTION */
1173 /* $NetBSD: alias.c,v 1.11 2002/11/24 22:35:38 christos Exp $ */
1178 static int funcblocksize; /* size of structures in function */
1179 static int funcstringsize; /* size of strings in node */
1180 static pointer funcblock; /* block to allocate function from */
1181 static char *funcstring; /* block to allocate strings from */
1183 static const short nodesize[26] = {
1184 SHELL_ALIGN(sizeof (struct ncmd)),
1185 SHELL_ALIGN(sizeof (struct npipe)),
1186 SHELL_ALIGN(sizeof (struct nredir)),
1187 SHELL_ALIGN(sizeof (struct nredir)),
1188 SHELL_ALIGN(sizeof (struct nredir)),
1189 SHELL_ALIGN(sizeof (struct nbinary)),
1190 SHELL_ALIGN(sizeof (struct nbinary)),
1191 SHELL_ALIGN(sizeof (struct nbinary)),
1192 SHELL_ALIGN(sizeof (struct nif)),
1193 SHELL_ALIGN(sizeof (struct nbinary)),
1194 SHELL_ALIGN(sizeof (struct nbinary)),
1195 SHELL_ALIGN(sizeof (struct nfor)),
1196 SHELL_ALIGN(sizeof (struct ncase)),
1197 SHELL_ALIGN(sizeof (struct nclist)),
1198 SHELL_ALIGN(sizeof (struct narg)),
1199 SHELL_ALIGN(sizeof (struct narg)),
1200 SHELL_ALIGN(sizeof (struct nfile)),
1201 SHELL_ALIGN(sizeof (struct nfile)),
1202 SHELL_ALIGN(sizeof (struct nfile)),
1203 SHELL_ALIGN(sizeof (struct nfile)),
1204 SHELL_ALIGN(sizeof (struct nfile)),
1205 SHELL_ALIGN(sizeof (struct ndup)),
1206 SHELL_ALIGN(sizeof (struct ndup)),
1207 SHELL_ALIGN(sizeof (struct nhere)),
1208 SHELL_ALIGN(sizeof (struct nhere)),
1209 SHELL_ALIGN(sizeof (struct nnot)),
1213 static void calcsize(union node *);
1214 static void sizenodelist(struct nodelist *);
1215 static union node *copynode(union node *);
1216 static struct nodelist *copynodelist(struct nodelist *);
1217 static char *nodesavestr(char *);
1221 static void evalstring(char *);
1222 union node; /* BLETCH for ansi C */
1223 static void evaltree(union node *, int);
1224 static void evalbackcmd(union node *, struct backcmd *);
1226 /* in_function returns nonzero if we are currently evaluating a function */
1227 #define in_function() funcnest
1228 static int evalskip; /* set if we are skipping commands */
1229 static int skipcount; /* number of levels to skip */
1230 static int funcnest; /* depth of function calls */
1232 /* reasons for skipping commands (see comment on breakcmd routine) */
1239 * This file was generated by the mkbuiltins program.
1243 static int bgcmd(int, char **);
1245 static int breakcmd(int, char **);
1246 static int cdcmd(int, char **);
1247 #ifdef CONFIG_ASH_CMDCMD
1248 static int commandcmd(int, char **);
1250 static int dotcmd(int, char **);
1251 static int evalcmd(int, char **);
1252 static int execcmd(int, char **);
1253 static int exitcmd(int, char **);
1254 static int exportcmd(int, char **);
1255 static int falsecmd(int, char **);
1257 static int fgcmd(int, char **);
1259 #ifdef CONFIG_ASH_GETOPTS
1260 static int getoptscmd(int, char **);
1262 static int hashcmd(int, char **);
1263 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
1264 static int helpcmd(int argc, char **argv);
1267 static int jobscmd(int, char **);
1269 #ifdef CONFIG_ASH_MATH_SUPPORT
1270 static int letcmd(int, char **);
1272 static int localcmd(int, char **);
1273 static int pwdcmd(int, char **);
1274 static int readcmd(int, char **);
1275 static int returncmd(int, char **);
1276 static int setcmd(int, char **);
1277 static int shiftcmd(int, char **);
1278 static int timescmd(int, char **);
1279 static int trapcmd(int, char **);
1280 static int truecmd(int, char **);
1281 static int typecmd(int, char **);
1282 static int umaskcmd(int, char **);
1283 static int unsetcmd(int, char **);
1284 static int waitcmd(int, char **);
1285 static int ulimitcmd(int, char **);
1287 static int killcmd(int, char **);
1290 /* $NetBSD: mail.h,v 1.9 2002/11/24 22:35:40 christos Exp $ */
1292 #ifdef CONFIG_ASH_MAIL
1293 static void chkmail(void);
1294 static void changemail(const char *);
1297 /* $NetBSD: exec.h,v 1.20 2003/01/22 20:36:04 dsl Exp $ */
1299 /* values of cmdtype */
1300 #define CMDUNKNOWN -1 /* no entry in table for command */
1301 #define CMDNORMAL 0 /* command is an executable program */
1302 #define CMDFUNCTION 1 /* command is a shell function */
1303 #define CMDBUILTIN 2 /* command is a shell builtin */
1307 int (*builtin)(int, char **);
1308 /* unsigned flags; */
1311 #ifdef CONFIG_ASH_CMDCMD
1313 # ifdef CONFIG_ASH_ALIAS
1314 # define COMMANDCMD (builtincmd + 7)
1315 # define EXECCMD (builtincmd + 10)
1317 # define COMMANDCMD (builtincmd + 6)
1318 # define EXECCMD (builtincmd + 9)
1321 # ifdef CONFIG_ASH_ALIAS
1322 # define COMMANDCMD (builtincmd + 6)
1323 # define EXECCMD (builtincmd + 9)
1325 # define COMMANDCMD (builtincmd + 5)
1326 # define EXECCMD (builtincmd + 8)
1329 #else /* ! CONFIG_ASH_CMDCMD */
1331 # ifdef CONFIG_ASH_ALIAS
1332 # define EXECCMD (builtincmd + 9)
1334 # define EXECCMD (builtincmd + 8)
1337 # ifdef CONFIG_ASH_ALIAS
1338 # define EXECCMD (builtincmd + 8)
1340 # define EXECCMD (builtincmd + 7)
1343 #endif /* CONFIG_ASH_CMDCMD */
1345 #define BUILTIN_NOSPEC "0"
1346 #define BUILTIN_SPECIAL "1"
1347 #define BUILTIN_REGULAR "2"
1348 #define BUILTIN_SPEC_REG "3"
1349 #define BUILTIN_ASSIGN "4"
1350 #define BUILTIN_SPEC_ASSG "5"
1351 #define BUILTIN_REG_ASSG "6"
1352 #define BUILTIN_SPEC_REG_ASSG "7"
1354 #define IS_BUILTIN_SPECIAL(builtincmd) ((builtincmd)->name[0] & 1)
1355 #define IS_BUILTIN_REGULAR(builtincmd) ((builtincmd)->name[0] & 2)
1357 static const struct builtincmd builtincmd[] = {
1358 { BUILTIN_SPEC_REG ".", dotcmd },
1359 { BUILTIN_SPEC_REG ":", truecmd },
1360 #ifdef CONFIG_ASH_ALIAS
1361 { BUILTIN_REG_ASSG "alias", aliascmd },
1364 { BUILTIN_REGULAR "bg", bgcmd },
1366 { BUILTIN_SPEC_REG "break", breakcmd },
1367 { BUILTIN_REGULAR "cd", cdcmd },
1368 { BUILTIN_NOSPEC "chdir", cdcmd },
1369 #ifdef CONFIG_ASH_CMDCMD
1370 { BUILTIN_REGULAR "command", commandcmd },
1372 { BUILTIN_SPEC_REG "continue", breakcmd },
1373 { BUILTIN_SPEC_REG "eval", evalcmd },
1374 { BUILTIN_SPEC_REG "exec", execcmd },
1375 { BUILTIN_SPEC_REG "exit", exitcmd },
1376 { BUILTIN_SPEC_REG_ASSG "export", exportcmd },
1377 { BUILTIN_REGULAR "false", falsecmd },
1379 { BUILTIN_REGULAR "fg", fgcmd },
1381 #ifdef CONFIG_ASH_GETOPTS
1382 { BUILTIN_REGULAR "getopts", getoptscmd },
1384 { BUILTIN_NOSPEC "hash", hashcmd },
1385 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
1386 { BUILTIN_NOSPEC "help", helpcmd },
1389 { BUILTIN_REGULAR "jobs", jobscmd },
1390 { BUILTIN_REGULAR "kill", killcmd },
1392 #ifdef CONFIG_ASH_MATH_SUPPORT
1393 { BUILTIN_NOSPEC "let", letcmd },
1395 { BUILTIN_ASSIGN "local", localcmd },
1396 { BUILTIN_NOSPEC "pwd", pwdcmd },
1397 { BUILTIN_REGULAR "read", readcmd },
1398 { BUILTIN_SPEC_REG_ASSG "readonly", exportcmd },
1399 { BUILTIN_SPEC_REG "return", returncmd },
1400 { BUILTIN_SPEC_REG "set", setcmd },
1401 { BUILTIN_SPEC_REG "shift", shiftcmd },
1402 { BUILTIN_SPEC_REG "times", timescmd },
1403 { BUILTIN_SPEC_REG "trap", trapcmd },
1404 { BUILTIN_REGULAR "true", truecmd },
1405 { BUILTIN_NOSPEC "type", typecmd },
1406 { BUILTIN_NOSPEC "ulimit", ulimitcmd },
1407 { BUILTIN_REGULAR "umask", umaskcmd },
1408 #ifdef CONFIG_ASH_ALIAS
1409 { BUILTIN_REGULAR "unalias", unaliascmd },
1411 { BUILTIN_SPEC_REG "unset", unsetcmd },
1412 { BUILTIN_REGULAR "wait", waitcmd },
1415 #define NUMBUILTINS (sizeof (builtincmd) / sizeof (struct builtincmd) )
1423 const struct builtincmd *cmd;
1424 struct funcnode *func;
1429 /* action to find_command() */
1430 #define DO_ERR 0x01 /* prints errors */
1431 #define DO_ABS 0x02 /* checks absolute paths */
1432 #define DO_NOFUNC 0x04 /* don't return shell functions, for command */
1433 #define DO_ALTPATH 0x08 /* using alternate path */
1434 #define DO_ALTBLTIN 0x20 /* %builtin in alt. path */
1436 static const char *pathopt; /* set by padvance */
1438 static void shellexec(char **, const char *, int)
1439 __attribute__((__noreturn__));
1440 static char *padvance(const char **, const char *);
1441 static void find_command(char *, struct cmdentry *, int, const char *);
1442 static struct builtincmd *find_builtin(const char *);
1443 static void hashcd(void);
1444 static void changepath(const char *);
1445 static void defun(char *, union node *);
1446 static void unsetfunc(const char *);
1448 #ifdef CONFIG_ASH_MATH_SUPPORT
1449 static long dash_arith(const char *);
1452 #ifdef CONFIG_ASH_RANDOM_SUPPORT
1453 static unsigned long rseed;
1454 static void change_random(const char *);
1455 # ifndef DYNAMIC_VAR
1456 # define DYNAMIC_VAR
1460 /* $NetBSD: init.h,v 1.9 2002/11/24 22:35:40 christos Exp $ */
1462 static void reset(void);
1464 /* $NetBSD: var.h,v 1.21 2003/01/22 20:36:04 dsl Exp $ */
1471 #define VEXPORT 0x01 /* variable is exported */
1472 #define VREADONLY 0x02 /* variable cannot be modified */
1473 #define VSTRFIXED 0x04 /* variable struct is statically allocated */
1474 #define VTEXTFIXED 0x08 /* text is statically allocated */
1475 #define VSTACK 0x10 /* text is allocated on the stack */
1476 #define VUNSET 0x20 /* the variable is not set */
1477 #define VNOFUNC 0x40 /* don't call the callback function */
1478 #define VNOSET 0x80 /* do not set variable - just readonly test */
1479 #define VNOSAVE 0x100 /* when text is on the heap before setvareq */
1481 # define VDYNAMIC 0x200 /* dynamic variable */
1487 struct var *next; /* next entry in hash list */
1488 int flags; /* flags are defined above */
1489 const char *text; /* name=value */
1490 void (*func)(const char *); /* function to be called when */
1491 /* the variable gets set/unset */
1495 struct localvar *next; /* next local variable in list */
1496 struct var *vp; /* the variable that was made local */
1497 int flags; /* saved flags */
1498 const char *text; /* saved text */
1502 static struct localvar *localvars;
1508 #ifdef CONFIG_ASH_GETOPTS
1509 static void getoptsreset(const char *);
1512 #ifdef CONFIG_LOCALE_SUPPORT
1514 static void change_lc_all(const char *value);
1515 static void change_lc_ctype(const char *value);
1521 static const char defpathvar[] = "PATH=/usr/local/bin:/usr/bin:/sbin:/bin";
1523 static const char defifsvar[] = "IFS= \t\n";
1524 #define defifs (defifsvar + 4)
1526 static const char defifs[] = " \t\n";
1530 static struct var varinit[] = {
1532 { 0, VSTRFIXED|VTEXTFIXED, defifsvar, 0 },
1534 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "IFS\0", 0 },
1537 #ifdef CONFIG_ASH_MAIL
1538 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "MAIL\0", changemail },
1539 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "MAILPATH\0", changemail },
1542 { 0, VSTRFIXED|VTEXTFIXED, defpathvar, changepath },
1543 { 0, VSTRFIXED|VTEXTFIXED, "PS1=$ ", 0 },
1544 { 0, VSTRFIXED|VTEXTFIXED, "PS2=> ", 0 },
1545 { 0, VSTRFIXED|VTEXTFIXED, "PS4=+ ", 0 },
1546 #ifdef CONFIG_ASH_GETOPTS
1547 { 0, VSTRFIXED|VTEXTFIXED, "OPTIND=1", getoptsreset },
1549 #ifdef CONFIG_ASH_RANDOM_SUPPORT
1550 {0, VSTRFIXED|VTEXTFIXED|VUNSET|VDYNAMIC, "RANDOM\0", change_random },
1552 #ifdef CONFIG_LOCALE_SUPPORT
1553 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "LC_ALL\0", change_lc_all },
1554 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "LC_CTYPE\0", change_lc_ctype },
1556 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
1557 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "HISTFILE\0", NULL },
1561 #define vifs varinit[0]
1562 #ifdef CONFIG_ASH_MAIL
1563 #define vmail (&vifs)[1]
1564 #define vmpath (&vmail)[1]
1568 #define vpath (&vmpath)[1]
1569 #define vps1 (&vpath)[1]
1570 #define vps2 (&vps1)[1]
1571 #define vps4 (&vps2)[1]
1572 #define voptind (&vps4)[1]
1573 #ifdef CONFIG_ASH_GETOPTS
1574 #define vrandom (&voptind)[1]
1576 #define vrandom (&vps4)[1]
1578 #define defpath (defpathvar + 5)
1581 * The following macros access the values of the above variables.
1582 * They have to skip over the name. They return the null string
1583 * for unset variables.
1586 #define ifsval() (vifs.text + 4)
1587 #define ifsset() ((vifs.flags & VUNSET) == 0)
1588 #define mailval() (vmail.text + 5)
1589 #define mpathval() (vmpath.text + 9)
1590 #define pathval() (vpath.text + 5)
1591 #define ps1val() (vps1.text + 4)
1592 #define ps2val() (vps2.text + 4)
1593 #define ps4val() (vps4.text + 4)
1594 #define optindval() (voptind.text + 7)
1596 #define mpathset() ((vmpath.flags & VUNSET) == 0)
1598 static void setvar(const char *, const char *, int);
1599 static void setvareq(char *, int);
1600 static void listsetvar(struct strlist *, int);
1601 static char *lookupvar(const char *);
1602 static char *bltinlookup(const char *);
1603 static char **listvars(int, int, char ***);
1604 #define environment() listvars(VEXPORT, VUNSET, 0)
1605 static int showvars(const char *, int, int);
1606 static void poplocalvars(void);
1607 static int unsetvar(const char *);
1608 #ifdef CONFIG_ASH_GETOPTS
1609 static int setvarsafe(const char *, const char *, int);
1611 static int varcmp(const char *, const char *);
1612 static struct var **hashvar(const char *);
1615 static inline int varequal(const char *a, const char *b) {
1616 return !varcmp(a, b);
1620 static int loopnest; /* current loop nesting level */
1623 * The parsefile structure pointed to by the global variable parsefile
1624 * contains information about the current file being read.
1629 struct redirtab *next;
1634 static struct redirtab *redirlist;
1635 static int nullredirs;
1637 extern char **environ;
1639 /* $NetBSD: output.h,v 1.16 2002/11/24 22:35:42 christos Exp $ */
1642 static void outstr(const char *, FILE *);
1643 static void outcslow(int, FILE *);
1644 static void flushall(void);
1645 static void flusherr(void);
1646 static int out1fmt(const char *, ...)
1647 __attribute__((__format__(__printf__,1,2)));
1648 static int fmtstr(char *, size_t, const char *, ...)
1649 __attribute__((__format__(__printf__,3,4)));
1651 static int preverrout_fd; /* save fd2 before print debug if xflag is set. */
1654 static void out1str(const char *p)
1659 static void out2str(const char *p)
1666 * Initialization code.
1670 * This routine initializes the builtin variables.
1681 * PS1 depends on uid
1683 #if defined(CONFIG_FEATURE_COMMAND_EDITING) && defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1684 vps1.text = "PS1=\\w \\$ ";
1687 vps1.text = "PS1=# ";
1690 end = vp + sizeof(varinit) / sizeof(varinit[0]);
1692 vpp = hashvar(vp->text);
1695 } while (++vp < end);
1704 basepf.nextc = basepf.buf = basebuf;
1709 signal(SIGCHLD, SIG_DFL);
1718 for (envp = environ ; *envp ; envp++) {
1719 if (strchr(*envp, '=')) {
1720 setvareq(*envp, VEXPORT|VTEXTFIXED);
1724 snprintf(ppid, sizeof(ppid), "%d", (int) getppid());
1725 setvar("PPID", ppid, 0);
1730 /* PEOF (the end of file marker) */
1733 * The input line number. Input.c just defines this variable, and saves
1734 * and restores it when files are pushed and popped. The user of this
1735 * package must set its value.
1738 static int pgetc(void);
1739 static int pgetc2(void);
1740 static int preadbuffer(void);
1741 static void pungetc(void);
1742 static void pushstring(char *, void *);
1743 static void popstring(void);
1744 static void setinputfile(const char *, int);
1745 static void setinputfd(int, int);
1746 static void setinputstring(char *);
1747 static void popfile(void);
1748 static void popallfiles(void);
1749 static void closescript(void);
1752 /* $NetBSD: jobs.h,v 1.17 2003/01/22 20:36:04 dsl Exp $ */
1755 /* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
1758 #define FORK_NOJOB 2
1760 /* mode flags for showjob(s) */
1761 #define SHOW_PGID 0x01 /* only show pgid - for jobs -p */
1762 #define SHOW_PID 0x04 /* include process pid */
1763 #define SHOW_CHANGED 0x08 /* only jobs whose state has changed */
1767 * A job structure contains information about a job. A job is either a
1768 * single process or a set of processes contained in a pipeline. In the
1769 * latter case, pidlist will be non-NULL, and will point to a -1 terminated
1774 pid_t pid; /* process id */
1775 int status; /* last process status from wait() */
1776 char *cmd; /* text of command being run */
1780 struct procstat ps0; /* status of process */
1781 struct procstat *ps; /* status or processes when more than one */
1783 int stopstatus; /* status of a stopped job */
1786 nprocs: 16, /* number of processes */
1788 #define JOBRUNNING 0 /* at least one proc running */
1789 #define JOBSTOPPED 1 /* all procs are stopped */
1790 #define JOBDONE 2 /* all procs are completed */
1792 sigint: 1, /* job was killed by SIGINT */
1793 jobctl: 1, /* job running under job control */
1795 waited: 1, /* true if this entry has been waited for */
1796 used: 1, /* true if this entry is in used */
1797 changed: 1; /* true if status has changed */
1798 struct job *prev_job; /* previous job */
1801 static pid_t backgndpid; /* pid of last background process */
1802 static int job_warning; /* user was warned about stopped jobs */
1804 static int jobctl; /* true if doing job control */
1807 static struct job *makejob(union node *, int);
1808 static int forkshell(struct job *, union node *, int);
1809 static int waitforjob(struct job *);
1810 static int stoppedjobs(void);
1813 #define setjobctl(on) /* do nothing */
1815 static void setjobctl(int);
1816 static void showjobs(FILE *, int);
1819 /* $NetBSD: main.h,v 1.9 2002/11/24 22:35:41 christos Exp $ */
1822 /* pid of main shell */
1824 /* true if we aren't a child of the main shell */
1825 static int rootshell;
1827 static void readcmdfile(char *);
1828 static void cmdloop(int);
1830 /* $NetBSD: memalloc.h,v 1.13 2003/01/22 20:36:04 dsl Exp $ */
1834 struct stack_block *stackp;
1837 struct stackmark *marknext;
1840 /* minimum size of a block */
1841 #define MINSIZE SHELL_ALIGN(504)
1843 struct stack_block {
1844 struct stack_block *prev;
1845 char space[MINSIZE];
1848 static struct stack_block stackbase;
1849 static struct stack_block *stackp = &stackbase;
1850 static struct stackmark *markp;
1851 static char *stacknxt = stackbase.space;
1852 static size_t stacknleft = MINSIZE;
1853 static char *sstrend = stackbase.space + MINSIZE;
1854 static int herefd = -1;
1857 static pointer ckmalloc(size_t);
1858 static pointer ckrealloc(pointer, size_t);
1859 static char *savestr(const char *);
1860 static pointer stalloc(size_t);
1861 static void stunalloc(pointer);
1862 static void setstackmark(struct stackmark *);
1863 static void popstackmark(struct stackmark *);
1864 static void growstackblock(void);
1865 static void *growstackstr(void);
1866 static char *makestrspace(size_t, char *);
1867 static char *stnputs(const char *, size_t, char *);
1868 static char *stputs(const char *, char *);
1871 static inline char *_STPUTC(char c, char *p) {
1878 #define stackblock() ((void *)stacknxt)
1879 #define stackblocksize() stacknleft
1880 #define STARTSTACKSTR(p) ((p) = stackblock())
1881 #define STPUTC(c, p) ((p) = _STPUTC((c), (p)))
1882 #define CHECKSTRSPACE(n, p) \
1886 size_t m = sstrend - q; \
1888 (p) = makestrspace(l, q); \
1891 #define USTPUTC(c, p) (*p++ = (c))
1892 #define STACKSTRNUL(p) ((p) == sstrend? (p = growstackstr(), *p = '\0') : (*p = '\0'))
1893 #define STUNPUTC(p) (--p)
1894 #define STTOPC(p) p[-1]
1895 #define STADJUST(amount, p) (p += (amount))
1897 #define grabstackstr(p) stalloc((char *)(p) - (char *)stackblock())
1898 #define ungrabstackstr(s, p) stunalloc((s))
1899 #define stackstrend() ((void *)sstrend)
1901 #define ckfree(p) free((pointer)(p))
1903 /* $NetBSD: mystring.h,v 1.10 2002/11/24 22:35:42 christos Exp $ */
1906 #define DOLATSTRLEN 4
1908 static char *prefix(const char *, const char *);
1909 static int number(const char *);
1910 static int is_number(const char *);
1911 static char *single_quote(const char *);
1912 static char *sstrdup(const char *);
1914 #define equal(s1, s2) (strcmp(s1, s2) == 0)
1915 #define scopy(s1, s2) ((void)strcpy(s2, s1))
1917 /* $NetBSD: options.h,v 1.16 2003/01/22 20:36:04 dsl Exp $ */
1920 int nparam; /* # of positional parameters (without $0) */
1921 unsigned char malloc; /* if parameter list dynamically allocated */
1922 char **p; /* parameter list */
1923 #ifdef CONFIG_ASH_GETOPTS
1924 int optind; /* next parameter to be processed by getopts */
1925 int optoff; /* used by getopts */
1930 #define eflag optlist[0]
1931 #define fflag optlist[1]
1932 #define Iflag optlist[2]
1933 #define iflag optlist[3]
1934 #define mflag optlist[4]
1935 #define nflag optlist[5]
1936 #define sflag optlist[6]
1937 #define xflag optlist[7]
1938 #define vflag optlist[8]
1939 #define Cflag optlist[9]
1940 #define aflag optlist[10]
1941 #define bflag optlist[11]
1942 #define uflag optlist[12]
1943 #define qflag optlist[13]
1946 #define nolog optlist[14]
1947 #define debug optlist[15]
1953 /* $NetBSD: options.c,v 1.33 2003/01/22 20:36:04 dsl Exp $ */
1956 static const char *const optletters_optnames[NOPTS] = {
1977 #define optletters(n) optletters_optnames[(n)][0]
1978 #define optnames(n) (&optletters_optnames[(n)][1])
1981 static char optlist[NOPTS];
1984 static char *arg0; /* value of $0 */
1985 static struct shparam shellparam; /* $@ current positional parameters */
1986 static char **argptr; /* argument list for builtin commands */
1987 static char *optionarg; /* set by nextopt (like getopt) */
1988 static char *optptr; /* used by nextopt */
1990 static char *minusc; /* argument to -c option */
1993 static void procargs(int, char **);
1994 static void optschanged(void);
1995 static void setparam(char **);
1996 static void freeparam(volatile struct shparam *);
1997 static int shiftcmd(int, char **);
1998 static int setcmd(int, char **);
1999 static int nextopt(const char *);
2001 /* $NetBSD: redir.h,v 1.14 2002/11/24 22:35:43 christos Exp $ */
2003 /* flags passed to redirect */
2004 #define REDIR_PUSH 01 /* save previous values of file descriptors */
2005 #define REDIR_SAVEFD2 03 /* set preverrout */
2008 static void redirect(union node *, int);
2009 static void popredir(int);
2010 static void clearredir(int);
2011 static int copyfd(int, int);
2012 static int redirectsafe(union node *, int);
2014 /* $NetBSD: show.h,v 1.6 2003/01/22 20:36:04 dsl Exp $ */
2018 static void showtree(union node *);
2019 static void trace(const char *, ...);
2020 static void tracev(const char *, va_list);
2021 static void trargs(char **);
2022 static void trputc(int);
2023 static void trputs(const char *);
2024 static void opentrace(void);
2027 /* $NetBSD: trap.h,v 1.16 2002/11/24 22:35:43 christos Exp $ */
2030 /* trap handler commands */
2031 static char *trap[NSIG];
2032 /* current value of signal */
2033 static char sigmode[NSIG - 1];
2034 /* indicates specified signal received */
2035 static char gotsig[NSIG - 1];
2037 static void clear_traps(void);
2038 static void setsignal(int);
2039 static void ignoresig(int);
2040 static void onsig(int);
2041 static void dotrap(void);
2042 static void setinteractive(int);
2043 static void exitshell(void) __attribute__((__noreturn__));
2044 static int decode_signal(const char *, int);
2047 * This routine is called when an error or an interrupt occurs in an
2048 * interactive shell and control is returned to the main command loop.
2063 parselleft = parsenleft = 0; /* clear input buffer */
2067 /* from parser.c: */
2080 #ifdef CONFIG_ASH_ALIAS
2081 static struct alias *atab[ATABSIZE];
2083 static void setalias(const char *, const char *);
2084 static struct alias *freealias(struct alias *);
2085 static struct alias **__lookupalias(const char *);
2088 setalias(const char *name, const char *val)
2090 struct alias *ap, **app;
2092 app = __lookupalias(name);
2096 if (!(ap->flag & ALIASINUSE)) {
2099 ap->val = savestr(val);
2100 ap->flag &= ~ALIASDEAD;
2103 ap = ckmalloc(sizeof (struct alias));
2104 ap->name = savestr(name);
2105 ap->val = savestr(val);
2114 unalias(const char *name)
2118 app = __lookupalias(name);
2122 *app = freealias(*app);
2133 struct alias *ap, **app;
2137 for (i = 0; i < ATABSIZE; i++) {
2139 for (ap = *app; ap; ap = *app) {
2140 *app = freealias(*app);
2149 static struct alias *
2150 lookupalias(const char *name, int check)
2152 struct alias *ap = *__lookupalias(name);
2154 if (check && ap && (ap->flag & ALIASINUSE))
2160 * TODO - sort output
2163 aliascmd(int argc, char **argv)
2172 for (i = 0; i < ATABSIZE; i++)
2173 for (ap = atab[i]; ap; ap = ap->next) {
2178 while ((n = *++argv) != NULL) {
2179 if ((v = strchr(n+1, '=')) == NULL) { /* n+1: funny ksh stuff */
2180 if ((ap = *__lookupalias(n)) == NULL) {
2181 fprintf(stderr, "%s: %s not found\n", "alias", n);
2195 unaliascmd(int argc, char **argv)
2199 while ((i = nextopt("a")) != '\0') {
2205 for (i = 0; *argptr; argptr++) {
2206 if (unalias(*argptr)) {
2207 fprintf(stderr, "%s: %s not found\n", "unalias", *argptr);
2215 static struct alias *
2216 freealias(struct alias *ap) {
2219 if (ap->flag & ALIASINUSE) {
2220 ap->flag |= ALIASDEAD;
2232 printalias(const struct alias *ap) {
2233 out1fmt("%s=%s\n", ap->name, single_quote(ap->val));
2236 static struct alias **
2237 __lookupalias(const char *name) {
2238 unsigned int hashval;
2245 ch = (unsigned char)*p;
2249 ch = (unsigned char)*++p;
2251 app = &atab[hashval % ATABSIZE];
2253 for (; *app; app = &(*app)->next) {
2254 if (equal(name, (*app)->name)) {
2261 #endif /* CONFIG_ASH_ALIAS */
2264 /* $NetBSD: cd.c,v 1.30 2003/01/22 20:36:03 dsl Exp $ */
2267 * The cd and pwd commands.
2270 #define CD_PHYSICAL 1
2273 static int docd(const char *, int);
2274 static int cdopt(void);
2276 static char *curdir = nullstr; /* current working directory */
2277 static char *physdir = nullstr; /* physical working directory */
2286 while ((i = nextopt("LP"))) {
2288 flags ^= CD_PHYSICAL;
2297 cdcmd(int argc, char **argv)
2309 dest = bltinlookup(homestr);
2310 else if (dest[0] == '-' && dest[1] == '\0') {
2311 dest = bltinlookup("OLDPWD");
2334 if (!(path = bltinlookup("CDPATH"))) {
2342 p = padvance(&path, dest);
2343 if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
2347 if (!docd(p, flags))
2352 error("can't cd to %s", dest);
2355 if (flags & CD_PRINT)
2356 out1fmt(snlfmt, curdir);
2362 * Update curdir (the name of the current directory) in response to a
2366 static inline const char *
2367 updatepwd(const char *dir)
2374 cdcomppath = sstrdup(dir);
2377 if (curdir == nullstr)
2379 new = stputs(curdir, new);
2381 new = makestrspace(strlen(dir) + 2, new);
2382 lim = stackblock() + 1;
2386 if (new > lim && *lim == '/')
2391 if (dir[1] == '/' && dir[2] != '/') {
2397 p = strtok(cdcomppath, "/");
2401 if (p[1] == '.' && p[2] == '\0') {
2408 } else if (p[1] == '\0')
2412 new = stputs(p, new);
2420 return stackblock();
2424 * Actually do the chdir. We also call hashcd to let the routines in exec.c
2425 * know that the current directory has changed.
2429 docd(const char *dest, int flags)
2431 const char *dir = 0;
2434 TRACE(("docd(\"%s\", %d) called\n", dest, flags));
2437 if (!(flags & CD_PHYSICAL)) {
2438 dir = updatepwd(dest);
2453 * Find out what the current directory is. If we already know the current
2454 * directory, this routine returns immediately.
2456 static inline char *
2459 char *dir = getcwd(0, 0);
2460 return dir ? dir : nullstr;
2464 pwdcmd(int argc, char **argv)
2467 const char *dir = curdir;
2471 if (physdir == nullstr)
2475 out1fmt(snlfmt, dir);
2480 setpwd(const char *val, int setold)
2484 oldcur = dir = curdir;
2487 setvar("OLDPWD", oldcur, VEXPORT);
2490 if (physdir != nullstr) {
2491 if (physdir != oldcur)
2495 if (oldcur == val || !val) {
2502 if (oldcur != dir && oldcur != nullstr) {
2507 setvar("PWD", dir, VEXPORT);
2510 /* $NetBSD: error.c,v 1.30 2003/01/22 20:36:03 dsl Exp $ */
2513 * Errors and exceptions.
2517 * Code to handle exceptions in C.
2522 static void exverror(int, const char *, va_list)
2523 __attribute__((__noreturn__));
2526 * Called to raise an exception. Since C doesn't include exceptions, we
2527 * just do a longjmp to the exception handler. The type of exception is
2528 * stored in the global variable "exception".
2535 if (handler == NULL)
2541 longjmp(handler->loc, 1);
2546 * Called from trap.c when a SIGINT is received. (If the user specifies
2547 * that SIGINT is to be trapped or ignored using the trap builtin, then
2548 * this routine is not called.) Suppressint is nonzero when interrupts
2549 * are held using the INTOFF macro. (The test for iflag is just
2550 * defensive programming.)
2560 if (gotsig[SIGINT - 1] && !trap[SIGINT]) {
2561 if (!(rootshell && iflag)) {
2562 signal(SIGINT, SIG_DFL);
2572 exvwarning(const char *msg, va_list ap)
2585 fprintf(errs, fmt, name, startlinno);
2586 vfprintf(errs, msg, ap);
2587 outcslow('\n', errs);
2591 * Exverror is called to raise the error exception. If the second argument
2592 * is not NULL then error prints an error message using printf style
2593 * formatting. It then raises the error exception.
2596 exverror(int cond, const char *msg, va_list ap)
2600 TRACE(("exverror(%d, \"", cond));
2602 TRACE(("\") pid=%d\n", getpid()));
2604 TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
2607 exvwarning(msg, ap);
2616 error(const char *msg, ...)
2621 exverror(EXERROR, msg, ap);
2628 exerror(int cond, const char *msg, ...)
2633 exverror(cond, msg, ap);
2639 * error/warning routines for external builtins
2643 sh_warnx(const char *fmt, ...)
2648 exvwarning(fmt, ap);
2654 * Return a string describing an error. The returned string may be a
2655 * pointer to a static buffer that will be overwritten on the next call.
2656 * Action describes the operation that got the error.
2660 errmsg(int e, const char *em)
2662 if(e == ENOENT || e == ENOTDIR) {
2670 /* $NetBSD: eval.c,v 1.71 2003/01/23 03:33:16 rafal Exp $ */
2673 * Evaluate a command.
2676 /* flags in argument to evaltree */
2677 #define EV_EXIT 01 /* exit after evaluating tree */
2678 #define EV_TESTED 02 /* exit status is checked; ignore -e flag */
2679 #define EV_BACKCMD 04 /* command executing within back quotes */
2682 static void evalloop(union node *, int);
2683 static void evalfor(union node *, int);
2684 static void evalcase(union node *, int);
2685 static void evalsubshell(union node *, int);
2686 static void expredir(union node *);
2687 static void evalpipe(union node *, int);
2688 static void evalcommand(union node *, int);
2689 static int evalbltin(const struct builtincmd *, int, char **);
2690 static int evalfun(struct funcnode *, int, char **, int);
2691 static void prehash(union node *);
2692 static int bltincmd(int, char **);
2695 static const struct builtincmd bltin = {
2701 * Called to reset things after an exception.
2705 * The eval commmand.
2709 evalcmd(int argc, char **argv)
2718 STARTSTACKSTR(concat);
2721 concat = stputs(p, concat);
2722 if ((p = *ap++) == NULL)
2724 STPUTC(' ', concat);
2726 STPUTC('\0', concat);
2727 p = grabstackstr(concat);
2736 * Execute a command or commands contained in a string.
2743 struct stackmark smark;
2745 setstackmark(&smark);
2748 while ((n = parsecmd(0)) != NEOF) {
2750 popstackmark(&smark);
2755 popstackmark(&smark);
2761 * Evaluate a parse tree. The value is left in the global variable
2766 evaltree(union node *n, int flags)
2769 void (*evalfn)(union node *, int);
2773 TRACE(("evaltree(NULL) called\n"));
2776 TRACE(("pid %d, evaltree(%p: %d, %d) called\n",
2777 getpid(), n, n->type, flags));
2781 out1fmt("Node type = %d\n", n->type);
2786 evaltree(n->nnot.com, EV_TESTED);
2787 status = !exitstatus;
2790 expredir(n->nredir.redirect);
2791 status = redirectsafe(n->nredir.redirect, REDIR_PUSH);
2793 evaltree(n->nredir.n, flags & EV_TESTED);
2794 status = exitstatus;
2799 evalfn = evalcommand;
2801 if (eflag && !(flags & EV_TESTED))
2813 evalfn = evalsubshell;
2825 #error NAND + 1 != NOR
2827 #if NOR + 1 != NSEMI
2828 #error NOR + 1 != NSEMI
2830 isor = n->type - NAND;
2833 (flags | ((isor >> 1) - 1)) & EV_TESTED
2835 if (!exitstatus == isor)
2847 evaltree(n->nif.test, EV_TESTED);
2850 if (exitstatus == 0) {
2853 } else if (n->nif.elsepart) {
2854 n = n->nif.elsepart;
2859 defun(n->narg.text, n->narg.next);
2863 exitstatus = status;
2869 if (flags & EV_EXIT || checkexit & exitstatus)
2874 #if !defined(__alpha__) || (defined(__GNUC__) && __GNUC__ >= 3)
2877 void evaltreenr(union node *, int) __attribute__ ((alias("evaltree"),__noreturn__));
2881 evalloop(union node *n, int flags)
2891 evaltree(n->nbinary.ch1, EV_TESTED);
2893 skipping: if (evalskip == SKIPCONT && --skipcount <= 0) {
2897 if (evalskip == SKIPBREAK && --skipcount <= 0)
2902 if (n->type != NWHILE)
2906 evaltree(n->nbinary.ch2, flags);
2907 status = exitstatus;
2912 exitstatus = status;
2918 evalfor(union node *n, int flags)
2920 struct arglist arglist;
2923 struct stackmark smark;
2925 setstackmark(&smark);
2926 arglist.lastp = &arglist.list;
2927 for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
2928 expandarg(argp, &arglist, EXP_FULL | EXP_TILDE | EXP_RECORD);
2933 *arglist.lastp = NULL;
2938 for (sp = arglist.list ; sp ; sp = sp->next) {
2939 setvar(n->nfor.var, sp->text, 0);
2940 evaltree(n->nfor.body, flags);
2942 if (evalskip == SKIPCONT && --skipcount <= 0) {
2946 if (evalskip == SKIPBREAK && --skipcount <= 0)
2953 popstackmark(&smark);
2959 evalcase(union node *n, int flags)
2963 struct arglist arglist;
2964 struct stackmark smark;
2966 setstackmark(&smark);
2967 arglist.lastp = &arglist.list;
2968 expandarg(n->ncase.expr, &arglist, EXP_TILDE);
2970 for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) {
2971 for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
2972 if (casematch(patp, arglist.list->text)) {
2973 if (evalskip == 0) {
2974 evaltree(cp->nclist.body, flags);
2981 popstackmark(&smark);
2987 * Kick off a subshell to evaluate a tree.
2991 evalsubshell(union node *n, int flags)
2994 int backgnd = (n->type == NBACKGND);
2997 expredir(n->nredir.redirect);
2998 if (!backgnd && flags & EV_EXIT && !trap[0])
3002 if (forkshell(jp, n, backgnd) == 0) {
3006 flags &=~ EV_TESTED;
3008 redirect(n->nredir.redirect, 0);
3009 evaltreenr(n->nredir.n, flags);
3014 status = waitforjob(jp);
3015 exitstatus = status;
3022 * Compute the names of the files in a redirection list.
3026 expredir(union node *n)
3030 for (redir = n ; redir ; redir = redir->nfile.next) {
3032 fn.lastp = &fn.list;
3033 switch (redir->type) {
3039 expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR);
3040 redir->nfile.expfname = fn.list->text;
3044 if (redir->ndup.vname) {
3045 expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE);
3046 fixredir(redir, fn.list->text, 1);
3056 * Evaluate a pipeline. All the processes in the pipeline are children
3057 * of the process creating the pipeline. (This differs from some versions
3058 * of the shell, which make the last process in a pipeline the parent
3063 evalpipe(union node *n, int flags)
3066 struct nodelist *lp;
3071 TRACE(("evalpipe(0x%lx) called\n", (long)n));
3073 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
3077 jp = makejob(n, pipelen);
3079 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
3083 if (pipe(pip) < 0) {
3085 error("Pipe call failed");
3088 if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
3101 evaltreenr(lp->n, flags);
3109 if (n->npipe.backgnd == 0) {
3110 exitstatus = waitforjob(jp);
3111 TRACE(("evalpipe: job done exit status %d\n", exitstatus));
3119 * Execute a command inside back quotes. If it's a builtin command, we
3120 * want to save its output in a block obtained from malloc. Otherwise
3121 * we fork off a subprocess and get the output of the command via a pipe.
3122 * Should be called with interrupts off.
3126 evalbackcmd(union node *n, struct backcmd *result)
3138 saveherefd = herefd;
3146 error("Pipe call failed");
3148 if (forkshell(jp, n, FORK_NOJOB) == 0) {
3157 evaltreenr(n, EV_EXIT);
3161 result->fd = pip[0];
3164 herefd = saveherefd;
3166 TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n",
3167 result->fd, result->buf, result->nleft, result->jp));
3170 #ifdef CONFIG_ASH_CMDCMD
3171 static inline char **
3172 parse_command_args(char **argv, const char **path)
3184 if (c == '-' && !*cp) {
3194 /* run 'typecmd' for other options */
3197 } while ((c = *cp++));
3206 * Execute a simple command.
3210 evalcommand(union node *cmd, int flags)
3212 struct stackmark smark;
3214 struct arglist arglist;
3215 struct arglist varlist;
3218 const struct strlist *sp;
3219 struct cmdentry cmdentry;
3228 /* First expand the arguments. */
3229 TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags));
3230 setstackmark(&smark);
3231 back_exitstatus = 0;
3233 cmdentry.cmdtype = CMDBUILTIN;
3234 cmdentry.u.cmd = &bltin;
3235 varlist.lastp = &varlist.list;
3236 *varlist.lastp = NULL;
3237 arglist.lastp = &arglist.list;
3238 *arglist.lastp = NULL;
3241 for (argp = cmd->ncmd.args; argp; argp = argp->narg.next) {
3242 struct strlist **spp;
3244 spp = arglist.lastp;
3245 expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
3246 for (sp = *spp; sp; sp = sp->next)
3250 argv = nargv = stalloc(sizeof (char *) * (argc + 1));
3251 for (sp = arglist.list ; sp ; sp = sp->next) {
3252 TRACE(("evalcommand arg: %s\n", sp->text));
3253 *nargv++ = sp->text;
3258 if (iflag && funcnest == 0 && argc > 0)
3259 lastarg = nargv[-1];
3262 expredir(cmd->ncmd.redirect);
3263 status = redirectsafe(cmd->ncmd.redirect, REDIR_PUSH|REDIR_SAVEFD2);
3266 for (argp = cmd->ncmd.assign; argp; argp = argp->narg.next) {
3267 struct strlist **spp;
3270 spp = varlist.lastp;
3271 expandarg(argp, &varlist, EXP_VARTILDE);
3274 * Modify the command lookup path, if a PATH= assignment
3278 if (varequal(p, path))
3282 /* Print the command if xflag is set. */
3285 const char *p = " %s";
3288 dprintf(preverrout_fd, p, ps4val());
3291 for(n = 0; n < 2; n++) {
3293 dprintf(preverrout_fd, p, sp->text);
3301 bb_full_write(preverrout_fd, "\n", 1);
3307 /* Now locate the command. */
3309 const char *oldpath;
3310 int cmd_flag = DO_ERR;
3315 find_command(argv[0], &cmdentry, cmd_flag, path);
3316 if (cmdentry.cmdtype == CMDUNKNOWN) {
3322 /* implement bltin and command here */
3323 if (cmdentry.cmdtype != CMDBUILTIN)
3326 spclbltin = IS_BUILTIN_SPECIAL(cmdentry.u.cmd);
3327 if (cmdentry.u.cmd == EXECCMD)
3329 #ifdef CONFIG_ASH_CMDCMD
3330 if (cmdentry.u.cmd == COMMANDCMD) {
3333 nargv = parse_command_args(argv, &path);
3336 argc -= nargv - argv;
3338 cmd_flag |= DO_NOFUNC;
3346 /* We have a redirection error. */
3350 exitstatus = status;
3354 /* Execute the command. */
3355 switch (cmdentry.cmdtype) {
3357 /* Fork off a child process if necessary. */
3358 if (!(flags & EV_EXIT) || trap[0]) {
3360 jp = makejob(cmd, 1);
3361 if (forkshell(jp, cmd, FORK_FG) != 0) {
3362 exitstatus = waitforjob(jp);
3368 listsetvar(varlist.list, VEXPORT|VSTACK);
3369 shellexec(argv, path, cmdentry.u.index);
3373 cmdenviron = varlist.list;
3375 struct strlist *list = cmdenviron;
3377 if (spclbltin > 0 || argc == 0) {
3379 if (cmd_is_exec && argc > 1)
3382 listsetvar(list, i);
3384 if (evalbltin(cmdentry.u.cmd, argc, argv)) {
3399 exit_status = j + 128;
3400 exitstatus = exit_status;
3402 if (i == EXINT || spclbltin > 0) {
3404 longjmp(handler->loc, 1);
3411 listsetvar(varlist.list, 0);
3412 if (evalfun(cmdentry.u.func, argc, argv, flags))
3418 popredir(cmd_is_exec);
3420 /* dsl: I think this is intended to be used to support
3421 * '_' in 'vi' command mode during line editing...
3422 * However I implemented that within libedit itself.
3424 setvar("_", lastarg, 0);
3425 popstackmark(&smark);
3429 evalbltin(const struct builtincmd *cmd, int argc, char **argv) {
3430 char *volatile savecmdname;
3431 struct jmploc *volatile savehandler;
3432 struct jmploc jmploc;
3435 savecmdname = commandname;
3436 if ((i = setjmp(jmploc.loc)))
3438 savehandler = handler;
3440 commandname = argv[0];
3442 optptr = NULL; /* initialize nextopt */
3443 exitstatus = (*cmd->builtin)(argc, argv);
3446 exitstatus |= ferror(stdout);
3447 commandname = savecmdname;
3449 handler = savehandler;
3455 evalfun(struct funcnode *func, int argc, char **argv, int flags)
3457 volatile struct shparam saveparam;
3458 struct localvar *volatile savelocalvars;
3459 struct jmploc *volatile savehandler;
3460 struct jmploc jmploc;
3463 saveparam = shellparam;
3464 savelocalvars = localvars;
3465 if ((e = setjmp(jmploc.loc))) {
3469 savehandler = handler;
3472 shellparam.malloc = 0;
3475 shellparam.nparam = argc - 1;
3476 shellparam.p = argv + 1;
3477 #ifdef CONFIG_ASH_GETOPTS
3478 shellparam.optind = 1;
3479 shellparam.optoff = -1;
3482 evaltree(&func->n, flags & EV_TESTED);
3488 localvars = savelocalvars;
3489 freeparam(&shellparam);
3490 shellparam = saveparam;
3491 handler = savehandler;
3493 if (evalskip == SKIPFUNC) {
3502 goodname(const char *p)
3504 return !*endofname(p);
3508 * Search for a command. This is called before we fork so that the
3509 * location of the command will be available in the parent as well as
3510 * the child. The check for "goodname" is an overly conservative
3511 * check that the name will not be subject to expansion.
3515 prehash(union node *n)
3517 struct cmdentry entry;
3519 if (n->type == NCMD && n->ncmd.args)
3520 if (goodname(n->ncmd.args->narg.text))
3521 find_command(n->ncmd.args->narg.text, &entry, 0,
3528 * Builtin commands. Builtin commands whose functions are closely
3529 * tied to evaluation are implemented here.
3537 bltincmd(int argc, char **argv)
3540 * Preserve exitstatus of a previous possible redirection
3543 return back_exitstatus;
3548 * Handle break and continue commands. Break, continue, and return are
3549 * all handled by setting the evalskip flag. The evaluation routines
3550 * above all check this flag, and if it is set they start skipping
3551 * commands rather than executing them. The variable skipcount is
3552 * the number of loops to break/continue, or the number of function
3553 * levels to return. (The latter is always 1.) It should probably
3554 * be an error to break out of more loops than exist, but it isn't
3555 * in the standard shell so we don't make it one here.
3559 breakcmd(int argc, char **argv)
3561 int n = argc > 1 ? number(argv[1]) : 1;
3564 error(illnum, argv[1]);
3568 evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK;
3576 * The return command.
3580 returncmd(int argc, char **argv)
3582 int ret = argc > 1 ? number(argv[1]) : exitstatus;
3585 evalskip = SKIPFUNC;
3590 /* Do what ksh does; skip the rest of the file */
3591 evalskip = SKIPFILE;
3599 falsecmd(int argc, char **argv)
3606 truecmd(int argc, char **argv)
3613 execcmd(int argc, char **argv)
3616 iflag = 0; /* exit on error */
3619 shellexec(argv + 1, pathval(), 0);
3625 /* $NetBSD: exec.c,v 1.35 2003/01/22 20:36:04 dsl Exp $ */
3628 * When commands are first encountered, they are entered in a hash table.
3629 * This ensures that a full path search will not have to be done for them
3630 * on each invocation.
3632 * We should investigate converting to a linear search, even though that
3633 * would make the command name "hash" a misnomer.
3636 #define CMDTABLESIZE 31 /* should be prime */
3637 #define ARB 1 /* actual size determined at run time */
3642 struct tblentry *next; /* next entry in hash chain */
3643 union param param; /* definition of builtin function */
3644 short cmdtype; /* index identifying command */
3645 char rehash; /* if set, cd done since entry created */
3646 char cmdname[ARB]; /* name of command */
3650 static struct tblentry *cmdtable[CMDTABLESIZE];
3651 static int builtinloc = -1; /* index in path of %builtin, or -1 */
3654 static void tryexec(char *, char **, char **);
3655 static void clearcmdentry(int);
3656 static struct tblentry *cmdlookup(const char *, int);
3657 static void delete_cmd_entry(void);
3661 * Exec a program. Never returns. If you change this routine, you may
3662 * have to change the find_command routine as well.
3666 shellexec(char **argv, const char *path, int idx)
3673 envp = environment();
3674 if (strchr(argv[0], '/') != NULL
3675 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3676 || find_applet_by_name(argv[0])
3679 tryexec(argv[0], argv, envp);
3683 while ((cmdname = padvance(&path, argv[0])) != NULL) {
3684 if (--idx < 0 && pathopt == NULL) {
3685 tryexec(cmdname, argv, envp);
3686 if (errno != ENOENT && errno != ENOTDIR)
3693 /* Map to POSIX errors */
3705 TRACE(("shellexec failed for %s, errno %d, suppressint %d\n",
3706 argv[0], e, suppressint ));
3707 exerror(EXEXEC, "%s: %s", argv[0], errmsg(e, E_EXEC));
3713 tryexec(char *cmd, char **argv, char **envp)
3716 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3720 if(strchr(name, '/') == NULL && find_applet_by_name(name) != NULL) {
3728 if(strcmp(name, "busybox")) {
3729 for (ap = argv; *ap; ap++);
3730 ap = new = xmalloc((ap - argv + 2) * sizeof(char *));
3731 *ap++ = cmd = "/bin/busybox";
3732 while ((*ap++ = *argv++));
3736 cmd = "/bin/busybox";
3744 execve(cmd, argv, envp);
3745 } while (errno == EINTR);
3747 execve(cmd, argv, envp);
3751 } else if (errno == ENOEXEC) {
3755 for (ap = argv; *ap; ap++)
3757 ap = new = ckmalloc((ap - argv + 2) * sizeof(char *));
3759 *ap = cmd = (char *)DEFAULT_SHELL;
3762 while ((*ap++ = *argv++))
3772 * Do a path search. The variable path (passed by reference) should be
3773 * set to the start of the path before the first call; padvance will update
3774 * this value as it proceeds. Successive calls to padvance will return
3775 * the possible path expansions in sequence. If an option (indicated by
3776 * a percent sign) appears in the path entry then the global variable
3777 * pathopt will be set to point to it; otherwise pathopt will be set to
3782 padvance(const char **path, const char *name)
3792 for (p = start ; *p && *p != ':' && *p != '%' ; p++);
3793 len = p - start + strlen(name) + 2; /* "2" is for '/' and '\0' */
3794 while (stackblocksize() < len)
3798 memcpy(q, start, p - start);
3806 while (*p && *p != ':') p++;
3812 return stalloc(len);
3816 /*** Command hashing code ***/
3819 printentry(struct tblentry *cmdp)
3825 idx = cmdp->param.index;
3828 name = padvance(&path, cmdp->cmdname);
3830 } while (--idx >= 0);
3831 out1fmt("%s%s\n", name, (cmdp->rehash ? "*" : nullstr));
3836 hashcmd(int argc, char **argv)
3838 struct tblentry **pp;
3839 struct tblentry *cmdp;
3841 struct cmdentry entry;
3844 while ((c = nextopt("r")) != '\0') {
3848 if (*argptr == NULL) {
3849 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
3850 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
3851 if (cmdp->cmdtype == CMDNORMAL)
3858 while ((name = *argptr) != NULL) {
3859 if ((cmdp = cmdlookup(name, 0)) != NULL
3860 && (cmdp->cmdtype == CMDNORMAL
3861 || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0)))
3863 find_command(name, &entry, DO_ERR, pathval());
3864 if (entry.cmdtype == CMDUNKNOWN)
3873 * Resolve a command name. If you change this routine, you may have to
3874 * change the shellexec routine as well.
3878 find_command(char *name, struct cmdentry *entry, int act, const char *path)
3880 struct tblentry *cmdp;
3887 struct builtincmd *bcmd;
3889 /* If name contains a slash, don't use PATH or hash table */
3890 if (strchr(name, '/') != NULL) {
3891 entry->u.index = -1;
3893 while (stat(name, &statb) < 0) {
3898 entry->cmdtype = CMDUNKNOWN;
3902 entry->cmdtype = CMDNORMAL;
3906 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3907 if (find_applet_by_name(name)) {
3908 entry->cmdtype = CMDNORMAL;
3909 entry->u.index = -1;
3914 updatetbl = (path == pathval());
3917 if (strstr(path, "%builtin") != NULL)
3921 /* If name is in the table, check answer will be ok */
3922 if ((cmdp = cmdlookup(name, 0)) != NULL) {
3925 switch (cmdp->cmdtype) {
3943 } else if (cmdp->rehash == 0)
3944 /* if not invalidated by cd, we're done */
3948 /* If %builtin not in path, check for builtin next */
3949 bcmd = find_builtin(name);
3950 if (bcmd && (IS_BUILTIN_REGULAR(bcmd) || (
3951 act & DO_ALTPATH ? !(act & DO_ALTBLTIN) : builtinloc <= 0
3953 goto builtin_success;
3955 /* We have to search path. */
3956 prev = -1; /* where to start */
3957 if (cmdp && cmdp->rehash) { /* doing a rehash */
3958 if (cmdp->cmdtype == CMDBUILTIN)
3961 prev = cmdp->param.index;
3967 while ((fullname = padvance(&path, name)) != NULL) {
3968 stunalloc(fullname);
3971 if (prefix(pathopt, "builtin")) {
3973 goto builtin_success;
3975 } else if (!(act & DO_NOFUNC) &&
3976 prefix(pathopt, "func")) {
3979 /* ignore unimplemented options */
3983 /* if rehash, don't redo absolute path names */
3984 if (fullname[0] == '/' && idx <= prev) {
3987 TRACE(("searchexec \"%s\": no change\n", name));
3990 while (stat(fullname, &statb) < 0) {
3995 if (errno != ENOENT && errno != ENOTDIR)
3999 e = EACCES; /* if we fail, this will be the error */
4000 if (!S_ISREG(statb.st_mode))
4002 if (pathopt) { /* this is a %func directory */
4003 stalloc(strlen(fullname) + 1);
4004 readcmdfile(fullname);
4005 if ((cmdp = cmdlookup(name, 0)) == NULL ||
4006 cmdp->cmdtype != CMDFUNCTION)
4007 error("%s not defined in %s", name, fullname);
4008 stunalloc(fullname);
4011 TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
4013 entry->cmdtype = CMDNORMAL;
4014 entry->u.index = idx;
4018 cmdp = cmdlookup(name, 1);
4019 cmdp->cmdtype = CMDNORMAL;
4020 cmdp->param.index = idx;
4025 /* We failed. If there was an entry for this command, delete it */
4026 if (cmdp && updatetbl)
4029 sh_warnx("%s: %s", name, errmsg(e, E_EXEC));
4030 entry->cmdtype = CMDUNKNOWN;
4035 entry->cmdtype = CMDBUILTIN;
4036 entry->u.cmd = bcmd;
4040 cmdp = cmdlookup(name, 1);
4041 cmdp->cmdtype = CMDBUILTIN;
4042 cmdp->param.cmd = bcmd;
4046 entry->cmdtype = cmdp->cmdtype;
4047 entry->u = cmdp->param;
4052 * Wrapper around strcmp for qsort/bsearch/...
4054 static int pstrcmp(const void *a, const void *b)
4056 return strcmp((const char *) a, (*(const char *const *) b) + 1);
4060 * Search the table of builtin commands.
4063 static struct builtincmd *
4064 find_builtin(const char *name)
4066 struct builtincmd *bp;
4069 name, builtincmd, NUMBUILTINS, sizeof(struct builtincmd),
4078 * Called when a cd is done. Marks all commands so the next time they
4079 * are executed they will be rehashed.
4085 struct tblentry **pp;
4086 struct tblentry *cmdp;
4088 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
4089 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
4090 if (cmdp->cmdtype == CMDNORMAL || (
4091 cmdp->cmdtype == CMDBUILTIN &&
4092 !(IS_BUILTIN_REGULAR(cmdp->param.cmd)) &&
4103 * Fix command hash table when PATH changed.
4104 * Called before PATH is changed. The argument is the new value of PATH;
4105 * pathval() still returns the old value at this point.
4106 * Called with interrupts off.
4110 changepath(const char *newval)
4112 const char *old, *new;
4119 firstchange = 9999; /* assume no change */
4125 if ((*old == '\0' && *new == ':')
4126 || (*old == ':' && *new == '\0'))
4128 old = new; /* ignore subsequent differences */
4132 if (*new == '%' && idx_bltin < 0 && prefix(new + 1, "builtin"))
4139 if (builtinloc < 0 && idx_bltin >= 0)
4140 builtinloc = idx_bltin; /* zap builtins */
4141 if (builtinloc >= 0 && idx_bltin < 0)
4143 clearcmdentry(firstchange);
4144 builtinloc = idx_bltin;
4149 * Clear out command entries. The argument specifies the first entry in
4150 * PATH which has changed.
4154 clearcmdentry(int firstchange)
4156 struct tblentry **tblp;
4157 struct tblentry **pp;
4158 struct tblentry *cmdp;
4161 for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
4163 while ((cmdp = *pp) != NULL) {
4164 if ((cmdp->cmdtype == CMDNORMAL &&
4165 cmdp->param.index >= firstchange)
4166 || (cmdp->cmdtype == CMDBUILTIN &&
4167 builtinloc >= firstchange)) {
4181 * Locate a command in the command hash table. If "add" is nonzero,
4182 * add the command to the table if it is not already present. The
4183 * variable "lastcmdentry" is set to point to the address of the link
4184 * pointing to the entry, so that delete_cmd_entry can delete the
4187 * Interrupts must be off if called with add != 0.
4190 static struct tblentry **lastcmdentry;
4193 static struct tblentry *
4194 cmdlookup(const char *name, int add)
4196 unsigned int hashval;
4198 struct tblentry *cmdp;
4199 struct tblentry **pp;
4202 hashval = (unsigned char)*p << 4;
4204 hashval += (unsigned char)*p++;
4206 pp = &cmdtable[hashval % CMDTABLESIZE];
4207 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
4208 if (equal(cmdp->cmdname, name))
4212 if (add && cmdp == NULL) {
4213 cmdp = *pp = ckmalloc(sizeof (struct tblentry) - ARB
4214 + strlen(name) + 1);
4216 cmdp->cmdtype = CMDUNKNOWN;
4217 strcpy(cmdp->cmdname, name);
4224 * Delete the command entry returned on the last lookup.
4228 delete_cmd_entry(void)
4230 struct tblentry *cmdp;
4233 cmdp = *lastcmdentry;
4234 *lastcmdentry = cmdp->next;
4235 if (cmdp->cmdtype == CMDFUNCTION)
4236 freefunc(cmdp->param.func);
4243 * Add a new command entry, replacing any existing command entry for
4244 * the same name - except special builtins.
4248 addcmdentry(char *name, struct cmdentry *entry)
4250 struct tblentry *cmdp;
4252 cmdp = cmdlookup(name, 1);
4253 if (cmdp->cmdtype == CMDFUNCTION) {
4254 freefunc(cmdp->param.func);
4256 cmdp->cmdtype = entry->cmdtype;
4257 cmdp->param = entry->u;
4262 * Make a copy of a parse tree.
4265 static inline struct funcnode *
4266 copyfunc(union node *n)
4271 funcblocksize = offsetof(struct funcnode, n);
4274 blocksize = funcblocksize;
4275 f = ckmalloc(blocksize + funcstringsize);
4276 funcblock = (char *) f + offsetof(struct funcnode, n);
4277 funcstring = (char *) f + blocksize;
4284 * Define a shell function.
4288 defun(char *name, union node *func)
4290 struct cmdentry entry;
4293 entry.cmdtype = CMDFUNCTION;
4294 entry.u.func = copyfunc(func);
4295 addcmdentry(name, &entry);
4301 * Delete a function if it exists.
4305 unsetfunc(const char *name)
4307 struct tblentry *cmdp;
4309 if ((cmdp = cmdlookup(name, 0)) != NULL &&
4310 cmdp->cmdtype == CMDFUNCTION)
4315 * Locate and print what a word is...
4319 #ifdef CONFIG_ASH_CMDCMD
4321 describe_command(char *command, int describe_command_verbose)
4323 #define describe_command_verbose 1
4325 describe_command(char *command)
4328 struct cmdentry entry;
4329 struct tblentry *cmdp;
4330 #ifdef CONFIG_ASH_ALIAS
4331 const struct alias *ap;
4333 const char *path = pathval();
4335 if (describe_command_verbose) {
4339 /* First look at the keywords */
4340 if (findkwd(command)) {
4341 out1str(describe_command_verbose ? " is a shell keyword" : command);
4345 #ifdef CONFIG_ASH_ALIAS
4346 /* Then look at the aliases */
4347 if ((ap = lookupalias(command, 0)) != NULL) {
4348 if (describe_command_verbose) {
4349 out1fmt(" is an alias for %s", ap->val);
4358 /* Then check if it is a tracked alias */
4359 if ((cmdp = cmdlookup(command, 0)) != NULL) {
4360 entry.cmdtype = cmdp->cmdtype;
4361 entry.u = cmdp->param;
4363 /* Finally use brute force */
4364 find_command(command, &entry, DO_ABS, path);
4367 switch (entry.cmdtype) {
4369 int j = entry.u.index;
4375 p = padvance(&path, command);
4379 if (describe_command_verbose) {
4381 (cmdp ? " a tracked alias for" : nullstr), p
4390 if (describe_command_verbose) {
4391 out1str(" is a shell function");
4398 if (describe_command_verbose) {
4399 out1fmt(" is a %sshell builtin",
4400 IS_BUILTIN_SPECIAL(entry.u.cmd) ?
4401 "special " : nullstr
4409 if (describe_command_verbose) {
4410 out1str(": not found\n");
4416 outstr("\n", stdout);
4421 typecmd(int argc, char **argv)
4426 for (i = 1; i < argc; i++) {
4427 #ifdef CONFIG_ASH_CMDCMD
4428 err |= describe_command(argv[i], 1);
4430 err |= describe_command(argv[i]);
4436 #ifdef CONFIG_ASH_CMDCMD
4438 commandcmd(int argc, char **argv)
4441 int default_path = 0;
4442 int verify_only = 0;
4443 int verbose_verify_only = 0;
4445 while ((c = nextopt("pvV")) != '\0')
4450 "command: nextopt returned character code 0%o\n", c);
4460 verbose_verify_only = 1;
4464 if (default_path + verify_only + verbose_verify_only > 1 ||
4467 "command [-p] command [arg ...]\n"
4468 "command {-v|-V} command\n");
4472 if (verify_only || verbose_verify_only) {
4473 return describe_command(*argptr, verbose_verify_only);
4480 /* $NetBSD: expand.c,v 1.56 2002/11/24 22:35:39 christos Exp $ */
4483 * Routines to expand arguments to commands. We have to deal with
4484 * backquotes, shell variables, and file metacharacters.
4490 #define RMESCAPE_ALLOC 0x1 /* Allocate a new string */
4491 #define RMESCAPE_GLOB 0x2 /* Add backslashes for glob */
4492 #define RMESCAPE_QUOTED 0x4 /* Remove CTLESC unless in quotes */
4493 #define RMESCAPE_GROW 0x8 /* Grow strings instead of stalloc */
4494 #define RMESCAPE_HEAP 0x10 /* Malloc strings instead of stalloc */
4497 * Structure specifying which parts of the string should be searched
4498 * for IFS characters.
4502 struct ifsregion *next; /* next region in list */
4503 int begoff; /* offset of start of region */
4504 int endoff; /* offset of end of region */
4505 int nulonly; /* search for nul bytes only */
4508 /* output of current string */
4509 static char *expdest;
4510 /* list of back quote expressions */
4511 static struct nodelist *argbackq;
4512 /* first struct in list of ifs regions */
4513 static struct ifsregion ifsfirst;
4514 /* last struct in list */
4515 static struct ifsregion *ifslastp;
4516 /* holds expanded arg list */
4517 static struct arglist exparg;
4519 static void argstr(char *, int);
4520 static char *exptilde(char *, char *, int);
4521 static void expbackq(union node *, int, int);
4522 static const char *subevalvar(char *, char *, int, int, int, int, int);
4523 static char *evalvar(char *, int);
4524 static void strtodest(const char *, int, int);
4525 static void memtodest(const char *p, size_t len, int syntax, int quotes);
4526 static ssize_t varvalue(char *, int, int);
4527 static void recordregion(int, int, int);
4528 static void removerecordregions(int);
4529 static void ifsbreakup(char *, struct arglist *);
4530 static void ifsfree(void);
4531 static void expandmeta(struct strlist *, int);
4532 static int patmatch(char *, const char *);
4534 static int cvtnum(long);
4535 static size_t esclen(const char *, const char *);
4536 static char *scanleft(char *, char *, char *, char *, int, int);
4537 static char *scanright(char *, char *, char *, char *, int, int);
4538 static void varunset(const char *, const char *, const char *, int)
4539 __attribute__((__noreturn__));
4542 #define pmatch(a, b) !fnmatch((a), (b), 0)
4544 * Prepare a pattern for a expmeta (internal glob(3)) call.
4546 * Returns an stalloced string.
4549 static inline char *
4550 preglob(const char *pattern, int quoted, int flag) {
4551 flag |= RMESCAPE_GLOB;
4553 flag |= RMESCAPE_QUOTED;
4555 return _rmescapes((char *)pattern, flag);
4560 esclen(const char *start, const char *p) {
4563 while (p > start && *--p == CTLESC) {
4571 * Expand shell variables and backquotes inside a here document.
4575 expandhere(union node *arg, int fd)
4578 expandarg(arg, (struct arglist *)NULL, 0);
4579 bb_full_write(fd, stackblock(), expdest - (char *)stackblock());
4584 * Perform variable substitution and command substitution on an argument,
4585 * placing the resulting list of arguments in arglist. If EXP_FULL is true,
4586 * perform splitting and file name expansion. When arglist is NULL, perform
4587 * here document expansion.
4591 expandarg(union node *arg, struct arglist *arglist, int flag)
4596 argbackq = arg->narg.backquote;
4597 STARTSTACKSTR(expdest);
4598 ifsfirst.next = NULL;
4600 argstr(arg->narg.text, flag);
4601 if (arglist == NULL) {
4602 return; /* here document expanded */
4604 STPUTC('\0', expdest);
4605 p = grabstackstr(expdest);
4606 exparg.lastp = &exparg.list;
4610 if (flag & EXP_FULL) {
4611 ifsbreakup(p, &exparg);
4612 *exparg.lastp = NULL;
4613 exparg.lastp = &exparg.list;
4614 expandmeta(exparg.list, flag);
4616 if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */
4618 sp = (struct strlist *)stalloc(sizeof (struct strlist));
4621 exparg.lastp = &sp->next;
4625 *exparg.lastp = NULL;
4627 *arglist->lastp = exparg.list;
4628 arglist->lastp = exparg.lastp;
4634 * Perform variable and command substitution. If EXP_FULL is set, output CTLESC
4635 * characters to allow for further processing. Otherwise treat
4636 * $@ like $* since no splitting will be performed.
4640 argstr(char *p, int flag)
4642 static const char spclchars[] = {
4650 CTLBACKQ | CTLQUOTE,
4651 #ifdef CONFIG_ASH_MATH_SUPPORT
4656 const char *reject = spclchars;
4658 int quotes = flag & (EXP_FULL | EXP_CASE); /* do CTLESC */
4659 int breakall = flag & EXP_WORD;
4664 if (!(flag & EXP_VARTILDE)) {
4666 } else if (flag & EXP_VARTILDE2) {
4671 if (flag & EXP_TILDE) {
4677 if (*q == CTLESC && (flag & EXP_QWORD))
4680 p = exptilde(p, q, flag);
4683 startloc = expdest - (char *)stackblock();
4685 length += strcspn(p + length, reject);
4687 if (c && (!(c & 0x80)
4688 #ifdef CONFIG_ASH_MATH_SUPPORT
4692 /* c == '=' || c == ':' || c == CTLENDARI */
4697 expdest = stnputs(p, length, expdest);
4698 newloc = expdest - (char *)stackblock();
4699 if (breakall && !inquotes && newloc > startloc) {
4700 recordregion(startloc, newloc, 0);
4711 if (flag & EXP_VARTILDE2) {
4715 flag |= EXP_VARTILDE2;
4720 * sort of a hack - expand tildes in variable
4721 * assignments (after the first '=' and after ':'s).
4730 case CTLENDVAR: /* ??? */
4733 /* "$@" syntax adherence hack */
4736 !memcmp(p, dolatstr, DOLATSTRLEN) &&
4737 (p[4] == CTLQUOTEMARK || (
4738 p[4] == CTLENDVAR &&
4739 p[5] == CTLQUOTEMARK
4742 p = evalvar(p + 1, flag) + 1;
4745 inquotes = !inquotes;
4758 p = evalvar(p, flag);
4762 case CTLBACKQ|CTLQUOTE:
4763 expbackq(argbackq->n, c, quotes);
4764 argbackq = argbackq->next;
4766 #ifdef CONFIG_ASH_MATH_SUPPORT
4779 exptilde(char *startp, char *p, int flag)
4785 int quotes = flag & (EXP_FULL | EXP_CASE);
4790 while ((c = *++p) != '\0') {
4797 if (flag & EXP_VARTILDE)
4807 if (*name == '\0') {
4808 if ((home = lookupvar(homestr)) == NULL)
4811 if ((pw = getpwnam(name)) == NULL)
4818 startloc = expdest - (char *)stackblock();
4819 strtodest(home, SQSYNTAX, quotes);
4820 recordregion(startloc, expdest - (char *)stackblock(), 0);
4829 removerecordregions(int endoff)
4831 if (ifslastp == NULL)
4834 if (ifsfirst.endoff > endoff) {
4835 while (ifsfirst.next != NULL) {
4836 struct ifsregion *ifsp;
4838 ifsp = ifsfirst.next->next;
4839 ckfree(ifsfirst.next);
4840 ifsfirst.next = ifsp;
4843 if (ifsfirst.begoff > endoff)
4846 ifslastp = &ifsfirst;
4847 ifsfirst.endoff = endoff;
4852 ifslastp = &ifsfirst;
4853 while (ifslastp->next && ifslastp->next->begoff < endoff)
4854 ifslastp=ifslastp->next;
4855 while (ifslastp->next != NULL) {
4856 struct ifsregion *ifsp;
4858 ifsp = ifslastp->next->next;
4859 ckfree(ifslastp->next);
4860 ifslastp->next = ifsp;
4863 if (ifslastp->endoff > endoff)
4864 ifslastp->endoff = endoff;
4868 #ifdef CONFIG_ASH_MATH_SUPPORT
4870 * Expand arithmetic expression. Backup to start of expression,
4871 * evaluate, place result in (backed up) result, adjust string position.
4884 * This routine is slightly over-complicated for
4885 * efficiency. Next we scan backwards looking for the
4886 * start of arithmetic.
4888 start = stackblock();
4895 while (*p != CTLARI) {
4899 error("missing CTLARI (shouldn't happen)");
4904 esc = esclen(start, p);
4914 removerecordregions(begoff);
4923 len = cvtnum(dash_arith(p + 2));
4926 recordregion(begoff, begoff + len, 0);
4931 * Expand stuff in backwards quotes.
4935 expbackq(union node *cmd, int quoted, int quotes)
4943 int syntax = quoted? DQSYNTAX : BASESYNTAX;
4944 struct stackmark smark;
4947 setstackmark(&smark);
4949 startloc = dest - (char *)stackblock();
4951 evalbackcmd(cmd, (struct backcmd *) &in);
4952 popstackmark(&smark);
4959 memtodest(p, i, syntax, quotes);
4963 i = safe_read(in.fd, buf, sizeof buf);
4964 TRACE(("expbackq: read returns %d\n", i));
4974 back_exitstatus = waitforjob(in.jp);
4978 /* Eat all trailing newlines */
4980 for (; dest > (char *)stackblock() && dest[-1] == '\n';)
4985 recordregion(startloc, dest - (char *)stackblock(), 0);
4986 TRACE(("evalbackq: size=%d: \"%.*s\"\n",
4987 (dest - (char *)stackblock()) - startloc,
4988 (dest - (char *)stackblock()) - startloc,
4989 stackblock() + startloc));
4994 scanleft(char *startp, char *rmesc, char *rmescend, char *str, int quotes,
5005 const char *s = loc2;
5011 match = pmatch(str, s);
5015 if (quotes && *loc == CTLESC)
5025 scanright(char *startp, char *rmesc, char *rmescend, char *str, int quotes,
5032 for (loc = str - 1, loc2 = rmescend; loc >= startp; loc2--) {
5035 const char *s = loc2;
5040 match = pmatch(str, s);
5047 esc = esclen(startp, loc);
5059 subevalvar(char *p, char *str, int strloc, int subtype, int startloc, int varflags, int quotes)
5063 int saveherefd = herefd;
5064 struct nodelist *saveargbackq = argbackq;
5066 char *rmesc, *rmescend;
5068 char *(*scan)(char *, char *, char *, char *, int , int);
5071 argstr(p, subtype != VSASSIGN && subtype != VSQUESTION ? EXP_CASE : 0);
5072 STPUTC('\0', expdest);
5073 herefd = saveherefd;
5074 argbackq = saveargbackq;
5075 startp = stackblock() + startloc;
5079 setvar(str, startp, 0);
5080 amount = startp - expdest;
5081 STADJUST(amount, expdest);
5085 varunset(p, str, startp, varflags);
5089 subtype -= VSTRIMRIGHT;
5091 if (subtype < 0 || subtype > 3)
5096 rmescend = stackblock() + strloc;
5098 rmesc = _rmescapes(startp, RMESCAPE_ALLOC | RMESCAPE_GROW);
5099 if (rmesc != startp) {
5101 startp = stackblock() + startloc;
5105 str = stackblock() + strloc;
5106 preglob(str, varflags & VSQUOTE, 0);
5108 /* zero = subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX */
5109 zero = subtype >> 1;
5110 /* VSTRIMLEFT/VSTRIMRIGHTMAX -> scanleft */
5111 scan = (subtype & 1) ^ zero ? scanleft : scanright;
5113 loc = scan(startp, rmesc, rmescend, str, quotes, zero);
5116 memmove(startp, loc, str - loc);
5117 loc = startp + (str - loc) - 1;
5120 amount = loc - expdest;
5121 STADJUST(amount, expdest);
5128 * Expand a variable, and return a pointer to the next character in the
5132 evalvar(char *p, int flag)
5145 quotes = flag & (EXP_FULL | EXP_CASE);
5147 subtype = varflags & VSTYPE;
5148 quoted = varflags & VSQUOTE;
5150 easy = (!quoted || (*var == '@' && shellparam.nparam));
5151 startloc = expdest - (char *)stackblock();
5152 p = strchr(p, '=') + 1;
5155 varlen = varvalue(var, varflags, flag);
5156 if (varflags & VSNUL)
5159 if (subtype == VSPLUS) {
5160 varlen = -1 - varlen;
5164 if (subtype == VSMINUS) {
5168 p, flag | EXP_TILDE |
5169 (quoted ? EXP_QWORD : EXP_WORD)
5178 if (subtype == VSASSIGN || subtype == VSQUESTION) {
5180 if (subevalvar(p, var, 0, subtype, startloc,
5184 * Remove any recorded regions beyond
5187 removerecordregions(startloc);
5197 if (varlen < 0 && uflag)
5198 varunset(p, var, 0, 0);
5200 if (subtype == VSLENGTH) {
5201 cvtnum(varlen > 0 ? varlen : 0);
5205 if (subtype == VSNORMAL) {
5209 recordregion(startloc, expdest - (char *)stackblock(), quoted);
5218 case VSTRIMRIGHTMAX:
5227 * Terminate the string and start recording the pattern
5230 STPUTC('\0', expdest);
5231 patloc = expdest - (char *)stackblock();
5232 if (subevalvar(p, NULL, patloc, subtype,
5233 startloc, varflags, quotes) == 0) {
5234 int amount = expdest - (
5235 (char *)stackblock() + patloc - 1
5237 STADJUST(-amount, expdest);
5239 /* Remove any recorded regions beyond start of variable */
5240 removerecordregions(startloc);
5245 if (subtype != VSNORMAL) { /* skip to end of alternative */
5248 if ((c = *p++) == CTLESC)
5250 else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) {
5252 argbackq = argbackq->next;
5253 } else if (c == CTLVAR) {
5254 if ((*p++ & VSTYPE) != VSNORMAL)
5256 } else if (c == CTLENDVAR) {
5267 * Put a string on the stack.
5271 memtodest(const char *p, size_t len, int syntax, int quotes) {
5274 q = makestrspace(len * 2, q);
5280 if (quotes && (SIT(c, syntax) == CCTL || SIT(c, syntax) == CBACK))
5290 strtodest(const char *p, int syntax, int quotes)
5292 memtodest(p, strlen(p), syntax, quotes);
5297 * Add the value of a specialized variable to the stack string.
5301 varvalue(char *name, int varflags, int flags)
5311 int quoted = varflags & VSQUOTE;
5312 int subtype = varflags & VSTYPE;
5313 int quotes = flags & (EXP_FULL | EXP_CASE);
5315 if (quoted && (flags & EXP_FULL))
5316 sep = 1 << CHAR_BIT;
5318 syntax = quoted ? DQSYNTAX : BASESYNTAX;
5327 num = shellparam.nparam;
5337 p = makestrspace(NOPTS, expdest);
5338 for (i = NOPTS - 1; i >= 0; i--) {
5340 USTPUTC(optletters(i), p);
5351 sep = ifsset() ? ifsval()[0] : ' ';
5352 if (quotes && (SIT(sep, syntax) == CCTL || SIT(sep, syntax) == CBACK))
5355 if (!(ap = shellparam.p))
5357 while ((p = *ap++)) {
5360 partlen = strlen(p);
5363 if (len > partlen && sep) {
5367 if (subtype == VSPLUS || subtype == VSLENGTH) {
5377 if (!(subtype == VSPLUS || subtype == VSLENGTH))
5378 memtodest(p, partlen, syntax, quotes);
5392 if (num < 0 || num > shellparam.nparam)
5394 p = num ? shellparam.p[num - 1] : arg0;
5397 p = lookupvar(name);
5403 if (!(subtype == VSPLUS || subtype == VSLENGTH))
5404 memtodest(p, len, syntax, quotes);
5408 if (subtype == VSPLUS || subtype == VSLENGTH)
5409 STADJUST(-len, expdest);
5415 * Record the fact that we have to scan this region of the
5416 * string for IFS characters.
5420 recordregion(int start, int end, int nulonly)
5422 struct ifsregion *ifsp;
5424 if (ifslastp == NULL) {
5428 ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion));
5430 ifslastp->next = ifsp;
5434 ifslastp->begoff = start;
5435 ifslastp->endoff = end;
5436 ifslastp->nulonly = nulonly;
5441 * Break the argument string into pieces based upon IFS and add the
5442 * strings to the argument list. The regions of the string to be
5443 * searched for IFS characters have been stored by recordregion.
5446 ifsbreakup(char *string, struct arglist *arglist)
5448 struct ifsregion *ifsp;
5453 const char *ifs, *realifs;
5459 if (ifslastp != NULL) {
5462 realifs = ifsset() ? ifsval() : defifs;
5465 p = string + ifsp->begoff;
5466 nulonly = ifsp->nulonly;
5467 ifs = nulonly ? nullstr : realifs;
5469 while (p < string + ifsp->endoff) {
5473 if (strchr(ifs, *p)) {
5475 ifsspc = (strchr(defifs, *p) != NULL);
5476 /* Ignore IFS whitespace at start */
5477 if (q == start && ifsspc) {
5483 sp = (struct strlist *)stalloc(sizeof *sp);
5485 *arglist->lastp = sp;
5486 arglist->lastp = &sp->next;
5490 if (p >= string + ifsp->endoff) {
5496 if (strchr(ifs, *p) == NULL ) {
5499 } else if (strchr(defifs, *p) == NULL) {
5515 } while ((ifsp = ifsp->next) != NULL);
5524 sp = (struct strlist *)stalloc(sizeof *sp);
5526 *arglist->lastp = sp;
5527 arglist->lastp = &sp->next;
5533 struct ifsregion *p;
5538 struct ifsregion *ifsp;
5544 ifsfirst.next = NULL;
5548 static void expmeta(char *, char *);
5549 static struct strlist *expsort(struct strlist *);
5550 static struct strlist *msort(struct strlist *, int);
5552 static char *expdir;
5556 expandmeta(struct strlist *str, int flag)
5558 static const char metachars[] = {
5561 /* TODO - EXP_REDIR */
5564 struct strlist **savelastp;
5570 if (!strpbrk(str->text, metachars))
5572 savelastp = exparg.lastp;
5575 p = preglob(str->text, 0, RMESCAPE_ALLOC | RMESCAPE_HEAP);
5577 int i = strlen(str->text);
5578 expdir = ckmalloc(i < 2048 ? 2048 : i); /* XXX */
5586 if (exparg.lastp == savelastp) {
5591 *exparg.lastp = str;
5592 rmescapes(str->text);
5593 exparg.lastp = &str->next;
5595 *exparg.lastp = NULL;
5596 *savelastp = sp = expsort(*savelastp);
5597 while (sp->next != NULL)
5599 exparg.lastp = &sp->next;
5606 * Add a file name to the list.
5610 addfname(const char *name)
5614 sp = (struct strlist *)stalloc(sizeof *sp);
5615 sp->text = sstrdup(name);
5617 exparg.lastp = &sp->next;
5622 * Do metacharacter (i.e. *, ?, [...]) expansion.
5626 expmeta(char *enddir, char *name)
5641 for (p = name; *p; p++) {
5642 if (*p == '*' || *p == '?')
5644 else if (*p == '[') {
5651 if (*q == '/' || *q == '\0')
5658 } else if (*p == '\\')
5660 else if (*p == '/') {
5667 if (metaflag == 0) { /* we've reached the end of the file name */
5668 if (enddir != expdir)
5676 if (metaflag == 0 || lstat(expdir, &statb) >= 0)
5687 } while (p < start);
5689 if (enddir == expdir) {
5691 } else if (enddir == expdir + 1 && *expdir == '/') {
5697 if ((dirp = opendir(cp)) == NULL)
5699 if (enddir != expdir)
5701 if (*endname == 0) {
5713 while (! intpending && (dp = readdir(dirp)) != NULL) {
5714 if (dp->d_name[0] == '.' && ! matchdot)
5716 if (pmatch(start, dp->d_name)) {
5718 scopy(dp->d_name, enddir);
5721 for (p = enddir, cp = dp->d_name;
5722 (*p++ = *cp++) != '\0';)
5725 expmeta(p, endname);
5735 * Sort the results of file name expansion. It calculates the number of
5736 * strings to sort and then calls msort (short for merge sort) to do the
5740 static struct strlist *
5741 expsort(struct strlist *str)
5747 for (sp = str ; sp ; sp = sp->next)
5749 return msort(str, len);
5753 static struct strlist *
5754 msort(struct strlist *list, int len)
5756 struct strlist *p, *q = NULL;
5757 struct strlist **lpp;
5765 for (n = half ; --n >= 0 ; ) {
5769 q->next = NULL; /* terminate first half of list */
5770 q = msort(list, half); /* sort first half of list */
5771 p = msort(p, len - half); /* sort second half */
5774 #ifdef CONFIG_LOCALE_SUPPORT
5775 if (strcoll(p->text, q->text) < 0)
5777 if (strcmp(p->text, q->text) < 0)
5782 if ((p = *lpp) == NULL) {
5789 if ((q = *lpp) == NULL) {
5800 * Returns true if the pattern matches the string.
5804 patmatch(char *pattern, const char *string)
5806 return pmatch(preglob(pattern, 0, 0), string);
5811 * Remove any CTLESC characters from a string.
5815 _rmescapes(char *str, int flag)
5818 static const char qchars[] = { CTLESC, CTLQUOTEMARK, 0 };
5823 p = strpbrk(str, qchars);
5829 if (flag & RMESCAPE_ALLOC) {
5830 size_t len = p - str;
5831 size_t fulllen = len + strlen(p) + 1;
5833 if (flag & RMESCAPE_GROW) {
5834 r = makestrspace(fulllen, expdest);
5835 } else if (flag & RMESCAPE_HEAP) {
5836 r = ckmalloc(fulllen);
5838 r = stalloc(fulllen);
5842 q = mempcpy(q, str, len);
5845 inquotes = (flag & RMESCAPE_QUOTED) ^ RMESCAPE_QUOTED;
5846 globbing = flag & RMESCAPE_GLOB;
5847 notescaped = globbing;
5849 if (*p == CTLQUOTEMARK) {
5850 inquotes = ~inquotes;
5852 notescaped = globbing;
5856 /* naked back slash */
5862 if (notescaped && inquotes && *p != '/') {
5866 notescaped = globbing;
5871 if (flag & RMESCAPE_GROW) {
5873 STADJUST(q - r + 1, expdest);
5880 * See if a pattern matches in a case statement.
5884 casematch(union node *pattern, char *val)
5886 struct stackmark smark;
5889 setstackmark(&smark);
5890 argbackq = pattern->narg.backquote;
5891 STARTSTACKSTR(expdest);
5893 argstr(pattern->narg.text, EXP_TILDE | EXP_CASE);
5894 STACKSTRNUL(expdest);
5895 result = patmatch(stackblock(), val);
5896 popstackmark(&smark);
5909 expdest = makestrspace(32, expdest);
5910 len = fmtstr(expdest, 32, "%ld", num);
5911 STADJUST(len, expdest);
5916 varunset(const char *end, const char *var, const char *umsg, int varflags)
5922 msg = "parameter not set";
5924 if (*end == CTLENDVAR) {
5925 if (varflags & VSNUL)
5930 error("%.*s: %s%s", end - var - 1, var, msg, tail);
5934 /* $NetBSD: input.c,v 1.37 2002/11/24 22:35:40 christos Exp $ */
5937 * This implements the input routines used by the parser.
5940 #define EOF_NLEFT -99 /* value of parsenleft when EOF pushed back */
5941 #define IBUFSIZ (BUFSIZ + 1)
5943 static void pushfile(void);
5946 * Read a line from the script.
5949 static inline char *
5950 pfgets(char *line, int len)
5956 while (--nleft > 0) {
5973 * Read a character from the script, returning PEOF on end of file.
5974 * Nul characters in the input are silently discarded.
5977 #define pgetc_as_macro() (--parsenleft >= 0? *parsenextc++ : preadbuffer())
5979 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
5980 #define pgetc_macro() pgetc()
5984 return pgetc_as_macro();
5987 #define pgetc_macro() pgetc_as_macro()
5991 return pgetc_macro();
5997 * Same as pgetc(), but ignores PEOA.
5999 #ifdef CONFIG_ASH_ALIAS
6000 static int pgetc2(void)
6006 } while (c == PEOA);
6010 static inline int pgetc2(void)
6012 return pgetc_macro();
6017 #ifdef CONFIG_FEATURE_COMMAND_EDITING
6018 static const char *cmdedit_prompt;
6019 static inline void putprompt(const char *s)
6024 static inline void putprompt(const char *s)
6034 char *buf = parsefile->buf;
6038 #ifdef CONFIG_FEATURE_COMMAND_EDITING
6039 if (!iflag || parsefile->fd)
6040 nr = safe_read(parsefile->fd, buf, BUFSIZ - 1);
6042 cmdedit_path_lookup = pathval();
6043 nr = cmdedit_read_input((char *) cmdedit_prompt, buf);
6045 /* Ctrl+C presend */
6055 /* Ctrl+D presend */
6060 nr = safe_read(parsefile->fd, buf, BUFSIZ - 1);
6064 if (parsefile->fd == 0 && errno == EWOULDBLOCK) {
6065 int flags = fcntl(0, F_GETFL, 0);
6066 if (flags >= 0 && flags & O_NONBLOCK) {
6067 flags &=~ O_NONBLOCK;
6068 if (fcntl(0, F_SETFL, flags) >= 0) {
6069 out2str("sh: turning off NDELAY mode\n");
6079 * Refill the input buffer and return the next input character:
6081 * 1) If a string was pushed back on the input, pop it;
6082 * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading
6083 * from a string so we can't refill the buffer, return EOF.
6084 * 3) If the is more stuff in this buffer, use it else call read to fill it.
6085 * 4) Process input up to the next newline, deleting nul characters.
6095 while (parsefile->strpush) {
6096 #ifdef CONFIG_ASH_ALIAS
6097 if (parsenleft == -1 && parsefile->strpush->ap &&
6098 parsenextc[-1] != ' ' && parsenextc[-1] != '\t') {
6103 if (--parsenleft >= 0)
6104 return (*parsenextc++);
6106 if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
6111 if (parselleft <= 0) {
6112 if ((parselleft = preadfd()) <= 0) {
6113 parselleft = parsenleft = EOF_NLEFT;
6120 /* delete nul characters */
6121 for (more = 1; more;) {
6128 parsenleft = q - parsenextc;
6129 more = 0; /* Stop processing here */
6136 if (--parselleft <= 0 && more) {
6137 parsenleft = q - parsenextc - 1;
6148 out2str(parsenextc);
6153 return *parsenextc++;
6157 * Undo the last call to pgetc. Only one character may be pushed back.
6158 * PEOF may be pushed back.
6169 * Push a string back onto the input at this current parsefile level.
6170 * We handle aliases this way.
6173 pushstring(char *s, void *ap)
6180 /*dprintf("*** calling pushstring: %s, %d\n", s, len);*/
6181 if (parsefile->strpush) {
6182 sp = ckmalloc(sizeof (struct strpush));
6183 sp->prev = parsefile->strpush;
6184 parsefile->strpush = sp;
6186 sp = parsefile->strpush = &(parsefile->basestrpush);
6187 sp->prevstring = parsenextc;
6188 sp->prevnleft = parsenleft;
6189 #ifdef CONFIG_ASH_ALIAS
6190 sp->ap = (struct alias *)ap;
6192 ((struct alias *)ap)->flag |= ALIASINUSE;
6204 struct strpush *sp = parsefile->strpush;
6207 #ifdef CONFIG_ASH_ALIAS
6209 if (parsenextc[-1] == ' ' || parsenextc[-1] == '\t') {
6210 checkkwd |= CHKALIAS;
6212 if (sp->string != sp->ap->val) {
6215 sp->ap->flag &= ~ALIASINUSE;
6216 if (sp->ap->flag & ALIASDEAD) {
6217 unalias(sp->ap->name);
6221 parsenextc = sp->prevstring;
6222 parsenleft = sp->prevnleft;
6223 /*dprintf("*** calling popstring: restoring to '%s'\n", parsenextc);*/
6224 parsefile->strpush = sp->prev;
6225 if (sp != &(parsefile->basestrpush))
6231 * Set the input to take input from a file. If push is set, push the
6232 * old input onto the stack first.
6236 setinputfile(const char *fname, int push)
6242 if ((fd = open(fname, O_RDONLY)) < 0)
6243 error("Can't open %s", fname);
6245 fd2 = copyfd(fd, 10);
6248 error("Out of file descriptors");
6251 setinputfd(fd, push);
6257 * Like setinputfile, but takes an open file descriptor. Call this with
6262 setinputfd(int fd, int push)
6264 (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
6270 if (parsefile->buf == NULL)
6271 parsefile->buf = ckmalloc(IBUFSIZ);
6272 parselleft = parsenleft = 0;
6278 * Like setinputfile, but takes input from a string.
6282 setinputstring(char *string)
6286 parsenextc = string;
6287 parsenleft = strlen(string);
6288 parsefile->buf = NULL;
6295 * To handle the "." command, a stack of input files is used. Pushfile
6296 * adds a new entry to the stack and popfile restores the previous level.
6302 struct parsefile *pf;
6304 parsefile->nleft = parsenleft;
6305 parsefile->lleft = parselleft;
6306 parsefile->nextc = parsenextc;
6307 parsefile->linno = plinno;
6308 pf = (struct parsefile *)ckmalloc(sizeof (struct parsefile));
6309 pf->prev = parsefile;
6312 pf->basestrpush.prev = NULL;
6320 struct parsefile *pf = parsefile;
6329 parsefile = pf->prev;
6331 parsenleft = parsefile->nleft;
6332 parselleft = parsefile->lleft;
6333 parsenextc = parsefile->nextc;
6334 plinno = parsefile->linno;
6340 * Return to top level.
6346 while (parsefile != &basepf)
6352 * Close the file(s) that the shell is reading commands from. Called
6353 * after a fork is done.
6360 if (parsefile->fd > 0) {
6361 close(parsefile->fd);
6366 /* $NetBSD: jobs.c,v 1.56 2002/11/25 12:13:03 agc Exp $ */
6368 /* mode flags for set_curjob */
6369 #define CUR_DELETE 2
6370 #define CUR_RUNNING 1
6371 #define CUR_STOPPED 0
6373 /* mode flags for dowait */
6374 #define DOWAIT_NORMAL 0
6375 #define DOWAIT_BLOCK 1
6378 static struct job *jobtab;
6380 static unsigned njobs;
6382 /* pgrp of shell on invocation */
6383 static int initialpgrp;
6384 static int ttyfd = -1;
6387 static struct job *curjob;
6388 /* number of presumed living untracked jobs */
6391 static void set_curjob(struct job *, unsigned);
6393 static int restartjob(struct job *, int);
6394 static void xtcsetpgrp(int, pid_t);
6395 static char *commandtext(union node *);
6396 static void cmdlist(union node *, int);
6397 static void cmdtxt(union node *);
6398 static void cmdputs(const char *);
6399 static void showpipe(struct job *, FILE *);
6401 static int sprint_status(char *, int, int);
6402 static void freejob(struct job *);
6403 static struct job *getjob(const char *, int);
6404 static struct job *growjobtab(void);
6405 static void forkchild(struct job *, union node *, int);
6406 static void forkparent(struct job *, union node *, int, pid_t);
6407 static int dowait(int, struct job *);
6408 static int getstatus(struct job *);
6411 set_curjob(struct job *jp, unsigned mode)
6414 struct job **jpp, **curp;
6416 /* first remove from list */
6417 jpp = curp = &curjob;
6422 jpp = &jp1->prev_job;
6424 *jpp = jp1->prev_job;
6426 /* Then re-insert in correct position */
6434 /* job being deleted */
6437 /* newly created job or backgrounded job,
6438 put after all stopped jobs. */
6442 if (!jp1 || jp1->state != JOBSTOPPED)
6445 jpp = &jp1->prev_job;
6451 /* newly stopped job - becomes curjob */
6452 jp->prev_job = *jpp;
6460 * Turn job control on and off.
6462 * Note: This code assumes that the third arg to ioctl is a character
6463 * pointer, which is true on Berkeley systems but not System V. Since
6464 * System V doesn't have job control yet, this isn't a problem now.
6466 * Called with interrupts off.
6475 if (on == jobctl || rootshell == 0)
6479 ofd = fd = open(_PATH_TTY, O_RDWR);
6482 while (!isatty(fd) && --fd >= 0)
6485 fd = fcntl(fd, F_DUPFD, 10);
6489 fcntl(fd, F_SETFD, FD_CLOEXEC);
6490 do { /* while we are in the background */
6491 if ((pgrp = tcgetpgrp(fd)) < 0) {
6493 sh_warnx("can't access tty; job control turned off");
6497 if (pgrp == getpgrp())
6508 xtcsetpgrp(fd, pgrp);
6510 /* turning job control off */
6513 xtcsetpgrp(fd, pgrp);
6527 killcmd(int argc, char **argv)
6538 "Usage: kill [-s sigspec | -signum | -sigspec] [pid | job]... or\n"
6539 "kill -l [exitstatus]"
6543 if (**++argv == '-') {
6544 signo = decode_signal(*argv + 1, 1);
6548 while ((c = nextopt("ls:")) != '\0')
6558 signo = decode_signal(optionarg, 1);
6561 "invalid signal number or name: %s",
6572 if (!list && signo < 0)
6575 if ((signo < 0 || !*argv) ^ list) {
6583 for (i = 1; i < NSIG; i++) {
6584 name = u_signal_names(0, &i, 1);
6586 out1fmt(snlfmt, name);
6590 name = u_signal_names(*argptr, &signo, -1);
6592 out1fmt(snlfmt, name);
6594 error("invalid signal number or exit status: %s", *argptr);
6600 if (**argv == '%') {
6601 jp = getjob(*argv, 0);
6602 pid = -jp->ps[0].pid;
6604 pid = number(*argv);
6605 if (kill(pid, signo) != 0) {
6615 #if defined(JOBS) || defined(DEBUG)
6617 jobno(const struct job *jp)
6619 return jp - jobtab + 1;
6625 fgcmd(int argc, char **argv)
6632 mode = (**argv == 'f') ? FORK_FG : FORK_BG;
6637 jp = getjob(*argv, 1);
6638 if (mode == FORK_BG) {
6639 set_curjob(jp, CUR_RUNNING);
6640 fprintf(out, "[%d] ", jobno(jp));
6642 outstr(jp->ps->cmd, out);
6644 retval = restartjob(jp, mode);
6645 } while (*argv && *++argv);
6649 static int bgcmd(int, char **) __attribute__((__alias__("fgcmd")));
6653 restartjob(struct job *jp, int mode)
6655 struct procstat *ps;
6661 if (jp->state == JOBDONE)
6663 jp->state = JOBRUNNING;
6665 if (mode == FORK_FG)
6666 xtcsetpgrp(ttyfd, pgid);
6667 killpg(pgid, SIGCONT);
6671 if (WIFSTOPPED(ps->status)) {
6674 } while (ps++, --i);
6676 status = (mode == FORK_FG) ? waitforjob(jp) : 0;
6683 sprint_status(char *s, int status, int sigonly)
6689 if (!WIFEXITED(status)) {
6691 if (WIFSTOPPED(status))
6692 st = WSTOPSIG(status);
6695 st = WTERMSIG(status);
6697 if (st == SIGINT || st == SIGPIPE)
6700 if (WIFSTOPPED(status))
6705 col = fmtstr(s, 32, strsignal(st));
6706 if (WCOREDUMP(status)) {
6707 col += fmtstr(s + col, 16, " (core dumped)");
6709 } else if (!sigonly) {
6710 st = WEXITSTATUS(status);
6712 col = fmtstr(s, 16, "Done(%d)", st);
6714 col = fmtstr(s, 16, "Done");
6723 showjob(FILE *out, struct job *jp, int mode)
6725 struct procstat *ps;
6726 struct procstat *psend;
6733 if (mode & SHOW_PGID) {
6734 /* just output process (group) id of pipeline */
6735 fprintf(out, "%d\n", ps->pid);
6739 col = fmtstr(s, 16, "[%d] ", jobno(jp));
6744 else if (curjob && jp == curjob->prev_job)
6747 if (mode & SHOW_PID)
6748 col += fmtstr(s + col, 16, "%d ", ps->pid);
6750 psend = ps + jp->nprocs;
6752 if (jp->state == JOBRUNNING) {
6753 scopy("Running", s + col);
6754 col += strlen("Running");
6756 int status = psend[-1].status;
6758 if (jp->state == JOBSTOPPED)
6759 status = jp->stopstatus;
6761 col += sprint_status(s + col, status, 0);
6767 /* for each process */
6768 col = fmtstr(s, 48, " |\n%*c%d ", indent, ' ', ps->pid) - 3;
6771 fprintf(out, "%s%*c%s",
6772 s, 33 - col >= 0 ? 33 - col : 0, ' ', ps->cmd
6774 if (!(mode & SHOW_PID)) {
6778 if (++ps == psend) {
6779 outcslow('\n', out);
6786 if (jp->state == JOBDONE) {
6787 TRACE(("showjob: freeing job %d\n", jobno(jp)));
6794 jobscmd(int argc, char **argv)
6800 while ((m = nextopt("lp")))
6810 showjob(out, getjob(*argv,0), mode);
6813 showjobs(out, mode);
6820 * Print a list of jobs. If "change" is nonzero, only print jobs whose
6821 * statuses have changed since the last call to showjobs.
6825 showjobs(FILE *out, int mode)
6829 TRACE(("showjobs(%x) called\n", mode));
6831 /* If not even one one job changed, there is nothing to do */
6832 while (dowait(DOWAIT_NORMAL, NULL) > 0)
6835 for (jp = curjob; jp; jp = jp->prev_job) {
6836 if (!(mode & SHOW_CHANGED) || jp->changed)
6837 showjob(out, jp, mode);
6843 * Mark a job structure as unused.
6847 freejob(struct job *jp)
6849 struct procstat *ps;
6853 for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) {
6854 if (ps->cmd != nullstr)
6857 if (jp->ps != &jp->ps0)
6860 set_curjob(jp, CUR_DELETE);
6866 waitcmd(int argc, char **argv)
6879 /* wait for all jobs */
6884 /* no running procs */
6887 if (jp->state == JOBRUNNING)
6892 dowait(DOWAIT_BLOCK, 0);
6898 if (**argv != '%') {
6899 pid_t pid = number(*argv);
6903 if (job->ps[job->nprocs - 1].pid == pid)
6905 job = job->prev_job;
6911 job = getjob(*argv, 0);
6912 /* loop until process terminated or stopped */
6913 while (job->state == JOBRUNNING)
6914 dowait(DOWAIT_BLOCK, 0);
6916 retval = getstatus(job);
6927 * Convert a job name to a job structure.
6931 getjob(const char *name, int getctl)
6935 const char *err_msg = "No such job: %s";
6939 char *(*match)(const char *, const char *);
6954 if (c == '+' || c == '%') {
6956 err_msg = "No current job";
6958 } else if (c == '-') {
6961 err_msg = "No previous job";
6972 jp = jobtab + num - 1;
6989 if (match(jp->ps[0].cmd, p)) {
6993 err_msg = "%s: ambiguous";
7000 err_msg = "job %s not created under job control";
7001 if (getctl && jp->jobctl == 0)
7006 error(err_msg, name);
7011 * Return a new job structure.
7012 * Called with interrupts off.
7016 makejob(union node *node, int nprocs)
7021 for (i = njobs, jp = jobtab ; ; jp++) {
7028 if (jp->state != JOBDONE || !jp->waited)
7037 memset(jp, 0, sizeof(*jp));
7042 jp->prev_job = curjob;
7047 jp->ps = ckmalloc(nprocs * sizeof (struct procstat));
7049 TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs,
7059 struct job *jp, *jq;
7061 len = njobs * sizeof(*jp);
7063 jp = ckrealloc(jq, len + 4 * sizeof(*jp));
7065 offset = (char *)jp - (char *)jq;
7067 /* Relocate pointers */
7070 jq = (struct job *)((char *)jq + l);
7074 #define joff(p) ((struct job *)((char *)(p) + l))
7075 #define jmove(p) (p) = (void *)((char *)(p) + offset)
7076 if (likely(joff(jp)->ps == &jq->ps0))
7077 jmove(joff(jp)->ps);
7078 if (joff(jp)->prev_job)
7079 jmove(joff(jp)->prev_job);
7089 jp = (struct job *)((char *)jp + len);
7093 } while (--jq >= jp);
7099 * Fork off a subshell. If we are doing job control, give the subshell its
7100 * own process group. Jp is a job structure that the job is to be added to.
7101 * N is the command that will be evaluated by the child. Both jp and n may
7102 * be NULL. The mode parameter can be one of the following:
7103 * FORK_FG - Fork off a foreground process.
7104 * FORK_BG - Fork off a background process.
7105 * FORK_NOJOB - Like FORK_FG, but don't give the process its own
7106 * process group even if job control is on.
7108 * When job control is turned off, background processes have their standard
7109 * input redirected to /dev/null (except for the second and later processes
7112 * Called with interrupts off.
7116 forkchild(struct job *jp, union node *n, int mode)
7120 TRACE(("Child shell %d\n", getpid()));
7121 wasroot = rootshell;
7127 /* do job control only in root shell */
7129 if (mode != FORK_NOJOB && jp->jobctl && wasroot) {
7132 if (jp->nprocs == 0)
7135 pgrp = jp->ps[0].pid;
7136 /* This can fail because we are doing it in the parent also */
7137 (void)setpgid(0, pgrp);
7138 if (mode == FORK_FG)
7139 xtcsetpgrp(ttyfd, pgrp);
7144 if (mode == FORK_BG) {
7147 if (jp->nprocs == 0) {
7149 if (open(_PATH_DEVNULL, O_RDONLY) != 0)
7150 error("Can't open %s", _PATH_DEVNULL);
7153 if (wasroot && iflag) {
7158 for (jp = curjob; jp; jp = jp->prev_job)
7164 forkparent(struct job *jp, union node *n, int mode, pid_t pid)
7166 TRACE(("In parent shell: child = %d\n", pid));
7168 while (jobless && dowait(DOWAIT_NORMAL, 0) > 0);
7173 if (mode != FORK_NOJOB && jp->jobctl) {
7176 if (jp->nprocs == 0)
7179 pgrp = jp->ps[0].pid;
7180 /* This can fail because we are doing it in the child also */
7181 (void)setpgid(pid, pgrp);
7184 if (mode == FORK_BG) {
7185 backgndpid = pid; /* set $! */
7186 set_curjob(jp, CUR_RUNNING);
7189 struct procstat *ps = &jp->ps[jp->nprocs++];
7195 ps->cmd = commandtext(n);
7201 forkshell(struct job *jp, union node *n, int mode)
7205 TRACE(("forkshell(%%%d, %p, %d) called\n", jobno(jp), n, mode));
7208 TRACE(("Fork failed, errno=%d", errno));
7211 error("Cannot fork");
7214 forkchild(jp, n, mode);
7216 forkparent(jp, n, mode, pid);
7221 * Wait for job to finish.
7223 * Under job control we have the problem that while a child process is
7224 * running interrupts generated by the user are sent to the child but not
7225 * to the shell. This means that an infinite loop started by an inter-
7226 * active user may be hard to kill. With job control turned off, an
7227 * interactive user may place an interactive program inside a loop. If
7228 * the interactive program catches interrupts, the user doesn't want
7229 * these interrupts to also abort the loop. The approach we take here
7230 * is to have the shell ignore interrupt signals while waiting for a
7231 * forground process to terminate, and then send itself an interrupt
7232 * signal if the child process was terminated by an interrupt signal.
7233 * Unfortunately, some programs want to do a bit of cleanup and then
7234 * exit on interrupt; unless these processes terminate themselves by
7235 * sending a signal to themselves (instead of calling exit) they will
7236 * confuse this approach.
7238 * Called with interrupts off.
7242 waitforjob(struct job *jp)
7246 TRACE(("waitforjob(%%%d) called\n", jobno(jp)));
7247 while (jp->state == JOBRUNNING) {
7248 dowait(DOWAIT_BLOCK, jp);
7253 xtcsetpgrp(ttyfd, rootpid);
7255 * This is truly gross.
7256 * If we're doing job control, then we did a TIOCSPGRP which
7257 * caused us (the shell) to no longer be in the controlling
7258 * session -- so we wouldn't have seen any ^C/SIGINT. So, we
7259 * intuit from the subprocess exit status whether a SIGINT
7260 * occurred, and if so interrupt ourselves. Yuck. - mycroft
7265 if (jp->state == JOBDONE)
7273 * Do a wait system call. If job control is compiled in, we accept
7274 * stopped processes. If block is zero, we return a value of zero
7275 * rather than blocking.
7277 * System V doesn't have a non-blocking wait system call. It does
7278 * have a SIGCLD signal that is sent to a process when one of it's
7279 * children dies. The obvious way to use SIGCLD would be to install
7280 * a handler for SIGCLD which simply bumped a counter when a SIGCLD
7281 * was received, and have waitproc bump another counter when it got
7282 * the status of a process. Waitproc would then know that a wait
7283 * system call would not block if the two counters were different.
7284 * This approach doesn't work because if a process has children that
7285 * have not been waited for, System V will send it a SIGCLD when it
7286 * installs a signal handler for SIGCLD. What this means is that when
7287 * a child exits, the shell will be sent SIGCLD signals continuously
7288 * until is runs out of stack space, unless it does a wait call before
7289 * restoring the signal handler. The code below takes advantage of
7290 * this (mis)feature by installing a signal handler for SIGCLD and
7291 * then checking to see whether it was called. If there are any
7292 * children to be waited for, it will be.
7294 * If neither SYSV nor BSD is defined, we don't implement nonblocking
7295 * waits at all. In this case, the user will not be informed when
7296 * a background process until the next time she runs a real program
7297 * (as opposed to running a builtin command or just typing return),
7298 * and the jobs command may give out of date information.
7302 waitproc(int block, int *status)
7312 return wait3(status, flags, (struct rusage *)NULL);
7316 * Wait for a process to terminate.
7320 dowait(int block, struct job *job)
7325 struct job *thisjob;
7328 TRACE(("dowait(%d) called\n", block));
7329 pid = waitproc(block, &status);
7330 TRACE(("wait returns pid %d, status=%d\n", pid, status));
7335 for (jp = curjob; jp; jp = jp->prev_job) {
7336 struct procstat *sp;
7337 struct procstat *spend;
7338 if (jp->state == JOBDONE)
7341 spend = jp->ps + jp->nprocs;
7344 if (sp->pid == pid) {
7345 TRACE(("Job %d: changing status of proc %d from 0x%x to 0x%x\n", jobno(jp), pid, sp->status, status));
7346 sp->status = status;
7349 if (sp->status == -1)
7352 if (state == JOBRUNNING)
7354 if (WIFSTOPPED(sp->status)) {
7355 jp->stopstatus = sp->status;
7359 } while (++sp < spend);
7364 if (!WIFSTOPPED(status))
7371 if (state != JOBRUNNING) {
7372 thisjob->changed = 1;
7374 if (thisjob->state != state) {
7375 TRACE(("Job %d: changing state from %d to %d\n", jobno(thisjob), thisjob->state, state));
7376 thisjob->state = state;
7378 if (state == JOBSTOPPED) {
7379 set_curjob(thisjob, CUR_STOPPED);
7388 if (thisjob && thisjob == job) {
7392 len = sprint_status(s, status, 1);
7404 * return 1 if there are stopped jobs, otherwise 0
7417 if (jp && jp->state == JOBSTOPPED) {
7418 out2str("You have stopped jobs.\n");
7428 * Return a string identifying a command (to be printed by the
7433 static char *cmdnextc;
7436 commandtext(union node *n)
7440 STARTSTACKSTR(cmdnextc);
7442 name = stackblock();
7443 TRACE(("commandtext: name %p, end %p\n\t\"%s\"\n",
7444 name, cmdnextc, cmdnextc));
7445 return savestr(name);
7449 cmdtxt(union node *n)
7452 struct nodelist *lp;
7464 lp = n->npipe.cmdlist;
7482 cmdtxt(n->nbinary.ch1);
7498 cmdtxt(n->nif.test);
7501 if (n->nif.elsepart) {
7504 n = n->nif.elsepart;
7520 cmdtxt(n->nbinary.ch1);
7530 cmdputs(n->nfor.var);
7532 cmdlist(n->nfor.args, 1);
7537 cmdputs(n->narg.text);
7541 cmdlist(n->ncmd.args, 1);
7542 cmdlist(n->ncmd.redirect, 0);
7555 cmdputs(n->ncase.expr->narg.text);
7557 for (np = n->ncase.cases; np; np = np->nclist.next) {
7558 cmdtxt(np->nclist.pattern);
7560 cmdtxt(np->nclist.body);
7586 s[0] = n->nfile.fd + '0';
7590 if (n->type == NTOFD || n->type == NFROMFD) {
7591 s[0] = n->ndup.dupfd + '0';
7602 cmdlist(union node *np, int sep)
7604 for (; np; np = np->narg.next) {
7608 if (sep && np->narg.next)
7614 cmdputs(const char *s)
7616 const char *p, *str;
7617 char c, cc[2] = " ";
7621 static const char *const vstype[16] = {
7622 nullstr, "}", "-", "+", "?", "=",
7623 "%", "%%", "#", "##", nullstr
7626 nextc = makestrspace((strlen(s) + 1) * 8, cmdnextc);
7628 while ((c = *p++) != 0) {
7636 if ((subtype & VSTYPE) == VSLENGTH)
7640 if (!(subtype & VSQUOTE) != !(quoted & 1)) {
7658 case CTLBACKQ+CTLQUOTE:
7661 #ifdef CONFIG_ASH_MATH_SUPPORT
7676 str = vstype[subtype & VSTYPE];
7677 if (subtype & VSNUL)
7688 /* These can only happen inside quotes */
7700 while ((c = *str++)) {
7705 USTPUTC('"', nextc);
7713 showpipe(struct job *jp, FILE *out)
7715 struct procstat *sp;
7716 struct procstat *spend;
7718 spend = jp->ps + jp->nprocs;
7719 for (sp = jp->ps + 1; sp < spend; sp++)
7720 fprintf(out, " | %s", sp->cmd);
7721 outcslow('\n', out);
7726 xtcsetpgrp(int fd, pid_t pgrp)
7728 if (tcsetpgrp(fd, pgrp))
7729 error("Cannot set tty process group (%m)");
7734 getstatus(struct job *job) {
7738 status = job->ps[job->nprocs - 1].status;
7739 retval = WEXITSTATUS(status);
7740 if (!WIFEXITED(status)) {
7742 retval = WSTOPSIG(status);
7743 if (!WIFSTOPPED(status))
7746 /* XXX: limits number of signals */
7747 retval = WTERMSIG(status);
7749 if (retval == SIGINT)
7755 TRACE(("getstatus: job %d, nproc %d, status %x, retval %x\n",
7756 jobno(job), job->nprocs, status, retval));
7760 #ifdef CONFIG_ASH_MAIL
7761 /* $NetBSD: mail.c,v 1.15 2002/11/24 22:35:40 christos Exp $ */
7764 * Routines to check for mail. (Perhaps make part of main.c?)
7767 #define MAXMBOXES 10
7769 /* times of mailboxes */
7770 static time_t mailtime[MAXMBOXES];
7771 /* Set if MAIL or MAILPATH is changed. */
7772 static int mail_var_path_changed;
7777 * Print appropriate message(s) if mail has arrived.
7778 * If mail_var_path_changed is set,
7779 * then the value of MAIL has mail_var_path_changed,
7780 * so we just update the values.
7790 struct stackmark smark;
7793 setstackmark(&smark);
7794 mpath = mpathset() ? mpathval() : mailval();
7795 for (mtp = mailtime; mtp < mailtime + MAXMBOXES; mtp++) {
7796 p = padvance(&mpath, nullstr);
7801 for (q = p ; *q ; q++);
7806 q[-1] = '\0'; /* delete trailing '/' */
7807 if (stat(p, &statb) < 0) {
7811 if (!mail_var_path_changed && statb.st_mtime != *mtp) {
7814 pathopt ? pathopt : "you have mail"
7817 *mtp = statb.st_mtime;
7819 mail_var_path_changed = 0;
7820 popstackmark(&smark);
7825 changemail(const char *val)
7827 mail_var_path_changed++;
7830 #endif /* CONFIG_ASH_MAIL */
7832 /* $NetBSD: main.c,v 1.46 2002/12/11 19:12:18 christos Exp $ */
7836 static short profile_buf[16384];
7840 static int isloginsh;
7842 static void read_profile(const char *);
7845 * Main routine. We initialize things, parse the arguments, execute
7846 * profiles if we're a login shell, and then call cmdloop to execute
7847 * commands. The setjmp call sets up the location to jump to when an
7848 * exception occurs. When an exception occurs the variable "state"
7849 * is used to figure out how far we had gotten.
7853 ash_main(int argc, char **argv)
7857 struct jmploc jmploc;
7858 struct stackmark smark;
7861 dash_errno = __errno_location();
7865 monitor(4, etext, profile_buf, sizeof profile_buf, 50);
7868 if (setjmp(jmploc.loc)) {
7875 switch (exception) {
7885 status = exitstatus;
7888 exitstatus = status;
7890 if (e == EXEXIT || state == 0 || iflag == 0 || ! rootshell)
7894 outcslow('\n', stderr);
7896 popstackmark(&smark);
7897 FORCEINTON; /* enable interrupts */
7900 else if (state == 2)
7902 else if (state == 3)
7910 trputs("Shell args: "); trargs(argv);
7914 #ifdef CONFIG_ASH_RANDOM_SUPPORT
7915 rseed = rootpid + ((time_t)time((time_t *)0));
7919 setstackmark(&smark);
7920 procargs(argc, argv);
7921 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
7923 const char *hp = lookupvar("HISTFILE");
7926 hp = lookupvar("HOME");
7928 char *defhp = concat_path_file(hp, ".ash_history");
7929 setvar("HISTFILE", defhp, 0);
7935 if (argv[0] && argv[0][0] == '-')
7939 read_profile("/etc/profile");
7942 read_profile(".profile");
7948 getuid() == geteuid() && getgid() == getegid() &&
7952 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
7953 read_profile(shinit);
7961 if (sflag || minusc == NULL) {
7962 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
7964 const char *hp = lookupvar("HISTFILE");
7967 load_history ( hp );
7970 state4: /* XXX ??? - why isn't this before the "if" statement */
7978 extern void _mcleanup(void);
7988 * Read and execute commands. "Top" is nonzero for the top level command
7989 * loop; it turns on prompting if the shell is interactive.
7996 struct stackmark smark;
8000 TRACE(("cmdloop(%d) called\n", top));
8002 setstackmark(&smark);
8007 showjobs(stderr, SHOW_CHANGED);
8012 #ifdef CONFIG_ASH_MAIL
8016 n = parsecmd(inter);
8017 /* showtree(n); DEBUG */
8019 if (!top || numeof >= 50)
8021 if (!stoppedjobs()) {
8024 out2str("\nUse \"exit\" to leave shell.\n");
8027 } else if (n != NULL && nflag == 0) {
8028 job_warning = (job_warning == 2) ? 1 : 0;
8032 popstackmark(&smark);
8042 * Read /etc/profile or .profile. Return on error.
8046 read_profile(const char *name)
8053 if ((fd = open(name, O_RDONLY)) >= 0)
8058 /* -q turns off -x and -v just when executing init files */
8061 xflag = 0, xflag_set = 1;
8063 vflag = 0, vflag_set = 1;
8077 * Read a file containing shell functions.
8081 readcmdfile(char *name)
8086 if ((fd = open(name, O_RDONLY)) >= 0)
8089 error("Can't open %s", name);
8097 * Take commands from a file. To be compatible we should do a path
8098 * search for the file, which is necessary to find sub-commands.
8101 static inline char *
8102 find_dot_file(char *name)
8105 const char *path = pathval();
8108 /* don't try this for absolute or relative paths */
8109 if (strchr(name, '/'))
8112 while ((fullname = padvance(&path, name)) != NULL) {
8113 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
8115 * Don't bother freeing here, since it will
8116 * be freed by the caller.
8120 stunalloc(fullname);
8123 /* not found in the PATH */
8124 error(not_found_msg, name);
8129 dotcmd(int argc, char **argv)
8133 if (argc >= 2) { /* That's what SVR2 does */
8135 struct stackmark smark;
8137 setstackmark(&smark);
8138 fullname = find_dot_file(argv[1]);
8139 setinputfile(fullname, 1);
8140 commandname = fullname;
8143 popstackmark(&smark);
8150 exitcmd(int argc, char **argv)
8155 exitstatus = number(argv[1]);
8160 /* $NetBSD: memalloc.c,v 1.27 2003/01/22 20:36:04 dsl Exp $ */
8163 * Same for malloc, realloc, but returns an error when out of space.
8167 ckrealloc(pointer p, size_t nbytes)
8169 p = realloc(p, nbytes);
8171 error(bb_msg_memory_exhausted);
8176 ckmalloc(size_t nbytes)
8178 return ckrealloc(NULL, nbytes);
8182 * Make a copy of a string in safe storage.
8186 savestr(const char *s)
8188 char *p = strdup(s);
8190 error(bb_msg_memory_exhausted);
8196 * Parse trees for commands are allocated in lifo order, so we use a stack
8197 * to make this more efficient, and also to avoid all sorts of exception
8198 * handling code to handle interrupts in the middle of a parse.
8200 * The size 504 was chosen because the Ultrix malloc handles that size
8206 stalloc(size_t nbytes)
8211 aligned = SHELL_ALIGN(nbytes);
8212 if (aligned > stacknleft) {
8215 struct stack_block *sp;
8217 blocksize = aligned;
8218 if (blocksize < MINSIZE)
8219 blocksize = MINSIZE;
8220 len = sizeof(struct stack_block) - MINSIZE + blocksize;
8221 if (len < blocksize)
8222 error(bb_msg_memory_exhausted);
8226 stacknxt = sp->space;
8227 stacknleft = blocksize;
8228 sstrend = stacknxt + blocksize;
8233 stacknxt += aligned;
8234 stacknleft -= aligned;
8240 stunalloc(pointer p)
8243 if (!p || (stacknxt < (char *)p) || ((char *)p < stackp->space)) {
8244 write(2, "stunalloc\n", 10);
8248 stacknleft += stacknxt - (char *)p;
8254 setstackmark(struct stackmark *mark)
8256 mark->stackp = stackp;
8257 mark->stacknxt = stacknxt;
8258 mark->stacknleft = stacknleft;
8259 mark->marknext = markp;
8265 popstackmark(struct stackmark *mark)
8267 struct stack_block *sp;
8270 markp = mark->marknext;
8271 while (stackp != mark->stackp) {
8276 stacknxt = mark->stacknxt;
8277 stacknleft = mark->stacknleft;
8278 sstrend = mark->stacknxt + mark->stacknleft;
8284 * When the parser reads in a string, it wants to stick the string on the
8285 * stack and only adjust the stack pointer when it knows how big the
8286 * string is. Stackblock (defined in stack.h) returns a pointer to a block
8287 * of space on top of the stack and stackblocklen returns the length of
8288 * this block. Growstackblock will grow this space by at least one byte,
8289 * possibly moving it (like realloc). Grabstackblock actually allocates the
8290 * part of the block that has been used.
8294 growstackblock(void)
8298 newlen = stacknleft * 2;
8299 if (newlen < stacknleft)
8300 error(bb_msg_memory_exhausted);
8304 if (stacknxt == stackp->space && stackp != &stackbase) {
8305 struct stack_block *oldstackp;
8306 struct stackmark *xmark;
8307 struct stack_block *sp;
8308 struct stack_block *prevstackp;
8314 prevstackp = sp->prev;
8315 grosslen = newlen + sizeof(struct stack_block) - MINSIZE;
8316 sp = ckrealloc((pointer)sp, grosslen);
8317 sp->prev = prevstackp;
8319 stacknxt = sp->space;
8320 stacknleft = newlen;
8321 sstrend = sp->space + newlen;
8324 * Stack marks pointing to the start of the old block
8325 * must be relocated to point to the new block
8328 while (xmark != NULL && xmark->stackp == oldstackp) {
8329 xmark->stackp = stackp;
8330 xmark->stacknxt = stacknxt;
8331 xmark->stacknleft = stacknleft;
8332 xmark = xmark->marknext;
8336 char *oldspace = stacknxt;
8337 int oldlen = stacknleft;
8338 char *p = stalloc(newlen);
8340 /* free the space we just allocated */
8341 stacknxt = memcpy(p, oldspace, oldlen);
8342 stacknleft += newlen;
8347 grabstackblock(size_t len)
8349 len = SHELL_ALIGN(len);
8355 * The following routines are somewhat easier to use than the above.
8356 * The user declares a variable of type STACKSTR, which may be declared
8357 * to be a register. The macro STARTSTACKSTR initializes things. Then
8358 * the user uses the macro STPUTC to add characters to the string. In
8359 * effect, STPUTC(c, p) is the same as *p++ = c except that the stack is
8360 * grown as necessary. When the user is done, she can just leave the
8361 * string there and refer to it using stackblock(). Or she can allocate
8362 * the space for it using grabstackstr(). If it is necessary to allow
8363 * someone else to use the stack temporarily and then continue to grow
8364 * the string, the user should use grabstack to allocate the space, and
8365 * then call ungrabstr(p) to return to the previous mode of operation.
8367 * USTPUTC is like STPUTC except that it doesn't check for overflow.
8368 * CHECKSTACKSPACE can be called before USTPUTC to ensure that there
8369 * is space for at least one character.
8375 size_t len = stackblocksize();
8376 if (herefd >= 0 && len >= 1024) {
8377 bb_full_write(herefd, stackblock(), len);
8378 return stackblock();
8381 return stackblock() + len;
8385 * Called from CHECKSTRSPACE.
8389 makestrspace(size_t newlen, char *p)
8391 size_t len = p - stacknxt;
8392 size_t size = stackblocksize();
8397 size = stackblocksize();
8399 if (nleft >= newlen)
8403 return stackblock() + len;
8407 stnputs(const char *s, size_t n, char *p)
8409 p = makestrspace(n, p);
8410 p = mempcpy(p, s, n);
8415 stputs(const char *s, char *p)
8417 return stnputs(s, strlen(s), p);
8420 /* $NetBSD: mystring.c,v 1.15 2002/11/24 22:35:42 christos Exp $ */
8425 * number(s) Convert a string of digits to an integer.
8426 * is_number(s) Return true if s is a string of digits.
8430 * prefix -- see if pfx is a prefix of string.
8434 prefix(const char *string, const char *pfx)
8437 if (*pfx++ != *string++)
8440 return (char *) string;
8445 * Convert a string of digits to an integer, printing an error message on
8450 number(const char *s)
8460 * Check for a valid number. This should be elsewhere.
8464 is_number(const char *p)
8469 } while (*++p != '\0');
8475 * Produce a possibly single quoted string suitable as input to the shell.
8476 * The return string is allocated on the stack.
8480 single_quote(const char *s) {
8489 len = strchrnul(s, '\'') - s;
8491 q = p = makestrspace(len + 3, p);
8494 q = mempcpy(q, s, len);
8500 len = strspn(s, "'");
8504 q = p = makestrspace(len + 3, p);
8507 q = mempcpy(q, s, len);
8516 return stackblock();
8520 * Like strdup but works with the ash stack.
8524 sstrdup(const char *p)
8526 size_t len = strlen(p) + 1;
8527 return memcpy(stalloc(len), p, len);
8532 calcsize(union node *n)
8536 funcblocksize += nodesize[n->type];
8539 calcsize(n->ncmd.redirect);
8540 calcsize(n->ncmd.args);
8541 calcsize(n->ncmd.assign);
8544 sizenodelist(n->npipe.cmdlist);
8549 calcsize(n->nredir.redirect);
8550 calcsize(n->nredir.n);
8557 calcsize(n->nbinary.ch2);
8558 calcsize(n->nbinary.ch1);
8561 calcsize(n->nif.elsepart);
8562 calcsize(n->nif.ifpart);
8563 calcsize(n->nif.test);
8566 funcstringsize += strlen(n->nfor.var) + 1;
8567 calcsize(n->nfor.body);
8568 calcsize(n->nfor.args);
8571 calcsize(n->ncase.cases);
8572 calcsize(n->ncase.expr);
8575 calcsize(n->nclist.body);
8576 calcsize(n->nclist.pattern);
8577 calcsize(n->nclist.next);
8581 sizenodelist(n->narg.backquote);
8582 funcstringsize += strlen(n->narg.text) + 1;
8583 calcsize(n->narg.next);
8590 calcsize(n->nfile.fname);
8591 calcsize(n->nfile.next);
8595 calcsize(n->ndup.vname);
8596 calcsize(n->ndup.next);
8600 calcsize(n->nhere.doc);
8601 calcsize(n->nhere.next);
8604 calcsize(n->nnot.com);
8611 sizenodelist(struct nodelist *lp)
8614 funcblocksize += SHELL_ALIGN(sizeof(struct nodelist));
8622 copynode(union node *n)
8629 funcblock = (char *) funcblock + nodesize[n->type];
8632 new->ncmd.redirect = copynode(n->ncmd.redirect);
8633 new->ncmd.args = copynode(n->ncmd.args);
8634 new->ncmd.assign = copynode(n->ncmd.assign);
8637 new->npipe.cmdlist = copynodelist(n->npipe.cmdlist);
8638 new->npipe.backgnd = n->npipe.backgnd;
8643 new->nredir.redirect = copynode(n->nredir.redirect);
8644 new->nredir.n = copynode(n->nredir.n);
8651 new->nbinary.ch2 = copynode(n->nbinary.ch2);
8652 new->nbinary.ch1 = copynode(n->nbinary.ch1);
8655 new->nif.elsepart = copynode(n->nif.elsepart);
8656 new->nif.ifpart = copynode(n->nif.ifpart);
8657 new->nif.test = copynode(n->nif.test);
8660 new->nfor.var = nodesavestr(n->nfor.var);
8661 new->nfor.body = copynode(n->nfor.body);
8662 new->nfor.args = copynode(n->nfor.args);
8665 new->ncase.cases = copynode(n->ncase.cases);
8666 new->ncase.expr = copynode(n->ncase.expr);
8669 new->nclist.body = copynode(n->nclist.body);
8670 new->nclist.pattern = copynode(n->nclist.pattern);
8671 new->nclist.next = copynode(n->nclist.next);
8675 new->narg.backquote = copynodelist(n->narg.backquote);
8676 new->narg.text = nodesavestr(n->narg.text);
8677 new->narg.next = copynode(n->narg.next);
8684 new->nfile.fname = copynode(n->nfile.fname);
8685 new->nfile.fd = n->nfile.fd;
8686 new->nfile.next = copynode(n->nfile.next);
8690 new->ndup.vname = copynode(n->ndup.vname);
8691 new->ndup.dupfd = n->ndup.dupfd;
8692 new->ndup.fd = n->ndup.fd;
8693 new->ndup.next = copynode(n->ndup.next);
8697 new->nhere.doc = copynode(n->nhere.doc);
8698 new->nhere.fd = n->nhere.fd;
8699 new->nhere.next = copynode(n->nhere.next);
8702 new->nnot.com = copynode(n->nnot.com);
8705 new->type = n->type;
8710 static struct nodelist *
8711 copynodelist(struct nodelist *lp)
8713 struct nodelist *start;
8714 struct nodelist **lpp;
8719 funcblock = (char *) funcblock +
8720 SHELL_ALIGN(sizeof(struct nodelist));
8721 (*lpp)->n = copynode(lp->n);
8723 lpp = &(*lpp)->next;
8731 nodesavestr(char *s)
8733 char *rtn = funcstring;
8735 funcstring = stpcpy(funcstring, s) + 1;
8741 * Free a parse tree.
8745 freefunc(struct funcnode *f)
8747 if (f && --f->count < 0)
8752 static void options(int);
8753 static void setoption(int, int);
8757 * Process the shell command line arguments.
8761 procargs(int argc, char **argv)
8764 const char *xminusc;
8771 for (i = 0; i < NOPTS; i++)
8777 if (*xargv == NULL) {
8779 error("-c requires an argument");
8782 if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
8786 for (i = 0; i < NOPTS; i++)
8787 if (optlist[i] == 2)
8792 /* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
8797 } else if (!sflag) {
8798 setinputfile(*xargv, 0);
8804 shellparam.p = xargv;
8805 #ifdef CONFIG_ASH_GETOPTS
8806 shellparam.optind = 1;
8807 shellparam.optoff = -1;
8809 /* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
8811 shellparam.nparam++;
8824 setinteractive(iflag);
8829 minus_o(char *name, int val)
8834 out1str("Current option settings\n");
8835 for (i = 0; i < NOPTS; i++)
8836 out1fmt("%-16s%s\n", optnames(i),
8837 optlist[i] ? "on" : "off");
8839 for (i = 0; i < NOPTS; i++)
8840 if (equal(name, optnames(i))) {
8844 error("Illegal option -o %s", name);
8849 * Process shell options. The global variable argptr contains a pointer
8850 * to the argument list; we advance it past the options.
8854 options(int cmdline)
8862 while ((p = *argptr) != NULL) {
8864 if ((c = *p++) == '-') {
8866 if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
8868 /* "-" means turn off -x and -v */
8871 /* "--" means reset params */
8872 else if (*argptr == NULL)
8875 break; /* "-" or "--" terminates options */
8877 } else if (c == '+') {
8883 while ((c = *p++) != '\0') {
8884 if (c == 'c' && cmdline) {
8885 minusc = p; /* command is after shell args*/
8886 } else if (c == 'o') {
8887 minus_o(*argptr, val);
8890 } else if (cmdline && (c == '-')) { // long options
8891 if (strcmp(p, "login") == 0)
8903 setoption(int flag, int val)
8907 for (i = 0; i < NOPTS; i++)
8908 if (optletters(i) == flag) {
8912 error("Illegal option -%c", flag);
8919 * Set the shell parameters.
8923 setparam(char **argv)
8929 for (nparam = 0 ; argv[nparam] ; nparam++);
8930 ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
8932 *ap++ = savestr(*argv++);
8935 freeparam(&shellparam);
8936 shellparam.malloc = 1;
8937 shellparam.nparam = nparam;
8938 shellparam.p = newparam;
8939 #ifdef CONFIG_ASH_GETOPTS
8940 shellparam.optind = 1;
8941 shellparam.optoff = -1;
8947 * Free the list of positional parameters.
8951 freeparam(volatile struct shparam *param)
8955 if (param->malloc) {
8956 for (ap = param->p ; *ap ; ap++)
8965 * The shift builtin command.
8969 shiftcmd(int argc, char **argv)
8976 n = number(argv[1]);
8977 if (n > shellparam.nparam)
8978 error("can't shift that many");
8980 shellparam.nparam -= n;
8981 for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
8982 if (shellparam.malloc)
8986 while ((*ap2++ = *ap1++) != NULL);
8987 #ifdef CONFIG_ASH_GETOPTS
8988 shellparam.optind = 1;
8989 shellparam.optoff = -1;
8998 * The set command builtin.
9002 setcmd(int argc, char **argv)
9005 return showvars(nullstr, 0, VUNSET);
9009 if (*argptr != NULL) {
9017 #ifdef CONFIG_ASH_GETOPTS
9022 shellparam.optind = number(value);
9023 shellparam.optoff = -1;
9027 #ifdef CONFIG_LOCALE_SUPPORT
9028 static void change_lc_all(const char *value)
9030 if (value != 0 && *value != 0)
9031 setlocale(LC_ALL, value);
9034 static void change_lc_ctype(const char *value)
9036 if (value != 0 && *value != 0)
9037 setlocale(LC_CTYPE, value);
9042 #ifdef CONFIG_ASH_RANDOM_SUPPORT
9043 /* Roughly copied from bash.. */
9044 static void change_random(const char *value)
9047 /* "get", generate */
9050 rseed = rseed * 1103515245 + 12345;
9051 sprintf(buf, "%d", (unsigned int)((rseed & 32767)));
9052 /* set without recursion */
9053 setvar(vrandom.text, buf, VNOFUNC);
9054 vrandom.flags &= ~VNOFUNC;
9057 rseed = strtoul(value, (char **)NULL, 10);
9063 #ifdef CONFIG_ASH_GETOPTS
9065 getopts(char *optstr, char *optvar, char **optfirst, int *param_optind, int *optoff)
9074 if(*param_optind < 1)
9076 optnext = optfirst + *param_optind - 1;
9078 if (*param_optind <= 1 || *optoff < 0 || strlen(optnext[-1]) < *optoff)
9081 p = optnext[-1] + *optoff;
9082 if (p == NULL || *p == '\0') {
9083 /* Current word is done, advance */
9085 if (p == NULL || *p != '-' || *++p == '\0') {
9092 if (p[0] == '-' && p[1] == '\0') /* check for "--" */
9097 for (q = optstr; *q != c; ) {
9099 if (optstr[0] == ':') {
9102 err |= setvarsafe("OPTARG", s, 0);
9104 fprintf(stderr, "Illegal option -%c\n", c);
9105 (void) unsetvar("OPTARG");
9115 if (*p == '\0' && (p = *optnext) == NULL) {
9116 if (optstr[0] == ':') {
9119 err |= setvarsafe("OPTARG", s, 0);
9122 fprintf(stderr, "No arg for -%c option\n", c);
9123 (void) unsetvar("OPTARG");
9131 err |= setvarsafe("OPTARG", p, 0);
9134 err |= setvarsafe("OPTARG", nullstr, 0);
9137 *optoff = p ? p - *(optnext - 1) : -1;
9138 *param_optind = optnext - optfirst + 1;
9139 fmtstr(s, sizeof(s), "%d", *param_optind);
9140 err |= setvarsafe("OPTIND", s, VNOFUNC);
9143 err |= setvarsafe(optvar, s, 0);
9154 * The getopts builtin. Shellparam.optnext points to the next argument
9155 * to be processed. Shellparam.optptr points to the next character to
9156 * be processed in the current argument. If shellparam.optnext is NULL,
9157 * then it's the first time getopts has been called.
9161 getoptscmd(int argc, char **argv)
9166 error("Usage: getopts optstring var [arg]");
9167 else if (argc == 3) {
9168 optbase = shellparam.p;
9169 if (shellparam.optind > shellparam.nparam + 1) {
9170 shellparam.optind = 1;
9171 shellparam.optoff = -1;
9176 if (shellparam.optind > argc - 2) {
9177 shellparam.optind = 1;
9178 shellparam.optoff = -1;
9182 return getopts(argv[1], argv[2], optbase, &shellparam.optind,
9183 &shellparam.optoff);
9185 #endif /* CONFIG_ASH_GETOPTS */
9188 * XXX - should get rid of. have all builtins use getopt(3). the
9189 * library getopt must have the BSD extension static variable "optreset"
9190 * otherwise it can't be used within the shell safely.
9192 * Standard option processing (a la getopt) for builtin routines. The
9193 * only argument that is passed to nextopt is the option string; the
9194 * other arguments are unnecessary. It return the character, or '\0' on
9199 nextopt(const char *optstring)
9205 if ((p = optptr) == NULL || *p == '\0') {
9207 if (p == NULL || *p != '-' || *++p == '\0')
9210 if (p[0] == '-' && p[1] == '\0') /* check for "--" */
9214 for (q = optstring ; *q != c ; ) {
9216 error("Illegal option -%c", c);
9221 if (*p == '\0' && (p = *argptr++) == NULL)
9222 error("No arg for -%c option", c);
9231 /* $NetBSD: output.c,v 1.27 2002/11/24 22:35:42 christos Exp $ */
9234 outstr(const char *p, FILE *file)
9259 outcslow(int c, FILE *dest)
9269 out1fmt(const char *fmt, ...)
9276 r = vprintf(fmt, ap);
9284 fmtstr(char *outbuf, size_t length, const char *fmt, ...)
9291 ret = vsnprintf(outbuf, length, fmt, ap);
9299 /* $NetBSD: parser.c,v 1.54 2002/11/24 22:35:42 christos Exp $ */
9303 * Shell command parser.
9306 #define EOFMARKLEN 79
9310 struct heredoc *next; /* next here document in list */
9311 union node *here; /* redirection node */
9312 char *eofmark; /* string indicating end of input */
9313 int striptabs; /* if set, strip leading tabs */
9318 static struct heredoc *heredoclist; /* list of here documents to read */
9321 static union node *list(int);
9322 static union node *andor(void);
9323 static union node *pipeline(void);
9324 static union node *command(void);
9325 static union node *simplecmd(void);
9326 static union node *makename(void);
9327 static void parsefname(void);
9328 static void parseheredoc(void);
9329 static char peektoken(void);
9330 static int readtoken(void);
9331 static int xxreadtoken(void);
9332 static int readtoken1(int firstc, int syntax, char *eofmark, int striptabs);
9333 static int noexpand(char *);
9334 static void synexpect(int) __attribute__((__noreturn__));
9335 static void synerror(const char *) __attribute__((__noreturn__));
9336 static void setprompt(int);
9341 isassignment(const char *p)
9343 const char *q = endofname(p);
9351 * Read and parse a command. Returns NEOF on end of file. (NULL is a
9352 * valid parse tree indicating a blank line.)
9356 parsecmd(int interact)
9361 doprompt = interact;
9363 setprompt(doprompt);
9378 union node *n1, *n2, *n3;
9381 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9382 if (nlflag == 2 && peektoken())
9388 if (tok == TBACKGND) {
9389 if (n2->type == NPIPE) {
9390 n2->npipe.backgnd = 1;
9392 if (n2->type != NREDIR) {
9393 n3 = stalloc(sizeof(struct nredir));
9395 n3->nredir.redirect = NULL;
9398 n2->type = NBACKGND;
9405 n3 = (union node *)stalloc(sizeof (struct nbinary));
9407 n3->nbinary.ch1 = n1;
9408 n3->nbinary.ch2 = n2;
9424 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9432 pungetc(); /* push back EOF on input */
9448 union node *n1, *n2, *n3;
9453 if ((t = readtoken()) == TAND) {
9455 } else if (t == TOR) {
9461 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9463 n3 = (union node *)stalloc(sizeof (struct nbinary));
9465 n3->nbinary.ch1 = n1;
9466 n3->nbinary.ch2 = n2;
9476 union node *n1, *n2, *pipenode;
9477 struct nodelist *lp, *prev;
9481 TRACE(("pipeline: entered\n"));
9482 if (readtoken() == TNOT) {
9484 checkkwd = CHKKWD | CHKALIAS;
9488 if (readtoken() == TPIPE) {
9489 pipenode = (union node *)stalloc(sizeof (struct npipe));
9490 pipenode->type = NPIPE;
9491 pipenode->npipe.backgnd = 0;
9492 lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
9493 pipenode->npipe.cmdlist = lp;
9497 lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
9498 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9501 } while (readtoken() == TPIPE);
9507 n2 = (union node *)stalloc(sizeof (struct nnot));
9520 union node *n1, *n2;
9521 union node *ap, **app;
9522 union node *cp, **cpp;
9523 union node *redir, **rpp;
9530 switch (readtoken()) {
9535 n1 = (union node *)stalloc(sizeof (struct nif));
9537 n1->nif.test = list(0);
9538 if (readtoken() != TTHEN)
9540 n1->nif.ifpart = list(0);
9542 while (readtoken() == TELIF) {
9543 n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif));
9544 n2 = n2->nif.elsepart;
9546 n2->nif.test = list(0);
9547 if (readtoken() != TTHEN)
9549 n2->nif.ifpart = list(0);
9551 if (lasttoken == TELSE)
9552 n2->nif.elsepart = list(0);
9554 n2->nif.elsepart = NULL;
9562 n1 = (union node *)stalloc(sizeof (struct nbinary));
9563 n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL;
9564 n1->nbinary.ch1 = list(0);
9565 if ((got=readtoken()) != TDO) {
9566 TRACE(("expecting DO got %s %s\n", tokname(got), got == TWORD ? wordtext : ""));
9569 n1->nbinary.ch2 = list(0);
9574 if (readtoken() != TWORD || quoteflag || ! goodname(wordtext))
9575 synerror("Bad for loop variable");
9576 n1 = (union node *)stalloc(sizeof (struct nfor));
9578 n1->nfor.var = wordtext;
9579 checkkwd = CHKKWD | CHKALIAS;
9580 if (readtoken() == TIN) {
9582 while (readtoken() == TWORD) {
9583 n2 = (union node *)stalloc(sizeof (struct narg));
9585 n2->narg.text = wordtext;
9586 n2->narg.backquote = backquotelist;
9588 app = &n2->narg.next;
9592 if (lasttoken != TNL && lasttoken != TSEMI)
9595 n2 = (union node *)stalloc(sizeof (struct narg));
9597 n2->narg.text = (char *)dolatstr;
9598 n2->narg.backquote = NULL;
9599 n2->narg.next = NULL;
9602 * Newline or semicolon here is optional (but note
9603 * that the original Bourne shell only allowed NL).
9605 if (lasttoken != TNL && lasttoken != TSEMI)
9608 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9609 if (readtoken() != TDO)
9611 n1->nfor.body = list(0);
9615 n1 = (union node *)stalloc(sizeof (struct ncase));
9617 if (readtoken() != TWORD)
9619 n1->ncase.expr = n2 = (union node *)stalloc(sizeof (struct narg));
9621 n2->narg.text = wordtext;
9622 n2->narg.backquote = backquotelist;
9623 n2->narg.next = NULL;
9625 checkkwd = CHKKWD | CHKALIAS;
9626 } while (readtoken() == TNL);
9627 if (lasttoken != TIN)
9629 cpp = &n1->ncase.cases;
9631 checkkwd = CHKNL | CHKKWD;
9634 if (lasttoken == TLP)
9636 *cpp = cp = (union node *)stalloc(sizeof (struct nclist));
9638 app = &cp->nclist.pattern;
9640 *app = ap = (union node *)stalloc(sizeof (struct narg));
9642 ap->narg.text = wordtext;
9643 ap->narg.backquote = backquotelist;
9644 if (readtoken() != TPIPE)
9646 app = &ap->narg.next;
9649 ap->narg.next = NULL;
9650 if (lasttoken != TRP)
9652 cp->nclist.body = list(2);
9654 cpp = &cp->nclist.next;
9656 checkkwd = CHKNL | CHKKWD;
9657 if ((t = readtoken()) != TESAC) {
9659 synexpect(TENDCASE);
9667 n1 = (union node *)stalloc(sizeof (struct nredir));
9668 n1->type = NSUBSHELL;
9669 n1->nredir.n = list(0);
9670 n1->nredir.redirect = NULL;
9683 if (readtoken() != t)
9687 /* Now check for redirection which may follow command */
9688 checkkwd = CHKKWD | CHKALIAS;
9690 while (readtoken() == TREDIR) {
9691 *rpp = n2 = redirnode;
9692 rpp = &n2->nfile.next;
9698 if (n1->type != NSUBSHELL) {
9699 n2 = (union node *)stalloc(sizeof (struct nredir));
9704 n1->nredir.redirect = redir;
9713 union node *args, **app;
9714 union node *n = NULL;
9715 union node *vars, **vpp;
9716 union node **rpp, *redir;
9726 savecheckkwd = CHKALIAS;
9728 checkkwd = savecheckkwd;
9729 switch (readtoken()) {
9731 n = (union node *)stalloc(sizeof (struct narg));
9733 n->narg.text = wordtext;
9734 n->narg.backquote = backquotelist;
9735 if (savecheckkwd && isassignment(wordtext)) {
9737 vpp = &n->narg.next;
9740 app = &n->narg.next;
9745 *rpp = n = redirnode;
9746 rpp = &n->nfile.next;
9747 parsefname(); /* read name of redirection file */
9751 args && app == &args->narg.next &&
9754 struct builtincmd *bcmd;
9757 /* We have a function */
9758 if (readtoken() != TRP)
9760 name = n->narg.text;
9762 !goodname(name) || (
9763 (bcmd = find_builtin(name)) &&
9764 IS_BUILTIN_SPECIAL(bcmd)
9767 synerror("Bad function name");
9769 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9770 n->narg.next = command();
9783 n = (union node *)stalloc(sizeof (struct ncmd));
9785 n->ncmd.args = args;
9786 n->ncmd.assign = vars;
9787 n->ncmd.redirect = redir;
9796 n = (union node *)stalloc(sizeof (struct narg));
9798 n->narg.next = NULL;
9799 n->narg.text = wordtext;
9800 n->narg.backquote = backquotelist;
9804 void fixredir(union node *n, const char *text, int err)
9806 TRACE(("Fix redir %s %d\n", text, err));
9808 n->ndup.vname = NULL;
9810 if (is_digit(text[0]) && text[1] == '\0')
9811 n->ndup.dupfd = digit_val(text[0]);
9812 else if (text[0] == '-' && text[1] == '\0')
9817 synerror("Bad fd number");
9819 n->ndup.vname = makename();
9827 union node *n = redirnode;
9829 if (readtoken() != TWORD)
9831 if (n->type == NHERE) {
9832 struct heredoc *here = heredoc;
9838 TRACE(("Here document %d\n", n->type));
9839 if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN)
9840 synerror("Illegal eof marker for << redirection");
9841 rmescapes(wordtext);
9842 here->eofmark = wordtext;
9844 if (heredoclist == NULL)
9847 for (p = heredoclist ; p->next ; p = p->next);
9850 } else if (n->type == NTOFD || n->type == NFROMFD) {
9851 fixredir(n, wordtext, 0);
9853 n->nfile.fname = makename();
9859 * Input any here documents.
9865 struct heredoc *here;
9876 readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX,
9877 here->eofmark, here->striptabs);
9878 n = (union node *)stalloc(sizeof (struct narg));
9879 n->narg.type = NARG;
9880 n->narg.next = NULL;
9881 n->narg.text = wordtext;
9882 n->narg.backquote = backquotelist;
9883 here->here->nhere.doc = n;
9888 static char peektoken(void)
9894 return tokname_array[t][0];
9902 int alreadyseen = tokpushback;
9905 #ifdef CONFIG_ASH_ALIAS
9914 if (checkkwd & CHKNL) {
9921 if (t != TWORD || quoteflag) {
9926 * check for keywords
9928 if (checkkwd & CHKKWD) {
9929 const char *const *pp;
9931 if ((pp = findkwd(wordtext))) {
9932 lasttoken = t = pp - tokname_array;
9933 TRACE(("keyword %s recognized\n", tokname(t)));
9938 if (checkkwd & CHKALIAS) {
9939 #ifdef CONFIG_ASH_ALIAS
9941 if ((ap = lookupalias(wordtext, 1)) != NULL) {
9943 pushstring(ap->val, ap);
9953 TRACE(("token %s %s\n", tokname(t), t == TWORD ? wordtext : ""));
9955 TRACE(("reread token %s %s\n", tokname(t), t == TWORD ? wordtext : ""));
9962 * Read the next input token.
9963 * If the token is a word, we set backquotelist to the list of cmds in
9964 * backquotes. We set quoteflag to true if any part of the word was
9966 * If the token is TREDIR, then we set redirnode to a structure containing
9968 * In all cases, the variable startlinno is set to the number of the line
9969 * on which the token starts.
9971 * [Change comment: here documents and internal procedures]
9972 * [Readtoken shouldn't have any arguments. Perhaps we should make the
9973 * word parsing code into a separate routine. In this case, readtoken
9974 * doesn't need to have any internal procedures, but parseword does.
9975 * We could also make parseoperator in essence the main routine, and
9976 * have parseword (readtoken1?) handle both words and redirection.]
9979 #define NEW_xxreadtoken
9980 #ifdef NEW_xxreadtoken
9982 /* singles must be first! */
9983 static const char xxreadtoken_chars[7] = { '\n', '(', ')', '&', '|', ';', 0 };
9985 static const char xxreadtoken_tokens[] = {
9986 TNL, TLP, TRP, /* only single occurrence allowed */
9987 TBACKGND, TPIPE, TSEMI, /* if single occurrence */
9988 TEOF, /* corresponds to trailing nul */
9989 TAND, TOR, TENDCASE, /* if double occurrence */
9992 #define xxreadtoken_doubles \
9993 (sizeof(xxreadtoken_tokens) - sizeof(xxreadtoken_chars))
9994 #define xxreadtoken_singles \
9995 (sizeof(xxreadtoken_chars) - xxreadtoken_doubles - 1)
9997 static int xxreadtoken()
10009 startlinno = plinno;
10010 for (;;) { /* until token or start of word found */
10013 if ((c != ' ') && (c != '\t')
10014 #ifdef CONFIG_ASH_ALIAS
10019 while ((c = pgetc()) != '\n' && c != PEOF);
10021 } else if (c == '\\') {
10022 if (pgetc() != '\n') {
10026 startlinno = ++plinno;
10031 = xxreadtoken_chars + sizeof(xxreadtoken_chars) - 1;
10036 needprompt = doprompt;
10039 p = strchr(xxreadtoken_chars, c);
10042 return readtoken1(c, BASESYNTAX, (char *) NULL, 0);
10045 if (p - xxreadtoken_chars >= xxreadtoken_singles) {
10046 if (pgetc() == *p) { /* double occurrence? */
10047 p += xxreadtoken_doubles + 1;
10054 return lasttoken = xxreadtoken_tokens[p - xxreadtoken_chars];
10062 #define RETURN(token) return lasttoken = token
10077 startlinno = plinno;
10078 for (;;) { /* until token or start of word found */
10081 case ' ': case '\t':
10082 #ifdef CONFIG_ASH_ALIAS
10087 while ((c = pgetc()) != '\n' && c != PEOF);
10091 if (pgetc() == '\n') {
10092 startlinno = ++plinno;
10101 needprompt = doprompt;
10106 if (pgetc() == '&')
10111 if (pgetc() == '|')
10116 if (pgetc() == ';')
10129 return readtoken1(c, BASESYNTAX, (char *)NULL, 0);
10132 #endif /* NEW_xxreadtoken */
10136 * If eofmark is NULL, read a word or a redirection symbol. If eofmark
10137 * is not NULL, read a here document. In the latter case, eofmark is the
10138 * word which marks the end of the document and striptabs is true if
10139 * leading tabs should be stripped from the document. The argument firstc
10140 * is the first character of the input token or document.
10142 * Because C does not have internal subroutines, I have simulated them
10143 * using goto's to implement the subroutine linkage. The following macros
10144 * will run code that appears at the end of readtoken1.
10147 #define CHECKEND() {goto checkend; checkend_return:;}
10148 #define PARSEREDIR() {goto parseredir; parseredir_return:;}
10149 #define PARSESUB() {goto parsesub; parsesub_return:;}
10150 #define PARSEBACKQOLD() {oldstyle = 1; goto parsebackq; parsebackq_oldreturn:;}
10151 #define PARSEBACKQNEW() {oldstyle = 0; goto parsebackq; parsebackq_newreturn:;}
10152 #define PARSEARITH() {goto parsearith; parsearith_return:;}
10155 readtoken1(int firstc, int syntax, char *eofmark, int striptabs)
10160 char line[EOFMARKLEN + 1];
10161 struct nodelist *bqlist;
10164 int varnest; /* levels of variables expansion */
10165 int arinest; /* levels of arithmetic expansion */
10166 int parenlevel; /* levels of parens in arithmetic */
10167 int dqvarnest; /* levels of variables expansion within double quotes */
10169 int prevsyntax; /* syntax before arithmetic */
10171 /* Avoid longjmp clobbering */
10177 (void) &parenlevel;
10180 (void) &prevsyntax;
10184 startlinno = plinno;
10186 if (syntax == DQSYNTAX)
10195 STARTSTACKSTR(out);
10196 loop: { /* for each line, until end of word */
10197 CHECKEND(); /* set c to PEOF if at end of here document */
10198 for (;;) { /* until end of line or end of word */
10199 CHECKSTRSPACE(4, out); /* permit 4 calls to USTPUTC */
10200 switch(SIT(c, syntax)) {
10201 case CNL: /* '\n' */
10202 if (syntax == BASESYNTAX)
10203 goto endword; /* exit outer loop */
10209 goto loop; /* continue outer loop */
10214 if (eofmark == NULL || dblquote)
10215 USTPUTC(CTLESC, out);
10218 case CBACK: /* backslash */
10221 USTPUTC(CTLESC, out);
10222 USTPUTC('\\', out);
10224 } else if (c == '\n') {
10230 c != '\\' && c != '`' &&
10236 USTPUTC(CTLESC, out);
10237 USTPUTC('\\', out);
10239 if (SIT(c, SQSYNTAX) == CCTL)
10240 USTPUTC(CTLESC, out);
10248 if (eofmark == NULL) {
10249 USTPUTC(CTLQUOTEMARK, out);
10257 if (eofmark != NULL && arinest == 0 &&
10261 if (dqvarnest == 0) {
10262 syntax = BASESYNTAX;
10269 case CVAR: /* '$' */
10270 PARSESUB(); /* parse substitution */
10272 case CENDVAR: /* '}' */
10275 if (dqvarnest > 0) {
10278 USTPUTC(CTLENDVAR, out);
10283 #ifdef CONFIG_ASH_MATH_SUPPORT
10284 case CLP: /* '(' in arithmetic */
10288 case CRP: /* ')' in arithmetic */
10289 if (parenlevel > 0) {
10293 if (pgetc() == ')') {
10294 if (--arinest == 0) {
10295 USTPUTC(CTLENDARI, out);
10296 syntax = prevsyntax;
10297 if (syntax == DQSYNTAX)
10305 * unbalanced parens
10306 * (don't 2nd guess - no error)
10314 case CBQUOTE: /* '`' */
10318 goto endword; /* exit outer loop */
10323 goto endword; /* exit outer loop */
10324 #ifdef CONFIG_ASH_ALIAS
10334 #ifdef CONFIG_ASH_MATH_SUPPORT
10335 if (syntax == ARISYNTAX)
10336 synerror("Missing '))'");
10338 if (syntax != BASESYNTAX && ! parsebackquote && eofmark == NULL)
10339 synerror("Unterminated quoted string");
10340 if (varnest != 0) {
10341 startlinno = plinno;
10343 synerror("Missing '}'");
10345 USTPUTC('\0', out);
10346 len = out - (char *)stackblock();
10347 out = stackblock();
10348 if (eofmark == NULL) {
10349 if ((c == '>' || c == '<')
10352 && (*out == '\0' || is_digit(*out))) {
10354 return lasttoken = TREDIR;
10359 quoteflag = quotef;
10360 backquotelist = bqlist;
10361 grabstackblock(len);
10363 return lasttoken = TWORD;
10364 /* end of readtoken routine */
10369 * Check to see whether we are at the end of the here document. When this
10370 * is called, c is set to the first character of the next input line. If
10371 * we are at the end of the here document, this routine sets the c to PEOF.
10376 #ifdef CONFIG_ASH_ALIAS
10382 while (c == '\t') {
10386 if (c == *eofmark) {
10387 if (pfgets(line, sizeof line) != NULL) {
10391 for (q = eofmark + 1 ; *q && *p == *q ; p++, q++);
10392 if (*p == '\n' && *q == '\0') {
10395 needprompt = doprompt;
10397 pushstring(line, NULL);
10402 goto checkend_return;
10407 * Parse a redirection operator. The variable "out" points to a string
10408 * specifying the fd to be redirected. The variable "c" contains the
10409 * first character of the redirection operator.
10416 np = (union node *)stalloc(sizeof (struct nfile));
10421 np->type = NAPPEND;
10423 np->type = NCLOBBER;
10430 } else { /* c == '<' */
10432 switch (c = pgetc()) {
10434 if (sizeof (struct nfile) != sizeof (struct nhere)) {
10435 np = (union node *)stalloc(sizeof (struct nhere));
10439 heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc));
10440 heredoc->here = np;
10441 if ((c = pgetc()) == '-') {
10442 heredoc->striptabs = 1;
10444 heredoc->striptabs = 0;
10450 np->type = NFROMFD;
10454 np->type = NFROMTO;
10464 np->nfile.fd = digit_val(fd);
10466 goto parseredir_return;
10471 * Parse a substitution. At this point, we have read the dollar sign
10472 * and nothing else.
10480 static const char types[] = "}-+?=";
10484 c <= PEOA_OR_PEOF ||
10485 (c != '(' && c != '{' && !is_name(c) && !is_special(c))
10489 } else if (c == '(') { /* $(command) or $((arith)) */
10490 if (pgetc() == '(') {
10491 #ifdef CONFIG_ASH_MATH_SUPPORT
10494 synerror("We unsupport $((arith))");
10501 USTPUTC(CTLVAR, out);
10502 typeloc = out - (char *)stackblock();
10503 USTPUTC(VSNORMAL, out);
10504 subtype = VSNORMAL;
10508 if ((c = pgetc()) == '}')
10511 subtype = VSLENGTH;
10516 if (c > PEOA_OR_PEOF && is_name(c)) {
10520 } while (c > PEOA_OR_PEOF && is_in_name(c));
10521 } else if (is_digit(c)) {
10525 } while (is_digit(c));
10527 else if (is_special(c)) {
10532 badsub: synerror("Bad substitution");
10536 if (subtype == 0) {
10543 p = strchr(types, c);
10546 subtype = p - types + VSNORMAL;
10552 subtype = c == '#' ? VSTRIMLEFT :
10565 if (dblquote || arinest)
10567 *((char *)stackblock() + typeloc) = subtype | flags;
10568 if (subtype != VSNORMAL) {
10570 if (dblquote || arinest) {
10575 goto parsesub_return;
10580 * Called to parse command substitutions. Newstyle is set if the command
10581 * is enclosed inside $(...); nlpp is a pointer to the head of the linked
10582 * list of commands (passed by reference), and savelen is the number of
10583 * characters on the top of the stack which must be preserved.
10587 struct nodelist **nlpp;
10590 char *volatile str;
10591 struct jmploc jmploc;
10592 struct jmploc *volatile savehandler;
10596 (void) &saveprompt;
10599 savepbq = parsebackquote;
10600 if (setjmp(jmploc.loc)) {
10603 parsebackquote = 0;
10604 handler = savehandler;
10605 longjmp(handler->loc, 1);
10609 savelen = out - (char *)stackblock();
10611 str = ckmalloc(savelen);
10612 memcpy(str, stackblock(), savelen);
10614 savehandler = handler;
10618 /* We must read until the closing backquote, giving special
10619 treatment to some slashes, and then push the string and
10620 reread it as input, interpreting it normally. */
10627 STARTSTACKSTR(pout);
10633 switch (pc = pgetc()) {
10638 if ((pc = pgetc()) == '\n') {
10643 * If eating a newline, avoid putting
10644 * the newline into the new character
10645 * stream (via the STPUTC after the
10650 if (pc != '\\' && pc != '`' && pc != '$'
10651 && (!dblquote || pc != '"'))
10652 STPUTC('\\', pout);
10653 if (pc > PEOA_OR_PEOF) {
10659 #ifdef CONFIG_ASH_ALIAS
10662 startlinno = plinno;
10663 synerror("EOF in backquote substitution");
10667 needprompt = doprompt;
10676 STPUTC('\0', pout);
10677 psavelen = pout - (char *)stackblock();
10678 if (psavelen > 0) {
10679 pstr = grabstackstr(pout);
10680 setinputstring(pstr);
10685 nlpp = &(*nlpp)->next;
10686 *nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist));
10687 (*nlpp)->next = NULL;
10688 parsebackquote = oldstyle;
10691 saveprompt = doprompt;
10698 doprompt = saveprompt;
10700 if (readtoken() != TRP)
10707 * Start reading from old file again, ignoring any pushed back
10708 * tokens left from the backquote parsing
10713 while (stackblocksize() <= savelen)
10715 STARTSTACKSTR(out);
10717 memcpy(out, str, savelen);
10718 STADJUST(savelen, out);
10724 parsebackquote = savepbq;
10725 handler = savehandler;
10726 if (arinest || dblquote)
10727 USTPUTC(CTLBACKQ | CTLQUOTE, out);
10729 USTPUTC(CTLBACKQ, out);
10731 goto parsebackq_oldreturn;
10733 goto parsebackq_newreturn;
10736 #ifdef CONFIG_ASH_MATH_SUPPORT
10738 * Parse an arithmetic expansion (indicate start of one and set state)
10742 if (++arinest == 1) {
10743 prevsyntax = syntax;
10744 syntax = ARISYNTAX;
10745 USTPUTC(CTLARI, out);
10752 * we collapse embedded arithmetic expansion to
10753 * parenthesis, which should be equivalent
10757 goto parsearith_return;
10761 } /* end of readtoken */
10766 * Returns true if the text contains nothing to expand (no dollar signs
10771 noexpand(char *text)
10777 while ((c = *p++) != '\0') {
10778 if (c == CTLQUOTEMARK)
10782 else if (SIT(c, BASESYNTAX) == CCTL)
10790 * Return of a legal variable name (a letter or underscore followed by zero or
10791 * more letters, underscores, and digits).
10795 endofname(const char *name)
10803 if (! is_in_name(*p))
10811 * Called when an unexpected token is read during the parse. The argument
10812 * is the token that is expected, or -1 if more than one type of token can
10813 * occur at this point.
10816 static void synexpect(int token)
10821 l = sprintf(msg, "%s unexpected", tokname(lasttoken));
10823 sprintf(msg + l, " (expecting %s)", tokname(token));
10829 synerror(const char *msg)
10831 error("Syntax error: %s", msg);
10837 * called by editline -- any expansions to the prompt
10838 * should be added here.
10841 static void setprompt(int whichprompt)
10843 const char *prompt;
10845 switch (whichprompt) {
10859 static const char *const *findkwd(const char *s)
10861 return bsearch(s, tokname_array + KWDOFFSET,
10862 (sizeof(tokname_array) / sizeof(const char *)) - KWDOFFSET,
10863 sizeof(const char *), pstrcmp);
10866 /* $NetBSD: redir.c,v 1.27 2002/11/24 22:35:42 christos Exp $ */
10869 * Code for dealing with input/output redirection.
10872 #define EMPTY -2 /* marks an unused slot in redirtab */
10874 # define PIPESIZE 4096 /* amount of buffering in a pipe */
10876 # define PIPESIZE PIPE_BUF
10880 * Open a file in noclobber mode.
10881 * The code was copied from bash.
10884 noclobberopen(const char *fname)
10887 struct stat finfo, finfo2;
10890 * If the file exists and is a regular file, return an error
10893 r = stat(fname, &finfo);
10894 if (r == 0 && S_ISREG(finfo.st_mode)) {
10900 * If the file was not present (r != 0), make sure we open it
10901 * exclusively so that if it is created before we open it, our open
10902 * will fail. Make sure that we do not truncate an existing file.
10903 * Note that we don't turn on O_EXCL unless the stat failed -- if the
10904 * file was not a regular file, we leave O_EXCL off.
10907 return open(fname, O_WRONLY|O_CREAT|O_EXCL, 0666);
10908 fd = open(fname, O_WRONLY|O_CREAT, 0666);
10910 /* If the open failed, return the file descriptor right away. */
10915 * OK, the open succeeded, but the file may have been changed from a
10916 * non-regular file to a regular file between the stat and the open.
10917 * We are assuming that the O_EXCL open handles the case where FILENAME
10918 * did not exist and is symlinked to an existing file between the stat
10923 * If we can open it and fstat the file descriptor, and neither check
10924 * revealed that it was a regular file, and the file has not been
10925 * replaced, return the file descriptor.
10927 if (fstat(fd, &finfo2) == 0 && !S_ISREG(finfo2.st_mode) &&
10928 finfo.st_dev == finfo2.st_dev && finfo.st_ino == finfo2.st_ino)
10931 /* The file has been replaced. badness. */
10938 * Handle here documents. Normally we fork off a process to write the
10939 * data to a pipe. If the document is short, we can stuff the data in
10940 * the pipe without forking.
10944 openhere(union node *redir)
10950 error("Pipe call failed");
10951 if (redir->type == NHERE) {
10952 len = strlen(redir->nhere.doc->narg.text);
10953 if (len <= PIPESIZE) {
10954 bb_full_write(pip[1], redir->nhere.doc->narg.text, len);
10958 if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
10960 signal(SIGINT, SIG_IGN);
10961 signal(SIGQUIT, SIG_IGN);
10962 signal(SIGHUP, SIG_IGN);
10964 signal(SIGTSTP, SIG_IGN);
10966 signal(SIGPIPE, SIG_DFL);
10967 if (redir->type == NHERE)
10968 bb_full_write(pip[1], redir->nhere.doc->narg.text, len);
10970 expandhere(redir->nhere.doc, pip[1]);
10979 openredirect(union node *redir)
10984 switch (redir->nfile.type) {
10986 fname = redir->nfile.expfname;
10987 if ((f = open(fname, O_RDONLY)) < 0)
10991 fname = redir->nfile.expfname;
10992 if ((f = open(fname, O_RDWR|O_CREAT|O_TRUNC, 0666)) < 0)
10996 /* Take care of noclobber mode. */
10998 fname = redir->nfile.expfname;
10999 if ((f = noclobberopen(fname)) < 0)
11005 fname = redir->nfile.expfname;
11006 if ((f = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
11010 fname = redir->nfile.expfname;
11011 if ((f = open(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0)
11018 /* Fall through to eliminate warning. */
11025 f = openhere(redir);
11031 error("cannot create %s: %s", fname, errmsg(errno, E_CREAT));
11033 error("cannot open %s: %s", fname, errmsg(errno, E_OPEN));
11037 dupredirect(union node *redir, int f)
11039 int fd = redir->nfile.fd;
11041 if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) {
11042 if (redir->ndup.dupfd >= 0) { /* if not ">&-" */
11043 copyfd(redir->ndup.dupfd, fd);
11056 * Process a list of redirection commands. If the REDIR_PUSH flag is set,
11057 * old file descriptors are stashed away so that the redirection can be
11058 * undone by calling popredir. If the REDIR_BACKQ flag is set, then the
11059 * standard output, and the standard error if it becomes a duplicate of
11060 * stdout, is saved in memory.
11064 redirect(union node *redir, int flags)
11067 struct redirtab *sv;
11078 if (flags & REDIR_PUSH) {
11079 struct redirtab *q;
11080 q = ckmalloc(sizeof (struct redirtab));
11081 q->next = redirlist;
11083 q->nullredirs = nullredirs - 1;
11084 for (i = 0 ; i < 10 ; i++)
11085 q->renamed[i] = EMPTY;
11092 if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) &&
11093 n->ndup.dupfd == fd)
11094 continue; /* redirect from/to same file descriptor */
11096 newfd = openredirect(n);
11099 if (sv && *(p = &sv->renamed[fd]) == EMPTY) {
11100 i = fcntl(fd, F_DUPFD, 10);
11107 error("%d: %m", fd);
11117 dupredirect(n, newfd);
11118 } while ((n = n->nfile.next));
11120 if (flags & REDIR_SAVEFD2 && sv && sv->renamed[2] >= 0)
11121 preverrout_fd = sv->renamed[2];
11126 * Undo the effects of the last redirection.
11132 struct redirtab *rp;
11135 if (--nullredirs >= 0)
11139 for (i = 0 ; i < 10 ; i++) {
11140 if (rp->renamed[i] != EMPTY) {
11143 copyfd(rp->renamed[i], i);
11145 close(rp->renamed[i]);
11148 redirlist = rp->next;
11149 nullredirs = rp->nullredirs;
11155 * Undo all redirections. Called on error or interrupt.
11159 * Discard all saved file descriptors.
11163 clearredir(int drop)
11175 * Copy a file descriptor to be >= to. Returns -1
11176 * if the source file descriptor is closed, EMPTY if there are no unused
11177 * file descriptors left.
11181 copyfd(int from, int to)
11185 newfd = fcntl(from, F_DUPFD, to);
11187 if (errno == EMFILE)
11190 error("%d: %m", from);
11197 redirectsafe(union node *redir, int flags)
11200 volatile int saveint;
11201 struct jmploc *volatile savehandler = handler;
11202 struct jmploc jmploc;
11205 if (!(err = setjmp(jmploc.loc) * 2)) {
11207 redirect(redir, flags);
11209 handler = savehandler;
11210 if (err && exception != EXERROR)
11211 longjmp(handler->loc, 1);
11212 RESTOREINT(saveint);
11216 /* $NetBSD: show.c,v 1.24 2003/01/22 20:36:04 dsl Exp $ */
11219 static void shtree(union node *, int, char *, FILE*);
11220 static void shcmd(union node *, FILE *);
11221 static void sharg(union node *, FILE *);
11222 static void indent(int, char *, FILE *);
11223 static void trstring(char *);
11227 showtree(union node *n)
11229 trputs("showtree called\n");
11230 shtree(n, 1, NULL, stdout);
11235 shtree(union node *n, int ind, char *pfx, FILE *fp)
11237 struct nodelist *lp;
11243 indent(ind, pfx, fp);
11254 shtree(n->nbinary.ch1, ind, NULL, fp);
11257 shtree(n->nbinary.ch2, ind, NULL, fp);
11265 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
11270 if (n->npipe.backgnd)
11276 fprintf(fp, "<node type %d>", n->type);
11285 shcmd(union node *cmd, FILE *fp)
11293 for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
11299 for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
11302 switch (np->nfile.type) {
11303 case NTO: s = ">"; dftfd = 1; break;
11304 case NCLOBBER: s = ">|"; dftfd = 1; break;
11305 case NAPPEND: s = ">>"; dftfd = 1; break;
11306 case NTOFD: s = ">&"; dftfd = 1; break;
11307 case NFROM: s = "<"; dftfd = 0; break;
11308 case NFROMFD: s = "<&"; dftfd = 0; break;
11309 case NFROMTO: s = "<>"; dftfd = 0; break;
11310 default: s = "*error*"; dftfd = 0; break;
11312 if (np->nfile.fd != dftfd)
11313 fprintf(fp, "%d", np->nfile.fd);
11315 if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
11316 fprintf(fp, "%d", np->ndup.dupfd);
11318 sharg(np->nfile.fname, fp);
11327 sharg(union node *arg, FILE *fp)
11330 struct nodelist *bqlist;
11333 if (arg->type != NARG) {
11334 out1fmt("<node type %d>\n", arg->type);
11337 bqlist = arg->narg.backquote;
11338 for (p = arg->narg.text ; *p ; p++) {
11347 if (subtype == VSLENGTH)
11353 if (subtype & VSNUL)
11356 switch (subtype & VSTYPE) {
11375 case VSTRIMLEFTMAX:
11382 case VSTRIMRIGHTMAX:
11389 out1fmt("<subtype %d>", subtype);
11396 case CTLBACKQ|CTLQUOTE:
11399 shtree(bqlist->n, -1, NULL, fp);
11411 indent(int amount, char *pfx, FILE *fp)
11415 for (i = 0 ; i < amount ; i++) {
11416 if (pfx && i == amount - 1)
11437 putc(c, tracefile);
11441 trace(const char *fmt, ...)
11448 (void) vfprintf(tracefile, fmt, va);
11453 tracev(const char *fmt, va_list va)
11457 (void) vfprintf(tracefile, fmt, va);
11462 trputs(const char *s)
11466 fputs(s, tracefile);
11478 putc('"', tracefile);
11479 for (p = s ; *p ; p++) {
11481 case '\n': c = 'n'; goto backslash;
11482 case '\t': c = 't'; goto backslash;
11483 case '\r': c = 'r'; goto backslash;
11484 case '"': c = '"'; goto backslash;
11485 case '\\': c = '\\'; goto backslash;
11486 case CTLESC: c = 'e'; goto backslash;
11487 case CTLVAR: c = 'v'; goto backslash;
11488 case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
11489 case CTLBACKQ: c = 'q'; goto backslash;
11490 case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
11491 backslash: putc('\\', tracefile);
11492 putc(c, tracefile);
11495 if (*p >= ' ' && *p <= '~')
11496 putc(*p, tracefile);
11498 putc('\\', tracefile);
11499 putc(*p >> 6 & 03, tracefile);
11500 putc(*p >> 3 & 07, tracefile);
11501 putc(*p & 07, tracefile);
11506 putc('"', tracefile);
11518 putc(' ', tracefile);
11520 putc('\n', tracefile);
11536 /* leave open because libedit might be using it */
11539 scopy("./trace", s);
11541 if (!freopen(s, "a", tracefile)) {
11542 fprintf(stderr, "Can't re-open %s\n", s);
11547 if ((tracefile = fopen(s, "a")) == NULL) {
11548 fprintf(stderr, "Can't open %s\n", s);
11554 if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
11555 fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
11557 setlinebuf(tracefile);
11558 fputs("\nTracing started.\n", tracefile);
11563 /* $NetBSD: trap.c,v 1.28 2002/11/24 22:35:43 christos Exp $ */
11566 * Sigmode records the current value of the signal handlers for the various
11567 * modes. A value of zero means that the current handler is not known.
11568 * S_HARD_IGN indicates that the signal was ignored on entry to the shell,
11571 #define S_DFL 1 /* default signal handling (SIG_DFL) */
11572 #define S_CATCH 2 /* signal is caught */
11573 #define S_IGN 3 /* signal is ignored (SIG_IGN) */
11574 #define S_HARD_IGN 4 /* signal is ignored permenantly */
11575 #define S_RESET 5 /* temporary - to reset a hard ignored sig */
11580 * The trap builtin.
11584 trapcmd(int argc, char **argv)
11593 for (signo = 0 ; signo < NSIG ; signo++) {
11594 if (trap[signo] != NULL) {
11597 sn = u_signal_names(0, &signo, 0);
11600 out1fmt("trap -- %s %s\n",
11601 single_quote(trap[signo]), sn);
11611 if ((signo = decode_signal(*ap, 0)) < 0)
11612 error("%s: bad trap", *ap);
11615 if (action[0] == '-' && action[1] == '\0')
11618 action = savestr(action);
11621 ckfree(trap[signo]);
11622 trap[signo] = action;
11633 * Clear traps on a fork.
11641 for (tp = trap ; tp < &trap[NSIG] ; tp++) {
11642 if (*tp && **tp) { /* trap not NULL or SIG_IGN */
11646 if (tp != &trap[0])
11647 setsignal(tp - trap);
11655 * Set the signal handler for the specified signal. The routine figures
11656 * out what it should be set to.
11660 setsignal(int signo)
11664 struct sigaction act;
11666 if ((t = trap[signo]) == NULL)
11668 else if (*t != '\0')
11672 if (rootshell && action == S_DFL) {
11675 if (iflag || minusc || sflag == 0)
11698 t = &sigmode[signo - 1];
11702 * current setting unknown
11704 if (sigaction(signo, 0, &act) == -1) {
11706 * Pretend it worked; maybe we should give a warning
11707 * here, but other shells don't. We don't alter
11708 * sigmode, so that we retry every time.
11712 if (act.sa_handler == SIG_IGN) {
11713 if (mflag && (signo == SIGTSTP ||
11714 signo == SIGTTIN || signo == SIGTTOU)) {
11715 tsig = S_IGN; /* don't hard ignore these */
11719 tsig = S_RESET; /* force to be set */
11722 if (tsig == S_HARD_IGN || tsig == action)
11726 act.sa_handler = onsig;
11729 act.sa_handler = SIG_IGN;
11732 act.sa_handler = SIG_DFL;
11736 sigfillset(&act.sa_mask);
11737 sigaction(signo, &act, 0);
11745 ignoresig(int signo)
11747 if (sigmode[signo - 1] != S_IGN && sigmode[signo - 1] != S_HARD_IGN) {
11748 signal(signo, SIG_IGN);
11750 sigmode[signo - 1] = S_HARD_IGN;
11761 gotsig[signo - 1] = 1;
11762 pendingsigs = signo;
11764 if (exsig || (signo == SIGINT && !trap[SIGINT])) {
11773 * Called to execute a trap. Perhaps we should avoid entering new trap
11774 * handlers while we are executing a trap handler.
11784 savestatus = exitstatus;
11786 while (pendingsigs = 0, barrier(), (p = memchr(q, 1, NSIG - 1))) {
11788 p = trap[p - q + 1];
11792 exitstatus = savestatus;
11798 * Controls whether the shell is interactive or not.
11802 setinteractive(int on)
11804 static int is_interactive;
11806 if (++on == is_interactive)
11808 is_interactive = on;
11810 setsignal(SIGQUIT);
11811 setsignal(SIGTERM);
11812 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
11813 if(is_interactive > 1) {
11814 /* Looks like they want an interactive shell */
11815 static int do_banner;
11819 "\n\n" BB_BANNER " Built-in shell (ash)\n"
11820 "Enter 'help' for a list of built-in commands.\n\n");
11828 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
11829 /*** List the available builtins ***/
11831 static int helpcmd(int argc, char **argv)
11835 out1fmt("\nBuilt-in commands:\n-------------------\n");
11836 for (col = 0, i = 0; i < NUMBUILTINS; i++) {
11837 col += out1fmt("%c%s", ((col == 0) ? '\t' : ' '),
11838 builtincmd[i].name + 1);
11844 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
11846 extern const struct BB_applet applets[];
11847 extern const size_t NUM_APPLETS;
11849 for (i = 0; i < NUM_APPLETS; i++) {
11851 col += out1fmt("%c%s", ((col == 0) ? '\t' : ' '), applets[i].name);
11860 return EXIT_SUCCESS;
11862 #endif /* CONFIG_FEATURE_SH_EXTRA_QUIET */
11865 * Called to exit the shell.
11876 jmp = setjmp(loc.loc);
11877 status = exitstatus;
11878 TRACE(("pid %d, exitshell(%d)\n", getpid(), status));
11882 if ((p = trap[0]) != NULL && *p != '\0') {
11887 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
11888 if (iflag && rootshell) {
11889 const char *hp = lookupvar("HISTFILE");
11892 save_history ( hp );
11900 static int decode_signal(const char *string, int minsig)
11903 const char *name = u_signal_names(string, &signo, minsig);
11905 return name ? signo : -1;
11908 /* $NetBSD: var.c,v 1.32 2003/01/22 20:36:04 dsl Exp $ */
11910 static struct var *vartab[VTABSIZE];
11912 static int vpcmp(const void *, const void *);
11913 static struct var **findvar(struct var **, const char *);
11916 * Initialize the varable symbol tables and import the environment
11920 #ifdef CONFIG_ASH_GETOPTS
11922 * Safe version of setvar, returns 1 on success 0 on failure.
11926 setvarsafe(const char *name, const char *val, int flags)
11929 volatile int saveint;
11930 struct jmploc *volatile savehandler = handler;
11931 struct jmploc jmploc;
11934 if (setjmp(jmploc.loc))
11938 setvar(name, val, flags);
11941 handler = savehandler;
11942 RESTOREINT(saveint);
11948 * Set the value of a variable. The flags argument is ored with the
11949 * flags of the variable. If val is NULL, the variable is unset.
11953 setvar(const char *name, const char *val, int flags)
11960 q = endofname(name);
11961 p = strchrnul(q, '=');
11962 namelen = p - name;
11963 if (!namelen || p != q)
11964 error("%.*s: bad variable name", namelen, name);
11969 vallen = strlen(val);
11972 p = mempcpy(nameeq = ckmalloc(namelen + vallen + 2), name, namelen);
11976 p = mempcpy(p, val, vallen);
11979 setvareq(nameeq, flags | VNOSAVE);
11985 * Same as setvar except that the variable and value are passed in
11986 * the first argument as name=value. Since the first argument will
11987 * be actually stored in the table, it should not be a string that
11989 * Called with interrupts off.
11993 setvareq(char *s, int flags)
11995 struct var *vp, **vpp;
11998 flags |= (VEXPORT & (((unsigned) (1 - aflag)) - 1));
11999 vp = *findvar(vpp, s);
12001 if ((vp->flags & (VREADONLY|VDYNAMIC)) == VREADONLY) {
12004 if (flags & VNOSAVE)
12007 error("%.*s: is read only", strchrnul(n, '=') - n, n);
12010 if (flags & VNOSET)
12013 if (vp->func && (flags & VNOFUNC) == 0)
12014 (*vp->func)(strchrnul(s, '=') + 1);
12016 if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
12019 flags |= vp->flags & ~(VTEXTFIXED|VSTACK|VNOSAVE|VUNSET);
12021 if (flags & VNOSET)
12024 vp = ckmalloc(sizeof (*vp));
12029 if (!(flags & (VTEXTFIXED|VSTACK|VNOSAVE)))
12037 * Process a linked list of variable assignments.
12041 listsetvar(struct strlist *list_set_var, int flags)
12043 struct strlist *lp = list_set_var;
12049 setvareq(lp->text, flags);
12050 } while ((lp = lp->next));
12056 * Find the value of a variable. Returns NULL if not set.
12060 lookupvar(const char *name)
12064 if ((v = *findvar(hashvar(name), name))) {
12067 * Dynamic variables are implemented roughly the same way they are
12068 * in bash. Namely, they're "special" so long as they aren't unset.
12069 * As soon as they're unset, they're no longer dynamic, and dynamic
12070 * lookup will no longer happen at that point. -- PFM.
12072 if((v->flags & VDYNAMIC))
12075 if(!(v->flags & VUNSET))
12076 return strchrnul(v->text, '=') + 1;
12084 * Search the environment of a builtin command.
12088 bltinlookup(const char *name)
12090 struct strlist *sp;
12092 for (sp = cmdenviron ; sp ; sp = sp->next) {
12093 if (varequal(sp->text, name))
12094 return strchrnul(sp->text, '=') + 1;
12096 return lookupvar(name);
12101 * Generate a list of variables satisfying the given conditions.
12105 listvars(int on, int off, char ***end)
12116 for (vp = *vpp ; vp ; vp = vp->next)
12117 if ((vp->flags & mask) == on) {
12118 if (ep == stackstrend())
12119 ep = growstackstr();
12120 *ep++ = (char *) vp->text;
12122 } while (++vpp < vartab + VTABSIZE);
12123 if (ep == stackstrend())
12124 ep = growstackstr();
12128 return grabstackstr(ep);
12133 * POSIX requires that 'set' (but not export or readonly) output the
12134 * variables in lexicographic order - by the locale's collating order (sigh).
12135 * Maybe we could keep them in an ordered balanced binary tree
12136 * instead of hashed lists.
12137 * For now just roll 'em through qsort for printing...
12141 showvars(const char *sep_prefix, int on, int off)
12144 char **ep, **epend;
12146 ep = listvars(on, off, &epend);
12147 qsort(ep, epend - ep, sizeof(char *), vpcmp);
12149 sep = *sep_prefix ? spcstr : sep_prefix;
12151 for (; ep < epend; ep++) {
12155 p = strchrnul(*ep, '=');
12158 q = single_quote(++p);
12160 out1fmt("%s%s%.*s%s\n", sep_prefix, sep, (int)(p - *ep), *ep, q);
12169 * The export and readonly commands.
12173 exportcmd(int argc, char **argv)
12179 int flag = argv[0][0] == 'r'? VREADONLY : VEXPORT;
12182 notp = nextopt("p") - 'p';
12183 if (notp && ((name = *(aptr = argptr)))) {
12185 if ((p = strchr(name, '=')) != NULL) {
12188 if ((vp = *findvar(hashvar(name), name))) {
12193 setvar(name, p, flag);
12194 } while ((name = *++aptr) != NULL);
12196 showvars(argv[0], flag, 0);
12203 * Make a variable a local variable. When a variable is made local, it's
12204 * value and flags are saved in a localvar structure. The saved values
12205 * will be restored when the shell function returns. We handle the name
12206 * "-" as a special case.
12210 mklocal(char *name)
12212 struct localvar *lvp;
12217 lvp = ckmalloc(sizeof (struct localvar));
12218 if (name[0] == '-' && name[1] == '\0') {
12220 p = ckmalloc(sizeof(optlist));
12221 lvp->text = memcpy(p, optlist, sizeof(optlist));
12226 vpp = hashvar(name);
12227 vp = *findvar(vpp, name);
12228 eq = strchr(name, '=');
12231 setvareq(name, VSTRFIXED);
12233 setvar(name, NULL, VSTRFIXED);
12234 vp = *vpp; /* the new variable */
12235 lvp->flags = VUNSET;
12237 lvp->text = vp->text;
12238 lvp->flags = vp->flags;
12239 vp->flags |= VSTRFIXED|VTEXTFIXED;
12245 lvp->next = localvars;
12251 * The "local" command.
12255 localcmd(int argc, char **argv)
12260 while ((name = *argv++) != NULL) {
12268 * Called after a function returns.
12269 * Interrupts must be off.
12275 struct localvar *lvp;
12278 while ((lvp = localvars) != NULL) {
12279 localvars = lvp->next;
12281 TRACE(("poplocalvar %s", vp ? vp->text : "-"));
12282 if (vp == NULL) { /* $- saved */
12283 memcpy(optlist, lvp->text, sizeof(optlist));
12286 } else if ((lvp->flags & (VUNSET|VSTRFIXED)) == VUNSET) {
12287 unsetvar(vp->text);
12290 (*vp->func)(strchrnul(lvp->text, '=') + 1);
12291 if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
12293 vp->flags = lvp->flags;
12294 vp->text = lvp->text;
12302 * The unset builtin command. We unset the function before we unset the
12303 * variable to allow a function to be unset when there is a readonly variable
12304 * with the same name.
12308 unsetcmd(int argc, char **argv)
12315 while ((i = nextopt("vf")) != '\0') {
12319 for (ap = argptr; *ap ; ap++) {
12334 * Unset the specified variable.
12338 unsetvar(const char *s)
12344 vpp = findvar(hashvar(s), s);
12348 int flags = vp->flags;
12351 if (flags & VREADONLY)
12354 vp->flags &= ~VDYNAMIC;
12356 if (flags & VUNSET)
12358 if ((flags & VSTRFIXED) == 0) {
12360 if ((flags & (VTEXTFIXED|VSTACK)) == 0)
12367 vp->flags &= ~VEXPORT;
12380 * Find the appropriate entry in the hash table from the name.
12383 static struct var **
12384 hashvar(const char *p)
12386 unsigned int hashval;
12388 hashval = ((unsigned char) *p) << 4;
12389 while (*p && *p != '=')
12390 hashval += (unsigned char) *p++;
12391 return &vartab[hashval % VTABSIZE];
12397 * Compares two strings up to the first = or '\0'. The first
12398 * string must be terminated by '='; the second may be terminated by
12399 * either '=' or '\0'.
12403 varcmp(const char *p, const char *q)
12407 while ((c = *p) == (d = *q)) {
12408 if (!c || c == '=')
12422 vpcmp(const void *a, const void *b)
12424 return varcmp(*(const char **)a, *(const char **)b);
12427 static struct var **
12428 findvar(struct var **vpp, const char *name)
12430 for (; *vpp; vpp = &(*vpp)->next) {
12431 if (varequal((*vpp)->text, name)) {
12437 /* $NetBSD: setmode.c,v 1.29 2003/01/15 23:58:03 kleink Exp $ */
12439 #include <sys/times.h>
12441 static const unsigned char timescmd_str[] = {
12442 ' ', offsetof(struct tms, tms_utime),
12443 '\n', offsetof(struct tms, tms_stime),
12444 ' ', offsetof(struct tms, tms_cutime),
12445 '\n', offsetof(struct tms, tms_cstime),
12449 static int timescmd(int ac, char **av)
12451 long int clk_tck, s, t;
12452 const unsigned char *p;
12455 clk_tck = sysconf(_SC_CLK_TCK);
12460 t = *(clock_t *)(((char *) &buf) + p[1]);
12462 out1fmt("%ldm%ld.%.3lds%c",
12464 ((t - s * clk_tck) * 1000) / clk_tck,
12466 } while (*(p += 2));
12471 #ifdef CONFIG_ASH_MATH_SUPPORT
12473 dash_arith(const char *s)
12479 result = arith(s, &errcode);
12482 error("exponent less than 0");
12483 else if (errcode == -2)
12484 error("divide by zero");
12485 else if (errcode == -5)
12486 error("expression recursion loop detected");
12497 * The let builtin. partial stolen from GNU Bash, the Bourne Again SHell.
12498 * Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
12500 * Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
12504 letcmd(int argc, char **argv)
12511 error("expression expected");
12512 for (ap = argv + 1; *ap; ap++) {
12513 i = dash_arith(*ap);
12518 #endif /* CONFIG_ASH_MATH_SUPPORT */
12520 /* $NetBSD: miscbltin.c,v 1.31 2002/11/24 22:35:41 christos Exp $ */
12523 * Miscelaneous builtins.
12529 #if __GLIBC__ == 2 && __GLIBC_MINOR__ < 1
12530 typedef enum __rlimit_resource rlim_t;
12536 * The read builtin. The -e option causes backslashes to escape the
12537 * following character.
12539 * This uses unbuffered input, which may be avoidable in some cases.
12543 readcmd(int argc, char **argv)
12558 while ((i = nextopt("p:r")) != '\0') {
12560 prompt = optionarg;
12564 if (prompt && isatty(0)) {
12567 if (*(ap = argptr) == NULL)
12568 error("arg count");
12569 if ((ifs = bltinlookup("IFS")) == NULL)
12576 if (read(0, &c, 1) != 1) {
12588 if (!rflag && c == '\\') {
12594 if (startword && *ifs == ' ' && strchr(ifs, c)) {
12598 if (ap[1] != NULL && strchr(ifs, c) != NULL) {
12600 setvar(*ap, stackblock(), 0);
12610 /* Remove trailing blanks */
12611 while ((char *)stackblock() <= --p && strchr(ifs, *p) != NULL)
12613 setvar(*ap, stackblock(), 0);
12614 while (*++ap != NULL)
12615 setvar(*ap, nullstr, 0);
12620 static int umaskcmd(int argc, char **argv)
12622 static const char permuser[3] = "ugo";
12623 static const char permmode[3] = "rwx";
12624 static const short int permmask[] = {
12625 S_IRUSR, S_IWUSR, S_IXUSR,
12626 S_IRGRP, S_IWGRP, S_IXGRP,
12627 S_IROTH, S_IWOTH, S_IXOTH
12633 int symbolic_mode = 0;
12635 while (nextopt("S") != '\0') {
12644 if ((ap = *argptr) == NULL) {
12645 if (symbolic_mode) {
12649 for (i = 0; i < 3; i++) {
12652 *p++ = permuser[i];
12654 for (j = 0; j < 3; j++) {
12655 if ((mask & permmask[3 * i + j]) == 0) {
12656 *p++ = permmode[j];
12664 out1fmt("%.4o\n", mask);
12667 if (is_digit((unsigned char) *ap)) {
12670 if (*ap >= '8' || *ap < '0')
12671 error(illnum, argv[1]);
12672 mask = (mask << 3) + (*ap - '0');
12673 } while (*++ap != '\0');
12676 mask = ~mask & 0777;
12677 if (!bb_parse_mode(ap, &mask)) {
12678 error("Illegal mode: %s", ap);
12680 umask(~mask & 0777);
12689 * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
12690 * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
12691 * ash by J.T. Conklin.
12699 int factor; /* multiply by to get rlim_{cur,max} values */
12703 static const struct limits limits[] = {
12705 { "time(seconds)", RLIMIT_CPU, 1, 't' },
12707 #ifdef RLIMIT_FSIZE
12708 { "file(blocks)", RLIMIT_FSIZE, 512, 'f' },
12711 { "data(kbytes)", RLIMIT_DATA, 1024, 'd' },
12713 #ifdef RLIMIT_STACK
12714 { "stack(kbytes)", RLIMIT_STACK, 1024, 's' },
12717 { "coredump(blocks)", RLIMIT_CORE, 512, 'c' },
12720 { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' },
12722 #ifdef RLIMIT_MEMLOCK
12723 { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' },
12725 #ifdef RLIMIT_NPROC
12726 { "process", RLIMIT_NPROC, 1, 'p' },
12728 #ifdef RLIMIT_NOFILE
12729 { "nofiles", RLIMIT_NOFILE, 1, 'n' },
12732 { "vmemory(kbytes)", RLIMIT_AS, 1024, 'v' },
12734 #ifdef RLIMIT_LOCKS
12735 { "locks", RLIMIT_LOCKS, 1, 'w' },
12737 { (char *) 0, 0, 0, '\0' }
12740 enum limtype { SOFT = 0x1, HARD = 0x2 };
12742 static void printlim(enum limtype how, const struct rlimit *limit,
12743 const struct limits *l)
12747 val = limit->rlim_max;
12749 val = limit->rlim_cur;
12751 if (val == RLIM_INFINITY)
12752 out1fmt("unlimited\n");
12755 out1fmt("%lld\n", (long long) val);
12760 ulimitcmd(int argc, char **argv)
12764 enum limtype how = SOFT | HARD;
12765 const struct limits *l;
12768 struct rlimit limit;
12771 while ((optc = nextopt("HSa"
12775 #ifdef RLIMIT_FSIZE
12781 #ifdef RLIMIT_STACK
12790 #ifdef RLIMIT_MEMLOCK
12793 #ifdef RLIMIT_NPROC
12796 #ifdef RLIMIT_NOFILE
12802 #ifdef RLIMIT_LOCKS
12820 for (l = limits; l->option != what; l++)
12823 set = *argptr ? 1 : 0;
12827 if (all || argptr[1])
12828 error("too many arguments");
12829 if (strncmp(p, "unlimited\n", 9) == 0)
12830 val = RLIM_INFINITY;
12834 while ((c = *p++) >= '0' && c <= '9')
12836 val = (val * 10) + (long)(c - '0');
12837 if (val < (rlim_t) 0)
12841 error("bad number");
12846 for (l = limits; l->name; l++) {
12847 getrlimit(l->cmd, &limit);
12848 out1fmt("%-20s ", l->name);
12849 printlim(how, &limit, l);
12854 getrlimit(l->cmd, &limit);
12857 limit.rlim_max = val;
12859 limit.rlim_cur = val;
12860 if (setrlimit(l->cmd, &limit) < 0)
12861 error("error setting limit (%m)");
12863 printlim(how, &limit, l);
12869 #ifdef CONFIG_ASH_MATH_SUPPORT
12871 /* Copyright (c) 2001 Aaron Lehmann <aaronl@vitelus.com>
12873 Permission is hereby granted, free of charge, to any person obtaining
12874 a copy of this software and associated documentation files (the
12875 "Software"), to deal in the Software without restriction, including
12876 without limitation the rights to use, copy, modify, merge, publish,
12877 distribute, sublicense, and/or sell copies of the Software, and to
12878 permit persons to whom the Software is furnished to do so, subject to
12879 the following conditions:
12881 The above copyright notice and this permission notice shall be
12882 included in all copies or substantial portions of the Software.
12884 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
12885 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
12886 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
12887 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
12888 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
12889 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
12890 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
12893 /* This is my infix parser/evaluator. It is optimized for size, intended
12894 * as a replacement for yacc-based parsers. However, it may well be faster
12895 * than a comparable parser writen in yacc. The supported operators are
12896 * listed in #defines below. Parens, order of operations, and error handling
12897 * are supported. This code is threadsafe. The exact expression format should
12898 * be that which POSIX specifies for shells. */
12900 /* The code uses a simple two-stack algorithm. See
12901 * http://www.onthenet.com.au/~grahamis/int2008/week02/lect02.html
12902 * for a detailed explaination of the infix-to-postfix algorithm on which
12903 * this is based (this code differs in that it applies operators immediately
12904 * to the stack instead of adding them to a queue to end up with an
12907 /* To use the routine, call it with an expression string and error return
12911 * Aug 24, 2001 Manuel Novoa III
12913 * Reduced the generated code size by about 30% (i386) and fixed several bugs.
12915 * 1) In arith_apply():
12916 * a) Cached values of *numptr and &(numptr[-1]).
12917 * b) Removed redundant test for zero denominator.
12920 * a) Eliminated redundant code for processing operator tokens by moving
12921 * to a table-based implementation. Also folded handling of parens
12923 * b) Combined all 3 loops which called arith_apply to reduce generated
12924 * code size at the cost of speed.
12926 * 3) The following expressions were treated as valid by the original code:
12927 * 1() , 0! , 1 ( *3 ) .
12928 * These bugs have been fixed by internally enclosing the expression in
12929 * parens and then checking that all binary ops and right parens are
12930 * preceded by a valid expression (NUM_TOKEN).
12932 * Note: It may be desireable to replace Aaron's test for whitespace with
12933 * ctype's isspace() if it is used by another busybox applet or if additional
12934 * whitespace chars should be considered. Look below the "#include"s for a
12935 * precompiler test.
12939 * Aug 26, 2001 Manuel Novoa III
12941 * Return 0 for null expressions. Pointed out by Vladimir Oleynik.
12943 * Merge in Aaron's comments previously posted to the busybox list,
12944 * modified slightly to take account of my changes to the code.
12949 * (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
12951 * - allow access to variable,
12952 * used recursive find value indirection (c=2*2; a="c"; $((a+=2)) produce 6)
12953 * - realize assign syntax (VAR=expr, +=, *= etc)
12954 * - realize exponentiation (** operator)
12955 * - realize comma separated - expr, expr
12956 * - realise ++expr --expr expr++ expr--
12957 * - realise expr ? expr : expr (but, second expr calculate always)
12958 * - allow hexdecimal and octal numbers
12959 * - was restored loses XOR operator
12960 * - remove one goto label, added three ;-)
12961 * - protect $((num num)) as true zero expr (Manuel`s error)
12962 * - always use special isspace(), see comment from bash ;-)
12966 #define arith_isspace(arithval) \
12967 (arithval == ' ' || arithval == '\n' || arithval == '\t')
12970 typedef unsigned char operator;
12972 /* An operator's token id is a bit of a bitfield. The lower 5 bits are the
12973 * precedence, and 3 high bits are an ID unique accross operators of that
12974 * precedence. The ID portion is so that multiple operators can have the
12975 * same precedence, ensuring that the leftmost one is evaluated first.
12976 * Consider * and /. */
12978 #define tok_decl(prec,id) (((id)<<5)|(prec))
12979 #define PREC(op) ((op) & 0x1F)
12981 #define TOK_LPAREN tok_decl(0,0)
12983 #define TOK_COMMA tok_decl(1,0)
12985 #define TOK_ASSIGN tok_decl(2,0)
12986 #define TOK_AND_ASSIGN tok_decl(2,1)
12987 #define TOK_OR_ASSIGN tok_decl(2,2)
12988 #define TOK_XOR_ASSIGN tok_decl(2,3)
12989 #define TOK_PLUS_ASSIGN tok_decl(2,4)
12990 #define TOK_MINUS_ASSIGN tok_decl(2,5)
12991 #define TOK_LSHIFT_ASSIGN tok_decl(2,6)
12992 #define TOK_RSHIFT_ASSIGN tok_decl(2,7)
12994 #define TOK_MUL_ASSIGN tok_decl(3,0)
12995 #define TOK_DIV_ASSIGN tok_decl(3,1)
12996 #define TOK_REM_ASSIGN tok_decl(3,2)
12998 /* all assign is right associativity and precedence eq, but (7+3)<<5 > 256 */
12999 #define convert_prec_is_assing(prec) do { if(prec == 3) prec = 2; } while(0)
13001 /* conditional is right associativity too */
13002 #define TOK_CONDITIONAL tok_decl(4,0)
13003 #define TOK_CONDITIONAL_SEP tok_decl(4,1)
13005 #define TOK_OR tok_decl(5,0)
13007 #define TOK_AND tok_decl(6,0)
13009 #define TOK_BOR tok_decl(7,0)
13011 #define TOK_BXOR tok_decl(8,0)
13013 #define TOK_BAND tok_decl(9,0)
13015 #define TOK_EQ tok_decl(10,0)
13016 #define TOK_NE tok_decl(10,1)
13018 #define TOK_LT tok_decl(11,0)
13019 #define TOK_GT tok_decl(11,1)
13020 #define TOK_GE tok_decl(11,2)
13021 #define TOK_LE tok_decl(11,3)
13023 #define TOK_LSHIFT tok_decl(12,0)
13024 #define TOK_RSHIFT tok_decl(12,1)
13026 #define TOK_ADD tok_decl(13,0)
13027 #define TOK_SUB tok_decl(13,1)
13029 #define TOK_MUL tok_decl(14,0)
13030 #define TOK_DIV tok_decl(14,1)
13031 #define TOK_REM tok_decl(14,2)
13033 /* exponent is right associativity */
13034 #define TOK_EXPONENT tok_decl(15,1)
13036 /* For now unary operators. */
13037 #define UNARYPREC 16
13038 #define TOK_BNOT tok_decl(UNARYPREC,0)
13039 #define TOK_NOT tok_decl(UNARYPREC,1)
13041 #define TOK_UMINUS tok_decl(UNARYPREC+1,0)
13042 #define TOK_UPLUS tok_decl(UNARYPREC+1,1)
13044 #define PREC_PRE (UNARYPREC+2)
13046 #define TOK_PRE_INC tok_decl(PREC_PRE, 0)
13047 #define TOK_PRE_DEC tok_decl(PREC_PRE, 1)
13049 #define PREC_POST (UNARYPREC+3)
13051 #define TOK_POST_INC tok_decl(PREC_POST, 0)
13052 #define TOK_POST_DEC tok_decl(PREC_POST, 1)
13054 #define SPEC_PREC (UNARYPREC+4)
13056 #define TOK_NUM tok_decl(SPEC_PREC, 0)
13057 #define TOK_RPAREN tok_decl(SPEC_PREC, 1)
13059 #define NUMPTR (*numstackptr)
13061 static inline int tok_have_assign(operator op)
13063 operator prec = PREC(op);
13065 convert_prec_is_assing(prec);
13066 return (prec == PREC(TOK_ASSIGN) ||
13067 prec == PREC_PRE || prec == PREC_POST);
13070 static inline int is_right_associativity(operator prec)
13072 return (prec == PREC(TOK_ASSIGN) || prec == PREC(TOK_EXPONENT) ||
13073 prec == PREC(TOK_CONDITIONAL));
13077 typedef struct ARITCH_VAR_NUM {
13079 long contidional_second_val;
13080 char contidional_second_val_initialized;
13081 char *var; /* if NULL then is regular number,
13082 else is varable name */
13086 typedef struct CHK_VAR_RECURSIVE_LOOPED {
13088 struct CHK_VAR_RECURSIVE_LOOPED *next;
13089 } chk_var_recursive_looped_t;
13091 static chk_var_recursive_looped_t *prev_chk_var_recursive;
13094 static int arith_lookup_val(v_n_t *t)
13097 const char * p = lookupvar(t->var);
13102 /* recursive try as expression */
13103 chk_var_recursive_looped_t *cur;
13104 chk_var_recursive_looped_t cur_save;
13106 for(cur = prev_chk_var_recursive; cur; cur = cur->next) {
13107 if(strcmp(cur->var, t->var) == 0) {
13108 /* expression recursion loop detected */
13112 /* save current lookuped var name */
13113 cur = prev_chk_var_recursive;
13114 cur_save.var = t->var;
13115 cur_save.next = cur;
13116 prev_chk_var_recursive = &cur_save;
13118 t->val = arith (p, &errcode);
13119 /* restore previous ptr after recursiving */
13120 prev_chk_var_recursive = cur;
13123 /* allow undefined var as 0 */
13130 /* "applying" a token means performing it on the top elements on the integer
13131 * stack. For a unary operator it will only change the top element, but a
13132 * binary operator will pop two arguments and push a result */
13134 arith_apply(operator op, v_n_t *numstack, v_n_t **numstackptr)
13139 int ret_arith_lookup_val;
13141 if (NUMPTR == numstack) goto err; /* There is no operator that can work
13142 without arguments */
13143 numptr_m1 = NUMPTR - 1;
13145 /* check operand is var with noninteger value */
13146 ret_arith_lookup_val = arith_lookup_val(numptr_m1);
13147 if(ret_arith_lookup_val)
13148 return ret_arith_lookup_val;
13150 rez = numptr_m1->val;
13151 if (op == TOK_UMINUS)
13153 else if (op == TOK_NOT)
13155 else if (op == TOK_BNOT)
13157 else if (op == TOK_POST_INC || op == TOK_PRE_INC)
13159 else if (op == TOK_POST_DEC || op == TOK_PRE_DEC)
13161 else if (op != TOK_UPLUS) {
13162 /* Binary operators */
13164 /* check and binary operators need two arguments */
13165 if (numptr_m1 == numstack) goto err;
13167 /* ... and they pop one */
13170 if (op == TOK_CONDITIONAL) {
13171 if(! numptr_m1->contidional_second_val_initialized) {
13172 /* protect $((expr1 ? expr2)) without ": expr" */
13175 rez = numptr_m1->contidional_second_val;
13176 } else if(numptr_m1->contidional_second_val_initialized) {
13177 /* protect $((expr1 : expr2)) without "expr ? " */
13180 numptr_m1 = NUMPTR - 1;
13181 if(op != TOK_ASSIGN) {
13182 /* check operand is var with noninteger value for not '=' */
13183 ret_arith_lookup_val = arith_lookup_val(numptr_m1);
13184 if(ret_arith_lookup_val)
13185 return ret_arith_lookup_val;
13187 if (op == TOK_CONDITIONAL) {
13188 numptr_m1->contidional_second_val = rez;
13190 rez = numptr_m1->val;
13191 if (op == TOK_BOR || op == TOK_OR_ASSIGN)
13193 else if (op == TOK_OR)
13194 rez = numptr_val || rez;
13195 else if (op == TOK_BAND || op == TOK_AND_ASSIGN)
13197 else if (op == TOK_BXOR || op == TOK_XOR_ASSIGN)
13199 else if (op == TOK_AND)
13200 rez = rez && numptr_val;
13201 else if (op == TOK_EQ)
13202 rez = (rez == numptr_val);
13203 else if (op == TOK_NE)
13204 rez = (rez != numptr_val);
13205 else if (op == TOK_GE)
13206 rez = (rez >= numptr_val);
13207 else if (op == TOK_RSHIFT || op == TOK_RSHIFT_ASSIGN)
13208 rez >>= numptr_val;
13209 else if (op == TOK_LSHIFT || op == TOK_LSHIFT_ASSIGN)
13210 rez <<= numptr_val;
13211 else if (op == TOK_GT)
13212 rez = (rez > numptr_val);
13213 else if (op == TOK_LT)
13214 rez = (rez < numptr_val);
13215 else if (op == TOK_LE)
13216 rez = (rez <= numptr_val);
13217 else if (op == TOK_MUL || op == TOK_MUL_ASSIGN)
13219 else if (op == TOK_ADD || op == TOK_PLUS_ASSIGN)
13221 else if (op == TOK_SUB || op == TOK_MINUS_ASSIGN)
13223 else if (op == TOK_ASSIGN || op == TOK_COMMA)
13225 else if (op == TOK_CONDITIONAL_SEP) {
13226 if (numptr_m1 == numstack) {
13227 /* protect $((expr : expr)) without "expr ? " */
13230 numptr_m1->contidional_second_val_initialized = op;
13231 numptr_m1->contidional_second_val = numptr_val;
13233 else if (op == TOK_CONDITIONAL) {
13235 numptr_val : numptr_m1->contidional_second_val;
13237 else if(op == TOK_EXPONENT) {
13239 return -3; /* exponent less than 0 */
13244 while(numptr_val--)
13249 else if(numptr_val==0) /* zero divisor check */
13251 else if (op == TOK_DIV || op == TOK_DIV_ASSIGN)
13253 else if (op == TOK_REM || op == TOK_REM_ASSIGN)
13256 if(tok_have_assign(op)) {
13259 if(numptr_m1->var == NULL) {
13263 /* save to shell variable */
13264 sprintf(buf, "%ld", rez);
13265 setvar(numptr_m1->var, buf, 0);
13266 /* after saving, make previous value for v++ or v-- */
13267 if(op == TOK_POST_INC)
13269 else if(op == TOK_POST_DEC)
13272 numptr_m1->val = rez;
13273 /* protect geting var value, is number now */
13274 numptr_m1->var = NULL;
13279 /* longest must first */
13280 static const char op_tokens[] = {
13281 '<','<','=',0, TOK_LSHIFT_ASSIGN,
13282 '>','>','=',0, TOK_RSHIFT_ASSIGN,
13283 '<','<', 0, TOK_LSHIFT,
13284 '>','>', 0, TOK_RSHIFT,
13285 '|','|', 0, TOK_OR,
13286 '&','&', 0, TOK_AND,
13287 '!','=', 0, TOK_NE,
13288 '<','=', 0, TOK_LE,
13289 '>','=', 0, TOK_GE,
13290 '=','=', 0, TOK_EQ,
13291 '|','=', 0, TOK_OR_ASSIGN,
13292 '&','=', 0, TOK_AND_ASSIGN,
13293 '*','=', 0, TOK_MUL_ASSIGN,
13294 '/','=', 0, TOK_DIV_ASSIGN,
13295 '%','=', 0, TOK_REM_ASSIGN,
13296 '+','=', 0, TOK_PLUS_ASSIGN,
13297 '-','=', 0, TOK_MINUS_ASSIGN,
13298 '-','-', 0, TOK_POST_DEC,
13299 '^','=', 0, TOK_XOR_ASSIGN,
13300 '+','+', 0, TOK_POST_INC,
13301 '*','*', 0, TOK_EXPONENT,
13305 '=', 0, TOK_ASSIGN,
13317 '?', 0, TOK_CONDITIONAL,
13318 ':', 0, TOK_CONDITIONAL_SEP,
13319 ')', 0, TOK_RPAREN,
13320 '(', 0, TOK_LPAREN,
13324 #define endexpression &op_tokens[sizeof(op_tokens)-7]
13327 extern long arith (const char *expr, int *perrcode)
13329 register char arithval; /* Current character under analysis */
13330 operator lasttok, op;
13333 const char *p = endexpression;
13336 size_t datasizes = strlen(expr) + 2;
13338 /* Stack of integers */
13339 /* The proof that there can be no more than strlen(startbuf)/2+1 integers
13340 * in any given correct or incorrect expression is left as an excersize to
13342 v_n_t *numstack = alloca(((datasizes)/2)*sizeof(v_n_t)),
13343 *numstackptr = numstack;
13344 /* Stack of operator tokens */
13345 operator *stack = alloca((datasizes) * sizeof(operator)),
13348 *stackptr++ = lasttok = TOK_LPAREN; /* start off with a left paren */
13349 *perrcode = errcode = 0;
13352 if ((arithval = *expr) == 0) {
13353 if (p == endexpression) {
13354 /* Null expression. */
13358 /* This is only reached after all tokens have been extracted from the
13359 * input stream. If there are still tokens on the operator stack, they
13360 * are to be applied in order. At the end, there should be a final
13361 * result on the integer stack */
13363 if (expr != endexpression + 1) {
13364 /* If we haven't done so already, */
13365 /* append a closing right paren */
13366 expr = endexpression;
13367 /* and let the loop process it. */
13370 /* At this point, we're done with the expression. */
13371 if (numstackptr != numstack+1) {
13372 /* ... but if there isn't, it's bad */
13374 return (*perrcode = -1);
13376 if(numstack->var) {
13377 /* expression is $((var)) only, lookup now */
13378 errcode = arith_lookup_val(numstack);
13381 *perrcode = errcode;
13382 return numstack->val;
13384 /* Continue processing the expression. */
13385 if (arith_isspace(arithval)) {
13386 /* Skip whitespace */
13389 if((p = endofname(expr)) != expr) {
13390 int var_name_size = (p-expr) + 1; /* trailing zero */
13392 numstackptr->var = alloca(var_name_size);
13393 safe_strncpy(numstackptr->var, expr, var_name_size);
13396 numstackptr->contidional_second_val_initialized = 0;
13400 } else if (is_digit(arithval)) {
13401 numstackptr->var = NULL;
13402 numstackptr->val = strtol(expr, (char **) &expr, 0);
13405 for(p = op_tokens; ; p++) {
13409 /* strange operator not found */
13412 for(o = expr; *p && *o == *p; p++)
13419 /* skip tail uncompared token */
13422 /* skip zero delim */
13427 /* post grammar: a++ reduce to num */
13428 if(lasttok == TOK_POST_INC || lasttok == TOK_POST_DEC)
13431 /* Plus and minus are binary (not unary) _only_ if the last
13432 * token was as number, or a right paren (which pretends to be
13433 * a number, since it evaluates to one). Think about it.
13434 * It makes sense. */
13435 if (lasttok != TOK_NUM) {
13451 /* We don't want a unary operator to cause recursive descent on the
13452 * stack, because there can be many in a row and it could cause an
13453 * operator to be evaluated before its argument is pushed onto the
13454 * integer stack. */
13455 /* But for binary operators, "apply" everything on the operator
13456 * stack until we find an operator with a lesser priority than the
13457 * one we have just extracted. */
13458 /* Left paren is given the lowest priority so it will never be
13459 * "applied" in this way.
13460 * if associativity is right and priority eq, applied also skip
13463 if ((prec > 0 && prec < UNARYPREC) || prec == SPEC_PREC) {
13464 /* not left paren or unary */
13465 if (lasttok != TOK_NUM) {
13466 /* binary op must be preceded by a num */
13469 while (stackptr != stack) {
13470 if (op == TOK_RPAREN) {
13471 /* The algorithm employed here is simple: while we don't
13472 * hit an open paren nor the bottom of the stack, pop
13473 * tokens and apply them */
13474 if (stackptr[-1] == TOK_LPAREN) {
13476 /* Any operator directly after a */
13478 /* close paren should consider itself binary */
13482 operator prev_prec = PREC(stackptr[-1]);
13484 convert_prec_is_assing(prec);
13485 convert_prec_is_assing(prev_prec);
13486 if (prev_prec < prec)
13488 /* check right assoc */
13489 if(prev_prec == prec && is_right_associativity(prec))
13492 errcode = arith_apply(*--stackptr, numstack, &numstackptr);
13493 if(errcode) goto ret;
13495 if (op == TOK_RPAREN) {
13500 /* Push this operator to the stack and remember it. */
13501 *stackptr++ = lasttok = op;
13508 #endif /* CONFIG_ASH_MATH_SUPPORT */
13512 const char *bb_applet_name = "debug stuff usage";
13513 int main(int argc, char **argv)
13515 return ash_main(argc, argv);
13520 * Copyright (c) 1989, 1991, 1993, 1994
13521 * The Regents of the University of California. All rights reserved.
13523 * This code is derived from software contributed to Berkeley by
13524 * Kenneth Almquist.
13526 * Redistribution and use in source and binary forms, with or without
13527 * modification, are permitted provided that the following conditions
13529 * 1. Redistributions of source code must retain the above copyright
13530 * notice, this list of conditions and the following disclaimer.
13531 * 2. Redistributions in binary form must reproduce the above copyright
13532 * notice, this list of conditions and the following disclaimer in the
13533 * documentation and/or other materials provided with the distribution.
13535 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
13536 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
13538 * 4. Neither the name of the University nor the names of its contributors
13539 * may be used to endorse or promote products derived from this software
13540 * without specific prior written permission.
13542 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
13543 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
13544 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
13545 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
13546 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
13547 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
13548 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
13549 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
13550 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
13551 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF