1 /* vi: set sw=4 ts=4: */
3 * ash shell port for busybox
5 * Copyright (c) 1989, 1991, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
8 * Copyright (c) 1997-2003 Herbert Xu <herbert@debian.org>
9 * was re-ported from NetBSD and debianized.
12 * This code is derived from software contributed to Berkeley by
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 * General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 * Original BSD copyright notice is retained at the end of this file.
33 * rewrite arith.y to micro stack based cryptic algorithm by
34 * Copyright (c) 2001 Aaron Lehmann <aaronl@vitelus.com>
36 * Modified by Paul Mundt <lethal@linux-sh.org> (c) 2004 to support
39 * Modified by Vladimir Oleynik <dzo@simtreas.ru> (c) 2001-2004 to be
40 * used in busybox and size optimizations,
41 * rewrote arith (see notes to this), added locale support,
42 * rewrote dynamic variables.
48 * The follow should be set to reflect the type of system you have:
49 * JOBS -> 1 if you have Berkeley job control, 0 otherwise.
50 * define SYSV if you are running under System V.
51 * define DEBUG=1 to compile in debugging ('set -o debug' to turn on)
52 * define DEBUG=2 to compile in and turn on debugging.
54 * When debugging is on, debugging info will be written to ./trace and
55 * a quit signal will generate a core dump.
68 #include <sys/types.h>
69 #include <sys/cdefs.h>
70 #include <sys/ioctl.h>
71 #include <sys/param.h>
72 #include <sys/resource.h>
102 #ifdef CONFIG_ASH_JOB_CONTROL
116 static int *dash_errno;
118 #define errno (*dash_errno)
121 #if defined(__uClinux__)
122 #error "Do not even bother, ash will not run on uClinux"
126 #define _DIAGASSERT(assert_expr) assert(assert_expr)
128 #define _DIAGASSERT(assert_expr)
132 #ifdef CONFIG_ASH_ALIAS
133 /* $NetBSD: alias.h,v 1.5 2002/11/24 22:35:38 christos Exp $ */
145 static struct alias *lookupalias(const char *, int);
146 static int aliascmd(int, char **);
147 static int unaliascmd(int, char **);
148 static void rmaliases(void);
149 static int unalias(const char *);
150 static void printalias(const struct alias *);
153 /* $NetBSD: cd.h,v 1.3 2002/11/24 22:35:39 christos Exp $ */
156 static void setpwd(const char *, int);
158 /* $NetBSD: error.h,v 1.15 2002/11/24 22:35:39 christos Exp $ */
162 * Types of operations (passed to the errmsg routine).
166 static const char not_found_msg[] = "%s: not found";
169 #define E_OPEN "No such file" /* opening a file */
170 #define E_CREAT "Directory nonexistent" /* creating a file */
171 #define E_EXEC not_found_msg+4 /* executing a program */
174 * We enclose jmp_buf in a structure so that we can declare pointers to
175 * jump locations. The global variable handler contains the location to
176 * jump to when an exception occurs, and the global variable exception
177 * contains a code identifying the exception. To implement nested
178 * exception handlers, the user should save the value of handler on entry
179 * to an inner scope, set handler to point to a jmploc structure for the
180 * inner scope, and restore handler on exit from the scope.
187 static struct jmploc *handler;
188 static int exception;
189 static volatile int suppressint;
190 static volatile sig_atomic_t intpending;
192 static int exerrno; /* Last exec error, error for EXEXEC */
195 #define EXINT 0 /* SIGINT received */
196 #define EXERROR 1 /* a generic error */
197 #define EXSHELLPROC 2 /* execute a shell procedure */
198 #define EXEXEC 3 /* command execution failed */
199 #define EXEXIT 4 /* exit the shell */
200 #define EXSIG 5 /* trapped signal in wait(1) */
203 /* do we generate EXSIG events */
205 /* last pending signal */
206 static volatile sig_atomic_t pendingsigs;
209 * These macros allow the user to suspend the handling of interrupt signals
210 * over a period of time. This is similar to SIGHOLD to or sigblock, but
211 * much more efficient and portable. (But hacking the kernel is so much
212 * more fun than worrying about efficiency and portability. :-))
215 #define barrier() ({ __asm__ __volatile__ ("": : :"memory"); })
222 #define SAVEINT(v) ((v) = suppressint)
223 #define RESTOREINT(v) \
226 if ((suppressint = (v)) == 0 && intpending) onint(); \
237 /* EXSIG is turned off by evalbltin(). */
240 static void exraise(int) __attribute__((__noreturn__));
241 static void onint(void) __attribute__((__noreturn__));
243 static void error(const char *, ...) __attribute__((__noreturn__));
244 static void exerror(int, const char *, ...) __attribute__((__noreturn__));
246 static void sh_warnx(const char *, ...);
248 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
251 if (--suppressint == 0 && intpending) {
255 #define INTON inton()
256 static void forceinton(void)
262 #define FORCEINTON forceinton()
267 if (--suppressint == 0 && intpending) onint(); \
274 if (intpending) onint(); \
277 #endif /* CONFIG_ASH_OPTIMIZE_FOR_SIZE */
280 * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
281 * so we use _setjmp instead.
284 #if defined(BSD) && !defined(__SVR4) && !defined(__GLIBC__)
285 #define setjmp(jmploc) _setjmp(jmploc)
286 #define longjmp(jmploc, val) _longjmp(jmploc, val)
289 /* $NetBSD: expand.h,v 1.13 2002/11/24 22:35:40 christos Exp $ */
292 struct strlist *next;
298 struct strlist *list;
299 struct strlist **lastp;
305 #define EXP_FULL 0x1 /* perform word splitting & file globbing */
306 #define EXP_TILDE 0x2 /* do normal tilde expansion */
307 #define EXP_VARTILDE 0x4 /* expand tildes in an assignment */
308 #define EXP_REDIR 0x8 /* file glob for a redirection (1 match only) */
309 #define EXP_CASE 0x10 /* keeps quotes around for CASE pattern */
310 #define EXP_RECORD 0x20 /* need to record arguments for ifs breakup */
311 #define EXP_VARTILDE2 0x40 /* expand tildes after colons only */
312 #define EXP_WORD 0x80 /* expand word in parameter expansion */
313 #define EXP_QWORD 0x100 /* expand word in quoted parameter expansion */
317 static void expandarg(union node *, struct arglist *, int);
318 #define rmescapes(p) _rmescapes((p), 0)
319 static char *_rmescapes(char *, int);
320 static int casematch(union node *, char *);
322 #ifdef CONFIG_ASH_MATH_SUPPORT
323 static void expari(int);
326 /* $NetBSD: eval.h,v 1.13 2002/11/24 22:35:39 christos Exp $ */
328 static char *commandname; /* currently executing command */
329 static struct strlist *cmdenviron; /* environment for builtin command */
330 static int exitstatus; /* exit status of last command */
331 static int back_exitstatus; /* exit status of backquoted command */
334 struct backcmd { /* result of evalbackcmd */
335 int fd; /* file descriptor to read from */
336 char *buf; /* buffer */
337 int nleft; /* number of chars in buffer */
338 struct job *jp; /* job structure for command */
342 * This file was generated by the mknodes program.
378 union node *redirect;
385 struct nodelist *cmdlist;
392 union node *redirect;
407 union node *elsepart;
438 struct nodelist *backquote;
478 struct nredir nredir;
479 struct nbinary nbinary;
483 struct nclist nclist;
493 struct nodelist *next;
504 static void freefunc(struct funcnode *);
505 /* $NetBSD: parser.h,v 1.15 2002/11/24 22:35:42 christos Exp $ */
507 /* control characters in argument strings */
508 #define CTL_FIRST '\201' /* first 'special' character */
509 #define CTLESC '\201' /* escape next character */
510 #define CTLVAR '\202' /* variable defn */
511 #define CTLENDVAR '\203'
512 #define CTLBACKQ '\204'
513 #define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */
514 /* CTLBACKQ | CTLQUOTE == '\205' */
515 #define CTLARI '\206' /* arithmetic expression */
516 #define CTLENDARI '\207'
517 #define CTLQUOTEMARK '\210'
518 #define CTL_LAST '\210' /* last 'special' character */
520 /* variable substitution byte (follows CTLVAR) */
521 #define VSTYPE 0x0f /* type of variable substitution */
522 #define VSNUL 0x10 /* colon--treat the empty string as unset */
523 #define VSQUOTE 0x80 /* inside double quotes--suppress splitting */
525 /* values of VSTYPE field */
526 #define VSNORMAL 0x1 /* normal variable: $var or ${var} */
527 #define VSMINUS 0x2 /* ${var-text} */
528 #define VSPLUS 0x3 /* ${var+text} */
529 #define VSQUESTION 0x4 /* ${var?message} */
530 #define VSASSIGN 0x5 /* ${var=text} */
531 #define VSTRIMRIGHT 0x6 /* ${var%pattern} */
532 #define VSTRIMRIGHTMAX 0x7 /* ${var%%pattern} */
533 #define VSTRIMLEFT 0x8 /* ${var#pattern} */
534 #define VSTRIMLEFTMAX 0x9 /* ${var##pattern} */
535 #define VSLENGTH 0xa /* ${#var} */
537 /* values of checkkwd variable */
542 #define IBUFSIZ (BUFSIZ + 1)
545 * NEOF is returned by parsecmd when it encounters an end of file. It
546 * must be distinct from NULL, so we use the address of a variable that
547 * happens to be handy.
549 static int plinno = 1; /* input line number */
551 /* number of characters left in input buffer */
552 static int parsenleft; /* copy of parsefile->nleft */
553 static int parselleft; /* copy of parsefile->lleft */
555 /* next character in input buffer */
556 static char *parsenextc; /* copy of parsefile->nextc */
559 struct strpush *prev; /* preceding string on stack */
562 #ifdef CONFIG_ASH_ALIAS
563 struct alias *ap; /* if push was associated with an alias */
565 char *string; /* remember the string since it may change */
569 struct parsefile *prev; /* preceding file on stack */
570 int linno; /* current line */
571 int fd; /* file descriptor (or -1 if string) */
572 int nleft; /* number of chars left in this line */
573 int lleft; /* number of chars left in this buffer */
574 char *nextc; /* next char in buffer */
575 char *buf; /* input buffer */
576 struct strpush *strpush; /* for pushing strings at this level */
577 struct strpush basestrpush; /* so pushing one is fast */
580 static struct parsefile basepf; /* top level input file */
581 static char basebuf[IBUFSIZ]; /* buffer for top level input file */
582 static struct parsefile *parsefile = &basepf; /* current input file */
585 static int tokpushback; /* last token pushed back */
586 #define NEOF ((union node *)&tokpushback)
587 static int parsebackquote; /* nonzero if we are inside backquotes */
588 static int doprompt; /* if set, prompt the user */
589 static int needprompt; /* true if interactive and at start of line */
590 static int lasttoken; /* last token read */
591 static char *wordtext; /* text of last word returned by readtoken */
593 static struct nodelist *backquotelist;
594 static union node *redirnode;
595 static struct heredoc *heredoc;
596 static int quoteflag; /* set if (part of) last token was quoted */
597 static int startlinno; /* line # where last token started */
599 static union node *parsecmd(int);
600 static void fixredir(union node *, const char *, int);
601 static const char *const *findkwd(const char *);
602 static char *endofname(const char *);
604 /* $NetBSD: shell.h,v 1.16 2003/01/22 20:36:04 dsl Exp $ */
606 typedef void *pointer;
608 static char nullstr[1]; /* zero length string */
609 static const char spcstr[] = " ";
610 static const char snlfmt[] = "%s\n";
611 static const char dolatstr[] = { CTLVAR, VSNORMAL|VSQUOTE, '@', '=', '\0' };
612 static const char illnum[] = "Illegal number: %s";
613 static const char homestr[] = "HOME";
616 #define TRACE(param) trace param
617 #define TRACEV(param) tracev param
620 #define TRACEV(param)
623 #if !defined(__GNUC__) || (__GNUC__ == 2 && __GNUC_MINOR__ < 96)
624 #define __builtin_expect(x, expected_value) (x)
627 #define likely(x) __builtin_expect((x),1)
642 #define TENDBQUOTE 12
660 /* first char is indicating which tokens mark the end of a list */
661 static const char *const tokname_array[] = {
676 /* the following are keywords */
695 static const char *tokname(int tok)
701 sprintf(buf + (tok >= TSEMI), "%s%c",
702 tokname_array[tok] + 1, (tok >= TSEMI ? '"' : 0));
706 /* $NetBSD: machdep.h,v 1.10 2002/10/07 14:26:08 christos Exp $ */
709 * Most machines require the value returned from malloc to be aligned
710 * in some way. The following macro will get this right on many machines.
713 #define SHELL_SIZE (sizeof(union {int i; char *cp; double d; }) - 1)
715 * It appears that grabstackstr() will barf with such alignments
716 * because stalloc() will return a string allocated in a new stackblock.
718 #define SHELL_ALIGN(nbytes) (((nbytes) + SHELL_SIZE) & ~SHELL_SIZE)
721 * This file was generated by the mksyntax program.
726 #define CWORD 0 /* character is nothing special */
727 #define CNL 1 /* newline character */
728 #define CBACK 2 /* a backslash character */
729 #define CSQUOTE 3 /* single quote */
730 #define CDQUOTE 4 /* double quote */
731 #define CENDQUOTE 5 /* a terminating quote */
732 #define CBQUOTE 6 /* backwards single quote */
733 #define CVAR 7 /* a dollar sign */
734 #define CENDVAR 8 /* a '}' character */
735 #define CLP 9 /* a left paren in arithmetic */
736 #define CRP 10 /* a right paren in arithmetic */
737 #define CENDFILE 11 /* end of file */
738 #define CCTL 12 /* like CWORD, except it must be escaped */
739 #define CSPCL 13 /* these terminate a word */
740 #define CIGN 14 /* character should be ignored */
742 #ifdef CONFIG_ASH_ALIAS
746 #define PEOA_OR_PEOF PEOA
750 #define PEOA_OR_PEOF PEOF
753 #define is_digit(c) ((unsigned)((c) - '0') <= 9)
754 #define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
755 #define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
758 * is_special(c) evaluates to 1 for c in "!#$*-0123456789?@"; 0 otherwise
759 * (assuming ascii char codes, as the original implementation did)
761 #define is_special(c) \
762 ( (((unsigned int)c) - 33 < 32) \
763 && ((0xc1ff920dUL >> (((unsigned int)c) - 33)) & 1))
765 #define digit_val(c) ((c) - '0')
768 * This file was generated by the mksyntax program.
771 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
772 #define USE_SIT_FUNCTION
775 /* number syntax index */
776 #define BASESYNTAX 0 /* not in quotes */
777 #define DQSYNTAX 1 /* in double quotes */
778 #define SQSYNTAX 2 /* in single quotes */
779 #define ARISYNTAX 3 /* in arithmetic */
781 #ifdef CONFIG_ASH_MATH_SUPPORT
782 static const char S_I_T[][4] = {
783 #ifdef CONFIG_ASH_ALIAS
784 {CSPCL, CIGN, CIGN, CIGN}, /* 0, PEOA */
786 {CSPCL, CWORD, CWORD, CWORD}, /* 1, ' ' */
787 {CNL, CNL, CNL, CNL}, /* 2, \n */
788 {CWORD, CCTL, CCTL, CWORD}, /* 3, !*-/:=?[]~ */
789 {CDQUOTE, CENDQUOTE, CWORD, CWORD}, /* 4, '"' */
790 {CVAR, CVAR, CWORD, CVAR}, /* 5, $ */
791 {CSQUOTE, CWORD, CENDQUOTE, CWORD}, /* 6, "'" */
792 {CSPCL, CWORD, CWORD, CLP}, /* 7, ( */
793 {CSPCL, CWORD, CWORD, CRP}, /* 8, ) */
794 {CBACK, CBACK, CCTL, CBACK}, /* 9, \ */
795 {CBQUOTE, CBQUOTE, CWORD, CBQUOTE}, /* 10, ` */
796 {CENDVAR, CENDVAR, CWORD, CENDVAR}, /* 11, } */
797 #ifndef USE_SIT_FUNCTION
798 {CENDFILE, CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
799 {CWORD, CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
800 {CCTL, CCTL, CCTL, CCTL} /* 14, CTLESC ... */
804 static const char S_I_T[][3] = {
805 #ifdef CONFIG_ASH_ALIAS
806 {CSPCL, CIGN, CIGN}, /* 0, PEOA */
808 {CSPCL, CWORD, CWORD}, /* 1, ' ' */
809 {CNL, CNL, CNL}, /* 2, \n */
810 {CWORD, CCTL, CCTL}, /* 3, !*-/:=?[]~ */
811 {CDQUOTE, CENDQUOTE, CWORD}, /* 4, '"' */
812 {CVAR, CVAR, CWORD}, /* 5, $ */
813 {CSQUOTE, CWORD, CENDQUOTE}, /* 6, "'" */
814 {CSPCL, CWORD, CWORD}, /* 7, ( */
815 {CSPCL, CWORD, CWORD}, /* 8, ) */
816 {CBACK, CBACK, CCTL}, /* 9, \ */
817 {CBQUOTE, CBQUOTE, CWORD}, /* 10, ` */
818 {CENDVAR, CENDVAR, CWORD}, /* 11, } */
819 #ifndef USE_SIT_FUNCTION
820 {CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */
821 {CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */
822 {CCTL, CCTL, CCTL} /* 14, CTLESC ... */
825 #endif /* CONFIG_ASH_MATH_SUPPORT */
827 #ifdef USE_SIT_FUNCTION
829 #define U_C(c) ((unsigned char)(c))
831 static int SIT(int c, int syntax)
833 static const char spec_symbls[] = "\t\n !\"$&'()*-/:;<=>?[\\]`|}~";
834 #ifdef CONFIG_ASH_ALIAS
835 static const char syntax_index_table[] = {
836 1, 2, 1, 3, 4, 5, 1, 6, /* "\t\n !\"$&'" */
837 7, 8, 3, 3, 3, 3, 1, 1, /* "()*-/:;<" */
838 3, 1, 3, 3, 9, 3, 10, 1, /* "=>?[\\]`|" */
842 static const char syntax_index_table[] = {
843 0, 1, 0, 2, 3, 4, 0, 5, /* "\t\n !\"$&'" */
844 6, 7, 2, 2, 2, 2, 0, 0, /* "()*-/:;<" */
845 2, 0, 2, 2, 8, 2, 9, 0, /* "=>?[\\]`|" */
852 if (c == PEOF) /* 2^8+2 */
854 #ifdef CONFIG_ASH_ALIAS
855 if (c == PEOA) /* 2^8+1 */
859 if (U_C(c) >= U_C(CTLESC) && U_C(c) <= U_C(CTLQUOTEMARK))
862 s = strchr(spec_symbls, c);
863 if (s == 0 || *s == 0)
865 indx = syntax_index_table[(s - spec_symbls)];
867 return S_I_T[indx][syntax];
870 #else /* USE_SIT_FUNCTION */
872 #define SIT(c, syntax) S_I_T[(int)syntax_index_table[((int)c)+SYNBASE]][syntax]
874 #ifdef CONFIG_ASH_ALIAS
875 #define CSPCL_CIGN_CIGN_CIGN 0
876 #define CSPCL_CWORD_CWORD_CWORD 1
877 #define CNL_CNL_CNL_CNL 2
878 #define CWORD_CCTL_CCTL_CWORD 3
879 #define CDQUOTE_CENDQUOTE_CWORD_CWORD 4
880 #define CVAR_CVAR_CWORD_CVAR 5
881 #define CSQUOTE_CWORD_CENDQUOTE_CWORD 6
882 #define CSPCL_CWORD_CWORD_CLP 7
883 #define CSPCL_CWORD_CWORD_CRP 8
884 #define CBACK_CBACK_CCTL_CBACK 9
885 #define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 10
886 #define CENDVAR_CENDVAR_CWORD_CENDVAR 11
887 #define CENDFILE_CENDFILE_CENDFILE_CENDFILE 12
888 #define CWORD_CWORD_CWORD_CWORD 13
889 #define CCTL_CCTL_CCTL_CCTL 14
891 #define CSPCL_CWORD_CWORD_CWORD 0
892 #define CNL_CNL_CNL_CNL 1
893 #define CWORD_CCTL_CCTL_CWORD 2
894 #define CDQUOTE_CENDQUOTE_CWORD_CWORD 3
895 #define CVAR_CVAR_CWORD_CVAR 4
896 #define CSQUOTE_CWORD_CENDQUOTE_CWORD 5
897 #define CSPCL_CWORD_CWORD_CLP 6
898 #define CSPCL_CWORD_CWORD_CRP 7
899 #define CBACK_CBACK_CCTL_CBACK 8
900 #define CBQUOTE_CBQUOTE_CWORD_CBQUOTE 9
901 #define CENDVAR_CENDVAR_CWORD_CENDVAR 10
902 #define CENDFILE_CENDFILE_CENDFILE_CENDFILE 11
903 #define CWORD_CWORD_CWORD_CWORD 12
904 #define CCTL_CCTL_CCTL_CCTL 13
907 static const char syntax_index_table[258] = {
908 /* BASESYNTAX_DQSYNTAX_SQSYNTAX_ARISYNTAX */
909 /* 0 PEOF */ CENDFILE_CENDFILE_CENDFILE_CENDFILE,
910 #ifdef CONFIG_ASH_ALIAS
911 /* 1 PEOA */ CSPCL_CIGN_CIGN_CIGN,
913 /* 2 -128 0x80 */ CWORD_CWORD_CWORD_CWORD,
914 /* 3 -127 CTLESC */ CCTL_CCTL_CCTL_CCTL,
915 /* 4 -126 CTLVAR */ CCTL_CCTL_CCTL_CCTL,
916 /* 5 -125 CTLENDVAR */ CCTL_CCTL_CCTL_CCTL,
917 /* 6 -124 CTLBACKQ */ CCTL_CCTL_CCTL_CCTL,
918 /* 7 -123 CTLQUOTE */ CCTL_CCTL_CCTL_CCTL,
919 /* 8 -122 CTLARI */ CCTL_CCTL_CCTL_CCTL,
920 /* 9 -121 CTLENDARI */ CCTL_CCTL_CCTL_CCTL,
921 /* 10 -120 CTLQUOTEMARK */ CCTL_CCTL_CCTL_CCTL,
922 /* 11 -119 */ CWORD_CWORD_CWORD_CWORD,
923 /* 12 -118 */ CWORD_CWORD_CWORD_CWORD,
924 /* 13 -117 */ CWORD_CWORD_CWORD_CWORD,
925 /* 14 -116 */ CWORD_CWORD_CWORD_CWORD,
926 /* 15 -115 */ CWORD_CWORD_CWORD_CWORD,
927 /* 16 -114 */ CWORD_CWORD_CWORD_CWORD,
928 /* 17 -113 */ CWORD_CWORD_CWORD_CWORD,
929 /* 18 -112 */ CWORD_CWORD_CWORD_CWORD,
930 /* 19 -111 */ CWORD_CWORD_CWORD_CWORD,
931 /* 20 -110 */ CWORD_CWORD_CWORD_CWORD,
932 /* 21 -109 */ CWORD_CWORD_CWORD_CWORD,
933 /* 22 -108 */ CWORD_CWORD_CWORD_CWORD,
934 /* 23 -107 */ CWORD_CWORD_CWORD_CWORD,
935 /* 24 -106 */ CWORD_CWORD_CWORD_CWORD,
936 /* 25 -105 */ CWORD_CWORD_CWORD_CWORD,
937 /* 26 -104 */ CWORD_CWORD_CWORD_CWORD,
938 /* 27 -103 */ CWORD_CWORD_CWORD_CWORD,
939 /* 28 -102 */ CWORD_CWORD_CWORD_CWORD,
940 /* 29 -101 */ CWORD_CWORD_CWORD_CWORD,
941 /* 30 -100 */ CWORD_CWORD_CWORD_CWORD,
942 /* 31 -99 */ CWORD_CWORD_CWORD_CWORD,
943 /* 32 -98 */ CWORD_CWORD_CWORD_CWORD,
944 /* 33 -97 */ CWORD_CWORD_CWORD_CWORD,
945 /* 34 -96 */ CWORD_CWORD_CWORD_CWORD,
946 /* 35 -95 */ CWORD_CWORD_CWORD_CWORD,
947 /* 36 -94 */ CWORD_CWORD_CWORD_CWORD,
948 /* 37 -93 */ CWORD_CWORD_CWORD_CWORD,
949 /* 38 -92 */ CWORD_CWORD_CWORD_CWORD,
950 /* 39 -91 */ CWORD_CWORD_CWORD_CWORD,
951 /* 40 -90 */ CWORD_CWORD_CWORD_CWORD,
952 /* 41 -89 */ CWORD_CWORD_CWORD_CWORD,
953 /* 42 -88 */ CWORD_CWORD_CWORD_CWORD,
954 /* 43 -87 */ CWORD_CWORD_CWORD_CWORD,
955 /* 44 -86 */ CWORD_CWORD_CWORD_CWORD,
956 /* 45 -85 */ CWORD_CWORD_CWORD_CWORD,
957 /* 46 -84 */ CWORD_CWORD_CWORD_CWORD,
958 /* 47 -83 */ CWORD_CWORD_CWORD_CWORD,
959 /* 48 -82 */ CWORD_CWORD_CWORD_CWORD,
960 /* 49 -81 */ CWORD_CWORD_CWORD_CWORD,
961 /* 50 -80 */ CWORD_CWORD_CWORD_CWORD,
962 /* 51 -79 */ CWORD_CWORD_CWORD_CWORD,
963 /* 52 -78 */ CWORD_CWORD_CWORD_CWORD,
964 /* 53 -77 */ CWORD_CWORD_CWORD_CWORD,
965 /* 54 -76 */ CWORD_CWORD_CWORD_CWORD,
966 /* 55 -75 */ CWORD_CWORD_CWORD_CWORD,
967 /* 56 -74 */ CWORD_CWORD_CWORD_CWORD,
968 /* 57 -73 */ CWORD_CWORD_CWORD_CWORD,
969 /* 58 -72 */ CWORD_CWORD_CWORD_CWORD,
970 /* 59 -71 */ CWORD_CWORD_CWORD_CWORD,
971 /* 60 -70 */ CWORD_CWORD_CWORD_CWORD,
972 /* 61 -69 */ CWORD_CWORD_CWORD_CWORD,
973 /* 62 -68 */ CWORD_CWORD_CWORD_CWORD,
974 /* 63 -67 */ CWORD_CWORD_CWORD_CWORD,
975 /* 64 -66 */ CWORD_CWORD_CWORD_CWORD,
976 /* 65 -65 */ CWORD_CWORD_CWORD_CWORD,
977 /* 66 -64 */ CWORD_CWORD_CWORD_CWORD,
978 /* 67 -63 */ CWORD_CWORD_CWORD_CWORD,
979 /* 68 -62 */ CWORD_CWORD_CWORD_CWORD,
980 /* 69 -61 */ CWORD_CWORD_CWORD_CWORD,
981 /* 70 -60 */ CWORD_CWORD_CWORD_CWORD,
982 /* 71 -59 */ CWORD_CWORD_CWORD_CWORD,
983 /* 72 -58 */ CWORD_CWORD_CWORD_CWORD,
984 /* 73 -57 */ CWORD_CWORD_CWORD_CWORD,
985 /* 74 -56 */ CWORD_CWORD_CWORD_CWORD,
986 /* 75 -55 */ CWORD_CWORD_CWORD_CWORD,
987 /* 76 -54 */ CWORD_CWORD_CWORD_CWORD,
988 /* 77 -53 */ CWORD_CWORD_CWORD_CWORD,
989 /* 78 -52 */ CWORD_CWORD_CWORD_CWORD,
990 /* 79 -51 */ CWORD_CWORD_CWORD_CWORD,
991 /* 80 -50 */ CWORD_CWORD_CWORD_CWORD,
992 /* 81 -49 */ CWORD_CWORD_CWORD_CWORD,
993 /* 82 -48 */ CWORD_CWORD_CWORD_CWORD,
994 /* 83 -47 */ CWORD_CWORD_CWORD_CWORD,
995 /* 84 -46 */ CWORD_CWORD_CWORD_CWORD,
996 /* 85 -45 */ CWORD_CWORD_CWORD_CWORD,
997 /* 86 -44 */ CWORD_CWORD_CWORD_CWORD,
998 /* 87 -43 */ CWORD_CWORD_CWORD_CWORD,
999 /* 88 -42 */ CWORD_CWORD_CWORD_CWORD,
1000 /* 89 -41 */ CWORD_CWORD_CWORD_CWORD,
1001 /* 90 -40 */ CWORD_CWORD_CWORD_CWORD,
1002 /* 91 -39 */ CWORD_CWORD_CWORD_CWORD,
1003 /* 92 -38 */ CWORD_CWORD_CWORD_CWORD,
1004 /* 93 -37 */ CWORD_CWORD_CWORD_CWORD,
1005 /* 94 -36 */ CWORD_CWORD_CWORD_CWORD,
1006 /* 95 -35 */ CWORD_CWORD_CWORD_CWORD,
1007 /* 96 -34 */ CWORD_CWORD_CWORD_CWORD,
1008 /* 97 -33 */ CWORD_CWORD_CWORD_CWORD,
1009 /* 98 -32 */ CWORD_CWORD_CWORD_CWORD,
1010 /* 99 -31 */ CWORD_CWORD_CWORD_CWORD,
1011 /* 100 -30 */ CWORD_CWORD_CWORD_CWORD,
1012 /* 101 -29 */ CWORD_CWORD_CWORD_CWORD,
1013 /* 102 -28 */ CWORD_CWORD_CWORD_CWORD,
1014 /* 103 -27 */ CWORD_CWORD_CWORD_CWORD,
1015 /* 104 -26 */ CWORD_CWORD_CWORD_CWORD,
1016 /* 105 -25 */ CWORD_CWORD_CWORD_CWORD,
1017 /* 106 -24 */ CWORD_CWORD_CWORD_CWORD,
1018 /* 107 -23 */ CWORD_CWORD_CWORD_CWORD,
1019 /* 108 -22 */ CWORD_CWORD_CWORD_CWORD,
1020 /* 109 -21 */ CWORD_CWORD_CWORD_CWORD,
1021 /* 110 -20 */ CWORD_CWORD_CWORD_CWORD,
1022 /* 111 -19 */ CWORD_CWORD_CWORD_CWORD,
1023 /* 112 -18 */ CWORD_CWORD_CWORD_CWORD,
1024 /* 113 -17 */ CWORD_CWORD_CWORD_CWORD,
1025 /* 114 -16 */ CWORD_CWORD_CWORD_CWORD,
1026 /* 115 -15 */ CWORD_CWORD_CWORD_CWORD,
1027 /* 116 -14 */ CWORD_CWORD_CWORD_CWORD,
1028 /* 117 -13 */ CWORD_CWORD_CWORD_CWORD,
1029 /* 118 -12 */ CWORD_CWORD_CWORD_CWORD,
1030 /* 119 -11 */ CWORD_CWORD_CWORD_CWORD,
1031 /* 120 -10 */ CWORD_CWORD_CWORD_CWORD,
1032 /* 121 -9 */ CWORD_CWORD_CWORD_CWORD,
1033 /* 122 -8 */ CWORD_CWORD_CWORD_CWORD,
1034 /* 123 -7 */ CWORD_CWORD_CWORD_CWORD,
1035 /* 124 -6 */ CWORD_CWORD_CWORD_CWORD,
1036 /* 125 -5 */ CWORD_CWORD_CWORD_CWORD,
1037 /* 126 -4 */ CWORD_CWORD_CWORD_CWORD,
1038 /* 127 -3 */ CWORD_CWORD_CWORD_CWORD,
1039 /* 128 -2 */ CWORD_CWORD_CWORD_CWORD,
1040 /* 129 -1 */ CWORD_CWORD_CWORD_CWORD,
1041 /* 130 0 */ CWORD_CWORD_CWORD_CWORD,
1042 /* 131 1 */ CWORD_CWORD_CWORD_CWORD,
1043 /* 132 2 */ CWORD_CWORD_CWORD_CWORD,
1044 /* 133 3 */ CWORD_CWORD_CWORD_CWORD,
1045 /* 134 4 */ CWORD_CWORD_CWORD_CWORD,
1046 /* 135 5 */ CWORD_CWORD_CWORD_CWORD,
1047 /* 136 6 */ CWORD_CWORD_CWORD_CWORD,
1048 /* 137 7 */ CWORD_CWORD_CWORD_CWORD,
1049 /* 138 8 */ CWORD_CWORD_CWORD_CWORD,
1050 /* 139 9 "\t" */ CSPCL_CWORD_CWORD_CWORD,
1051 /* 140 10 "\n" */ CNL_CNL_CNL_CNL,
1052 /* 141 11 */ CWORD_CWORD_CWORD_CWORD,
1053 /* 142 12 */ CWORD_CWORD_CWORD_CWORD,
1054 /* 143 13 */ CWORD_CWORD_CWORD_CWORD,
1055 /* 144 14 */ CWORD_CWORD_CWORD_CWORD,
1056 /* 145 15 */ CWORD_CWORD_CWORD_CWORD,
1057 /* 146 16 */ CWORD_CWORD_CWORD_CWORD,
1058 /* 147 17 */ CWORD_CWORD_CWORD_CWORD,
1059 /* 148 18 */ CWORD_CWORD_CWORD_CWORD,
1060 /* 149 19 */ CWORD_CWORD_CWORD_CWORD,
1061 /* 150 20 */ CWORD_CWORD_CWORD_CWORD,
1062 /* 151 21 */ CWORD_CWORD_CWORD_CWORD,
1063 /* 152 22 */ CWORD_CWORD_CWORD_CWORD,
1064 /* 153 23 */ CWORD_CWORD_CWORD_CWORD,
1065 /* 154 24 */ CWORD_CWORD_CWORD_CWORD,
1066 /* 155 25 */ CWORD_CWORD_CWORD_CWORD,
1067 /* 156 26 */ CWORD_CWORD_CWORD_CWORD,
1068 /* 157 27 */ CWORD_CWORD_CWORD_CWORD,
1069 /* 158 28 */ CWORD_CWORD_CWORD_CWORD,
1070 /* 159 29 */ CWORD_CWORD_CWORD_CWORD,
1071 /* 160 30 */ CWORD_CWORD_CWORD_CWORD,
1072 /* 161 31 */ CWORD_CWORD_CWORD_CWORD,
1073 /* 162 32 " " */ CSPCL_CWORD_CWORD_CWORD,
1074 /* 163 33 "!" */ CWORD_CCTL_CCTL_CWORD,
1075 /* 164 34 """ */ CDQUOTE_CENDQUOTE_CWORD_CWORD,
1076 /* 165 35 "#" */ CWORD_CWORD_CWORD_CWORD,
1077 /* 166 36 "$" */ CVAR_CVAR_CWORD_CVAR,
1078 /* 167 37 "%" */ CWORD_CWORD_CWORD_CWORD,
1079 /* 168 38 "&" */ CSPCL_CWORD_CWORD_CWORD,
1080 /* 169 39 "'" */ CSQUOTE_CWORD_CENDQUOTE_CWORD,
1081 /* 170 40 "(" */ CSPCL_CWORD_CWORD_CLP,
1082 /* 171 41 ")" */ CSPCL_CWORD_CWORD_CRP,
1083 /* 172 42 "*" */ CWORD_CCTL_CCTL_CWORD,
1084 /* 173 43 "+" */ CWORD_CWORD_CWORD_CWORD,
1085 /* 174 44 "," */ CWORD_CWORD_CWORD_CWORD,
1086 /* 175 45 "-" */ CWORD_CCTL_CCTL_CWORD,
1087 /* 176 46 "." */ CWORD_CWORD_CWORD_CWORD,
1088 /* 177 47 "/" */ CWORD_CCTL_CCTL_CWORD,
1089 /* 178 48 "0" */ CWORD_CWORD_CWORD_CWORD,
1090 /* 179 49 "1" */ CWORD_CWORD_CWORD_CWORD,
1091 /* 180 50 "2" */ CWORD_CWORD_CWORD_CWORD,
1092 /* 181 51 "3" */ CWORD_CWORD_CWORD_CWORD,
1093 /* 182 52 "4" */ CWORD_CWORD_CWORD_CWORD,
1094 /* 183 53 "5" */ CWORD_CWORD_CWORD_CWORD,
1095 /* 184 54 "6" */ CWORD_CWORD_CWORD_CWORD,
1096 /* 185 55 "7" */ CWORD_CWORD_CWORD_CWORD,
1097 /* 186 56 "8" */ CWORD_CWORD_CWORD_CWORD,
1098 /* 187 57 "9" */ CWORD_CWORD_CWORD_CWORD,
1099 /* 188 58 ":" */ CWORD_CCTL_CCTL_CWORD,
1100 /* 189 59 ";" */ CSPCL_CWORD_CWORD_CWORD,
1101 /* 190 60 "<" */ CSPCL_CWORD_CWORD_CWORD,
1102 /* 191 61 "=" */ CWORD_CCTL_CCTL_CWORD,
1103 /* 192 62 ">" */ CSPCL_CWORD_CWORD_CWORD,
1104 /* 193 63 "?" */ CWORD_CCTL_CCTL_CWORD,
1105 /* 194 64 "@" */ CWORD_CWORD_CWORD_CWORD,
1106 /* 195 65 "A" */ CWORD_CWORD_CWORD_CWORD,
1107 /* 196 66 "B" */ CWORD_CWORD_CWORD_CWORD,
1108 /* 197 67 "C" */ CWORD_CWORD_CWORD_CWORD,
1109 /* 198 68 "D" */ CWORD_CWORD_CWORD_CWORD,
1110 /* 199 69 "E" */ CWORD_CWORD_CWORD_CWORD,
1111 /* 200 70 "F" */ CWORD_CWORD_CWORD_CWORD,
1112 /* 201 71 "G" */ CWORD_CWORD_CWORD_CWORD,
1113 /* 202 72 "H" */ CWORD_CWORD_CWORD_CWORD,
1114 /* 203 73 "I" */ CWORD_CWORD_CWORD_CWORD,
1115 /* 204 74 "J" */ CWORD_CWORD_CWORD_CWORD,
1116 /* 205 75 "K" */ CWORD_CWORD_CWORD_CWORD,
1117 /* 206 76 "L" */ CWORD_CWORD_CWORD_CWORD,
1118 /* 207 77 "M" */ CWORD_CWORD_CWORD_CWORD,
1119 /* 208 78 "N" */ CWORD_CWORD_CWORD_CWORD,
1120 /* 209 79 "O" */ CWORD_CWORD_CWORD_CWORD,
1121 /* 210 80 "P" */ CWORD_CWORD_CWORD_CWORD,
1122 /* 211 81 "Q" */ CWORD_CWORD_CWORD_CWORD,
1123 /* 212 82 "R" */ CWORD_CWORD_CWORD_CWORD,
1124 /* 213 83 "S" */ CWORD_CWORD_CWORD_CWORD,
1125 /* 214 84 "T" */ CWORD_CWORD_CWORD_CWORD,
1126 /* 215 85 "U" */ CWORD_CWORD_CWORD_CWORD,
1127 /* 216 86 "V" */ CWORD_CWORD_CWORD_CWORD,
1128 /* 217 87 "W" */ CWORD_CWORD_CWORD_CWORD,
1129 /* 218 88 "X" */ CWORD_CWORD_CWORD_CWORD,
1130 /* 219 89 "Y" */ CWORD_CWORD_CWORD_CWORD,
1131 /* 220 90 "Z" */ CWORD_CWORD_CWORD_CWORD,
1132 /* 221 91 "[" */ CWORD_CCTL_CCTL_CWORD,
1133 /* 222 92 "\" */ CBACK_CBACK_CCTL_CBACK,
1134 /* 223 93 "]" */ CWORD_CCTL_CCTL_CWORD,
1135 /* 224 94 "^" */ CWORD_CWORD_CWORD_CWORD,
1136 /* 225 95 "_" */ CWORD_CWORD_CWORD_CWORD,
1137 /* 226 96 "`" */ CBQUOTE_CBQUOTE_CWORD_CBQUOTE,
1138 /* 227 97 "a" */ CWORD_CWORD_CWORD_CWORD,
1139 /* 228 98 "b" */ CWORD_CWORD_CWORD_CWORD,
1140 /* 229 99 "c" */ CWORD_CWORD_CWORD_CWORD,
1141 /* 230 100 "d" */ CWORD_CWORD_CWORD_CWORD,
1142 /* 231 101 "e" */ CWORD_CWORD_CWORD_CWORD,
1143 /* 232 102 "f" */ CWORD_CWORD_CWORD_CWORD,
1144 /* 233 103 "g" */ CWORD_CWORD_CWORD_CWORD,
1145 /* 234 104 "h" */ CWORD_CWORD_CWORD_CWORD,
1146 /* 235 105 "i" */ CWORD_CWORD_CWORD_CWORD,
1147 /* 236 106 "j" */ CWORD_CWORD_CWORD_CWORD,
1148 /* 237 107 "k" */ CWORD_CWORD_CWORD_CWORD,
1149 /* 238 108 "l" */ CWORD_CWORD_CWORD_CWORD,
1150 /* 239 109 "m" */ CWORD_CWORD_CWORD_CWORD,
1151 /* 240 110 "n" */ CWORD_CWORD_CWORD_CWORD,
1152 /* 241 111 "o" */ CWORD_CWORD_CWORD_CWORD,
1153 /* 242 112 "p" */ CWORD_CWORD_CWORD_CWORD,
1154 /* 243 113 "q" */ CWORD_CWORD_CWORD_CWORD,
1155 /* 244 114 "r" */ CWORD_CWORD_CWORD_CWORD,
1156 /* 245 115 "s" */ CWORD_CWORD_CWORD_CWORD,
1157 /* 246 116 "t" */ CWORD_CWORD_CWORD_CWORD,
1158 /* 247 117 "u" */ CWORD_CWORD_CWORD_CWORD,
1159 /* 248 118 "v" */ CWORD_CWORD_CWORD_CWORD,
1160 /* 249 119 "w" */ CWORD_CWORD_CWORD_CWORD,
1161 /* 250 120 "x" */ CWORD_CWORD_CWORD_CWORD,
1162 /* 251 121 "y" */ CWORD_CWORD_CWORD_CWORD,
1163 /* 252 122 "z" */ CWORD_CWORD_CWORD_CWORD,
1164 /* 253 123 "{" */ CWORD_CWORD_CWORD_CWORD,
1165 /* 254 124 "|" */ CSPCL_CWORD_CWORD_CWORD,
1166 /* 255 125 "}" */ CENDVAR_CENDVAR_CWORD_CENDVAR,
1167 /* 256 126 "~" */ CWORD_CCTL_CCTL_CWORD,
1168 /* 257 127 */ CWORD_CWORD_CWORD_CWORD,
1171 #endif /* USE_SIT_FUNCTION */
1173 /* $NetBSD: alias.c,v 1.11 2002/11/24 22:35:38 christos Exp $ */
1178 static int funcblocksize; /* size of structures in function */
1179 static int funcstringsize; /* size of strings in node */
1180 static pointer funcblock; /* block to allocate function from */
1181 static char *funcstring; /* block to allocate strings from */
1183 static const short nodesize[26] = {
1184 SHELL_ALIGN(sizeof (struct ncmd)),
1185 SHELL_ALIGN(sizeof (struct npipe)),
1186 SHELL_ALIGN(sizeof (struct nredir)),
1187 SHELL_ALIGN(sizeof (struct nredir)),
1188 SHELL_ALIGN(sizeof (struct nredir)),
1189 SHELL_ALIGN(sizeof (struct nbinary)),
1190 SHELL_ALIGN(sizeof (struct nbinary)),
1191 SHELL_ALIGN(sizeof (struct nbinary)),
1192 SHELL_ALIGN(sizeof (struct nif)),
1193 SHELL_ALIGN(sizeof (struct nbinary)),
1194 SHELL_ALIGN(sizeof (struct nbinary)),
1195 SHELL_ALIGN(sizeof (struct nfor)),
1196 SHELL_ALIGN(sizeof (struct ncase)),
1197 SHELL_ALIGN(sizeof (struct nclist)),
1198 SHELL_ALIGN(sizeof (struct narg)),
1199 SHELL_ALIGN(sizeof (struct narg)),
1200 SHELL_ALIGN(sizeof (struct nfile)),
1201 SHELL_ALIGN(sizeof (struct nfile)),
1202 SHELL_ALIGN(sizeof (struct nfile)),
1203 SHELL_ALIGN(sizeof (struct nfile)),
1204 SHELL_ALIGN(sizeof (struct nfile)),
1205 SHELL_ALIGN(sizeof (struct ndup)),
1206 SHELL_ALIGN(sizeof (struct ndup)),
1207 SHELL_ALIGN(sizeof (struct nhere)),
1208 SHELL_ALIGN(sizeof (struct nhere)),
1209 SHELL_ALIGN(sizeof (struct nnot)),
1213 static void calcsize(union node *);
1214 static void sizenodelist(struct nodelist *);
1215 static union node *copynode(union node *);
1216 static struct nodelist *copynodelist(struct nodelist *);
1217 static char *nodesavestr(char *);
1221 static void evalstring(char *);
1222 union node; /* BLETCH for ansi C */
1223 static void evaltree(union node *, int);
1224 static void evalbackcmd(union node *, struct backcmd *);
1226 /* in_function returns nonzero if we are currently evaluating a function */
1227 #define in_function() funcnest
1228 static int evalskip; /* set if we are skipping commands */
1229 static int skipcount; /* number of levels to skip */
1230 static int funcnest; /* depth of function calls */
1232 /* reasons for skipping commands (see comment on breakcmd routine) */
1239 * This file was generated by the mkbuiltins program.
1243 static int bgcmd(int, char **);
1245 static int breakcmd(int, char **);
1246 static int cdcmd(int, char **);
1247 #ifdef CONFIG_ASH_CMDCMD
1248 static int commandcmd(int, char **);
1250 static int dotcmd(int, char **);
1251 static int evalcmd(int, char **);
1252 static int execcmd(int, char **);
1253 static int exitcmd(int, char **);
1254 static int exportcmd(int, char **);
1255 static int falsecmd(int, char **);
1257 static int fgcmd(int, char **);
1259 #ifdef CONFIG_ASH_GETOPTS
1260 static int getoptscmd(int, char **);
1262 static int hashcmd(int, char **);
1263 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
1264 static int helpcmd(int argc, char **argv);
1267 static int jobscmd(int, char **);
1269 #ifdef CONFIG_ASH_MATH_SUPPORT
1270 static int letcmd(int, char **);
1272 static int localcmd(int, char **);
1273 static int pwdcmd(int, char **);
1274 static int readcmd(int, char **);
1275 static int returncmd(int, char **);
1276 static int setcmd(int, char **);
1277 static int shiftcmd(int, char **);
1278 static int timescmd(int, char **);
1279 static int trapcmd(int, char **);
1280 static int truecmd(int, char **);
1281 static int typecmd(int, char **);
1282 static int umaskcmd(int, char **);
1283 static int unsetcmd(int, char **);
1284 static int waitcmd(int, char **);
1285 static int ulimitcmd(int, char **);
1287 static int killcmd(int, char **);
1290 /* $NetBSD: mail.h,v 1.9 2002/11/24 22:35:40 christos Exp $ */
1292 #ifdef CONFIG_ASH_MAIL
1293 static void chkmail(void);
1294 static void changemail(const char *);
1297 /* $NetBSD: exec.h,v 1.20 2003/01/22 20:36:04 dsl Exp $ */
1299 /* values of cmdtype */
1300 #define CMDUNKNOWN -1 /* no entry in table for command */
1301 #define CMDNORMAL 0 /* command is an executable program */
1302 #define CMDFUNCTION 1 /* command is a shell function */
1303 #define CMDBUILTIN 2 /* command is a shell builtin */
1307 int (*builtin)(int, char **);
1308 /* unsigned flags; */
1311 #ifdef CONFIG_ASH_CMDCMD
1313 # ifdef CONFIG_ASH_ALIAS
1314 # define COMMANDCMD (builtincmd + 7)
1315 # define EXECCMD (builtincmd + 10)
1317 # define COMMANDCMD (builtincmd + 6)
1318 # define EXECCMD (builtincmd + 9)
1321 # ifdef CONFIG_ASH_ALIAS
1322 # define COMMANDCMD (builtincmd + 6)
1323 # define EXECCMD (builtincmd + 9)
1325 # define COMMANDCMD (builtincmd + 5)
1326 # define EXECCMD (builtincmd + 8)
1329 #else /* ! CONFIG_ASH_CMDCMD */
1331 # ifdef CONFIG_ASH_ALIAS
1332 # define EXECCMD (builtincmd + 9)
1334 # define EXECCMD (builtincmd + 8)
1337 # ifdef CONFIG_ASH_ALIAS
1338 # define EXECCMD (builtincmd + 8)
1340 # define EXECCMD (builtincmd + 7)
1343 #endif /* CONFIG_ASH_CMDCMD */
1345 #define BUILTIN_NOSPEC "0"
1346 #define BUILTIN_SPECIAL "1"
1347 #define BUILTIN_REGULAR "2"
1348 #define BUILTIN_SPEC_REG "3"
1349 #define BUILTIN_ASSIGN "4"
1350 #define BUILTIN_SPEC_ASSG "5"
1351 #define BUILTIN_REG_ASSG "6"
1352 #define BUILTIN_SPEC_REG_ASSG "7"
1354 #define IS_BUILTIN_SPECIAL(builtincmd) ((builtincmd)->name[0] & 1)
1355 #define IS_BUILTIN_REGULAR(builtincmd) ((builtincmd)->name[0] & 2)
1357 static const struct builtincmd builtincmd[] = {
1358 { BUILTIN_SPEC_REG ".", dotcmd },
1359 { BUILTIN_SPEC_REG ":", truecmd },
1360 #ifdef CONFIG_ASH_ALIAS
1361 { BUILTIN_REG_ASSG "alias", aliascmd },
1364 { BUILTIN_REGULAR "bg", bgcmd },
1366 { BUILTIN_SPEC_REG "break", breakcmd },
1367 { BUILTIN_REGULAR "cd", cdcmd },
1368 { BUILTIN_NOSPEC "chdir", cdcmd },
1369 #ifdef CONFIG_ASH_CMDCMD
1370 { BUILTIN_REGULAR "command", commandcmd },
1372 { BUILTIN_SPEC_REG "continue", breakcmd },
1373 { BUILTIN_SPEC_REG "eval", evalcmd },
1374 { BUILTIN_SPEC_REG "exec", execcmd },
1375 { BUILTIN_SPEC_REG "exit", exitcmd },
1376 { BUILTIN_SPEC_REG_ASSG "export", exportcmd },
1377 { BUILTIN_REGULAR "false", falsecmd },
1379 { BUILTIN_REGULAR "fg", fgcmd },
1381 #ifdef CONFIG_ASH_GETOPTS
1382 { BUILTIN_REGULAR "getopts", getoptscmd },
1384 { BUILTIN_NOSPEC "hash", hashcmd },
1385 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
1386 { BUILTIN_NOSPEC "help", helpcmd },
1389 { BUILTIN_REGULAR "jobs", jobscmd },
1390 { BUILTIN_REGULAR "kill", killcmd },
1392 #ifdef CONFIG_ASH_MATH_SUPPORT
1393 { BUILTIN_NOSPEC "let", letcmd },
1395 { BUILTIN_ASSIGN "local", localcmd },
1396 { BUILTIN_NOSPEC "pwd", pwdcmd },
1397 { BUILTIN_REGULAR "read", readcmd },
1398 { BUILTIN_SPEC_REG_ASSG "readonly", exportcmd },
1399 { BUILTIN_SPEC_REG "return", returncmd },
1400 { BUILTIN_SPEC_REG "set", setcmd },
1401 { BUILTIN_SPEC_REG "shift", shiftcmd },
1402 { BUILTIN_SPEC_REG "times", timescmd },
1403 { BUILTIN_SPEC_REG "trap", trapcmd },
1404 { BUILTIN_REGULAR "true", truecmd },
1405 { BUILTIN_NOSPEC "type", typecmd },
1406 { BUILTIN_NOSPEC "ulimit", ulimitcmd },
1407 { BUILTIN_REGULAR "umask", umaskcmd },
1408 #ifdef CONFIG_ASH_ALIAS
1409 { BUILTIN_REGULAR "unalias", unaliascmd },
1411 { BUILTIN_SPEC_REG "unset", unsetcmd },
1412 { BUILTIN_REGULAR "wait", waitcmd },
1415 #define NUMBUILTINS (sizeof (builtincmd) / sizeof (struct builtincmd) )
1423 const struct builtincmd *cmd;
1424 struct funcnode *func;
1429 /* action to find_command() */
1430 #define DO_ERR 0x01 /* prints errors */
1431 #define DO_ABS 0x02 /* checks absolute paths */
1432 #define DO_NOFUNC 0x04 /* don't return shell functions, for command */
1433 #define DO_ALTPATH 0x08 /* using alternate path */
1434 #define DO_ALTBLTIN 0x20 /* %builtin in alt. path */
1436 static const char *pathopt; /* set by padvance */
1438 static void shellexec(char **, const char *, int)
1439 __attribute__((__noreturn__));
1440 static char *padvance(const char **, const char *);
1441 static void find_command(char *, struct cmdentry *, int, const char *);
1442 static struct builtincmd *find_builtin(const char *);
1443 static void hashcd(void);
1444 static void changepath(const char *);
1445 static void defun(char *, union node *);
1446 static void unsetfunc(const char *);
1448 #ifdef CONFIG_ASH_MATH_SUPPORT_64
1449 typedef int64_t arith_t;
1451 typedef long arith_t;
1454 #ifdef CONFIG_ASH_MATH_SUPPORT
1455 static arith_t dash_arith(const char *);
1456 static arith_t arith(const char *expr, int *perrcode);
1459 #ifdef CONFIG_ASH_RANDOM_SUPPORT
1460 static unsigned long rseed;
1461 static void change_random(const char *);
1462 # ifndef DYNAMIC_VAR
1463 # define DYNAMIC_VAR
1467 /* $NetBSD: init.h,v 1.9 2002/11/24 22:35:40 christos Exp $ */
1469 static void reset(void);
1471 /* $NetBSD: var.h,v 1.21 2003/01/22 20:36:04 dsl Exp $ */
1478 #define VEXPORT 0x01 /* variable is exported */
1479 #define VREADONLY 0x02 /* variable cannot be modified */
1480 #define VSTRFIXED 0x04 /* variable struct is statically allocated */
1481 #define VTEXTFIXED 0x08 /* text is statically allocated */
1482 #define VSTACK 0x10 /* text is allocated on the stack */
1483 #define VUNSET 0x20 /* the variable is not set */
1484 #define VNOFUNC 0x40 /* don't call the callback function */
1485 #define VNOSET 0x80 /* do not set variable - just readonly test */
1486 #define VNOSAVE 0x100 /* when text is on the heap before setvareq */
1488 # define VDYNAMIC 0x200 /* dynamic variable */
1494 struct var *next; /* next entry in hash list */
1495 int flags; /* flags are defined above */
1496 const char *text; /* name=value */
1497 void (*func)(const char *); /* function to be called when */
1498 /* the variable gets set/unset */
1502 struct localvar *next; /* next local variable in list */
1503 struct var *vp; /* the variable that was made local */
1504 int flags; /* saved flags */
1505 const char *text; /* saved text */
1509 static struct localvar *localvars;
1515 #ifdef CONFIG_ASH_GETOPTS
1516 static void getoptsreset(const char *);
1519 #ifdef CONFIG_LOCALE_SUPPORT
1521 static void change_lc_all(const char *value);
1522 static void change_lc_ctype(const char *value);
1528 static const char defpathvar[] = "PATH=/usr/local/bin:/usr/bin:/sbin:/bin";
1530 static const char defifsvar[] = "IFS= \t\n";
1531 #define defifs (defifsvar + 4)
1533 static const char defifs[] = " \t\n";
1537 static struct var varinit[] = {
1539 { 0, VSTRFIXED|VTEXTFIXED, defifsvar, 0 },
1541 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "IFS\0", 0 },
1544 #ifdef CONFIG_ASH_MAIL
1545 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "MAIL\0", changemail },
1546 { 0, VSTRFIXED|VTEXTFIXED|VUNSET, "MAILPATH\0", changemail },
1549 { 0, VSTRFIXED|VTEXTFIXED, defpathvar, changepath },
1550 { 0, VSTRFIXED|VTEXTFIXED, "PS1=$ ", 0 },
1551 { 0, VSTRFIXED|VTEXTFIXED, "PS2=> ", 0 },
1552 { 0, VSTRFIXED|VTEXTFIXED, "PS4=+ ", 0 },
1553 #ifdef CONFIG_ASH_GETOPTS
1554 { 0, VSTRFIXED|VTEXTFIXED, "OPTIND=1", getoptsreset },
1556 #ifdef CONFIG_ASH_RANDOM_SUPPORT
1557 {0, VSTRFIXED|VTEXTFIXED|VUNSET|VDYNAMIC, "RANDOM\0", change_random },
1559 #ifdef CONFIG_LOCALE_SUPPORT
1560 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "LC_ALL\0", change_lc_all },
1561 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "LC_CTYPE\0", change_lc_ctype },
1563 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
1564 {0, VSTRFIXED | VTEXTFIXED | VUNSET, "HISTFILE\0", NULL },
1568 #define vifs varinit[0]
1569 #ifdef CONFIG_ASH_MAIL
1570 #define vmail (&vifs)[1]
1571 #define vmpath (&vmail)[1]
1575 #define vpath (&vmpath)[1]
1576 #define vps1 (&vpath)[1]
1577 #define vps2 (&vps1)[1]
1578 #define vps4 (&vps2)[1]
1579 #define voptind (&vps4)[1]
1580 #ifdef CONFIG_ASH_GETOPTS
1581 #define vrandom (&voptind)[1]
1583 #define vrandom (&vps4)[1]
1585 #define defpath (defpathvar + 5)
1588 * The following macros access the values of the above variables.
1589 * They have to skip over the name. They return the null string
1590 * for unset variables.
1593 #define ifsval() (vifs.text + 4)
1594 #define ifsset() ((vifs.flags & VUNSET) == 0)
1595 #define mailval() (vmail.text + 5)
1596 #define mpathval() (vmpath.text + 9)
1597 #define pathval() (vpath.text + 5)
1598 #define ps1val() (vps1.text + 4)
1599 #define ps2val() (vps2.text + 4)
1600 #define ps4val() (vps4.text + 4)
1601 #define optindval() (voptind.text + 7)
1603 #define mpathset() ((vmpath.flags & VUNSET) == 0)
1605 static void setvar(const char *, const char *, int);
1606 static void setvareq(char *, int);
1607 static void listsetvar(struct strlist *, int);
1608 static char *lookupvar(const char *);
1609 static char *bltinlookup(const char *);
1610 static char **listvars(int, int, char ***);
1611 #define environment() listvars(VEXPORT, VUNSET, 0)
1612 static int showvars(const char *, int, int);
1613 static void poplocalvars(void);
1614 static int unsetvar(const char *);
1615 #ifdef CONFIG_ASH_GETOPTS
1616 static int setvarsafe(const char *, const char *, int);
1618 static int varcmp(const char *, const char *);
1619 static struct var **hashvar(const char *);
1622 static inline int varequal(const char *a, const char *b) {
1623 return !varcmp(a, b);
1627 static int loopnest; /* current loop nesting level */
1630 * The parsefile structure pointed to by the global variable parsefile
1631 * contains information about the current file being read.
1636 struct redirtab *next;
1641 static struct redirtab *redirlist;
1642 static int nullredirs;
1644 extern char **environ;
1646 /* $NetBSD: output.h,v 1.16 2002/11/24 22:35:42 christos Exp $ */
1649 static void outstr(const char *, FILE *);
1650 static void outcslow(int, FILE *);
1651 static void flushall(void);
1652 static void flusherr(void);
1653 static int out1fmt(const char *, ...)
1654 __attribute__((__format__(__printf__,1,2)));
1655 static int fmtstr(char *, size_t, const char *, ...)
1656 __attribute__((__format__(__printf__,3,4)));
1658 static int preverrout_fd; /* save fd2 before print debug if xflag is set. */
1661 static void out1str(const char *p)
1666 static void out2str(const char *p)
1673 * Initialization code.
1677 * This routine initializes the builtin variables.
1688 * PS1 depends on uid
1690 #if defined(CONFIG_FEATURE_COMMAND_EDITING) && defined(CONFIG_FEATURE_SH_FANCY_PROMPT)
1691 vps1.text = "PS1=\\w \\$ ";
1694 vps1.text = "PS1=# ";
1697 end = vp + sizeof(varinit) / sizeof(varinit[0]);
1699 vpp = hashvar(vp->text);
1702 } while (++vp < end);
1711 basepf.nextc = basepf.buf = basebuf;
1716 signal(SIGCHLD, SIG_DFL);
1725 for (envp = environ ; *envp ; envp++) {
1726 if (strchr(*envp, '=')) {
1727 setvareq(*envp, VEXPORT|VTEXTFIXED);
1731 snprintf(ppid, sizeof(ppid), "%d", (int) getppid());
1732 setvar("PPID", ppid, 0);
1737 /* PEOF (the end of file marker) */
1740 * The input line number. Input.c just defines this variable, and saves
1741 * and restores it when files are pushed and popped. The user of this
1742 * package must set its value.
1745 static int pgetc(void);
1746 static int pgetc2(void);
1747 static int preadbuffer(void);
1748 static void pungetc(void);
1749 static void pushstring(char *, void *);
1750 static void popstring(void);
1751 static void setinputfile(const char *, int);
1752 static void setinputfd(int, int);
1753 static void setinputstring(char *);
1754 static void popfile(void);
1755 static void popallfiles(void);
1756 static void closescript(void);
1759 /* $NetBSD: jobs.h,v 1.17 2003/01/22 20:36:04 dsl Exp $ */
1762 /* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
1765 #define FORK_NOJOB 2
1767 /* mode flags for showjob(s) */
1768 #define SHOW_PGID 0x01 /* only show pgid - for jobs -p */
1769 #define SHOW_PID 0x04 /* include process pid */
1770 #define SHOW_CHANGED 0x08 /* only jobs whose state has changed */
1774 * A job structure contains information about a job. A job is either a
1775 * single process or a set of processes contained in a pipeline. In the
1776 * latter case, pidlist will be non-NULL, and will point to a -1 terminated
1781 pid_t pid; /* process id */
1782 int status; /* last process status from wait() */
1783 char *cmd; /* text of command being run */
1787 struct procstat ps0; /* status of process */
1788 struct procstat *ps; /* status or processes when more than one */
1790 int stopstatus; /* status of a stopped job */
1793 nprocs: 16, /* number of processes */
1795 #define JOBRUNNING 0 /* at least one proc running */
1796 #define JOBSTOPPED 1 /* all procs are stopped */
1797 #define JOBDONE 2 /* all procs are completed */
1799 sigint: 1, /* job was killed by SIGINT */
1800 jobctl: 1, /* job running under job control */
1802 waited: 1, /* true if this entry has been waited for */
1803 used: 1, /* true if this entry is in used */
1804 changed: 1; /* true if status has changed */
1805 struct job *prev_job; /* previous job */
1808 static pid_t backgndpid; /* pid of last background process */
1809 static int job_warning; /* user was warned about stopped jobs */
1811 static int jobctl; /* true if doing job control */
1814 static struct job *makejob(union node *, int);
1815 static int forkshell(struct job *, union node *, int);
1816 static int waitforjob(struct job *);
1817 static int stoppedjobs(void);
1820 #define setjobctl(on) /* do nothing */
1822 static void setjobctl(int);
1823 static void showjobs(FILE *, int);
1826 /* $NetBSD: main.h,v 1.9 2002/11/24 22:35:41 christos Exp $ */
1829 /* pid of main shell */
1831 /* true if we aren't a child of the main shell */
1832 static int rootshell;
1834 static void readcmdfile(char *);
1835 static void cmdloop(int);
1837 /* $NetBSD: memalloc.h,v 1.13 2003/01/22 20:36:04 dsl Exp $ */
1841 struct stack_block *stackp;
1844 struct stackmark *marknext;
1847 /* minimum size of a block */
1848 #define MINSIZE SHELL_ALIGN(504)
1850 struct stack_block {
1851 struct stack_block *prev;
1852 char space[MINSIZE];
1855 static struct stack_block stackbase;
1856 static struct stack_block *stackp = &stackbase;
1857 static struct stackmark *markp;
1858 static char *stacknxt = stackbase.space;
1859 static size_t stacknleft = MINSIZE;
1860 static char *sstrend = stackbase.space + MINSIZE;
1861 static int herefd = -1;
1864 static pointer ckmalloc(size_t);
1865 static pointer ckrealloc(pointer, size_t);
1866 static char *savestr(const char *);
1867 static pointer stalloc(size_t);
1868 static void stunalloc(pointer);
1869 static void setstackmark(struct stackmark *);
1870 static void popstackmark(struct stackmark *);
1871 static void growstackblock(void);
1872 static void *growstackstr(void);
1873 static char *makestrspace(size_t, char *);
1874 static char *stnputs(const char *, size_t, char *);
1875 static char *stputs(const char *, char *);
1878 static inline char *_STPUTC(char c, char *p) {
1885 #define stackblock() ((void *)stacknxt)
1886 #define stackblocksize() stacknleft
1887 #define STARTSTACKSTR(p) ((p) = stackblock())
1888 #define STPUTC(c, p) ((p) = _STPUTC((c), (p)))
1889 #define CHECKSTRSPACE(n, p) \
1893 size_t m = sstrend - q; \
1895 (p) = makestrspace(l, q); \
1898 #define USTPUTC(c, p) (*p++ = (c))
1899 #define STACKSTRNUL(p) ((p) == sstrend? (p = growstackstr(), *p = '\0') : (*p = '\0'))
1900 #define STUNPUTC(p) (--p)
1901 #define STTOPC(p) p[-1]
1902 #define STADJUST(amount, p) (p += (amount))
1904 #define grabstackstr(p) stalloc((char *)(p) - (char *)stackblock())
1905 #define ungrabstackstr(s, p) stunalloc((s))
1906 #define stackstrend() ((void *)sstrend)
1908 #define ckfree(p) free((pointer)(p))
1910 /* $NetBSD: mystring.h,v 1.10 2002/11/24 22:35:42 christos Exp $ */
1913 #define DOLATSTRLEN 4
1915 static char *prefix(const char *, const char *);
1916 static int number(const char *);
1917 static int is_number(const char *);
1918 static char *single_quote(const char *);
1919 static char *sstrdup(const char *);
1921 #define equal(s1, s2) (strcmp(s1, s2) == 0)
1922 #define scopy(s1, s2) ((void)strcpy(s2, s1))
1924 /* $NetBSD: options.h,v 1.16 2003/01/22 20:36:04 dsl Exp $ */
1927 int nparam; /* # of positional parameters (without $0) */
1928 unsigned char malloc; /* if parameter list dynamically allocated */
1929 char **p; /* parameter list */
1930 #ifdef CONFIG_ASH_GETOPTS
1931 int optind; /* next parameter to be processed by getopts */
1932 int optoff; /* used by getopts */
1937 #define eflag optlist[0]
1938 #define fflag optlist[1]
1939 #define Iflag optlist[2]
1940 #define iflag optlist[3]
1941 #define mflag optlist[4]
1942 #define nflag optlist[5]
1943 #define sflag optlist[6]
1944 #define xflag optlist[7]
1945 #define vflag optlist[8]
1946 #define Cflag optlist[9]
1947 #define aflag optlist[10]
1948 #define bflag optlist[11]
1949 #define uflag optlist[12]
1950 #define qflag optlist[13]
1953 #define nolog optlist[14]
1954 #define debug optlist[15]
1960 /* $NetBSD: options.c,v 1.33 2003/01/22 20:36:04 dsl Exp $ */
1963 static const char *const optletters_optnames[NOPTS] = {
1984 #define optletters(n) optletters_optnames[(n)][0]
1985 #define optnames(n) (&optletters_optnames[(n)][1])
1988 static char optlist[NOPTS];
1991 static char *arg0; /* value of $0 */
1992 static struct shparam shellparam; /* $@ current positional parameters */
1993 static char **argptr; /* argument list for builtin commands */
1994 static char *optionarg; /* set by nextopt (like getopt) */
1995 static char *optptr; /* used by nextopt */
1997 static char *minusc; /* argument to -c option */
2000 static void procargs(int, char **);
2001 static void optschanged(void);
2002 static void setparam(char **);
2003 static void freeparam(volatile struct shparam *);
2004 static int shiftcmd(int, char **);
2005 static int setcmd(int, char **);
2006 static int nextopt(const char *);
2008 /* $NetBSD: redir.h,v 1.14 2002/11/24 22:35:43 christos Exp $ */
2010 /* flags passed to redirect */
2011 #define REDIR_PUSH 01 /* save previous values of file descriptors */
2012 #define REDIR_SAVEFD2 03 /* set preverrout */
2015 static void redirect(union node *, int);
2016 static void popredir(int);
2017 static void clearredir(int);
2018 static int copyfd(int, int);
2019 static int redirectsafe(union node *, int);
2021 /* $NetBSD: show.h,v 1.6 2003/01/22 20:36:04 dsl Exp $ */
2025 static void showtree(union node *);
2026 static void trace(const char *, ...);
2027 static void tracev(const char *, va_list);
2028 static void trargs(char **);
2029 static void trputc(int);
2030 static void trputs(const char *);
2031 static void opentrace(void);
2034 /* $NetBSD: trap.h,v 1.16 2002/11/24 22:35:43 christos Exp $ */
2037 /* trap handler commands */
2038 static char *trap[NSIG];
2039 /* current value of signal */
2040 static char sigmode[NSIG - 1];
2041 /* indicates specified signal received */
2042 static char gotsig[NSIG - 1];
2044 static void clear_traps(void);
2045 static void setsignal(int);
2046 static void ignoresig(int);
2047 static void onsig(int);
2048 static void dotrap(void);
2049 static void setinteractive(int);
2050 static void exitshell(void) __attribute__((__noreturn__));
2051 static int decode_signal(const char *, int);
2054 * This routine is called when an error or an interrupt occurs in an
2055 * interactive shell and control is returned to the main command loop.
2070 parselleft = parsenleft = 0; /* clear input buffer */
2074 /* from parser.c: */
2087 #ifdef CONFIG_ASH_ALIAS
2088 static struct alias *atab[ATABSIZE];
2090 static void setalias(const char *, const char *);
2091 static struct alias *freealias(struct alias *);
2092 static struct alias **__lookupalias(const char *);
2095 setalias(const char *name, const char *val)
2097 struct alias *ap, **app;
2099 app = __lookupalias(name);
2103 if (!(ap->flag & ALIASINUSE)) {
2106 ap->val = savestr(val);
2107 ap->flag &= ~ALIASDEAD;
2110 ap = ckmalloc(sizeof (struct alias));
2111 ap->name = savestr(name);
2112 ap->val = savestr(val);
2121 unalias(const char *name)
2125 app = __lookupalias(name);
2129 *app = freealias(*app);
2140 struct alias *ap, **app;
2144 for (i = 0; i < ATABSIZE; i++) {
2146 for (ap = *app; ap; ap = *app) {
2147 *app = freealias(*app);
2156 static struct alias *
2157 lookupalias(const char *name, int check)
2159 struct alias *ap = *__lookupalias(name);
2161 if (check && ap && (ap->flag & ALIASINUSE))
2167 * TODO - sort output
2170 aliascmd(int argc, char **argv)
2179 for (i = 0; i < ATABSIZE; i++)
2180 for (ap = atab[i]; ap; ap = ap->next) {
2185 while ((n = *++argv) != NULL) {
2186 if ((v = strchr(n+1, '=')) == NULL) { /* n+1: funny ksh stuff */
2187 if ((ap = *__lookupalias(n)) == NULL) {
2188 fprintf(stderr, "%s: %s not found\n", "alias", n);
2202 unaliascmd(int argc, char **argv)
2206 while ((i = nextopt("a")) != '\0') {
2212 for (i = 0; *argptr; argptr++) {
2213 if (unalias(*argptr)) {
2214 fprintf(stderr, "%s: %s not found\n", "unalias", *argptr);
2222 static struct alias *
2223 freealias(struct alias *ap) {
2226 if (ap->flag & ALIASINUSE) {
2227 ap->flag |= ALIASDEAD;
2239 printalias(const struct alias *ap) {
2240 out1fmt("%s=%s\n", ap->name, single_quote(ap->val));
2243 static struct alias **
2244 __lookupalias(const char *name) {
2245 unsigned int hashval;
2252 ch = (unsigned char)*p;
2256 ch = (unsigned char)*++p;
2258 app = &atab[hashval % ATABSIZE];
2260 for (; *app; app = &(*app)->next) {
2261 if (equal(name, (*app)->name)) {
2268 #endif /* CONFIG_ASH_ALIAS */
2271 /* $NetBSD: cd.c,v 1.30 2003/01/22 20:36:03 dsl Exp $ */
2274 * The cd and pwd commands.
2277 #define CD_PHYSICAL 1
2280 static int docd(const char *, int);
2281 static int cdopt(void);
2283 static char *curdir = nullstr; /* current working directory */
2284 static char *physdir = nullstr; /* physical working directory */
2293 while ((i = nextopt("LP"))) {
2295 flags ^= CD_PHYSICAL;
2304 cdcmd(int argc, char **argv)
2316 dest = bltinlookup(homestr);
2317 else if (dest[0] == '-' && dest[1] == '\0') {
2318 dest = bltinlookup("OLDPWD");
2341 if (!(path = bltinlookup("CDPATH"))) {
2349 p = padvance(&path, dest);
2350 if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
2354 if (!docd(p, flags))
2359 error("can't cd to %s", dest);
2362 if (flags & CD_PRINT)
2363 out1fmt(snlfmt, curdir);
2369 * Update curdir (the name of the current directory) in response to a
2373 static inline const char *
2374 updatepwd(const char *dir)
2381 cdcomppath = sstrdup(dir);
2384 if (curdir == nullstr)
2386 new = stputs(curdir, new);
2388 new = makestrspace(strlen(dir) + 2, new);
2389 lim = stackblock() + 1;
2393 if (new > lim && *lim == '/')
2398 if (dir[1] == '/' && dir[2] != '/') {
2404 p = strtok(cdcomppath, "/");
2408 if (p[1] == '.' && p[2] == '\0') {
2415 } else if (p[1] == '\0')
2419 new = stputs(p, new);
2427 return stackblock();
2431 * Actually do the chdir. We also call hashcd to let the routines in exec.c
2432 * know that the current directory has changed.
2436 docd(const char *dest, int flags)
2438 const char *dir = 0;
2441 TRACE(("docd(\"%s\", %d) called\n", dest, flags));
2444 if (!(flags & CD_PHYSICAL)) {
2445 dir = updatepwd(dest);
2460 * Find out what the current directory is. If we already know the current
2461 * directory, this routine returns immediately.
2463 static inline char *
2466 char *dir = getcwd(0, 0);
2467 return dir ? dir : nullstr;
2471 pwdcmd(int argc, char **argv)
2474 const char *dir = curdir;
2478 if (physdir == nullstr)
2482 out1fmt(snlfmt, dir);
2487 setpwd(const char *val, int setold)
2491 oldcur = dir = curdir;
2494 setvar("OLDPWD", oldcur, VEXPORT);
2497 if (physdir != nullstr) {
2498 if (physdir != oldcur)
2502 if (oldcur == val || !val) {
2509 if (oldcur != dir && oldcur != nullstr) {
2514 setvar("PWD", dir, VEXPORT);
2517 /* $NetBSD: error.c,v 1.30 2003/01/22 20:36:03 dsl Exp $ */
2520 * Errors and exceptions.
2524 * Code to handle exceptions in C.
2529 static void exverror(int, const char *, va_list)
2530 __attribute__((__noreturn__));
2533 * Called to raise an exception. Since C doesn't include exceptions, we
2534 * just do a longjmp to the exception handler. The type of exception is
2535 * stored in the global variable "exception".
2542 if (handler == NULL)
2548 longjmp(handler->loc, 1);
2553 * Called from trap.c when a SIGINT is received. (If the user specifies
2554 * that SIGINT is to be trapped or ignored using the trap builtin, then
2555 * this routine is not called.) Suppressint is nonzero when interrupts
2556 * are held using the INTOFF macro. (The test for iflag is just
2557 * defensive programming.)
2567 if (gotsig[SIGINT - 1] && !trap[SIGINT]) {
2568 if (!(rootshell && iflag)) {
2569 signal(SIGINT, SIG_DFL);
2579 exvwarning(const char *msg, va_list ap)
2592 fprintf(errs, fmt, name, startlinno);
2593 vfprintf(errs, msg, ap);
2594 outcslow('\n', errs);
2598 * Exverror is called to raise the error exception. If the second argument
2599 * is not NULL then error prints an error message using printf style
2600 * formatting. It then raises the error exception.
2603 exverror(int cond, const char *msg, va_list ap)
2607 TRACE(("exverror(%d, \"", cond));
2609 TRACE(("\") pid=%d\n", getpid()));
2611 TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
2614 exvwarning(msg, ap);
2623 error(const char *msg, ...)
2628 exverror(EXERROR, msg, ap);
2635 exerror(int cond, const char *msg, ...)
2640 exverror(cond, msg, ap);
2646 * error/warning routines for external builtins
2650 sh_warnx(const char *fmt, ...)
2655 exvwarning(fmt, ap);
2661 * Return a string describing an error. The returned string may be a
2662 * pointer to a static buffer that will be overwritten on the next call.
2663 * Action describes the operation that got the error.
2667 errmsg(int e, const char *em)
2669 if(e == ENOENT || e == ENOTDIR) {
2677 /* $NetBSD: eval.c,v 1.71 2003/01/23 03:33:16 rafal Exp $ */
2680 * Evaluate a command.
2683 /* flags in argument to evaltree */
2684 #define EV_EXIT 01 /* exit after evaluating tree */
2685 #define EV_TESTED 02 /* exit status is checked; ignore -e flag */
2686 #define EV_BACKCMD 04 /* command executing within back quotes */
2689 static void evalloop(union node *, int);
2690 static void evalfor(union node *, int);
2691 static void evalcase(union node *, int);
2692 static void evalsubshell(union node *, int);
2693 static void expredir(union node *);
2694 static void evalpipe(union node *, int);
2695 static void evalcommand(union node *, int);
2696 static int evalbltin(const struct builtincmd *, int, char **);
2697 static int evalfun(struct funcnode *, int, char **, int);
2698 static void prehash(union node *);
2699 static int bltincmd(int, char **);
2702 static const struct builtincmd bltin = {
2708 * Called to reset things after an exception.
2716 evalcmd(int argc, char **argv)
2725 STARTSTACKSTR(concat);
2728 concat = stputs(p, concat);
2729 if ((p = *ap++) == NULL)
2731 STPUTC(' ', concat);
2733 STPUTC('\0', concat);
2734 p = grabstackstr(concat);
2743 * Execute a command or commands contained in a string.
2750 struct stackmark smark;
2752 setstackmark(&smark);
2755 while ((n = parsecmd(0)) != NEOF) {
2757 popstackmark(&smark);
2762 popstackmark(&smark);
2768 * Evaluate a parse tree. The value is left in the global variable
2773 evaltree(union node *n, int flags)
2776 void (*evalfn)(union node *, int);
2780 TRACE(("evaltree(NULL) called\n"));
2783 TRACE(("pid %d, evaltree(%p: %d, %d) called\n",
2784 getpid(), n, n->type, flags));
2788 out1fmt("Node type = %d\n", n->type);
2793 evaltree(n->nnot.com, EV_TESTED);
2794 status = !exitstatus;
2797 expredir(n->nredir.redirect);
2798 status = redirectsafe(n->nredir.redirect, REDIR_PUSH);
2800 evaltree(n->nredir.n, flags & EV_TESTED);
2801 status = exitstatus;
2806 evalfn = evalcommand;
2808 if (eflag && !(flags & EV_TESTED))
2820 evalfn = evalsubshell;
2832 #error NAND + 1 != NOR
2834 #if NOR + 1 != NSEMI
2835 #error NOR + 1 != NSEMI
2837 isor = n->type - NAND;
2840 (flags | ((isor >> 1) - 1)) & EV_TESTED
2842 if (!exitstatus == isor)
2854 evaltree(n->nif.test, EV_TESTED);
2857 if (exitstatus == 0) {
2860 } else if (n->nif.elsepart) {
2861 n = n->nif.elsepart;
2866 defun(n->narg.text, n->narg.next);
2870 exitstatus = status;
2876 if (flags & EV_EXIT || checkexit & exitstatus)
2881 #if !defined(__alpha__) || (defined(__GNUC__) && __GNUC__ >= 3)
2884 void evaltreenr(union node *, int) __attribute__ ((alias("evaltree"),__noreturn__));
2888 evalloop(union node *n, int flags)
2898 evaltree(n->nbinary.ch1, EV_TESTED);
2900 skipping: if (evalskip == SKIPCONT && --skipcount <= 0) {
2904 if (evalskip == SKIPBREAK && --skipcount <= 0)
2909 if (n->type != NWHILE)
2913 evaltree(n->nbinary.ch2, flags);
2914 status = exitstatus;
2919 exitstatus = status;
2925 evalfor(union node *n, int flags)
2927 struct arglist arglist;
2930 struct stackmark smark;
2932 setstackmark(&smark);
2933 arglist.lastp = &arglist.list;
2934 for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
2935 expandarg(argp, &arglist, EXP_FULL | EXP_TILDE | EXP_RECORD);
2940 *arglist.lastp = NULL;
2945 for (sp = arglist.list ; sp ; sp = sp->next) {
2946 setvar(n->nfor.var, sp->text, 0);
2947 evaltree(n->nfor.body, flags);
2949 if (evalskip == SKIPCONT && --skipcount <= 0) {
2953 if (evalskip == SKIPBREAK && --skipcount <= 0)
2960 popstackmark(&smark);
2966 evalcase(union node *n, int flags)
2970 struct arglist arglist;
2971 struct stackmark smark;
2973 setstackmark(&smark);
2974 arglist.lastp = &arglist.list;
2975 expandarg(n->ncase.expr, &arglist, EXP_TILDE);
2977 for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) {
2978 for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
2979 if (casematch(patp, arglist.list->text)) {
2980 if (evalskip == 0) {
2981 evaltree(cp->nclist.body, flags);
2988 popstackmark(&smark);
2994 * Kick off a subshell to evaluate a tree.
2998 evalsubshell(union node *n, int flags)
3001 int backgnd = (n->type == NBACKGND);
3004 expredir(n->nredir.redirect);
3005 if (!backgnd && flags & EV_EXIT && !trap[0])
3009 if (forkshell(jp, n, backgnd) == 0) {
3013 flags &=~ EV_TESTED;
3015 redirect(n->nredir.redirect, 0);
3016 evaltreenr(n->nredir.n, flags);
3021 status = waitforjob(jp);
3022 exitstatus = status;
3029 * Compute the names of the files in a redirection list.
3033 expredir(union node *n)
3037 for (redir = n ; redir ; redir = redir->nfile.next) {
3039 fn.lastp = &fn.list;
3040 switch (redir->type) {
3046 expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR);
3047 redir->nfile.expfname = fn.list->text;
3051 if (redir->ndup.vname) {
3052 expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE);
3053 fixredir(redir, fn.list->text, 1);
3063 * Evaluate a pipeline. All the processes in the pipeline are children
3064 * of the process creating the pipeline. (This differs from some versions
3065 * of the shell, which make the last process in a pipeline the parent
3070 evalpipe(union node *n, int flags)
3073 struct nodelist *lp;
3078 TRACE(("evalpipe(0x%lx) called\n", (long)n));
3080 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
3084 jp = makejob(n, pipelen);
3086 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
3090 if (pipe(pip) < 0) {
3092 error("Pipe call failed");
3095 if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
3108 evaltreenr(lp->n, flags);
3116 if (n->npipe.backgnd == 0) {
3117 exitstatus = waitforjob(jp);
3118 TRACE(("evalpipe: job done exit status %d\n", exitstatus));
3126 * Execute a command inside back quotes. If it's a builtin command, we
3127 * want to save its output in a block obtained from malloc. Otherwise
3128 * we fork off a subprocess and get the output of the command via a pipe.
3129 * Should be called with interrupts off.
3133 evalbackcmd(union node *n, struct backcmd *result)
3145 saveherefd = herefd;
3153 error("Pipe call failed");
3155 if (forkshell(jp, n, FORK_NOJOB) == 0) {
3164 evaltreenr(n, EV_EXIT);
3168 result->fd = pip[0];
3171 herefd = saveherefd;
3173 TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n",
3174 result->fd, result->buf, result->nleft, result->jp));
3177 #ifdef CONFIG_ASH_CMDCMD
3178 static inline char **
3179 parse_command_args(char **argv, const char **path)
3191 if (c == '-' && !*cp) {
3201 /* run 'typecmd' for other options */
3204 } while ((c = *cp++));
3213 * Execute a simple command.
3217 evalcommand(union node *cmd, int flags)
3219 struct stackmark smark;
3221 struct arglist arglist;
3222 struct arglist varlist;
3225 const struct strlist *sp;
3226 struct cmdentry cmdentry;
3235 /* First expand the arguments. */
3236 TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags));
3237 setstackmark(&smark);
3238 back_exitstatus = 0;
3240 cmdentry.cmdtype = CMDBUILTIN;
3241 cmdentry.u.cmd = &bltin;
3242 varlist.lastp = &varlist.list;
3243 *varlist.lastp = NULL;
3244 arglist.lastp = &arglist.list;
3245 *arglist.lastp = NULL;
3248 for (argp = cmd->ncmd.args; argp; argp = argp->narg.next) {
3249 struct strlist **spp;
3251 spp = arglist.lastp;
3252 expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
3253 for (sp = *spp; sp; sp = sp->next)
3257 argv = nargv = stalloc(sizeof (char *) * (argc + 1));
3258 for (sp = arglist.list ; sp ; sp = sp->next) {
3259 TRACE(("evalcommand arg: %s\n", sp->text));
3260 *nargv++ = sp->text;
3265 if (iflag && funcnest == 0 && argc > 0)
3266 lastarg = nargv[-1];
3269 expredir(cmd->ncmd.redirect);
3270 status = redirectsafe(cmd->ncmd.redirect, REDIR_PUSH|REDIR_SAVEFD2);
3273 for (argp = cmd->ncmd.assign; argp; argp = argp->narg.next) {
3274 struct strlist **spp;
3277 spp = varlist.lastp;
3278 expandarg(argp, &varlist, EXP_VARTILDE);
3281 * Modify the command lookup path, if a PATH= assignment
3285 if (varequal(p, path))
3289 /* Print the command if xflag is set. */
3292 const char *p = " %s";
3295 dprintf(preverrout_fd, p, ps4val());
3298 for(n = 0; n < 2; n++) {
3300 dprintf(preverrout_fd, p, sp->text);
3308 bb_full_write(preverrout_fd, "\n", 1);
3314 /* Now locate the command. */
3316 const char *oldpath;
3317 int cmd_flag = DO_ERR;
3322 find_command(argv[0], &cmdentry, cmd_flag, path);
3323 if (cmdentry.cmdtype == CMDUNKNOWN) {
3329 /* implement bltin and command here */
3330 if (cmdentry.cmdtype != CMDBUILTIN)
3333 spclbltin = IS_BUILTIN_SPECIAL(cmdentry.u.cmd);
3334 if (cmdentry.u.cmd == EXECCMD)
3336 #ifdef CONFIG_ASH_CMDCMD
3337 if (cmdentry.u.cmd == COMMANDCMD) {
3340 nargv = parse_command_args(argv, &path);
3343 argc -= nargv - argv;
3345 cmd_flag |= DO_NOFUNC;
3353 /* We have a redirection error. */
3357 exitstatus = status;
3361 /* Execute the command. */
3362 switch (cmdentry.cmdtype) {
3364 /* Fork off a child process if necessary. */
3365 if (!(flags & EV_EXIT) || trap[0]) {
3367 jp = makejob(cmd, 1);
3368 if (forkshell(jp, cmd, FORK_FG) != 0) {
3369 exitstatus = waitforjob(jp);
3375 listsetvar(varlist.list, VEXPORT|VSTACK);
3376 shellexec(argv, path, cmdentry.u.index);
3380 cmdenviron = varlist.list;
3382 struct strlist *list = cmdenviron;
3384 if (spclbltin > 0 || argc == 0) {
3386 if (cmd_is_exec && argc > 1)
3389 listsetvar(list, i);
3391 if (evalbltin(cmdentry.u.cmd, argc, argv)) {
3406 exit_status = j + 128;
3407 exitstatus = exit_status;
3409 if (i == EXINT || spclbltin > 0) {
3411 longjmp(handler->loc, 1);
3418 listsetvar(varlist.list, 0);
3419 if (evalfun(cmdentry.u.func, argc, argv, flags))
3425 popredir(cmd_is_exec);
3427 /* dsl: I think this is intended to be used to support
3428 * '_' in 'vi' command mode during line editing...
3429 * However I implemented that within libedit itself.
3431 setvar("_", lastarg, 0);
3432 popstackmark(&smark);
3436 evalbltin(const struct builtincmd *cmd, int argc, char **argv) {
3437 char *volatile savecmdname;
3438 struct jmploc *volatile savehandler;
3439 struct jmploc jmploc;
3442 savecmdname = commandname;
3443 if ((i = setjmp(jmploc.loc)))
3445 savehandler = handler;
3447 commandname = argv[0];
3449 optptr = NULL; /* initialize nextopt */
3450 exitstatus = (*cmd->builtin)(argc, argv);
3453 exitstatus |= ferror(stdout);
3454 commandname = savecmdname;
3456 handler = savehandler;
3462 evalfun(struct funcnode *func, int argc, char **argv, int flags)
3464 volatile struct shparam saveparam;
3465 struct localvar *volatile savelocalvars;
3466 struct jmploc *volatile savehandler;
3467 struct jmploc jmploc;
3470 saveparam = shellparam;
3471 savelocalvars = localvars;
3472 if ((e = setjmp(jmploc.loc))) {
3476 savehandler = handler;
3479 shellparam.malloc = 0;
3482 shellparam.nparam = argc - 1;
3483 shellparam.p = argv + 1;
3484 #ifdef CONFIG_ASH_GETOPTS
3485 shellparam.optind = 1;
3486 shellparam.optoff = -1;
3489 evaltree(&func->n, flags & EV_TESTED);
3495 localvars = savelocalvars;
3496 freeparam(&shellparam);
3497 shellparam = saveparam;
3498 handler = savehandler;
3500 if (evalskip == SKIPFUNC) {
3509 goodname(const char *p)
3511 return !*endofname(p);
3515 * Search for a command. This is called before we fork so that the
3516 * location of the command will be available in the parent as well as
3517 * the child. The check for "goodname" is an overly conservative
3518 * check that the name will not be subject to expansion.
3522 prehash(union node *n)
3524 struct cmdentry entry;
3526 if (n->type == NCMD && n->ncmd.args)
3527 if (goodname(n->ncmd.args->narg.text))
3528 find_command(n->ncmd.args->narg.text, &entry, 0,
3535 * Builtin commands. Builtin commands whose functions are closely
3536 * tied to evaluation are implemented here.
3544 bltincmd(int argc, char **argv)
3547 * Preserve exitstatus of a previous possible redirection
3550 return back_exitstatus;
3555 * Handle break and continue commands. Break, continue, and return are
3556 * all handled by setting the evalskip flag. The evaluation routines
3557 * above all check this flag, and if it is set they start skipping
3558 * commands rather than executing them. The variable skipcount is
3559 * the number of loops to break/continue, or the number of function
3560 * levels to return. (The latter is always 1.) It should probably
3561 * be an error to break out of more loops than exist, but it isn't
3562 * in the standard shell so we don't make it one here.
3566 breakcmd(int argc, char **argv)
3568 int n = argc > 1 ? number(argv[1]) : 1;
3571 error(illnum, argv[1]);
3575 evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK;
3583 * The return command.
3587 returncmd(int argc, char **argv)
3589 int ret = argc > 1 ? number(argv[1]) : exitstatus;
3592 evalskip = SKIPFUNC;
3597 /* Do what ksh does; skip the rest of the file */
3598 evalskip = SKIPFILE;
3606 falsecmd(int argc, char **argv)
3613 truecmd(int argc, char **argv)
3620 execcmd(int argc, char **argv)
3623 iflag = 0; /* exit on error */
3626 shellexec(argv + 1, pathval(), 0);
3632 /* $NetBSD: exec.c,v 1.35 2003/01/22 20:36:04 dsl Exp $ */
3635 * When commands are first encountered, they are entered in a hash table.
3636 * This ensures that a full path search will not have to be done for them
3637 * on each invocation.
3639 * We should investigate converting to a linear search, even though that
3640 * would make the command name "hash" a misnomer.
3643 #define CMDTABLESIZE 31 /* should be prime */
3644 #define ARB 1 /* actual size determined at run time */
3649 struct tblentry *next; /* next entry in hash chain */
3650 union param param; /* definition of builtin function */
3651 short cmdtype; /* index identifying command */
3652 char rehash; /* if set, cd done since entry created */
3653 char cmdname[ARB]; /* name of command */
3657 static struct tblentry *cmdtable[CMDTABLESIZE];
3658 static int builtinloc = -1; /* index in path of %builtin, or -1 */
3661 static void tryexec(char *, char **, char **);
3662 static void clearcmdentry(int);
3663 static struct tblentry *cmdlookup(const char *, int);
3664 static void delete_cmd_entry(void);
3668 * Exec a program. Never returns. If you change this routine, you may
3669 * have to change the find_command routine as well.
3673 shellexec(char **argv, const char *path, int idx)
3680 envp = environment();
3681 if (strchr(argv[0], '/') != NULL
3682 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3683 || find_applet_by_name(argv[0])
3686 tryexec(argv[0], argv, envp);
3690 while ((cmdname = padvance(&path, argv[0])) != NULL) {
3691 if (--idx < 0 && pathopt == NULL) {
3692 tryexec(cmdname, argv, envp);
3693 if (errno != ENOENT && errno != ENOTDIR)
3700 /* Map to POSIX errors */
3712 TRACE(("shellexec failed for %s, errno %d, suppressint %d\n",
3713 argv[0], e, suppressint ));
3714 exerror(EXEXEC, "%s: %s", argv[0], errmsg(e, E_EXEC));
3720 tryexec(char *cmd, char **argv, char **envp)
3723 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3727 if(strchr(name, '/') == NULL && find_applet_by_name(name) != NULL) {
3735 if(strcmp(name, "busybox")) {
3736 for (ap = argv; *ap; ap++);
3737 ap = new = xmalloc((ap - argv + 2) * sizeof(char *));
3738 *ap++ = cmd = "/bin/busybox";
3739 while ((*ap++ = *argv++));
3743 cmd = "/bin/busybox";
3751 execve(cmd, argv, envp);
3752 } while (errno == EINTR);
3754 execve(cmd, argv, envp);
3758 } else if (errno == ENOEXEC) {
3762 for (ap = argv; *ap; ap++)
3764 ap = new = ckmalloc((ap - argv + 2) * sizeof(char *));
3766 *ap = cmd = (char *)DEFAULT_SHELL;
3769 while ((*ap++ = *argv++))
3779 * Do a path search. The variable path (passed by reference) should be
3780 * set to the start of the path before the first call; padvance will update
3781 * this value as it proceeds. Successive calls to padvance will return
3782 * the possible path expansions in sequence. If an option (indicated by
3783 * a percent sign) appears in the path entry then the global variable
3784 * pathopt will be set to point to it; otherwise pathopt will be set to
3789 padvance(const char **path, const char *name)
3799 for (p = start ; *p && *p != ':' && *p != '%' ; p++);
3800 len = p - start + strlen(name) + 2; /* "2" is for '/' and '\0' */
3801 while (stackblocksize() < len)
3805 memcpy(q, start, p - start);
3813 while (*p && *p != ':') p++;
3819 return stalloc(len);
3823 /*** Command hashing code ***/
3826 printentry(struct tblentry *cmdp)
3832 idx = cmdp->param.index;
3835 name = padvance(&path, cmdp->cmdname);
3837 } while (--idx >= 0);
3838 out1fmt("%s%s\n", name, (cmdp->rehash ? "*" : nullstr));
3843 hashcmd(int argc, char **argv)
3845 struct tblentry **pp;
3846 struct tblentry *cmdp;
3848 struct cmdentry entry;
3851 while ((c = nextopt("r")) != '\0') {
3855 if (*argptr == NULL) {
3856 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
3857 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
3858 if (cmdp->cmdtype == CMDNORMAL)
3865 while ((name = *argptr) != NULL) {
3866 if ((cmdp = cmdlookup(name, 0)) != NULL
3867 && (cmdp->cmdtype == CMDNORMAL
3868 || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0)))
3870 find_command(name, &entry, DO_ERR, pathval());
3871 if (entry.cmdtype == CMDUNKNOWN)
3880 * Resolve a command name. If you change this routine, you may have to
3881 * change the shellexec routine as well.
3885 find_command(char *name, struct cmdentry *entry, int act, const char *path)
3887 struct tblentry *cmdp;
3894 struct builtincmd *bcmd;
3896 /* If name contains a slash, don't use PATH or hash table */
3897 if (strchr(name, '/') != NULL) {
3898 entry->u.index = -1;
3900 while (stat(name, &statb) < 0) {
3905 entry->cmdtype = CMDUNKNOWN;
3909 entry->cmdtype = CMDNORMAL;
3913 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
3914 if (find_applet_by_name(name)) {
3915 entry->cmdtype = CMDNORMAL;
3916 entry->u.index = -1;
3921 updatetbl = (path == pathval());
3924 if (strstr(path, "%builtin") != NULL)
3928 /* If name is in the table, check answer will be ok */
3929 if ((cmdp = cmdlookup(name, 0)) != NULL) {
3932 switch (cmdp->cmdtype) {
3950 } else if (cmdp->rehash == 0)
3951 /* if not invalidated by cd, we're done */
3955 /* If %builtin not in path, check for builtin next */
3956 bcmd = find_builtin(name);
3957 if (bcmd && (IS_BUILTIN_REGULAR(bcmd) || (
3958 act & DO_ALTPATH ? !(act & DO_ALTBLTIN) : builtinloc <= 0
3960 goto builtin_success;
3962 /* We have to search path. */
3963 prev = -1; /* where to start */
3964 if (cmdp && cmdp->rehash) { /* doing a rehash */
3965 if (cmdp->cmdtype == CMDBUILTIN)
3968 prev = cmdp->param.index;
3974 while ((fullname = padvance(&path, name)) != NULL) {
3975 stunalloc(fullname);
3978 if (prefix(pathopt, "builtin")) {
3980 goto builtin_success;
3982 } else if (!(act & DO_NOFUNC) &&
3983 prefix(pathopt, "func")) {
3986 /* ignore unimplemented options */
3990 /* if rehash, don't redo absolute path names */
3991 if (fullname[0] == '/' && idx <= prev) {
3994 TRACE(("searchexec \"%s\": no change\n", name));
3997 while (stat(fullname, &statb) < 0) {
4002 if (errno != ENOENT && errno != ENOTDIR)
4006 e = EACCES; /* if we fail, this will be the error */
4007 if (!S_ISREG(statb.st_mode))
4009 if (pathopt) { /* this is a %func directory */
4010 stalloc(strlen(fullname) + 1);
4011 readcmdfile(fullname);
4012 if ((cmdp = cmdlookup(name, 0)) == NULL ||
4013 cmdp->cmdtype != CMDFUNCTION)
4014 error("%s not defined in %s", name, fullname);
4015 stunalloc(fullname);
4018 TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
4020 entry->cmdtype = CMDNORMAL;
4021 entry->u.index = idx;
4025 cmdp = cmdlookup(name, 1);
4026 cmdp->cmdtype = CMDNORMAL;
4027 cmdp->param.index = idx;
4032 /* We failed. If there was an entry for this command, delete it */
4033 if (cmdp && updatetbl)
4036 sh_warnx("%s: %s", name, errmsg(e, E_EXEC));
4037 entry->cmdtype = CMDUNKNOWN;
4042 entry->cmdtype = CMDBUILTIN;
4043 entry->u.cmd = bcmd;
4047 cmdp = cmdlookup(name, 1);
4048 cmdp->cmdtype = CMDBUILTIN;
4049 cmdp->param.cmd = bcmd;
4053 entry->cmdtype = cmdp->cmdtype;
4054 entry->u = cmdp->param;
4059 * Wrapper around strcmp for qsort/bsearch/...
4061 static int pstrcmp(const void *a, const void *b)
4063 return strcmp((const char *) a, (*(const char *const *) b) + 1);
4067 * Search the table of builtin commands.
4070 static struct builtincmd *
4071 find_builtin(const char *name)
4073 struct builtincmd *bp;
4076 name, builtincmd, NUMBUILTINS, sizeof(struct builtincmd),
4085 * Called when a cd is done. Marks all commands so the next time they
4086 * are executed they will be rehashed.
4092 struct tblentry **pp;
4093 struct tblentry *cmdp;
4095 for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
4096 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
4097 if (cmdp->cmdtype == CMDNORMAL || (
4098 cmdp->cmdtype == CMDBUILTIN &&
4099 !(IS_BUILTIN_REGULAR(cmdp->param.cmd)) &&
4110 * Fix command hash table when PATH changed.
4111 * Called before PATH is changed. The argument is the new value of PATH;
4112 * pathval() still returns the old value at this point.
4113 * Called with interrupts off.
4117 changepath(const char *newval)
4119 const char *old, *new;
4126 firstchange = 9999; /* assume no change */
4132 if ((*old == '\0' && *new == ':')
4133 || (*old == ':' && *new == '\0'))
4135 old = new; /* ignore subsequent differences */
4139 if (*new == '%' && idx_bltin < 0 && prefix(new + 1, "builtin"))
4146 if (builtinloc < 0 && idx_bltin >= 0)
4147 builtinloc = idx_bltin; /* zap builtins */
4148 if (builtinloc >= 0 && idx_bltin < 0)
4150 clearcmdentry(firstchange);
4151 builtinloc = idx_bltin;
4156 * Clear out command entries. The argument specifies the first entry in
4157 * PATH which has changed.
4161 clearcmdentry(int firstchange)
4163 struct tblentry **tblp;
4164 struct tblentry **pp;
4165 struct tblentry *cmdp;
4168 for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
4170 while ((cmdp = *pp) != NULL) {
4171 if ((cmdp->cmdtype == CMDNORMAL &&
4172 cmdp->param.index >= firstchange)
4173 || (cmdp->cmdtype == CMDBUILTIN &&
4174 builtinloc >= firstchange)) {
4188 * Locate a command in the command hash table. If "add" is nonzero,
4189 * add the command to the table if it is not already present. The
4190 * variable "lastcmdentry" is set to point to the address of the link
4191 * pointing to the entry, so that delete_cmd_entry can delete the
4194 * Interrupts must be off if called with add != 0.
4197 static struct tblentry **lastcmdentry;
4200 static struct tblentry *
4201 cmdlookup(const char *name, int add)
4203 unsigned int hashval;
4205 struct tblentry *cmdp;
4206 struct tblentry **pp;
4209 hashval = (unsigned char)*p << 4;
4211 hashval += (unsigned char)*p++;
4213 pp = &cmdtable[hashval % CMDTABLESIZE];
4214 for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
4215 if (equal(cmdp->cmdname, name))
4219 if (add && cmdp == NULL) {
4220 cmdp = *pp = ckmalloc(sizeof (struct tblentry) - ARB
4221 + strlen(name) + 1);
4223 cmdp->cmdtype = CMDUNKNOWN;
4224 strcpy(cmdp->cmdname, name);
4231 * Delete the command entry returned on the last lookup.
4235 delete_cmd_entry(void)
4237 struct tblentry *cmdp;
4240 cmdp = *lastcmdentry;
4241 *lastcmdentry = cmdp->next;
4242 if (cmdp->cmdtype == CMDFUNCTION)
4243 freefunc(cmdp->param.func);
4250 * Add a new command entry, replacing any existing command entry for
4251 * the same name - except special builtins.
4255 addcmdentry(char *name, struct cmdentry *entry)
4257 struct tblentry *cmdp;
4259 cmdp = cmdlookup(name, 1);
4260 if (cmdp->cmdtype == CMDFUNCTION) {
4261 freefunc(cmdp->param.func);
4263 cmdp->cmdtype = entry->cmdtype;
4264 cmdp->param = entry->u;
4269 * Make a copy of a parse tree.
4272 static inline struct funcnode *
4273 copyfunc(union node *n)
4278 funcblocksize = offsetof(struct funcnode, n);
4281 blocksize = funcblocksize;
4282 f = ckmalloc(blocksize + funcstringsize);
4283 funcblock = (char *) f + offsetof(struct funcnode, n);
4284 funcstring = (char *) f + blocksize;
4291 * Define a shell function.
4295 defun(char *name, union node *func)
4297 struct cmdentry entry;
4300 entry.cmdtype = CMDFUNCTION;
4301 entry.u.func = copyfunc(func);
4302 addcmdentry(name, &entry);
4308 * Delete a function if it exists.
4312 unsetfunc(const char *name)
4314 struct tblentry *cmdp;
4316 if ((cmdp = cmdlookup(name, 0)) != NULL &&
4317 cmdp->cmdtype == CMDFUNCTION)
4322 * Locate and print what a word is...
4326 #ifdef CONFIG_ASH_CMDCMD
4328 describe_command(char *command, int describe_command_verbose)
4330 #define describe_command_verbose 1
4332 describe_command(char *command)
4335 struct cmdentry entry;
4336 struct tblentry *cmdp;
4337 #ifdef CONFIG_ASH_ALIAS
4338 const struct alias *ap;
4340 const char *path = pathval();
4342 if (describe_command_verbose) {
4346 /* First look at the keywords */
4347 if (findkwd(command)) {
4348 out1str(describe_command_verbose ? " is a shell keyword" : command);
4352 #ifdef CONFIG_ASH_ALIAS
4353 /* Then look at the aliases */
4354 if ((ap = lookupalias(command, 0)) != NULL) {
4355 if (describe_command_verbose) {
4356 out1fmt(" is an alias for %s", ap->val);
4365 /* Then check if it is a tracked alias */
4366 if ((cmdp = cmdlookup(command, 0)) != NULL) {
4367 entry.cmdtype = cmdp->cmdtype;
4368 entry.u = cmdp->param;
4370 /* Finally use brute force */
4371 find_command(command, &entry, DO_ABS, path);
4374 switch (entry.cmdtype) {
4376 int j = entry.u.index;
4382 p = padvance(&path, command);
4386 if (describe_command_verbose) {
4388 (cmdp ? " a tracked alias for" : nullstr), p
4397 if (describe_command_verbose) {
4398 out1str(" is a shell function");
4405 if (describe_command_verbose) {
4406 out1fmt(" is a %sshell builtin",
4407 IS_BUILTIN_SPECIAL(entry.u.cmd) ?
4408 "special " : nullstr
4416 if (describe_command_verbose) {
4417 out1str(": not found\n");
4423 outstr("\n", stdout);
4428 typecmd(int argc, char **argv)
4433 for (i = 1; i < argc; i++) {
4434 #ifdef CONFIG_ASH_CMDCMD
4435 err |= describe_command(argv[i], 1);
4437 err |= describe_command(argv[i]);
4443 #ifdef CONFIG_ASH_CMDCMD
4445 commandcmd(int argc, char **argv)
4448 int default_path = 0;
4449 int verify_only = 0;
4450 int verbose_verify_only = 0;
4452 while ((c = nextopt("pvV")) != '\0')
4457 "command: nextopt returned character code 0%o\n", c);
4467 verbose_verify_only = 1;
4471 if (default_path + verify_only + verbose_verify_only > 1 ||
4474 "command [-p] command [arg ...]\n"
4475 "command {-v|-V} command\n");
4479 if (verify_only || verbose_verify_only) {
4480 return describe_command(*argptr, verbose_verify_only);
4487 /* $NetBSD: expand.c,v 1.56 2002/11/24 22:35:39 christos Exp $ */
4490 * Routines to expand arguments to commands. We have to deal with
4491 * backquotes, shell variables, and file metacharacters.
4497 #define RMESCAPE_ALLOC 0x1 /* Allocate a new string */
4498 #define RMESCAPE_GLOB 0x2 /* Add backslashes for glob */
4499 #define RMESCAPE_QUOTED 0x4 /* Remove CTLESC unless in quotes */
4500 #define RMESCAPE_GROW 0x8 /* Grow strings instead of stalloc */
4501 #define RMESCAPE_HEAP 0x10 /* Malloc strings instead of stalloc */
4504 * Structure specifying which parts of the string should be searched
4505 * for IFS characters.
4509 struct ifsregion *next; /* next region in list */
4510 int begoff; /* offset of start of region */
4511 int endoff; /* offset of end of region */
4512 int nulonly; /* search for nul bytes only */
4515 /* output of current string */
4516 static char *expdest;
4517 /* list of back quote expressions */
4518 static struct nodelist *argbackq;
4519 /* first struct in list of ifs regions */
4520 static struct ifsregion ifsfirst;
4521 /* last struct in list */
4522 static struct ifsregion *ifslastp;
4523 /* holds expanded arg list */
4524 static struct arglist exparg;
4526 static void argstr(char *, int);
4527 static char *exptilde(char *, char *, int);
4528 static void expbackq(union node *, int, int);
4529 static const char *subevalvar(char *, char *, int, int, int, int, int);
4530 static char *evalvar(char *, int);
4531 static void strtodest(const char *, int, int);
4532 static void memtodest(const char *p, size_t len, int syntax, int quotes);
4533 static ssize_t varvalue(char *, int, int);
4534 static void recordregion(int, int, int);
4535 static void removerecordregions(int);
4536 static void ifsbreakup(char *, struct arglist *);
4537 static void ifsfree(void);
4538 static void expandmeta(struct strlist *, int);
4539 static int patmatch(char *, const char *);
4541 static int cvtnum(arith_t);
4542 static size_t esclen(const char *, const char *);
4543 static char *scanleft(char *, char *, char *, char *, int, int);
4544 static char *scanright(char *, char *, char *, char *, int, int);
4545 static void varunset(const char *, const char *, const char *, int)
4546 __attribute__((__noreturn__));
4549 #define pmatch(a, b) !fnmatch((a), (b), 0)
4551 * Prepare a pattern for a expmeta (internal glob(3)) call.
4553 * Returns an stalloced string.
4556 static inline char *
4557 preglob(const char *pattern, int quoted, int flag) {
4558 flag |= RMESCAPE_GLOB;
4560 flag |= RMESCAPE_QUOTED;
4562 return _rmescapes((char *)pattern, flag);
4567 esclen(const char *start, const char *p) {
4570 while (p > start && *--p == CTLESC) {
4578 * Expand shell variables and backquotes inside a here document.
4582 expandhere(union node *arg, int fd)
4585 expandarg(arg, (struct arglist *)NULL, 0);
4586 bb_full_write(fd, stackblock(), expdest - (char *)stackblock());
4591 * Perform variable substitution and command substitution on an argument,
4592 * placing the resulting list of arguments in arglist. If EXP_FULL is true,
4593 * perform splitting and file name expansion. When arglist is NULL, perform
4594 * here document expansion.
4598 expandarg(union node *arg, struct arglist *arglist, int flag)
4603 argbackq = arg->narg.backquote;
4604 STARTSTACKSTR(expdest);
4605 ifsfirst.next = NULL;
4607 argstr(arg->narg.text, flag);
4608 if (arglist == NULL) {
4609 return; /* here document expanded */
4611 STPUTC('\0', expdest);
4612 p = grabstackstr(expdest);
4613 exparg.lastp = &exparg.list;
4617 if (flag & EXP_FULL) {
4618 ifsbreakup(p, &exparg);
4619 *exparg.lastp = NULL;
4620 exparg.lastp = &exparg.list;
4621 expandmeta(exparg.list, flag);
4623 if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */
4625 sp = (struct strlist *)stalloc(sizeof (struct strlist));
4628 exparg.lastp = &sp->next;
4632 *exparg.lastp = NULL;
4634 *arglist->lastp = exparg.list;
4635 arglist->lastp = exparg.lastp;
4641 * Perform variable and command substitution. If EXP_FULL is set, output CTLESC
4642 * characters to allow for further processing. Otherwise treat
4643 * $@ like $* since no splitting will be performed.
4647 argstr(char *p, int flag)
4649 static const char spclchars[] = {
4657 CTLBACKQ | CTLQUOTE,
4658 #ifdef CONFIG_ASH_MATH_SUPPORT
4663 const char *reject = spclchars;
4665 int quotes = flag & (EXP_FULL | EXP_CASE); /* do CTLESC */
4666 int breakall = flag & EXP_WORD;
4671 if (!(flag & EXP_VARTILDE)) {
4673 } else if (flag & EXP_VARTILDE2) {
4678 if (flag & EXP_TILDE) {
4684 if (*q == CTLESC && (flag & EXP_QWORD))
4687 p = exptilde(p, q, flag);
4690 startloc = expdest - (char *)stackblock();
4692 length += strcspn(p + length, reject);
4694 if (c && (!(c & 0x80)
4695 #ifdef CONFIG_ASH_MATH_SUPPORT
4699 /* c == '=' || c == ':' || c == CTLENDARI */
4704 expdest = stnputs(p, length, expdest);
4705 newloc = expdest - (char *)stackblock();
4706 if (breakall && !inquotes && newloc > startloc) {
4707 recordregion(startloc, newloc, 0);
4718 if (flag & EXP_VARTILDE2) {
4722 flag |= EXP_VARTILDE2;
4727 * sort of a hack - expand tildes in variable
4728 * assignments (after the first '=' and after ':'s).
4737 case CTLENDVAR: /* ??? */
4740 /* "$@" syntax adherence hack */
4743 !memcmp(p, dolatstr, DOLATSTRLEN) &&
4744 (p[4] == CTLQUOTEMARK || (
4745 p[4] == CTLENDVAR &&
4746 p[5] == CTLQUOTEMARK
4749 p = evalvar(p + 1, flag) + 1;
4752 inquotes = !inquotes;
4765 p = evalvar(p, flag);
4769 case CTLBACKQ|CTLQUOTE:
4770 expbackq(argbackq->n, c, quotes);
4771 argbackq = argbackq->next;
4773 #ifdef CONFIG_ASH_MATH_SUPPORT
4786 exptilde(char *startp, char *p, int flag)
4792 int quotes = flag & (EXP_FULL | EXP_CASE);
4797 while ((c = *++p) != '\0') {
4804 if (flag & EXP_VARTILDE)
4814 if (*name == '\0') {
4815 if ((home = lookupvar(homestr)) == NULL)
4818 if ((pw = getpwnam(name)) == NULL)
4825 startloc = expdest - (char *)stackblock();
4826 strtodest(home, SQSYNTAX, quotes);
4827 recordregion(startloc, expdest - (char *)stackblock(), 0);
4836 removerecordregions(int endoff)
4838 if (ifslastp == NULL)
4841 if (ifsfirst.endoff > endoff) {
4842 while (ifsfirst.next != NULL) {
4843 struct ifsregion *ifsp;
4845 ifsp = ifsfirst.next->next;
4846 ckfree(ifsfirst.next);
4847 ifsfirst.next = ifsp;
4850 if (ifsfirst.begoff > endoff)
4853 ifslastp = &ifsfirst;
4854 ifsfirst.endoff = endoff;
4859 ifslastp = &ifsfirst;
4860 while (ifslastp->next && ifslastp->next->begoff < endoff)
4861 ifslastp=ifslastp->next;
4862 while (ifslastp->next != NULL) {
4863 struct ifsregion *ifsp;
4865 ifsp = ifslastp->next->next;
4866 ckfree(ifslastp->next);
4867 ifslastp->next = ifsp;
4870 if (ifslastp->endoff > endoff)
4871 ifslastp->endoff = endoff;
4875 #ifdef CONFIG_ASH_MATH_SUPPORT
4877 * Expand arithmetic expression. Backup to start of expression,
4878 * evaluate, place result in (backed up) result, adjust string position.
4891 * This routine is slightly over-complicated for
4892 * efficiency. Next we scan backwards looking for the
4893 * start of arithmetic.
4895 start = stackblock();
4902 while (*p != CTLARI) {
4906 error("missing CTLARI (shouldn't happen)");
4911 esc = esclen(start, p);
4921 removerecordregions(begoff);
4930 len = cvtnum(dash_arith(p + 2));
4933 recordregion(begoff, begoff + len, 0);
4938 * Expand stuff in backwards quotes.
4942 expbackq(union node *cmd, int quoted, int quotes)
4950 int syntax = quoted? DQSYNTAX : BASESYNTAX;
4951 struct stackmark smark;
4954 setstackmark(&smark);
4956 startloc = dest - (char *)stackblock();
4958 evalbackcmd(cmd, (struct backcmd *) &in);
4959 popstackmark(&smark);
4966 memtodest(p, i, syntax, quotes);
4970 i = safe_read(in.fd, buf, sizeof buf);
4971 TRACE(("expbackq: read returns %d\n", i));
4981 back_exitstatus = waitforjob(in.jp);
4985 /* Eat all trailing newlines */
4987 for (; dest > (char *)stackblock() && dest[-1] == '\n';)
4992 recordregion(startloc, dest - (char *)stackblock(), 0);
4993 TRACE(("evalbackq: size=%d: \"%.*s\"\n",
4994 (dest - (char *)stackblock()) - startloc,
4995 (dest - (char *)stackblock()) - startloc,
4996 stackblock() + startloc));
5001 scanleft(char *startp, char *rmesc, char *rmescend, char *str, int quotes,
5012 const char *s = loc2;
5018 match = pmatch(str, s);
5022 if (quotes && *loc == CTLESC)
5032 scanright(char *startp, char *rmesc, char *rmescend, char *str, int quotes,
5039 for (loc = str - 1, loc2 = rmescend; loc >= startp; loc2--) {
5042 const char *s = loc2;
5047 match = pmatch(str, s);
5054 esc = esclen(startp, loc);
5066 subevalvar(char *p, char *str, int strloc, int subtype, int startloc, int varflags, int quotes)
5070 int saveherefd = herefd;
5071 struct nodelist *saveargbackq = argbackq;
5073 char *rmesc, *rmescend;
5075 char *(*scan)(char *, char *, char *, char *, int , int);
5078 argstr(p, subtype != VSASSIGN && subtype != VSQUESTION ? EXP_CASE : 0);
5079 STPUTC('\0', expdest);
5080 herefd = saveherefd;
5081 argbackq = saveargbackq;
5082 startp = stackblock() + startloc;
5086 setvar(str, startp, 0);
5087 amount = startp - expdest;
5088 STADJUST(amount, expdest);
5092 varunset(p, str, startp, varflags);
5096 subtype -= VSTRIMRIGHT;
5098 if (subtype < 0 || subtype > 3)
5103 rmescend = stackblock() + strloc;
5105 rmesc = _rmescapes(startp, RMESCAPE_ALLOC | RMESCAPE_GROW);
5106 if (rmesc != startp) {
5108 startp = stackblock() + startloc;
5112 str = stackblock() + strloc;
5113 preglob(str, varflags & VSQUOTE, 0);
5115 /* zero = subtype == VSTRIMLEFT || subtype == VSTRIMLEFTMAX */
5116 zero = subtype >> 1;
5117 /* VSTRIMLEFT/VSTRIMRIGHTMAX -> scanleft */
5118 scan = (subtype & 1) ^ zero ? scanleft : scanright;
5120 loc = scan(startp, rmesc, rmescend, str, quotes, zero);
5123 memmove(startp, loc, str - loc);
5124 loc = startp + (str - loc) - 1;
5127 amount = loc - expdest;
5128 STADJUST(amount, expdest);
5135 * Expand a variable, and return a pointer to the next character in the
5139 evalvar(char *p, int flag)
5152 quotes = flag & (EXP_FULL | EXP_CASE);
5154 subtype = varflags & VSTYPE;
5155 quoted = varflags & VSQUOTE;
5157 easy = (!quoted || (*var == '@' && shellparam.nparam));
5158 startloc = expdest - (char *)stackblock();
5159 p = strchr(p, '=') + 1;
5162 varlen = varvalue(var, varflags, flag);
5163 if (varflags & VSNUL)
5166 if (subtype == VSPLUS) {
5167 varlen = -1 - varlen;
5171 if (subtype == VSMINUS) {
5175 p, flag | EXP_TILDE |
5176 (quoted ? EXP_QWORD : EXP_WORD)
5185 if (subtype == VSASSIGN || subtype == VSQUESTION) {
5187 if (subevalvar(p, var, 0, subtype, startloc,
5191 * Remove any recorded regions beyond
5194 removerecordregions(startloc);
5204 if (varlen < 0 && uflag)
5205 varunset(p, var, 0, 0);
5207 if (subtype == VSLENGTH) {
5208 cvtnum(varlen > 0 ? varlen : 0);
5212 if (subtype == VSNORMAL) {
5216 recordregion(startloc, expdest - (char *)stackblock(), quoted);
5225 case VSTRIMRIGHTMAX:
5234 * Terminate the string and start recording the pattern
5237 STPUTC('\0', expdest);
5238 patloc = expdest - (char *)stackblock();
5239 if (subevalvar(p, NULL, patloc, subtype,
5240 startloc, varflags, quotes) == 0) {
5241 int amount = expdest - (
5242 (char *)stackblock() + patloc - 1
5244 STADJUST(-amount, expdest);
5246 /* Remove any recorded regions beyond start of variable */
5247 removerecordregions(startloc);
5252 if (subtype != VSNORMAL) { /* skip to end of alternative */
5255 if ((c = *p++) == CTLESC)
5257 else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) {
5259 argbackq = argbackq->next;
5260 } else if (c == CTLVAR) {
5261 if ((*p++ & VSTYPE) != VSNORMAL)
5263 } else if (c == CTLENDVAR) {
5274 * Put a string on the stack.
5278 memtodest(const char *p, size_t len, int syntax, int quotes) {
5281 q = makestrspace(len * 2, q);
5287 if (quotes && (SIT(c, syntax) == CCTL || SIT(c, syntax) == CBACK))
5297 strtodest(const char *p, int syntax, int quotes)
5299 memtodest(p, strlen(p), syntax, quotes);
5304 * Add the value of a specialized variable to the stack string.
5308 varvalue(char *name, int varflags, int flags)
5318 int quoted = varflags & VSQUOTE;
5319 int subtype = varflags & VSTYPE;
5320 int quotes = flags & (EXP_FULL | EXP_CASE);
5322 if (quoted && (flags & EXP_FULL))
5323 sep = 1 << CHAR_BIT;
5325 syntax = quoted ? DQSYNTAX : BASESYNTAX;
5334 num = shellparam.nparam;
5344 p = makestrspace(NOPTS, expdest);
5345 for (i = NOPTS - 1; i >= 0; i--) {
5347 USTPUTC(optletters(i), p);
5358 sep = ifsset() ? ifsval()[0] : ' ';
5359 if (quotes && (SIT(sep, syntax) == CCTL || SIT(sep, syntax) == CBACK))
5362 if (!(ap = shellparam.p))
5364 while ((p = *ap++)) {
5367 partlen = strlen(p);
5370 if (len > partlen && sep) {
5374 if (subtype == VSPLUS || subtype == VSLENGTH) {
5384 if (!(subtype == VSPLUS || subtype == VSLENGTH))
5385 memtodest(p, partlen, syntax, quotes);
5399 if (num < 0 || num > shellparam.nparam)
5401 p = num ? shellparam.p[num - 1] : arg0;
5404 p = lookupvar(name);
5410 if (!(subtype == VSPLUS || subtype == VSLENGTH))
5411 memtodest(p, len, syntax, quotes);
5415 if (subtype == VSPLUS || subtype == VSLENGTH)
5416 STADJUST(-len, expdest);
5422 * Record the fact that we have to scan this region of the
5423 * string for IFS characters.
5427 recordregion(int start, int end, int nulonly)
5429 struct ifsregion *ifsp;
5431 if (ifslastp == NULL) {
5435 ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion));
5437 ifslastp->next = ifsp;
5441 ifslastp->begoff = start;
5442 ifslastp->endoff = end;
5443 ifslastp->nulonly = nulonly;
5448 * Break the argument string into pieces based upon IFS and add the
5449 * strings to the argument list. The regions of the string to be
5450 * searched for IFS characters have been stored by recordregion.
5453 ifsbreakup(char *string, struct arglist *arglist)
5455 struct ifsregion *ifsp;
5460 const char *ifs, *realifs;
5466 if (ifslastp != NULL) {
5469 realifs = ifsset() ? ifsval() : defifs;
5472 p = string + ifsp->begoff;
5473 nulonly = ifsp->nulonly;
5474 ifs = nulonly ? nullstr : realifs;
5476 while (p < string + ifsp->endoff) {
5480 if (strchr(ifs, *p)) {
5482 ifsspc = (strchr(defifs, *p) != NULL);
5483 /* Ignore IFS whitespace at start */
5484 if (q == start && ifsspc) {
5490 sp = (struct strlist *)stalloc(sizeof *sp);
5492 *arglist->lastp = sp;
5493 arglist->lastp = &sp->next;
5497 if (p >= string + ifsp->endoff) {
5503 if (strchr(ifs, *p) == NULL ) {
5506 } else if (strchr(defifs, *p) == NULL) {
5522 } while ((ifsp = ifsp->next) != NULL);
5531 sp = (struct strlist *)stalloc(sizeof *sp);
5533 *arglist->lastp = sp;
5534 arglist->lastp = &sp->next;
5540 struct ifsregion *p;
5545 struct ifsregion *ifsp;
5551 ifsfirst.next = NULL;
5555 static void expmeta(char *, char *);
5556 static struct strlist *expsort(struct strlist *);
5557 static struct strlist *msort(struct strlist *, int);
5559 static char *expdir;
5563 expandmeta(struct strlist *str, int flag)
5565 static const char metachars[] = {
5568 /* TODO - EXP_REDIR */
5571 struct strlist **savelastp;
5577 if (!strpbrk(str->text, metachars))
5579 savelastp = exparg.lastp;
5582 p = preglob(str->text, 0, RMESCAPE_ALLOC | RMESCAPE_HEAP);
5584 int i = strlen(str->text);
5585 expdir = ckmalloc(i < 2048 ? 2048 : i); /* XXX */
5593 if (exparg.lastp == savelastp) {
5598 *exparg.lastp = str;
5599 rmescapes(str->text);
5600 exparg.lastp = &str->next;
5602 *exparg.lastp = NULL;
5603 *savelastp = sp = expsort(*savelastp);
5604 while (sp->next != NULL)
5606 exparg.lastp = &sp->next;
5613 * Add a file name to the list.
5617 addfname(const char *name)
5621 sp = (struct strlist *)stalloc(sizeof *sp);
5622 sp->text = sstrdup(name);
5624 exparg.lastp = &sp->next;
5629 * Do metacharacter (i.e. *, ?, [...]) expansion.
5633 expmeta(char *enddir, char *name)
5648 for (p = name; *p; p++) {
5649 if (*p == '*' || *p == '?')
5651 else if (*p == '[') {
5658 if (*q == '/' || *q == '\0')
5665 } else if (*p == '\\')
5667 else if (*p == '/') {
5674 if (metaflag == 0) { /* we've reached the end of the file name */
5675 if (enddir != expdir)
5683 if (metaflag == 0 || lstat(expdir, &statb) >= 0)
5694 } while (p < start);
5696 if (enddir == expdir) {
5698 } else if (enddir == expdir + 1 && *expdir == '/') {
5704 if ((dirp = opendir(cp)) == NULL)
5706 if (enddir != expdir)
5708 if (*endname == 0) {
5720 while (! intpending && (dp = readdir(dirp)) != NULL) {
5721 if (dp->d_name[0] == '.' && ! matchdot)
5723 if (pmatch(start, dp->d_name)) {
5725 scopy(dp->d_name, enddir);
5728 for (p = enddir, cp = dp->d_name;
5729 (*p++ = *cp++) != '\0';)
5732 expmeta(p, endname);
5742 * Sort the results of file name expansion. It calculates the number of
5743 * strings to sort and then calls msort (short for merge sort) to do the
5747 static struct strlist *
5748 expsort(struct strlist *str)
5754 for (sp = str ; sp ; sp = sp->next)
5756 return msort(str, len);
5760 static struct strlist *
5761 msort(struct strlist *list, int len)
5763 struct strlist *p, *q = NULL;
5764 struct strlist **lpp;
5772 for (n = half ; --n >= 0 ; ) {
5776 q->next = NULL; /* terminate first half of list */
5777 q = msort(list, half); /* sort first half of list */
5778 p = msort(p, len - half); /* sort second half */
5781 #ifdef CONFIG_LOCALE_SUPPORT
5782 if (strcoll(p->text, q->text) < 0)
5784 if (strcmp(p->text, q->text) < 0)
5789 if ((p = *lpp) == NULL) {
5796 if ((q = *lpp) == NULL) {
5807 * Returns true if the pattern matches the string.
5811 patmatch(char *pattern, const char *string)
5813 return pmatch(preglob(pattern, 0, 0), string);
5818 * Remove any CTLESC characters from a string.
5822 _rmescapes(char *str, int flag)
5825 static const char qchars[] = { CTLESC, CTLQUOTEMARK, 0 };
5830 p = strpbrk(str, qchars);
5836 if (flag & RMESCAPE_ALLOC) {
5837 size_t len = p - str;
5838 size_t fulllen = len + strlen(p) + 1;
5840 if (flag & RMESCAPE_GROW) {
5841 r = makestrspace(fulllen, expdest);
5842 } else if (flag & RMESCAPE_HEAP) {
5843 r = ckmalloc(fulllen);
5845 r = stalloc(fulllen);
5849 q = mempcpy(q, str, len);
5852 inquotes = (flag & RMESCAPE_QUOTED) ^ RMESCAPE_QUOTED;
5853 globbing = flag & RMESCAPE_GLOB;
5854 notescaped = globbing;
5856 if (*p == CTLQUOTEMARK) {
5857 inquotes = ~inquotes;
5859 notescaped = globbing;
5863 /* naked back slash */
5869 if (notescaped && inquotes && *p != '/') {
5873 notescaped = globbing;
5878 if (flag & RMESCAPE_GROW) {
5880 STADJUST(q - r + 1, expdest);
5887 * See if a pattern matches in a case statement.
5891 casematch(union node *pattern, char *val)
5893 struct stackmark smark;
5896 setstackmark(&smark);
5897 argbackq = pattern->narg.backquote;
5898 STARTSTACKSTR(expdest);
5900 argstr(pattern->narg.text, EXP_TILDE | EXP_CASE);
5901 STACKSTRNUL(expdest);
5902 result = patmatch(stackblock(), val);
5903 popstackmark(&smark);
5916 expdest = makestrspace(32, expdest);
5917 #ifdef CONFIG_ASH_MATH_SUPPORT_64
5918 len = fmtstr(expdest, 32, "%lld", (long long) num);
5920 len = fmtstr(expdest, 32, "%ld", num);
5922 STADJUST(len, expdest);
5927 varunset(const char *end, const char *var, const char *umsg, int varflags)
5933 msg = "parameter not set";
5935 if (*end == CTLENDVAR) {
5936 if (varflags & VSNUL)
5941 error("%.*s: %s%s", end - var - 1, var, msg, tail);
5945 /* $NetBSD: input.c,v 1.37 2002/11/24 22:35:40 christos Exp $ */
5948 * This implements the input routines used by the parser.
5951 #define EOF_NLEFT -99 /* value of parsenleft when EOF pushed back */
5952 #define IBUFSIZ (BUFSIZ + 1)
5954 static void pushfile(void);
5957 * Read a line from the script.
5960 static inline char *
5961 pfgets(char *line, int len)
5967 while (--nleft > 0) {
5984 * Read a character from the script, returning PEOF on end of file.
5985 * Nul characters in the input are silently discarded.
5988 #define pgetc_as_macro() (--parsenleft >= 0? *parsenextc++ : preadbuffer())
5990 #ifdef CONFIG_ASH_OPTIMIZE_FOR_SIZE
5991 #define pgetc_macro() pgetc()
5995 return pgetc_as_macro();
5998 #define pgetc_macro() pgetc_as_macro()
6002 return pgetc_macro();
6008 * Same as pgetc(), but ignores PEOA.
6010 #ifdef CONFIG_ASH_ALIAS
6011 static int pgetc2(void)
6017 } while (c == PEOA);
6021 static inline int pgetc2(void)
6023 return pgetc_macro();
6028 #ifdef CONFIG_FEATURE_COMMAND_EDITING
6029 static const char *cmdedit_prompt;
6030 static inline void putprompt(const char *s)
6035 static inline void putprompt(const char *s)
6045 char *buf = parsefile->buf;
6049 #ifdef CONFIG_FEATURE_COMMAND_EDITING
6050 if (!iflag || parsefile->fd)
6051 nr = safe_read(parsefile->fd, buf, BUFSIZ - 1);
6053 cmdedit_path_lookup = pathval();
6054 nr = cmdedit_read_input((char *) cmdedit_prompt, buf);
6056 /* Ctrl+C presend */
6066 /* Ctrl+D presend */
6071 nr = safe_read(parsefile->fd, buf, BUFSIZ - 1);
6075 if (parsefile->fd == 0 && errno == EWOULDBLOCK) {
6076 int flags = fcntl(0, F_GETFL, 0);
6077 if (flags >= 0 && flags & O_NONBLOCK) {
6078 flags &=~ O_NONBLOCK;
6079 if (fcntl(0, F_SETFL, flags) >= 0) {
6080 out2str("sh: turning off NDELAY mode\n");
6090 * Refill the input buffer and return the next input character:
6092 * 1) If a string was pushed back on the input, pop it;
6093 * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading
6094 * from a string so we can't refill the buffer, return EOF.
6095 * 3) If the is more stuff in this buffer, use it else call read to fill it.
6096 * 4) Process input up to the next newline, deleting nul characters.
6106 while (parsefile->strpush) {
6107 #ifdef CONFIG_ASH_ALIAS
6108 if (parsenleft == -1 && parsefile->strpush->ap &&
6109 parsenextc[-1] != ' ' && parsenextc[-1] != '\t') {
6114 if (--parsenleft >= 0)
6115 return (*parsenextc++);
6117 if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
6122 if (parselleft <= 0) {
6123 if ((parselleft = preadfd()) <= 0) {
6124 parselleft = parsenleft = EOF_NLEFT;
6131 /* delete nul characters */
6132 for (more = 1; more;) {
6139 parsenleft = q - parsenextc;
6140 more = 0; /* Stop processing here */
6147 if (--parselleft <= 0 && more) {
6148 parsenleft = q - parsenextc - 1;
6159 out2str(parsenextc);
6164 return *parsenextc++;
6168 * Undo the last call to pgetc. Only one character may be pushed back.
6169 * PEOF may be pushed back.
6180 * Push a string back onto the input at this current parsefile level.
6181 * We handle aliases this way.
6184 pushstring(char *s, void *ap)
6191 /*dprintf("*** calling pushstring: %s, %d\n", s, len);*/
6192 if (parsefile->strpush) {
6193 sp = ckmalloc(sizeof (struct strpush));
6194 sp->prev = parsefile->strpush;
6195 parsefile->strpush = sp;
6197 sp = parsefile->strpush = &(parsefile->basestrpush);
6198 sp->prevstring = parsenextc;
6199 sp->prevnleft = parsenleft;
6200 #ifdef CONFIG_ASH_ALIAS
6201 sp->ap = (struct alias *)ap;
6203 ((struct alias *)ap)->flag |= ALIASINUSE;
6215 struct strpush *sp = parsefile->strpush;
6218 #ifdef CONFIG_ASH_ALIAS
6220 if (parsenextc[-1] == ' ' || parsenextc[-1] == '\t') {
6221 checkkwd |= CHKALIAS;
6223 if (sp->string != sp->ap->val) {
6226 sp->ap->flag &= ~ALIASINUSE;
6227 if (sp->ap->flag & ALIASDEAD) {
6228 unalias(sp->ap->name);
6232 parsenextc = sp->prevstring;
6233 parsenleft = sp->prevnleft;
6234 /*dprintf("*** calling popstring: restoring to '%s'\n", parsenextc);*/
6235 parsefile->strpush = sp->prev;
6236 if (sp != &(parsefile->basestrpush))
6242 * Set the input to take input from a file. If push is set, push the
6243 * old input onto the stack first.
6247 setinputfile(const char *fname, int push)
6253 if ((fd = open(fname, O_RDONLY)) < 0)
6254 error("Can't open %s", fname);
6256 fd2 = copyfd(fd, 10);
6259 error("Out of file descriptors");
6262 setinputfd(fd, push);
6268 * Like setinputfile, but takes an open file descriptor. Call this with
6273 setinputfd(int fd, int push)
6275 (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
6281 if (parsefile->buf == NULL)
6282 parsefile->buf = ckmalloc(IBUFSIZ);
6283 parselleft = parsenleft = 0;
6289 * Like setinputfile, but takes input from a string.
6293 setinputstring(char *string)
6297 parsenextc = string;
6298 parsenleft = strlen(string);
6299 parsefile->buf = NULL;
6306 * To handle the "." command, a stack of input files is used. Pushfile
6307 * adds a new entry to the stack and popfile restores the previous level.
6313 struct parsefile *pf;
6315 parsefile->nleft = parsenleft;
6316 parsefile->lleft = parselleft;
6317 parsefile->nextc = parsenextc;
6318 parsefile->linno = plinno;
6319 pf = (struct parsefile *)ckmalloc(sizeof (struct parsefile));
6320 pf->prev = parsefile;
6323 pf->basestrpush.prev = NULL;
6331 struct parsefile *pf = parsefile;
6340 parsefile = pf->prev;
6342 parsenleft = parsefile->nleft;
6343 parselleft = parsefile->lleft;
6344 parsenextc = parsefile->nextc;
6345 plinno = parsefile->linno;
6351 * Return to top level.
6357 while (parsefile != &basepf)
6363 * Close the file(s) that the shell is reading commands from. Called
6364 * after a fork is done.
6371 if (parsefile->fd > 0) {
6372 close(parsefile->fd);
6377 /* $NetBSD: jobs.c,v 1.56 2002/11/25 12:13:03 agc Exp $ */
6379 /* mode flags for set_curjob */
6380 #define CUR_DELETE 2
6381 #define CUR_RUNNING 1
6382 #define CUR_STOPPED 0
6384 /* mode flags for dowait */
6385 #define DOWAIT_NORMAL 0
6386 #define DOWAIT_BLOCK 1
6389 static struct job *jobtab;
6391 static unsigned njobs;
6393 /* pgrp of shell on invocation */
6394 static int initialpgrp;
6395 static int ttyfd = -1;
6398 static struct job *curjob;
6399 /* number of presumed living untracked jobs */
6402 static void set_curjob(struct job *, unsigned);
6404 static int restartjob(struct job *, int);
6405 static void xtcsetpgrp(int, pid_t);
6406 static char *commandtext(union node *);
6407 static void cmdlist(union node *, int);
6408 static void cmdtxt(union node *);
6409 static void cmdputs(const char *);
6410 static void showpipe(struct job *, FILE *);
6412 static int sprint_status(char *, int, int);
6413 static void freejob(struct job *);
6414 static struct job *getjob(const char *, int);
6415 static struct job *growjobtab(void);
6416 static void forkchild(struct job *, union node *, int);
6417 static void forkparent(struct job *, union node *, int, pid_t);
6418 static int dowait(int, struct job *);
6419 static int getstatus(struct job *);
6422 set_curjob(struct job *jp, unsigned mode)
6425 struct job **jpp, **curp;
6427 /* first remove from list */
6428 jpp = curp = &curjob;
6433 jpp = &jp1->prev_job;
6435 *jpp = jp1->prev_job;
6437 /* Then re-insert in correct position */
6445 /* job being deleted */
6448 /* newly created job or backgrounded job,
6449 put after all stopped jobs. */
6453 if (!jp1 || jp1->state != JOBSTOPPED)
6456 jpp = &jp1->prev_job;
6462 /* newly stopped job - becomes curjob */
6463 jp->prev_job = *jpp;
6471 * Turn job control on and off.
6473 * Note: This code assumes that the third arg to ioctl is a character
6474 * pointer, which is true on Berkeley systems but not System V. Since
6475 * System V doesn't have job control yet, this isn't a problem now.
6477 * Called with interrupts off.
6486 if (on == jobctl || rootshell == 0)
6490 ofd = fd = open(_PATH_TTY, O_RDWR);
6493 while (!isatty(fd) && --fd >= 0)
6496 fd = fcntl(fd, F_DUPFD, 10);
6500 fcntl(fd, F_SETFD, FD_CLOEXEC);
6501 do { /* while we are in the background */
6502 if ((pgrp = tcgetpgrp(fd)) < 0) {
6504 sh_warnx("can't access tty; job control turned off");
6508 if (pgrp == getpgrp())
6519 xtcsetpgrp(fd, pgrp);
6521 /* turning job control off */
6524 xtcsetpgrp(fd, pgrp);
6538 killcmd(int argc, char **argv)
6549 "Usage: kill [-s sigspec | -signum | -sigspec] [pid | job]... or\n"
6550 "kill -l [exitstatus]"
6554 if (**++argv == '-') {
6555 signo = decode_signal(*argv + 1, 1);
6559 while ((c = nextopt("ls:")) != '\0')
6569 signo = decode_signal(optionarg, 1);
6572 "invalid signal number or name: %s",
6583 if (!list && signo < 0)
6586 if ((signo < 0 || !*argv) ^ list) {
6594 for (i = 1; i < NSIG; i++) {
6595 name = u_signal_names(0, &i, 1);
6597 out1fmt(snlfmt, name);
6601 name = u_signal_names(*argptr, &signo, -1);
6603 out1fmt(snlfmt, name);
6605 error("invalid signal number or exit status: %s", *argptr);
6611 if (**argv == '%') {
6612 jp = getjob(*argv, 0);
6613 pid = -jp->ps[0].pid;
6615 pid = number(*argv);
6616 if (kill(pid, signo) != 0) {
6626 #if defined(JOBS) || defined(DEBUG)
6628 jobno(const struct job *jp)
6630 return jp - jobtab + 1;
6636 fgcmd(int argc, char **argv)
6643 mode = (**argv == 'f') ? FORK_FG : FORK_BG;
6648 jp = getjob(*argv, 1);
6649 if (mode == FORK_BG) {
6650 set_curjob(jp, CUR_RUNNING);
6651 fprintf(out, "[%d] ", jobno(jp));
6653 outstr(jp->ps->cmd, out);
6655 retval = restartjob(jp, mode);
6656 } while (*argv && *++argv);
6660 static int bgcmd(int, char **) __attribute__((__alias__("fgcmd")));
6664 restartjob(struct job *jp, int mode)
6666 struct procstat *ps;
6672 if (jp->state == JOBDONE)
6674 jp->state = JOBRUNNING;
6676 if (mode == FORK_FG)
6677 xtcsetpgrp(ttyfd, pgid);
6678 killpg(pgid, SIGCONT);
6682 if (WIFSTOPPED(ps->status)) {
6685 } while (ps++, --i);
6687 status = (mode == FORK_FG) ? waitforjob(jp) : 0;
6694 sprint_status(char *s, int status, int sigonly)
6700 if (!WIFEXITED(status)) {
6702 if (WIFSTOPPED(status))
6703 st = WSTOPSIG(status);
6706 st = WTERMSIG(status);
6708 if (st == SIGINT || st == SIGPIPE)
6711 if (WIFSTOPPED(status))
6716 col = fmtstr(s, 32, strsignal(st));
6717 if (WCOREDUMP(status)) {
6718 col += fmtstr(s + col, 16, " (core dumped)");
6720 } else if (!sigonly) {
6721 st = WEXITSTATUS(status);
6723 col = fmtstr(s, 16, "Done(%d)", st);
6725 col = fmtstr(s, 16, "Done");
6734 showjob(FILE *out, struct job *jp, int mode)
6736 struct procstat *ps;
6737 struct procstat *psend;
6744 if (mode & SHOW_PGID) {
6745 /* just output process (group) id of pipeline */
6746 fprintf(out, "%d\n", ps->pid);
6750 col = fmtstr(s, 16, "[%d] ", jobno(jp));
6755 else if (curjob && jp == curjob->prev_job)
6758 if (mode & SHOW_PID)
6759 col += fmtstr(s + col, 16, "%d ", ps->pid);
6761 psend = ps + jp->nprocs;
6763 if (jp->state == JOBRUNNING) {
6764 scopy("Running", s + col);
6765 col += strlen("Running");
6767 int status = psend[-1].status;
6769 if (jp->state == JOBSTOPPED)
6770 status = jp->stopstatus;
6772 col += sprint_status(s + col, status, 0);
6778 /* for each process */
6779 col = fmtstr(s, 48, " |\n%*c%d ", indent, ' ', ps->pid) - 3;
6782 fprintf(out, "%s%*c%s",
6783 s, 33 - col >= 0 ? 33 - col : 0, ' ', ps->cmd
6785 if (!(mode & SHOW_PID)) {
6789 if (++ps == psend) {
6790 outcslow('\n', out);
6797 if (jp->state == JOBDONE) {
6798 TRACE(("showjob: freeing job %d\n", jobno(jp)));
6805 jobscmd(int argc, char **argv)
6811 while ((m = nextopt("lp")))
6821 showjob(out, getjob(*argv,0), mode);
6824 showjobs(out, mode);
6831 * Print a list of jobs. If "change" is nonzero, only print jobs whose
6832 * statuses have changed since the last call to showjobs.
6836 showjobs(FILE *out, int mode)
6840 TRACE(("showjobs(%x) called\n", mode));
6842 /* If not even one one job changed, there is nothing to do */
6843 while (dowait(DOWAIT_NORMAL, NULL) > 0)
6846 for (jp = curjob; jp; jp = jp->prev_job) {
6847 if (!(mode & SHOW_CHANGED) || jp->changed)
6848 showjob(out, jp, mode);
6854 * Mark a job structure as unused.
6858 freejob(struct job *jp)
6860 struct procstat *ps;
6864 for (i = jp->nprocs, ps = jp->ps ; --i >= 0 ; ps++) {
6865 if (ps->cmd != nullstr)
6868 if (jp->ps != &jp->ps0)
6871 set_curjob(jp, CUR_DELETE);
6877 waitcmd(int argc, char **argv)
6890 /* wait for all jobs */
6895 /* no running procs */
6898 if (jp->state == JOBRUNNING)
6903 dowait(DOWAIT_BLOCK, 0);
6909 if (**argv != '%') {
6910 pid_t pid = number(*argv);
6914 if (job->ps[job->nprocs - 1].pid == pid)
6916 job = job->prev_job;
6922 job = getjob(*argv, 0);
6923 /* loop until process terminated or stopped */
6924 while (job->state == JOBRUNNING)
6925 dowait(DOWAIT_BLOCK, 0);
6927 retval = getstatus(job);
6938 * Convert a job name to a job structure.
6942 getjob(const char *name, int getctl)
6946 const char *err_msg = "No such job: %s";
6950 char *(*match)(const char *, const char *);
6965 if (c == '+' || c == '%') {
6967 err_msg = "No current job";
6969 } else if (c == '-') {
6972 err_msg = "No previous job";
6983 jp = jobtab + num - 1;
7000 if (match(jp->ps[0].cmd, p)) {
7004 err_msg = "%s: ambiguous";
7011 err_msg = "job %s not created under job control";
7012 if (getctl && jp->jobctl == 0)
7017 error(err_msg, name);
7022 * Return a new job structure.
7023 * Called with interrupts off.
7027 makejob(union node *node, int nprocs)
7032 for (i = njobs, jp = jobtab ; ; jp++) {
7039 if (jp->state != JOBDONE || !jp->waited)
7048 memset(jp, 0, sizeof(*jp));
7053 jp->prev_job = curjob;
7058 jp->ps = ckmalloc(nprocs * sizeof (struct procstat));
7060 TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs,
7070 struct job *jp, *jq;
7072 len = njobs * sizeof(*jp);
7074 jp = ckrealloc(jq, len + 4 * sizeof(*jp));
7076 offset = (char *)jp - (char *)jq;
7078 /* Relocate pointers */
7081 jq = (struct job *)((char *)jq + l);
7085 #define joff(p) ((struct job *)((char *)(p) + l))
7086 #define jmove(p) (p) = (void *)((char *)(p) + offset)
7087 if (likely(joff(jp)->ps == &jq->ps0))
7088 jmove(joff(jp)->ps);
7089 if (joff(jp)->prev_job)
7090 jmove(joff(jp)->prev_job);
7100 jp = (struct job *)((char *)jp + len);
7104 } while (--jq >= jp);
7110 * Fork off a subshell. If we are doing job control, give the subshell its
7111 * own process group. Jp is a job structure that the job is to be added to.
7112 * N is the command that will be evaluated by the child. Both jp and n may
7113 * be NULL. The mode parameter can be one of the following:
7114 * FORK_FG - Fork off a foreground process.
7115 * FORK_BG - Fork off a background process.
7116 * FORK_NOJOB - Like FORK_FG, but don't give the process its own
7117 * process group even if job control is on.
7119 * When job control is turned off, background processes have their standard
7120 * input redirected to /dev/null (except for the second and later processes
7123 * Called with interrupts off.
7127 forkchild(struct job *jp, union node *n, int mode)
7131 TRACE(("Child shell %d\n", getpid()));
7132 wasroot = rootshell;
7138 /* do job control only in root shell */
7140 if (mode != FORK_NOJOB && jp->jobctl && wasroot) {
7143 if (jp->nprocs == 0)
7146 pgrp = jp->ps[0].pid;
7147 /* This can fail because we are doing it in the parent also */
7148 (void)setpgid(0, pgrp);
7149 if (mode == FORK_FG)
7150 xtcsetpgrp(ttyfd, pgrp);
7155 if (mode == FORK_BG) {
7158 if (jp->nprocs == 0) {
7160 if (open(_PATH_DEVNULL, O_RDONLY) != 0)
7161 error("Can't open %s", _PATH_DEVNULL);
7164 if (wasroot && iflag) {
7169 for (jp = curjob; jp; jp = jp->prev_job)
7175 forkparent(struct job *jp, union node *n, int mode, pid_t pid)
7177 TRACE(("In parent shell: child = %d\n", pid));
7179 while (jobless && dowait(DOWAIT_NORMAL, 0) > 0);
7184 if (mode != FORK_NOJOB && jp->jobctl) {
7187 if (jp->nprocs == 0)
7190 pgrp = jp->ps[0].pid;
7191 /* This can fail because we are doing it in the child also */
7192 (void)setpgid(pid, pgrp);
7195 if (mode == FORK_BG) {
7196 backgndpid = pid; /* set $! */
7197 set_curjob(jp, CUR_RUNNING);
7200 struct procstat *ps = &jp->ps[jp->nprocs++];
7206 ps->cmd = commandtext(n);
7212 forkshell(struct job *jp, union node *n, int mode)
7216 TRACE(("forkshell(%%%d, %p, %d) called\n", jobno(jp), n, mode));
7219 TRACE(("Fork failed, errno=%d", errno));
7222 error("Cannot fork");
7225 forkchild(jp, n, mode);
7227 forkparent(jp, n, mode, pid);
7232 * Wait for job to finish.
7234 * Under job control we have the problem that while a child process is
7235 * running interrupts generated by the user are sent to the child but not
7236 * to the shell. This means that an infinite loop started by an inter-
7237 * active user may be hard to kill. With job control turned off, an
7238 * interactive user may place an interactive program inside a loop. If
7239 * the interactive program catches interrupts, the user doesn't want
7240 * these interrupts to also abort the loop. The approach we take here
7241 * is to have the shell ignore interrupt signals while waiting for a
7242 * foreground process to terminate, and then send itself an interrupt
7243 * signal if the child process was terminated by an interrupt signal.
7244 * Unfortunately, some programs want to do a bit of cleanup and then
7245 * exit on interrupt; unless these processes terminate themselves by
7246 * sending a signal to themselves (instead of calling exit) they will
7247 * confuse this approach.
7249 * Called with interrupts off.
7253 waitforjob(struct job *jp)
7257 TRACE(("waitforjob(%%%d) called\n", jobno(jp)));
7258 while (jp->state == JOBRUNNING) {
7259 dowait(DOWAIT_BLOCK, jp);
7264 xtcsetpgrp(ttyfd, rootpid);
7266 * This is truly gross.
7267 * If we're doing job control, then we did a TIOCSPGRP which
7268 * caused us (the shell) to no longer be in the controlling
7269 * session -- so we wouldn't have seen any ^C/SIGINT. So, we
7270 * intuit from the subprocess exit status whether a SIGINT
7271 * occurred, and if so interrupt ourselves. Yuck. - mycroft
7276 if (jp->state == JOBDONE)
7284 * Do a wait system call. If job control is compiled in, we accept
7285 * stopped processes. If block is zero, we return a value of zero
7286 * rather than blocking.
7288 * System V doesn't have a non-blocking wait system call. It does
7289 * have a SIGCLD signal that is sent to a process when one of it's
7290 * children dies. The obvious way to use SIGCLD would be to install
7291 * a handler for SIGCLD which simply bumped a counter when a SIGCLD
7292 * was received, and have waitproc bump another counter when it got
7293 * the status of a process. Waitproc would then know that a wait
7294 * system call would not block if the two counters were different.
7295 * This approach doesn't work because if a process has children that
7296 * have not been waited for, System V will send it a SIGCLD when it
7297 * installs a signal handler for SIGCLD. What this means is that when
7298 * a child exits, the shell will be sent SIGCLD signals continuously
7299 * until is runs out of stack space, unless it does a wait call before
7300 * restoring the signal handler. The code below takes advantage of
7301 * this (mis)feature by installing a signal handler for SIGCLD and
7302 * then checking to see whether it was called. If there are any
7303 * children to be waited for, it will be.
7305 * If neither SYSV nor BSD is defined, we don't implement nonblocking
7306 * waits at all. In this case, the user will not be informed when
7307 * a background process until the next time she runs a real program
7308 * (as opposed to running a builtin command or just typing return),
7309 * and the jobs command may give out of date information.
7313 waitproc(int block, int *status)
7323 return wait3(status, flags, (struct rusage *)NULL);
7327 * Wait for a process to terminate.
7331 dowait(int block, struct job *job)
7336 struct job *thisjob;
7339 TRACE(("dowait(%d) called\n", block));
7340 pid = waitproc(block, &status);
7341 TRACE(("wait returns pid %d, status=%d\n", pid, status));
7346 for (jp = curjob; jp; jp = jp->prev_job) {
7347 struct procstat *sp;
7348 struct procstat *spend;
7349 if (jp->state == JOBDONE)
7352 spend = jp->ps + jp->nprocs;
7355 if (sp->pid == pid) {
7356 TRACE(("Job %d: changing status of proc %d from 0x%x to 0x%x\n", jobno(jp), pid, sp->status, status));
7357 sp->status = status;
7360 if (sp->status == -1)
7363 if (state == JOBRUNNING)
7365 if (WIFSTOPPED(sp->status)) {
7366 jp->stopstatus = sp->status;
7370 } while (++sp < spend);
7375 if (!WIFSTOPPED(status))
7382 if (state != JOBRUNNING) {
7383 thisjob->changed = 1;
7385 if (thisjob->state != state) {
7386 TRACE(("Job %d: changing state from %d to %d\n", jobno(thisjob), thisjob->state, state));
7387 thisjob->state = state;
7389 if (state == JOBSTOPPED) {
7390 set_curjob(thisjob, CUR_STOPPED);
7399 if (thisjob && thisjob == job) {
7403 len = sprint_status(s, status, 1);
7415 * return 1 if there are stopped jobs, otherwise 0
7428 if (jp && jp->state == JOBSTOPPED) {
7429 out2str("You have stopped jobs.\n");
7439 * Return a string identifying a command (to be printed by the
7444 static char *cmdnextc;
7447 commandtext(union node *n)
7451 STARTSTACKSTR(cmdnextc);
7453 name = stackblock();
7454 TRACE(("commandtext: name %p, end %p\n\t\"%s\"\n",
7455 name, cmdnextc, cmdnextc));
7456 return savestr(name);
7460 cmdtxt(union node *n)
7463 struct nodelist *lp;
7475 lp = n->npipe.cmdlist;
7493 cmdtxt(n->nbinary.ch1);
7509 cmdtxt(n->nif.test);
7512 if (n->nif.elsepart) {
7515 n = n->nif.elsepart;
7531 cmdtxt(n->nbinary.ch1);
7541 cmdputs(n->nfor.var);
7543 cmdlist(n->nfor.args, 1);
7548 cmdputs(n->narg.text);
7552 cmdlist(n->ncmd.args, 1);
7553 cmdlist(n->ncmd.redirect, 0);
7566 cmdputs(n->ncase.expr->narg.text);
7568 for (np = n->ncase.cases; np; np = np->nclist.next) {
7569 cmdtxt(np->nclist.pattern);
7571 cmdtxt(np->nclist.body);
7597 s[0] = n->nfile.fd + '0';
7601 if (n->type == NTOFD || n->type == NFROMFD) {
7602 s[0] = n->ndup.dupfd + '0';
7613 cmdlist(union node *np, int sep)
7615 for (; np; np = np->narg.next) {
7619 if (sep && np->narg.next)
7625 cmdputs(const char *s)
7627 const char *p, *str;
7628 char c, cc[2] = " ";
7632 static const char *const vstype[16] = {
7633 nullstr, "}", "-", "+", "?", "=",
7634 "%", "%%", "#", "##", nullstr
7637 nextc = makestrspace((strlen(s) + 1) * 8, cmdnextc);
7639 while ((c = *p++) != 0) {
7647 if ((subtype & VSTYPE) == VSLENGTH)
7651 if (!(subtype & VSQUOTE) != !(quoted & 1)) {
7669 case CTLBACKQ+CTLQUOTE:
7672 #ifdef CONFIG_ASH_MATH_SUPPORT
7687 str = vstype[subtype & VSTYPE];
7688 if (subtype & VSNUL)
7699 /* These can only happen inside quotes */
7711 while ((c = *str++)) {
7716 USTPUTC('"', nextc);
7724 showpipe(struct job *jp, FILE *out)
7726 struct procstat *sp;
7727 struct procstat *spend;
7729 spend = jp->ps + jp->nprocs;
7730 for (sp = jp->ps + 1; sp < spend; sp++)
7731 fprintf(out, " | %s", sp->cmd);
7732 outcslow('\n', out);
7737 xtcsetpgrp(int fd, pid_t pgrp)
7739 if (tcsetpgrp(fd, pgrp))
7740 error("Cannot set tty process group (%m)");
7745 getstatus(struct job *job) {
7749 status = job->ps[job->nprocs - 1].status;
7750 retval = WEXITSTATUS(status);
7751 if (!WIFEXITED(status)) {
7753 retval = WSTOPSIG(status);
7754 if (!WIFSTOPPED(status))
7757 /* XXX: limits number of signals */
7758 retval = WTERMSIG(status);
7760 if (retval == SIGINT)
7766 TRACE(("getstatus: job %d, nproc %d, status %x, retval %x\n",
7767 jobno(job), job->nprocs, status, retval));
7771 #ifdef CONFIG_ASH_MAIL
7772 /* $NetBSD: mail.c,v 1.15 2002/11/24 22:35:40 christos Exp $ */
7775 * Routines to check for mail. (Perhaps make part of main.c?)
7778 #define MAXMBOXES 10
7780 /* times of mailboxes */
7781 static time_t mailtime[MAXMBOXES];
7782 /* Set if MAIL or MAILPATH is changed. */
7783 static int mail_var_path_changed;
7788 * Print appropriate message(s) if mail has arrived.
7789 * If mail_var_path_changed is set,
7790 * then the value of MAIL has mail_var_path_changed,
7791 * so we just update the values.
7801 struct stackmark smark;
7804 setstackmark(&smark);
7805 mpath = mpathset() ? mpathval() : mailval();
7806 for (mtp = mailtime; mtp < mailtime + MAXMBOXES; mtp++) {
7807 p = padvance(&mpath, nullstr);
7812 for (q = p ; *q ; q++);
7817 q[-1] = '\0'; /* delete trailing '/' */
7818 if (stat(p, &statb) < 0) {
7822 if (!mail_var_path_changed && statb.st_mtime != *mtp) {
7825 pathopt ? pathopt : "you have mail"
7828 *mtp = statb.st_mtime;
7830 mail_var_path_changed = 0;
7831 popstackmark(&smark);
7836 changemail(const char *val)
7838 mail_var_path_changed++;
7841 #endif /* CONFIG_ASH_MAIL */
7843 /* $NetBSD: main.c,v 1.46 2002/12/11 19:12:18 christos Exp $ */
7847 static short profile_buf[16384];
7851 static int isloginsh;
7853 static void read_profile(const char *);
7856 * Main routine. We initialize things, parse the arguments, execute
7857 * profiles if we're a login shell, and then call cmdloop to execute
7858 * commands. The setjmp call sets up the location to jump to when an
7859 * exception occurs. When an exception occurs the variable "state"
7860 * is used to figure out how far we had gotten.
7864 ash_main(int argc, char **argv)
7868 struct jmploc jmploc;
7869 struct stackmark smark;
7872 dash_errno = __errno_location();
7876 monitor(4, etext, profile_buf, sizeof profile_buf, 50);
7879 if (setjmp(jmploc.loc)) {
7886 switch (exception) {
7896 status = exitstatus;
7899 exitstatus = status;
7901 if (e == EXEXIT || state == 0 || iflag == 0 || ! rootshell)
7905 outcslow('\n', stderr);
7907 popstackmark(&smark);
7908 FORCEINTON; /* enable interrupts */
7911 else if (state == 2)
7913 else if (state == 3)
7921 trputs("Shell args: "); trargs(argv);
7925 #ifdef CONFIG_ASH_RANDOM_SUPPORT
7926 rseed = rootpid + ((time_t)time((time_t *)0));
7930 setstackmark(&smark);
7931 procargs(argc, argv);
7932 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
7934 const char *hp = lookupvar("HISTFILE");
7937 hp = lookupvar("HOME");
7939 char *defhp = concat_path_file(hp, ".ash_history");
7940 setvar("HISTFILE", defhp, 0);
7946 if (argv[0] && argv[0][0] == '-')
7950 read_profile("/etc/profile");
7953 read_profile(".profile");
7959 getuid() == geteuid() && getgid() == getegid() &&
7963 if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
7964 read_profile(shinit);
7972 if (sflag || minusc == NULL) {
7973 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
7975 const char *hp = lookupvar("HISTFILE");
7978 load_history ( hp );
7981 state4: /* XXX ??? - why isn't this before the "if" statement */
7989 extern void _mcleanup(void);
7999 * Read and execute commands. "Top" is nonzero for the top level command
8000 * loop; it turns on prompting if the shell is interactive.
8007 struct stackmark smark;
8011 TRACE(("cmdloop(%d) called\n", top));
8013 setstackmark(&smark);
8018 showjobs(stderr, SHOW_CHANGED);
8023 #ifdef CONFIG_ASH_MAIL
8027 n = parsecmd(inter);
8028 /* showtree(n); DEBUG */
8030 if (!top || numeof >= 50)
8032 if (!stoppedjobs()) {
8035 out2str("\nUse \"exit\" to leave shell.\n");
8038 } else if (n != NULL && nflag == 0) {
8039 job_warning = (job_warning == 2) ? 1 : 0;
8043 popstackmark(&smark);
8053 * Read /etc/profile or .profile. Return on error.
8057 read_profile(const char *name)
8064 if ((fd = open(name, O_RDONLY)) >= 0)
8069 /* -q turns off -x and -v just when executing init files */
8072 xflag = 0, xflag_set = 1;
8074 vflag = 0, vflag_set = 1;
8088 * Read a file containing shell functions.
8092 readcmdfile(char *name)
8097 if ((fd = open(name, O_RDONLY)) >= 0)
8100 error("Can't open %s", name);
8108 * Take commands from a file. To be compatible we should do a path
8109 * search for the file, which is necessary to find sub-commands.
8112 static inline char *
8113 find_dot_file(char *name)
8116 const char *path = pathval();
8119 /* don't try this for absolute or relative paths */
8120 if (strchr(name, '/'))
8123 while ((fullname = padvance(&path, name)) != NULL) {
8124 if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
8126 * Don't bother freeing here, since it will
8127 * be freed by the caller.
8131 stunalloc(fullname);
8134 /* not found in the PATH */
8135 error(not_found_msg, name);
8139 static int dotcmd(int argc, char **argv)
8142 volatile struct shparam saveparam;
8146 for (sp = cmdenviron; sp; sp = sp->next)
8147 setvareq(bb_xstrdup(sp->text), VSTRFIXED | VTEXTFIXED);
8149 if (argc >= 2) { /* That's what SVR2 does */
8151 struct stackmark smark;
8153 setstackmark(&smark);
8154 fullname = find_dot_file(argv[1]);
8157 saveparam = shellparam;
8158 shellparam.malloc = 0;
8159 shellparam.nparam = argc - 2;
8160 shellparam.p = argv + 2;
8163 setinputfile(fullname, 1);
8164 commandname = fullname;
8169 freeparam(&shellparam);
8170 shellparam = saveparam;
8173 popstackmark(&smark);
8180 exitcmd(int argc, char **argv)
8185 exitstatus = number(argv[1]);
8190 /* $NetBSD: memalloc.c,v 1.27 2003/01/22 20:36:04 dsl Exp $ */
8193 * Same for malloc, realloc, but returns an error when out of space.
8197 ckrealloc(pointer p, size_t nbytes)
8199 p = realloc(p, nbytes);
8201 error(bb_msg_memory_exhausted);
8206 ckmalloc(size_t nbytes)
8208 return ckrealloc(NULL, nbytes);
8212 * Make a copy of a string in safe storage.
8216 savestr(const char *s)
8218 char *p = strdup(s);
8220 error(bb_msg_memory_exhausted);
8226 * Parse trees for commands are allocated in lifo order, so we use a stack
8227 * to make this more efficient, and also to avoid all sorts of exception
8228 * handling code to handle interrupts in the middle of a parse.
8230 * The size 504 was chosen because the Ultrix malloc handles that size
8236 stalloc(size_t nbytes)
8241 aligned = SHELL_ALIGN(nbytes);
8242 if (aligned > stacknleft) {
8245 struct stack_block *sp;
8247 blocksize = aligned;
8248 if (blocksize < MINSIZE)
8249 blocksize = MINSIZE;
8250 len = sizeof(struct stack_block) - MINSIZE + blocksize;
8251 if (len < blocksize)
8252 error(bb_msg_memory_exhausted);
8256 stacknxt = sp->space;
8257 stacknleft = blocksize;
8258 sstrend = stacknxt + blocksize;
8263 stacknxt += aligned;
8264 stacknleft -= aligned;
8270 stunalloc(pointer p)
8273 if (!p || (stacknxt < (char *)p) || ((char *)p < stackp->space)) {
8274 write(2, "stunalloc\n", 10);
8278 stacknleft += stacknxt - (char *)p;
8284 setstackmark(struct stackmark *mark)
8286 mark->stackp = stackp;
8287 mark->stacknxt = stacknxt;
8288 mark->stacknleft = stacknleft;
8289 mark->marknext = markp;
8295 popstackmark(struct stackmark *mark)
8297 struct stack_block *sp;
8300 markp = mark->marknext;
8301 while (stackp != mark->stackp) {
8306 stacknxt = mark->stacknxt;
8307 stacknleft = mark->stacknleft;
8308 sstrend = mark->stacknxt + mark->stacknleft;
8314 * When the parser reads in a string, it wants to stick the string on the
8315 * stack and only adjust the stack pointer when it knows how big the
8316 * string is. Stackblock (defined in stack.h) returns a pointer to a block
8317 * of space on top of the stack and stackblocklen returns the length of
8318 * this block. Growstackblock will grow this space by at least one byte,
8319 * possibly moving it (like realloc). Grabstackblock actually allocates the
8320 * part of the block that has been used.
8324 growstackblock(void)
8328 newlen = stacknleft * 2;
8329 if (newlen < stacknleft)
8330 error(bb_msg_memory_exhausted);
8334 if (stacknxt == stackp->space && stackp != &stackbase) {
8335 struct stack_block *oldstackp;
8336 struct stackmark *xmark;
8337 struct stack_block *sp;
8338 struct stack_block *prevstackp;
8344 prevstackp = sp->prev;
8345 grosslen = newlen + sizeof(struct stack_block) - MINSIZE;
8346 sp = ckrealloc((pointer)sp, grosslen);
8347 sp->prev = prevstackp;
8349 stacknxt = sp->space;
8350 stacknleft = newlen;
8351 sstrend = sp->space + newlen;
8354 * Stack marks pointing to the start of the old block
8355 * must be relocated to point to the new block
8358 while (xmark != NULL && xmark->stackp == oldstackp) {
8359 xmark->stackp = stackp;
8360 xmark->stacknxt = stacknxt;
8361 xmark->stacknleft = stacknleft;
8362 xmark = xmark->marknext;
8366 char *oldspace = stacknxt;
8367 int oldlen = stacknleft;
8368 char *p = stalloc(newlen);
8370 /* free the space we just allocated */
8371 stacknxt = memcpy(p, oldspace, oldlen);
8372 stacknleft += newlen;
8377 grabstackblock(size_t len)
8379 len = SHELL_ALIGN(len);
8385 * The following routines are somewhat easier to use than the above.
8386 * The user declares a variable of type STACKSTR, which may be declared
8387 * to be a register. The macro STARTSTACKSTR initializes things. Then
8388 * the user uses the macro STPUTC to add characters to the string. In
8389 * effect, STPUTC(c, p) is the same as *p++ = c except that the stack is
8390 * grown as necessary. When the user is done, she can just leave the
8391 * string there and refer to it using stackblock(). Or she can allocate
8392 * the space for it using grabstackstr(). If it is necessary to allow
8393 * someone else to use the stack temporarily and then continue to grow
8394 * the string, the user should use grabstack to allocate the space, and
8395 * then call ungrabstr(p) to return to the previous mode of operation.
8397 * USTPUTC is like STPUTC except that it doesn't check for overflow.
8398 * CHECKSTACKSPACE can be called before USTPUTC to ensure that there
8399 * is space for at least one character.
8405 size_t len = stackblocksize();
8406 if (herefd >= 0 && len >= 1024) {
8407 bb_full_write(herefd, stackblock(), len);
8408 return stackblock();
8411 return stackblock() + len;
8415 * Called from CHECKSTRSPACE.
8419 makestrspace(size_t newlen, char *p)
8421 size_t len = p - stacknxt;
8422 size_t size = stackblocksize();
8427 size = stackblocksize();
8429 if (nleft >= newlen)
8433 return stackblock() + len;
8437 stnputs(const char *s, size_t n, char *p)
8439 p = makestrspace(n, p);
8440 p = mempcpy(p, s, n);
8445 stputs(const char *s, char *p)
8447 return stnputs(s, strlen(s), p);
8450 /* $NetBSD: mystring.c,v 1.15 2002/11/24 22:35:42 christos Exp $ */
8455 * number(s) Convert a string of digits to an integer.
8456 * is_number(s) Return true if s is a string of digits.
8460 * prefix -- see if pfx is a prefix of string.
8464 prefix(const char *string, const char *pfx)
8467 if (*pfx++ != *string++)
8470 return (char *) string;
8475 * Convert a string of digits to an integer, printing an error message on
8480 number(const char *s)
8490 * Check for a valid number. This should be elsewhere.
8494 is_number(const char *p)
8499 } while (*++p != '\0');
8505 * Produce a possibly single quoted string suitable as input to the shell.
8506 * The return string is allocated on the stack.
8510 single_quote(const char *s) {
8519 len = strchrnul(s, '\'') - s;
8521 q = p = makestrspace(len + 3, p);
8524 q = mempcpy(q, s, len);
8530 len = strspn(s, "'");
8534 q = p = makestrspace(len + 3, p);
8537 q = mempcpy(q, s, len);
8546 return stackblock();
8550 * Like strdup but works with the ash stack.
8554 sstrdup(const char *p)
8556 size_t len = strlen(p) + 1;
8557 return memcpy(stalloc(len), p, len);
8562 calcsize(union node *n)
8566 funcblocksize += nodesize[n->type];
8569 calcsize(n->ncmd.redirect);
8570 calcsize(n->ncmd.args);
8571 calcsize(n->ncmd.assign);
8574 sizenodelist(n->npipe.cmdlist);
8579 calcsize(n->nredir.redirect);
8580 calcsize(n->nredir.n);
8587 calcsize(n->nbinary.ch2);
8588 calcsize(n->nbinary.ch1);
8591 calcsize(n->nif.elsepart);
8592 calcsize(n->nif.ifpart);
8593 calcsize(n->nif.test);
8596 funcstringsize += strlen(n->nfor.var) + 1;
8597 calcsize(n->nfor.body);
8598 calcsize(n->nfor.args);
8601 calcsize(n->ncase.cases);
8602 calcsize(n->ncase.expr);
8605 calcsize(n->nclist.body);
8606 calcsize(n->nclist.pattern);
8607 calcsize(n->nclist.next);
8611 sizenodelist(n->narg.backquote);
8612 funcstringsize += strlen(n->narg.text) + 1;
8613 calcsize(n->narg.next);
8620 calcsize(n->nfile.fname);
8621 calcsize(n->nfile.next);
8625 calcsize(n->ndup.vname);
8626 calcsize(n->ndup.next);
8630 calcsize(n->nhere.doc);
8631 calcsize(n->nhere.next);
8634 calcsize(n->nnot.com);
8641 sizenodelist(struct nodelist *lp)
8644 funcblocksize += SHELL_ALIGN(sizeof(struct nodelist));
8652 copynode(union node *n)
8659 funcblock = (char *) funcblock + nodesize[n->type];
8662 new->ncmd.redirect = copynode(n->ncmd.redirect);
8663 new->ncmd.args = copynode(n->ncmd.args);
8664 new->ncmd.assign = copynode(n->ncmd.assign);
8667 new->npipe.cmdlist = copynodelist(n->npipe.cmdlist);
8668 new->npipe.backgnd = n->npipe.backgnd;
8673 new->nredir.redirect = copynode(n->nredir.redirect);
8674 new->nredir.n = copynode(n->nredir.n);
8681 new->nbinary.ch2 = copynode(n->nbinary.ch2);
8682 new->nbinary.ch1 = copynode(n->nbinary.ch1);
8685 new->nif.elsepart = copynode(n->nif.elsepart);
8686 new->nif.ifpart = copynode(n->nif.ifpart);
8687 new->nif.test = copynode(n->nif.test);
8690 new->nfor.var = nodesavestr(n->nfor.var);
8691 new->nfor.body = copynode(n->nfor.body);
8692 new->nfor.args = copynode(n->nfor.args);
8695 new->ncase.cases = copynode(n->ncase.cases);
8696 new->ncase.expr = copynode(n->ncase.expr);
8699 new->nclist.body = copynode(n->nclist.body);
8700 new->nclist.pattern = copynode(n->nclist.pattern);
8701 new->nclist.next = copynode(n->nclist.next);
8705 new->narg.backquote = copynodelist(n->narg.backquote);
8706 new->narg.text = nodesavestr(n->narg.text);
8707 new->narg.next = copynode(n->narg.next);
8714 new->nfile.fname = copynode(n->nfile.fname);
8715 new->nfile.fd = n->nfile.fd;
8716 new->nfile.next = copynode(n->nfile.next);
8720 new->ndup.vname = copynode(n->ndup.vname);
8721 new->ndup.dupfd = n->ndup.dupfd;
8722 new->ndup.fd = n->ndup.fd;
8723 new->ndup.next = copynode(n->ndup.next);
8727 new->nhere.doc = copynode(n->nhere.doc);
8728 new->nhere.fd = n->nhere.fd;
8729 new->nhere.next = copynode(n->nhere.next);
8732 new->nnot.com = copynode(n->nnot.com);
8735 new->type = n->type;
8740 static struct nodelist *
8741 copynodelist(struct nodelist *lp)
8743 struct nodelist *start;
8744 struct nodelist **lpp;
8749 funcblock = (char *) funcblock +
8750 SHELL_ALIGN(sizeof(struct nodelist));
8751 (*lpp)->n = copynode(lp->n);
8753 lpp = &(*lpp)->next;
8761 nodesavestr(char *s)
8763 char *rtn = funcstring;
8765 funcstring = stpcpy(funcstring, s) + 1;
8771 * Free a parse tree.
8775 freefunc(struct funcnode *f)
8777 if (f && --f->count < 0)
8782 static void options(int);
8783 static void setoption(int, int);
8787 * Process the shell command line arguments.
8791 procargs(int argc, char **argv)
8794 const char *xminusc;
8801 for (i = 0; i < NOPTS; i++)
8807 if (*xargv == NULL) {
8809 error("-c requires an argument");
8812 if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
8816 for (i = 0; i < NOPTS; i++)
8817 if (optlist[i] == 2)
8822 /* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
8827 } else if (!sflag) {
8828 setinputfile(*xargv, 0);
8834 shellparam.p = xargv;
8835 #ifdef CONFIG_ASH_GETOPTS
8836 shellparam.optind = 1;
8837 shellparam.optoff = -1;
8839 /* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
8841 shellparam.nparam++;
8854 setinteractive(iflag);
8859 minus_o(char *name, int val)
8864 out1str("Current option settings\n");
8865 for (i = 0; i < NOPTS; i++)
8866 out1fmt("%-16s%s\n", optnames(i),
8867 optlist[i] ? "on" : "off");
8869 for (i = 0; i < NOPTS; i++)
8870 if (equal(name, optnames(i))) {
8874 error("Illegal option -o %s", name);
8879 * Process shell options. The global variable argptr contains a pointer
8880 * to the argument list; we advance it past the options.
8884 options(int cmdline)
8892 while ((p = *argptr) != NULL) {
8894 if ((c = *p++) == '-') {
8896 if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
8898 /* "-" means turn off -x and -v */
8901 /* "--" means reset params */
8902 else if (*argptr == NULL)
8905 break; /* "-" or "--" terminates options */
8907 } else if (c == '+') {
8913 while ((c = *p++) != '\0') {
8914 if (c == 'c' && cmdline) {
8915 minusc = p; /* command is after shell args*/
8916 } else if (c == 'o') {
8917 minus_o(*argptr, val);
8920 } else if (cmdline && (c == '-')) { // long options
8921 if (strcmp(p, "login") == 0)
8933 setoption(int flag, int val)
8937 for (i = 0; i < NOPTS; i++)
8938 if (optletters(i) == flag) {
8942 error("Illegal option -%c", flag);
8949 * Set the shell parameters.
8953 setparam(char **argv)
8959 for (nparam = 0 ; argv[nparam] ; nparam++);
8960 ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
8962 *ap++ = savestr(*argv++);
8965 freeparam(&shellparam);
8966 shellparam.malloc = 1;
8967 shellparam.nparam = nparam;
8968 shellparam.p = newparam;
8969 #ifdef CONFIG_ASH_GETOPTS
8970 shellparam.optind = 1;
8971 shellparam.optoff = -1;
8977 * Free the list of positional parameters.
8981 freeparam(volatile struct shparam *param)
8985 if (param->malloc) {
8986 for (ap = param->p ; *ap ; ap++)
8995 * The shift builtin command.
8999 shiftcmd(int argc, char **argv)
9006 n = number(argv[1]);
9007 if (n > shellparam.nparam)
9008 error("can't shift that many");
9010 shellparam.nparam -= n;
9011 for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
9012 if (shellparam.malloc)
9016 while ((*ap2++ = *ap1++) != NULL);
9017 #ifdef CONFIG_ASH_GETOPTS
9018 shellparam.optind = 1;
9019 shellparam.optoff = -1;
9028 * The set command builtin.
9032 setcmd(int argc, char **argv)
9035 return showvars(nullstr, 0, VUNSET);
9039 if (*argptr != NULL) {
9047 #ifdef CONFIG_ASH_GETOPTS
9052 shellparam.optind = number(value);
9053 shellparam.optoff = -1;
9057 #ifdef CONFIG_LOCALE_SUPPORT
9058 static void change_lc_all(const char *value)
9060 if (value != 0 && *value != 0)
9061 setlocale(LC_ALL, value);
9064 static void change_lc_ctype(const char *value)
9066 if (value != 0 && *value != 0)
9067 setlocale(LC_CTYPE, value);
9072 #ifdef CONFIG_ASH_RANDOM_SUPPORT
9073 /* Roughly copied from bash.. */
9074 static void change_random(const char *value)
9077 /* "get", generate */
9080 rseed = rseed * 1103515245 + 12345;
9081 sprintf(buf, "%d", (unsigned int)((rseed & 32767)));
9082 /* set without recursion */
9083 setvar(vrandom.text, buf, VNOFUNC);
9084 vrandom.flags &= ~VNOFUNC;
9087 rseed = strtoul(value, (char **)NULL, 10);
9093 #ifdef CONFIG_ASH_GETOPTS
9095 getopts(char *optstr, char *optvar, char **optfirst, int *param_optind, int *optoff)
9104 if(*param_optind < 1)
9106 optnext = optfirst + *param_optind - 1;
9108 if (*param_optind <= 1 || *optoff < 0 || strlen(optnext[-1]) < *optoff)
9111 p = optnext[-1] + *optoff;
9112 if (p == NULL || *p == '\0') {
9113 /* Current word is done, advance */
9115 if (p == NULL || *p != '-' || *++p == '\0') {
9122 if (p[0] == '-' && p[1] == '\0') /* check for "--" */
9127 for (q = optstr; *q != c; ) {
9129 if (optstr[0] == ':') {
9132 err |= setvarsafe("OPTARG", s, 0);
9134 fprintf(stderr, "Illegal option -%c\n", c);
9135 (void) unsetvar("OPTARG");
9145 if (*p == '\0' && (p = *optnext) == NULL) {
9146 if (optstr[0] == ':') {
9149 err |= setvarsafe("OPTARG", s, 0);
9152 fprintf(stderr, "No arg for -%c option\n", c);
9153 (void) unsetvar("OPTARG");
9161 err |= setvarsafe("OPTARG", p, 0);
9164 err |= setvarsafe("OPTARG", nullstr, 0);
9167 *optoff = p ? p - *(optnext - 1) : -1;
9168 *param_optind = optnext - optfirst + 1;
9169 fmtstr(s, sizeof(s), "%d", *param_optind);
9170 err |= setvarsafe("OPTIND", s, VNOFUNC);
9173 err |= setvarsafe(optvar, s, 0);
9184 * The getopts builtin. Shellparam.optnext points to the next argument
9185 * to be processed. Shellparam.optptr points to the next character to
9186 * be processed in the current argument. If shellparam.optnext is NULL,
9187 * then it's the first time getopts has been called.
9191 getoptscmd(int argc, char **argv)
9196 error("Usage: getopts optstring var [arg]");
9197 else if (argc == 3) {
9198 optbase = shellparam.p;
9199 if (shellparam.optind > shellparam.nparam + 1) {
9200 shellparam.optind = 1;
9201 shellparam.optoff = -1;
9206 if (shellparam.optind > argc - 2) {
9207 shellparam.optind = 1;
9208 shellparam.optoff = -1;
9212 return getopts(argv[1], argv[2], optbase, &shellparam.optind,
9213 &shellparam.optoff);
9215 #endif /* CONFIG_ASH_GETOPTS */
9218 * XXX - should get rid of. have all builtins use getopt(3). the
9219 * library getopt must have the BSD extension static variable "optreset"
9220 * otherwise it can't be used within the shell safely.
9222 * Standard option processing (a la getopt) for builtin routines. The
9223 * only argument that is passed to nextopt is the option string; the
9224 * other arguments are unnecessary. It return the character, or '\0' on
9229 nextopt(const char *optstring)
9235 if ((p = optptr) == NULL || *p == '\0') {
9237 if (p == NULL || *p != '-' || *++p == '\0')
9240 if (p[0] == '-' && p[1] == '\0') /* check for "--" */
9244 for (q = optstring ; *q != c ; ) {
9246 error("Illegal option -%c", c);
9251 if (*p == '\0' && (p = *argptr++) == NULL)
9252 error("No arg for -%c option", c);
9261 /* $NetBSD: output.c,v 1.27 2002/11/24 22:35:42 christos Exp $ */
9264 outstr(const char *p, FILE *file)
9289 outcslow(int c, FILE *dest)
9299 out1fmt(const char *fmt, ...)
9306 r = vprintf(fmt, ap);
9314 fmtstr(char *outbuf, size_t length, const char *fmt, ...)
9321 ret = vsnprintf(outbuf, length, fmt, ap);
9329 /* $NetBSD: parser.c,v 1.54 2002/11/24 22:35:42 christos Exp $ */
9333 * Shell command parser.
9336 #define EOFMARKLEN 79
9340 struct heredoc *next; /* next here document in list */
9341 union node *here; /* redirection node */
9342 char *eofmark; /* string indicating end of input */
9343 int striptabs; /* if set, strip leading tabs */
9348 static struct heredoc *heredoclist; /* list of here documents to read */
9351 static union node *list(int);
9352 static union node *andor(void);
9353 static union node *pipeline(void);
9354 static union node *command(void);
9355 static union node *simplecmd(void);
9356 static union node *makename(void);
9357 static void parsefname(void);
9358 static void parseheredoc(void);
9359 static char peektoken(void);
9360 static int readtoken(void);
9361 static int xxreadtoken(void);
9362 static int readtoken1(int firstc, int syntax, char *eofmark, int striptabs);
9363 static int noexpand(char *);
9364 static void synexpect(int) __attribute__((__noreturn__));
9365 static void synerror(const char *) __attribute__((__noreturn__));
9366 static void setprompt(int);
9371 isassignment(const char *p)
9373 const char *q = endofname(p);
9381 * Read and parse a command. Returns NEOF on end of file. (NULL is a
9382 * valid parse tree indicating a blank line.)
9386 parsecmd(int interact)
9391 doprompt = interact;
9393 setprompt(doprompt);
9408 union node *n1, *n2, *n3;
9411 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9412 if (nlflag == 2 && peektoken())
9418 if (tok == TBACKGND) {
9419 if (n2->type == NPIPE) {
9420 n2->npipe.backgnd = 1;
9422 if (n2->type != NREDIR) {
9423 n3 = stalloc(sizeof(struct nredir));
9425 n3->nredir.redirect = NULL;
9428 n2->type = NBACKGND;
9435 n3 = (union node *)stalloc(sizeof (struct nbinary));
9437 n3->nbinary.ch1 = n1;
9438 n3->nbinary.ch2 = n2;
9454 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9462 pungetc(); /* push back EOF on input */
9478 union node *n1, *n2, *n3;
9483 if ((t = readtoken()) == TAND) {
9485 } else if (t == TOR) {
9491 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9493 n3 = (union node *)stalloc(sizeof (struct nbinary));
9495 n3->nbinary.ch1 = n1;
9496 n3->nbinary.ch2 = n2;
9506 union node *n1, *n2, *pipenode;
9507 struct nodelist *lp, *prev;
9511 TRACE(("pipeline: entered\n"));
9512 if (readtoken() == TNOT) {
9514 checkkwd = CHKKWD | CHKALIAS;
9518 if (readtoken() == TPIPE) {
9519 pipenode = (union node *)stalloc(sizeof (struct npipe));
9520 pipenode->type = NPIPE;
9521 pipenode->npipe.backgnd = 0;
9522 lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
9523 pipenode->npipe.cmdlist = lp;
9527 lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
9528 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9531 } while (readtoken() == TPIPE);
9537 n2 = (union node *)stalloc(sizeof (struct nnot));
9550 union node *n1, *n2;
9551 union node *ap, **app;
9552 union node *cp, **cpp;
9553 union node *redir, **rpp;
9560 switch (readtoken()) {
9565 n1 = (union node *)stalloc(sizeof (struct nif));
9567 n1->nif.test = list(0);
9568 if (readtoken() != TTHEN)
9570 n1->nif.ifpart = list(0);
9572 while (readtoken() == TELIF) {
9573 n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif));
9574 n2 = n2->nif.elsepart;
9576 n2->nif.test = list(0);
9577 if (readtoken() != TTHEN)
9579 n2->nif.ifpart = list(0);
9581 if (lasttoken == TELSE)
9582 n2->nif.elsepart = list(0);
9584 n2->nif.elsepart = NULL;
9592 n1 = (union node *)stalloc(sizeof (struct nbinary));
9593 n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL;
9594 n1->nbinary.ch1 = list(0);
9595 if ((got=readtoken()) != TDO) {
9596 TRACE(("expecting DO got %s %s\n", tokname(got), got == TWORD ? wordtext : ""));
9599 n1->nbinary.ch2 = list(0);
9604 if (readtoken() != TWORD || quoteflag || ! goodname(wordtext))
9605 synerror("Bad for loop variable");
9606 n1 = (union node *)stalloc(sizeof (struct nfor));
9608 n1->nfor.var = wordtext;
9609 checkkwd = CHKKWD | CHKALIAS;
9610 if (readtoken() == TIN) {
9612 while (readtoken() == TWORD) {
9613 n2 = (union node *)stalloc(sizeof (struct narg));
9615 n2->narg.text = wordtext;
9616 n2->narg.backquote = backquotelist;
9618 app = &n2->narg.next;
9622 if (lasttoken != TNL && lasttoken != TSEMI)
9625 n2 = (union node *)stalloc(sizeof (struct narg));
9627 n2->narg.text = (char *)dolatstr;
9628 n2->narg.backquote = NULL;
9629 n2->narg.next = NULL;
9632 * Newline or semicolon here is optional (but note
9633 * that the original Bourne shell only allowed NL).
9635 if (lasttoken != TNL && lasttoken != TSEMI)
9638 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9639 if (readtoken() != TDO)
9641 n1->nfor.body = list(0);
9645 n1 = (union node *)stalloc(sizeof (struct ncase));
9647 if (readtoken() != TWORD)
9649 n1->ncase.expr = n2 = (union node *)stalloc(sizeof (struct narg));
9651 n2->narg.text = wordtext;
9652 n2->narg.backquote = backquotelist;
9653 n2->narg.next = NULL;
9655 checkkwd = CHKKWD | CHKALIAS;
9656 } while (readtoken() == TNL);
9657 if (lasttoken != TIN)
9659 cpp = &n1->ncase.cases;
9661 checkkwd = CHKNL | CHKKWD;
9664 if (lasttoken == TLP)
9666 *cpp = cp = (union node *)stalloc(sizeof (struct nclist));
9668 app = &cp->nclist.pattern;
9670 *app = ap = (union node *)stalloc(sizeof (struct narg));
9672 ap->narg.text = wordtext;
9673 ap->narg.backquote = backquotelist;
9674 if (readtoken() != TPIPE)
9676 app = &ap->narg.next;
9679 ap->narg.next = NULL;
9680 if (lasttoken != TRP)
9682 cp->nclist.body = list(2);
9684 cpp = &cp->nclist.next;
9686 checkkwd = CHKNL | CHKKWD;
9687 if ((t = readtoken()) != TESAC) {
9689 synexpect(TENDCASE);
9697 n1 = (union node *)stalloc(sizeof (struct nredir));
9698 n1->type = NSUBSHELL;
9699 n1->nredir.n = list(0);
9700 n1->nredir.redirect = NULL;
9713 if (readtoken() != t)
9717 /* Now check for redirection which may follow command */
9718 checkkwd = CHKKWD | CHKALIAS;
9720 while (readtoken() == TREDIR) {
9721 *rpp = n2 = redirnode;
9722 rpp = &n2->nfile.next;
9728 if (n1->type != NSUBSHELL) {
9729 n2 = (union node *)stalloc(sizeof (struct nredir));
9734 n1->nredir.redirect = redir;
9743 union node *args, **app;
9744 union node *n = NULL;
9745 union node *vars, **vpp;
9746 union node **rpp, *redir;
9756 savecheckkwd = CHKALIAS;
9758 checkkwd = savecheckkwd;
9759 switch (readtoken()) {
9761 n = (union node *)stalloc(sizeof (struct narg));
9763 n->narg.text = wordtext;
9764 n->narg.backquote = backquotelist;
9765 if (savecheckkwd && isassignment(wordtext)) {
9767 vpp = &n->narg.next;
9770 app = &n->narg.next;
9775 *rpp = n = redirnode;
9776 rpp = &n->nfile.next;
9777 parsefname(); /* read name of redirection file */
9781 args && app == &args->narg.next &&
9784 struct builtincmd *bcmd;
9787 /* We have a function */
9788 if (readtoken() != TRP)
9790 name = n->narg.text;
9792 !goodname(name) || (
9793 (bcmd = find_builtin(name)) &&
9794 IS_BUILTIN_SPECIAL(bcmd)
9797 synerror("Bad function name");
9799 checkkwd = CHKNL | CHKKWD | CHKALIAS;
9800 n->narg.next = command();
9813 n = (union node *)stalloc(sizeof (struct ncmd));
9815 n->ncmd.args = args;
9816 n->ncmd.assign = vars;
9817 n->ncmd.redirect = redir;
9826 n = (union node *)stalloc(sizeof (struct narg));
9828 n->narg.next = NULL;
9829 n->narg.text = wordtext;
9830 n->narg.backquote = backquotelist;
9834 void fixredir(union node *n, const char *text, int err)
9836 TRACE(("Fix redir %s %d\n", text, err));
9838 n->ndup.vname = NULL;
9840 if (is_digit(text[0]) && text[1] == '\0')
9841 n->ndup.dupfd = digit_val(text[0]);
9842 else if (text[0] == '-' && text[1] == '\0')
9847 synerror("Bad fd number");
9849 n->ndup.vname = makename();
9857 union node *n = redirnode;
9859 if (readtoken() != TWORD)
9861 if (n->type == NHERE) {
9862 struct heredoc *here = heredoc;
9868 TRACE(("Here document %d\n", n->type));
9869 if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN)
9870 synerror("Illegal eof marker for << redirection");
9871 rmescapes(wordtext);
9872 here->eofmark = wordtext;
9874 if (heredoclist == NULL)
9877 for (p = heredoclist ; p->next ; p = p->next);
9880 } else if (n->type == NTOFD || n->type == NFROMFD) {
9881 fixredir(n, wordtext, 0);
9883 n->nfile.fname = makename();
9889 * Input any here documents.
9895 struct heredoc *here;
9906 readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX,
9907 here->eofmark, here->striptabs);
9908 n = (union node *)stalloc(sizeof (struct narg));
9909 n->narg.type = NARG;
9910 n->narg.next = NULL;
9911 n->narg.text = wordtext;
9912 n->narg.backquote = backquotelist;
9913 here->here->nhere.doc = n;
9918 static char peektoken(void)
9924 return tokname_array[t][0];
9932 int alreadyseen = tokpushback;
9935 #ifdef CONFIG_ASH_ALIAS
9944 if (checkkwd & CHKNL) {
9951 if (t != TWORD || quoteflag) {
9956 * check for keywords
9958 if (checkkwd & CHKKWD) {
9959 const char *const *pp;
9961 if ((pp = findkwd(wordtext))) {
9962 lasttoken = t = pp - tokname_array;
9963 TRACE(("keyword %s recognized\n", tokname(t)));
9968 if (checkkwd & CHKALIAS) {
9969 #ifdef CONFIG_ASH_ALIAS
9971 if ((ap = lookupalias(wordtext, 1)) != NULL) {
9973 pushstring(ap->val, ap);
9983 TRACE(("token %s %s\n", tokname(t), t == TWORD ? wordtext : ""));
9985 TRACE(("reread token %s %s\n", tokname(t), t == TWORD ? wordtext : ""));
9992 * Read the next input token.
9993 * If the token is a word, we set backquotelist to the list of cmds in
9994 * backquotes. We set quoteflag to true if any part of the word was
9996 * If the token is TREDIR, then we set redirnode to a structure containing
9998 * In all cases, the variable startlinno is set to the number of the line
9999 * on which the token starts.
10001 * [Change comment: here documents and internal procedures]
10002 * [Readtoken shouldn't have any arguments. Perhaps we should make the
10003 * word parsing code into a separate routine. In this case, readtoken
10004 * doesn't need to have any internal procedures, but parseword does.
10005 * We could also make parseoperator in essence the main routine, and
10006 * have parseword (readtoken1?) handle both words and redirection.]
10009 #define NEW_xxreadtoken
10010 #ifdef NEW_xxreadtoken
10012 /* singles must be first! */
10013 static const char xxreadtoken_chars[7] = { '\n', '(', ')', '&', '|', ';', 0 };
10015 static const char xxreadtoken_tokens[] = {
10016 TNL, TLP, TRP, /* only single occurrence allowed */
10017 TBACKGND, TPIPE, TSEMI, /* if single occurrence */
10018 TEOF, /* corresponds to trailing nul */
10019 TAND, TOR, TENDCASE, /* if double occurrence */
10022 #define xxreadtoken_doubles \
10023 (sizeof(xxreadtoken_tokens) - sizeof(xxreadtoken_chars))
10024 #define xxreadtoken_singles \
10025 (sizeof(xxreadtoken_chars) - xxreadtoken_doubles - 1)
10027 static int xxreadtoken()
10039 startlinno = plinno;
10040 for (;;) { /* until token or start of word found */
10043 if ((c != ' ') && (c != '\t')
10044 #ifdef CONFIG_ASH_ALIAS
10049 while ((c = pgetc()) != '\n' && c != PEOF);
10051 } else if (c == '\\') {
10052 if (pgetc() != '\n') {
10056 startlinno = ++plinno;
10061 = xxreadtoken_chars + sizeof(xxreadtoken_chars) - 1;
10066 needprompt = doprompt;
10069 p = strchr(xxreadtoken_chars, c);
10072 return readtoken1(c, BASESYNTAX, (char *) NULL, 0);
10075 if (p - xxreadtoken_chars >= xxreadtoken_singles) {
10076 if (pgetc() == *p) { /* double occurrence? */
10077 p += xxreadtoken_doubles + 1;
10084 return lasttoken = xxreadtoken_tokens[p - xxreadtoken_chars];
10092 #define RETURN(token) return lasttoken = token
10107 startlinno = plinno;
10108 for (;;) { /* until token or start of word found */
10111 case ' ': case '\t':
10112 #ifdef CONFIG_ASH_ALIAS
10117 while ((c = pgetc()) != '\n' && c != PEOF);
10121 if (pgetc() == '\n') {
10122 startlinno = ++plinno;
10131 needprompt = doprompt;
10136 if (pgetc() == '&')
10141 if (pgetc() == '|')
10146 if (pgetc() == ';')
10159 return readtoken1(c, BASESYNTAX, (char *)NULL, 0);
10162 #endif /* NEW_xxreadtoken */
10166 * If eofmark is NULL, read a word or a redirection symbol. If eofmark
10167 * is not NULL, read a here document. In the latter case, eofmark is the
10168 * word which marks the end of the document and striptabs is true if
10169 * leading tabs should be stripped from the document. The argument firstc
10170 * is the first character of the input token or document.
10172 * Because C does not have internal subroutines, I have simulated them
10173 * using goto's to implement the subroutine linkage. The following macros
10174 * will run code that appears at the end of readtoken1.
10177 #define CHECKEND() {goto checkend; checkend_return:;}
10178 #define PARSEREDIR() {goto parseredir; parseredir_return:;}
10179 #define PARSESUB() {goto parsesub; parsesub_return:;}
10180 #define PARSEBACKQOLD() {oldstyle = 1; goto parsebackq; parsebackq_oldreturn:;}
10181 #define PARSEBACKQNEW() {oldstyle = 0; goto parsebackq; parsebackq_newreturn:;}
10182 #define PARSEARITH() {goto parsearith; parsearith_return:;}
10185 readtoken1(int firstc, int syntax, char *eofmark, int striptabs)
10190 char line[EOFMARKLEN + 1];
10191 struct nodelist *bqlist;
10194 int varnest; /* levels of variables expansion */
10195 int arinest; /* levels of arithmetic expansion */
10196 int parenlevel; /* levels of parens in arithmetic */
10197 int dqvarnest; /* levels of variables expansion within double quotes */
10199 int prevsyntax; /* syntax before arithmetic */
10201 /* Avoid longjmp clobbering */
10207 (void) &parenlevel;
10210 (void) &prevsyntax;
10214 startlinno = plinno;
10216 if (syntax == DQSYNTAX)
10225 STARTSTACKSTR(out);
10226 loop: { /* for each line, until end of word */
10227 CHECKEND(); /* set c to PEOF if at end of here document */
10228 for (;;) { /* until end of line or end of word */
10229 CHECKSTRSPACE(4, out); /* permit 4 calls to USTPUTC */
10230 switch(SIT(c, syntax)) {
10231 case CNL: /* '\n' */
10232 if (syntax == BASESYNTAX)
10233 goto endword; /* exit outer loop */
10239 goto loop; /* continue outer loop */
10244 if (eofmark == NULL || dblquote)
10245 USTPUTC(CTLESC, out);
10248 case CBACK: /* backslash */
10251 USTPUTC(CTLESC, out);
10252 USTPUTC('\\', out);
10254 } else if (c == '\n') {
10260 c != '\\' && c != '`' &&
10266 USTPUTC(CTLESC, out);
10267 USTPUTC('\\', out);
10269 if (SIT(c, SQSYNTAX) == CCTL)
10270 USTPUTC(CTLESC, out);
10278 if (eofmark == NULL) {
10279 USTPUTC(CTLQUOTEMARK, out);
10287 if (eofmark != NULL && arinest == 0 &&
10291 if (dqvarnest == 0) {
10292 syntax = BASESYNTAX;
10299 case CVAR: /* '$' */
10300 PARSESUB(); /* parse substitution */
10302 case CENDVAR: /* '}' */
10305 if (dqvarnest > 0) {
10308 USTPUTC(CTLENDVAR, out);
10313 #ifdef CONFIG_ASH_MATH_SUPPORT
10314 case CLP: /* '(' in arithmetic */
10318 case CRP: /* ')' in arithmetic */
10319 if (parenlevel > 0) {
10323 if (pgetc() == ')') {
10324 if (--arinest == 0) {
10325 USTPUTC(CTLENDARI, out);
10326 syntax = prevsyntax;
10327 if (syntax == DQSYNTAX)
10335 * unbalanced parens
10336 * (don't 2nd guess - no error)
10344 case CBQUOTE: /* '`' */
10348 goto endword; /* exit outer loop */
10353 goto endword; /* exit outer loop */
10354 #ifdef CONFIG_ASH_ALIAS
10364 #ifdef CONFIG_ASH_MATH_SUPPORT
10365 if (syntax == ARISYNTAX)
10366 synerror("Missing '))'");
10368 if (syntax != BASESYNTAX && ! parsebackquote && eofmark == NULL)
10369 synerror("Unterminated quoted string");
10370 if (varnest != 0) {
10371 startlinno = plinno;
10373 synerror("Missing '}'");
10375 USTPUTC('\0', out);
10376 len = out - (char *)stackblock();
10377 out = stackblock();
10378 if (eofmark == NULL) {
10379 if ((c == '>' || c == '<')
10382 && (*out == '\0' || is_digit(*out))) {
10384 return lasttoken = TREDIR;
10389 quoteflag = quotef;
10390 backquotelist = bqlist;
10391 grabstackblock(len);
10393 return lasttoken = TWORD;
10394 /* end of readtoken routine */
10399 * Check to see whether we are at the end of the here document. When this
10400 * is called, c is set to the first character of the next input line. If
10401 * we are at the end of the here document, this routine sets the c to PEOF.
10406 #ifdef CONFIG_ASH_ALIAS
10412 while (c == '\t') {
10416 if (c == *eofmark) {
10417 if (pfgets(line, sizeof line) != NULL) {
10421 for (q = eofmark + 1 ; *q && *p == *q ; p++, q++);
10422 if (*p == '\n' && *q == '\0') {
10425 needprompt = doprompt;
10427 pushstring(line, NULL);
10432 goto checkend_return;
10437 * Parse a redirection operator. The variable "out" points to a string
10438 * specifying the fd to be redirected. The variable "c" contains the
10439 * first character of the redirection operator.
10446 np = (union node *)stalloc(sizeof (struct nfile));
10451 np->type = NAPPEND;
10453 np->type = NCLOBBER;
10460 } else { /* c == '<' */
10462 switch (c = pgetc()) {
10464 if (sizeof (struct nfile) != sizeof (struct nhere)) {
10465 np = (union node *)stalloc(sizeof (struct nhere));
10469 heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc));
10470 heredoc->here = np;
10471 if ((c = pgetc()) == '-') {
10472 heredoc->striptabs = 1;
10474 heredoc->striptabs = 0;
10480 np->type = NFROMFD;
10484 np->type = NFROMTO;
10494 np->nfile.fd = digit_val(fd);
10496 goto parseredir_return;
10501 * Parse a substitution. At this point, we have read the dollar sign
10502 * and nothing else.
10510 static const char types[] = "}-+?=";
10514 c <= PEOA_OR_PEOF ||
10515 (c != '(' && c != '{' && !is_name(c) && !is_special(c))
10519 } else if (c == '(') { /* $(command) or $((arith)) */
10520 if (pgetc() == '(') {
10521 #ifdef CONFIG_ASH_MATH_SUPPORT
10524 synerror("We unsupport $((arith))");
10531 USTPUTC(CTLVAR, out);
10532 typeloc = out - (char *)stackblock();
10533 USTPUTC(VSNORMAL, out);
10534 subtype = VSNORMAL;
10538 if ((c = pgetc()) == '}')
10541 subtype = VSLENGTH;
10546 if (c > PEOA_OR_PEOF && is_name(c)) {
10550 } while (c > PEOA_OR_PEOF && is_in_name(c));
10551 } else if (is_digit(c)) {
10555 } while (is_digit(c));
10557 else if (is_special(c)) {
10562 badsub: synerror("Bad substitution");
10566 if (subtype == 0) {
10573 p = strchr(types, c);
10576 subtype = p - types + VSNORMAL;
10582 subtype = c == '#' ? VSTRIMLEFT :
10595 if (dblquote || arinest)
10597 *((char *)stackblock() + typeloc) = subtype | flags;
10598 if (subtype != VSNORMAL) {
10600 if (dblquote || arinest) {
10605 goto parsesub_return;
10610 * Called to parse command substitutions. Newstyle is set if the command
10611 * is enclosed inside $(...); nlpp is a pointer to the head of the linked
10612 * list of commands (passed by reference), and savelen is the number of
10613 * characters on the top of the stack which must be preserved.
10617 struct nodelist **nlpp;
10620 char *volatile str;
10621 struct jmploc jmploc;
10622 struct jmploc *volatile savehandler;
10626 (void) &saveprompt;
10629 savepbq = parsebackquote;
10630 if (setjmp(jmploc.loc)) {
10633 parsebackquote = 0;
10634 handler = savehandler;
10635 longjmp(handler->loc, 1);
10639 savelen = out - (char *)stackblock();
10641 str = ckmalloc(savelen);
10642 memcpy(str, stackblock(), savelen);
10644 savehandler = handler;
10648 /* We must read until the closing backquote, giving special
10649 treatment to some slashes, and then push the string and
10650 reread it as input, interpreting it normally. */
10657 STARTSTACKSTR(pout);
10663 switch (pc = pgetc()) {
10668 if ((pc = pgetc()) == '\n') {
10673 * If eating a newline, avoid putting
10674 * the newline into the new character
10675 * stream (via the STPUTC after the
10680 if (pc != '\\' && pc != '`' && pc != '$'
10681 && (!dblquote || pc != '"'))
10682 STPUTC('\\', pout);
10683 if (pc > PEOA_OR_PEOF) {
10689 #ifdef CONFIG_ASH_ALIAS
10692 startlinno = plinno;
10693 synerror("EOF in backquote substitution");
10697 needprompt = doprompt;
10706 STPUTC('\0', pout);
10707 psavelen = pout - (char *)stackblock();
10708 if (psavelen > 0) {
10709 pstr = grabstackstr(pout);
10710 setinputstring(pstr);
10715 nlpp = &(*nlpp)->next;
10716 *nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist));
10717 (*nlpp)->next = NULL;
10718 parsebackquote = oldstyle;
10721 saveprompt = doprompt;
10728 doprompt = saveprompt;
10730 if (readtoken() != TRP)
10737 * Start reading from old file again, ignoring any pushed back
10738 * tokens left from the backquote parsing
10743 while (stackblocksize() <= savelen)
10745 STARTSTACKSTR(out);
10747 memcpy(out, str, savelen);
10748 STADJUST(savelen, out);
10754 parsebackquote = savepbq;
10755 handler = savehandler;
10756 if (arinest || dblquote)
10757 USTPUTC(CTLBACKQ | CTLQUOTE, out);
10759 USTPUTC(CTLBACKQ, out);
10761 goto parsebackq_oldreturn;
10763 goto parsebackq_newreturn;
10766 #ifdef CONFIG_ASH_MATH_SUPPORT
10768 * Parse an arithmetic expansion (indicate start of one and set state)
10772 if (++arinest == 1) {
10773 prevsyntax = syntax;
10774 syntax = ARISYNTAX;
10775 USTPUTC(CTLARI, out);
10782 * we collapse embedded arithmetic expansion to
10783 * parenthesis, which should be equivalent
10787 goto parsearith_return;
10791 } /* end of readtoken */
10796 * Returns true if the text contains nothing to expand (no dollar signs
10801 noexpand(char *text)
10807 while ((c = *p++) != '\0') {
10808 if (c == CTLQUOTEMARK)
10812 else if (SIT(c, BASESYNTAX) == CCTL)
10820 * Return of a legal variable name (a letter or underscore followed by zero or
10821 * more letters, underscores, and digits).
10825 endofname(const char *name)
10833 if (! is_in_name(*p))
10841 * Called when an unexpected token is read during the parse. The argument
10842 * is the token that is expected, or -1 if more than one type of token can
10843 * occur at this point.
10846 static void synexpect(int token)
10851 l = sprintf(msg, "%s unexpected", tokname(lasttoken));
10853 sprintf(msg + l, " (expecting %s)", tokname(token));
10859 synerror(const char *msg)
10861 error("Syntax error: %s", msg);
10867 * called by editline -- any expansions to the prompt
10868 * should be added here.
10871 static void setprompt(int whichprompt)
10873 const char *prompt;
10875 switch (whichprompt) {
10889 static const char *const *findkwd(const char *s)
10891 return bsearch(s, tokname_array + KWDOFFSET,
10892 (sizeof(tokname_array) / sizeof(const char *)) - KWDOFFSET,
10893 sizeof(const char *), pstrcmp);
10896 /* $NetBSD: redir.c,v 1.27 2002/11/24 22:35:42 christos Exp $ */
10899 * Code for dealing with input/output redirection.
10902 #define EMPTY -2 /* marks an unused slot in redirtab */
10904 # define PIPESIZE 4096 /* amount of buffering in a pipe */
10906 # define PIPESIZE PIPE_BUF
10910 * Open a file in noclobber mode.
10911 * The code was copied from bash.
10914 noclobberopen(const char *fname)
10917 struct stat finfo, finfo2;
10920 * If the file exists and is a regular file, return an error
10923 r = stat(fname, &finfo);
10924 if (r == 0 && S_ISREG(finfo.st_mode)) {
10930 * If the file was not present (r != 0), make sure we open it
10931 * exclusively so that if it is created before we open it, our open
10932 * will fail. Make sure that we do not truncate an existing file.
10933 * Note that we don't turn on O_EXCL unless the stat failed -- if the
10934 * file was not a regular file, we leave O_EXCL off.
10937 return open(fname, O_WRONLY|O_CREAT|O_EXCL, 0666);
10938 fd = open(fname, O_WRONLY|O_CREAT, 0666);
10940 /* If the open failed, return the file descriptor right away. */
10945 * OK, the open succeeded, but the file may have been changed from a
10946 * non-regular file to a regular file between the stat and the open.
10947 * We are assuming that the O_EXCL open handles the case where FILENAME
10948 * did not exist and is symlinked to an existing file between the stat
10953 * If we can open it and fstat the file descriptor, and neither check
10954 * revealed that it was a regular file, and the file has not been
10955 * replaced, return the file descriptor.
10957 if (fstat(fd, &finfo2) == 0 && !S_ISREG(finfo2.st_mode) &&
10958 finfo.st_dev == finfo2.st_dev && finfo.st_ino == finfo2.st_ino)
10961 /* The file has been replaced. badness. */
10968 * Handle here documents. Normally we fork off a process to write the
10969 * data to a pipe. If the document is short, we can stuff the data in
10970 * the pipe without forking.
10974 openhere(union node *redir)
10980 error("Pipe call failed");
10981 if (redir->type == NHERE) {
10982 len = strlen(redir->nhere.doc->narg.text);
10983 if (len <= PIPESIZE) {
10984 bb_full_write(pip[1], redir->nhere.doc->narg.text, len);
10988 if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
10990 signal(SIGINT, SIG_IGN);
10991 signal(SIGQUIT, SIG_IGN);
10992 signal(SIGHUP, SIG_IGN);
10994 signal(SIGTSTP, SIG_IGN);
10996 signal(SIGPIPE, SIG_DFL);
10997 if (redir->type == NHERE)
10998 bb_full_write(pip[1], redir->nhere.doc->narg.text, len);
11000 expandhere(redir->nhere.doc, pip[1]);
11009 openredirect(union node *redir)
11014 switch (redir->nfile.type) {
11016 fname = redir->nfile.expfname;
11017 if ((f = open(fname, O_RDONLY)) < 0)
11021 fname = redir->nfile.expfname;
11022 if ((f = open(fname, O_RDWR|O_CREAT|O_TRUNC, 0666)) < 0)
11026 /* Take care of noclobber mode. */
11028 fname = redir->nfile.expfname;
11029 if ((f = noclobberopen(fname)) < 0)
11035 fname = redir->nfile.expfname;
11036 if ((f = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
11040 fname = redir->nfile.expfname;
11041 if ((f = open(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0)
11048 /* Fall through to eliminate warning. */
11055 f = openhere(redir);
11061 error("cannot create %s: %s", fname, errmsg(errno, E_CREAT));
11063 error("cannot open %s: %s", fname, errmsg(errno, E_OPEN));
11067 dupredirect(union node *redir, int f)
11069 int fd = redir->nfile.fd;
11071 if (redir->nfile.type == NTOFD || redir->nfile.type == NFROMFD) {
11072 if (redir->ndup.dupfd >= 0) { /* if not ">&-" */
11073 copyfd(redir->ndup.dupfd, fd);
11086 * Process a list of redirection commands. If the REDIR_PUSH flag is set,
11087 * old file descriptors are stashed away so that the redirection can be
11088 * undone by calling popredir. If the REDIR_BACKQ flag is set, then the
11089 * standard output, and the standard error if it becomes a duplicate of
11090 * stdout, is saved in memory.
11094 redirect(union node *redir, int flags)
11097 struct redirtab *sv;
11108 if (flags & REDIR_PUSH) {
11109 struct redirtab *q;
11110 q = ckmalloc(sizeof (struct redirtab));
11111 q->next = redirlist;
11113 q->nullredirs = nullredirs - 1;
11114 for (i = 0 ; i < 10 ; i++)
11115 q->renamed[i] = EMPTY;
11122 if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) &&
11123 n->ndup.dupfd == fd)
11124 continue; /* redirect from/to same file descriptor */
11126 newfd = openredirect(n);
11129 if (sv && *(p = &sv->renamed[fd]) == EMPTY) {
11130 i = fcntl(fd, F_DUPFD, 10);
11137 error("%d: %m", fd);
11147 dupredirect(n, newfd);
11148 } while ((n = n->nfile.next));
11150 if (flags & REDIR_SAVEFD2 && sv && sv->renamed[2] >= 0)
11151 preverrout_fd = sv->renamed[2];
11156 * Undo the effects of the last redirection.
11162 struct redirtab *rp;
11165 if (--nullredirs >= 0)
11169 for (i = 0 ; i < 10 ; i++) {
11170 if (rp->renamed[i] != EMPTY) {
11173 copyfd(rp->renamed[i], i);
11175 close(rp->renamed[i]);
11178 redirlist = rp->next;
11179 nullredirs = rp->nullredirs;
11185 * Undo all redirections. Called on error or interrupt.
11189 * Discard all saved file descriptors.
11193 clearredir(int drop)
11205 * Copy a file descriptor to be >= to. Returns -1
11206 * if the source file descriptor is closed, EMPTY if there are no unused
11207 * file descriptors left.
11211 copyfd(int from, int to)
11215 newfd = fcntl(from, F_DUPFD, to);
11217 if (errno == EMFILE)
11220 error("%d: %m", from);
11227 redirectsafe(union node *redir, int flags)
11230 volatile int saveint;
11231 struct jmploc *volatile savehandler = handler;
11232 struct jmploc jmploc;
11235 if (!(err = setjmp(jmploc.loc) * 2)) {
11237 redirect(redir, flags);
11239 handler = savehandler;
11240 if (err && exception != EXERROR)
11241 longjmp(handler->loc, 1);
11242 RESTOREINT(saveint);
11246 /* $NetBSD: show.c,v 1.24 2003/01/22 20:36:04 dsl Exp $ */
11249 static void shtree(union node *, int, char *, FILE*);
11250 static void shcmd(union node *, FILE *);
11251 static void sharg(union node *, FILE *);
11252 static void indent(int, char *, FILE *);
11253 static void trstring(char *);
11257 showtree(union node *n)
11259 trputs("showtree called\n");
11260 shtree(n, 1, NULL, stdout);
11265 shtree(union node *n, int ind, char *pfx, FILE *fp)
11267 struct nodelist *lp;
11273 indent(ind, pfx, fp);
11284 shtree(n->nbinary.ch1, ind, NULL, fp);
11287 shtree(n->nbinary.ch2, ind, NULL, fp);
11295 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
11300 if (n->npipe.backgnd)
11306 fprintf(fp, "<node type %d>", n->type);
11315 shcmd(union node *cmd, FILE *fp)
11323 for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
11329 for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
11332 switch (np->nfile.type) {
11333 case NTO: s = ">"; dftfd = 1; break;
11334 case NCLOBBER: s = ">|"; dftfd = 1; break;
11335 case NAPPEND: s = ">>"; dftfd = 1; break;
11336 case NTOFD: s = ">&"; dftfd = 1; break;
11337 case NFROM: s = "<"; dftfd = 0; break;
11338 case NFROMFD: s = "<&"; dftfd = 0; break;
11339 case NFROMTO: s = "<>"; dftfd = 0; break;
11340 default: s = "*error*"; dftfd = 0; break;
11342 if (np->nfile.fd != dftfd)
11343 fprintf(fp, "%d", np->nfile.fd);
11345 if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
11346 fprintf(fp, "%d", np->ndup.dupfd);
11348 sharg(np->nfile.fname, fp);
11357 sharg(union node *arg, FILE *fp)
11360 struct nodelist *bqlist;
11363 if (arg->type != NARG) {
11364 out1fmt("<node type %d>\n", arg->type);
11367 bqlist = arg->narg.backquote;
11368 for (p = arg->narg.text ; *p ; p++) {
11377 if (subtype == VSLENGTH)
11383 if (subtype & VSNUL)
11386 switch (subtype & VSTYPE) {
11405 case VSTRIMLEFTMAX:
11412 case VSTRIMRIGHTMAX:
11419 out1fmt("<subtype %d>", subtype);
11426 case CTLBACKQ|CTLQUOTE:
11429 shtree(bqlist->n, -1, NULL, fp);
11441 indent(int amount, char *pfx, FILE *fp)
11445 for (i = 0 ; i < amount ; i++) {
11446 if (pfx && i == amount - 1)
11467 putc(c, tracefile);
11471 trace(const char *fmt, ...)
11478 (void) vfprintf(tracefile, fmt, va);
11483 tracev(const char *fmt, va_list va)
11487 (void) vfprintf(tracefile, fmt, va);
11492 trputs(const char *s)
11496 fputs(s, tracefile);
11508 putc('"', tracefile);
11509 for (p = s ; *p ; p++) {
11511 case '\n': c = 'n'; goto backslash;
11512 case '\t': c = 't'; goto backslash;
11513 case '\r': c = 'r'; goto backslash;
11514 case '"': c = '"'; goto backslash;
11515 case '\\': c = '\\'; goto backslash;
11516 case CTLESC: c = 'e'; goto backslash;
11517 case CTLVAR: c = 'v'; goto backslash;
11518 case CTLVAR+CTLQUOTE: c = 'V'; goto backslash;
11519 case CTLBACKQ: c = 'q'; goto backslash;
11520 case CTLBACKQ+CTLQUOTE: c = 'Q'; goto backslash;
11521 backslash: putc('\\', tracefile);
11522 putc(c, tracefile);
11525 if (*p >= ' ' && *p <= '~')
11526 putc(*p, tracefile);
11528 putc('\\', tracefile);
11529 putc(*p >> 6 & 03, tracefile);
11530 putc(*p >> 3 & 07, tracefile);
11531 putc(*p & 07, tracefile);
11536 putc('"', tracefile);
11548 putc(' ', tracefile);
11550 putc('\n', tracefile);
11566 /* leave open because libedit might be using it */
11569 scopy("./trace", s);
11571 if (!freopen(s, "a", tracefile)) {
11572 fprintf(stderr, "Can't re-open %s\n", s);
11577 if ((tracefile = fopen(s, "a")) == NULL) {
11578 fprintf(stderr, "Can't open %s\n", s);
11584 if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
11585 fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
11587 setlinebuf(tracefile);
11588 fputs("\nTracing started.\n", tracefile);
11593 /* $NetBSD: trap.c,v 1.28 2002/11/24 22:35:43 christos Exp $ */
11596 * Sigmode records the current value of the signal handlers for the various
11597 * modes. A value of zero means that the current handler is not known.
11598 * S_HARD_IGN indicates that the signal was ignored on entry to the shell,
11601 #define S_DFL 1 /* default signal handling (SIG_DFL) */
11602 #define S_CATCH 2 /* signal is caught */
11603 #define S_IGN 3 /* signal is ignored (SIG_IGN) */
11604 #define S_HARD_IGN 4 /* signal is ignored permenantly */
11605 #define S_RESET 5 /* temporary - to reset a hard ignored sig */
11610 * The trap builtin.
11614 trapcmd(int argc, char **argv)
11623 for (signo = 0 ; signo < NSIG ; signo++) {
11624 if (trap[signo] != NULL) {
11627 sn = u_signal_names(0, &signo, 0);
11630 out1fmt("trap -- %s %s\n",
11631 single_quote(trap[signo]), sn);
11641 if ((signo = decode_signal(*ap, 0)) < 0)
11642 error("%s: bad trap", *ap);
11645 if (action[0] == '-' && action[1] == '\0')
11648 action = savestr(action);
11651 ckfree(trap[signo]);
11652 trap[signo] = action;
11663 * Clear traps on a fork.
11671 for (tp = trap ; tp < &trap[NSIG] ; tp++) {
11672 if (*tp && **tp) { /* trap not NULL or SIG_IGN */
11676 if (tp != &trap[0])
11677 setsignal(tp - trap);
11685 * Set the signal handler for the specified signal. The routine figures
11686 * out what it should be set to.
11690 setsignal(int signo)
11694 struct sigaction act;
11696 if ((t = trap[signo]) == NULL)
11698 else if (*t != '\0')
11702 if (rootshell && action == S_DFL) {
11705 if (iflag || minusc || sflag == 0)
11728 t = &sigmode[signo - 1];
11732 * current setting unknown
11734 if (sigaction(signo, 0, &act) == -1) {
11736 * Pretend it worked; maybe we should give a warning
11737 * here, but other shells don't. We don't alter
11738 * sigmode, so that we retry every time.
11742 if (act.sa_handler == SIG_IGN) {
11743 if (mflag && (signo == SIGTSTP ||
11744 signo == SIGTTIN || signo == SIGTTOU)) {
11745 tsig = S_IGN; /* don't hard ignore these */
11749 tsig = S_RESET; /* force to be set */
11752 if (tsig == S_HARD_IGN || tsig == action)
11756 act.sa_handler = onsig;
11759 act.sa_handler = SIG_IGN;
11762 act.sa_handler = SIG_DFL;
11766 sigfillset(&act.sa_mask);
11767 sigaction(signo, &act, 0);
11775 ignoresig(int signo)
11777 if (sigmode[signo - 1] != S_IGN && sigmode[signo - 1] != S_HARD_IGN) {
11778 signal(signo, SIG_IGN);
11780 sigmode[signo - 1] = S_HARD_IGN;
11791 gotsig[signo - 1] = 1;
11792 pendingsigs = signo;
11794 if (exsig || (signo == SIGINT && !trap[SIGINT])) {
11803 * Called to execute a trap. Perhaps we should avoid entering new trap
11804 * handlers while we are executing a trap handler.
11814 savestatus = exitstatus;
11816 while (pendingsigs = 0, barrier(), (p = memchr(q, 1, NSIG - 1))) {
11818 p = trap[p - q + 1];
11822 exitstatus = savestatus;
11828 * Controls whether the shell is interactive or not.
11832 setinteractive(int on)
11834 static int is_interactive;
11836 if (++on == is_interactive)
11838 is_interactive = on;
11840 setsignal(SIGQUIT);
11841 setsignal(SIGTERM);
11842 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
11843 if(is_interactive > 1) {
11844 /* Looks like they want an interactive shell */
11845 static int do_banner;
11849 "\n\n" BB_BANNER " Built-in shell (ash)\n"
11850 "Enter 'help' for a list of built-in commands.\n\n");
11858 #ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
11859 /*** List the available builtins ***/
11861 static int helpcmd(int argc, char **argv)
11865 out1fmt("\nBuilt-in commands:\n-------------------\n");
11866 for (col = 0, i = 0; i < NUMBUILTINS; i++) {
11867 col += out1fmt("%c%s", ((col == 0) ? '\t' : ' '),
11868 builtincmd[i].name + 1);
11874 #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
11876 extern const struct BB_applet applets[];
11877 extern const size_t NUM_APPLETS;
11879 for (i = 0; i < NUM_APPLETS; i++) {
11881 col += out1fmt("%c%s", ((col == 0) ? '\t' : ' '), applets[i].name);
11890 return EXIT_SUCCESS;
11892 #endif /* CONFIG_FEATURE_SH_EXTRA_QUIET */
11895 * Called to exit the shell.
11906 jmp = setjmp(loc.loc);
11907 status = exitstatus;
11908 TRACE(("pid %d, exitshell(%d)\n", getpid(), status));
11912 if ((p = trap[0]) != NULL && *p != '\0') {
11917 #ifdef CONFIG_FEATURE_COMMAND_SAVEHISTORY
11918 if (iflag && rootshell) {
11919 const char *hp = lookupvar("HISTFILE");
11922 save_history ( hp );
11930 static int decode_signal(const char *string, int minsig)
11933 const char *name = u_signal_names(string, &signo, minsig);
11935 return name ? signo : -1;
11938 /* $NetBSD: var.c,v 1.32 2003/01/22 20:36:04 dsl Exp $ */
11940 static struct var *vartab[VTABSIZE];
11942 static int vpcmp(const void *, const void *);
11943 static struct var **findvar(struct var **, const char *);
11946 * Initialize the variable symbol tables and import the environment
11950 #ifdef CONFIG_ASH_GETOPTS
11952 * Safe version of setvar, returns 1 on success 0 on failure.
11956 setvarsafe(const char *name, const char *val, int flags)
11959 volatile int saveint;
11960 struct jmploc *volatile savehandler = handler;
11961 struct jmploc jmploc;
11964 if (setjmp(jmploc.loc))
11968 setvar(name, val, flags);
11971 handler = savehandler;
11972 RESTOREINT(saveint);
11978 * Set the value of a variable. The flags argument is ored with the
11979 * flags of the variable. If val is NULL, the variable is unset.
11983 setvar(const char *name, const char *val, int flags)
11990 q = endofname(name);
11991 p = strchrnul(q, '=');
11992 namelen = p - name;
11993 if (!namelen || p != q)
11994 error("%.*s: bad variable name", namelen, name);
11999 vallen = strlen(val);
12002 p = mempcpy(nameeq = ckmalloc(namelen + vallen + 2), name, namelen);
12006 p = mempcpy(p, val, vallen);
12009 setvareq(nameeq, flags | VNOSAVE);
12015 * Same as setvar except that the variable and value are passed in
12016 * the first argument as name=value. Since the first argument will
12017 * be actually stored in the table, it should not be a string that
12019 * Called with interrupts off.
12023 setvareq(char *s, int flags)
12025 struct var *vp, **vpp;
12028 flags |= (VEXPORT & (((unsigned) (1 - aflag)) - 1));
12029 vp = *findvar(vpp, s);
12031 if ((vp->flags & (VREADONLY|VDYNAMIC)) == VREADONLY) {
12034 if (flags & VNOSAVE)
12037 error("%.*s: is read only", strchrnul(n, '=') - n, n);
12040 if (flags & VNOSET)
12043 if (vp->func && (flags & VNOFUNC) == 0)
12044 (*vp->func)(strchrnul(s, '=') + 1);
12046 if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
12049 flags |= vp->flags & ~(VTEXTFIXED|VSTACK|VNOSAVE|VUNSET);
12051 if (flags & VNOSET)
12054 vp = ckmalloc(sizeof (*vp));
12059 if (!(flags & (VTEXTFIXED|VSTACK|VNOSAVE)))
12067 * Process a linked list of variable assignments.
12071 listsetvar(struct strlist *list_set_var, int flags)
12073 struct strlist *lp = list_set_var;
12079 setvareq(lp->text, flags);
12080 } while ((lp = lp->next));
12086 * Find the value of a variable. Returns NULL if not set.
12090 lookupvar(const char *name)
12094 if ((v = *findvar(hashvar(name), name))) {
12097 * Dynamic variables are implemented roughly the same way they are
12098 * in bash. Namely, they're "special" so long as they aren't unset.
12099 * As soon as they're unset, they're no longer dynamic, and dynamic
12100 * lookup will no longer happen at that point. -- PFM.
12102 if((v->flags & VDYNAMIC))
12105 if(!(v->flags & VUNSET))
12106 return strchrnul(v->text, '=') + 1;
12114 * Search the environment of a builtin command.
12118 bltinlookup(const char *name)
12120 struct strlist *sp;
12122 for (sp = cmdenviron ; sp ; sp = sp->next) {
12123 if (varequal(sp->text, name))
12124 return strchrnul(sp->text, '=') + 1;
12126 return lookupvar(name);
12131 * Generate a list of variables satisfying the given conditions.
12135 listvars(int on, int off, char ***end)
12146 for (vp = *vpp ; vp ; vp = vp->next)
12147 if ((vp->flags & mask) == on) {
12148 if (ep == stackstrend())
12149 ep = growstackstr();
12150 *ep++ = (char *) vp->text;
12152 } while (++vpp < vartab + VTABSIZE);
12153 if (ep == stackstrend())
12154 ep = growstackstr();
12158 return grabstackstr(ep);
12163 * POSIX requires that 'set' (but not export or readonly) output the
12164 * variables in lexicographic order - by the locale's collating order (sigh).
12165 * Maybe we could keep them in an ordered balanced binary tree
12166 * instead of hashed lists.
12167 * For now just roll 'em through qsort for printing...
12171 showvars(const char *sep_prefix, int on, int off)
12174 char **ep, **epend;
12176 ep = listvars(on, off, &epend);
12177 qsort(ep, epend - ep, sizeof(char *), vpcmp);
12179 sep = *sep_prefix ? spcstr : sep_prefix;
12181 for (; ep < epend; ep++) {
12185 p = strchrnul(*ep, '=');
12188 q = single_quote(++p);
12190 out1fmt("%s%s%.*s%s\n", sep_prefix, sep, (int)(p - *ep), *ep, q);
12199 * The export and readonly commands.
12203 exportcmd(int argc, char **argv)
12209 int flag = argv[0][0] == 'r'? VREADONLY : VEXPORT;
12212 notp = nextopt("p") - 'p';
12213 if (notp && ((name = *(aptr = argptr)))) {
12215 if ((p = strchr(name, '=')) != NULL) {
12218 if ((vp = *findvar(hashvar(name), name))) {
12223 setvar(name, p, flag);
12224 } while ((name = *++aptr) != NULL);
12226 showvars(argv[0], flag, 0);
12233 * Make a variable a local variable. When a variable is made local, it's
12234 * value and flags are saved in a localvar structure. The saved values
12235 * will be restored when the shell function returns. We handle the name
12236 * "-" as a special case.
12240 mklocal(char *name)
12242 struct localvar *lvp;
12247 lvp = ckmalloc(sizeof (struct localvar));
12248 if (name[0] == '-' && name[1] == '\0') {
12250 p = ckmalloc(sizeof(optlist));
12251 lvp->text = memcpy(p, optlist, sizeof(optlist));
12256 vpp = hashvar(name);
12257 vp = *findvar(vpp, name);
12258 eq = strchr(name, '=');
12261 setvareq(name, VSTRFIXED);
12263 setvar(name, NULL, VSTRFIXED);
12264 vp = *vpp; /* the new variable */
12265 lvp->flags = VUNSET;
12267 lvp->text = vp->text;
12268 lvp->flags = vp->flags;
12269 vp->flags |= VSTRFIXED|VTEXTFIXED;
12275 lvp->next = localvars;
12281 * The "local" command.
12285 localcmd(int argc, char **argv)
12290 while ((name = *argv++) != NULL) {
12298 * Called after a function returns.
12299 * Interrupts must be off.
12305 struct localvar *lvp;
12308 while ((lvp = localvars) != NULL) {
12309 localvars = lvp->next;
12311 TRACE(("poplocalvar %s", vp ? vp->text : "-"));
12312 if (vp == NULL) { /* $- saved */
12313 memcpy(optlist, lvp->text, sizeof(optlist));
12316 } else if ((lvp->flags & (VUNSET|VSTRFIXED)) == VUNSET) {
12317 unsetvar(vp->text);
12320 (*vp->func)(strchrnul(lvp->text, '=') + 1);
12321 if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
12323 vp->flags = lvp->flags;
12324 vp->text = lvp->text;
12332 * The unset builtin command. We unset the function before we unset the
12333 * variable to allow a function to be unset when there is a readonly variable
12334 * with the same name.
12338 unsetcmd(int argc, char **argv)
12345 while ((i = nextopt("vf")) != '\0') {
12349 for (ap = argptr; *ap ; ap++) {
12364 * Unset the specified variable.
12368 unsetvar(const char *s)
12374 vpp = findvar(hashvar(s), s);
12378 int flags = vp->flags;
12381 if (flags & VREADONLY)
12384 vp->flags &= ~VDYNAMIC;
12386 if (flags & VUNSET)
12388 if ((flags & VSTRFIXED) == 0) {
12390 if ((flags & (VTEXTFIXED|VSTACK)) == 0)
12397 vp->flags &= ~VEXPORT;
12410 * Find the appropriate entry in the hash table from the name.
12413 static struct var **
12414 hashvar(const char *p)
12416 unsigned int hashval;
12418 hashval = ((unsigned char) *p) << 4;
12419 while (*p && *p != '=')
12420 hashval += (unsigned char) *p++;
12421 return &vartab[hashval % VTABSIZE];
12427 * Compares two strings up to the first = or '\0'. The first
12428 * string must be terminated by '='; the second may be terminated by
12429 * either '=' or '\0'.
12433 varcmp(const char *p, const char *q)
12437 while ((c = *p) == (d = *q)) {
12438 if (!c || c == '=')
12452 vpcmp(const void *a, const void *b)
12454 return varcmp(*(const char **)a, *(const char **)b);
12457 static struct var **
12458 findvar(struct var **vpp, const char *name)
12460 for (; *vpp; vpp = &(*vpp)->next) {
12461 if (varequal((*vpp)->text, name)) {
12467 /* $NetBSD: setmode.c,v 1.29 2003/01/15 23:58:03 kleink Exp $ */
12469 #include <sys/times.h>
12471 static const unsigned char timescmd_str[] = {
12472 ' ', offsetof(struct tms, tms_utime),
12473 '\n', offsetof(struct tms, tms_stime),
12474 ' ', offsetof(struct tms, tms_cutime),
12475 '\n', offsetof(struct tms, tms_cstime),
12479 static int timescmd(int ac, char **av)
12481 long int clk_tck, s, t;
12482 const unsigned char *p;
12485 clk_tck = sysconf(_SC_CLK_TCK);
12490 t = *(clock_t *)(((char *) &buf) + p[1]);
12492 out1fmt("%ldm%ld.%.3lds%c",
12494 ((t - s * clk_tck) * 1000) / clk_tck,
12496 } while (*(p += 2));
12501 #ifdef CONFIG_ASH_MATH_SUPPORT
12503 dash_arith(const char *s)
12509 result = arith(s, &errcode);
12512 error("exponent less than 0");
12513 else if (errcode == -2)
12514 error("divide by zero");
12515 else if (errcode == -5)
12516 error("expression recursion loop detected");
12527 * The let builtin. partial stolen from GNU Bash, the Bourne Again SHell.
12528 * Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
12530 * Copyright (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
12534 letcmd(int argc, char **argv)
12541 error("expression expected");
12542 for (ap = argv + 1; *ap; ap++) {
12543 i = dash_arith(*ap);
12548 #endif /* CONFIG_ASH_MATH_SUPPORT */
12550 /* $NetBSD: miscbltin.c,v 1.31 2002/11/24 22:35:41 christos Exp $ */
12553 * Miscellaneous builtins.
12559 #if __GLIBC__ == 2 && __GLIBC_MINOR__ < 1
12560 typedef enum __rlimit_resource rlim_t;
12566 * The read builtin. The -e option causes backslashes to escape the
12567 * following character.
12569 * This uses unbuffered input, which may be avoidable in some cases.
12573 readcmd(int argc, char **argv)
12588 while ((i = nextopt("p:r")) != '\0') {
12590 prompt = optionarg;
12594 if (prompt && isatty(0)) {
12597 if (*(ap = argptr) == NULL)
12598 error("arg count");
12599 if ((ifs = bltinlookup("IFS")) == NULL)
12606 if (read(0, &c, 1) != 1) {
12618 if (!rflag && c == '\\') {
12624 if (startword && *ifs == ' ' && strchr(ifs, c)) {
12628 if (ap[1] != NULL && strchr(ifs, c) != NULL) {
12630 setvar(*ap, stackblock(), 0);
12640 /* Remove trailing blanks */
12641 while ((char *)stackblock() <= --p && strchr(ifs, *p) != NULL)
12643 setvar(*ap, stackblock(), 0);
12644 while (*++ap != NULL)
12645 setvar(*ap, nullstr, 0);
12650 static int umaskcmd(int argc, char **argv)
12652 static const char permuser[3] = "ugo";
12653 static const char permmode[3] = "rwx";
12654 static const short int permmask[] = {
12655 S_IRUSR, S_IWUSR, S_IXUSR,
12656 S_IRGRP, S_IWGRP, S_IXGRP,
12657 S_IROTH, S_IWOTH, S_IXOTH
12663 int symbolic_mode = 0;
12665 while (nextopt("S") != '\0') {
12674 if ((ap = *argptr) == NULL) {
12675 if (symbolic_mode) {
12679 for (i = 0; i < 3; i++) {
12682 *p++ = permuser[i];
12684 for (j = 0; j < 3; j++) {
12685 if ((mask & permmask[3 * i + j]) == 0) {
12686 *p++ = permmode[j];
12694 out1fmt("%.4o\n", mask);
12697 if (is_digit((unsigned char) *ap)) {
12700 if (*ap >= '8' || *ap < '0')
12701 error(illnum, argv[1]);
12702 mask = (mask << 3) + (*ap - '0');
12703 } while (*++ap != '\0');
12706 mask = ~mask & 0777;
12707 if (!bb_parse_mode(ap, &mask)) {
12708 error("Illegal mode: %s", ap);
12710 umask(~mask & 0777);
12719 * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
12720 * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
12721 * ash by J.T. Conklin.
12729 int factor; /* multiply by to get rlim_{cur,max} values */
12733 static const struct limits limits[] = {
12735 { "time(seconds)", RLIMIT_CPU, 1, 't' },
12737 #ifdef RLIMIT_FSIZE
12738 { "file(blocks)", RLIMIT_FSIZE, 512, 'f' },
12741 { "data(kbytes)", RLIMIT_DATA, 1024, 'd' },
12743 #ifdef RLIMIT_STACK
12744 { "stack(kbytes)", RLIMIT_STACK, 1024, 's' },
12747 { "coredump(blocks)", RLIMIT_CORE, 512, 'c' },
12750 { "memory(kbytes)", RLIMIT_RSS, 1024, 'm' },
12752 #ifdef RLIMIT_MEMLOCK
12753 { "locked memory(kbytes)", RLIMIT_MEMLOCK, 1024, 'l' },
12755 #ifdef RLIMIT_NPROC
12756 { "process", RLIMIT_NPROC, 1, 'p' },
12758 #ifdef RLIMIT_NOFILE
12759 { "nofiles", RLIMIT_NOFILE, 1, 'n' },
12762 { "vmemory(kbytes)", RLIMIT_AS, 1024, 'v' },
12764 #ifdef RLIMIT_LOCKS
12765 { "locks", RLIMIT_LOCKS, 1, 'w' },
12767 { (char *) 0, 0, 0, '\0' }
12770 enum limtype { SOFT = 0x1, HARD = 0x2 };
12772 static void printlim(enum limtype how, const struct rlimit *limit,
12773 const struct limits *l)
12777 val = limit->rlim_max;
12779 val = limit->rlim_cur;
12781 if (val == RLIM_INFINITY)
12782 out1fmt("unlimited\n");
12785 out1fmt("%lld\n", (long long) val);
12790 ulimitcmd(int argc, char **argv)
12794 enum limtype how = SOFT | HARD;
12795 const struct limits *l;
12798 struct rlimit limit;
12801 while ((optc = nextopt("HSa"
12805 #ifdef RLIMIT_FSIZE
12811 #ifdef RLIMIT_STACK
12820 #ifdef RLIMIT_MEMLOCK
12823 #ifdef RLIMIT_NPROC
12826 #ifdef RLIMIT_NOFILE
12832 #ifdef RLIMIT_LOCKS
12850 for (l = limits; l->option != what; l++)
12853 set = *argptr ? 1 : 0;
12857 if (all || argptr[1])
12858 error("too many arguments");
12859 if (strncmp(p, "unlimited\n", 9) == 0)
12860 val = RLIM_INFINITY;
12864 while ((c = *p++) >= '0' && c <= '9')
12866 val = (val * 10) + (long)(c - '0');
12867 if (val < (rlim_t) 0)
12871 error("bad number");
12876 for (l = limits; l->name; l++) {
12877 getrlimit(l->cmd, &limit);
12878 out1fmt("%-20s ", l->name);
12879 printlim(how, &limit, l);
12884 getrlimit(l->cmd, &limit);
12887 limit.rlim_max = val;
12889 limit.rlim_cur = val;
12890 if (setrlimit(l->cmd, &limit) < 0)
12891 error("error setting limit (%m)");
12893 printlim(how, &limit, l);
12899 #ifdef CONFIG_ASH_MATH_SUPPORT
12901 /* Copyright (c) 2001 Aaron Lehmann <aaronl@vitelus.com>
12903 Permission is hereby granted, free of charge, to any person obtaining
12904 a copy of this software and associated documentation files (the
12905 "Software"), to deal in the Software without restriction, including
12906 without limitation the rights to use, copy, modify, merge, publish,
12907 distribute, sublicense, and/or sell copies of the Software, and to
12908 permit persons to whom the Software is furnished to do so, subject to
12909 the following conditions:
12911 The above copyright notice and this permission notice shall be
12912 included in all copies or substantial portions of the Software.
12914 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
12915 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
12916 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
12917 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
12918 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
12919 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
12920 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
12923 /* This is my infix parser/evaluator. It is optimized for size, intended
12924 * as a replacement for yacc-based parsers. However, it may well be faster
12925 * than a comparable parser written in yacc. The supported operators are
12926 * listed in #defines below. Parens, order of operations, and error handling
12927 * are supported. This code is thread safe. The exact expression format should
12928 * be that which POSIX specifies for shells. */
12930 /* The code uses a simple two-stack algorithm. See
12931 * http://www.onthenet.com.au/~grahamis/int2008/week02/lect02.html
12932 * for a detailed explanation of the infix-to-postfix algorithm on which
12933 * this is based (this code differs in that it applies operators immediately
12934 * to the stack instead of adding them to a queue to end up with an
12937 /* To use the routine, call it with an expression string and error return
12941 * Aug 24, 2001 Manuel Novoa III
12943 * Reduced the generated code size by about 30% (i386) and fixed several bugs.
12945 * 1) In arith_apply():
12946 * a) Cached values of *numptr and &(numptr[-1]).
12947 * b) Removed redundant test for zero denominator.
12950 * a) Eliminated redundant code for processing operator tokens by moving
12951 * to a table-based implementation. Also folded handling of parens
12953 * b) Combined all 3 loops which called arith_apply to reduce generated
12954 * code size at the cost of speed.
12956 * 3) The following expressions were treated as valid by the original code:
12957 * 1() , 0! , 1 ( *3 ) .
12958 * These bugs have been fixed by internally enclosing the expression in
12959 * parens and then checking that all binary ops and right parens are
12960 * preceded by a valid expression (NUM_TOKEN).
12962 * Note: It may be desirable to replace Aaron's test for whitespace with
12963 * ctype's isspace() if it is used by another busybox applet or if additional
12964 * whitespace chars should be considered. Look below the "#include"s for a
12965 * precompiler test.
12969 * Aug 26, 2001 Manuel Novoa III
12971 * Return 0 for null expressions. Pointed out by Vladimir Oleynik.
12973 * Merge in Aaron's comments previously posted to the busybox list,
12974 * modified slightly to take account of my changes to the code.
12979 * (C) 2003 Vladimir Oleynik <dzo@simtreas.ru>
12981 * - allow access to variable,
12982 * used recursive find value indirection (c=2*2; a="c"; $((a+=2)) produce 6)
12983 * - realize assign syntax (VAR=expr, +=, *= etc)
12984 * - realize exponentiation (** operator)
12985 * - realize comma separated - expr, expr
12986 * - realise ++expr --expr expr++ expr--
12987 * - realise expr ? expr : expr (but, second expr calculate always)
12988 * - allow hexadecimal and octal numbers
12989 * - was restored loses XOR operator
12990 * - remove one goto label, added three ;-)
12991 * - protect $((num num)) as true zero expr (Manuel`s error)
12992 * - always use special isspace(), see comment from bash ;-)
12996 #define arith_isspace(arithval) \
12997 (arithval == ' ' || arithval == '\n' || arithval == '\t')
13000 typedef unsigned char operator;
13002 /* An operator's token id is a bit of a bitfield. The lower 5 bits are the
13003 * precedence, and 3 high bits are an ID unique across operators of that
13004 * precedence. The ID portion is so that multiple operators can have the
13005 * same precedence, ensuring that the leftmost one is evaluated first.
13006 * Consider * and /. */
13008 #define tok_decl(prec,id) (((id)<<5)|(prec))
13009 #define PREC(op) ((op) & 0x1F)
13011 #define TOK_LPAREN tok_decl(0,0)
13013 #define TOK_COMMA tok_decl(1,0)
13015 #define TOK_ASSIGN tok_decl(2,0)
13016 #define TOK_AND_ASSIGN tok_decl(2,1)
13017 #define TOK_OR_ASSIGN tok_decl(2,2)
13018 #define TOK_XOR_ASSIGN tok_decl(2,3)
13019 #define TOK_PLUS_ASSIGN tok_decl(2,4)
13020 #define TOK_MINUS_ASSIGN tok_decl(2,5)
13021 #define TOK_LSHIFT_ASSIGN tok_decl(2,6)
13022 #define TOK_RSHIFT_ASSIGN tok_decl(2,7)
13024 #define TOK_MUL_ASSIGN tok_decl(3,0)
13025 #define TOK_DIV_ASSIGN tok_decl(3,1)
13026 #define TOK_REM_ASSIGN tok_decl(3,2)
13028 /* all assign is right associativity and precedence eq, but (7+3)<<5 > 256 */
13029 #define convert_prec_is_assing(prec) do { if(prec == 3) prec = 2; } while(0)
13031 /* conditional is right associativity too */
13032 #define TOK_CONDITIONAL tok_decl(4,0)
13033 #define TOK_CONDITIONAL_SEP tok_decl(4,1)
13035 #define TOK_OR tok_decl(5,0)
13037 #define TOK_AND tok_decl(6,0)
13039 #define TOK_BOR tok_decl(7,0)
13041 #define TOK_BXOR tok_decl(8,0)
13043 #define TOK_BAND tok_decl(9,0)
13045 #define TOK_EQ tok_decl(10,0)
13046 #define TOK_NE tok_decl(10,1)
13048 #define TOK_LT tok_decl(11,0)
13049 #define TOK_GT tok_decl(11,1)
13050 #define TOK_GE tok_decl(11,2)
13051 #define TOK_LE tok_decl(11,3)
13053 #define TOK_LSHIFT tok_decl(12,0)
13054 #define TOK_RSHIFT tok_decl(12,1)
13056 #define TOK_ADD tok_decl(13,0)
13057 #define TOK_SUB tok_decl(13,1)
13059 #define TOK_MUL tok_decl(14,0)
13060 #define TOK_DIV tok_decl(14,1)
13061 #define TOK_REM tok_decl(14,2)
13063 /* exponent is right associativity */
13064 #define TOK_EXPONENT tok_decl(15,1)
13066 /* For now unary operators. */
13067 #define UNARYPREC 16
13068 #define TOK_BNOT tok_decl(UNARYPREC,0)
13069 #define TOK_NOT tok_decl(UNARYPREC,1)
13071 #define TOK_UMINUS tok_decl(UNARYPREC+1,0)
13072 #define TOK_UPLUS tok_decl(UNARYPREC+1,1)
13074 #define PREC_PRE (UNARYPREC+2)
13076 #define TOK_PRE_INC tok_decl(PREC_PRE, 0)
13077 #define TOK_PRE_DEC tok_decl(PREC_PRE, 1)
13079 #define PREC_POST (UNARYPREC+3)
13081 #define TOK_POST_INC tok_decl(PREC_POST, 0)
13082 #define TOK_POST_DEC tok_decl(PREC_POST, 1)
13084 #define SPEC_PREC (UNARYPREC+4)
13086 #define TOK_NUM tok_decl(SPEC_PREC, 0)
13087 #define TOK_RPAREN tok_decl(SPEC_PREC, 1)
13089 #define NUMPTR (*numstackptr)
13091 static inline int tok_have_assign(operator op)
13093 operator prec = PREC(op);
13095 convert_prec_is_assing(prec);
13096 return (prec == PREC(TOK_ASSIGN) ||
13097 prec == PREC_PRE || prec == PREC_POST);
13100 static inline int is_right_associativity(operator prec)
13102 return (prec == PREC(TOK_ASSIGN) || prec == PREC(TOK_EXPONENT) ||
13103 prec == PREC(TOK_CONDITIONAL));
13107 typedef struct ARITCH_VAR_NUM {
13109 arith_t contidional_second_val;
13110 char contidional_second_val_initialized;
13111 char *var; /* if NULL then is regular number,
13112 else is variable name */
13116 typedef struct CHK_VAR_RECURSIVE_LOOPED {
13118 struct CHK_VAR_RECURSIVE_LOOPED *next;
13119 } chk_var_recursive_looped_t;
13121 static chk_var_recursive_looped_t *prev_chk_var_recursive;
13124 static int arith_lookup_val(v_n_t *t)
13127 const char * p = lookupvar(t->var);
13132 /* recursive try as expression */
13133 chk_var_recursive_looped_t *cur;
13134 chk_var_recursive_looped_t cur_save;
13136 for(cur = prev_chk_var_recursive; cur; cur = cur->next) {
13137 if(strcmp(cur->var, t->var) == 0) {
13138 /* expression recursion loop detected */
13142 /* save current lookuped var name */
13143 cur = prev_chk_var_recursive;
13144 cur_save.var = t->var;
13145 cur_save.next = cur;
13146 prev_chk_var_recursive = &cur_save;
13148 t->val = arith (p, &errcode);
13149 /* restore previous ptr after recursiving */
13150 prev_chk_var_recursive = cur;
13153 /* allow undefined var as 0 */
13160 /* "applying" a token means performing it on the top elements on the integer
13161 * stack. For a unary operator it will only change the top element, but a
13162 * binary operator will pop two arguments and push a result */
13164 arith_apply(operator op, v_n_t *numstack, v_n_t **numstackptr)
13167 arith_t numptr_val, rez;
13168 int ret_arith_lookup_val;
13170 if (NUMPTR == numstack) goto err; /* There is no operator that can work
13171 without arguments */
13172 numptr_m1 = NUMPTR - 1;
13174 /* check operand is var with noninteger value */
13175 ret_arith_lookup_val = arith_lookup_val(numptr_m1);
13176 if(ret_arith_lookup_val)
13177 return ret_arith_lookup_val;
13179 rez = numptr_m1->val;
13180 if (op == TOK_UMINUS)
13182 else if (op == TOK_NOT)
13184 else if (op == TOK_BNOT)
13186 else if (op == TOK_POST_INC || op == TOK_PRE_INC)
13188 else if (op == TOK_POST_DEC || op == TOK_PRE_DEC)
13190 else if (op != TOK_UPLUS) {
13191 /* Binary operators */
13193 /* check and binary operators need two arguments */
13194 if (numptr_m1 == numstack) goto err;
13196 /* ... and they pop one */
13199 if (op == TOK_CONDITIONAL) {
13200 if(! numptr_m1->contidional_second_val_initialized) {
13201 /* protect $((expr1 ? expr2)) without ": expr" */
13204 rez = numptr_m1->contidional_second_val;
13205 } else if(numptr_m1->contidional_second_val_initialized) {
13206 /* protect $((expr1 : expr2)) without "expr ? " */
13209 numptr_m1 = NUMPTR - 1;
13210 if(op != TOK_ASSIGN) {
13211 /* check operand is var with noninteger value for not '=' */
13212 ret_arith_lookup_val = arith_lookup_val(numptr_m1);
13213 if(ret_arith_lookup_val)
13214 return ret_arith_lookup_val;
13216 if (op == TOK_CONDITIONAL) {
13217 numptr_m1->contidional_second_val = rez;
13219 rez = numptr_m1->val;
13220 if (op == TOK_BOR || op == TOK_OR_ASSIGN)
13222 else if (op == TOK_OR)
13223 rez = numptr_val || rez;
13224 else if (op == TOK_BAND || op == TOK_AND_ASSIGN)
13226 else if (op == TOK_BXOR || op == TOK_XOR_ASSIGN)
13228 else if (op == TOK_AND)
13229 rez = rez && numptr_val;
13230 else if (op == TOK_EQ)
13231 rez = (rez == numptr_val);
13232 else if (op == TOK_NE)
13233 rez = (rez != numptr_val);
13234 else if (op == TOK_GE)
13235 rez = (rez >= numptr_val);
13236 else if (op == TOK_RSHIFT || op == TOK_RSHIFT_ASSIGN)
13237 rez >>= numptr_val;
13238 else if (op == TOK_LSHIFT || op == TOK_LSHIFT_ASSIGN)
13239 rez <<= numptr_val;
13240 else if (op == TOK_GT)
13241 rez = (rez > numptr_val);
13242 else if (op == TOK_LT)
13243 rez = (rez < numptr_val);
13244 else if (op == TOK_LE)
13245 rez = (rez <= numptr_val);
13246 else if (op == TOK_MUL || op == TOK_MUL_ASSIGN)
13248 else if (op == TOK_ADD || op == TOK_PLUS_ASSIGN)
13250 else if (op == TOK_SUB || op == TOK_MINUS_ASSIGN)
13252 else if (op == TOK_ASSIGN || op == TOK_COMMA)
13254 else if (op == TOK_CONDITIONAL_SEP) {
13255 if (numptr_m1 == numstack) {
13256 /* protect $((expr : expr)) without "expr ? " */
13259 numptr_m1->contidional_second_val_initialized = op;
13260 numptr_m1->contidional_second_val = numptr_val;
13262 else if (op == TOK_CONDITIONAL) {
13264 numptr_val : numptr_m1->contidional_second_val;
13266 else if(op == TOK_EXPONENT) {
13268 return -3; /* exponent less than 0 */
13273 while(numptr_val--)
13278 else if(numptr_val==0) /* zero divisor check */
13280 else if (op == TOK_DIV || op == TOK_DIV_ASSIGN)
13282 else if (op == TOK_REM || op == TOK_REM_ASSIGN)
13285 if(tok_have_assign(op)) {
13288 if(numptr_m1->var == NULL) {
13292 /* save to shell variable */
13293 sprintf(buf, "%lld", (long long) rez);
13294 setvar(numptr_m1->var, buf, 0);
13295 /* after saving, make previous value for v++ or v-- */
13296 if(op == TOK_POST_INC)
13298 else if(op == TOK_POST_DEC)
13301 numptr_m1->val = rez;
13302 /* protect geting var value, is number now */
13303 numptr_m1->var = NULL;
13308 /* longest must first */
13309 static const char op_tokens[] = {
13310 '<','<','=',0, TOK_LSHIFT_ASSIGN,
13311 '>','>','=',0, TOK_RSHIFT_ASSIGN,
13312 '<','<', 0, TOK_LSHIFT,
13313 '>','>', 0, TOK_RSHIFT,
13314 '|','|', 0, TOK_OR,
13315 '&','&', 0, TOK_AND,
13316 '!','=', 0, TOK_NE,
13317 '<','=', 0, TOK_LE,
13318 '>','=', 0, TOK_GE,
13319 '=','=', 0, TOK_EQ,
13320 '|','=', 0, TOK_OR_ASSIGN,
13321 '&','=', 0, TOK_AND_ASSIGN,
13322 '*','=', 0, TOK_MUL_ASSIGN,
13323 '/','=', 0, TOK_DIV_ASSIGN,
13324 '%','=', 0, TOK_REM_ASSIGN,
13325 '+','=', 0, TOK_PLUS_ASSIGN,
13326 '-','=', 0, TOK_MINUS_ASSIGN,
13327 '-','-', 0, TOK_POST_DEC,
13328 '^','=', 0, TOK_XOR_ASSIGN,
13329 '+','+', 0, TOK_POST_INC,
13330 '*','*', 0, TOK_EXPONENT,
13334 '=', 0, TOK_ASSIGN,
13346 '?', 0, TOK_CONDITIONAL,
13347 ':', 0, TOK_CONDITIONAL_SEP,
13348 ')', 0, TOK_RPAREN,
13349 '(', 0, TOK_LPAREN,
13353 #define endexpression &op_tokens[sizeof(op_tokens)-7]
13356 static arith_t arith (const char *expr, int *perrcode)
13358 register char arithval; /* Current character under analysis */
13359 operator lasttok, op;
13362 const char *p = endexpression;
13365 size_t datasizes = strlen(expr) + 2;
13367 /* Stack of integers */
13368 /* The proof that there can be no more than strlen(startbuf)/2+1 integers
13369 * in any given correct or incorrect expression is left as an exercise to
13371 v_n_t *numstack = alloca(((datasizes)/2)*sizeof(v_n_t)),
13372 *numstackptr = numstack;
13373 /* Stack of operator tokens */
13374 operator *stack = alloca((datasizes) * sizeof(operator)),
13377 *stackptr++ = lasttok = TOK_LPAREN; /* start off with a left paren */
13378 *perrcode = errcode = 0;
13381 if ((arithval = *expr) == 0) {
13382 if (p == endexpression) {
13383 /* Null expression. */
13387 /* This is only reached after all tokens have been extracted from the
13388 * input stream. If there are still tokens on the operator stack, they
13389 * are to be applied in order. At the end, there should be a final
13390 * result on the integer stack */
13392 if (expr != endexpression + 1) {
13393 /* If we haven't done so already, */
13394 /* append a closing right paren */
13395 expr = endexpression;
13396 /* and let the loop process it. */
13399 /* At this point, we're done with the expression. */
13400 if (numstackptr != numstack+1) {
13401 /* ... but if there isn't, it's bad */
13403 return (*perrcode = -1);
13405 if(numstack->var) {
13406 /* expression is $((var)) only, lookup now */
13407 errcode = arith_lookup_val(numstack);
13410 *perrcode = errcode;
13411 return numstack->val;
13413 /* Continue processing the expression. */
13414 if (arith_isspace(arithval)) {
13415 /* Skip whitespace */
13418 if((p = endofname(expr)) != expr) {
13419 int var_name_size = (p-expr) + 1; /* trailing zero */
13421 numstackptr->var = alloca(var_name_size);
13422 safe_strncpy(numstackptr->var, expr, var_name_size);
13425 numstackptr->contidional_second_val_initialized = 0;
13429 } else if (is_digit(arithval)) {
13430 numstackptr->var = NULL;
13431 numstackptr->val = strtol(expr, (char **) &expr, 0);
13434 for(p = op_tokens; ; p++) {
13438 /* strange operator not found */
13441 for(o = expr; *p && *o == *p; p++)
13448 /* skip tail uncompared token */
13451 /* skip zero delim */
13456 /* post grammar: a++ reduce to num */
13457 if(lasttok == TOK_POST_INC || lasttok == TOK_POST_DEC)
13460 /* Plus and minus are binary (not unary) _only_ if the last
13461 * token was as number, or a right paren (which pretends to be
13462 * a number, since it evaluates to one). Think about it.
13463 * It makes sense. */
13464 if (lasttok != TOK_NUM) {
13480 /* We don't want a unary operator to cause recursive descent on the
13481 * stack, because there can be many in a row and it could cause an
13482 * operator to be evaluated before its argument is pushed onto the
13483 * integer stack. */
13484 /* But for binary operators, "apply" everything on the operator
13485 * stack until we find an operator with a lesser priority than the
13486 * one we have just extracted. */
13487 /* Left paren is given the lowest priority so it will never be
13488 * "applied" in this way.
13489 * if associativity is right and priority eq, applied also skip
13492 if ((prec > 0 && prec < UNARYPREC) || prec == SPEC_PREC) {
13493 /* not left paren or unary */
13494 if (lasttok != TOK_NUM) {
13495 /* binary op must be preceded by a num */
13498 while (stackptr != stack) {
13499 if (op == TOK_RPAREN) {
13500 /* The algorithm employed here is simple: while we don't
13501 * hit an open paren nor the bottom of the stack, pop
13502 * tokens and apply them */
13503 if (stackptr[-1] == TOK_LPAREN) {
13505 /* Any operator directly after a */
13507 /* close paren should consider itself binary */
13511 operator prev_prec = PREC(stackptr[-1]);
13513 convert_prec_is_assing(prec);
13514 convert_prec_is_assing(prev_prec);
13515 if (prev_prec < prec)
13517 /* check right assoc */
13518 if(prev_prec == prec && is_right_associativity(prec))
13521 errcode = arith_apply(*--stackptr, numstack, &numstackptr);
13522 if(errcode) goto ret;
13524 if (op == TOK_RPAREN) {
13529 /* Push this operator to the stack and remember it. */
13530 *stackptr++ = lasttok = op;
13537 #endif /* CONFIG_ASH_MATH_SUPPORT */
13541 const char *bb_applet_name = "debug stuff usage";
13542 int main(int argc, char **argv)
13544 return ash_main(argc, argv);
13549 * Copyright (c) 1989, 1991, 1993, 1994
13550 * The Regents of the University of California. All rights reserved.
13552 * This code is derived from software contributed to Berkeley by
13553 * Kenneth Almquist.
13555 * Redistribution and use in source and binary forms, with or without
13556 * modification, are permitted provided that the following conditions
13558 * 1. Redistributions of source code must retain the above copyright
13559 * notice, this list of conditions and the following disclaimer.
13560 * 2. Redistributions in binary form must reproduce the above copyright
13561 * notice, this list of conditions and the following disclaimer in the
13562 * documentation and/or other materials provided with the distribution.
13564 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
13565 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
13567 * 4. Neither the name of the University nor the names of its contributors
13568 * may be used to endorse or promote products derived from this software
13569 * without specific prior written permission.
13571 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
13572 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
13573 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
13574 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
13575 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
13576 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
13577 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
13578 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
13579 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
13580 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF