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 Vladimir Oleynik <dzo@simtreas.ru> (c) 2001-2003 to be
37 * used in busybox and size optimizations,
38 * support locale, rewrited arith (see notes to this)
44 * The follow should be set to reflect the type of system you have:
45 * JOBS -> 1 if you have Berkeley job control, 0 otherwise.
46 * define SYSV if you are running under System V.
47 * define DEBUG=1 to compile in debugging ('set -o debug' to turn on)
48 * define DEBUG=2 to compile in and turn on debugging.
50 * When debugging is on, debugging info will be written to ./trace and
51 * a quit signal will generate a core dump.
64 #include <sys/types.h>
65 #include <sys/cdefs.h>
66 #include <sys/ioctl.h>
67 #include <sys/param.h>
68 #include <sys/resource.h>
98 #ifdef CONFIG_ASH_JOB_CONTROL
112 static int *dash_errno;
114 #define errno (*dash_errno)
117 #if defined(__uClinux__)
118 #error "Do not even bother, ash will not run on uClinux"
122 #define _DIAGASSERT(assert_expr) assert(assert_expr)
124 #define _DIAGASSERT(assert_expr)
128 #ifdef CONFIG_ASH_ALIAS
129 /* $NetBSD: alias.h,v 1.5 2002/11/24 22:35:38 christos Exp $ */
141 static struct alias *lookupalias(const char *, int);
142 static int aliascmd(int, char **);
143 static int unaliascmd(int, char **);
144 static void rmaliases(void);
145 static int unalias(const char *);
146 static void printalias(const struct alias *);
149 /* $NetBSD: cd.h,v 1.3 2002/11/24 22:35:39 christos Exp $ */
152 static void setpwd(const char *, int);
154 /* $NetBSD: error.h,v 1.15 2002/11/24 22:35:39 christos Exp $ */
158 * Types of operations (passed to the errmsg routine).
162 static const char not_found_msg[] = "%s: not found";
165 #define E_OPEN "No such file" /* opening a file */
166 #define E_CREAT "Directory nonexistent" /* creating a file */
167 #define E_EXEC not_found_msg+4 /* executing a program */
170 * We enclose jmp_buf in a structure so that we can declare pointers to
171 * jump locations. The global variable handler contains the location to
172 * jump to when an exception occurs, and the global variable exception
173 * contains a code identifying the exeception. To implement nested
174 * exception handlers, the user should save the value of handler on entry
175 * to an inner scope, set handler to point to a jmploc structure for the
176 * inner scope, and restore handler on exit from the scope.
183 static struct jmploc *handler;
184 static int exception;
185 static volatile int suppressint;
186 static volatile sig_atomic_t intpending;
188 static int exerrno; /* Last exec error, error for EXEXEC */
191 #define EXINT 0 /* SIGINT received */
192 #define EXERROR 1 /* a generic error */
193 #define EXSHELLPROC 2 /* execute a shell procedure */
194 #define EXEXEC 3 /* command execution failed */
195 #define EXEXIT 4 /* exit the shell */
196 #define EXSIG 5 /* trapped signal in wait(1) */
199 /* do we generate EXSIG events */
201 /* last pending signal */
202 static volatile sig_atomic_t pendingsigs;
205 * These macros allow the user to suspend the handling of interrupt signals
206 * over a period of time. This is similar to SIGHOLD to or sigblock, but
207 * much more efficient and portable. (But hacking the kernel is so much
208 * more fun than worrying about efficiency and portability. :-))
211 #define barrier() ({ __asm__ __volatile__ ("": : :"memory"); })
218 #define SAVEINT(v) ((v) = suppressint)
219 #define RESTOREINT(v) \
222 if ((suppressint = (v)) == 0 && intpending) onint(); \
233 /* EXSIG is turned off by evalbltin(). */
236 static void exraise(int) __attribute__((__noreturn__));
237 static void onint(void) __attribute__((__noreturn__));
239 static void error(const char *, ...) __attribute__((__noreturn__));
240 static void exerror(int, const char *, ...) __attribute__((__noreturn__));
242 static void sh_warnx(const char *, ...);
244 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
247 if (--suppressint == 0 && intpending) {
251 #define INTON inton()
252 static void forceinton(void)
258 #define FORCEINTON forceinton()
263 if (--suppressint == 0 && intpending) onint(); \
270 if (intpending) onint(); \
273 #endif /* CONFIG_ASH_OPTIMIZE_FOR_SIZE */
276 * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
277 * so we use _setjmp instead.
280 #if defined(BSD) && !defined(__SVR4) && !defined(__GLIBC__)
281 #define setjmp(jmploc) _setjmp(jmploc)
282 #define longjmp(jmploc, val) _longjmp(jmploc, val)
285 /* $NetBSD: expand.h,v 1.13 2002/11/24 22:35:40 christos Exp $ */
288 struct strlist *next;
294 struct strlist *list;
295 struct strlist **lastp;
301 #define EXP_FULL 0x1 /* perform word splitting & file globbing */
302 #define EXP_TILDE 0x2 /* do normal tilde expansion */
303 #define EXP_VARTILDE 0x4 /* expand tildes in an assignment */
304 #define EXP_REDIR 0x8 /* file glob for a redirection (1 match only) */
305 #define EXP_CASE 0x10 /* keeps quotes around for CASE pattern */
306 #define EXP_RECORD 0x20 /* need to record arguments for ifs breakup */
307 #define EXP_VARTILDE2 0x40 /* expand tildes after colons only */
308 #define EXP_WORD 0x80 /* expand word in parameter expansion */
309 #define EXP_QWORD 0x100 /* expand word in quoted parameter expansion */
313 static void expandarg(union node *, struct arglist *, int);
314 #define rmescapes(p) _rmescapes((p), 0)
315 static char *_rmescapes(char *, int);
316 static int casematch(union node *, char *);
318 #ifdef CONFIG_ASH_MATH_SUPPORT
319 static void expari(int);
322 /* $NetBSD: eval.h,v 1.13 2002/11/24 22:35:39 christos Exp $ */
324 static char *commandname; /* currently executing command */
325 static struct strlist *cmdenviron; /* environment for builtin command */
326 static int exitstatus; /* exit status of last command */
327 static int back_exitstatus; /* exit status of backquoted command */
330 struct backcmd { /* result of evalbackcmd */
331 int fd; /* file descriptor to read from */
332 char *buf; /* buffer */
333 int nleft; /* number of chars in buffer */
334 struct job *jp; /* job structure for command */
338 * This file was generated by the mknodes program.
374 union node *redirect;
381 struct nodelist *cmdlist;
388 union node *redirect;
403 union node *elsepart;
434 struct nodelist *backquote;
474 struct nredir nredir;
475 struct nbinary nbinary;
479 struct nclist nclist;
489 struct nodelist *next;
500 static void freefunc(struct funcnode *);
501 /* $NetBSD: parser.h,v 1.15 2002/11/24 22:35:42 christos Exp $ */
503 /* control characters in argument strings */
504 #define CTL_FIRST '\201' /* first 'special' character */
505 #define CTLESC '\201' /* escape next character */
506 #define CTLVAR '\202' /* variable defn */
507 #define CTLENDVAR '\203'
508 #define CTLBACKQ '\204'
509 #define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */
510 /* CTLBACKQ | CTLQUOTE == '\205' */
511 #define CTLARI '\206' /* arithmetic expression */
512 #define CTLENDARI '\207'
513 #define CTLQUOTEMARK '\210'
514 #define CTL_LAST '\210' /* last 'special' character */
516 /* variable substitution byte (follows CTLVAR) */
517 #define VSTYPE 0x0f /* type of variable substitution */
518 #define VSNUL 0x10 /* colon--treat the empty string as unset */
519 #define VSQUOTE 0x80 /* inside double quotes--suppress splitting */
521 /* values of VSTYPE field */
522 #define VSNORMAL 0x1 /* normal variable: $var or ${var} */
523 #define VSMINUS 0x2 /* ${var-text} */
524 #define VSPLUS 0x3 /* ${var+text} */
525 #define VSQUESTION 0x4 /* ${var?message} */
526 #define VSASSIGN 0x5 /* ${var=text} */
527 #define VSTRIMRIGHT 0x6 /* ${var%pattern} */
528 #define VSTRIMRIGHTMAX 0x7 /* ${var%%pattern} */
529 #define VSTRIMLEFT 0x8 /* ${var#pattern} */
530 #define VSTRIMLEFTMAX 0x9 /* ${var##pattern} */
531 #define VSLENGTH 0xa /* ${#var} */
533 /* values of checkkwd variable */
538 #define IBUFSIZ (BUFSIZ + 1)
541 * NEOF is returned by parsecmd when it encounters an end of file. It
542 * must be distinct from NULL, so we use the address of a variable that
543 * happens to be handy.
545 static int plinno = 1; /* input line number */
547 /* number of characters left in input buffer */
548 static int parsenleft; /* copy of parsefile->nleft */
549 static int parselleft; /* copy of parsefile->lleft */
551 /* next character in input buffer */
552 static char *parsenextc; /* copy of parsefile->nextc */
555 struct strpush *prev; /* preceding string on stack */
558 #ifdef CONFIG_ASH_ALIAS
559 struct alias *ap; /* if push was associated with an alias */
561 char *string; /* remember the string since it may change */
565 struct parsefile *prev; /* preceding file on stack */
566 int linno; /* current line */
567 int fd; /* file descriptor (or -1 if string) */
568 int nleft; /* number of chars left in this line */
569 int lleft; /* number of chars left in this buffer */
570 char *nextc; /* next char in buffer */
571 char *buf; /* input buffer */
572 struct strpush *strpush; /* for pushing strings at this level */
573 struct strpush basestrpush; /* so pushing one is fast */
576 static struct parsefile basepf; /* top level input file */
577 static char basebuf[IBUFSIZ]; /* buffer for top level input file */
578 static struct parsefile *parsefile = &basepf; /* current input file */
581 static int tokpushback; /* last token pushed back */
582 #define NEOF ((union node *)&tokpushback)
583 static int parsebackquote; /* nonzero if we are inside backquotes */
584 static int doprompt; /* if set, prompt the user */
585 static int needprompt; /* true if interactive and at start of line */
586 static int lasttoken; /* last token read */
587 static char *wordtext; /* text of last word returned by readtoken */
589 static struct nodelist *backquotelist;
590 static union node *redirnode;
591 static struct heredoc *heredoc;
592 static int quoteflag; /* set if (part of) last token was quoted */
593 static int startlinno; /* line # where last token started */
595 static union node *parsecmd(int);
596 static void fixredir(union node *, const char *, int);
597 static const char *const *findkwd(const char *);
598 static char *endofname(const char *);
600 /* $NetBSD: shell.h,v 1.16 2003/01/22 20:36:04 dsl Exp $ */
602 typedef void *pointer;
604 static char nullstr[1]; /* zero length string */
605 static const char spcstr[] = " ";
606 static const char snlfmt[] = "%s\n";
607 static const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
608 static const char illnum[] = "Illegal number: %s";
609 static const char homestr[] = "HOME";
612 #define TRACE(param) trace param
613 #define TRACEV(param) tracev param
616 #define TRACEV(param)
619 #if !defined(__GNUC__) || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
620 #define __builtin_expect(x, expected_value) (x)
623 #define likely(x) __builtin_expect((x),1)
638 #define TENDBQUOTE 12
656 /* first char is indicating which tokens mark the end of a list */
657 static const char *const tokname_array[] = {
672 /* the following are keywords */
691 static const char *tokname(int tok)
697 sprintf(buf + (tok >= TSEMI), "%s%c",
698 tokname_array[tok] + 1, (tok >= TSEMI ? '"' : 0));
702 /* $NetBSD: machdep.h,v 1.10 2002/10/07 14:26:08 christos Exp $ */
705 * Most machines require the value returned from malloc to be aligned
706 * in some way. The following macro will get this right on many machines.
709 #define SHELL_SIZE (sizeof(union {int i; char *cp; double d; }) - 1)
711 * It appears that grabstackstr() will barf with such alignments
712 * because stalloc() will return a string allocated in a new stackblock.
714 #define SHELL_ALIGN(nbytes) (((nbytes) + SHELL_SIZE) & ~SHELL_SIZE)
717 * This file was generated by the mksyntax program.
722 #define CWORD 0 /* character is nothing special */
723 #define CNL 1 /* newline character */
724 #define CBACK 2 /* a backslash character */
725 #define CSQUOTE 3 /* single quote */
726 #define CDQUOTE 4 /* double quote */
727 #define CENDQUOTE 5 /* a terminating quote */
728 #define CBQUOTE 6 /* backwards single quote */
729 #define CVAR 7 /* a dollar sign */
730 #define CENDVAR 8 /* a '}' character */
731 #define CLP 9 /* a left paren in arithmetic */
732 #define CRP 10 /* a right paren in arithmetic */
733 #define CENDFILE 11 /* end of file */
734 #define CCTL 12 /* like CWORD, except it must be escaped */
735 #define CSPCL 13 /* these terminate a word */
736 #define CIGN 14 /* character should be ignored */
738 #ifdef CONFIG_ASH_ALIAS
742 #define PEOA_OR_PEOF PEOA
746 #define PEOA_OR_PEOF PEOF
749 #define is_digit(c) ((unsigned)((c) - '0') <= 9)
750 #define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
751 #define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
754 * is_special(c) evaluates to 1 for c in "!#$*-0123456789?@"; 0 otherwise
755 * (assuming ascii char codes, as the original implementation did)
757 #define is_special(c) \
758 ( (((unsigned int)c) - 33 < 32) \
759 && ((0xc1ff920dUL >> (((unsigned int)c) - 33)) & 1))
761 #define digit_val(c) ((c) - '0')
764 * This file was generated by the mksyntax program.
767 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
768 #define USE_SIT_FUNCTION
771 /* number syntax index */
772 #define BASESYNTAX 0 /* not in quotes */
773 #define DQSYNTAX 1 /* in double quotes */
774 #define SQSYNTAX 2 /* in single quotes */
775 #define ARISYNTAX 3 /* in arithmetic */
777 #ifdef CONFIG_ASH_MATH_SUPPORT
778 static const char S_I_T[][4] = {
779 #ifdef CONFIG_ASH_ALIAS
780 {CSPCL, CIGN, CIGN, CIGN}, /* 0, PEOA */
782 {CSPCL, CWORD, CWORD, CWORD}, /* 1, ' ' */
783 {CNL, CNL, CNL, CNL}, /* 2, \n */
784 {CWORD, CCTL, CCTL, CWORD}, /* 3, !*-/:=?[]~ */
785 {CDQUOTE, CENDQUOTE, CWORD, CWORD}, /* 4, '"' */
786 {CVAR, CVAR, CWORD, CVAR}, /* 5, $ */
787 {CSQUOTE, CWORD, CENDQUOTE, CWORD}, /* 6, "'" */
788 {CSPCL, CWORD, CWORD, CLP}, /* 7, ( */
789 {CSPCL, CWORD, CWORD, CRP}, /* 8, ) */
790 {CBACK, CBACK, CCTL, CBACK}, /* 9, \ */
791 {CBQUOTE, CBQUOTE, CWORD, CBQUOTE}, /* 10, ` */
792 {CENDVAR, CENDVAR, CWORD, CENDVAR}, /* 11, } */
793 #ifndef USE_SIT_FUNCTION
794 {CENDFILE, CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
795 {CWORD, CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
796 {CCTL, CCTL, CCTL, CCTL} /* 14, CTLESC ... */
800 static const char S_I_T[][3] = {
801 #ifdef CONFIG_ASH_ALIAS
802 {CSPCL, CIGN, CIGN}, /* 0, PEOA */
804 {CSPCL, CWORD, CWORD}, /* 1, ' ' */
805 {CNL, CNL, CNL}, /* 2, \n */
806 {CWORD, CCTL, CCTL}, /* 3, !*-/:=?[]~ */
807 {CDQUOTE, CENDQUOTE, CWORD}, /* 4, '"' */
808 {CVAR, CVAR, CWORD}, /* 5, $ */
809 {CSQUOTE, CWORD, CENDQUOTE}, /* 6, "'" */
810 {CSPCL, CWORD, CWORD}, /* 7, ( */
811 {CSPCL, CWORD, CWORD}, /* 8, ) */
812 {CBACK, CBACK, CCTL}, /* 9, \ */
813 {CBQUOTE, CBQUOTE, CWORD}, /* 10, ` */
814 {CENDVAR, CENDVAR, CWORD}, /* 11, } */
815 #ifndef USE_SIT_FUNCTION
816 {CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
817 {CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
818 {CCTL, CCTL, CCTL} /* 14, CTLESC ... */
821 #endif /* CONFIG_ASH_MATH_SUPPORT */
823 #ifdef USE_SIT_FUNCTION
825 #define U_C(c) ((unsigned char)(c))
827 static int SIT(int c, int syntax)
829 static const char spec_symbls[] = "\t\n !\"$&'()*-/:;<=>?[\\]`|}~";
830 #ifdef CONFIG_ASH_ALIAS
831 static const char syntax_index_table[] = {
832 1, 2, 1, 3, 4, 5, 1, 6, /* "\t\n !\"$&'" */
833 7, 8, 3, 3, 3, 3, 1, 1, /* "()*-/:;<" */
834 3, 1, 3, 3, 9, 3, 10, 1, /* "=>?[\\]`|" */
838 static const char syntax_index_table[] = {
839 0, 1, 0, 2, 3, 4, 0, 5, /* "\t\n !\"$&'" */
840 6, 7, 2, 2, 2, 2, 0, 0, /* "()*-/:;<" */
841 2, 0, 2, 2, 8, 2, 9, 0, /* "=>?[\\]`|" */
848 if (c == PEOF) /* 2^8+2 */
850 #ifdef CONFIG_ASH_ALIAS
851 if (c == PEOA) /* 2^8+1 */
855 if (U_C(c) >= U_C(CTLESC) && U_C(c) <= U_C(CTLQUOTEMARK))
858 s = strchr(spec_symbls, c);
859 if (s == 0 || *s == 0)
861 indx = syntax_index_table[(s - spec_symbls)];
863 return S_I_T[indx][syntax];
866 #else /* USE_SIT_FUNCTION */
868 #define SIT(c, syntax) S_I_T[(int)syntax_index_table[((int)c)+SYNBASE]][syntax]
870 #ifdef CONFIG_ASH_ALIAS
871 #define CSPCL_CIGN_CIGN_CIGN 0
872 #define CSPCL_CWORD_CWORD_CWORD 1
873 #define CNL_CNL_CNL_CNL 2
874 #define CWORD_CCTL_CCTL_CWORD 3
875 #define CDQUOTE_CENDQUOTE_CWORD_CWORD 4
876 #define CVAR_CVAR_CWORD_CVAR 5
877 #define CSQUOTE_CWORD_CENDQUOTE_CWORD 6
878 #define CSPCL_CWORD_CWORD_CLP 7
879 #define CSPCL_CWORD_CWORD_CRP 8
880 #define CBACK_CBACK_CCTL_CBACK 9
881 #define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 10
882 #define CENDVAR_CENDVAR_CWORD_CENDVAR 11
883 #define CENDFILE_CENDFILE_CENDFILE_CENDFILE 12
884 #define CWORD_CWORD_CWORD_CWORD 13
885 #define CCTL_CCTL_CCTL_CCTL 14
887 #define CSPCL_CWORD_CWORD_CWORD 0
888 #define CNL_CNL_CNL_CNL 1
889 #define CWORD_CCTL_CCTL_CWORD 2
890 #define CDQUOTE_CENDQUOTE_CWORD_CWORD 3
891 #define CVAR_CVAR_CWORD_CVAR 4
892 #define CSQUOTE_CWORD_CENDQUOTE_CWORD 5
893 #define CSPCL_CWORD_CWORD_CLP 6
894 #define CSPCL_CWORD_CWORD_CRP 7
895 #define CBACK_CBACK_CCTL_CBACK 8
896 #define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 9
897 #define CENDVAR_CENDVAR_CWORD_CENDVAR 10
898 #define CENDFILE_CENDFILE_CENDFILE_CENDFILE 11
899 #define CWORD_CWORD_CWORD_CWORD 12
900 #define CCTL_CCTL_CCTL_CCTL 13
903 static const char syntax_index_table[258] = {
904 /* BASESYNTAX_DQSYNTAX_SQSYNTAX_ARISYNTAX */
905 /* 0 PEOF */ CENDFILE_CENDFILE_CENDFILE_CENDFILE,
906 #ifdef CONFIG_ASH_ALIAS
907 /* 1 PEOA */ CSPCL_CIGN_CIGN_CIGN,
909 /* 2 -128 0x80 */ CWORD_CWORD_CWORD_CWORD,
910 /* 3 -127 CTLESC */ CCTL_CCTL_CCTL_CCTL,
911 /* 4 -126 CTLVAR */ CCTL_CCTL_CCTL_CCTL,
912 /* 5 -125 CTLENDVAR */ CCTL_CCTL_CCTL_CCTL,
913 /* 6 -124 CTLBACKQ */ CCTL_CCTL_CCTL_CCTL,
914 /* 7 -123 CTLQUOTE */ CCTL_CCTL_CCTL_CCTL,
915 /* 8 -122 CTLARI */ CCTL_CCTL_CCTL_CCTL,
916 /* 9 -121 CTLENDARI */ CCTL_CCTL_CCTL_CCTL,
917 /* 10 -120 CTLQUOTEMARK */ CCTL_CCTL_CCTL_CCTL,
918 /* 11 -119 */ CWORD_CWORD_CWORD_CWORD,
919 /* 12 -118 */ CWORD_CWORD_CWORD_CWORD,
920 /* 13 -117 */ CWORD_CWORD_CWORD_CWORD,
921 /* 14 -116 */ CWORD_CWORD_CWORD_CWORD,
922 /* 15 -115 */ CWORD_CWORD_CWORD_CWORD,
923 /* 16 -114 */ CWORD_CWORD_CWORD_CWORD,
924 /* 17 -113 */ CWORD_CWORD_CWORD_CWORD,
925 /* 18 -112 */ CWORD_CWORD_CWORD_CWORD,
926 /* 19 -111 */ CWORD_CWORD_CWORD_CWORD,
927 /* 20 -110 */ CWORD_CWORD_CWORD_CWORD,
928 /* 21 -109 */ CWORD_CWORD_CWORD_CWORD,
929 /* 22 -108 */ CWORD_CWORD_CWORD_CWORD,
930 /* 23 -107 */ CWORD_CWORD_CWORD_CWORD,
931 /* 24 -106 */ CWORD_CWORD_CWORD_CWORD,
932 /* 25 -105 */ CWORD_CWORD_CWORD_CWORD,
933 /* 26 -104 */ CWORD_CWORD_CWORD_CWORD,
934 /* 27 -103 */ CWORD_CWORD_CWORD_CWORD,
935 /* 28 -102 */ CWORD_CWORD_CWORD_CWORD,
936 /* 29 -101 */ CWORD_CWORD_CWORD_CWORD,
937 /* 30 -100 */ CWORD_CWORD_CWORD_CWORD,
938 /* 31 -99 */ CWORD_CWORD_CWORD_CWORD,
939 /* 32 -98 */ CWORD_CWORD_CWORD_CWORD,
940 /* 33 -97 */ CWORD_CWORD_CWORD_CWORD,
941 /* 34 -96 */ CWORD_CWORD_CWORD_CWORD,
942 /* 35 -95 */ CWORD_CWORD_CWORD_CWORD,
943 /* 36 -94 */ CWORD_CWORD_CWORD_CWORD,
944 /* 37 -93 */ CWORD_CWORD_CWORD_CWORD,
945 /* 38 -92 */ CWORD_CWORD_CWORD_CWORD,
946 /* 39 -91 */ CWORD_CWORD_CWORD_CWORD,
947 /* 40 -90 */ CWORD_CWORD_CWORD_CWORD,
948 /* 41 -89 */ CWORD_CWORD_CWORD_CWORD,
949 /* 42 -88 */ CWORD_CWORD_CWORD_CWORD,
950 /* 43 -87 */ CWORD_CWORD_CWORD_CWORD,
951 /* 44 -86 */ CWORD_CWORD_CWORD_CWORD,
952 /* 45 -85 */ CWORD_CWORD_CWORD_CWORD,
953 /* 46 -84 */ CWORD_CWORD_CWORD_CWORD,
954 /* 47 -83 */ CWORD_CWORD_CWORD_CWORD,
955 /* 48 -82 */ CWORD_CWORD_CWORD_CWORD,
956 /* 49 -81 */ CWORD_CWORD_CWORD_CWORD,
957 /* 50 -80 */ CWORD_CWORD_CWORD_CWORD,
958 /* 51 -79 */ CWORD_CWORD_CWORD_CWORD,
959 /* 52 -78 */ CWORD_CWORD_CWORD_CWORD,
960 /* 53 -77 */ CWORD_CWORD_CWORD_CWORD,
961 /* 54 -76 */ CWORD_CWORD_CWORD_CWORD,
962 /* 55 -75 */ CWORD_CWORD_CWORD_CWORD,
963 /* 56 -74 */ CWORD_CWORD_CWORD_CWORD,
964 /* 57 -73 */ CWORD_CWORD_CWORD_CWORD,
965 /* 58 -72 */ CWORD_CWORD_CWORD_CWORD,
966 /* 59 -71 */ CWORD_CWORD_CWORD_CWORD,
967 /* 60 -70 */ CWORD_CWORD_CWORD_CWORD,
968 /* 61 -69 */ CWORD_CWORD_CWORD_CWORD,
969 /* 62 -68 */ CWORD_CWORD_CWORD_CWORD,
970 /* 63 -67 */ CWORD_CWORD_CWORD_CWORD,
971 /* 64 -66 */ CWORD_CWORD_CWORD_CWORD,
972 /* 65 -65 */ CWORD_CWORD_CWORD_CWORD,
973 /* 66 -64 */ CWORD_CWORD_CWORD_CWORD,
974 /* 67 -63 */ CWORD_CWORD_CWORD_CWORD,
975 /* 68 -62 */ CWORD_CWORD_CWORD_CWORD,
976 /* 69 -61 */ CWORD_CWORD_CWORD_CWORD,
977 /* 70 -60 */ CWORD_CWORD_CWORD_CWORD,
978 /* 71 -59 */ CWORD_CWORD_CWORD_CWORD,
979 /* 72 -58 */ CWORD_CWORD_CWORD_CWORD,
980 /* 73 -57 */ CWORD_CWORD_CWORD_CWORD,
981 /* 74 -56 */ CWORD_CWORD_CWORD_CWORD,
982 /* 75 -55 */ CWORD_CWORD_CWORD_CWORD,
983 /* 76 -54 */ CWORD_CWORD_CWORD_CWORD,
984 /* 77 -53 */ CWORD_CWORD_CWORD_CWORD,
985 /* 78 -52 */ CWORD_CWORD_CWORD_CWORD,
986 /* 79 -51 */ CWORD_CWORD_CWORD_CWORD,
987 /* 80 -50 */ CWORD_CWORD_CWORD_CWORD,
988 /* 81 -49 */ CWORD_CWORD_CWORD_CWORD,
989 /* 82 -48 */ CWORD_CWORD_CWORD_CWORD,
990 /* 83 -47 */ CWORD_CWORD_CWORD_CWORD,
991 /* 84 -46 */ CWORD_CWORD_CWORD_CWORD,
992 /* 85 -45 */ CWORD_CWORD_CWORD_CWORD,
993 /* 86 -44 */ CWORD_CWORD_CWORD_CWORD,
994 /* 87 -43 */ CWORD_CWORD_CWORD_CWORD,
995 /* 88 -42 */ CWORD_CWORD_CWORD_CWORD,
996 /* 89 -41 */ CWORD_CWORD_CWORD_CWORD,
997 /* 90 -40 */ CWORD_CWORD_CWORD_CWORD,
998 /* 91 -39 */ CWORD_CWORD_CWORD_CWORD,
999 /* 92 -38 */ CWORD_CWORD_CWORD_CWORD,
1000 /* 93 -37 */ CWORD_CWORD_CWORD_CWORD,
1001 /* 94 -36 */ CWORD_CWORD_CWORD_CWORD,
1002 /* 95 -35 */ CWORD_CWORD_CWORD_CWORD,
1003 /* 96 -34 */ CWORD_CWORD_CWORD_CWORD,
1004 /* 97 -33 */ CWORD_CWORD_CWORD_CWORD,
1005 /* 98 -32 */ CWORD_CWORD_CWORD_CWORD,
1006 /* 99 -31 */ CWORD_CWORD_CWORD_CWORD,
1007 /* 100 -30 */ CWORD_CWORD_CWORD_CWORD,
1008 /* 101 -29 */ CWORD_CWORD_CWORD_CWORD,
1009 /* 102 -28 */ CWORD_CWORD_CWORD_CWORD,
1010 /* 103 -27 */ CWORD_CWORD_CWORD_CWORD,
1011 /* 104 -26 */ CWORD_CWORD_CWORD_CWORD,
1012 /* 105 -25 */ CWORD_CWORD_CWORD_CWORD,
1013 /* 106 -24 */ CWORD_CWORD_CWORD_CWORD,
1014 /* 107 -23 */ CWORD_CWORD_CWORD_CWORD,
1015 /* 108 -22 */ CWORD_CWORD_CWORD_CWORD,
1016 /* 109 -21 */ CWORD_CWORD_CWORD_CWORD,
1017 /* 110 -20 */ CWORD_CWORD_CWORD_CWORD,
1018 /* 111 -19 */ CWORD_CWORD_CWORD_CWORD,
1019 /* 112 -18 */ CWORD_CWORD_CWORD_CWORD,
1020 /* 113 -17 */ CWORD_CWORD_CWORD_CWORD,
1021 /* 114 -16 */ CWORD_CWORD_CWORD_CWORD,
1022 /* 115 -15 */ CWORD_CWORD_CWORD_CWORD,
1023 /* 116 -14 */ CWORD_CWORD_CWORD_CWORD,
1024 /* 117 -13 */ CWORD_CWORD_CWORD_CWORD,
1025 /* 118 -12 */ CWORD_CWORD_CWORD_CWORD,
1026 /* 119 -11 */ CWORD_CWORD_CWORD_CWORD,
1027 /* 120 -10 */ CWORD_CWORD_CWORD_CWORD,
1028 /* 121 -9 */ CWORD_CWORD_CWORD_CWORD,
1029 /* 122 -8 */ CWORD_CWORD_CWORD_CWORD,
1030 /* 123 -7 */ CWORD_CWORD_CWORD_CWORD,
1031 /* 124 -6 */ CWORD_CWORD_CWORD_CWORD,
1032 /* 125 -5 */ CWORD_CWORD_CWORD_CWORD,
1033 /* 126 -4 */ CWORD_CWORD_CWORD_CWORD,
1034 /* 127 -3 */ CWORD_CWORD_CWORD_CWORD,
1035 /* 128 -2 */ CWORD_CWORD_CWORD_CWORD,
1036 /* 129 -1 */ CWORD_CWORD_CWORD_CWORD,
1037 /* 130 0 */ CWORD_CWORD_CWORD_CWORD,
1038 /* 131 1 */ CWORD_CWORD_CWORD_CWORD,
1039 /* 132 2 */ CWORD_CWORD_CWORD_CWORD,
1040 /* 133 3 */ CWORD_CWORD_CWORD_CWORD,
1041 /* 134 4 */ CWORD_CWORD_CWORD_CWORD,
1042 /* 135 5 */ CWORD_CWORD_CWORD_CWORD,
1043 /* 136 6 */ CWORD_CWORD_CWORD_CWORD,
1044 /* 137 7 */ CWORD_CWORD_CWORD_CWORD,
1045 /* 138 8 */ CWORD_CWORD_CWORD_CWORD,
1046 /* 139 9 "\t" */ CSPCL_CWORD_CWORD_CWORD,
1047 /* 140 10 "\n" */ CNL_CNL_CNL_CNL,
1048 /* 141 11 */ CWORD_CWORD_CWORD_CWORD,
1049 /* 142 12 */ CWORD_CWORD_CWORD_CWORD,
1050 /* 143 13 */ CWORD_CWORD_CWORD_CWORD,
1051 /* 144 14 */ CWORD_CWORD_CWORD_CWORD,
1052 /* 145 15 */ CWORD_CWORD_CWORD_CWORD,
1053 /* 146 16 */ CWORD_CWORD_CWORD_CWORD,
1054 /* 147 17 */ CWORD_CWORD_CWORD_CWORD,
1055 /* 148 18 */ CWORD_CWORD_CWORD_CWORD,
1056 /* 149 19 */ CWORD_CWORD_CWORD_CWORD,
1057 /* 150 20 */ CWORD_CWORD_CWORD_CWORD,
1058 /* 151 21 */ CWORD_CWORD_CWORD_CWORD,
1059 /* 152 22 */ CWORD_CWORD_CWORD_CWORD,
1060 /* 153 23 */ CWORD_CWORD_CWORD_CWORD,
1061 /* 154 24 */ CWORD_CWORD_CWORD_CWORD,
1062 /* 155 25 */ CWORD_CWORD_CWORD_CWORD,
1063 /* 156 26 */ CWORD_CWORD_CWORD_CWORD,
1064 /* 157 27 */ CWORD_CWORD_CWORD_CWORD,
1065 /* 158 28 */ CWORD_CWORD_CWORD_CWORD,
1066 /* 159 29 */ CWORD_CWORD_CWORD_CWORD,
1067 /* 160 30 */ CWORD_CWORD_CWORD_CWORD,
1068 /* 161 31 */ CWORD_CWORD_CWORD_CWORD,
1069 /* 162 32 " " */ CSPCL_CWORD_CWORD_CWORD,
1070 /* 163 33 "!" */ CWORD_CCTL_CCTL_CWORD,
1071 /* 164 34 """ */ CDQUOTE_CENDQUOTE_CWORD_CWORD,
1072 /* 165 35 "#" */ CWORD_CWORD_CWORD_CWORD,
1073 /* 166 36 "$" */ CVAR_CVAR_CWORD_CVAR,
1074 /* 167 37 "%" */ CWORD_CWORD_CWORD_CWORD,
1075 /* 168 38 "&" */ CSPCL_CWORD_CWORD_CWORD,
1076 /* 169 39 "'" */ CSQUOTE_CWORD_CENDQUOTE_CWORD,
1077 /* 170 40 "(" */ CSPCL_CWORD_CWORD_CLP,
1078 /* 171 41 ")" */ CSPCL_CWORD_CWORD_CRP,
1079 /* 172 42 "*" */ CWORD_CCTL_CCTL_CWORD,
1080 /* 173 43 "+" */ CWORD_CWORD_CWORD_CWORD,
1081 /* 174 44 "," */ CWORD_CWORD_CWORD_CWORD,
1082 /* 175 45 "-" */ CWORD_CCTL_CCTL_CWORD,
1083 /* 176 46 "." */ CWORD_CWORD_CWORD_CWORD,
1084 /* 177 47 "/" */ CWORD_CCTL_CCTL_CWORD,
1085 /* 178 48 "0" */ CWORD_CWORD_CWORD_CWORD,
1086 /* 179 49 "1" */ CWORD_CWORD_CWORD_CWORD,
1087 /* 180 50 "2" */ CWORD_CWORD_CWORD_CWORD,
1088 /* 181 51 "3" */ CWORD_CWORD_CWORD_CWORD,
1089 /* 182 52 "4" */ CWORD_CWORD_CWORD_CWORD,
1090 /* 183 53 "5" */ CWORD_CWORD_CWORD_CWORD,
1091 /* 184 54 "6" */ CWORD_CWORD_CWORD_CWORD,
1092 /* 185 55 "7" */ CWORD_CWORD_CWORD_CWORD,
1093 /* 186 56 "8" */ CWORD_CWORD_CWORD_CWORD,
1094 /* 187 57 "9" */ CWORD_CWORD_CWORD_CWORD,
1095 /* 188 58 ":" */ CWORD_CCTL_CCTL_CWORD,
1096 /* 189 59 ";" */ CSPCL_CWORD_CWORD_CWORD,
1097 /* 190 60 "<" */ CSPCL_CWORD_CWORD_CWORD,
1098 /* 191 61 "=" */ CWORD_CCTL_CCTL_CWORD,
1099 /* 192 62 ">" */ CSPCL_CWORD_CWORD_CWORD,
1100 /* 193 63 "?" */ CWORD_CCTL_CCTL_CWORD,
1101 /* 194 64 "@" */ CWORD_CWORD_CWORD_CWORD,
1102 /* 195 65 "A" */ CWORD_CWORD_CWORD_CWORD,
1103 /* 196 66 "B" */ CWORD_CWORD_CWORD_CWORD,
1104 /* 197 67 "C" */ CWORD_CWORD_CWORD_CWORD,
1105 /* 198 68 "D" */ CWORD_CWORD_CWORD_CWORD,
1106 /* 199 69 "E" */ CWORD_CWORD_CWORD_CWORD,
1107 /* 200 70 "F" */ CWORD_CWORD_CWORD_CWORD,
1108 /* 201 71 "G" */ CWORD_CWORD_CWORD_CWORD,
1109 /* 202 72 "H" */ CWORD_CWORD_CWORD_CWORD,
1110 /* 203 73 "I" */ CWORD_CWORD_CWORD_CWORD,
1111 /* 204 74 "J" */ CWORD_CWORD_CWORD_CWORD,
1112 /* 205 75 "K" */ CWORD_CWORD_CWORD_CWORD,
1113 /* 206 76 "L" */ CWORD_CWORD_CWORD_CWORD,
1114 /* 207 77 "M" */ CWORD_CWORD_CWORD_CWORD,
1115 /* 208 78 "N" */ CWORD_CWORD_CWORD_CWORD,
1116 /* 209 79 "O" */ CWORD_CWORD_CWORD_CWORD,
1117 /* 210 80 "P" */ CWORD_CWORD_CWORD_CWORD,
1118 /* 211 81 "Q" */ CWORD_CWORD_CWORD_CWORD,
1119 /* 212 82 "R" */ CWORD_CWORD_CWORD_CWORD,
1120 /* 213 83 "S" */ CWORD_CWORD_CWORD_CWORD,
1121 /* 214 84 "T" */ CWORD_CWORD_CWORD_CWORD,
1122 /* 215 85 "U" */ CWORD_CWORD_CWORD_CWORD,
1123 /* 216 86 "V" */ CWORD_CWORD_CWORD_CWORD,
1124 /* 217 87 "W" */ CWORD_CWORD_CWORD_CWORD,
1125 /* 218 88 "X" */ CWORD_CWORD_CWORD_CWORD,
1126 /* 219 89 "Y" */ CWORD_CWORD_CWORD_CWORD,
1127 /* 220 90 "Z" */ CWORD_CWORD_CWORD_CWORD,
1128 /* 221 91 "[" */ CWORD_CCTL_CCTL_CWORD,
1129 /* 222 92 "\" */ CBACK_CBACK_CCTL_CBACK,
1130 /* 223 93 "]" */ CWORD_CCTL_CCTL_CWORD,
1131 /* 224 94 "^" */ CWORD_CWORD_CWORD_CWORD,
1132 /* 225 95 "_" */ CWORD_CWORD_CWORD_CWORD,
1133 /* 226 96 "`" */ CBQUOTE_CBQUOTE_CWORD_CBQUOTE,
1134 /* 227 97 "a" */ CWORD_CWORD_CWORD_CWORD,
1135 /* 228 98 "b" */ CWORD_CWORD_CWORD_CWORD,
1136 /* 229 99 "c" */ CWORD_CWORD_CWORD_CWORD,
1137 /* 230 100 "d" */ CWORD_CWORD_CWORD_CWORD,
1138 /* 231 101 "e" */ CWORD_CWORD_CWORD_CWORD,
1139 /* 232 102 "f" */ CWORD_CWORD_CWORD_CWORD,
1140 /* 233 103 "g" */ CWORD_CWORD_CWORD_CWORD,
1141 /* 234 104 "h" */ CWORD_CWORD_CWORD_CWORD,
1142 /* 235 105 "i" */ CWORD_CWORD_CWORD_CWORD,
1143 /* 236 106 "j" */ CWORD_CWORD_CWORD_CWORD,
1144 /* 237 107 "k" */ CWORD_CWORD_CWORD_CWORD,
1145 /* 238 108 "l" */ CWORD_CWORD_CWORD_CWORD,
1146 /* 239 109 "m" */ CWORD_CWORD_CWORD_CWORD,
1147 /* 240 110 "n" */ CWORD_CWORD_CWORD_CWORD,
1148 /* 241 111 "o" */ CWORD_CWORD_CWORD_CWORD,
1149 /* 242 112 "p" */ CWORD_CWORD_CWORD_CWORD,
1150 /* 243 113 "q" */ CWORD_CWORD_CWORD_CWORD,
1151 /* 244 114 "r" */ CWORD_CWORD_CWORD_CWORD,
1152 /* 245 115 "s" */ CWORD_CWORD_CWORD_CWORD,
1153 /* 246 116 "t" */ CWORD_CWORD_CWORD_CWORD,
1154 /* 247 117 "u" */ CWORD_CWORD_CWORD_CWORD,
1155 /* 248 118 "v" */ CWORD_CWORD_CWORD_CWORD,
1156 /* 249 119 "w" */ CWORD_CWORD_CWORD_CWORD,
1157 /* 250 120 "x" */ CWORD_CWORD_CWORD_CWORD,
1158 /* 251 121 "y" */ CWORD_CWORD_CWORD_CWORD,
1159 /* 252 122 "z" */ CWORD_CWORD_CWORD_CWORD,
1160 /* 253 123 "{" */ CWORD_CWORD_CWORD_CWORD,
1161 /* 254 124 "|" */ CSPCL_CWORD_CWORD_CWORD,
1162 /* 255 125 "}" */ CENDVAR_CENDVAR_CWORD_CENDVAR,
1163 /* 256 126 "~" */ CWORD_CCTL_CCTL_CWORD,
1164 /* 257 127 */ CWORD_CWORD_CWORD_CWORD,
1167 #endif /* USE_SIT_FUNCTION */
1169 /* $NetBSD: alias.c,v 1.11 2002/11/24 22:35:38 christos Exp $ */
1174 static int funcblocksize; /* size of structures in function */
1175 static int funcstringsize; /* size of strings in node */
1176 static pointer funcblock; /* block to allocate function from */
1177 static char *funcstring; /* block to allocate strings from */
1179 static const short nodesize[26] = {
1180 SHELL_ALIGN(sizeof (struct ncmd)),
1181 SHELL_ALIGN(sizeof (struct npipe)),
1182 SHELL_ALIGN(sizeof (struct nredir)),
1183 SHELL_ALIGN(sizeof (struct nredir)),
1184 SHELL_ALIGN(sizeof (struct nredir)),
1185 SHELL_ALIGN(sizeof (struct nbinary)),
1186 SHELL_ALIGN(sizeof (struct nbinary)),
1187 SHELL_ALIGN(sizeof (struct nbinary)),
1188 SHELL_ALIGN(sizeof (struct nif)),
1189 SHELL_ALIGN(sizeof (struct nbinary)),
1190 SHELL_ALIGN(sizeof (struct nbinary)),
1191 SHELL_ALIGN(sizeof (struct nfor)),
1192 SHELL_ALIGN(sizeof (struct ncase)),
1193 SHELL_ALIGN(sizeof (struct nclist)),
1194 SHELL_ALIGN(sizeof (struct narg)),
1195 SHELL_ALIGN(sizeof (struct narg)),
1196 SHELL_ALIGN(sizeof (struct nfile)),
1197 SHELL_ALIGN(sizeof (struct nfile)),
1198 SHELL_ALIGN(sizeof (struct nfile)),
1199 SHELL_ALIGN(sizeof (struct nfile)),
1200 SHELL_ALIGN(sizeof (struct nfile)),
1201 SHELL_ALIGN(sizeof (struct ndup)),
1202 SHELL_ALIGN(sizeof (struct ndup)),
1203 SHELL_ALIGN(sizeof (struct nhere)),
1204 SHELL_ALIGN(sizeof (struct nhere)),
1205 SHELL_ALIGN(sizeof (struct nnot)),
1209 static void calcsize(union node *);
1210 static void sizenodelist(struct nodelist *);
1211 static union node *copynode(union node *);
1212 static struct nodelist *copynodelist(struct nodelist *);
1213 static char *nodesavestr(char *);
1217 static void evalstring(char *, int);
1218 union node; /* BLETCH for ansi C */
1219 static void evaltree(union node *, int);
1220 static void evalbackcmd(union node *, struct backcmd *);
1222 /* in_function returns nonzero if we are currently evaluating a function */
1223 #define in_function() funcnest
1224 static int evalskip; /* set if we are skipping commands */
1225 static int skipcount; /* number of levels to skip */
1226 static int funcnest; /* depth of function calls */
1228 /* reasons for skipping commands (see comment on breakcmd routine) */
1235 * This file was generated by the mkbuiltins program.
1239 static int bgcmd(int, char **);
1241 static int breakcmd(int, char **);
1242 static int cdcmd(int, char **);
1243 #ifdef CONFIG_ASH_CMDCMD
1244 static int commandcmd(int, char **);
1246 static int dotcmd(int, char **);
1247 static int evalcmd(int, char **);
1248 static int execcmd(int, char **);
1249 static int exitcmd(int, char **);
1250 static int exportcmd(int, char **);
1251 static int falsecmd(int, char **);
1253 static int fgcmd(int, char **);
1255 #ifdef CONFIG_ASH_GETOPTS
1256 static int getoptscmd(int, char **);
1258 static int hashcmd(int, char **);
1259 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
1260 static int helpcmd(int argc, char **argv);
1263 static int jobscmd(int, char **);
1265 #ifdef CONFIG_ASH_MATH_SUPPORT
1266 static int letcmd(int, char **);
1268 static int localcmd(int, char **);
1269 static int pwdcmd(int, char **);
1270 static int readcmd(int, char **);
1271 static int returncmd(int, char **);
1272 static int setcmd(int, char **);
1273 static int shiftcmd(int, char **);
1274 static int timescmd(int, char **);
1275 static int trapcmd(int, char **);
1276 static int truecmd(int, char **);
1277 static int typecmd(int, char **);
1278 static int umaskcmd(int, char **);
1279 static int unsetcmd(int, char **);
1280 static int waitcmd(int, char **);
1281 static int ulimitcmd(int, char **);
1283 static int killcmd(int, char **);
1286 /* $NetBSD: mail.h,v 1.9 2002/11/24 22:35:40 christos Exp $ */
1288 #ifdef CONFIG_ASH_MAIL
1289 static void chkmail(void);
1290 static void changemail(const char *);
1293 /* $NetBSD: exec.h,v 1.20 2003/01/22 20:36:04 dsl Exp $ */
1295 /* values of cmdtype */
1296 #define CMDUNKNOWN -1 /* no entry in table for command */
1297 #define CMDNORMAL 0 /* command is an executable program */
1298 #define CMDFUNCTION 1 /* command is a shell function */
1299 #define CMDBUILTIN 2 /* command is a shell builtin */
1303 int (*builtin)(int, char **);
1304 /* unsigned flags; */
1307 #ifdef CONFIG_ASH_CMDCMD
1309 # ifdef CONFIG_ASH_ALIAS
1310 # define COMMANDCMD (builtincmd + 7)
1311 # define EXECCMD (builtincmd + 10)
1313 # define COMMANDCMD (builtincmd + 6)
1314 # define EXECCMD (builtincmd + 9)
1317 # ifdef CONFIG_ASH_ALIAS
1318 # define COMMANDCMD (builtincmd + 6)
1319 # define EXECCMD (builtincmd + 9)
1321 # define COMMANDCMD (builtincmd + 5)
1322 # define EXECCMD (builtincmd + 8)
1325 #else /* ! CONFIG_ASH_CMDCMD */
1327 # ifdef CONFIG_ASH_ALIAS
1328 # define EXECCMD (builtincmd + 9)
1330 # define EXECCMD (builtincmd + 8)
1333 # ifdef CONFIG_ASH_ALIAS
1334 # define EXECCMD (builtincmd + 8)
1336 # define EXECCMD (builtincmd + 7)
1339 #endif /* CONFIG_ASH_CMDCMD */
1341 #define BUILTIN_NOSPEC "0"
1342 #define BUILTIN_SPECIAL "1"
1343 #define BUILTIN_REGULAR "2"
1344 #define BUILTIN_SPEC_REG "3"
1345 #define BUILTIN_ASSIGN "4"
1346 #define BUILTIN_SPEC_ASSG "5"
1347 #define BUILTIN_REG_ASSG "6"
1348 #define BUILTIN_SPEC_REG_ASSG "7"
1350 #define IS_BUILTIN_SPECIAL(builtincmd) ((builtincmd)->name[0] & 1)
1351 #define IS_BUILTIN_REGULAR(builtincmd) ((builtincmd)->name[0] & 2)
1353 static const struct builtincmd builtincmd[] = {
1354 { BUILTIN_SPEC_REG ".", dotcmd },
1355 { BUILTIN_SPEC_REG ":", truecmd },
1356 #ifdef CONFIG_ASH_ALIAS
1357 { BUILTIN_REG_ASSG "alias", aliascmd },
1360 { BUILTIN_REGULAR "bg", bgcmd },
1362 { BUILTIN_SPEC_REG "break", breakcmd },
1363 { BUILTIN_REGULAR "cd", cdcmd },
1364 { BUILTIN_NOSPEC "chdir", cdcmd },
1365 #ifdef CONFIG_ASH_CMDCMD
1366 { BUILTIN_REGULAR "command", commandcmd },
1368 { BUILTIN_SPEC_REG "continue", breakcmd },
1369 { BUILTIN_SPEC_REG "eval", evalcmd },
1370 { BUILTIN_SPEC_REG "exec", execcmd },
1371 { BUILTIN_SPEC_REG "exit", exitcmd },
1372 { BUILTIN_SPEC_REG_ASSG "export", exportcmd },
1373 { BUILTIN_REGULAR "false", falsecmd },
1375 { BUILTIN_REGULAR "fg", fgcmd },
1377 #ifdef CONFIG_ASH_GETOPTS
1378 { BUILTIN_REGULAR "getopts", getoptscmd },
1380 { BUILTIN_NOSPEC "hash", hashcmd },
1381 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
1382 { BUILTIN_NOSPEC "help", helpcmd },
1385 { BUILTIN_REGULAR "jobs", jobscmd },
1386 { BUILTIN_REGULAR "kill", killcmd },
1388 #ifdef CONFIG_ASH_MATH_SUPPORT
1389 { BUILTIN_NOSPEC "let", letcmd },
1391 { BUILTIN_ASSIGN "local", localcmd },
1392 { BUILTIN_NOSPEC "pwd", pwdcmd },
1393 { BUILTIN_REGULAR "read", readcmd },
1394 { BUILTIN_SPEC_REG_ASSG "readonly", exportcmd },
1395 { BUILTIN_SPEC_REG "return", returncmd },
1396 { BUILTIN_SPEC_REG "set", setcmd },
1397 { BUILTIN_SPEC_REG "shift", shiftcmd },
1398 { BUILTIN_SPEC_REG "times", timescmd },
1399 { BUILTIN_SPEC_REG "trap", trapcmd },
1400 { BUILTIN_REGULAR "true", truecmd },
1401 { BUILTIN_NOSPEC "type", typecmd },
1402 { BUILTIN_NOSPEC "ulimit", ulimitcmd },
1403 { BUILTIN_REGULAR "umask", umaskcmd },
1404 #ifdef CONFIG_ASH_ALIAS
1405 { BUILTIN_REGULAR "unalias", unaliascmd },
1407 { BUILTIN_SPEC_REG "unset", unsetcmd },
1408 { BUILTIN_REGULAR "wait", waitcmd },
1411 #define NUMBUILTINS (sizeof (builtincmd) / sizeof (struct builtincmd) )
1419 const struct builtincmd *cmd;
1420 struct funcnode *func;
1425 /* action to find_command() */
1426 #define DO_ERR 0x01 /* prints errors */
1427 #define DO_ABS 0x02 /* checks absolute paths */
1428 #define DO_NOFUNC 0x04 /* don't return shell functions, for command */
1429 #define DO_ALTPATH 0x08 /* using alternate path */
1430 #define DO_ALTBLTIN 0x20 /* %builtin in alt. path */
1432 static const char *pathopt; /* set by padvance */
1434 static void shellexec(char **, const char *, int)
1435 __attribute__((__noreturn__));
1436 static char *padvance(const char **, const char *);
1437 static void find_command(char *, struct cmdentry *, int, const char *);
1438 static struct builtincmd *find_builtin(const char *);
1439 static void hashcd(void);
1440 static void changepath(const char *);
1441 static void defun(char *, union node *);
1442 static void unsetfunc(const char *);
1444 #ifdef CONFIG_ASH_MATH_SUPPORT
1445 static int dash_arith(const char *);
1448 /* $NetBSD: init.h,v 1.9 2002/11/24 22:35:40 christos Exp $ */
1450 static void reset(void);
1452 /* $NetBSD: var.h,v 1.21 2003/01/22 20:36:04 dsl Exp $ */
1459 #define VEXPORT 0x01 /* variable is exported */
1460 #define VREADONLY 0x02 /* variable cannot be modified */
1461 #define VSTRFIXED 0x04 /* variable struct is statically allocated */
1462 #define VTEXTFIXED 0x08 /* text is statically allocated */
1463 #define VSTACK 0x10 /* text is allocated on the stack */
1464 #define VUNSET 0x20 /* the variable is not set */
1465 #define VNOFUNC 0x40 /* don't call the callback function */
1466 #define VNOSET 0x80 /* do not set variable - just readonly test */
1467 #define VNOSAVE 0x100 /* when text is on the heap before setvareq */
1471 struct var *next; /* next entry in hash list */
1472 int flags; /* flags are defined above */
1473 const char *text; /* name=value */
1474 void (*func)(const char *);
1475 /* function to be called when */
1476 /* the variable gets set/unset */
1480 struct localvar *next; /* next local variable in list */
1481 struct var *vp; /* the variable that was made local */
1482 int flags; /* saved flags */
1483 const char *text; /* saved text */
1487 static struct localvar *localvars;
1493 #ifdef CONFIG_ASH_GETOPTS
1494 static void getoptsreset(const char *);
1497 #ifdef CONFIG_LOCALE_SUPPORT
1499 static void change_lc_all(const char *value);
1500 static void change_lc_ctype(const char *value);
1505 static const char defpathvar[] = "PATH=/usr/local/bin:/usr/bin:/sbin:/bin";
1507 static const char defifsvar[] = "IFS= \t\n";
1508 #define defifs (defifsvar + 4)
1510 static const char defifs[] = " \t\n";
1514 static struct var varinit[] = {
1516 { 0, VSTRFIXED|VTEXTFIXED, defifsvar, 0 },
1518 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "IFS\0", 0 },
1521 #ifdef CONFIG_ASH_MAIL
1522 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "MAIL\0", changemail },
1523 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "MAILPATH\0", changemail },
1526 { 0, VSTRFIXED|VTEXTFIXED, defpathvar, changepath },
1527 { 0, VSTRFIXED|VTEXTFIXED, "PS1=$ ", 0 },
1528 { 0, VSTRFIXED|VTEXTFIXED, "PS2=> ", 0 },
1529 { 0, VSTRFIXED|VTEXTFIXED, "PS4=+ ", 0 },
1530 #ifdef CONFIG_ASH_GETOPTS
1531 { 0, VSTRFIXED|VTEXTFIXED, "OPTIND=1", getoptsreset },
1533 #ifdef CONFIG_LOCALE_SUPPORT
1534 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "LC_ALL=", change_lc_all},
1535 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "LC_CTYPE=", change_lc_ctype},
1537 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
1538 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "HISTFILE=", NULL},
1542 #define vifs varinit[0]
1543 #ifdef CONFIG_ASH_MAIL
1544 #define vmail (&vifs)[1]
1545 #define vmpath (&vmail)[1]
1549 #define vpath (&vmpath)[1]
1550 #define vps1 (&vpath)[1]
1551 #define vps2 (&vps1)[1]
1552 #define vps4 (&vps2)[1]
1553 #define voptind (&vps4)[1]
1555 #define defpath (defpathvar + 5)
1558 * The following macros access the values of the above variables.
1559 * They have to skip over the name. They return the null string
1560 * for unset variables.
1563 #define ifsval() (vifs.text + 4)
1564 #define ifsset() ((vifs.flags & VUNSET) == 0)
1565 #define mailval() (vmail.text + 5)
1566 #define mpathval() (vmpath.text + 9)
1567 #define pathval() (vpath.text + 5)
1568 #define ps1val() (vps1.text + 4)
1569 #define ps2val() (vps2.text + 4)
1570 #define ps4val() (vps4.text + 4)
1571 #define optindval() (voptind.text + 7)
1573 #define mpathset() ((vmpath.flags & VUNSET) == 0)
1575 static void setvar(const char *, const char *, int);
1576 static void setvareq(char *, int);
1577 static void listsetvar(struct strlist *, int);
1578 static char *lookupvar(const char *);
1579 static char *bltinlookup(const char *);
1580 static char **listvars(int, int, char ***);
1581 #define environment() listvars(VEXPORT, VUNSET, 0)
1582 static int showvars(const char *, int, int);
1583 static void poplocalvars(void);
1584 static int unsetvar(const char *);
1585 #ifdef CONFIG_ASH_GETOPTS
1586 static int setvarsafe(const char *, const char *, int);
1588 static int varcmp(const char *, const char *);
1589 static struct var **hashvar(const char *);
1592 static inline int varequal(const char *a, const char *b) {
1593 return !varcmp(a, b);
1597 static int loopnest; /* current loop nesting level */
1600 * The parsefile structure pointed to by the global variable parsefile
1601 * contains information about the current file being read.
1606 struct redirtab *next;
1611 static struct redirtab *redirlist;
1612 static int nullredirs;
1614 extern char **environ;
1616 /* $NetBSD: output.h,v 1.16 2002/11/24 22:35:42 christos Exp $ */
1619 static void outstr(const char *, FILE *);
1620 static void outcslow(int, FILE *);
1621 static void flushall(void);
1622 static void flushout(FILE *);
1623 static int out1fmt(const char *, ...)
1624 __attribute__((__format__(__printf__,1,2)));
1625 static int fmtstr(char *, size_t, const char *, ...)
1626 __attribute__((__format__(__printf__,3,4)));
1627 static void xwrite(int, const void *, size_t);
1629 static int preverrout_fd; /* save fd2 before print debug if xflag is set. */
1632 static void out1str(const char *p)
1637 static void out2str(const char *p)
1644 * Initialization code.
1648 * This routine initializes the builtin variables.
1659 * PS1 depends on uid
1661 #if defined(CONFIG_FEATURE_COMMAND_EDITING) && defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1662 vps1.text = "PS1=\\w \\$ ";
1665 vps1.text = "PS1=# ";
1668 end = vp + sizeof(varinit) / sizeof(varinit[0]);
1670 vpp = hashvar(vp->text);
1673 } while (++vp < end);
1682 basepf.nextc = basepf.buf = basebuf;
1687 signal(SIGCHLD, SIG_DFL);
1696 for (envp = environ ; *envp ; envp++) {
1697 if (strchr(*envp, '=')) {
1698 setvareq(*envp, VEXPORT|VTEXTFIXED);
1702 snprintf(ppid, sizeof(ppid), "%d", (int) getppid());
1703 setvar("PPID", ppid, 0);
1708 /* PEOF (the end of file marker) */
1711 * The input line number. Input.c just defines this variable, and saves
1712 * and restores it when files are pushed and popped. The user of this
1713 * package must set its value.
1716 static int pgetc(void);
1717 static int pgetc2(void);
1718 static int preadbuffer(void);
1719 static void pungetc(void);
1720 static void pushstring(char *, void *);
1721 static void popstring(void);
1722 static void setinputfile(const char *, int);
1723 static void setinputfd(int, int);
1724 static void setinputstring(char *);
1725 static void popfile(void);
1726 static void popallfiles(void);
1727 static void closescript(void);
1730 /* $NetBSD: jobs.h,v 1.17 2003/01/22 20:36:04 dsl Exp $ */
1733 /* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
1736 #define FORK_NOJOB 2
1738 /* mode flags for showjob(s) */
1739 #define SHOW_PGID 0x01 /* only show pgid - for jobs -p */
1740 #define SHOW_PID 0x04 /* include process pid */
1741 #define SHOW_CHANGED 0x08 /* only jobs whose state has changed */
1745 * A job structure contains information about a job. A job is either a
1746 * single process or a set of processes contained in a pipeline. In the
1747 * latter case, pidlist will be non-NULL, and will point to a -1 terminated
1752 pid_t pid; /* process id */
1753 int status; /* last process status from wait() */
1754 char *cmd; /* text of command being run */
1758 struct procstat ps0; /* status of process */
1759 struct procstat *ps; /* status or processes when more than one */
1761 int stopstatus; /* status of a stopped job */
1764 nprocs: 16, /* number of processes */
1766 #define JOBRUNNING 0 /* at least one proc running */
1767 #define JOBSTOPPED 1 /* all procs are stopped */
1768 #define JOBDONE 2 /* all procs are completed */
1770 sigint: 1, /* job was killed by SIGINT */
1771 jobctl: 1, /* job running under job control */
1773 waited: 1, /* true if this entry has been waited for */
1774 used: 1, /* true if this entry is in used */
1775 changed: 1; /* true if status has changed */
1776 struct job *prev_job; /* previous job */
1779 static pid_t backgndpid; /* pid of last background process */
1780 static int job_warning; /* user was warned about stopped jobs */
1782 static int jobctl; /* true if doing job control */
1785 static struct job *makejob(union node *, int);
1786 static int forkshell(struct job *, union node *, int);
1787 static int waitforjob(struct job *);
1788 static int stoppedjobs(void);
1791 #define setjobctl(on) /* do nothing */
1793 static void setjobctl(int);
1794 static void showjobs(FILE *, int);
1797 /* $NetBSD: main.h,v 1.9 2002/11/24 22:35:41 christos Exp $ */
1800 /* pid of main shell */
1802 /* true if we aren't a child of the main shell */
1803 static int rootshell;
1805 static void readcmdfile(char *);
1806 static void cmdloop(int);
1808 /* $NetBSD: memalloc.h,v 1.13 2003/01/22 20:36:04 dsl Exp $ */
1812 struct stack_block *stackp;
1815 struct stackmark *marknext;
1818 /* minimum size of a block */
1819 #define MINSIZE SHELL_ALIGN(504)
1821 struct stack_block {
1822 struct stack_block *prev;
1823 char space[MINSIZE];
1826 static struct stack_block stackbase;
1827 static struct stack_block *stackp = &stackbase;
1828 static struct stackmark *markp;
1829 static char *stacknxt = stackbase.space;
1830 static size_t stacknleft = MINSIZE;
1831 static char *sstrend = stackbase.space + MINSIZE;
1832 static int herefd = -1;
1835 static pointer ckmalloc(size_t);
1836 static pointer ckrealloc(pointer, size_t);
1837 static char *savestr(const char *);
1838 static pointer stalloc(size_t);
1839 static void stunalloc(pointer);
1840 static void setstackmark(struct stackmark *);
1841 static void popstackmark(struct stackmark *);
1842 static void growstackblock(void);
1843 static void *growstackstr(void);
1844 static char *makestrspace(size_t, char *);
1845 static char *stnputs(const char *, size_t, char *);
1846 static char *stputs(const char *, char *);
1849 static inline char *_STPUTC(char c, char *p) {
1856 #define stackblock() ((void *)stacknxt)
1857 #define stackblocksize() stacknleft
1858 #define STARTSTACKSTR(p) ((p) = stackblock())
1859 #define STPUTC(c, p) ((p) = _STPUTC((c), (p)))
1860 #define CHECKSTRSPACE(n, p) \
1864 size_t m = sstrend - q; \
1866 (p) = makestrspace(l, q); \
1869 #define USTPUTC(c, p) (*p++ = (c))
1870 #define STACKSTRNUL(p) ((p) == sstrend? (p = growstackstr(), *p = '\0') : (*p = '\0'))
1871 #define STUNPUTC(p) (--p)
1872 #define STTOPC(p) p[-1]
1873 #define STADJUST(amount, p) (p += (amount))
1875 #define grabstackstr(p) stalloc((char *)(p) - (char *)stackblock())
1876 #define ungrabstackstr(s, p) stunalloc((s))
1877 #define stackstrend() ((void *)sstrend)
1879 #define ckfree(p) free((pointer)(p))
1881 /* $NetBSD: mystring.h,v 1.10 2002/11/24 22:35:42 christos Exp $ */
1884 #define DOLATSTRLEN 4
1886 static char *prefix(const char *, const char *);
1887 static int number(const char *);
1888 static int is_number(const char *);
1889 static char *single_quote(const char *);
1890 static char *sstrdup(const char *);
1892 #define equal(s1, s2) (strcmp(s1, s2) == 0)
1893 #define scopy(s1, s2) ((void)strcpy(s2, s1))
1895 /* $NetBSD: options.h,v 1.16 2003/01/22 20:36:04 dsl Exp $ */
1898 int nparam; /* # of positional parameters (without $0) */
1899 unsigned char malloc; /* if parameter list dynamically allocated */
1900 char **p; /* parameter list */
1901 #ifdef CONFIG_ASH_GETOPTS
1902 int optind; /* next parameter to be processed by getopts */
1903 int optoff; /* used by getopts */
1908 #define eflag optlist[0]
1909 #define fflag optlist[1]
1910 #define Iflag optlist[2]
1911 #define iflag optlist[3]
1912 #define mflag optlist[4]
1913 #define nflag optlist[5]
1914 #define sflag optlist[6]
1915 #define xflag optlist[7]
1916 #define vflag optlist[8]
1917 #define Cflag optlist[9]
1918 #define aflag optlist[10]
1919 #define bflag optlist[11]
1920 #define uflag optlist[12]
1921 #define qflag optlist[13]
1924 #define nolog optlist[14]
1925 #define debug optlist[15]
1931 /* $NetBSD: options.c,v 1.33 2003/01/22 20:36:04 dsl Exp $ */
1934 static const char *const optletters_optnames[NOPTS] = {
1955 #define optletters(n) optletters_optnames[(n)][0]
1956 #define optnames(n) (&optletters_optnames[(n)][1])
1959 static char optlist[NOPTS];
1962 static char *arg0; /* value of $0 */
1963 static struct shparam shellparam; /* $@ current positional parameters */
1964 static char **argptr; /* argument list for builtin commands */
1965 static char *optionarg; /* set by nextopt (like getopt) */
1966 static char *optptr; /* used by nextopt */
1968 static char *minusc; /* argument to -c option */
1971 static void procargs(int, char **);
1972 static void optschanged(void);
1973 static void setparam(char **);
1974 static void freeparam(volatile struct shparam *);
1975 static int shiftcmd(int, char **);
1976 static int setcmd(int, char **);
1977 static int nextopt(const char *);
1979 /* $NetBSD: redir.h,v 1.14 2002/11/24 22:35:43 christos Exp $ */
1981 /* flags passed to redirect */
1982 #define REDIR_PUSH 01 /* save previous values of file descriptors */
1983 #define REDIR_SAVEFD2 03 /* set preverrout */
1986 static void redirect(union node *, int);
1987 static void popredir(int);
1988 static void clearredir(int);
1989 static int copyfd(int, int);
1990 static int redirectsafe(union node *, int);
1992 /* $NetBSD: show.h,v 1.6 2003/01/22 20:36:04 dsl Exp $ */
1996 static void showtree(union node *);
1997 static void trace(const char *, ...);
1998 static void tracev(const char *, va_list);
1999 static void trargs(char **);
2000 static void trputc(int);
2001 static void trputs(const char *);
2002 static void opentrace(void);
2005 /* $NetBSD: trap.h,v 1.16 2002/11/24 22:35:43 christos Exp $ */
2008 /* trap handler commands */
2009 static char *trap[NSIG];
2010 /* current value of signal */
2011 static char sigmode[NSIG - 1];
2012 /* indicates specified signal received */
2013 static char gotsig[NSIG - 1];
2015 static void clear_traps(void);
2016 static void setsignal(int);
2017 static void ignoresig(int);
2018 static void onsig(int);
2019 static void dotrap(void);
2020 static void setinteractive(int);
2021 static void exitshell(void) __attribute__((__noreturn__));
2022 static int decode_signal(const char *, int);
2025 * This routine is called when an error or an interrupt occurs in an
2026 * interactive shell and control is returned to the main command loop.
2041 parselleft = parsenleft = 0; /* clear input buffer */
2045 /* from parser.c: */
2058 #ifdef CONFIG_ASH_ALIAS
2059 static struct alias *atab[ATABSIZE];
2061 static void setalias(const char *, const char *);
2062 static struct alias *freealias(struct alias *);
2063 static struct alias **__lookupalias(const char *);
2066 setalias(const char *name, const char *val)
2068 struct alias *ap, **app;
2070 app = __lookupalias(name);
2074 if (!(ap->flag & ALIASINUSE)) {
2077 ap->val = savestr(val);
2078 ap->flag &= ~ALIASDEAD;
2081 ap = ckmalloc(sizeof (struct alias));
2082 ap->name = savestr(name);
2083 ap->val = savestr(val);
2092 unalias(const char *name)
2096 app = __lookupalias(name);
2100 *app = freealias(*app);
2111 struct alias *ap, **app;
2115 for (i = 0; i < ATABSIZE; i++) {
2117 for (ap = *app; ap; ap = *app) {
2118 *app = freealias(*app);
2127 static struct alias *
2128 lookupalias(const char *name, int check)
2130 struct alias *ap = *__lookupalias(name);
2132 if (check && ap && (ap->flag & ALIASINUSE))
2138 * TODO - sort output
2141 aliascmd(int argc, char **argv)
2150 for (i = 0; i < ATABSIZE; i++)
2151 for (ap = atab[i]; ap; ap = ap->next) {
2156 while ((n = *++argv) != NULL) {
2157 if ((v = strchr(n+1, '=')) == NULL) { /* n+1: funny ksh stuff */
2158 if ((ap = *__lookupalias(n)) == NULL) {
2159 fprintf(stderr, "%s: %s not found\n", "alias", n);
2173 unaliascmd(int argc, char **argv)
2177 while ((i = nextopt("a")) != '\0') {
2183 for (i = 0; *argptr; argptr++) {
2184 if (unalias(*argptr)) {
2185 fprintf(stderr, "%s: %s not found\n", "unalias", *argptr);
2193 static struct alias *
2194 freealias(struct alias *ap) {
2197 if (ap->flag & ALIASINUSE) {
2198 ap->flag |= ALIASDEAD;
2210 printalias(const struct alias *ap) {
2211 out1fmt("%s=%s\n", ap->name, single_quote(ap->val));
2214 static struct alias **
2215 __lookupalias(const char *name) {
2216 unsigned int hashval;
2223 ch = (unsigned char)*p;
2227 ch = (unsigned char)*++p;
2229 app = &atab[hashval % ATABSIZE];
2231 for (; *app; app = &(*app)->next) {
2232 if (equal(name, (*app)->name)) {
2239 #endif /* CONFIG_ASH_ALIAS */
2242 /* $NetBSD: cd.c,v 1.30 2003/01/22 20:36:03 dsl Exp $ */
2245 * The cd and pwd commands.
2248 #define CD_PHYSICAL 1
2251 static int docd(const char *, int);
2252 static int cdopt(void);
2254 static char *curdir = nullstr; /* current working directory */
2255 static char *physdir = nullstr; /* physical working directory */
2264 while ((i = nextopt("LP"))) {
2266 flags ^= CD_PHYSICAL;
2275 cdcmd(int argc, char **argv)
2287 dest = bltinlookup(homestr);
2288 else if (dest[0] == '-' && dest[1] == '\0') {
2289 dest = bltinlookup("OLDPWD");
2312 if (!(path = bltinlookup("CDPATH"))) {
2320 p = padvance(&path, dest);
2321 if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
2325 if (!docd(p, flags))
2330 error("can't cd to %s", dest);
2333 if (flags & CD_PRINT)
2334 out1fmt(snlfmt, curdir);
2340 * Update curdir (the name of the current directory) in response to a
2344 static inline const char *
2345 updatepwd(const char *dir)
2352 cdcomppath = sstrdup(dir);
2355 if (curdir == nullstr)
2357 new = stputs(curdir, new);
2359 new = makestrspace(strlen(dir) + 2, new);
2360 lim = stackblock() + 1;
2364 if (new > lim && *lim == '/')
2369 if (dir[1] == '/' && dir[2] != '/') {
2375 p = strtok(cdcomppath, "/");
2379 if (p[1] == '.' && p[2] == '\0') {
2386 } else if (p[1] == '\0')
2390 new = stputs(p, new);
2398 return stackblock();
2402 * Actually do the chdir. We also call hashcd to let the routines in exec.c
2403 * know that the current directory has changed.
2407 docd(const char *dest, int flags)
2409 const char *dir = 0;
2412 TRACE(("docd(\"%s\", %d) called\n", dest, flags));
2415 if (!(flags & CD_PHYSICAL)) {
2416 dir = updatepwd(dest);
2431 * Find out what the current directory is. If we already know the current
2432 * directory, this routine returns immediately.
2434 static inline char *
2437 char *dir = getcwd(0, 0);
2438 return dir ? dir : nullstr;
2442 pwdcmd(int argc, char **argv)
2445 const char *dir = curdir;
2449 if (physdir == nullstr)
2453 out1fmt(snlfmt, dir);
2458 setpwd(const char *val, int setold)
2462 oldcur = dir = curdir;
2465 setvar("OLDPWD", oldcur, VEXPORT);
2468 if (physdir != nullstr) {
2469 if (physdir != oldcur)
2473 if (oldcur == val || !val) {
2480 if (oldcur != dir && oldcur != nullstr) {
2485 setvar("PWD", dir, VEXPORT);
2488 /* $NetBSD: error.c,v 1.30 2003/01/22 20:36:03 dsl Exp $ */
2491 * Errors and exceptions.
2495 * Code to handle exceptions in C.
2500 static void exverror(int, const char *, va_list)
2501 __attribute__((__noreturn__));
2504 * Called to raise an exception. Since C doesn't include exceptions, we
2505 * just do a longjmp to the exception handler. The type of exception is
2506 * stored in the global variable "exception".
2513 if (handler == NULL)
2519 longjmp(handler->loc, 1);
2524 * Called from trap.c when a SIGINT is received. (If the user specifies
2525 * that SIGINT is to be trapped or ignored using the trap builtin, then
2526 * this routine is not called.) Suppressint is nonzero when interrupts
2527 * are held using the INTOFF macro. (The test for iflag is just
2528 * defensive programming.)
2538 if (gotsig[SIGINT - 1] && !trap[SIGINT]) {
2539 if (!(rootshell && iflag)) {
2540 signal(SIGINT, SIG_DFL);
2550 exvwarning(const char *msg, va_list ap)
2563 fprintf(errs, fmt, name, startlinno);
2564 vfprintf(errs, msg, ap);
2565 outcslow('\n', errs);
2569 * Exverror is called to raise the error exception. If the second argument
2570 * is not NULL then error prints an error message using printf style
2571 * formatting. It then raises the error exception.
2574 exverror(int cond, const char *msg, va_list ap)
2578 TRACE(("exverror(%d, \"", cond));
2580 TRACE(("\") pid=%d\n", getpid()));
2582 TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
2585 exvwarning(msg, ap);
2594 error(const char *msg, ...)
2599 exverror(EXERROR, msg, ap);
2606 exerror(int cond, const char *msg, ...)
2611 exverror(cond, msg, ap);
2617 * error/warning routines for external builtins
2621 sh_warnx(const char *fmt, ...)
2626 exvwarning(fmt, ap);
2632 * Return a string describing an error. The returned string may be a
2633 * pointer to a static buffer that will be overwritten on the next call.
2634 * Action describes the operation that got the error.
2638 errmsg(int e, const char *em)
2640 if(e == ENOENT || e == ENOTDIR) {
2648 /* $NetBSD: eval.c,v 1.71 2003/01/23 03:33:16 rafal Exp $ */
2651 * Evaluate a command.
2654 /* flags in argument to evaltree */
2655 #define EV_EXIT 01 /* exit after evaluating tree */
2656 #define EV_TESTED 02 /* exit status is checked; ignore -e flag */
2657 #define EV_BACKCMD 04 /* command executing within back quotes */
2660 static void evalloop(union node *, int);
2661 static void evalfor(union node *, int);
2662 static void evalcase(union node *, int);
2663 static void evalsubshell(union node *, int);
2664 static void expredir(union node *);
2665 static void evalpipe(union node *, int);
2666 static void evalcommand(union node *, int);
2667 static int evalbltin(const struct builtincmd *, int, char **);
2668 static int evalfun(struct funcnode *, int, char **, int);
2669 static void prehash(union node *);
2670 static int bltincmd(int, char **);
2673 static const struct builtincmd bltin = {
2679 * Called to reset things after an exception.
2683 * The eval commmand.
2687 evalcmd(int argc, char **argv)
2696 STARTSTACKSTR(concat);
2699 concat = stputs(p, concat);
2700 if ((p = *ap++) == NULL)
2702 STPUTC(' ', concat);
2704 STPUTC('\0', concat);
2705 p = grabstackstr(concat);
2707 evalstring(p, EV_TESTED);
2714 * Execute a command or commands contained in a string.
2718 evalstring(char *s, int flag)
2721 struct stackmark smark;
2723 setstackmark(&smark);
2726 while ((n = parsecmd(0)) != NEOF) {
2728 popstackmark(&smark);
2733 popstackmark(&smark);
2739 * Evaluate a parse tree. The value is left in the global variable
2744 evaltree(union node *n, int flags)
2747 void (*evalfn)(union node *, int);
2751 TRACE(("evaltree(NULL) called\n"));
2754 TRACE(("pid %d, evaltree(%p: %d, %d) called\n",
2755 getpid(), n, n->type, flags));
2759 out1fmt("Node type = %d\n", n->type);
2764 evaltree(n->nnot.com, EV_TESTED);
2765 status = !exitstatus;
2768 expredir(n->nredir.redirect);
2769 status = redirectsafe(n->nredir.redirect, REDIR_PUSH);
2771 evaltree(n->nredir.n, flags & EV_TESTED);
2772 status = exitstatus;
2777 evalfn = evalcommand;
2779 if (eflag && !(flags & EV_TESTED))
2791 evalfn = evalsubshell;
2803 #error NAND + 1 != NOR
2805 #if NOR + 1 != NSEMI
2806 #error NOR + 1 != NSEMI
2808 isor = n->type - NAND;
2811 (flags | ((isor >> 1) - 1)) & EV_TESTED
2813 if (!exitstatus == isor)
2825 evaltree(n->nif.test, EV_TESTED);
2828 if (exitstatus == 0) {
2831 } else if (n->nif.elsepart) {
2832 n = n->nif.elsepart;
2837 defun(n->narg.text, n->narg.next);
2841 exitstatus = status;
2847 if (flags & EV_EXIT || checkexit & exitstatus)
2852 #if !defined(__alpha__) || (defined(__GNUC__) && __GNUC__ >= 3)
2855 void evaltreenr(union node *, int) __attribute__ ((alias("evaltree"),__noreturn__));
2859 evalloop(union node *n, int flags)
2869 evaltree(n->nbinary.ch1, EV_TESTED);
2871 skipping: if (evalskip == SKIPCONT && --skipcount <= 0) {
2875 if (evalskip == SKIPBREAK && --skipcount <= 0)
2880 if (n->type != NWHILE)
2884 evaltree(n->nbinary.ch2, flags);
2885 status = exitstatus;
2890 exitstatus = status;
2896 evalfor(union node *n, int flags)
2898 struct arglist arglist;
2901 struct stackmark smark;
2903 setstackmark(&smark);
2904 arglist.lastp = &arglist.list;
2905 for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
2906 expandarg(argp, &arglist, EXP_FULL | EXP_TILDE | EXP_RECORD);
2911 *arglist.lastp = NULL;
2916 for (sp = arglist.list ; sp ; sp = sp->next) {
2917 setvar(n->nfor.var, sp->text, 0);
2918 evaltree(n->nfor.body, flags);
2920 if (evalskip == SKIPCONT && --skipcount <= 0) {
2924 if (evalskip == SKIPBREAK && --skipcount <= 0)
2931 popstackmark(&smark);
2937 evalcase(union node *n, int flags)
2941 struct arglist arglist;
2942 struct stackmark smark;
2944 setstackmark(&smark);
2945 arglist.lastp = &arglist.list;
2946 expandarg(n->ncase.expr, &arglist, EXP_TILDE);
2948 for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) {
2949 for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
2950 if (casematch(patp, arglist.list->text)) {
2951 if (evalskip == 0) {
2952 evaltree(cp->nclist.body, flags);
2959 popstackmark(&smark);
2965 * Kick off a subshell to evaluate a tree.
2969 evalsubshell(union node *n, int flags)
2972 int backgnd = (n->type == NBACKGND);
2975 expredir(n->nredir.redirect);
2976 if (!backgnd && flags & EV_EXIT && !trap[0])
2980 if (forkshell(jp, n, backgnd) == 0) {
2984 flags &=~ EV_TESTED;
2986 redirect(n->nredir.redirect, 0);
2987 evaltreenr(n->nredir.n, flags);
2992 status = waitforjob(jp);
2993 exitstatus = status;
3000 * Compute the names of the files in a redirection list.
3004 expredir(union node *n)
3008 for (redir = n ; redir ; redir = redir->nfile.next) {
3010 fn.lastp = &fn.list;
3011 switch (redir->type) {
3017 expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR);
3018 redir->nfile.expfname = fn.list->text;
3022 if (redir->ndup.vname) {
3023 expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE);
3024 fixredir(redir, fn.list->text, 1);
3034 * Evaluate a pipeline. All the processes in the pipeline are children
3035 * of the process creating the pipeline. (This differs from some versions
3036 * of the shell, which make the last process in a pipeline the parent
3041 evalpipe(union node *n, int flags)
3044 struct nodelist *lp;
3049 TRACE(("evalpipe(0x%lx) called\n", (long)n));
3051 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
3055 jp = makejob(n, pipelen);
3057 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
3061 if (pipe(pip) < 0) {
3063 error("Pipe call failed");
3066 if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
3079 evaltreenr(lp->n, flags);
3087 if (n->npipe.backgnd == 0) {
3088 exitstatus = waitforjob(jp);
3089 TRACE(("evalpipe: job done exit status %d\n", exitstatus));
3097 * Execute a command inside back quotes. If it's a builtin command, we
3098 * want to save its output in a block obtained from malloc. Otherwise
3099 * we fork off a subprocess and get the output of the command via a pipe.
3100 * Should be called with interrupts off.
3104 evalbackcmd(union node *n, struct backcmd *result)
3116 saveherefd = herefd;
3124 error("Pipe call failed");
3126 if (forkshell(jp, n, FORK_NOJOB) == 0) {
3135 evaltreenr(n, EV_EXIT);
3139 result->fd = pip[0];
3142 herefd = saveherefd;
3144 TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n",
3145 result->fd, result->buf, result->nleft, result->jp));
3148 #ifdef CONFIG_ASH_CMDCMD
3149 static inline char **
3150 parse_command_args(char **argv, const char **path)
3162 if (c == '-' && !*cp) {
3172 /* run 'typecmd' for other options */
3175 } while ((c = *cp++));
3184 * Execute a simple command.
3188 evalcommand(union node *cmd, int flags)
3190 struct stackmark smark;
3192 struct arglist arglist;
3193 struct arglist varlist;
3196 const struct strlist *sp;
3197 struct cmdentry cmdentry;
3206 /* First expand the arguments. */
3207 TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags));
3208 setstackmark(&smark);
3209 back_exitstatus = 0;
3211 cmdentry.cmdtype = CMDBUILTIN;
3212 cmdentry.u.cmd = &bltin;
3213 varlist.lastp = &varlist.list;
3214 *varlist.lastp = NULL;
3215 arglist.lastp = &arglist.list;
3216 *arglist.lastp = NULL;
3219 for (argp = cmd->ncmd.args; argp; argp = argp->narg.next) {
3220 struct strlist **spp;
3222 spp = arglist.lastp;
3223 expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
3224 for (sp = *spp; sp; sp = sp->next)
3228 argv = nargv = stalloc(sizeof (char *) * (argc + 1));
3229 for (sp = arglist.list ; sp ; sp = sp->next) {
3230 TRACE(("evalcommand arg: %s\n", sp->text));
3231 *nargv++ = sp->text;
3236 if (iflag && funcnest == 0 && argc > 0)
3237 lastarg = nargv[-1];
3240 expredir(cmd->ncmd.redirect);
3241 status = redirectsafe(cmd->ncmd.redirect, REDIR_PUSH|REDIR_SAVEFD2);
3244 for (argp = cmd->ncmd.assign; argp; argp = argp->narg.next) {
3245 struct strlist **spp;
3248 spp = varlist.lastp;
3249 expandarg(argp, &varlist, EXP_VARTILDE);
3252 * Modify the command lookup path, if a PATH= assignment
3256 if (varequal(p, path))
3260 /* Print the command if xflag is set. */
3263 const char *p = " %s";
3266 dprintf(preverrout_fd, p, ps4val());
3269 for(n = 0; n < 2; n++) {
3271 dprintf(preverrout_fd, p, sp->text);
3279 xwrite(preverrout_fd, "\n", 1);
3285 /* Now locate the command. */
3287 const char *oldpath;
3288 int cmd_flag = DO_ERR;
3293 find_command(argv[0], &cmdentry, cmd_flag, path);
3294 if (cmdentry.cmdtype == CMDUNKNOWN) {
3300 /* implement bltin and command here */
3301 if (cmdentry.cmdtype != CMDBUILTIN)
3304 spclbltin = IS_BUILTIN_SPECIAL(cmdentry.u.cmd);
3305 if (cmdentry.u.cmd == EXECCMD)
3307 #ifdef CONFIG_ASH_CMDCMD
3308 if (cmdentry.u.cmd == COMMANDCMD) {
3311 nargv = parse_command_args(argv, &path);
3314 argc -= nargv - argv;
3316 cmd_flag |= DO_NOFUNC;
3324 /* We have a redirection error. */
3328 exitstatus = status;
3332 /* Execute the command. */
3333 switch (cmdentry.cmdtype) {
3335 /* Fork off a child process if necessary. */
3336 if (!(flags & EV_EXIT) || trap[0]) {
3338 jp = makejob(cmd, 1);
3339 if (forkshell(jp, cmd, FORK_FG) != 0) {
3340 exitstatus = waitforjob(jp);
3346 listsetvar(varlist.list, VEXPORT|VSTACK);
3347 shellexec(argv, path, cmdentry.u.index);
3351 cmdenviron = varlist.list;
3353 struct strlist *list = cmdenviron;
3355 if (spclbltin > 0 || argc == 0) {
3357 if (cmd_is_exec && argc > 1)
3360 listsetvar(list, i);
3362 if (evalbltin(cmdentry.u.cmd, argc, argv)) {
3377 exit_status = j + 128;
3378 exitstatus = exit_status;
3380 if (i == EXINT || spclbltin > 0) {
3382 longjmp(handler->loc, 1);
3389 listsetvar(varlist.list, 0);
3390 if (evalfun(cmdentry.u.func, argc, argv, flags))
3396 popredir(cmd_is_exec);
3398 /* dsl: I think this is intended to be used to support
3399 * '_' in 'vi' command mode during line editing...
3400 * However I implemented that within libedit itself.
3402 setvar("_", lastarg, 0);
3403 popstackmark(&smark);
3407 evalbltin(const struct builtincmd *cmd, int argc, char **argv) {
3408 char *volatile savecmdname;
3409 struct jmploc *volatile savehandler;
3410 struct jmploc jmploc;
3413 savecmdname = commandname;
3414 if ((i = setjmp(jmploc.loc)))
3416 savehandler = handler;
3418 commandname = argv[0];
3420 optptr = NULL; /* initialize nextopt */
3421 exitstatus = (*cmd->builtin)(argc, argv);
3424 exitstatus |= ferror(stdout);
3425 commandname = savecmdname;
3427 handler = savehandler;
3433 evalfun(struct funcnode *func, int argc, char **argv, int flags)
3435 volatile struct shparam saveparam;
3436 struct localvar *volatile savelocalvars;
3437 struct jmploc *volatile savehandler;
3438 struct jmploc jmploc;
3441 saveparam = shellparam;
3442 savelocalvars = localvars;
3443 if ((e = setjmp(jmploc.loc))) {
3447 savehandler = handler;
3450 shellparam.malloc = 0;
3453 shellparam.nparam = argc - 1;
3454 shellparam.p = argv + 1;
3455 #ifdef CONFIG_ASH_GETOPTS
3456 shellparam.optind = 1;
3457 shellparam.optoff = -1;
3460 evaltree(&func->n, flags & EV_TESTED);
3466 localvars = savelocalvars;
3467 freeparam(&shellparam);
3468 shellparam = saveparam;
3469 handler = savehandler;
3471 if (evalskip == SKIPFUNC) {
3480 * Search for a command. This is called before we fork so that the
3481 * location of the command will be available in the parent as well as
3486 prehash(union node *n)
3488 struct cmdentry entry;
3490 if (n->type == NCMD && n->ncmd.args)
3491 find_command(n->ncmd.args->narg.text, &entry, 0, pathval());
3497 * Builtin commands. Builtin commands whose functions are closely
3498 * tied to evaluation are implemented here.
3506 bltincmd(int argc, char **argv)
3509 * Preserve exitstatus of a previous possible redirection
3512 return back_exitstatus;
3517 * Handle break and continue commands. Break, continue, and return are
3518 * all handled by setting the evalskip flag. The evaluation routines
3519 * above all check this flag, and if it is set they start skipping
3520 * commands rather than executing them. The variable skipcount is
3521 * the number of loops to break/continue, or the number of function
3522 * levels to return. (The latter is always 1.) It should probably
3523 * be an error to break out of more loops than exist, but it isn't
3524 * in the standard shell so we don't make it one here.
3528 breakcmd(int argc, char **argv)
3530 int n = argc > 1 ? number(argv[1]) : 1;
3533 error(illnum, argv[1]);
3537 evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK;
3545 * The return command.
3549 returncmd(int argc, char **argv)
3551 int ret = argc > 1 ? number(argv[1]) : exitstatus;
3554 evalskip = SKIPFUNC;
3559 /* Do what ksh does; skip the rest of the file */
3560 evalskip = SKIPFILE;
3568 falsecmd(int argc, char **argv)
3575 truecmd(int argc, char **argv)
3582 execcmd(int argc, char **argv)
3585 iflag = 0; /* exit on error */
3588 shellexec(argv + 1, pathval(), 0);
3594 /* $NetBSD: exec.c,v 1.35 2003/01/22 20:36:04 dsl Exp $ */
3597 * When commands are first encountered, they are entered in a hash table.
3598 * This ensures that a full path search will not have to be done for them
3599 * on each invocation.
3601 * We should investigate converting to a linear search, even though that
3602 * would make the command name "hash" a misnomer.
3605 #define CMDTABLESIZE 31 /* should be prime */
3606 #define ARB 1 /* actual size determined at run time */
3611 struct tblentry *next; /* next entry in hash chain */
3612 union param param; /* definition of builtin function */
3613 short cmdtype; /* index identifying command */
3614 char rehash; /* if set, cd done since entry created */
3615 char cmdname[ARB]; /* name of command */
3619 static struct tblentry *cmdtable[CMDTABLESIZE];
3620 static int builtinloc = -1; /* index in path of %builtin, or -1 */
3623 static void tryexec(char *, char **, char **);
3624 static void clearcmdentry(int);
3625 static struct tblentry *cmdlookup(const char *, int);
3626 static void delete_cmd_entry(void);
3630 * Exec a program. Never returns. If you change this routine, you may
3631 * have to change the find_command routine as well.
3635 shellexec(char **argv, const char *path, int idx)
3642 envp = environment();
3643 if (strchr(argv[0], '/') != NULL
3644 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3645 || find_applet_by_name(argv[0])
3648 tryexec(argv[0], argv, envp);
3652 while ((cmdname = padvance(&path, argv[0])) != NULL) {
3653 if (--idx < 0 && pathopt == NULL) {
3654 tryexec(cmdname, argv, envp);
3655 if (errno != ENOENT && errno != ENOTDIR)
3662 /* Map to POSIX errors */
3674 TRACE(("shellexec failed for %s, errno %d, suppressint %d\n",
3675 argv[0], e, suppressint ));
3676 exerror(EXEXEC, "%s: %s", argv[0], errmsg(e, E_EXEC));
3682 tryexec(char *cmd, char **argv, char **envp)
3685 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3689 #ifdef CONFIG_FEATURE_SH_APPLETS_ALWAYS_WIN
3690 name = bb_get_last_path_component(name);
3691 if(find_applet_by_name(name) != NULL)
3694 if(strchr(name, '/') == NULL && find_applet_by_name(name) != NULL) {
3703 if(strcmp(name, "busybox")) {
3704 for (ap = argv; *ap; ap++);
3705 ap = new = xmalloc((ap - argv + 2) * sizeof(char *));
3706 *ap++ = cmd = "/bin/busybox";
3707 while ((*ap++ = *argv++));
3711 cmd = "/bin/busybox";
3719 execve(cmd, argv, envp);
3720 } while (errno == EINTR);
3722 execve(cmd, argv, envp);
3726 } else if (errno == ENOEXEC) {
3730 for (ap = argv; *ap; ap++)
3732 ap = new = ckmalloc((ap - argv + 2) * sizeof(char *));
3734 *ap = cmd = (char *)DEFAULT_SHELL;
3737 while ((*ap++ = *argv++))
3747 * Do a path search. The variable path (passed by reference) should be
3748 * set to the start of the path before the first call; padvance will update
3749 * this value as it proceeds. Successive calls to padvance will return
3750 * the possible path expansions in sequence. If an option (indicated by
3751 * a percent sign) appears in the path entry then the global variable
3752 * pathopt will be set to point to it; otherwise pathopt will be set to
3757 padvance(const char **path, const char *name)
3767 for (p = start ; *p && *p != ':' && *p != '%' ; p++);
3768 len = p - start + strlen(name) + 2; /* "2" is for '/' and '\0' */
3769 while (stackblocksize() < len)
3773 memcpy(q, start, p - start);
3781 while (*p && *p != ':') p++;
3787 return stalloc(len);
3791 /*** Command hashing code ***/
3794 printentry(struct tblentry *cmdp)
3800 idx = cmdp->param.index;
3803 name = padvance(&path, cmdp->cmdname);
3805 } while (--idx >= 0);
3806 out1fmt("%s%s\n", name, (cmdp->rehash ? "*" : nullstr));
3811 hashcmd(int argc, char **argv)
3813 struct tblentry **pp;
3814 struct tblentry *cmdp;
3816 struct cmdentry entry;
3819 while ((c = nextopt("r")) != '\0') {
3823 if (*argptr == NULL) {
3824 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
3825 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
3826 if (cmdp->cmdtype == CMDNORMAL)
3833 while ((name = *argptr) != NULL) {
3834 if ((cmdp = cmdlookup(name, 0)) != NULL
3835 && (cmdp->cmdtype == CMDNORMAL
3836 || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0)))
3838 find_command(name, &entry, DO_ERR, pathval());
3839 if (entry.cmdtype == CMDUNKNOWN)
3848 * Resolve a command name. If you change this routine, you may have to
3849 * change the shellexec routine as well.
3853 find_command(char *name, struct cmdentry *entry, int act, const char *path)
3855 struct tblentry *cmdp;
3862 struct builtincmd *bcmd;
3864 /* If name contains a slash, don't use PATH or hash table */
3865 if (strchr(name, '/') != NULL) {
3866 entry->u.index = -1;
3868 while (stat(name, &statb) < 0) {
3873 entry->cmdtype = CMDUNKNOWN;
3877 entry->cmdtype = CMDNORMAL;
3881 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3882 if (find_applet_by_name(name)) {
3883 entry->cmdtype = CMDNORMAL;
3884 entry->u.index = -1;
3889 updatetbl = (path == pathval());
3892 if (strstr(path, "%builtin") != NULL)
3896 /* If name is in the table, check answer will be ok */
3897 if ((cmdp = cmdlookup(name, 0)) != NULL) {
3900 switch (cmdp->cmdtype) {
3918 } else if (cmdp->rehash == 0)
3919 /* if not invalidated by cd, we're done */
3923 /* If %builtin not in path, check for builtin next */
3924 bcmd = find_builtin(name);
3925 if (bcmd && (IS_BUILTIN_REGULAR(bcmd) || (
3926 act & DO_ALTPATH ? !(act & DO_ALTBLTIN) : builtinloc <= 0
3928 goto builtin_success;
3930 /* We have to search path. */
3931 prev = -1; /* where to start */
3932 if (cmdp && cmdp->rehash) { /* doing a rehash */
3933 if (cmdp->cmdtype == CMDBUILTIN)
3936 prev = cmdp->param.index;
3942 while ((fullname = padvance(&path, name)) != NULL) {
3943 stunalloc(fullname);
3946 if (prefix(pathopt, "builtin")) {
3948 goto builtin_success;
3950 } else if (!(act & DO_NOFUNC) &&
3951 prefix(pathopt, "func")) {
3954 /* ignore unimplemented options */
3958 /* if rehash, don't redo absolute path names */
3959 if (fullname[0] == '/' && idx <= prev) {
3962 TRACE(("searchexec \"%s\": no change\n", name));
3965 while (stat(fullname, &statb) < 0) {
3970 if (errno != ENOENT && errno != ENOTDIR)
3974 e = EACCES; /* if we fail, this will be the error */
3975 if (!S_ISREG(statb.st_mode))
3977 if (pathopt) { /* this is a %func directory */
3978 stalloc(strlen(fullname) + 1);
3979 readcmdfile(fullname);
3980 if ((cmdp = cmdlookup(name, 0)) == NULL ||
3981 cmdp->cmdtype != CMDFUNCTION)
3982 error("%s not defined in %s", name, fullname);
3983 stunalloc(fullname);
3986 TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
3988 entry->cmdtype = CMDNORMAL;
3989 entry->u.index = idx;
3993 cmdp = cmdlookup(name, 1);
3994 cmdp->cmdtype = CMDNORMAL;
3995 cmdp->param.index = idx;
4000 /* We failed. If there was an entry for this command, delete it */
4001 if (cmdp && updatetbl)
4004 sh_warnx("%s: %s", name, errmsg(e, E_EXEC));
4005 entry->cmdtype = CMDUNKNOWN;
4010 entry->cmdtype = CMDBUILTIN;
4011 entry->u.cmd = bcmd;
4015 cmdp = cmdlookup(name, 1);
4016 cmdp->cmdtype = CMDBUILTIN;
4017 cmdp->param.cmd = bcmd;
4021 entry->cmdtype = cmdp->cmdtype;
4022 entry->u = cmdp->param;
4027 * Wrapper around strcmp for qsort/bsearch/...
4029 static int pstrcmp(const void *a, const void *b)
4031 return strcmp((const char *) a, (*(const char *const *) b) + 1);
4035 * Search the table of builtin commands.
4038 static struct builtincmd *
4039 find_builtin(const char *name)
4041 struct builtincmd *bp;
4044 name, builtincmd, NUMBUILTINS, sizeof(struct builtincmd),
4053 * Called when a cd is done. Marks all commands so the next time they
4054 * are executed they will be rehashed.
4060 struct tblentry **pp;
4061 struct tblentry *cmdp;
4063 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
4064 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
4065 if (cmdp->cmdtype == CMDNORMAL || (
4066 cmdp->cmdtype == CMDBUILTIN &&
4067 !(IS_BUILTIN_REGULAR(cmdp->param.cmd)) &&
4078 * Fix command hash table when PATH changed.
4079 * Called before PATH is changed. The argument is the new value of PATH;
4080 * pathval() still returns the old value at this point.
4081 * Called with interrupts off.
4085 changepath(const char *newval)
4087 const char *old, *new;
4094 firstchange = 9999; /* assume no change */
4100 if ((*old == '\0' && *new == ':')
4101 || (*old == ':' && *new == '\0'))
4103 old = new; /* ignore subsequent differences */
4107 if (*new == '%' && idx_bltin < 0 && prefix(new + 1, "builtin"))
4114 if (builtinloc < 0 && idx_bltin >= 0)
4115 builtinloc = idx_bltin; /* zap builtins */
4116 if (builtinloc >= 0 && idx_bltin < 0)
4118 clearcmdentry(firstchange);
4119 builtinloc = idx_bltin;
4124 * Clear out command entries. The argument specifies the first entry in
4125 * PATH which has changed.
4129 clearcmdentry(int firstchange)
4131 struct tblentry **tblp;
4132 struct tblentry **pp;
4133 struct tblentry *cmdp;
4136 for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
4138 while ((cmdp = *pp) != NULL) {
4139 if ((cmdp->cmdtype == CMDNORMAL &&
4140 cmdp->param.index >= firstchange)
4141 || (cmdp->cmdtype == CMDBUILTIN &&
4142 builtinloc >= firstchange)) {
4156 * Locate a command in the command hash table. If "add" is nonzero,
4157 * add the command to the table if it is not already present. The
4158 * variable "lastcmdentry" is set to point to the address of the link
4159 * pointing to the entry, so that delete_cmd_entry can delete the
4162 * Interrupts must be off if called with add != 0.
4165 static struct tblentry **lastcmdentry;
4168 static struct tblentry *
4169 cmdlookup(const char *name, int add)
4171 unsigned int hashval;
4173 struct tblentry *cmdp;
4174 struct tblentry **pp;
4177 hashval = (unsigned char)*p << 4;
4179 hashval += (unsigned char)*p++;
4181 pp = &cmdtable[hashval % CMDTABLESIZE];
4182 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
4183 if (equal(cmdp->cmdname, name))
4187 if (add && cmdp == NULL) {
4188 cmdp = *pp = ckmalloc(sizeof (struct tblentry) - ARB
4189 + strlen(name) + 1);
4191 cmdp->cmdtype = CMDUNKNOWN;
4192 strcpy(cmdp->cmdname, name);
4199 * Delete the command entry returned on the last lookup.
4203 delete_cmd_entry(void)
4205 struct tblentry *cmdp;
4208 cmdp = *lastcmdentry;
4209 *lastcmdentry = cmdp->next;
4210 if (cmdp->cmdtype == CMDFUNCTION)
4211 freefunc(cmdp->param.func);
4218 * Add a new command entry, replacing any existing command entry for
4219 * the same name - except special builtins.
4223 addcmdentry(char *name, struct cmdentry *entry)
4225 struct tblentry *cmdp;
4227 cmdp = cmdlookup(name, 1);
4228 if (cmdp->cmdtype == CMDFUNCTION) {
4229 freefunc(cmdp->param.func);
4231 cmdp->cmdtype = entry->cmdtype;
4232 cmdp->param = entry->u;
4237 * Make a copy of a parse tree.
4240 static inline struct funcnode *
4241 copyfunc(union node *n)
4246 funcblocksize = offsetof(struct funcnode, n);
4249 blocksize = funcblocksize;
4250 f = ckmalloc(blocksize + funcstringsize);
4251 funcblock = (char *) f + offsetof(struct funcnode, n);
4252 funcstring = (char *) f + blocksize;
4259 * Define a shell function.
4263 defun(char *name, union node *func)
4265 struct cmdentry entry;
4268 entry.cmdtype = CMDFUNCTION;
4269 entry.u.func = copyfunc(func);
4270 addcmdentry(name, &entry);
4276 * Delete a function if it exists.
4280 unsetfunc(const char *name)
4282 struct tblentry *cmdp;
4284 if ((cmdp = cmdlookup(name, 0)) != NULL &&
4285 cmdp->cmdtype == CMDFUNCTION)
4290 * Locate and print what a word is...
4294 #ifdef CONFIG_ASH_CMDCMD
4296 describe_command(char *command, int describe_command_verbose)
4298 #define describe_command_verbose 1
4300 describe_command(char *command)
4303 struct cmdentry entry;
4304 struct tblentry *cmdp;
4305 #ifdef CONFIG_ASH_ALIAS
4306 const struct alias *ap;
4308 const char *path = pathval();
4310 if (describe_command_verbose) {
4314 /* First look at the keywords */
4315 if (findkwd(command)) {
4316 out1str(describe_command_verbose ? " is a shell keyword" : command);
4320 #ifdef CONFIG_ASH_ALIAS
4321 /* Then look at the aliases */
4322 if ((ap = lookupalias(command, 0)) != NULL) {
4323 if (describe_command_verbose) {
4324 out1fmt(" is an alias for %s", ap->val);
4333 /* Then check if it is a tracked alias */
4334 if ((cmdp = cmdlookup(command, 0)) != NULL) {
4335 entry.cmdtype = cmdp->cmdtype;
4336 entry.u = cmdp->param;
4338 /* Finally use brute force */
4339 find_command(command, &entry, DO_ABS, path);
4342 switch (entry.cmdtype) {
4344 int j = entry.u.index;
4350 p = padvance(&path, command);
4354 if (describe_command_verbose) {
4356 (cmdp ? " a tracked alias for" : nullstr), p
4365 if (describe_command_verbose) {
4366 out1str(" is a shell function");
4373 if (describe_command_verbose) {
4374 out1fmt(" is a %sshell builtin",
4375 IS_BUILTIN_SPECIAL(entry.u.cmd) ?
4376 "special " : nullstr
4384 if (describe_command_verbose) {
4385 out1str(": not found\n");
4391 outstr("\n", stdout);
4396 typecmd(int argc, char **argv)
4401 for (i = 1; i < argc; i++) {
4402 #ifdef CONFIG_ASH_CMDCMD
4403 err |= describe_command(argv[i], 1);
4405 err |= describe_command(argv[i]);
4411 #ifdef CONFIG_ASH_CMDCMD
4413 commandcmd(int argc, char **argv)
4416 int default_path = 0;
4417 int verify_only = 0;
4418 int verbose_verify_only = 0;
4420 while ((c = nextopt("pvV")) != '\0')
4425 "command: nextopt returned character code 0%o\n", c);
4435 verbose_verify_only = 1;
4439 if (default_path + verify_only + verbose_verify_only > 1 ||
4442 "command [-p] command [arg ...]\n"
4443 "command {-v|-V} command\n");
4447 if (verify_only || verbose_verify_only) {
4448 return describe_command(*argptr, verbose_verify_only);
4455 /* $NetBSD: expand.c,v 1.56 2002/11/24 22:35:39 christos Exp $ */
4458 * Routines to expand arguments to commands. We have to deal with
4459 * backquotes, shell variables, and file metacharacters.
4465 #define RMESCAPE_ALLOC 0x1 /* Allocate a new string */
4466 #define RMESCAPE_GLOB 0x2 /* Add backslashes for glob */
4467 #define RMESCAPE_QUOTED 0x4 /* Remove CTLESC unless in quotes */
4468 #define RMESCAPE_GROW 0x8 /* Grow strings instead of stalloc */
4469 #define RMESCAPE_HEAP 0x10 /* Malloc strings instead of stalloc */
4472 * Structure specifying which parts of the string should be searched
4473 * for IFS characters.
4477 struct ifsregion *next; /* next region in list */
4478 int begoff; /* offset of start of region */
4479 int endoff; /* offset of end of region */
4480 int nulonly; /* search for nul bytes only */
4483 /* output of current string */
4484 static char *expdest;
4485 /* list of back quote expressions */
4486 static struct nodelist *argbackq;
4487 /* first struct in list of ifs regions */
4488 static struct ifsregion ifsfirst;
4489 /* last struct in list */
4490 static struct ifsregion *ifslastp;
4491 /* holds expanded arg list */
4492 static struct arglist exparg;
4494 static void argstr(char *, int);
4495 static char *exptilde(char *, char *, int);
4496 static void expbackq(union node *, int, int);
4497 static const char *subevalvar(char *, char *, int, int, int, int, int);
4498 static char *evalvar(char *, int);
4499 static int varisset(char *, int);
4500 static void strtodest(const char *, int, int);
4501 static void memtodest(const char *p, size_t len, int syntax, int quotes);
4502 static void varvalue(char *, int, int);
4503 static void recordregion(int, int, int);
4504 static void removerecordregions(int);
4505 static void ifsbreakup(char *, struct arglist *);
4506 static void ifsfree(void);
4507 static void expandmeta(struct strlist *, int);
4508 static int patmatch(char *, const char *);
4510 static int cvtnum(long);
4511 static size_t esclen(const char *, const char *);
4512 static char *scanleft(char *, char *, char *, char *, int, int);
4513 static char *scanright(char *, char *, char *, char *, int, int);
4514 static void varunset(const char *, const char *, const char *, int)
4515 __attribute__((__noreturn__));
4518 #define pmatch(a, b) !fnmatch((a), (b), 0)
4520 * Prepare a pattern for a expmeta (internal glob(3)) call.
4522 * Returns an stalloced string.
4525 static inline char *
4526 preglob(const char *pattern, int quoted, int flag) {
4527 flag |= RMESCAPE_GLOB;
4529 flag |= RMESCAPE_QUOTED;
4531 return _rmescapes((char *)pattern, flag);
4536 esclen(const char *start, const char *p) {
4539 while (p > start && *--p == CTLESC) {
4547 * Expand shell variables and backquotes inside a here document.
4551 expandhere(union node *arg, int fd)
4554 expandarg(arg, (struct arglist *)NULL, 0);
4555 xwrite(fd, stackblock(), expdest - (char *)stackblock());
4560 * Perform variable substitution and command substitution on an argument,
4561 * placing the resulting list of arguments in arglist. If EXP_FULL is true,
4562 * perform splitting and file name expansion. When arglist is NULL, perform
4563 * here document expansion.
4567 expandarg(union node *arg, struct arglist *arglist, int flag)
4572 argbackq = arg->narg.backquote;
4573 STARTSTACKSTR(expdest);
4574 ifsfirst.next = NULL;
4576 argstr(arg->narg.text, flag);
4577 if (arglist == NULL) {
4578 return; /* here document expanded */
4580 STPUTC('\0', expdest);
4581 p = grabstackstr(expdest);
4582 exparg.lastp = &exparg.list;
4586 if (flag & EXP_FULL) {
4587 ifsbreakup(p, &exparg);
4588 *exparg.lastp = NULL;
4589 exparg.lastp = &exparg.list;
4590 expandmeta(exparg.list, flag);
4592 if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */
4594 sp = (struct strlist *)stalloc(sizeof (struct strlist));
4597 exparg.lastp = &sp->next;
4601 *exparg.lastp = NULL;
4603 *arglist->lastp = exparg.list;
4604 arglist->lastp = exparg.lastp;
4610 * Perform variable and command substitution. If EXP_FULL is set, output CTLESC
4611 * characters to allow for further processing. Otherwise treat
4612 * $@ like $* since no splitting will be performed.
4616 argstr(char *p, int flag)
4618 static const char spclchars[] = {
4626 CTLBACKQ | CTLQUOTE,
4627 #ifdef CONFIG_ASH_MATH_SUPPORT
4632 const char *reject = spclchars;
4634 int quotes = flag & (EXP_FULL | EXP_CASE); /* do CTLESC */
4635 int breakall = flag & EXP_WORD;
4640 if (!(flag & EXP_VARTILDE)) {
4642 } else if (flag & EXP_VARTILDE2) {
4647 if (flag & EXP_TILDE) {
4653 if (*q == CTLESC && (flag & EXP_QWORD))
4656 p = exptilde(p, q, flag);
4659 startloc = expdest - (char *)stackblock();
4661 length += strcspn(p + length, reject);
4663 if (c && (!(c & 0x80)
4664 #ifdef CONFIG_ASH_MATH_SUPPORT
4668 /* c == '=' || c == ':' || c == CTLENDARI */
4673 expdest = stnputs(p, length, expdest);
4674 newloc = expdest - (char *)stackblock();
4675 if (breakall && !inquotes && newloc > startloc) {
4676 recordregion(startloc, newloc, 0);
4687 if (flag & EXP_VARTILDE2) {
4691 flag |= EXP_VARTILDE2;
4696 * sort of a hack - expand tildes in variable
4697 * assignments (after the first '=' and after ':'s).
4706 case CTLENDVAR: /* ??? */
4709 /* "$@" syntax adherence hack */
4712 !memcmp(p, dolatstr, DOLATSTRLEN) &&
4713 (p[4] == CTLQUOTEMARK || (
4714 p[4] == CTLENDVAR &&
4715 p[5] == CTLQUOTEMARK
4718 p = evalvar(p + 1, flag) + 1;
4721 inquotes = !inquotes;
4734 p = evalvar(p, flag);
4738 case CTLBACKQ|CTLQUOTE:
4739 expbackq(argbackq->n, c, quotes);
4740 argbackq = argbackq->next;
4742 #ifdef CONFIG_ASH_MATH_SUPPORT
4755 exptilde(char *startp, char *p, int flag)
4761 int quotes = flag & (EXP_FULL | EXP_CASE);
4766 while ((c = *++p) != '\0') {
4773 if (flag & EXP_VARTILDE)
4783 if (*name == '\0') {
4784 if ((home = lookupvar(homestr)) == NULL)
4787 if ((pw = getpwnam(name)) == NULL)
4794 startloc = expdest - (char *)stackblock();
4795 strtodest(home, SQSYNTAX, quotes);
4796 recordregion(startloc, expdest - (char *)stackblock(), 0);
4805 removerecordregions(int endoff)
4807 if (ifslastp == NULL)
4810 if (ifsfirst.endoff > endoff) {
4811 while (ifsfirst.next != NULL) {
4812 struct ifsregion *ifsp;
4814 ifsp = ifsfirst.next->next;
4815 ckfree(ifsfirst.next);
4816 ifsfirst.next = ifsp;
4819 if (ifsfirst.begoff > endoff)
4822 ifslastp = &ifsfirst;
4823 ifsfirst.endoff = endoff;
4828 ifslastp = &ifsfirst;
4829 while (ifslastp->next && ifslastp->next->begoff < endoff)
4830 ifslastp=ifslastp->next;
4831 while (ifslastp->next != NULL) {
4832 struct ifsregion *ifsp;
4834 ifsp = ifslastp->next->next;
4835 ckfree(ifslastp->next);
4836 ifslastp->next = ifsp;
4839 if (ifslastp->endoff > endoff)
4840 ifslastp->endoff = endoff;
4844 #ifdef CONFIG_ASH_MATH_SUPPORT
4846 * Expand arithmetic expression. Backup to start of expression,
4847 * evaluate, place result in (backed up) result, adjust string position.
4860 * This routine is slightly over-complicated for
4861 * efficiency. Next we scan backwards looking for the
4862 * start of arithmetic.
4864 start = stackblock();
4871 while (*p != CTLARI) {
4875 error("missing CTLARI (shouldn't happen)");
4880 esc = esclen(start, p);
4890 removerecordregions(begoff);
4899 len = cvtnum(dash_arith(p + 2));
4902 recordregion(begoff, begoff + len, 0);
4907 * Expand stuff in backwards quotes.
4911 expbackq(union node *cmd, int quoted, int quotes)
4919 int syntax = quoted? DQSYNTAX : BASESYNTAX;
4920 struct stackmark smark;
4923 setstackmark(&smark);
4925 startloc = dest - (char *)stackblock();
4927 evalbackcmd(cmd, (struct backcmd *) &in);
4928 popstackmark(&smark);
4935 memtodest(p, i, syntax, quotes);
4939 i = safe_read(in.fd, buf, sizeof buf);
4940 TRACE(("expbackq: read returns %d\n", i));
4950 back_exitstatus = waitforjob(in.jp);
4954 /* Eat all trailing newlines */
4956 for (; dest > (char *)stackblock() && dest[-1] == '\n';)
4961 recordregion(startloc, dest - (char *)stackblock(), 0);
4962 TRACE(("evalbackq: size=%d: \"%.*s\"\n",
4963 (dest - (char *)stackblock()) - startloc,
4964 (dest - (char *)stackblock()) - startloc,
4965 stackblock() + startloc));
4970 scanleft(char *startp, char *rmesc, char *rmescend, char *str, int quotes,
4981 const char *s = loc2;
4987 match = pmatch(str, s);
4991 if (quotes && *loc == CTLESC)
5001 scanright(char *startp, char *rmesc, char *rmescend, char *str, int quotes,
5008 for (loc = str - 1, loc2 = rmescend; loc >= startp; loc2--) {
5011 const char *s = loc2;
5016 match = pmatch(str, s);
5023 esc = esclen(startp, loc);
5035 subevalvar(char *p, char *str, int strloc, int subtype, int startloc, int varflags, int quotes)
5039 int saveherefd = herefd;
5040 struct nodelist *saveargbackq = argbackq;
5042 char *rmesc, *rmescend;
5044 char *(*scan)(char *, char *, char *, char *, int , int);
5047 argstr(p, subtype != VSASSIGN && subtype != VSQUESTION ? EXP_CASE : 0);
5048 STPUTC('\0', expdest);
5049 herefd = saveherefd;
5050 argbackq = saveargbackq;
5051 startp = stackblock() + startloc;
5055 setvar(str, startp, 0);
5056 amount = startp - expdest;
5057 STADJUST(amount, expdest);
5061 varunset(p, str, startp, varflags);
5065 subtype -= VSTRIMRIGHT;
5067 if (subtype < 0 || subtype > 3)
5072 rmescend = stackblock() + strloc;
5074 rmesc = _rmescapes(startp, RMESCAPE_ALLOC | RMESCAPE_GROW);
5075 if (rmesc != startp) {
5077 startp = stackblock() + startloc;
5081 str = stackblock() + strloc;
5082 preglob(str, varflags & VSQUOTE, 0);
5084 /* zero = subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX */
5085 zero = subtype >> 1;
5086 /* VSTRIMLEFT/VSTRIMRIGHTMAX -> scanleft */
5087 scan = (subtype & 1) ^ zero ? scanleft : scanright;
5089 loc = scan(startp, rmesc, rmescend, str, quotes, zero);
5092 memmove(startp, loc, str - loc);
5093 loc = startp + (str - loc) - 1;
5096 amount = loc - expdest;
5097 STADJUST(amount, expdest);
5104 * Expand a variable, and return a pointer to the next character in the
5108 evalvar(char *p, int flag)
5122 quotes = flag & (EXP_FULL | EXP_CASE);
5124 subtype = varflags & VSTYPE;
5125 quoted = varflags & VSQUOTE;
5127 easy = (!quoted || (*var == '@' && shellparam.nparam));
5129 startloc = expdest - (char *)stackblock();
5130 p = strchr(p, '=') + 1;
5132 if (!is_name(*var)) {
5133 set = varisset(var, varflags & VSNUL);
5135 if (subtype == VSPLUS)
5138 varvalue(var, quoted, flag);
5139 if (subtype == VSLENGTH) {
5141 expdest - (char *)stackblock() -
5143 STADJUST(-varlen, expdest);
5150 /* jump here after setting a variable with ${var=text} */
5151 val = lookupvar(var);
5152 set = !val || ((varflags & VSNUL) && !*val);
5153 if (subtype == VSPLUS)
5156 varlen = strlen(val);
5157 if (subtype == VSLENGTH)
5160 val, varlen, quoted ? DQSYNTAX : BASESYNTAX,
5167 if (subtype == VSMINUS) {
5171 p, flag | EXP_TILDE |
5172 (quoted ? EXP_QWORD : EXP_WORD)
5181 if (subtype == VSASSIGN || subtype == VSQUESTION) {
5183 if (subevalvar(p, var, 0, subtype, startloc,
5187 * Remove any recorded regions beyond
5190 removerecordregions(startloc);
5201 varunset(p, var, 0, 0);
5203 if (subtype == VSLENGTH) {
5209 if (subtype == VSNORMAL) {
5213 recordregion(startloc, expdest - (char *)stackblock(), quoted);
5222 case VSTRIMRIGHTMAX:
5231 * Terminate the string and start recording the pattern
5234 STPUTC('\0', expdest);
5235 patloc = expdest - (char *)stackblock();
5236 if (subevalvar(p, NULL, patloc, subtype,
5237 startloc, varflags, quotes) == 0) {
5238 int amount = expdest - (
5239 (char *)stackblock() + patloc - 1
5241 STADJUST(-amount, expdest);
5243 /* Remove any recorded regions beyond start of variable */
5244 removerecordregions(startloc);
5249 if (subtype != VSNORMAL) { /* skip to end of alternative */
5252 if ((c = *p++) == CTLESC)
5254 else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) {
5256 argbackq = argbackq->next;
5257 } else if (c == CTLVAR) {
5258 if ((*p++ & VSTYPE) != VSNORMAL)
5260 } else if (c == CTLENDVAR) {
5272 * Test whether a specialized variable is set.
5276 varisset(char *name, int nulok)
5279 return backgndpid != 0;
5280 else if (*name == '@' || *name == '*') {
5281 if (*shellparam.p == NULL)
5287 for (av = shellparam.p; *av; av++)
5292 } else if (is_digit(*name)) {
5294 int num = atoi(name);
5296 if (num > shellparam.nparam)
5302 ap = shellparam.p[num - 1];
5304 if (nulok && (ap == NULL || *ap == '\0'))
5312 * Put a string on the stack.
5316 memtodest(const char *p, size_t len, int syntax, int quotes) {
5319 q = makestrspace(len * 2, q);
5325 if (quotes && (SIT(c, syntax) == CCTL || SIT(c, syntax) == CBACK))
5335 strtodest(const char *p, int syntax, int quotes)
5337 memtodest(p, strlen(p), syntax, quotes);
5342 * Add the value of a specialized variable to the stack string.
5346 varvalue(char *name, int quoted, int flags)
5355 int allow_split = flags & EXP_FULL;
5356 int quotes = flags & (EXP_FULL | EXP_CASE);
5358 syntax = quoted ? DQSYNTAX : BASESYNTAX;
5367 num = shellparam.nparam;
5375 for (i = 0 ; i < NOPTS ; i++) {
5377 STPUTC(optletters(i), expdest);
5381 if (allow_split && quoted) {
5382 sep = 1 << CHAR_BIT;
5387 sep = ifsset() ? ifsval()[0] : ' ';
5389 sepq = (SIT(sep, syntax) == CCTL) || (SIT(sep, syntax) == CBACK);
5392 for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
5393 strtodest(p, syntax, quotes);
5404 strtodest(arg0, syntax, quotes);
5408 if (num > 0 && num <= shellparam.nparam) {
5409 strtodest(shellparam.p[num - 1], syntax, quotes);
5417 * Record the fact that we have to scan this region of the
5418 * string for IFS characters.
5422 recordregion(int start, int end, int nulonly)
5424 struct ifsregion *ifsp;
5426 if (ifslastp == NULL) {
5430 ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion));
5432 ifslastp->next = ifsp;
5436 ifslastp->begoff = start;
5437 ifslastp->endoff = end;
5438 ifslastp->nulonly = nulonly;
5443 * Break the argument string into pieces based upon IFS and add the
5444 * strings to the argument list. The regions of the string to be
5445 * searched for IFS characters have been stored by recordregion.
5448 ifsbreakup(char *string, struct arglist *arglist)
5450 struct ifsregion *ifsp;
5455 const char *ifs, *realifs;
5461 if (ifslastp != NULL) {
5464 realifs = ifsset() ? ifsval() : defifs;
5467 p = string + ifsp->begoff;
5468 nulonly = ifsp->nulonly;
5469 ifs = nulonly ? nullstr : realifs;
5471 while (p < string + ifsp->endoff) {
5475 if (strchr(ifs, *p)) {
5477 ifsspc = (strchr(defifs, *p) != NULL);
5478 /* Ignore IFS whitespace at start */
5479 if (q == start && ifsspc) {
5485 sp = (struct strlist *)stalloc(sizeof *sp);
5487 *arglist->lastp = sp;
5488 arglist->lastp = &sp->next;
5492 if (p >= string + ifsp->endoff) {
5498 if (strchr(ifs, *p) == NULL ) {
5501 } else if (strchr(defifs, *p) == NULL) {
5517 } while ((ifsp = ifsp->next) != NULL);
5526 sp = (struct strlist *)stalloc(sizeof *sp);
5528 *arglist->lastp = sp;
5529 arglist->lastp = &sp->next;
5535 struct ifsregion *p;
5540 struct ifsregion *ifsp;
5546 ifsfirst.next = NULL;
5550 static void expmeta(char *, char *);
5551 static struct strlist *expsort(struct strlist *);
5552 static struct strlist *msort(struct strlist *, int);
5554 static char *expdir;
5558 expandmeta(struct strlist *str, int flag)
5560 static const char metachars[] = {
5563 /* TODO - EXP_REDIR */
5566 struct strlist **savelastp;
5572 if (!strpbrk(str->text, metachars))
5574 savelastp = exparg.lastp;
5577 p = preglob(str->text, 0, RMESCAPE_ALLOC | RMESCAPE_HEAP);
5579 int i = strlen(str->text);
5580 expdir = ckmalloc(i < 2048 ? 2048 : i); /* XXX */
5588 if (exparg.lastp == savelastp) {
5593 *exparg.lastp = str;
5594 rmescapes(str->text);
5595 exparg.lastp = &str->next;
5597 *exparg.lastp = NULL;
5598 *savelastp = sp = expsort(*savelastp);
5599 while (sp->next != NULL)
5601 exparg.lastp = &sp->next;
5608 * Add a file name to the list.
5612 addfname(const char *name)
5616 sp = (struct strlist *)stalloc(sizeof *sp);
5617 sp->text = sstrdup(name);
5619 exparg.lastp = &sp->next;
5624 * Do metacharacter (i.e. *, ?, [...]) expansion.
5628 expmeta(char *enddir, char *name)
5643 for (p = name; *p; p++) {
5644 if (*p == '*' || *p == '?')
5646 else if (*p == '[') {
5653 if (*q == '/' || *q == '\0')
5660 } else if (*p == '\\')
5662 else if (*p == '/') {
5669 if (metaflag == 0) { /* we've reached the end of the file name */
5670 if (enddir != expdir)
5678 if (metaflag == 0 || lstat(expdir, &statb) >= 0)
5689 } while (p < start);
5691 if (enddir == expdir) {
5693 } else if (enddir == expdir + 1 && *expdir == '/') {
5699 if ((dirp = opendir(cp)) == NULL)
5701 if (enddir != expdir)
5703 if (*endname == 0) {
5715 while (! intpending && (dp = readdir(dirp)) != NULL) {
5716 if (dp->d_name[0] == '.' && ! matchdot)
5718 if (pmatch(start, dp->d_name)) {
5720 scopy(dp->d_name, enddir);
5723 for (p = enddir, cp = dp->d_name;
5724 (*p++ = *cp++) != '\0';)
5727 expmeta(p, endname);
5737 * Sort the results of file name expansion. It calculates the number of
5738 * strings to sort and then calls msort (short for merge sort) to do the
5742 static struct strlist *
5743 expsort(struct strlist *str)
5749 for (sp = str ; sp ; sp = sp->next)
5751 return msort(str, len);
5755 static struct strlist *
5756 msort(struct strlist *list, int len)
5758 struct strlist *p, *q = NULL;
5759 struct strlist **lpp;
5767 for (n = half ; --n >= 0 ; ) {
5771 q->next = NULL; /* terminate first half of list */
5772 q = msort(list, half); /* sort first half of list */
5773 p = msort(p, len - half); /* sort second half */
5776 #ifdef CONFIG_LOCALE_SUPPORT
5777 if (strcoll(p->text, q->text) < 0)
5779 if (strcmp(p->text, q->text) < 0)
5784 if ((p = *lpp) == NULL) {
5791 if ((q = *lpp) == NULL) {
5802 * Returns true if the pattern matches the string.
5806 patmatch(char *pattern, const char *string)
5808 return pmatch(preglob(pattern, 0, 0), string);
5813 * Remove any CTLESC characters from a string.
5817 _rmescapes(char *str, int flag)
5820 static const char qchars[] = { CTLESC, CTLQUOTEMARK, 0 };
5825 p = strpbrk(str, qchars);
5831 if (flag & RMESCAPE_ALLOC) {
5832 size_t len = p - str;
5833 size_t fulllen = len + strlen(p) + 1;
5835 if (flag & RMESCAPE_GROW) {
5836 r = makestrspace(fulllen, expdest);
5837 } else if (flag & RMESCAPE_HEAP) {
5838 r = ckmalloc(fulllen);
5840 r = stalloc(fulllen);
5844 q = mempcpy(q, str, len);
5847 inquotes = (flag & RMESCAPE_QUOTED) ^ RMESCAPE_QUOTED;
5848 globbing = flag & RMESCAPE_GLOB;
5849 notescaped = globbing;
5851 if (*p == CTLQUOTEMARK) {
5852 inquotes = ~inquotes;
5854 notescaped = globbing;
5858 /* naked back slash */
5864 if (notescaped && inquotes && *p != '/') {
5868 notescaped = globbing;
5873 if (flag & RMESCAPE_GROW) {
5875 STADJUST(q - r + 1, expdest);
5882 * See if a pattern matches in a case statement.
5886 casematch(union node *pattern, char *val)
5888 struct stackmark smark;
5891 setstackmark(&smark);
5892 argbackq = pattern->narg.backquote;
5893 STARTSTACKSTR(expdest);
5895 argstr(pattern->narg.text, EXP_TILDE | EXP_CASE);
5896 STACKSTRNUL(expdest);
5897 result = patmatch(stackblock(), val);
5898 popstackmark(&smark);
5911 expdest = makestrspace(32, expdest);
5912 len = fmtstr(expdest, 32, "%ld", num);
5913 STADJUST(len, expdest);
5918 varunset(const char *end, const char *var, const char *umsg, int varflags)
5924 msg = "parameter not set";
5926 if (*end == CTLENDVAR) {
5927 if (varflags & VSNUL)
5932 error("%.*s: %s%s", end - var - 1, var, msg, tail);
5936 /* $NetBSD: input.c,v 1.37 2002/11/24 22:35:40 christos Exp $ */
5939 * This implements the input routines used by the parser.
5942 #define EOF_NLEFT -99 /* value of parsenleft when EOF pushed back */
5943 #define IBUFSIZ (BUFSIZ + 1)
5945 static void pushfile(void);
5948 * Read a line from the script.
5951 static inline char *
5952 pfgets(char *line, int len)
5958 while (--nleft > 0) {
5975 * Read a character from the script, returning PEOF on end of file.
5976 * Nul characters in the input are silently discarded.
5979 #define pgetc_as_macro() (--parsenleft >= 0? *parsenextc++ : preadbuffer())
5981 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
5982 #define pgetc_macro() pgetc()
5986 return pgetc_as_macro();
5989 #define pgetc_macro() pgetc_as_macro()
5993 return pgetc_macro();
5999 * Same as pgetc(), but ignores PEOA.
6001 #ifdef CONFIG_ASH_ALIAS
6002 static int pgetc2(void)
6008 } while (c == PEOA);
6012 static inline int pgetc2(void)
6014 return pgetc_macro();
6019 #ifdef CONFIG_FEATURE_COMMAND_EDITING
6020 static const char *cmdedit_prompt;
6021 static inline void putprompt(const char *s)
6026 static inline void putprompt(const char *s)
6036 char *buf = parsefile->buf;
6040 #ifdef CONFIG_FEATURE_COMMAND_EDITING
6041 if (!iflag || parsefile->fd)
6042 nr = safe_read(parsefile->fd, buf, BUFSIZ - 1);
6044 nr = cmdedit_read_input((char *) cmdedit_prompt, buf);
6046 /* Ctrl+C presend */
6051 /* Ctrl+D presend */
6056 nr = safe_read(parsefile->fd, buf, BUFSIZ - 1);
6060 if (parsefile->fd == 0 && errno == EWOULDBLOCK) {
6061 int flags = fcntl(0, F_GETFL, 0);
6062 if (flags >= 0 && flags & O_NONBLOCK) {
6063 flags &=~ O_NONBLOCK;
6064 if (fcntl(0, F_SETFL, flags) >= 0) {
6065 out2str("sh: turning off NDELAY mode\n");
6075 * Refill the input buffer and return the next input character:
6077 * 1) If a string was pushed back on the input, pop it;
6078 * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading
6079 * from a string so we can't refill the buffer, return EOF.
6080 * 3) If the is more stuff in this buffer, use it else call read to fill it.
6081 * 4) Process input up to the next newline, deleting nul characters.
6091 while (parsefile->strpush) {
6092 #ifdef CONFIG_ASH_ALIAS
6093 if (parsenleft == -1 && parsefile->strpush->ap &&
6094 parsenextc[-1] != ' ' && parsenextc[-1] != '\t') {
6099 if (--parsenleft >= 0)
6100 return (*parsenextc++);
6102 if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
6107 if (parselleft <= 0) {
6108 if ((parselleft = preadfd()) <= 0) {
6109 parselleft = parsenleft = EOF_NLEFT;
6116 /* delete nul characters */
6117 for (more = 1; more;) {
6124 parsenleft = q - parsenextc;
6125 more = 0; /* Stop processing here */
6132 if (--parselleft <= 0 && more) {
6133 parsenleft = q - parsenextc - 1;
6144 out2str(parsenextc);
6149 return *parsenextc++;
6153 * Undo the last call to pgetc. Only one character may be pushed back.
6154 * PEOF may be pushed back.
6165 * Push a string back onto the input at this current parsefile level.
6166 * We handle aliases this way.
6169 pushstring(char *s, void *ap)
6176 /*dprintf("*** calling pushstring: %s, %d\n", s, len);*/
6177 if (parsefile->strpush) {
6178 sp = ckmalloc(sizeof (struct strpush));
6179 sp->prev = parsefile->strpush;
6180 parsefile->strpush = sp;
6182 sp = parsefile->strpush = &(parsefile->basestrpush);
6183 sp->prevstring = parsenextc;
6184 sp->prevnleft = parsenleft;
6185 #ifdef CONFIG_ASH_ALIAS
6186 sp->ap = (struct alias *)ap;
6188 ((struct alias *)ap)->flag |= ALIASINUSE;
6200 struct strpush *sp = parsefile->strpush;
6203 #ifdef CONFIG_ASH_ALIAS
6205 if (parsenextc[-1] == ' ' || parsenextc[-1] == '\t') {
6206 checkkwd |= CHKALIAS;
6208 if (sp->string != sp->ap->val) {
6211 sp->ap->flag &= ~ALIASINUSE;
6212 if (sp->ap->flag & ALIASDEAD) {
6213 unalias(sp->ap->name);
6217 parsenextc = sp->prevstring;
6218 parsenleft = sp->prevnleft;
6219 /*dprintf("*** calling popstring: restoring to '%s'\n", parsenextc);*/
6220 parsefile->strpush = sp->prev;
6221 if (sp != &(parsefile->basestrpush))
6227 * Set the input to take input from a file. If push is set, push the
6228 * old input onto the stack first.
6232 setinputfile(const char *fname, int push)
6238 if ((fd = open(fname, O_RDONLY)) < 0)
6239 error("Can't open %s", fname);
6241 fd2 = copyfd(fd, 10);
6244 error("Out of file descriptors");
6247 setinputfd(fd, push);
6253 * Like setinputfile, but takes an open file descriptor. Call this with
6258 setinputfd(int fd, int push)
6260 (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
6266 if (parsefile->buf == NULL)
6267 parsefile->buf = ckmalloc(IBUFSIZ);
6268 parselleft = parsenleft = 0;
6274 * Like setinputfile, but takes input from a string.
6278 setinputstring(char *string)
6282 parsenextc = string;
6283 parsenleft = strlen(string);
6284 parsefile->buf = NULL;
6291 * To handle the "." command, a stack of input files is used. Pushfile
6292 * adds a new entry to the stack and popfile restores the previous level.
6298 struct parsefile *pf;
6300 parsefile->nleft = parsenleft;
6301 parsefile->lleft = parselleft;
6302 parsefile->nextc = parsenextc;
6303 parsefile->linno = plinno;
6304 pf = (struct parsefile *)ckmalloc(sizeof (struct parsefile));
6305 pf->prev = parsefile;
6308 pf->basestrpush.prev = NULL;
6316 struct parsefile *pf = parsefile;
6325 parsefile = pf->prev;
6327 parsenleft = parsefile->nleft;
6328 parselleft = parsefile->lleft;
6329 parsenextc = parsefile->nextc;
6330 plinno = parsefile->linno;
6336 * Return to top level.
6342 while (parsefile != &basepf)
6348 * Close the file(s) that the shell is reading commands from. Called
6349 * after a fork is done.
6356 if (parsefile->fd > 0) {
6357 close(parsefile->fd);
6362 /* $NetBSD: jobs.c,v 1.56 2002/11/25 12:13:03 agc Exp $ */
6364 /* mode flags for set_curjob */
6365 #define CUR_DELETE 2
6366 #define CUR_RUNNING 1
6367 #define CUR_STOPPED 0
6369 /* mode flags for dowait */
6370 #define DOWAIT_NORMAL 0
6371 #define DOWAIT_BLOCK 1
6374 static struct job *jobtab;
6376 static unsigned njobs;
6378 /* pgrp of shell on invocation */
6379 static int initialpgrp;
6380 static int ttyfd = -1;
6383 static struct job *curjob;
6384 /* number of presumed living untracked jobs */
6387 static void set_curjob(struct job *, unsigned);
6389 static int restartjob(struct job *, int);
6390 static void xtcsetpgrp(int, pid_t);
6391 static char *commandtext(union node *);
6392 static void cmdlist(union node *, int);
6393 static void cmdtxt(union node *);
6394 static void cmdputs(const char *);
6395 static void showpipe(struct job *, FILE *);
6397 static int sprint_status(char *, int, int);
6398 static void freejob(struct job *);
6399 static struct job *getjob(const char *, int);
6400 static struct job *growjobtab(void);
6401 static void forkchild(struct job *, union node *, int);
6402 static void forkparent(struct job *, union node *, int, pid_t);
6403 static int dowait(int, struct job *);
6404 static int getstatus(struct job *);
6407 set_curjob(struct job *jp, unsigned mode)
6410 struct job **jpp, **curp;
6412 /* first remove from list */
6413 jpp = curp = &curjob;
6418 jpp = &jp1->prev_job;
6420 *jpp = jp1->prev_job;
6422 /* Then re-insert in correct position */
6430 /* job being deleted */
6433 /* newly created job or backgrounded job,
6434 put after all stopped jobs. */
6438 if (!jp1 || jp1->state != JOBSTOPPED)
6441 jpp = &jp1->prev_job;
6447 /* newly stopped job - becomes curjob */
6448 jp->prev_job = *jpp;
6456 * Turn job control on and off.
6458 * Note: This code assumes that the third arg to ioctl is a character
6459 * pointer, which is true on Berkeley systems but not System V. Since
6460 * System V doesn't have job control yet, this isn't a problem now.
6462 * Called with interrupts off.
6471 if (on == jobctl || rootshell == 0)
6475 ofd = fd = open(_PATH_TTY, O_RDWR);
6478 while (!isatty(fd) && --fd >= 0)
6481 fd = fcntl(fd, F_DUPFD, 10);
6485 fcntl(fd, F_SETFD, FD_CLOEXEC);
6486 do { /* while we are in the background */
6487 if ((pgrp = tcgetpgrp(fd)) < 0) {
6489 sh_warnx("can't access tty; job control turned off");
6493 if (pgrp == getpgrp())
6504 xtcsetpgrp(fd, pgrp);
6506 /* turning job control off */
6509 xtcsetpgrp(fd, pgrp);
6523 killcmd(int argc, char **argv)
6534 "Usage: kill [-s sigspec | -signum | -sigspec] [pid | job]... or\n"
6535 "kill -l [exitstatus]"
6539 if (**++argv == '-') {
6540 signo = decode_signal(*argv + 1, 1);
6544 while ((c = nextopt("ls:")) != '\0')
6554 signo = decode_signal(optionarg, 1);
6557 "invalid signal number or name: %s",
6568 if (!list && signo < 0)
6571 if ((signo < 0 || !*argv) ^ list) {
6579 for (i = 1; i < NSIG; i++) {
6580 name = u_signal_names(0, &i, 1);
6582 out1fmt(snlfmt, name);
6586 name = u_signal_names(*argptr, &signo, -1);
6588 out1fmt(snlfmt, name);
6590 error("invalid signal number or exit status: %s", *argptr);
6596 if (**argv == '%') {
6597 jp = getjob(*argv, 0);
6598 pid = -jp->ps[0].pid;
6600 pid = number(*argv);
6601 if (kill(pid, signo) != 0) {
6611 #if defined(JOBS) || defined(DEBUG)
6613 jobno(const struct job *jp)
6615 return jp - jobtab + 1;
6621 fgcmd(int argc, char **argv)
6628 mode = (**argv == 'f') ? FORK_FG : FORK_BG;
6633 jp = getjob(*argv, 1);
6634 if (mode == FORK_BG) {
6635 set_curjob(jp, CUR_RUNNING);
6636 fprintf(out, "[%d] ", jobno(jp));
6638 outstr(jp->ps->cmd, out);
6640 retval = restartjob(jp, mode);
6641 } while (*argv && *++argv);
6645 static int bgcmd(int, char **) __attribute__((__alias__("fgcmd")));
6649 restartjob(struct job *jp, int mode)
6651 struct procstat *ps;
6657 if (jp->state == JOBDONE)
6659 jp->state = JOBRUNNING;
6661 if (mode == FORK_FG)
6662 xtcsetpgrp(ttyfd, pgid);
6663 killpg(pgid, SIGCONT);
6667 if (WIFSTOPPED(ps->status)) {
6670 } while (ps++, --i);
6672 status = (mode == FORK_FG) ? waitforjob(jp) : 0;
6679 sprint_status(char *s, int status, int sigonly)
6685 if (!WIFEXITED(status)) {
6687 if (WIFSTOPPED(status))
6688 st = WSTOPSIG(status);
6691 st = WTERMSIG(status);
6694 col = fmtstr(s, 16, "Broken pipe");
6700 if (WIFSTOPPED(status))
6705 col = fmtstr(s, 32, u_signal_names(NULL, &st, 0));
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;
7462 lp = n->npipe.cmdlist;
7480 cmdtxt(n->nbinary.ch1);
7496 cmdtxt(n->nif.test);
7499 if (n->nif.elsepart) {
7502 n = n->nif.elsepart;
7518 cmdtxt(n->nbinary.ch1);
7528 cmdputs(n->nfor.var);
7530 cmdlist(n->nfor.args, 1);
7535 cmdputs(n->narg.text);
7539 cmdlist(n->ncmd.args, 1);
7540 cmdlist(n->ncmd.redirect, 0);
7553 cmdputs(n->ncase.expr->narg.text);
7555 for (np = n->ncase.cases; np; np = np->nclist.next) {
7556 cmdtxt(np->nclist.pattern);
7558 cmdtxt(np->nclist.body);
7584 s[0] = n->nfile.fd + '0';
7588 if (n->type == NTOFD || n->type == NFROMFD) {
7589 s[0] = n->ndup.dupfd + '0';
7600 cmdlist(union node *np, int sep)
7602 for (; np; np = np->narg.next) {
7606 if (sep && np->narg.next)
7612 cmdputs(const char *s)
7614 const char *p, *str;
7615 char c, cc[2] = " ";
7619 static const char *const vstype[16] = {
7620 nullstr, "}", "-", "+", "?", "=",
7621 "#", "##", "%", "%%"
7624 nextc = makestrspace((strlen(s) + 1) * 8, cmdnextc);
7626 while ((c = *p++) != 0) {
7634 if ((subtype & VSTYPE) == VSLENGTH)
7638 if (!(subtype & VSQUOTE) != !(quoted & 1)) {
7656 case CTLBACKQ+CTLQUOTE:
7659 #ifdef CONFIG_ASH_MATH_SUPPORT
7674 str = vstype[subtype & VSTYPE];
7675 if (subtype & VSNUL)
7686 /* These can only happen inside quotes */
7698 while ((c = *str++)) {
7703 USTPUTC('"', nextc);
7711 showpipe(struct job *jp, FILE *out)
7713 struct procstat *sp;
7714 struct procstat *spend;
7716 spend = jp->ps + jp->nprocs;
7717 for (sp = jp->ps + 1; sp < spend; sp++)
7718 fprintf(out, " | %s", sp->cmd);
7719 outcslow('\n', out);
7724 xtcsetpgrp(int fd, pid_t pgrp)
7726 if (tcsetpgrp(fd, pgrp))
7727 error("Cannot set tty process group (%m)");
7732 getstatus(struct job *job) {
7736 status = job->ps[job->nprocs - 1].status;
7737 retval = WEXITSTATUS(status);
7738 if (!WIFEXITED(status)) {
7740 retval = WSTOPSIG(status);
7741 if (!WIFSTOPPED(status))
7744 /* XXX: limits number of signals */
7745 retval = WTERMSIG(status);
7747 if (retval == SIGINT)
7753 TRACE(("getstatus: job %d, nproc %d, status %x, retval %x\n",
7754 jobno(job), job->nprocs, status, retval));
7758 #ifdef CONFIG_ASH_MAIL
7759 /* $NetBSD: mail.c,v 1.15 2002/11/24 22:35:40 christos Exp $ */
7762 * Routines to check for mail. (Perhaps make part of main.c?)
7765 #define MAXMBOXES 10
7767 /* times of mailboxes */
7768 static time_t mailtime[MAXMBOXES];
7769 /* Set if MAIL or MAILPATH is changed. */
7770 static int mail_var_path_changed;
7775 * Print appropriate message(s) if mail has arrived.
7776 * If mail_var_path_changed is set,
7777 * then the value of MAIL has mail_var_path_changed,
7778 * so we just update the values.
7788 struct stackmark smark;
7791 setstackmark(&smark);
7792 mpath = mpathset() ? mpathval() : mailval();
7793 for (mtp = mailtime; mtp < mailtime + MAXMBOXES; mtp++) {
7794 p = padvance(&mpath, nullstr);
7799 for (q = p ; *q ; q++);
7804 q[-1] = '\0'; /* delete trailing '/' */
7805 if (stat(p, &statb) < 0) {
7809 if (!mail_var_path_changed && statb.st_mtime != *mtp) {
7812 pathopt ? pathopt : "you have mail"
7815 *mtp = statb.st_mtime;
7817 mail_var_path_changed = 0;
7818 popstackmark(&smark);
7823 changemail(const char *val)
7825 mail_var_path_changed++;
7828 #endif /* CONFIG_ASH_MAIL */
7830 /* $NetBSD: main.c,v 1.46 2002/12/11 19:12:18 christos Exp $ */
7834 static short profile_buf[16384];
7838 static int isloginsh;
7840 static void read_profile(const char *);
7843 * Main routine. We initialize things, parse the arguments, execute
7844 * profiles if we're a login shell, and then call cmdloop to execute
7845 * commands. The setjmp call sets up the location to jump to when an
7846 * exception occurs. When an exception occurs the variable "state"
7847 * is used to figure out how far we had gotten.
7851 ash_main(int argc, char **argv)
7855 struct jmploc jmploc;
7856 struct stackmark smark;
7859 dash_errno = __errno_location();
7863 monitor(4, etext, profile_buf, sizeof profile_buf, 50);
7866 if (setjmp(jmploc.loc)) {
7873 switch (exception) {
7883 status = exitstatus;
7886 exitstatus = status;
7888 if (e == EXEXIT || state == 0 || iflag == 0 || ! rootshell)
7892 outcslow('\n', stderr);
7894 popstackmark(&smark);
7895 FORCEINTON; /* enable interrupts */
7898 else if (state == 2)
7900 else if (state == 3)
7908 trputs("Shell args: "); trargs(argv);
7913 setstackmark(&smark);
7914 procargs(argc, argv);
7915 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
7917 const char *hp = lookupvar("HISTFILE");
7920 hp = lookupvar("HOME");
7922 char *defhp = concat_path_file(hp, ".ash_history");
7923 setvar("HISTFILE", defhp, 0);
7929 if (argv[0] && argv[0][0] == '-')
7933 read_profile("/etc/profile");
7936 read_profile(".profile");
7942 getuid() == geteuid() && getgid() == getegid() &&
7946 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
7947 read_profile(shinit);
7953 evalstring(minusc, 0);
7955 if (sflag || minusc == NULL) {
7956 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
7958 const char *hp = lookupvar("HISTFILE");
7961 load_history ( hp );
7964 state4: /* XXX ??? - why isn't this before the "if" statement */
7972 extern void _mcleanup(void);
7982 * Read and execute commands. "Top" is nonzero for the top level command
7983 * loop; it turns on prompting if the shell is interactive.
7990 struct stackmark smark;
7994 TRACE(("cmdloop(%d) called\n", top));
7995 setstackmark(&smark);
8001 showjobs(stderr, SHOW_CHANGED);
8006 #ifdef CONFIG_ASH_MAIL
8010 n = parsecmd(inter);
8011 /* showtree(n); DEBUG */
8013 if (!top || numeof >= 50)
8015 if (!stoppedjobs()) {
8018 out2str("\nUse \"exit\" to leave shell.\n");
8021 } else if (n != NULL && nflag == 0) {
8022 job_warning = (job_warning == 2) ? 1 : 0;
8026 popstackmark(&smark);
8027 setstackmark(&smark);
8028 if (evalskip == SKIPFILE) {
8033 popstackmark(&smark);
8038 * Read /etc/profile or .profile. Return on error.
8042 read_profile(const char *name)
8049 if ((fd = open(name, O_RDONLY)) >= 0)
8054 /* -q turns off -x and -v just when executing init files */
8057 xflag = 0, xflag_set = 1;
8059 vflag = 0, vflag_set = 1;
8073 * Read a file containing shell functions.
8077 readcmdfile(char *name)
8082 if ((fd = open(name, O_RDONLY)) >= 0)
8085 error("Can't open %s", name);
8093 * Take commands from a file. To be compatible we should do a path
8094 * search for the file, which is necessary to find sub-commands.
8097 static inline char *
8098 find_dot_file(char *name)
8101 const char *path = pathval();
8104 /* don't try this for absolute or relative paths */
8105 if (strchr(name, '/'))
8108 while ((fullname = padvance(&path, name)) != NULL) {
8109 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
8111 * Don't bother freeing here, since it will
8112 * be freed by the caller.
8116 stunalloc(fullname);
8119 /* not found in the PATH */
8120 error(not_found_msg, name);
8125 dotcmd(int argc, char **argv)
8129 if (argc >= 2) { /* That's what SVR2 does */
8131 struct stackmark smark;
8133 setstackmark(&smark);
8134 fullname = find_dot_file(argv[1]);
8135 setinputfile(fullname, 1);
8136 commandname = fullname;
8139 popstackmark(&smark);
8146 exitcmd(int argc, char **argv)
8151 exitstatus = number(argv[1]);
8156 /* $NetBSD: memalloc.c,v 1.27 2003/01/22 20:36:04 dsl Exp $ */
8159 * Same for malloc, realloc, but returns an error when out of space.
8163 ckrealloc(pointer p, size_t nbytes)
8165 p = realloc(p, nbytes);
8167 error(bb_msg_memory_exhausted);
8172 ckmalloc(size_t nbytes)
8174 return ckrealloc(NULL, nbytes);
8178 * Make a copy of a string in safe storage.
8182 savestr(const char *s)
8184 char *p = strdup(s);
8186 error(bb_msg_memory_exhausted);
8192 * Parse trees for commands are allocated in lifo order, so we use a stack
8193 * to make this more efficient, and also to avoid all sorts of exception
8194 * handling code to handle interrupts in the middle of a parse.
8196 * The size 504 was chosen because the Ultrix malloc handles that size
8202 stalloc(size_t nbytes)
8207 aligned = SHELL_ALIGN(nbytes);
8208 if (aligned > stacknleft) {
8211 struct stack_block *sp;
8213 blocksize = aligned;
8214 if (blocksize < MINSIZE)
8215 blocksize = MINSIZE;
8216 len = sizeof(struct stack_block) - MINSIZE + blocksize;
8217 if (len < blocksize)
8218 error(bb_msg_memory_exhausted);
8222 stacknxt = sp->space;
8223 stacknleft = blocksize;
8224 sstrend = stacknxt + blocksize;
8229 stacknxt += aligned;
8230 stacknleft -= aligned;
8236 stunalloc(pointer p)
8239 if (!p || (stacknxt < (char *)p) || ((char *)p < stackp->space)) {
8240 write(2, "stunalloc\n", 10);
8244 stacknleft += stacknxt - (char *)p;
8250 setstackmark(struct stackmark *mark)
8252 mark->stackp = stackp;
8253 mark->stacknxt = stacknxt;
8254 mark->stacknleft = stacknleft;
8255 mark->marknext = markp;
8261 popstackmark(struct stackmark *mark)
8263 struct stack_block *sp;
8266 markp = mark->marknext;
8267 while (stackp != mark->stackp) {
8272 stacknxt = mark->stacknxt;
8273 stacknleft = mark->stacknleft;
8274 sstrend = mark->stacknxt + mark->stacknleft;
8280 * When the parser reads in a string, it wants to stick the string on the
8281 * stack and only adjust the stack pointer when it knows how big the
8282 * string is. Stackblock (defined in stack.h) returns a pointer to a block
8283 * of space on top of the stack and stackblocklen returns the length of
8284 * this block. Growstackblock will grow this space by at least one byte,
8285 * possibly moving it (like realloc). Grabstackblock actually allocates the
8286 * part of the block that has been used.
8290 growstackblock(void)
8294 newlen = stacknleft * 2;
8295 if (newlen < stacknleft)
8296 error(bb_msg_memory_exhausted);
8300 if (stacknxt == stackp->space && stackp != &stackbase) {
8301 struct stack_block *oldstackp;
8302 struct stackmark *xmark;
8303 struct stack_block *sp;
8304 struct stack_block *prevstackp;
8310 prevstackp = sp->prev;
8311 grosslen = newlen + sizeof(struct stack_block) - MINSIZE;
8312 sp = ckrealloc((pointer)sp, grosslen);
8313 sp->prev = prevstackp;
8315 stacknxt = sp->space;
8316 stacknleft = newlen;
8317 sstrend = sp->space + newlen;
8320 * Stack marks pointing to the start of the old block
8321 * must be relocated to point to the new block
8324 while (xmark != NULL && xmark->stackp == oldstackp) {
8325 xmark->stackp = stackp;
8326 xmark->stacknxt = stacknxt;
8327 xmark->stacknleft = stacknleft;
8328 xmark = xmark->marknext;
8332 char *oldspace = stacknxt;
8333 int oldlen = stacknleft;
8334 char *p = stalloc(newlen);
8336 /* free the space we just allocated */
8337 stacknxt = memcpy(p, oldspace, oldlen);
8338 stacknleft += newlen;
8343 grabstackblock(size_t len)
8345 len = SHELL_ALIGN(len);
8351 * The following routines are somewhat easier to use than the above.
8352 * The user declares a variable of type STACKSTR, which may be declared
8353 * to be a register. The macro STARTSTACKSTR initializes things. Then
8354 * the user uses the macro STPUTC to add characters to the string. In
8355 * effect, STPUTC(c, p) is the same as *p++ = c except that the stack is
8356 * grown as necessary. When the user is done, she can just leave the
8357 * string there and refer to it using stackblock(). Or she can allocate
8358 * the space for it using grabstackstr(). If it is necessary to allow
8359 * someone else to use the stack temporarily and then continue to grow
8360 * the string, the user should use grabstack to allocate the space, and
8361 * then call ungrabstr(p) to return to the previous mode of operation.
8363 * USTPUTC is like STPUTC except that it doesn't check for overflow.
8364 * CHECKSTACKSPACE can be called before USTPUTC to ensure that there
8365 * is space for at least one character.
8371 size_t len = stackblocksize();
8372 if (herefd >= 0 && len >= 1024) {
8373 xwrite(herefd, stackblock(), len);
8374 return stackblock();
8377 return stackblock() + len;
8381 * Called from CHECKSTRSPACE.
8385 makestrspace(size_t newlen, char *p)
8387 size_t len = p - stacknxt;
8388 size_t size = stackblocksize();
8393 size = stackblocksize();
8395 if (nleft >= newlen)
8399 return stackblock() + len;
8403 stnputs(const char *s, size_t n, char *p)
8405 p = makestrspace(n, p);
8406 p = mempcpy(p, s, n);
8411 stputs(const char *s, char *p)
8413 return stnputs(s, strlen(s), p);
8416 /* $NetBSD: mystring.c,v 1.15 2002/11/24 22:35:42 christos Exp $ */
8421 * number(s) Convert a string of digits to an integer.
8422 * is_number(s) Return true if s is a string of digits.
8426 * prefix -- see if pfx is a prefix of string.
8430 prefix(const char *string, const char *pfx)
8433 if (*pfx++ != *string++)
8436 return (char *) string;
8441 * Convert a string of digits to an integer, printing an error message on
8446 number(const char *s)
8456 * Check for a valid number. This should be elsewhere.
8460 is_number(const char *p)
8465 } while (*++p != '\0');
8471 * Produce a possibly single quoted string suitable as input to the shell.
8472 * The return string is allocated on the stack.
8476 single_quote(const char *s) {
8485 len = strchrnul(s, '\'') - s;
8487 q = p = makestrspace(len + 3, p);
8490 q = mempcpy(q, s, len);
8496 len = strspn(s, "'");
8500 q = p = makestrspace(len + 3, p);
8503 q = mempcpy(q, s, len);
8512 return stackblock();
8516 * Like strdup but works with the ash stack.
8520 sstrdup(const char *p)
8522 size_t len = strlen(p) + 1;
8523 return memcpy(stalloc(len), p, len);
8528 calcsize(union node *n)
8532 funcblocksize += nodesize[n->type];
8535 calcsize(n->ncmd.redirect);
8536 calcsize(n->ncmd.args);
8537 calcsize(n->ncmd.assign);
8540 sizenodelist(n->npipe.cmdlist);
8545 calcsize(n->nredir.redirect);
8546 calcsize(n->nredir.n);
8553 calcsize(n->nbinary.ch2);
8554 calcsize(n->nbinary.ch1);
8557 calcsize(n->nif.elsepart);
8558 calcsize(n->nif.ifpart);
8559 calcsize(n->nif.test);
8562 funcstringsize += strlen(n->nfor.var) + 1;
8563 calcsize(n->nfor.body);
8564 calcsize(n->nfor.args);
8567 calcsize(n->ncase.cases);
8568 calcsize(n->ncase.expr);
8571 calcsize(n->nclist.body);
8572 calcsize(n->nclist.pattern);
8573 calcsize(n->nclist.next);
8577 sizenodelist(n->narg.backquote);
8578 funcstringsize += strlen(n->narg.text) + 1;
8579 calcsize(n->narg.next);
8586 calcsize(n->nfile.fname);
8587 calcsize(n->nfile.next);
8591 calcsize(n->ndup.vname);
8592 calcsize(n->ndup.next);
8596 calcsize(n->nhere.doc);
8597 calcsize(n->nhere.next);
8600 calcsize(n->nnot.com);
8607 sizenodelist(struct nodelist *lp)
8610 funcblocksize += SHELL_ALIGN(sizeof(struct nodelist));
8618 copynode(union node *n)
8625 funcblock = (char *) funcblock + nodesize[n->type];
8628 new->ncmd.redirect = copynode(n->ncmd.redirect);
8629 new->ncmd.args = copynode(n->ncmd.args);
8630 new->ncmd.assign = copynode(n->ncmd.assign);
8633 new->npipe.cmdlist = copynodelist(n->npipe.cmdlist);
8634 new->npipe.backgnd = n->npipe.backgnd;
8639 new->nredir.redirect = copynode(n->nredir.redirect);
8640 new->nredir.n = copynode(n->nredir.n);
8647 new->nbinary.ch2 = copynode(n->nbinary.ch2);
8648 new->nbinary.ch1 = copynode(n->nbinary.ch1);
8651 new->nif.elsepart = copynode(n->nif.elsepart);
8652 new->nif.ifpart = copynode(n->nif.ifpart);
8653 new->nif.test = copynode(n->nif.test);
8656 new->nfor.var = nodesavestr(n->nfor.var);
8657 new->nfor.body = copynode(n->nfor.body);
8658 new->nfor.args = copynode(n->nfor.args);
8661 new->ncase.cases = copynode(n->ncase.cases);
8662 new->ncase.expr = copynode(n->ncase.expr);
8665 new->nclist.body = copynode(n->nclist.body);
8666 new->nclist.pattern = copynode(n->nclist.pattern);
8667 new->nclist.next = copynode(n->nclist.next);
8671 new->narg.backquote = copynodelist(n->narg.backquote);
8672 new->narg.text = nodesavestr(n->narg.text);
8673 new->narg.next = copynode(n->narg.next);
8680 new->nfile.fname = copynode(n->nfile.fname);
8681 new->nfile.fd = n->nfile.fd;
8682 new->nfile.next = copynode(n->nfile.next);
8686 new->ndup.vname = copynode(n->ndup.vname);
8687 new->ndup.dupfd = n->ndup.dupfd;
8688 new->ndup.fd = n->ndup.fd;
8689 new->ndup.next = copynode(n->ndup.next);
8693 new->nhere.doc = copynode(n->nhere.doc);
8694 new->nhere.fd = n->nhere.fd;
8695 new->nhere.next = copynode(n->nhere.next);
8698 new->nnot.com = copynode(n->nnot.com);
8701 new->type = n->type;
8706 static struct nodelist *
8707 copynodelist(struct nodelist *lp)
8709 struct nodelist *start;
8710 struct nodelist **lpp;
8715 funcblock = (char *) funcblock +
8716 SHELL_ALIGN(sizeof(struct nodelist));
8717 (*lpp)->n = copynode(lp->n);
8719 lpp = &(*lpp)->next;
8727 nodesavestr(char *s)
8729 char *rtn = funcstring;
8731 funcstring = stpcpy(funcstring, s) + 1;
8737 * Free a parse tree.
8741 freefunc(struct funcnode *f)
8743 if (f && --f->count < 0)
8748 static void options(int);
8749 static void setoption(int, int);
8753 * Process the shell command line arguments.
8757 procargs(int argc, char **argv)
8760 const char *xminusc;
8767 for (i = 0; i < NOPTS; i++)
8773 if (*xargv == NULL) {
8775 error("-c requires an argument");
8778 if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
8782 for (i = 0; i < NOPTS; i++)
8783 if (optlist[i] == 2)
8788 /* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
8793 } else if (!sflag) {
8794 setinputfile(*xargv, 0);
8800 shellparam.p = xargv;
8801 #ifdef CONFIG_ASH_GETOPTS
8802 shellparam.optind = 1;
8803 shellparam.optoff = -1;
8805 /* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
8807 shellparam.nparam++;
8820 setinteractive(iflag);
8825 minus_o(char *name, int val)
8830 out1str("Current option settings\n");
8831 for (i = 0; i < NOPTS; i++)
8832 out1fmt("%-16s%s\n", optnames(i),
8833 optlist[i] ? "on" : "off");
8835 for (i = 0; i < NOPTS; i++)
8836 if (equal(name, optnames(i))) {
8840 error("Illegal option -o %s", name);
8845 * Process shell options. The global variable argptr contains a pointer
8846 * to the argument list; we advance it past the options.
8850 options(int cmdline)
8858 while ((p = *argptr) != NULL) {
8860 if ((c = *p++) == '-') {
8862 if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
8864 /* "-" means turn off -x and -v */
8867 /* "--" means reset params */
8868 else if (*argptr == NULL)
8871 break; /* "-" or "--" terminates options */
8873 } else if (c == '+') {
8879 while ((c = *p++) != '\0') {
8880 if (c == 'c' && cmdline) {
8881 minusc = p; /* command is after shell args*/
8882 } else if (c == 'o') {
8883 minus_o(*argptr, val);
8886 } else if (cmdline && (c == '-')) { // long options
8887 if (strcmp(p, "login") == 0)
8899 setoption(int flag, int val)
8903 for (i = 0; i < NOPTS; i++)
8904 if (optletters(i) == flag) {
8908 error("Illegal option -%c", flag);
8915 * Set the shell parameters.
8919 setparam(char **argv)
8925 for (nparam = 0 ; argv[nparam] ; nparam++);
8926 ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
8928 *ap++ = savestr(*argv++);
8931 freeparam(&shellparam);
8932 shellparam.malloc = 1;
8933 shellparam.nparam = nparam;
8934 shellparam.p = newparam;
8935 #ifdef CONFIG_ASH_GETOPTS
8936 shellparam.optind = 1;
8937 shellparam.optoff = -1;
8943 * Free the list of positional parameters.
8947 freeparam(volatile struct shparam *param)
8951 if (param->malloc) {
8952 for (ap = param->p ; *ap ; ap++)
8961 * The shift builtin command.
8965 shiftcmd(int argc, char **argv)
8972 n = number(argv[1]);
8973 if (n > shellparam.nparam)
8974 error("can't shift that many");
8976 shellparam.nparam -= n;
8977 for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
8978 if (shellparam.malloc)
8982 while ((*ap2++ = *ap1++) != NULL);
8983 #ifdef CONFIG_ASH_GETOPTS
8984 shellparam.optind = 1;
8985 shellparam.optoff = -1;
8994 * The set command builtin.
8998 setcmd(int argc, char **argv)
9001 return showvars(nullstr, 0, VUNSET);
9005 if (*argptr != NULL) {
9013 #ifdef CONFIG_ASH_GETOPTS
9018 shellparam.optind = number(value);
9019 shellparam.optoff = -1;
9023 #ifdef CONFIG_LOCALE_SUPPORT
9024 static void change_lc_all(const char *value)
9026 if (value != 0 && *value != 0)
9027 setlocale(LC_ALL, value);
9030 static void change_lc_ctype(const char *value)
9032 if (value != 0 && *value != 0)
9033 setlocale(LC_CTYPE, value);
9038 #ifdef CONFIG_ASH_GETOPTS
9040 getopts(char *optstr, char *optvar, char **optfirst, int *param_optind, int *optoff)
9049 if(*param_optind < 1)
9051 optnext = optfirst + *param_optind - 1;
9053 if (*param_optind <= 1 || *optoff < 0 || strlen(optnext[-1]) < *optoff)
9056 p = optnext[-1] + *optoff;
9057 if (p == NULL || *p == '\0') {
9058 /* Current word is done, advance */
9060 if (p == NULL || *p != '-' || *++p == '\0') {
9067 if (p[0] == '-' && p[1] == '\0') /* check for "--" */
9072 for (q = optstr; *q != c; ) {
9074 if (optstr[0] == ':') {
9077 err |= setvarsafe("OPTARG", s, 0);
9079 fprintf(stderr, "Illegal option -%c\n", c);
9080 (void) unsetvar("OPTARG");
9090 if (*p == '\0' && (p = *optnext) == NULL) {
9091 if (optstr[0] == ':') {
9094 err |= setvarsafe("OPTARG", s, 0);
9097 fprintf(stderr, "No arg for -%c option\n", c);
9098 (void) unsetvar("OPTARG");
9106 err |= setvarsafe("OPTARG", p, 0);
9109 err |= setvarsafe("OPTARG", nullstr, 0);
9112 *optoff = p ? p - *(optnext - 1) : -1;
9113 *param_optind = optnext - optfirst + 1;
9114 fmtstr(s, sizeof(s), "%d", *param_optind);
9115 err |= setvarsafe("OPTIND", s, VNOFUNC);
9118 err |= setvarsafe(optvar, s, 0);
9129 * The getopts builtin. Shellparam.optnext points to the next argument
9130 * to be processed. Shellparam.optptr points to the next character to
9131 * be processed in the current argument. If shellparam.optnext is NULL,
9132 * then it's the first time getopts has been called.
9136 getoptscmd(int argc, char **argv)
9141 error("Usage: getopts optstring var [arg]");
9142 else if (argc == 3) {
9143 optbase = shellparam.p;
9144 if (shellparam.optind > shellparam.nparam + 1) {
9145 shellparam.optind = 1;
9146 shellparam.optoff = -1;
9151 if (shellparam.optind > argc - 2) {
9152 shellparam.optind = 1;
9153 shellparam.optoff = -1;
9157 return getopts(argv[1], argv[2], optbase, &shellparam.optind,
9158 &shellparam.optoff);
9160 #endif /* CONFIG_ASH_GETOPTS */
9163 * XXX - should get rid of. have all builtins use getopt(3). the
9164 * library getopt must have the BSD extension static variable "optreset"
9165 * otherwise it can't be used within the shell safely.
9167 * Standard option processing (a la getopt) for builtin routines. The
9168 * only argument that is passed to nextopt is the option string; the
9169 * other arguments are unnecessary. It return the character, or '\0' on
9174 nextopt(const char *optstring)
9180 if ((p = optptr) == NULL || *p == '\0') {
9182 if (p == NULL || *p != '-' || *++p == '\0')
9185 if (p[0] == '-' && p[1] == '\0') /* check for "--" */
9189 for (q = optstring ; *q != c ; ) {
9191 error("Illegal option -%c", c);
9196 if (*p == '\0' && (p = *argptr++) == NULL)
9197 error("No arg for -%c option", c);
9206 /* $NetBSD: output.c,v 1.27 2002/11/24 22:35:42 christos Exp $ */
9209 outstr(const char *p, FILE *file)
9226 flushout(FILE *dest)
9234 outcslow(int c, FILE *dest)
9244 out1fmt(const char *fmt, ...)
9251 r = vprintf(fmt, ap);
9259 fmtstr(char *outbuf, size_t length, const char *fmt, ...)
9266 ret = vsnprintf(outbuf, length, fmt, ap);
9274 * Version of write which resumes after a signal is caught.
9278 xwrite(int fd, const void *p, size_t n)
9283 i = bb_full_write(fd, p, n);
9284 } while (i < 0 && errno == EINTR);
9288 /* $NetBSD: parser.c,v 1.54 2002/11/24 22:35:42 christos Exp $ */
9292 * Shell command parser.
9295 #define EOFMARKLEN 79
9299 struct heredoc *next; /* next here document in list */
9300 union node *here; /* redirection node */
9301 char *eofmark; /* string indicating end of input */
9302 int striptabs; /* if set, strip leading tabs */
9307 static struct heredoc *heredoclist; /* list of here documents to read */
9310 static union node *list(int);
9311 static union node *andor(void);
9312 static union node *pipeline(void);
9313 static union node *command(void);
9314 static union node *simplecmd(void);
9315 static union node *makename(void);
9316 static void parsefname(void);
9317 static void parseheredoc(void);
9318 static char peektoken(void);
9319 static int readtoken(void);
9320 static int xxreadtoken(void);
9321 static int readtoken1(int firstc, int syntax, char *eofmark, int striptabs);
9322 static int noexpand(char *);
9323 static void synexpect(int) __attribute__((__noreturn__));
9324 static void synerror(const char *) __attribute__((__noreturn__));
9325 static void setprompt(int);
9329 goodname(const char *p)
9331 return !*endofname(p);
9335 isassignment(const char *p)
9337 const char *q = endofname(p);
9345 * Read and parse a command. Returns NEOF on end of file. (NULL is a
9346 * valid parse tree indicating a blank line.)
9350 parsecmd(int interact)
9355 doprompt = interact;
9357 setprompt(doprompt);
9372 union node *n1, *n2, *n3;
9375 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9376 if (nlflag == 2 && peektoken())
9382 if (tok == TBACKGND) {
9383 if (n2->type == NPIPE) {
9384 n2->npipe.backgnd = 1;
9386 if (n2->type != NREDIR) {
9387 n3 = stalloc(sizeof(struct nredir));
9389 n3->nredir.redirect = NULL;
9392 n2->type = NBACKGND;
9399 n3 = (union node *)stalloc(sizeof (struct nbinary));
9401 n3->nbinary.ch1 = n1;
9402 n3->nbinary.ch2 = n2;
9418 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9426 pungetc(); /* push back EOF on input */
9442 union node *n1, *n2, *n3;
9447 if ((t = readtoken()) == TAND) {
9449 } else if (t == TOR) {
9455 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9457 n3 = (union node *)stalloc(sizeof (struct nbinary));
9459 n3->nbinary.ch1 = n1;
9460 n3->nbinary.ch2 = n2;
9470 union node *n1, *n2, *pipenode;
9471 struct nodelist *lp, *prev;
9475 TRACE(("pipeline: entered\n"));
9476 if (readtoken() == TNOT) {
9478 checkkwd = CHKKWD | CHKALIAS;
9482 if (readtoken() == TPIPE) {
9483 pipenode = (union node *)stalloc(sizeof (struct npipe));
9484 pipenode->type = NPIPE;
9485 pipenode->npipe.backgnd = 0;
9486 lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
9487 pipenode->npipe.cmdlist = lp;
9491 lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
9492 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9495 } while (readtoken() == TPIPE);
9501 n2 = (union node *)stalloc(sizeof (struct nnot));
9514 union node *n1, *n2;
9515 union node *ap, **app;
9516 union node *cp, **cpp;
9517 union node *redir, **rpp;
9524 switch (readtoken()) {
9529 n1 = (union node *)stalloc(sizeof (struct nif));
9531 n1->nif.test = list(0);
9532 if (readtoken() != TTHEN)
9534 n1->nif.ifpart = list(0);
9536 while (readtoken() == TELIF) {
9537 n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif));
9538 n2 = n2->nif.elsepart;
9540 n2->nif.test = list(0);
9541 if (readtoken() != TTHEN)
9543 n2->nif.ifpart = list(0);
9545 if (lasttoken == TELSE)
9546 n2->nif.elsepart = list(0);
9548 n2->nif.elsepart = NULL;
9556 n1 = (union node *)stalloc(sizeof (struct nbinary));
9557 n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL;
9558 n1->nbinary.ch1 = list(0);
9559 if ((got=readtoken()) != TDO) {
9560 TRACE(("expecting DO got %s %s\n", tokname(got), got == TWORD ? wordtext : ""));
9563 n1->nbinary.ch2 = list(0);
9568 if (readtoken() != TWORD || quoteflag || ! goodname(wordtext))
9569 synerror("Bad for loop variable");
9570 n1 = (union node *)stalloc(sizeof (struct nfor));
9572 n1->nfor.var = wordtext;
9573 checkkwd = CHKKWD | CHKALIAS;
9574 if (readtoken() == TIN) {
9576 while (readtoken() == TWORD) {
9577 n2 = (union node *)stalloc(sizeof (struct narg));
9579 n2->narg.text = wordtext;
9580 n2->narg.backquote = backquotelist;
9582 app = &n2->narg.next;
9586 if (lasttoken != TNL && lasttoken != TSEMI)
9589 n2 = (union node *)stalloc(sizeof (struct narg));
9591 n2->narg.text = (char *)dolatstr;
9592 n2->narg.backquote = NULL;
9593 n2->narg.next = NULL;
9596 * Newline or semicolon here is optional (but note
9597 * that the original Bourne shell only allowed NL).
9599 if (lasttoken != TNL && lasttoken != TSEMI)
9602 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9603 if (readtoken() != TDO)
9605 n1->nfor.body = list(0);
9609 n1 = (union node *)stalloc(sizeof (struct ncase));
9611 if (readtoken() != TWORD)
9613 n1->ncase.expr = n2 = (union node *)stalloc(sizeof (struct narg));
9615 n2->narg.text = wordtext;
9616 n2->narg.backquote = backquotelist;
9617 n2->narg.next = NULL;
9619 checkkwd = CHKKWD | CHKALIAS;
9620 } while (readtoken() == TNL);
9621 if (lasttoken != TIN)
9623 cpp = &n1->ncase.cases;
9625 checkkwd = CHKNL | CHKKWD;
9628 if (lasttoken == TLP)
9630 *cpp = cp = (union node *)stalloc(sizeof (struct nclist));
9632 app = &cp->nclist.pattern;
9634 *app = ap = (union node *)stalloc(sizeof (struct narg));
9636 ap->narg.text = wordtext;
9637 ap->narg.backquote = backquotelist;
9638 if (readtoken() != TPIPE)
9640 app = &ap->narg.next;
9643 ap->narg.next = NULL;
9644 if (lasttoken != TRP)
9646 cp->nclist.body = list(2);
9648 cpp = &cp->nclist.next;
9650 checkkwd = CHKNL | CHKKWD;
9651 if ((t = readtoken()) != TESAC) {
9653 synexpect(TENDCASE);
9661 n1 = (union node *)stalloc(sizeof (struct nredir));
9662 n1->type = NSUBSHELL;
9663 n1->nredir.n = list(0);
9664 n1->nredir.redirect = NULL;
9677 if (readtoken() != t)
9681 /* Now check for redirection which may follow command */
9682 checkkwd = CHKKWD | CHKALIAS;
9684 while (readtoken() == TREDIR) {
9685 *rpp = n2 = redirnode;
9686 rpp = &n2->nfile.next;
9692 if (n1->type != NSUBSHELL) {
9693 n2 = (union node *)stalloc(sizeof (struct nredir));
9698 n1->nredir.redirect = redir;
9707 union node *args, **app;
9708 union node *n = NULL;
9709 union node *vars, **vpp;
9710 union node **rpp, *redir;
9720 savecheckkwd = CHKALIAS;
9722 checkkwd = savecheckkwd;
9723 switch (readtoken()) {
9725 n = (union node *)stalloc(sizeof (struct narg));
9727 n->narg.text = wordtext;
9728 n->narg.backquote = backquotelist;
9729 if (savecheckkwd && isassignment(wordtext)) {
9731 vpp = &n->narg.next;
9734 app = &n->narg.next;
9739 *rpp = n = redirnode;
9740 rpp = &n->nfile.next;
9741 parsefname(); /* read name of redirection file */
9745 args && app == &args->narg.next &&
9748 struct builtincmd *bcmd;
9751 /* We have a function */
9752 if (readtoken() != TRP)
9754 name = n->narg.text;
9756 !goodname(name) || (
9757 (bcmd = find_builtin(name)) &&
9758 IS_BUILTIN_SPECIAL(bcmd)
9761 synerror("Bad function name");
9763 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9764 n->narg.next = command();
9777 n = (union node *)stalloc(sizeof (struct ncmd));
9779 n->ncmd.args = args;
9780 n->ncmd.assign = vars;
9781 n->ncmd.redirect = redir;
9790 n = (union node *)stalloc(sizeof (struct narg));
9792 n->narg.next = NULL;
9793 n->narg.text = wordtext;
9794 n->narg.backquote = backquotelist;
9798 void fixredir(union node *n, const char *text, int err)
9800 TRACE(("Fix redir %s %d\n", text, err));
9802 n->ndup.vname = NULL;
9804 if (is_digit(text[0]) && text[1] == '\0')
9805 n->ndup.dupfd = digit_val(text[0]);
9806 else if (text[0] == '-' && text[1] == '\0')
9811 synerror("Bad fd number");
9813 n->ndup.vname = makename();
9821 union node *n = redirnode;
9823 if (readtoken() != TWORD)
9825 if (n->type == NHERE) {
9826 struct heredoc *here = heredoc;
9832 TRACE(("Here document %d\n", n->type));
9833 if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN)
9834 synerror("Illegal eof marker for << redirection");
9835 rmescapes(wordtext);
9836 here->eofmark = wordtext;
9838 if (heredoclist == NULL)
9841 for (p = heredoclist ; p->next ; p = p->next);
9844 } else if (n->type == NTOFD || n->type == NFROMFD) {
9845 fixredir(n, wordtext, 0);
9847 n->nfile.fname = makename();
9853 * Input any here documents.
9859 struct heredoc *here;
9870 readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX,
9871 here->eofmark, here->striptabs);
9872 n = (union node *)stalloc(sizeof (struct narg));
9873 n->narg.type = NARG;
9874 n->narg.next = NULL;
9875 n->narg.text = wordtext;
9876 n->narg.backquote = backquotelist;
9877 here->here->nhere.doc = n;
9882 static char peektoken(void)
9888 return tokname_array[t][0];
9896 int alreadyseen = tokpushback;
9899 #ifdef CONFIG_ASH_ALIAS
9908 if (checkkwd & CHKNL) {
9915 if (t != TWORD || quoteflag) {
9920 * check for keywords
9922 if (checkkwd & CHKKWD) {
9923 const char *const *pp;
9925 if ((pp = findkwd(wordtext))) {
9926 lasttoken = t = pp - tokname_array;
9927 TRACE(("keyword %s recognized\n", tokname(t)));
9932 if (checkkwd & CHKALIAS) {
9933 #ifdef CONFIG_ASH_ALIAS
9935 if ((ap = lookupalias(wordtext, 1)) != NULL) {
9937 pushstring(ap->val, ap);
9947 TRACE(("token %s %s\n", tokname(t), t == TWORD ? wordtext : ""));
9949 TRACE(("reread token %s %s\n", tokname(t), t == TWORD ? wordtext : ""));
9956 * Read the next input token.
9957 * If the token is a word, we set backquotelist to the list of cmds in
9958 * backquotes. We set quoteflag to true if any part of the word was
9960 * If the token is TREDIR, then we set redirnode to a structure containing
9962 * In all cases, the variable startlinno is set to the number of the line
9963 * on which the token starts.
9965 * [Change comment: here documents and internal procedures]
9966 * [Readtoken shouldn't have any arguments. Perhaps we should make the
9967 * word parsing code into a separate routine. In this case, readtoken
9968 * doesn't need to have any internal procedures, but parseword does.
9969 * We could also make parseoperator in essence the main routine, and
9970 * have parseword (readtoken1?) handle both words and redirection.]
9973 #define NEW_xxreadtoken
9974 #ifdef NEW_xxreadtoken
9976 /* singles must be first! */
9977 static const char xxreadtoken_chars[7] = { '\n', '(', ')', '&', '|', ';', 0 };
9979 static const char xxreadtoken_tokens[] = {
9980 TNL, TLP, TRP, /* only single occurrence allowed */
9981 TBACKGND, TPIPE, TSEMI, /* if single occurrence */
9982 TEOF, /* corresponds to trailing nul */
9983 TAND, TOR, TENDCASE, /* if double occurrence */
9986 #define xxreadtoken_doubles \
9987 (sizeof(xxreadtoken_tokens) - sizeof(xxreadtoken_chars))
9988 #define xxreadtoken_singles \
9989 (sizeof(xxreadtoken_chars) - xxreadtoken_doubles - 1)
9991 static int xxreadtoken()
10003 startlinno = plinno;
10004 for (;;) { /* until token or start of word found */
10007 if ((c != ' ') && (c != '\t')
10008 #ifdef CONFIG_ASH_ALIAS
10013 while ((c = pgetc()) != '\n' && c != PEOF);
10015 } else if (c == '\\') {
10016 if (pgetc() != '\n') {
10020 startlinno = ++plinno;
10025 = xxreadtoken_chars + sizeof(xxreadtoken_chars) - 1;
10030 needprompt = doprompt;
10033 p = strchr(xxreadtoken_chars, c);
10036 return readtoken1(c, BASESYNTAX, (char *) NULL, 0);
10039 if (p - xxreadtoken_chars >= xxreadtoken_singles) {
10040 if (pgetc() == *p) { /* double occurrence? */
10041 p += xxreadtoken_doubles + 1;
10048 return lasttoken = xxreadtoken_tokens[p - xxreadtoken_chars];
10056 #define RETURN(token) return lasttoken = token
10071 startlinno = plinno;
10072 for (;;) { /* until token or start of word found */
10075 case ' ': case '\t':
10076 #ifdef CONFIG_ASH_ALIAS
10081 while ((c = pgetc()) != '\n' && c != PEOF);
10085 if (pgetc() == '\n') {
10086 startlinno = ++plinno;
10095 needprompt = doprompt;
10100 if (pgetc() == '&')
10105 if (pgetc() == '|')
10110 if (pgetc() == ';')
10123 return readtoken1(c, BASESYNTAX, (char *)NULL, 0);
10126 #endif /* NEW_xxreadtoken */
10130 * If eofmark is NULL, read a word or a redirection symbol. If eofmark
10131 * is not NULL, read a here document. In the latter case, eofmark is the
10132 * word which marks the end of the document and striptabs is true if
10133 * leading tabs should be stripped from the document. The argument firstc
10134 * is the first character of the input token or document.
10136 * Because C does not have internal subroutines, I have simulated them
10137 * using goto's to implement the subroutine linkage. The following macros
10138 * will run code that appears at the end of readtoken1.
10141 #define CHECKEND() {goto checkend; checkend_return:;}
10142 #define PARSEREDIR() {goto parseredir; parseredir_return:;}
10143 #define PARSESUB() {goto parsesub; parsesub_return:;}
10144 #define PARSEBACKQOLD() {oldstyle = 1; goto parsebackq; parsebackq_oldreturn:;}
10145 #define PARSEBACKQNEW() {oldstyle = 0; goto parsebackq; parsebackq_newreturn:;}
10146 #define PARSEARITH() {goto parsearith; parsearith_return:;}
10149 readtoken1(int firstc, int syntax, char *eofmark, int striptabs)
10154 char line[EOFMARKLEN + 1];
10155 struct nodelist *bqlist;
10158 int varnest; /* levels of variables expansion */
10159 int arinest; /* levels of arithmetic expansion */
10160 int parenlevel; /* levels of parens in arithmetic */
10161 int dqvarnest; /* levels of variables expansion within double quotes */
10163 int prevsyntax; /* syntax before arithmetic */
10165 /* Avoid longjmp clobbering */
10171 (void) &parenlevel;
10174 (void) &prevsyntax;
10178 startlinno = plinno;
10180 if (syntax == DQSYNTAX)
10189 STARTSTACKSTR(out);
10190 loop: { /* for each line, until end of word */
10191 CHECKEND(); /* set c to PEOF if at end of here document */
10192 for (;;) { /* until end of line or end of word */
10193 CHECKSTRSPACE(4, out); /* permit 4 calls to USTPUTC */
10194 switch(SIT(c, syntax)) {
10195 case CNL: /* '\n' */
10196 if (syntax == BASESYNTAX)
10197 goto endword; /* exit outer loop */
10203 goto loop; /* continue outer loop */
10208 if (eofmark == NULL || dblquote)
10209 USTPUTC(CTLESC, out);
10212 case CBACK: /* backslash */
10215 USTPUTC(CTLESC, out);
10216 USTPUTC('\\', out);
10218 } else if (c == '\n') {
10224 c != '\\' && c != '`' &&
10230 USTPUTC(CTLESC, out);
10231 USTPUTC('\\', out);
10233 if (SIT(c, SQSYNTAX) == CCTL)
10234 USTPUTC(CTLESC, out);
10242 if (eofmark == NULL) {
10243 USTPUTC(CTLQUOTEMARK, out);
10251 if (eofmark != NULL && arinest == 0 &&
10255 if (dqvarnest == 0) {
10256 syntax = BASESYNTAX;
10263 case CVAR: /* '$' */
10264 PARSESUB(); /* parse substitution */
10266 case CENDVAR: /* '}' */
10269 if (dqvarnest > 0) {
10272 USTPUTC(CTLENDVAR, out);
10277 #ifdef CONFIG_ASH_MATH_SUPPORT
10278 case CLP: /* '(' in arithmetic */
10282 case CRP: /* ')' in arithmetic */
10283 if (parenlevel > 0) {
10287 if (pgetc() == ')') {
10288 if (--arinest == 0) {
10289 USTPUTC(CTLENDARI, out);
10290 syntax = prevsyntax;
10291 if (syntax == DQSYNTAX)
10299 * unbalanced parens
10300 * (don't 2nd guess - no error)
10308 case CBQUOTE: /* '`' */
10312 goto endword; /* exit outer loop */
10317 goto endword; /* exit outer loop */
10318 #ifdef CONFIG_ASH_ALIAS
10328 #ifdef CONFIG_ASH_MATH_SUPPORT
10329 if (syntax == ARISYNTAX)
10330 synerror("Missing '))'");
10332 if (syntax != BASESYNTAX && ! parsebackquote && eofmark == NULL)
10333 synerror("Unterminated quoted string");
10334 if (varnest != 0) {
10335 startlinno = plinno;
10337 synerror("Missing '}'");
10339 USTPUTC('\0', out);
10340 len = out - (char *)stackblock();
10341 out = stackblock();
10342 if (eofmark == NULL) {
10343 if ((c == '>' || c == '<')
10346 && (*out == '\0' || is_digit(*out))) {
10348 return lasttoken = TREDIR;
10353 quoteflag = quotef;
10354 backquotelist = bqlist;
10355 grabstackblock(len);
10357 return lasttoken = TWORD;
10358 /* end of readtoken routine */
10363 * Check to see whether we are at the end of the here document. When this
10364 * is called, c is set to the first character of the next input line. If
10365 * we are at the end of the here document, this routine sets the c to PEOF.
10370 #ifdef CONFIG_ASH_ALIAS
10376 while (c == '\t') {
10380 if (c == *eofmark) {
10381 if (pfgets(line, sizeof line) != NULL) {
10385 for (q = eofmark + 1 ; *q && *p == *q ; p++, q++);
10386 if (*p == '\n' && *q == '\0') {
10389 needprompt = doprompt;
10391 pushstring(line, NULL);
10396 goto checkend_return;
10401 * Parse a redirection operator. The variable "out" points to a string
10402 * specifying the fd to be redirected. The variable "c" contains the
10403 * first character of the redirection operator.
10410 np = (union node *)stalloc(sizeof (struct nfile));
10415 np->type = NAPPEND;
10417 np->type = NCLOBBER;
10424 } else { /* c == '<' */
10426 switch (c = pgetc()) {
10428 if (sizeof (struct nfile) != sizeof (struct nhere)) {
10429 np = (union node *)stalloc(sizeof (struct nhere));
10433 heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc));
10434 heredoc->here = np;
10435 if ((c = pgetc()) == '-') {
10436 heredoc->striptabs = 1;
10438 heredoc->striptabs = 0;
10444 np->type = NFROMFD;
10448 np->type = NFROMTO;
10458 np->nfile.fd = digit_val(fd);
10460 goto parseredir_return;
10465 * Parse a substitution. At this point, we have read the dollar sign
10466 * and nothing else.
10474 static const char types[] = "}-+?=";
10478 c <= PEOA_OR_PEOF ||
10479 (c != '(' && c != '{' && !is_name(c) && !is_special(c))
10483 } else if (c == '(') { /* $(command) or $((arith)) */
10484 if (pgetc() == '(') {
10485 #ifdef CONFIG_ASH_MATH_SUPPORT
10488 synerror("We unsupport $((arith))");
10495 USTPUTC(CTLVAR, out);
10496 typeloc = out - (char *)stackblock();
10497 USTPUTC(VSNORMAL, out);
10498 subtype = VSNORMAL;
10502 if ((c = pgetc()) == '}')
10505 subtype = VSLENGTH;
10510 if (c > PEOA_OR_PEOF && is_name(c)) {
10514 } while (c > PEOA_OR_PEOF && is_in_name(c));
10515 } else if (is_digit(c)) {
10519 } while (is_digit(c));
10521 else if (is_special(c)) {
10526 badsub: synerror("Bad substitution");
10530 if (subtype == 0) {
10537 p = strchr(types, c);
10540 subtype = p - types + VSNORMAL;
10546 subtype = c == '#' ? VSTRIMLEFT :
10559 if (dblquote || arinest)
10561 *((char *)stackblock() + typeloc) = subtype | flags;
10562 if (subtype != VSNORMAL) {
10564 if (dblquote || arinest) {
10569 goto parsesub_return;
10574 * Called to parse command substitutions. Newstyle is set if the command
10575 * is enclosed inside $(...); nlpp is a pointer to the head of the linked
10576 * list of commands (passed by reference), and savelen is the number of
10577 * characters on the top of the stack which must be preserved.
10581 struct nodelist **nlpp;
10584 char *volatile str;
10585 struct jmploc jmploc;
10586 struct jmploc *volatile savehandler;
10590 (void) &saveprompt;
10593 savepbq = parsebackquote;
10594 if (setjmp(jmploc.loc)) {
10597 parsebackquote = 0;
10598 handler = savehandler;
10599 longjmp(handler->loc, 1);
10603 savelen = out - (char *)stackblock();
10605 str = ckmalloc(savelen);
10606 memcpy(str, stackblock(), savelen);
10608 savehandler = handler;
10612 /* We must read until the closing backquote, giving special
10613 treatment to some slashes, and then push the string and
10614 reread it as input, interpreting it normally. */
10621 STARTSTACKSTR(pout);
10627 switch (pc = pgetc()) {
10632 if ((pc = pgetc()) == '\n') {
10637 * If eating a newline, avoid putting
10638 * the newline into the new character
10639 * stream (via the STPUTC after the
10644 if (pc != '\\' && pc != '`' && pc != '$'
10645 && (!dblquote || pc != '"'))
10646 STPUTC('\\', pout);
10647 if (pc > PEOA_OR_PEOF) {
10653 #ifdef CONFIG_ASH_ALIAS
10656 startlinno = plinno;
10657 synerror("EOF in backquote substitution");
10661 needprompt = doprompt;
10670 STPUTC('\0', pout);
10671 psavelen = pout - (char *)stackblock();
10672 if (psavelen > 0) {
10673 pstr = grabstackstr(pout);
10674 setinputstring(pstr);
10679 nlpp = &(*nlpp)->next;
10680 *nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist));
10681 (*nlpp)->next = NULL;
10682 parsebackquote = oldstyle;
10685 saveprompt = doprompt;
10692 doprompt = saveprompt;
10694 if (readtoken() != TRP)
10701 * Start reading from old file again, ignoring any pushed back
10702 * tokens left from the backquote parsing
10707 while (stackblocksize() <= savelen)
10709 STARTSTACKSTR(out);
10711 memcpy(out, str, savelen);
10712 STADJUST(savelen, out);
10718 parsebackquote = savepbq;
10719 handler = savehandler;
10720 if (arinest || dblquote)
10721 USTPUTC(CTLBACKQ | CTLQUOTE, out);
10723 USTPUTC(CTLBACKQ, out);
10725 goto parsebackq_oldreturn;
10727 goto parsebackq_newreturn;
10730 #ifdef CONFIG_ASH_MATH_SUPPORT
10732 * Parse an arithmetic expansion (indicate start of one and set state)
10736 if (++arinest == 1) {
10737 prevsyntax = syntax;
10738 syntax = ARISYNTAX;
10739 USTPUTC(CTLARI, out);
10746 * we collapse embedded arithmetic expansion to
10747 * parenthesis, which should be equivalent
10751 goto parsearith_return;
10755 } /* end of readtoken */
10760 * Returns true if the text contains nothing to expand (no dollar signs
10765 noexpand(char *text)
10771 while ((c = *p++) != '\0') {
10772 if (c == CTLQUOTEMARK)
10776 else if (SIT(c, BASESYNTAX) == CCTL)
10784 * Return of a legal variable name (a letter or underscore followed by zero or
10785 * more letters, underscores, and digits).
10789 endofname(const char *name)
10797 if (! is_in_name(*p))
10805 * Called when an unexpected token is read during the parse. The argument
10806 * is the token that is expected, or -1 if more than one type of token can
10807 * occur at this point.
10810 static void synexpect(int token)
10815 l = sprintf(msg, "%s unexpected", tokname(lasttoken));
10817 sprintf(msg + l, " (expecting %s)", tokname(token));
10823 synerror(const char *msg)
10825 error("Syntax error: %s", msg);
10831 * called by editline -- any expansions to the prompt
10832 * should be added here.
10835 static void setprompt(int whichprompt)
10837 const char *prompt;
10839 switch (whichprompt) {
10853 static const char *const *findkwd(const char *s)
10855 return bsearch(s, tokname_array + KWDOFFSET,
10856 (sizeof(tokname_array) / sizeof(const char *)) - KWDOFFSET,
10857 sizeof(const char *), pstrcmp);
10860 /* $NetBSD: redir.c,v 1.27 2002/11/24 22:35:42 christos Exp $ */
10863 * Code for dealing with input/output redirection.
10866 #define EMPTY -2 /* marks an unused slot in redirtab */
10868 # define PIPESIZE 4096 /* amount of buffering in a pipe */
10870 # define PIPESIZE PIPE_BUF
10874 * Open a file in noclobber mode.
10875 * The code was copied from bash.
10878 noclobberopen(const char *fname)
10881 struct stat finfo, finfo2;
10884 * If the file exists and is a regular file, return an error
10887 r = stat(fname, &finfo);
10888 if (r == 0 && S_ISREG(finfo.st_mode)) {
10894 * If the file was not present (r != 0), make sure we open it
10895 * exclusively so that if it is created before we open it, our open
10896 * will fail. Make sure that we do not truncate an existing file.
10897 * Note that we don't turn on O_EXCL unless the stat failed -- if the
10898 * file was not a regular file, we leave O_EXCL off.
10901 return open(fname, O_WRONLY|O_CREAT|O_EXCL, 0666);
10902 fd = open(fname, O_WRONLY|O_CREAT, 0666);
10904 /* If the open failed, return the file descriptor right away. */
10909 * OK, the open succeeded, but the file may have been changed from a
10910 * non-regular file to a regular file between the stat and the open.
10911 * We are assuming that the O_EXCL open handles the case where FILENAME
10912 * did not exist and is symlinked to an existing file between the stat
10917 * If we can open it and fstat the file descriptor, and neither check
10918 * revealed that it was a regular file, and the file has not been
10919 * replaced, return the file descriptor.
10921 if (fstat(fd, &finfo2) == 0 && !S_ISREG(finfo2.st_mode) &&
10922 finfo.st_dev == finfo2.st_dev && finfo.st_ino == finfo2.st_ino)
10925 /* The file has been replaced. badness. */
10932 * Handle here documents. Normally we fork off a process to write the
10933 * data to a pipe. If the document is short, we can stuff the data in
10934 * the pipe without forking.
10938 openhere(union node *redir)
10944 error("Pipe call failed");
10945 if (redir->type == NHERE) {
10946 len = strlen(redir->nhere.doc->narg.text);
10947 if (len <= PIPESIZE) {
10948 xwrite(pip[1], redir->nhere.doc->narg.text, len);
10952 if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
10954 signal(SIGINT, SIG_IGN);
10955 signal(SIGQUIT, SIG_IGN);
10956 signal(SIGHUP, SIG_IGN);
10958 signal(SIGTSTP, SIG_IGN);
10960 signal(SIGPIPE, SIG_DFL);
10961 if (redir->type == NHERE)
10962 xwrite(pip[1], redir->nhere.doc->narg.text, len);
10964 expandhere(redir->nhere.doc, pip[1]);
10973 openredirect(union node *redir)
10978 switch (redir->nfile.type) {
10980 fname = redir->nfile.expfname;
10981 if ((f = open(fname, O_RDONLY)) < 0)
10985 fname = redir->nfile.expfname;
10986 if ((f = open(fname, O_RDWR|O_CREAT|O_TRUNC, 0666)) < 0)
10990 /* Take care of noclobber mode. */
10992 fname = redir->nfile.expfname;
10993 if ((f = noclobberopen(fname)) < 0)
10999 fname = redir->nfile.expfname;
11000 if ((f = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
11004 fname = redir->nfile.expfname;
11005 if ((f = open(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0)
11012 /* Fall through to eliminate warning. */
11019 f = openhere(redir);
11025 error("cannot create %s: %s", fname, errmsg(errno, E_CREAT));
11027 error("cannot open %s: %s", fname, errmsg(errno, E_OPEN));
11031 dupredirect(union node *redir, int f)
11033 int fd = redir->nfile.fd;
11035 if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) {
11036 if (redir->ndup.dupfd >= 0) { /* if not ">&-" */
11037 copyfd(redir->ndup.dupfd, fd);
11050 * Process a list of redirection commands. If the REDIR_PUSH flag is set,
11051 * old file descriptors are stashed away so that the redirection can be
11052 * undone by calling popredir. If the REDIR_BACKQ flag is set, then the
11053 * standard output, and the standard error if it becomes a duplicate of
11054 * stdout, is saved in memory.
11058 redirect(union node *redir, int flags)
11061 struct redirtab *sv;
11072 if (flags & REDIR_PUSH) {
11073 struct redirtab *q;
11074 q = ckmalloc(sizeof (struct redirtab));
11075 q->next = redirlist;
11077 q->nullredirs = nullredirs - 1;
11078 for (i = 0 ; i < 10 ; i++)
11079 q->renamed[i] = EMPTY;
11086 if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) &&
11087 n->ndup.dupfd == fd)
11088 continue; /* redirect from/to same file descriptor */
11090 newfd = openredirect(n);
11093 if (sv && *(p = &sv->renamed[fd]) == EMPTY) {
11094 i = fcntl(fd, F_DUPFD, 10);
11101 error("%d: %m", fd);
11111 dupredirect(n, newfd);
11112 } while ((n = n->nfile.next));
11114 if (flags & REDIR_SAVEFD2 && sv && sv->renamed[2] >= 0)
11115 preverrout_fd = sv->renamed[2];
11120 * Undo the effects of the last redirection.
11126 struct redirtab *rp;
11129 if (--nullredirs >= 0)
11133 for (i = 0 ; i < 10 ; i++) {
11134 if (rp->renamed[i] != EMPTY) {
11137 copyfd(rp->renamed[i], i);
11139 close(rp->renamed[i]);
11142 redirlist = rp->next;
11143 nullredirs = rp->nullredirs;
11149 * Undo all redirections. Called on error or interrupt.
11153 * Discard all saved file descriptors.
11157 clearredir(int drop)
11169 * Copy a file descriptor to be >= to. Returns -1
11170 * if the source file descriptor is closed, EMPTY if there are no unused
11171 * file descriptors left.
11175 copyfd(int from, int to)
11179 newfd = fcntl(from, F_DUPFD, to);
11181 if (errno == EMFILE)
11184 error("%d: %m", from);
11191 redirectsafe(union node *redir, int flags)
11194 volatile int saveint;
11195 struct jmploc *volatile savehandler = handler;
11196 struct jmploc jmploc;
11199 if (!(err = setjmp(jmploc.loc) * 2)) {
11201 redirect(redir, flags);
11203 handler = savehandler;
11204 if (err && exception != EXERROR)
11205 longjmp(handler->loc, 1);
11206 RESTOREINT(saveint);
11210 /* $NetBSD: show.c,v 1.24 2003/01/22 20:36:04 dsl Exp $ */
11213 static void shtree(union node *, int, char *, FILE*);
11214 static void shcmd(union node *, FILE *);
11215 static void sharg(union node *, FILE *);
11216 static void indent(int, char *, FILE *);
11217 static void trstring(char *);
11221 showtree(union node *n)
11223 trputs("showtree called\n");
11224 shtree(n, 1, NULL, stdout);
11229 shtree(union node *n, int ind, char *pfx, FILE *fp)
11231 struct nodelist *lp;
11237 indent(ind, pfx, fp);
11248 shtree(n->nbinary.ch1, ind, NULL, fp);
11251 shtree(n->nbinary.ch2, ind, NULL, fp);
11259 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
11264 if (n->npipe.backgnd)
11270 fprintf(fp, "<node type %d>", n->type);
11279 shcmd(union node *cmd, FILE *fp)
11287 for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
11293 for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
11296 switch (np->nfile.type) {
11297 case NTO: s = ">"; dftfd = 1; break;
11298 case NCLOBBER: s = ">|"; dftfd = 1; break;
11299 case NAPPEND: s = ">>"; dftfd = 1; break;
11300 case NTOFD: s = ">&"; dftfd = 1; break;
11301 case NFROM: s = "<"; dftfd = 0; break;
11302 case NFROMFD: s = "<&"; dftfd = 0; break;
11303 case NFROMTO: s = "<>"; dftfd = 0; break;
11304 default: s = "*error*"; dftfd = 0; break;
11306 if (np->nfile.fd != dftfd)
11307 fprintf(fp, "%d", np->nfile.fd);
11309 if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
11310 fprintf(fp, "%d", np->ndup.dupfd);
11312 sharg(np->nfile.fname, fp);
11321 sharg(union node *arg, FILE *fp)
11324 struct nodelist *bqlist;
11327 if (arg->type != NARG) {
11328 out1fmt("<node type %d>\n", arg->type);
11331 bqlist = arg->narg.backquote;
11332 for (p = arg->narg.text ; *p ; p++) {
11341 if (subtype == VSLENGTH)
11347 if (subtype & VSNUL)
11350 switch (subtype & VSTYPE) {
11369 case VSTRIMLEFTMAX:
11376 case VSTRIMRIGHTMAX:
11383 out1fmt("<subtype %d>", subtype);
11390 case CTLBACKQ|CTLQUOTE:
11393 shtree(bqlist->n, -1, NULL, fp);
11405 indent(int amount, char *pfx, FILE *fp)
11409 for (i = 0 ; i < amount ; i++) {
11410 if (pfx && i == amount - 1)
11431 putc(c, tracefile);
11435 trace(const char *fmt, ...)
11442 (void) vfprintf(tracefile, fmt, va);
11447 tracev(const char *fmt, va_list va)
11451 (void) vfprintf(tracefile, fmt, va);
11456 trputs(const char *s)
11460 fputs(s, tracefile);
11472 putc('"', tracefile);
11473 for (p = s ; *p ; p++) {
11475 case '\n': c = 'n'; goto backslash;
11476 case '\t': c = 't'; goto backslash;
11477 case '\r': c = 'r'; goto backslash;
11478 case '"': c = '"'; goto backslash;
11479 case '\\': c = '\\'; goto backslash;
11480 case CTLESC: c = 'e'; goto backslash;
11481 case CTLVAR: c = 'v'; goto backslash;
11482 case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
11483 case CTLBACKQ: c = 'q'; goto backslash;
11484 case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
11485 backslash: putc('\\', tracefile);
11486 putc(c, tracefile);
11489 if (*p >= ' ' && *p <= '~')
11490 putc(*p, tracefile);
11492 putc('\\', tracefile);
11493 putc(*p >> 6 & 03, tracefile);
11494 putc(*p >> 3 & 07, tracefile);
11495 putc(*p & 07, tracefile);
11500 putc('"', tracefile);
11512 putc(' ', tracefile);
11514 putc('\n', tracefile);
11530 /* leave open because libedit might be using it */
11533 scopy("./trace", s);
11535 if (!freopen(s, "a", tracefile)) {
11536 fprintf(stderr, "Can't re-open %s\n", s);
11541 if ((tracefile = fopen(s, "a")) == NULL) {
11542 fprintf(stderr, "Can't open %s\n", s);
11548 if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
11549 fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
11551 setlinebuf(tracefile);
11552 fputs("\nTracing started.\n", tracefile);
11557 /* $NetBSD: trap.c,v 1.28 2002/11/24 22:35:43 christos Exp $ */
11560 * Sigmode records the current value of the signal handlers for the various
11561 * modes. A value of zero means that the current handler is not known.
11562 * S_HARD_IGN indicates that the signal was ignored on entry to the shell,
11565 #define S_DFL 1 /* default signal handling (SIG_DFL) */
11566 #define S_CATCH 2 /* signal is caught */
11567 #define S_IGN 3 /* signal is ignored (SIG_IGN) */
11568 #define S_HARD_IGN 4 /* signal is ignored permenantly */
11569 #define S_RESET 5 /* temporary - to reset a hard ignored sig */
11574 * The trap builtin.
11578 trapcmd(int argc, char **argv)
11587 for (signo = 0 ; signo < NSIG ; signo++) {
11588 if (trap[signo] != NULL) {
11591 sn = u_signal_names(0, &signo, 0);
11594 out1fmt("trap -- %s %s\n",
11595 single_quote(trap[signo]), sn);
11605 if ((signo = decode_signal(*ap, 0)) < 0)
11606 error("%s: bad trap", *ap);
11609 if (action[0] == '-' && action[1] == '\0')
11612 action = savestr(action);
11615 ckfree(trap[signo]);
11616 trap[signo] = action;
11627 * Clear traps on a fork.
11635 for (tp = trap ; tp < &trap[NSIG] ; tp++) {
11636 if (*tp && **tp) { /* trap not NULL or SIG_IGN */
11640 if (tp != &trap[0])
11641 setsignal(tp - trap);
11649 * Set the signal handler for the specified signal. The routine figures
11650 * out what it should be set to.
11654 setsignal(int signo)
11658 struct sigaction act;
11660 if ((t = trap[signo]) == NULL)
11662 else if (*t != '\0')
11666 if (rootshell && action == S_DFL) {
11669 if (iflag || minusc || sflag == 0)
11692 t = &sigmode[signo - 1];
11696 * current setting unknown
11698 if (sigaction(signo, 0, &act) == -1) {
11700 * Pretend it worked; maybe we should give a warning
11701 * here, but other shells don't. We don't alter
11702 * sigmode, so that we retry every time.
11706 if (act.sa_handler == SIG_IGN) {
11707 if (mflag && (signo == SIGTSTP ||
11708 signo == SIGTTIN || signo == SIGTTOU)) {
11709 tsig = S_IGN; /* don't hard ignore these */
11713 tsig = S_RESET; /* force to be set */
11716 if (tsig == S_HARD_IGN || tsig == action)
11720 act.sa_handler = onsig;
11723 act.sa_handler = SIG_IGN;
11726 act.sa_handler = SIG_DFL;
11730 sigfillset(&act.sa_mask);
11731 sigaction(signo, &act, 0);
11739 ignoresig(int signo)
11741 if (sigmode[signo - 1] != S_IGN && sigmode[signo - 1] != S_HARD_IGN) {
11742 signal(signo, SIG_IGN);
11744 sigmode[signo - 1] = S_HARD_IGN;
11755 gotsig[signo - 1] = 1;
11756 pendingsigs = signo;
11758 if (exsig || (signo == SIGINT && !trap[SIGINT])) {
11767 * Called to execute a trap. Perhaps we should avoid entering new trap
11768 * handlers while we are executing a trap handler.
11778 savestatus = exitstatus;
11780 while (pendingsigs = 0, barrier(), (p = memchr(q, 1, NSIG - 1))) {
11782 p = trap[p - q + 1];
11786 exitstatus = savestatus;
11792 * Controls whether the shell is interactive or not.
11796 setinteractive(int on)
11798 static int is_interactive;
11800 if (++on == is_interactive)
11802 is_interactive = on;
11804 setsignal(SIGQUIT);
11805 setsignal(SIGTERM);
11806 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
11807 if(is_interactive > 1) {
11808 /* Looks like they want an interactive shell */
11809 static int do_banner;
11813 "\n\n" BB_BANNER " Built-in shell (ash)\n"
11814 "Enter 'help' for a list of built-in commands.\n\n");
11822 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
11823 /*** List the available builtins ***/
11825 static int helpcmd(int argc, char **argv)
11829 out1fmt("\nBuilt-in commands:\n-------------------\n");
11830 for (col = 0, i = 0; i < NUMBUILTINS; i++) {
11831 col += out1fmt("%c%s", ((col == 0) ? '\t' : ' '),
11832 builtincmd[i].name + 1);
11838 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
11840 extern const struct BB_applet applets[];
11841 extern const size_t NUM_APPLETS;
11843 for (i = 0; i < NUM_APPLETS; i++) {
11845 col += out1fmt("%c%s", ((col == 0) ? '\t' : ' '), applets[i].name);
11854 return EXIT_SUCCESS;
11856 #endif /* CONFIG_FEATURE_SH_EXTRA_QUIET */
11859 * Called to exit the shell.
11869 status = exitstatus;
11870 TRACE(("pid %d, exitshell(%d)\n", getpid(), status));
11871 if (setjmp(loc.loc)) {
11875 if ((p = trap[0]) != NULL && *p != '\0') {
11880 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
11881 if (iflag && rootshell) {
11882 const char *hp = lookupvar("HISTFILE");
11885 save_history ( hp );
11893 static int decode_signal(const char *string, int minsig)
11896 const char *name = u_signal_names(string, &signo, minsig);
11898 return name ? signo : -1;
11901 /* $NetBSD: var.c,v 1.32 2003/01/22 20:36:04 dsl Exp $ */
11903 static struct var *vartab[VTABSIZE];
11905 static int vpcmp(const void *, const void *);
11906 static struct var **findvar(struct var **, const char *);
11909 * Initialize the varable symbol tables and import the environment
11913 #ifdef CONFIG_ASH_GETOPTS
11915 * Safe version of setvar, returns 1 on success 0 on failure.
11919 setvarsafe(const char *name, const char *val, int flags)
11922 volatile int saveint;
11923 struct jmploc *volatile savehandler = handler;
11924 struct jmploc jmploc;
11927 if (setjmp(jmploc.loc))
11931 setvar(name, val, flags);
11934 handler = savehandler;
11935 RESTOREINT(saveint);
11941 * Set the value of a variable. The flags argument is ored with the
11942 * flags of the variable. If val is NULL, the variable is unset.
11946 setvar(const char *name, const char *val, int flags)
11953 q = endofname(name);
11954 p = strchrnul(q, '=');
11955 namelen = p - name;
11956 if (!namelen || p != q)
11957 error("%.*s: bad variable name", namelen, name);
11962 vallen = strlen(val);
11965 p = mempcpy(nameeq = ckmalloc(namelen + vallen + 2), name, namelen);
11969 p = mempcpy(p, val, vallen);
11972 setvareq(nameeq, flags | VNOSAVE);
11978 * Same as setvar except that the variable and value are passed in
11979 * the first argument as name=value. Since the first argument will
11980 * be actually stored in the table, it should not be a string that
11982 * Called with interrupts off.
11986 setvareq(char *s, int flags)
11988 struct var *vp, **vpp;
11991 flags |= (VEXPORT & (((unsigned) (1 - aflag)) - 1));
11992 vp = *findvar(vpp, s);
11994 if (vp->flags & VREADONLY) {
11995 if (flags & VNOSAVE)
11997 error("%.*s: is read only", strchrnul(s, '=') - s, s);
12000 if (flags & VNOSET)
12003 if (vp->func && (flags & VNOFUNC) == 0)
12004 (*vp->func)(strchrnul(s, '=') + 1);
12006 if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
12009 flags |= vp->flags & ~(VTEXTFIXED|VSTACK|VNOSAVE|VUNSET);
12011 if (flags & VNOSET)
12014 vp = ckmalloc(sizeof (*vp));
12019 if (!(flags & (VTEXTFIXED|VSTACK|VNOSAVE)))
12027 * Process a linked list of variable assignments.
12031 listsetvar(struct strlist *list_set_var, int flags)
12033 struct strlist *lp = list_set_var;
12039 setvareq(lp->text, flags);
12040 } while ((lp = lp->next));
12046 * Find the value of a variable. Returns NULL if not set.
12050 lookupvar(const char *name)
12054 if ((v = *findvar(hashvar(name), name)) && !(v->flags & VUNSET)) {
12055 return strchrnul(v->text, '=') + 1;
12062 * Search the environment of a builtin command.
12066 bltinlookup(const char *name)
12068 struct strlist *sp;
12070 for (sp = cmdenviron ; sp ; sp = sp->next) {
12071 if (varequal(sp->text, name))
12072 return strchrnul(sp->text, '=') + 1;
12074 return lookupvar(name);
12079 * Generate a list of variables satisfying the given conditions.
12083 listvars(int on, int off, char ***end)
12094 for (vp = *vpp ; vp ; vp = vp->next)
12095 if ((vp->flags & mask) == on) {
12096 if (ep == stackstrend())
12097 ep = growstackstr();
12098 *ep++ = (char *) vp->text;
12100 } while (++vpp < vartab + VTABSIZE);
12101 if (ep == stackstrend())
12102 ep = growstackstr();
12106 return grabstackstr(ep);
12111 * POSIX requires that 'set' (but not export or readonly) output the
12112 * variables in lexicographic order - by the locale's collating order (sigh).
12113 * Maybe we could keep them in an ordered balanced binary tree
12114 * instead of hashed lists.
12115 * For now just roll 'em through qsort for printing...
12119 showvars(const char *sep_prefix, int on, int off)
12122 char **ep, **epend;
12124 ep = listvars(on, off, &epend);
12125 qsort(ep, epend - ep, sizeof(char *), vpcmp);
12127 sep = *sep_prefix ? spcstr : sep_prefix;
12129 for (; ep < epend; ep++) {
12133 p = strchrnul(*ep, '=');
12136 q = single_quote(++p);
12138 out1fmt("%s%s%.*s%s\n", sep_prefix, sep, (int)(p - *ep), *ep, q);
12147 * The export and readonly commands.
12151 exportcmd(int argc, char **argv)
12157 int flag = argv[0][0] == 'r'? VREADONLY : VEXPORT;
12160 notp = nextopt("p") - 'p';
12161 if (notp && ((name = *(aptr = argptr)))) {
12163 if ((p = strchr(name, '=')) != NULL) {
12166 if ((vp = *findvar(hashvar(name), name))) {
12171 setvar(name, p, flag);
12172 } while ((name = *++aptr) != NULL);
12174 showvars(argv[0], flag, 0);
12181 * Make a variable a local variable. When a variable is made local, it's
12182 * value and flags are saved in a localvar structure. The saved values
12183 * will be restored when the shell function returns. We handle the name
12184 * "-" as a special case.
12188 mklocal(char *name)
12190 struct localvar *lvp;
12195 lvp = ckmalloc(sizeof (struct localvar));
12196 if (name[0] == '-' && name[1] == '\0') {
12198 p = ckmalloc(sizeof(optlist));
12199 lvp->text = memcpy(p, optlist, sizeof(optlist));
12204 vpp = hashvar(name);
12205 vp = *findvar(vpp, name);
12206 eq = strchr(name, '=');
12209 setvareq(name, VSTRFIXED);
12211 setvar(name, NULL, VSTRFIXED);
12212 vp = *vpp; /* the new variable */
12213 lvp->flags = VUNSET;
12215 lvp->text = vp->text;
12216 lvp->flags = vp->flags;
12217 vp->flags |= VSTRFIXED|VTEXTFIXED;
12223 lvp->next = localvars;
12229 * The "local" command.
12233 localcmd(int argc, char **argv)
12238 while ((name = *argv++) != NULL) {
12246 * Called after a function returns.
12247 * Interrupts must be off.
12253 struct localvar *lvp;
12256 while ((lvp = localvars) != NULL) {
12257 localvars = lvp->next;
12259 TRACE(("poplocalvar %s", vp ? vp->text : "-"));
12260 if (vp == NULL) { /* $- saved */
12261 memcpy(optlist, lvp->text, sizeof(optlist));
12264 } else if ((lvp->flags & (VUNSET|VSTRFIXED)) == VUNSET) {
12265 unsetvar(vp->text);
12268 (*vp->func)(strchrnul(lvp->text, '=') + 1);
12269 if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
12271 vp->flags = lvp->flags;
12272 vp->text = lvp->text;
12280 * The unset builtin command. We unset the function before we unset the
12281 * variable to allow a function to be unset when there is a readonly variable
12282 * with the same name.
12286 unsetcmd(int argc, char **argv)
12293 while ((i = nextopt("vf")) != '\0') {
12297 for (ap = argptr; *ap ; ap++) {
12312 * Unset the specified variable.
12316 unsetvar(const char *s)
12322 vpp = findvar(hashvar(s), s);
12326 int flags = vp->flags;
12329 if (flags & VREADONLY)
12331 if (flags & VUNSET)
12333 if ((flags & VSTRFIXED) == 0) {
12335 if ((flags & (VTEXTFIXED|VSTACK)) == 0)
12342 vp->flags &= ~VEXPORT;
12355 * Find the appropriate entry in the hash table from the name.
12358 static struct var **
12359 hashvar(const char *p)
12361 unsigned int hashval;
12363 hashval = ((unsigned char) *p) << 4;
12364 while (*p && *p != '=')
12365 hashval += (unsigned char) *p++;
12366 return &vartab[hashval % VTABSIZE];
12372 * Compares two strings up to the first = or '\0'. The first
12373 * string must be terminated by '='; the second may be terminated by
12374 * either '=' or '\0'.
12378 varcmp(const char *p, const char *q)
12382 while ((c = *p) == (d = *q)) {
12383 if (!c || c == '=')
12397 vpcmp(const void *a, const void *b)
12399 return varcmp(*(const char **)a, *(const char **)b);
12402 static struct var **
12403 findvar(struct var **vpp, const char *name)
12405 for (; *vpp; vpp = &(*vpp)->next) {
12406 if (varequal((*vpp)->text, name)) {
12412 /* $NetBSD: setmode.c,v 1.29 2003/01/15 23:58:03 kleink Exp $ */
12414 #include <sys/times.h>
12416 static const unsigned char timescmd_str[] = {
12417 ' ', offsetof(struct tms, tms_utime),
12418 '\n', offsetof(struct tms, tms_stime),
12419 ' ', offsetof(struct tms, tms_cutime),
12420 '\n', offsetof(struct tms, tms_cstime),
12424 static int timescmd(int ac, char **av)
12426 long int clk_tck, s, t;
12427 const unsigned char *p;
12430 clk_tck = sysconf(_SC_CLK_TCK);
12435 t = *(clock_t *)(((char *) &buf) + p[1]);
12437 out1fmt("%ldm%ld.%.3lds%c",
12439 ((t - s * clk_tck) * 1000) / clk_tck,
12441 } while (*(p += 2));
12446 #ifdef CONFIG_ASH_MATH_SUPPORT
12448 dash_arith(const char *s)
12454 result = arith(s, &errcode);
12457 error("exponent less than 0");
12458 else if (errcode == -2)
12459 error("divide by zero");
12460 else if (errcode == -5)
12461 error("expression recursion loop detected");
12472 * The let builtin. partial stolen from GNU Bash, the Bourne Again SHell.
12473 * Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
12475 * Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
12479 letcmd(int argc, char **argv)
12486 error("expression expected");
12487 for (ap = argv + 1; *ap; ap++) {
12488 i = dash_arith(*ap);
12493 #endif /* CONFIG_ASH_MATH_SUPPORT */
12495 /* $NetBSD: miscbltin.c,v 1.31 2002/11/24 22:35:41 christos Exp $ */
12498 * Miscelaneous builtins.
12504 #if !defined(__GLIBC__) || __GLIBC__ == 2 && __GLIBC_MINOR__ < 1
12505 typedef enum __rlimit_resource rlim_t;
12511 * The read builtin. The -e option causes backslashes to escape the
12512 * following character.
12514 * This uses unbuffered input, which may be avoidable in some cases.
12518 readcmd(int argc, char **argv)
12533 while ((i = nextopt("p:r")) != '\0') {
12535 prompt = optionarg;
12539 if (prompt && isatty(0)) {
12542 if (*(ap = argptr) == NULL)
12543 error("arg count");
12544 if ((ifs = bltinlookup("IFS")) == NULL)
12551 if (read(0, &c, 1) != 1) {
12563 if (!rflag && c == '\\') {
12569 if (startword && *ifs == ' ' && strchr(ifs, c)) {
12573 if (ap[1] != NULL && strchr(ifs, c) != NULL) {
12575 setvar(*ap, stackblock(), 0);
12585 /* Remove trailing blanks */
12586 while ((char *)stackblock() <= --p && strchr(ifs, *p) != NULL)
12588 setvar(*ap, stackblock(), 0);
12589 while (*++ap != NULL)
12590 setvar(*ap, nullstr, 0);
12595 static int umaskcmd(int argc, char **argv)
12597 static const char permuser[3] = "ugo";
12598 static const char permmode[3] = "rwx";
12599 static const short int permmask[] = {
12600 S_IRUSR, S_IWUSR, S_IXUSR,
12601 S_IRGRP, S_IWGRP, S_IXGRP,
12602 S_IROTH, S_IWOTH, S_IXOTH
12608 int symbolic_mode = 0;
12610 while (nextopt("S") != '\0') {
12619 if ((ap = *argptr) == NULL) {
12620 if (symbolic_mode) {
12624 for (i = 0; i < 3; i++) {
12627 *p++ = permuser[i];
12629 for (j = 0; j < 3; j++) {
12630 if ((mask & permmask[3 * i + j]) == 0) {
12631 *p++ = permmode[j];
12639 out1fmt("%.4o\n", mask);
12642 if (is_digit((unsigned char) *ap)) {
12645 if (*ap >= '8' || *ap < '0')
12646 error(illnum, argv[1]);
12647 mask = (mask << 3) + (*ap - '0');
12648 } while (*++ap != '\0');
12651 mask = ~mask & 0777;
12652 if (!bb_parse_mode(ap, &mask)) {
12653 error("Illegal mode: %s", ap);
12655 umask(~mask & 0777);
12664 * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
12665 * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
12666 * ash by J.T. Conklin.
12674 int factor; /* multiply by to get rlim_{cur,max} values */
12678 static const struct limits limits[] = {
12680 { "time(seconds)", RLIMIT_CPU, 1, 't' },
12682 #ifdef RLIMIT_FSIZE
12683 { "file(blocks)", RLIMIT_FSIZE, 512, 'f' },
12686 { "data(kbytes)", RLIMIT_DATA, 1024, 'd' },
12688 #ifdef RLIMIT_STACK
12689 { "stack(kbytes)", RLIMIT_STACK, 1024, 's' },
12692 { "coredump(blocks)", RLIMIT_CORE, 512, 'c' },
12695 { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' },
12697 #ifdef RLIMIT_MEMLOCK
12698 { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' },
12700 #ifdef RLIMIT_NPROC
12701 { "process(processes)", RLIMIT_NPROC, 1, 'p' },
12703 #ifdef RLIMIT_NOFILE
12704 { "nofiles(descriptors)", RLIMIT_NOFILE, 1, 'n' },
12707 { "vmemory(kbytes)", RLIMIT_VMEM, 1024, 'v' },
12710 { "swap(kbytes)", RLIMIT_SWAP, 1024, 'w' },
12712 { (char *) 0, 0, 0, '\0' }
12716 ulimitcmd(int argc, char **argv)
12720 enum { SOFT = 0x1, HARD = 0x2 }
12722 const struct limits *l;
12725 struct rlimit limit;
12728 while ((optc = nextopt("HSatfdsmcnpl")) != '\0')
12743 for (l = limits; l->name && l->option != what; l++)
12746 error("internal error (%c)", what);
12748 set = *argptr ? 1 : 0;
12752 if (all || argptr[1])
12753 error("too many arguments");
12754 if (strncmp(p, "unlimited\n", 9) == 0)
12755 val = RLIM_INFINITY;
12759 while ((c = *p++) >= '0' && c <= '9')
12761 val = (val * 10) + (long)(c - '0');
12762 if (val < (rlim_t) 0)
12766 error("bad number");
12771 for (l = limits; l->name; l++) {
12772 getrlimit(l->cmd, &limit);
12774 val = limit.rlim_cur;
12775 else if (how & HARD)
12776 val = limit.rlim_max;
12778 out1fmt("%-20s ", l->name);
12779 if (val == RLIM_INFINITY)
12780 out1fmt("unlimited\n");
12784 out1fmt("%lld\n", (long long) val);
12790 getrlimit(l->cmd, &limit);
12793 limit.rlim_max = val;
12795 limit.rlim_cur = val;
12796 if (setrlimit(l->cmd, &limit) < 0)
12797 error("error setting limit (%m)");
12800 val = limit.rlim_cur;
12801 else if (how & HARD)
12802 val = limit.rlim_max;
12804 if (val == RLIM_INFINITY)
12805 out1fmt("unlimited\n");
12809 out1fmt("%lld\n", (long long) val);
12816 #ifdef CONFIG_ASH_MATH_SUPPORT
12818 /* Copyright (c) 2001 Aaron Lehmann <aaronl@vitelus.com>
12820 Permission is hereby granted, free of charge, to any person obtaining
12821 a copy of this software and associated documentation files (the
12822 "Software"), to deal in the Software without restriction, including
12823 without limitation the rights to use, copy, modify, merge, publish,
12824 distribute, sublicense, and/or sell copies of the Software, and to
12825 permit persons to whom the Software is furnished to do so, subject to
12826 the following conditions:
12828 The above copyright notice and this permission notice shall be
12829 included in all copies or substantial portions of the Software.
12831 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
12832 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
12833 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
12834 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
12835 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
12836 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
12837 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
12840 /* This is my infix parser/evaluator. It is optimized for size, intended
12841 * as a replacement for yacc-based parsers. However, it may well be faster
12842 * than a comparable parser writen in yacc. The supported operators are
12843 * listed in #defines below. Parens, order of operations, and error handling
12844 * are supported. This code is threadsafe. The exact expression format should
12845 * be that which POSIX specifies for shells. */
12847 /* The code uses a simple two-stack algorithm. See
12848 * http://www.onthenet.com.au/~grahamis/int2008/week02/lect02.html
12849 * for a detailed explaination of the infix-to-postfix algorithm on which
12850 * this is based (this code differs in that it applies operators immediately
12851 * to the stack instead of adding them to a queue to end up with an
12854 /* To use the routine, call it with an expression string and error return
12858 * Aug 24, 2001 Manuel Novoa III
12860 * Reduced the generated code size by about 30% (i386) and fixed several bugs.
12862 * 1) In arith_apply():
12863 * a) Cached values of *numptr and &(numptr[-1]).
12864 * b) Removed redundant test for zero denominator.
12867 * a) Eliminated redundant code for processing operator tokens by moving
12868 * to a table-based implementation. Also folded handling of parens
12870 * b) Combined all 3 loops which called arith_apply to reduce generated
12871 * code size at the cost of speed.
12873 * 3) The following expressions were treated as valid by the original code:
12874 * 1() , 0! , 1 ( *3 ) .
12875 * These bugs have been fixed by internally enclosing the expression in
12876 * parens and then checking that all binary ops and right parens are
12877 * preceded by a valid expression (NUM_TOKEN).
12879 * Note: It may be desireable to replace Aaron's test for whitespace with
12880 * ctype's isspace() if it is used by another busybox applet or if additional
12881 * whitespace chars should be considered. Look below the "#include"s for a
12882 * precompiler test.
12886 * Aug 26, 2001 Manuel Novoa III
12888 * Return 0 for null expressions. Pointed out by Vladimir Oleynik.
12890 * Merge in Aaron's comments previously posted to the busybox list,
12891 * modified slightly to take account of my changes to the code.
12896 * (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
12898 * - allow access to variable,
12899 * used recursive find value indirection (c=2*2; a="c"; $((a+=2)) produce 6)
12900 * - realize assign syntax (VAR=expr, +=, *= etc)
12901 * - realize exponentiation (** operator)
12902 * - realize comma separated - expr, expr
12903 * - realise ++expr --expr expr++ expr--
12904 * - realise expr ? expr : expr (but, second expr calculate always)
12905 * - allow hexdecimal and octal numbers
12906 * - was restored loses XOR operator
12907 * - remove one goto label, added three ;-)
12908 * - protect $((num num)) as true zero expr (Manuel`s error)
12909 * - always use special isspace(), see comment from bash ;-)
12913 #define arith_isspace(arithval) \
12914 (arithval == ' ' || arithval == '\n' || arithval == '\t')
12917 typedef unsigned char operator;
12919 /* An operator's token id is a bit of a bitfield. The lower 5 bits are the
12920 * precedence, and 3 high bits are an ID unique accross operators of that
12921 * precedence. The ID portion is so that multiple operators can have the
12922 * same precedence, ensuring that the leftmost one is evaluated first.
12923 * Consider * and /. */
12925 #define tok_decl(prec,id) (((id)<<5)|(prec))
12926 #define PREC(op) ((op) & 0x1F)
12928 #define TOK_LPAREN tok_decl(0,0)
12930 #define TOK_COMMA tok_decl(1,0)
12932 #define TOK_ASSIGN tok_decl(2,0)
12933 #define TOK_AND_ASSIGN tok_decl(2,1)
12934 #define TOK_OR_ASSIGN tok_decl(2,2)
12935 #define TOK_XOR_ASSIGN tok_decl(2,3)
12936 #define TOK_PLUS_ASSIGN tok_decl(2,4)
12937 #define TOK_MINUS_ASSIGN tok_decl(2,5)
12938 #define TOK_LSHIFT_ASSIGN tok_decl(2,6)
12939 #define TOK_RSHIFT_ASSIGN tok_decl(2,7)
12941 #define TOK_MUL_ASSIGN tok_decl(3,0)
12942 #define TOK_DIV_ASSIGN tok_decl(3,1)
12943 #define TOK_REM_ASSIGN tok_decl(3,2)
12945 /* all assign is right associativity and precedence eq, but (7+3)<<5 > 256 */
12946 #define convert_prec_is_assing(prec) do { if(prec == 3) prec = 2; } while(0)
12948 /* conditional is right associativity too */
12949 #define TOK_CONDITIONAL tok_decl(4,0)
12950 #define TOK_CONDITIONAL_SEP tok_decl(4,1)
12952 #define TOK_OR tok_decl(5,0)
12954 #define TOK_AND tok_decl(6,0)
12956 #define TOK_BOR tok_decl(7,0)
12958 #define TOK_BXOR tok_decl(8,0)
12960 #define TOK_BAND tok_decl(9,0)
12962 #define TOK_EQ tok_decl(10,0)
12963 #define TOK_NE tok_decl(10,1)
12965 #define TOK_LT tok_decl(11,0)
12966 #define TOK_GT tok_decl(11,1)
12967 #define TOK_GE tok_decl(11,2)
12968 #define TOK_LE tok_decl(11,3)
12970 #define TOK_LSHIFT tok_decl(12,0)
12971 #define TOK_RSHIFT tok_decl(12,1)
12973 #define TOK_ADD tok_decl(13,0)
12974 #define TOK_SUB tok_decl(13,1)
12976 #define TOK_MUL tok_decl(14,0)
12977 #define TOK_DIV tok_decl(14,1)
12978 #define TOK_REM tok_decl(14,2)
12980 /* exponent is right associativity */
12981 #define TOK_EXPONENT tok_decl(15,1)
12983 /* For now unary operators. */
12984 #define UNARYPREC 16
12985 #define TOK_BNOT tok_decl(UNARYPREC,0)
12986 #define TOK_NOT tok_decl(UNARYPREC,1)
12988 #define TOK_UMINUS tok_decl(UNARYPREC+1,0)
12989 #define TOK_UPLUS tok_decl(UNARYPREC+1,1)
12991 #define PREC_PRE (UNARYPREC+2)
12993 #define TOK_PRE_INC tok_decl(PREC_PRE, 0)
12994 #define TOK_PRE_DEC tok_decl(PREC_PRE, 1)
12996 #define PREC_POST (UNARYPREC+3)
12998 #define TOK_POST_INC tok_decl(PREC_POST, 0)
12999 #define TOK_POST_DEC tok_decl(PREC_POST, 1)
13001 #define SPEC_PREC (UNARYPREC+4)
13003 #define TOK_NUM tok_decl(SPEC_PREC, 0)
13004 #define TOK_RPAREN tok_decl(SPEC_PREC, 1)
13006 #define NUMPTR (*numstackptr)
13008 static inline int tok_have_assign(operator op)
13010 operator prec = PREC(op);
13012 convert_prec_is_assing(prec);
13013 return (prec == PREC(TOK_ASSIGN) ||
13014 prec == PREC_PRE || prec == PREC_POST);
13017 static inline int is_right_associativity(operator prec)
13019 return (prec == PREC(TOK_ASSIGN) || prec == PREC(TOK_EXPONENT) ||
13020 prec == PREC(TOK_CONDITIONAL));
13024 typedef struct ARITCH_VAR_NUM {
13026 long contidional_second_val;
13027 char contidional_second_val_initialized;
13028 char *var; /* if NULL then is regular number,
13029 else is varable name */
13033 typedef struct CHK_VAR_RECURSIVE_LOOPED {
13035 struct CHK_VAR_RECURSIVE_LOOPED *next;
13036 } chk_var_recursive_looped_t;
13038 static chk_var_recursive_looped_t *prev_chk_var_recursive;
13041 static int arith_lookup_val(v_n_t *t)
13044 const char * p = lookupvar(t->var);
13049 /* recursive try as expression */
13050 chk_var_recursive_looped_t *cur;
13051 chk_var_recursive_looped_t cur_save;
13053 for(cur = prev_chk_var_recursive; cur; cur = cur->next) {
13054 if(strcmp(cur->var, t->var) == 0) {
13055 /* expression recursion loop detected */
13059 /* save current lookuped var name */
13060 cur = prev_chk_var_recursive;
13061 cur_save.var = t->var;
13062 cur_save.next = cur;
13063 prev_chk_var_recursive = &cur_save;
13065 t->val = arith (p, &errcode);
13066 /* restore previous ptr after recursiving */
13067 prev_chk_var_recursive = cur;
13070 /* allow undefined var as 0 */
13077 /* "applying" a token means performing it on the top elements on the integer
13078 * stack. For a unary operator it will only change the top element, but a
13079 * binary operator will pop two arguments and push a result */
13081 arith_apply(operator op, v_n_t *numstack, v_n_t **numstackptr)
13086 int ret_arith_lookup_val;
13088 if (NUMPTR == numstack) goto err; /* There is no operator that can work
13089 without arguments */
13090 numptr_m1 = NUMPTR - 1;
13092 /* check operand is var with noninteger value */
13093 ret_arith_lookup_val = arith_lookup_val(numptr_m1);
13094 if(ret_arith_lookup_val)
13095 return ret_arith_lookup_val;
13097 rez = numptr_m1->val;
13098 if (op == TOK_UMINUS)
13100 else if (op == TOK_NOT)
13102 else if (op == TOK_BNOT)
13104 else if (op == TOK_POST_INC || op == TOK_PRE_INC)
13106 else if (op == TOK_POST_DEC || op == TOK_PRE_DEC)
13108 else if (op != TOK_UPLUS) {
13109 /* Binary operators */
13111 /* check and binary operators need two arguments */
13112 if (numptr_m1 == numstack) goto err;
13114 /* ... and they pop one */
13117 if (op == TOK_CONDITIONAL) {
13118 if(! numptr_m1->contidional_second_val_initialized) {
13119 /* protect $((expr1 ? expr2)) without ": expr" */
13122 rez = numptr_m1->contidional_second_val;
13123 } else if(numptr_m1->contidional_second_val_initialized) {
13124 /* protect $((expr1 : expr2)) without "expr ? " */
13127 numptr_m1 = NUMPTR - 1;
13128 if(op != TOK_ASSIGN) {
13129 /* check operand is var with noninteger value for not '=' */
13130 ret_arith_lookup_val = arith_lookup_val(numptr_m1);
13131 if(ret_arith_lookup_val)
13132 return ret_arith_lookup_val;
13134 if (op == TOK_CONDITIONAL) {
13135 numptr_m1->contidional_second_val = rez;
13137 rez = numptr_m1->val;
13138 if (op == TOK_BOR || op == TOK_OR_ASSIGN)
13140 else if (op == TOK_OR)
13141 rez = numptr_val || rez;
13142 else if (op == TOK_BAND || op == TOK_AND_ASSIGN)
13144 else if (op == TOK_BXOR || op == TOK_XOR_ASSIGN)
13146 else if (op == TOK_AND)
13147 rez = rez && numptr_val;
13148 else if (op == TOK_EQ)
13149 rez = (rez == numptr_val);
13150 else if (op == TOK_NE)
13151 rez = (rez != numptr_val);
13152 else if (op == TOK_GE)
13153 rez = (rez >= numptr_val);
13154 else if (op == TOK_RSHIFT || op == TOK_RSHIFT_ASSIGN)
13155 rez >>= numptr_val;
13156 else if (op == TOK_LSHIFT || op == TOK_LSHIFT_ASSIGN)
13157 rez <<= numptr_val;
13158 else if (op == TOK_GT)
13159 rez = (rez > numptr_val);
13160 else if (op == TOK_LT)
13161 rez = (rez < numptr_val);
13162 else if (op == TOK_LE)
13163 rez = (rez <= numptr_val);
13164 else if (op == TOK_MUL || op == TOK_MUL_ASSIGN)
13166 else if (op == TOK_ADD || op == TOK_PLUS_ASSIGN)
13168 else if (op == TOK_SUB || op == TOK_MINUS_ASSIGN)
13170 else if (op == TOK_ASSIGN || op == TOK_COMMA)
13172 else if (op == TOK_CONDITIONAL_SEP) {
13173 if (numptr_m1 == numstack) {
13174 /* protect $((expr : expr)) without "expr ? " */
13177 numptr_m1->contidional_second_val_initialized = op;
13178 numptr_m1->contidional_second_val = numptr_val;
13180 else if (op == TOK_CONDITIONAL) {
13182 numptr_val : numptr_m1->contidional_second_val;
13184 else if(op == TOK_EXPONENT) {
13186 return -3; /* exponent less than 0 */
13191 while(numptr_val--)
13196 else if(numptr_val==0) /* zero divisor check */
13198 else if (op == TOK_DIV || op == TOK_DIV_ASSIGN)
13200 else if (op == TOK_REM || op == TOK_REM_ASSIGN)
13203 if(tok_have_assign(op)) {
13206 if(numptr_m1->var == NULL) {
13210 /* save to shell variable */
13211 sprintf(buf, "%ld", rez);
13212 setvar(numptr_m1->var, buf, 0);
13213 /* after saving, make previous value for v++ or v-- */
13214 if(op == TOK_POST_INC)
13216 else if(op == TOK_POST_DEC)
13219 numptr_m1->val = rez;
13220 /* protect geting var value, is number now */
13221 numptr_m1->var = NULL;
13226 /* longest must first */
13227 static const char op_tokens[] = {
13228 '<','<','=',0, TOK_LSHIFT_ASSIGN,
13229 '>','>','=',0, TOK_RSHIFT_ASSIGN,
13230 '<','<', 0, TOK_LSHIFT,
13231 '>','>', 0, TOK_RSHIFT,
13232 '|','|', 0, TOK_OR,
13233 '&','&', 0, TOK_AND,
13234 '!','=', 0, TOK_NE,
13235 '<','=', 0, TOK_LE,
13236 '>','=', 0, TOK_GE,
13237 '=','=', 0, TOK_EQ,
13238 '|','=', 0, TOK_OR_ASSIGN,
13239 '&','=', 0, TOK_AND_ASSIGN,
13240 '*','=', 0, TOK_MUL_ASSIGN,
13241 '/','=', 0, TOK_DIV_ASSIGN,
13242 '%','=', 0, TOK_REM_ASSIGN,
13243 '+','=', 0, TOK_PLUS_ASSIGN,
13244 '-','=', 0, TOK_MINUS_ASSIGN,
13245 '-','-', 0, TOK_POST_DEC,
13246 '^','=', 0, TOK_XOR_ASSIGN,
13247 '+','+', 0, TOK_POST_INC,
13248 '*','*', 0, TOK_EXPONENT,
13252 '=', 0, TOK_ASSIGN,
13264 '?', 0, TOK_CONDITIONAL,
13265 ':', 0, TOK_CONDITIONAL_SEP,
13266 ')', 0, TOK_RPAREN,
13267 '(', 0, TOK_LPAREN,
13271 #define endexpression &op_tokens[sizeof(op_tokens)-7]
13274 extern long arith (const char *expr, int *perrcode)
13276 register char arithval; /* Current character under analysis */
13277 operator lasttok, op;
13280 const char *p = endexpression;
13283 size_t datasizes = strlen(expr) + 2;
13285 /* Stack of integers */
13286 /* The proof that there can be no more than strlen(startbuf)/2+1 integers
13287 * in any given correct or incorrect expression is left as an excersize to
13289 v_n_t *numstack = alloca(((datasizes)/2)*sizeof(v_n_t)),
13290 *numstackptr = numstack;
13291 /* Stack of operator tokens */
13292 operator *stack = alloca((datasizes) * sizeof(operator)),
13295 *stackptr++ = lasttok = TOK_LPAREN; /* start off with a left paren */
13296 *perrcode = errcode = 0;
13299 if ((arithval = *expr) == 0) {
13300 if (p == endexpression) {
13301 /* Null expression. */
13305 /* This is only reached after all tokens have been extracted from the
13306 * input stream. If there are still tokens on the operator stack, they
13307 * are to be applied in order. At the end, there should be a final
13308 * result on the integer stack */
13310 if (expr != endexpression + 1) {
13311 /* If we haven't done so already, */
13312 /* append a closing right paren */
13313 expr = endexpression;
13314 /* and let the loop process it. */
13317 /* At this point, we're done with the expression. */
13318 if (numstackptr != numstack+1) {
13319 /* ... but if there isn't, it's bad */
13321 return (*perrcode = -1);
13323 if(numstack->var) {
13324 /* expression is $((var)) only, lookup now */
13325 errcode = arith_lookup_val(numstack);
13328 *perrcode = errcode;
13329 return numstack->val;
13331 /* Continue processing the expression. */
13332 if (arith_isspace(arithval)) {
13333 /* Skip whitespace */
13336 if((p = endofname(expr)) != expr) {
13337 int var_name_size = (p-expr) + 1; /* trailing zero */
13339 numstackptr->var = alloca(var_name_size);
13340 safe_strncpy(numstackptr->var, expr, var_name_size);
13343 numstackptr->contidional_second_val_initialized = 0;
13347 } else if (is_digit(arithval)) {
13348 numstackptr->var = NULL;
13349 numstackptr->val = strtol(expr, (char **) &expr, 0);
13352 for(p = op_tokens; ; p++) {
13356 /* strange operator not found */
13359 for(o = expr; *p && *o == *p; p++)
13366 /* skip tail uncompared token */
13369 /* skip zero delim */
13374 /* post grammar: a++ reduce to num */
13375 if(lasttok == TOK_POST_INC || lasttok == TOK_POST_DEC)
13378 /* Plus and minus are binary (not unary) _only_ if the last
13379 * token was as number, or a right paren (which pretends to be
13380 * a number, since it evaluates to one). Think about it.
13381 * It makes sense. */
13382 if (lasttok != TOK_NUM) {
13398 /* We don't want a unary operator to cause recursive descent on the
13399 * stack, because there can be many in a row and it could cause an
13400 * operator to be evaluated before its argument is pushed onto the
13401 * integer stack. */
13402 /* But for binary operators, "apply" everything on the operator
13403 * stack until we find an operator with a lesser priority than the
13404 * one we have just extracted. */
13405 /* Left paren is given the lowest priority so it will never be
13406 * "applied" in this way.
13407 * if associativity is right and priority eq, applied also skip
13410 if ((prec > 0 && prec < UNARYPREC) || prec == SPEC_PREC) {
13411 /* not left paren or unary */
13412 if (lasttok != TOK_NUM) {
13413 /* binary op must be preceded by a num */
13416 while (stackptr != stack) {
13417 if (op == TOK_RPAREN) {
13418 /* The algorithm employed here is simple: while we don't
13419 * hit an open paren nor the bottom of the stack, pop
13420 * tokens and apply them */
13421 if (stackptr[-1] == TOK_LPAREN) {
13423 /* Any operator directly after a */
13425 /* close paren should consider itself binary */
13429 operator prev_prec = PREC(stackptr[-1]);
13431 convert_prec_is_assing(prec);
13432 convert_prec_is_assing(prev_prec);
13433 if (prev_prec < prec)
13435 /* check right assoc */
13436 if(prev_prec == prec && is_right_associativity(prec))
13439 errcode = arith_apply(*--stackptr, numstack, &numstackptr);
13440 if(errcode) goto ret;
13442 if (op == TOK_RPAREN) {
13447 /* Push this operator to the stack and remember it. */
13448 *stackptr++ = lasttok = op;
13455 #endif /* CONFIG_ASH_MATH_SUPPORT */
13459 const char *bb_applet_name = "debug stuff usage";
13460 int main(int argc, char **argv)
13462 return ash_main(argc, argv);
13467 * Copyright (c) 1989, 1991, 1993, 1994
13468 * The Regents of the University of California. All rights reserved.
13470 * This code is derived from software contributed to Berkeley by
13471 * Kenneth Almquist.
13473 * Redistribution and use in source and binary forms, with or without
13474 * modification, are permitted provided that the following conditions
13476 * 1. Redistributions of source code must retain the above copyright
13477 * notice, this list of conditions and the following disclaimer.
13478 * 2. Redistributions in binary form must reproduce the above copyright
13479 * notice, this list of conditions and the following disclaimer in the
13480 * documentation and/or other materials provided with the distribution.
13482 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
13483 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
13485 * 4. Neither the name of the University nor the names of its contributors
13486 * may be used to endorse or promote products derived from this software
13487 * without specific prior written permission.
13489 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
13490 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
13491 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
13492 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
13493 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
13494 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
13495 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
13496 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
13497 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
13498 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF