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1/*-
2 * Copyright (c) 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kenneth Almquist.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37/* $NetBSD: alias.h,v 1.4 1995/05/11 21:28:42 christos Exp $ */
38
39#define ALIASINUSE 1
40#define ALIASDEAD 2
41
42struct alias {
43 struct alias *next;
44 char *name;
45 char *val;
46 int flag;
47};
48
49struct alias *lookupalias __P((const char *, int));
50static int aliascmd __P((int, char **));
51static int unaliascmd __P((int, char **));
52static void rmaliases __P((void));
53static int unalias __P((char *));
54static void printalias __P((const struct alias *));
55#define ARITH_NUM 257
56#define ARITH_LPAREN 258
57#define ARITH_RPAREN 259
58#define ARITH_OR 260
59#define ARITH_AND 261
60#define ARITH_BOR 262
61#define ARITH_BXOR 263
62#define ARITH_BAND 264
63#define ARITH_EQ 265
64#define ARITH_NE 266
65#define ARITH_LT 267
66#define ARITH_GT 268
67#define ARITH_GE 269
68#define ARITH_LE 270
69#define ARITH_LSHIFT 271
70#define ARITH_RSHIFT 272
71#define ARITH_ADD 273
72#define ARITH_SUB 274
73#define ARITH_MUL 275
74#define ARITH_DIV 276
75#define ARITH_REM 277
76#define ARITH_UNARYMINUS 278
77#define ARITH_UNARYPLUS 279
78#define ARITH_NOT 280
79#define ARITH_BNOT 281
80
81/*
82 * This file was generated by the mkbuiltins program.
83 */
84
85
86#define BUILTIN_SPECIAL 0x1
87#define BUILTIN_REGULAR 0x2
88#define BUILTIN_ASSIGN 0x4
89
90struct builtincmd {
91 const char *name;
92 int (*const builtinfunc) __P((int, char **));
93 unsigned flags;
94};
95
96extern const struct builtincmd builtincmds[];
97
98
99
100/* $NetBSD: cd.h,v 1.2 1997/07/04 21:01:52 christos Exp $ */
101static int cdcmd __P((int, char **));
102static int pwdcmd __P((int, char **));
103static void setpwd __P((const char *, int));
104
105
106/* $NetBSD: error.h,v 1.14 2001/02/04 19:52:06 christos Exp $ */
107
108/*
109 * Types of operations (passed to the errmsg routine).
110 */
111
112#define E_OPEN 01 /* opening a file */
113#define E_CREAT 02 /* creating a file */
114#define E_EXEC 04 /* executing a program */
115
116
117/*
118 * We enclose jmp_buf in a structure so that we can declare pointers to
119 * jump locations. The global variable handler contains the location to
120 * jump to when an exception occurs, and the global variable exception
121 * contains a code identifying the exeception. To implement nested
122 * exception handlers, the user should save the value of handler on entry
123 * to an inner scope, set handler to point to a jmploc structure for the
124 * inner scope, and restore handler on exit from the scope.
125 */
126
127struct jmploc {
128 jmp_buf loc;
129};
130
131extern struct jmploc *handler;
132extern int exception;
133
134/* exceptions */
135#define EXINT 0 /* SIGINT received */
136#define EXERROR 1 /* a generic error */
137#define EXSHELLPROC 2 /* execute a shell procedure */
138#define EXEXEC 3 /* command execution failed */
139
140
141/*
142 * These macros allow the user to suspend the handling of interrupt signals
143 * over a period of time. This is similar to SIGHOLD to or sigblock, but
144 * much more efficient and portable. (But hacking the kernel is so much
145 * more fun than worrying about efficiency and portability. :-))
146 */
147
148extern int suppressint;
149extern volatile int intpending;
150
151#define INTOFF suppressint++
152#ifdef REALLY_SMALL
153static void __inton __P((void));
154#define INTON __inton()
155#else
156#define INTON { if (--suppressint == 0 && intpending) onint(); }
157#endif
158#define FORCEINTON {suppressint = 0; if (intpending) onint();}
159#define CLEAR_PENDING_INT intpending = 0
160#define int_pending() intpending
161
162static void exraise __P((int)) __attribute__((__noreturn__));
163static void onint __P((void));
164static void error __P((const char *, ...)) __attribute__((__noreturn__));
165static void exerror __P((int, const char *, ...)) __attribute__((__noreturn__));
166static const char *errmsg __P((int, int));
167
168
169/*
170 * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
171 * so we use _setjmp instead.
172 */
173
174#if defined(BSD) && !defined(__SVR4) && !defined(__GLIBC__)
175#define setjmp(jmploc) _setjmp(jmploc)
176#define longjmp(jmploc, val) _longjmp(jmploc, val)
177#endif
178
179
180
181/* $NetBSD: shell.h,v 1.13 2000/05/22 10:18:47 elric Exp $ */
182
183/*
184 * The follow should be set to reflect the type of system you have:
185 * JOBS -> 1 if you have Berkeley job control, 0 otherwise.
186 * SHORTNAMES -> 1 if your linker cannot handle long names.
187 * define BSD if you are running 4.2 BSD or later.
188 * define SYSV if you are running under System V.
189 * define DEBUG=1 to compile in debugging (set global "debug" to turn on)
190 * define DEBUG=2 to compile in and turn on debugging.
191 *
192 * When debugging is on, debugging info will be written to $HOME/trace and
193 * a quit signal will generate a core dump.
194 */
195
196
197#define JOBS 1
198#ifndef BSD
199#define BSD 1
200#endif
201
202#ifdef __STDC__
203typedef void *pointer;
204#ifndef NULL
205#define NULL (void *)0
206#endif
207#else /* not __STDC__ */
208typedef char *pointer;
209#ifndef NULL
210#define NULL 0
211#endif
212#endif /* not __STDC__ */
213
214extern char nullstr[1]; /* null string */
215
216
217#ifdef DEBUG
218#define TRACE(param) trace param
219#else
220#define TRACE(param)
221#endif
222
223
224
225
226/*
227 * This file was generated by the mknodes program.
228 */
229
230#define NSEMI 0
231#define NCMD 1
232#define NPIPE 2
233#define NREDIR 3
234#define NBACKGND 4
235#define NSUBSHELL 5
236#define NAND 6
237#define NOR 7
238#define NIF 8
239#define NWHILE 9
240#define NUNTIL 10
241#define NFOR 11
242#define NCASE 12
243#define NCLIST 13
244#define NDEFUN 14
245#define NARG 15
246#define NTO 16
247#define NFROM 17
248#define NFROMTO 18
249#define NAPPEND 19
250#define NTOOV 20
251#define NTOFD 21
252#define NFROMFD 22
253#define NHERE 23
254#define NXHERE 24
255#define NNOT 25
256
257
258
259struct nbinary {
260 int type;
261 union node *ch1;
262 union node *ch2;
263};
264
265
266struct ncmd {
267 int type;
268 int backgnd;
269 union node *assign;
270 union node *args;
271 union node *redirect;
272};
273
274
275struct npipe {
276 int type;
277 int backgnd;
278 struct nodelist *cmdlist;
279};
280
281
282struct nredir {
283 int type;
284 union node *n;
285 union node *redirect;
286};
287
288
289struct nif {
290 int type;
291 union node *test;
292 union node *ifpart;
293 union node *elsepart;
294};
295
296
297struct nfor {
298 int type;
299 union node *args;
300 union node *body;
301 char *var;
302};
303
304
305struct ncase {
306 int type;
307 union node *expr;
308 union node *cases;
309};
310
311
312struct nclist {
313 int type;
314 union node *next;
315 union node *pattern;
316 union node *body;
317};
318
319
320struct narg {
321 int type;
322 union node *next;
323 char *text;
324 struct nodelist *backquote;
325};
326
327
328struct nfile {
329 int type;
330 union node *next;
331 int fd;
332 union node *fname;
333 char *expfname;
334};
335
336
337struct ndup {
338 int type;
339 union node *next;
340 int fd;
341 int dupfd;
342 union node *vname;
343};
344
345
346struct nhere {
347 int type;
348 union node *next;
349 int fd;
350 union node *doc;
351};
352
353
354struct nnot {
355 int type;
356 union node *com;
357};
358
359
360union node {
361 int type;
362 struct nbinary nbinary;
363 struct ncmd ncmd;
364 struct npipe npipe;
365 struct nredir nredir;
366 struct nif nif;
367 struct nfor nfor;
368 struct ncase ncase;
369 struct nclist nclist;
370 struct narg narg;
371 struct nfile nfile;
372 struct ndup ndup;
373 struct nhere nhere;
374 struct nnot nnot;
375};
376
377
378struct nodelist {
379 struct nodelist *next;
380 union node *n;
381};
382
383
384#ifdef __STDC__
385union node *copyfunc(union node *);
386static void freefunc(union node *);
387#else
388union node *copyfunc();
389static void freefunc();
390#endif
391
392
393
394/* $NetBSD: eval.h,v 1.10 2000/01/27 23:39:40 christos Exp $ */
395extern char *commandname; /* currently executing command */
396extern int exitstatus; /* exit status of last command */
397extern struct strlist *cmdenviron; /* environment for builtin command */
398
399
400struct backcmd { /* result of evalbackcmd */
401 int fd; /* file descriptor to read from */
402 char *buf; /* buffer */
403 int nleft; /* number of chars in buffer */
404 struct job *jp; /* job structure for command */
405};
406
407static int evalcmd __P((int, char **));
408static void evalstring __P((char *, int));
409static void evaltree __P((union node *, int));
410static void evalbackcmd __P((union node *, struct backcmd *));
411static int bltincmd __P((int, char **));
412static int breakcmd __P((int, char **));
413static int returncmd __P((int, char **));
414static int execcmd __P((int, char **));
415
416/* in_function returns nonzero if we are currently evaluating a function */
417#define in_function() funcnest
418extern int funcnest;
419extern int evalskip;
420
421/* reasons for skipping commands (see comment on breakcmd routine) */
422#define SKIPBREAK 1
423#define SKIPCONT 2
424#define SKIPFUNC 3
425#define SKIPFILE 4
426
427
428
429
430/* $NetBSD: exec.h,v 1.17 2000/05/22 10:18:47 elric Exp $ */
431
432/* values of cmdtype */
433#define CMDUNKNOWN -1 /* no entry in table for command */
434#define CMDNORMAL 0 /* command is an executable program */
435#define CMDBUILTIN 1 /* command is a shell builtin */
436#define CMDFUNCTION 2 /* command is a shell function */
437
438
439struct cmdentry {
440 int cmdtype;
441 union param {
442 int index;
443 union node *func;
444 const struct builtincmd *cmd;
445 } u;
446};
447
448
449#define DO_ERR 1 /* find_command prints errors */
450#define DO_ABS 2 /* find_command checks absolute paths */
451#define DO_NOFUN 4 /* find_command ignores functions */
452#define DO_BRUTE 8 /* find_command ignores hash table */
453
454extern const char *pathopt; /* set by padvance */
455extern int exerrno; /* last exec error */
456
457static void shellexec __P((char **, char **, const char *, int))
458 __attribute__((noreturn));
459static char *padvance __P((const char **, const char *));
460static int hashcmd __P((int, char **));
461static void find_command __P((char *, struct cmdentry *, int, const char *));
462struct builtincmd *find_builtin __P((char *));
463static void hashcd __P((void));
464static void changepath __P((const char *));
465static void deletefuncs __P((void));
466#ifdef notdef
467static void getcmdentry __P((char *, struct cmdentry *));
468#endif
469static void addcmdentry __P((char *, struct cmdentry *));
470static void defun __P((char *, union node *));
471static void unsetfunc __P((char *));
472#ifdef ASH_TYPE
473static int typecmd __P((int, char **));
474#endif
475static int commandcmd __P((int, char **));
476
477
478
479/* $NetBSD: expand.h,v 1.12 1999/07/09 03:05:50 christos Exp $ */
480struct strlist {
481 struct strlist *next;
482 char *text;
483};
484
485
486struct arglist {
487 struct strlist *list;
488 struct strlist **lastp;
489};
490
491/*
492 * expandarg() flags
493 */
494#define EXP_FULL 0x1 /* perform word splitting & file globbing */
495#define EXP_TILDE 0x2 /* do normal tilde expansion */
496#define EXP_VARTILDE 0x4 /* expand tildes in an assignment */
497#define EXP_REDIR 0x8 /* file glob for a redirection (1 match only) */
498#define EXP_CASE 0x10 /* keeps quotes around for CASE pattern */
499#define EXP_RECORD 0x20 /* need to record arguments for ifs breakup */
500
501
502static void expandhere __P((union node *, int));
503static void expandarg __P((union node *, struct arglist *, int));
504#ifdef ASH_MATH_SUPPORT
505static void expari __P((int));
506#endif
507#if !(defined(__GLIBC__) && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN))
508static int patmatch __P((char *, char *, int));
509#endif
510#if defined(__GLIBC__) && !defined(FNMATCH_BROKEN)
511#define rmescapes(p) _rmescapes((p), 0)
512static char *_rmescapes __P((char *, int));
513#else
514static void rmescapes __P((char *));
515#endif
516static int casematch __P((union node *, char *));
517
518
519#ifdef ASH_MATH_SUPPORT
520/* From arith.y */
521static int arith __P((const char *));
522static int expcmd __P((int , char **));
523static void arith_lex_reset __P((void));
524static int yylex __P((void));
525#endif
526
527
528
529
530/* $NetBSD: init.h,v 1.8 1995/05/11 21:29:14 christos Exp $ */
531static void init __P((void));
532static void reset __P((void));
533static void initshellproc __P((void));
534
535
536
537/* $NetBSD: input.h,v 1.12 2000/05/22 10:18:47 elric Exp $ */
538
539/* PEOF (the end of file marker) is defined in syntax.h */
540/*
541 * The input line number. Input.c just defines this variable, and saves
542 * and restores it when files are pushed and popped. The user of this
543 * package must set its value.
544 */
545extern int plinno;
546extern int parsenleft; /* number of characters left in input buffer */
547extern char *parsenextc; /* next character in input buffer */
548
549static char *pfgets __P((char *, int));
550static int pgetc __P((void));
551static int pgetc2 __P((void));
552static int preadbuffer __P((void));
553static void pungetc __P((void));
554static void pushstring __P((char *, int, void *));
555static void popstring __P((void));
556static void setinputfile __P((const char *, int));
557static void setinputfd __P((int, int));
558static void setinputstring __P((char *));
559static void popfile __P((void));
560static void popallfiles __P((void));
561static void closescript __P((void));
562
563#define pgetc_macro() (--parsenleft >= 0? *parsenextc++ : preadbuffer())
564
565
566
567/* $NetBSD: jobs.h,v 1.12 2000/05/22 10:18:47 elric Exp $ */
568
569/* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
570#define FORK_FG 0
571#define FORK_BG 1
572#define FORK_NOJOB 2
573
574
575/*
576 * A job structure contains information about a job. A job is either a
577 * single process or a set of processes contained in a pipeline. In the
578 * latter case, pidlist will be non-NULL, and will point to a -1 terminated
579 * array of pids.
580 */
581
582struct procstat {
583 pid_t pid; /* process id */
584 int status; /* status flags (defined above) */
585 char *cmd; /* text of command being run */
586};
587
588
589/* states */
590#define JOBSTOPPED 1 /* all procs are stopped */
591#define JOBDONE 2 /* all procs are completed */
592
593
594struct job {
595 struct procstat ps0; /* status of process */
596 struct procstat *ps; /* status or processes when more than one */
597 short nprocs; /* number of processes */
598 short pgrp; /* process group of this job */
599 char state; /* true if job is finished */
600 char used; /* true if this entry is in used */
601 char changed; /* true if status has changed */
602#if JOBS
603 char jobctl; /* job running under job control */
604#endif
605};
606
607extern short backgndpid; /* pid of last background process */
608extern int job_warning; /* user was warned about stopped jobs */
609
610static void setjobctl __P((int));
611static int killcmd __P((int, char **));
612static int fgcmd __P((int, char **));
613static int bgcmd __P((int, char **));
614static int jobscmd __P((int, char **));
615static void showjobs __P((int));
616static int waitcmd __P((int, char **));
617struct job *makejob __P((union node *, int));
618static int forkshell __P((struct job *, union node *, int));
619static int waitforjob __P((struct job *));
620static int stoppedjobs __P((void));
621static char *commandtext __P((union node *));
622
623#if ! JOBS
624#define setjobctl(on) /* do nothing */
625#endif
626
627
628
629/* $NetBSD: machdep.h,v 1.8 1995/05/11 21:29:21 christos Exp $ */
630
631/*
632 * Most machines require the value returned from malloc to be aligned
633 * in some way. The following macro will get this right on many machines.
634 */
635
636#ifndef ALIGN
637union align {
638 int i;
639 char *cp;
640};
641
642#define ALIGN(nbytes) (((nbytes) + sizeof(union align) - 1) & ~(sizeof(union align) - 1))
643#endif
644
645
646
647/* $NetBSD: mail.h,v 1.8 1995/05/11 21:29:23 christos Exp $ */
648
649static void chkmail __P((int));
650
651
652
653/* $NetBSD: main.h,v 1.8 1995/05/11 21:29:27 christos Exp $ */
654extern int rootpid; /* pid of main shell */
655extern int rootshell; /* true if we aren't a child of the main shell */
656
657static void readcmdfile __P((char *));
658static void cmdloop __P((int));
659static int dotcmd __P((int, char **));
660static int exitcmd __P((int, char **));
661
662
663
664/* $NetBSD: memalloc.h,v 1.11 2000/11/01 19:56:01 christos Exp $ */
665struct stackmark {
666 struct stack_block *stackp;
667 char *stacknxt;
668 int stacknleft;
669 struct stackmark *marknext;
670};
671
672
673extern char *stacknxt;
674extern int stacknleft;
675extern int sstrnleft;
676extern int herefd;
677
678static inline pointer ckmalloc (int sz) { return xmalloc(sz); }
679static inline pointer ckrealloc(void *p, int sz) { return xrealloc(p, sz); }
680static inline char * savestr (const char *s) { return xstrdup(s); }
681
682pointer stalloc __P((int));
683static void stunalloc __P((pointer));
684static void setstackmark __P((struct stackmark *));
685static void popstackmark __P((struct stackmark *));
686static void growstackblock __P((void));
687static void grabstackblock __P((int));
688static char *growstackstr __P((void));
689static char *makestrspace __P((size_t));
690static void ungrabstackstr __P((char *, char *));
691
692
693
694#define stackblock() stacknxt
695#define stackblocksize() stacknleft
696#define STARTSTACKSTR(p) p = stackblock(), sstrnleft = stackblocksize()
697#define STPUTC(c, p) (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
698#define CHECKSTRSPACE(n, p) { if (sstrnleft < n) p = makestrspace(n); }
699#define USTPUTC(c, p) (--sstrnleft, *p++ = (c))
700#define STACKSTRNUL(p) (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
701#define STUNPUTC(p) (++sstrnleft, --p)
702#define STTOPC(p) p[-1]
703#define STADJUST(amount, p) (p += (amount), sstrnleft -= (amount))
704#define grabstackstr(p) stalloc(stackblocksize() - sstrnleft)
705
706#define ckfree(p) free((pointer)(p))
707
708
709
710/* $NetBSD: miscbltin.h,v 1.1 1997/07/04 21:02:10 christos Exp $ */
711static int readcmd __P((int, char **));
712static int umaskcmd __P((int, char **));
713static int ulimitcmd __P((int, char **));
714
715
716
717/* $NetBSD: mystring.h,v 1.9 1995/05/11 21:29:42 christos Exp $ */
718
719extern const char snlfmt[];
720extern const char spcstr[];
721
722#if 0
723static void scopyn __P((const char *, char *, int));
724#endif
725static int prefix __P((const char *, const char *));
726static int number __P((const char *));
727static int is_number __P((const char *));
728static char *single_quote __P((const char *));
729static char *sstrdup __P((const char *));
730static int pstrcmp __P((const void *, const void *));
731static const char *const *findstring __P((const char *, const char *const *, size_t));
732
733#define equal(s1, s2) (strcmp(s1, s2) == 0)
734#define scopy(s1, s2) ((void)strcpy(s2, s1))
735
736
737/* $NetBSD: options.h,v 1.14 2001/02/04 19:52:06 christos Exp $ */
738
739struct shparam {
740 int nparam; /* # of positional parameters (without $0) */
741 unsigned char malloc; /* if parameter list dynamically allocated */
742 char **p; /* parameter list */
743 int optind; /* next parameter to be processed by getopts */
744 int optoff; /* used by getopts */
745};
746
747
748
749#define eflag optlist[0].val
750#define fflag optlist[1].val
751#define Iflag optlist[2].val
752#define iflag optlist[3].val
753#define mflag optlist[4].val
754#define nflag optlist[5].val
755#define sflag optlist[6].val
756#define xflag optlist[7].val
757#define vflag optlist[8].val
758#define Vflag optlist[9].val
759#define Eflag optlist[10].val
760#define Cflag optlist[11].val
761#define aflag optlist[12].val
762#define bflag optlist[13].val
763#define uflag optlist[14].val
764#define qflag optlist[15].val
765
766#define NOPTS 16
767
768struct optent {
769 const char *name;
770 const char letter;
771 char val;
772};
773
774extern struct optent optlist[NOPTS];
775
776
777extern char *minusc; /* argument to -c option */
778extern char *arg0; /* $0 */
779extern struct shparam shellparam; /* $@ */
780extern char **argptr; /* argument list for builtin commands */
781extern char *optionarg; /* set by nextopt */
782extern char *optptr; /* used by nextopt */
783
784static void procargs __P((int, char **));
785static void optschanged __P((void));
786static void setparam __P((char **));
787static void freeparam __P((volatile struct shparam *));
788static int shiftcmd __P((int, char **));
789static int setcmd __P((int, char **));
790#ifdef ASH_GETOPTS
791static int getoptscmd __P((int, char **));
792static int setvarsafe __P((const char *, const char *, int));
793#endif
794static int nextopt __P((const char *));
795static void getoptsreset __P((const char *));
796
797
798
799/* $NetBSD: output.h,v 1.14 1998/01/31 12:37:55 christos Exp $ */
800struct output {
801#ifdef USE_GLIBC_STDIO
802 FILE *stream;
803#endif
804 char *nextc;
805 int nleft;
806 char *buf;
807 int bufsize;
808 int fd;
809 short flags;
810};
811
812extern struct output output;
813extern struct output errout;
814extern struct output memout;
815extern struct output *out1;
816extern struct output *out2;
817
818static void outstr __P((const char *, struct output *));
819#ifndef USE_GLIBC_STDIO
820static void outcslow __P((char, struct output *));
821#endif
822static void flushall __P((void));
823static void flushout __P((struct output *));
824static void freestdout __P((void));
825static void outfmt __P((struct output *, const char *, ...))
826 __attribute__((__format__(__printf__,2,3)));
827static void out1fmt __P((const char *, ...))
828 __attribute__((__format__(__printf__,1,2)));
829static void fmtstr __P((char *, size_t, const char *, ...))
830 __attribute__((__format__(__printf__,3,4)));
831#ifndef USE_GLIBC_STDIO
832static void doformat __P((struct output *, const char *, va_list));
833#endif
834static int xwrite __P((int, const char *, int));
835#ifdef USE_GLIBC_STDIO
836static void initstreams __P((void));
837static void openmemout __P((void));
838static int __closememout __P((void));
839#endif
840
841#define OUTPUT_ERR 01 /* error occurred on output */
842
843#ifdef USE_GLIBC_STDIO
844#define outc(c, o) putc((c), (o)->stream)
845#define doformat(d, f, a) vfprintf((d)->stream, (f), (a))
846#else
847#define outc(c, file) (--(file)->nleft < 0? outcslow((c), (file)) : (*(file)->nextc = (c), (file)->nextc++))
848#endif
849#define out1c(c) outc((c), out1)
850#define out2c(c) outc((c), out2)
851#define out1str(s) outstr((s), out1)
852#define out2str(s) outstr((s), out2)
853#define outerr(f) ((f)->flags & OUTPUT_ERR)
854
855
856
857/* $NetBSD: parser.h,v 1.14 2000/07/27 04:09:28 cgd Exp $ */
858/* control characters in argument strings */
859#define CTLESC '\201'
860#define CTLVAR '\202'
861#define CTLENDVAR '\203'
862#define CTLBACKQ '\204'
863#define CTLQUOTE 01 /* ored with CTLBACKQ code if in quotes */
864/* CTLBACKQ | CTLQUOTE == '\205' */
865#define CTLARI '\206'
866#define CTLENDARI '\207'
867#define CTLQUOTEMARK '\210'
868
869/* variable substitution byte (follows CTLVAR) */
870#define VSTYPE 0x0f /* type of variable substitution */
871#define VSNUL 0x10 /* colon--treat the empty string as unset */
872#define VSQUOTE 0x80 /* inside double quotes--suppress splitting */
873
874/* values of VSTYPE field */
875#define VSNORMAL 0x1 /* normal variable: $var or ${var} */
876#define VSMINUS 0x2 /* ${var-text} */
877#define VSPLUS 0x3 /* ${var+text} */
878#define VSQUESTION 0x4 /* ${var?message} */
879#define VSASSIGN 0x5 /* ${var=text} */
880#define VSTRIMLEFT 0x6 /* ${var#pattern} */
881#define VSTRIMLEFTMAX 0x7 /* ${var##pattern} */
882#define VSTRIMRIGHT 0x8 /* ${var%pattern} */
883#define VSTRIMRIGHTMAX 0x9 /* ${var%%pattern} */
884#define VSLENGTH 0xa /* ${#var} */
885
886
887/*
888 * NEOF is returned by parsecmd when it encounters an end of file. It
889 * must be distinct from NULL, so we use the address of a variable that
890 * happens to be handy.
891 */
892extern int tokpushback;
893#define NEOF ((union node *)&tokpushback)
894extern int whichprompt; /* 1 == PS1, 2 == PS2 */
895extern int checkalias;
896
897
898union node *parsecmd(int);
899static void fixredir(union node *, const char *, int);
900static int goodname(char *);
901static const char *getprompt(void *);
902static int isassignment __P((const char *));
903static const char *const *findkwd __P((const char *));
904
905
906/* $NetBSD: redir.h,v 1.12 2000/05/22 10:18:47 elric Exp $ */
907/* flags passed to redirect */
908#define REDIR_PUSH 01 /* save previous values of file descriptors */
909#define REDIR_BACKQ 02 /* save the command output in memory */
910
911extern int fileno2;
912
913static void redirect __P((union node *, int));
914static void popredir __P((void));
915static int fd0_redirected_p __P((void));
916static void clearredir __P((void));
917static int dup_as_newfd __P((int, int));
918
919
920
921
922/* $NetBSD: show.h,v 1.4 1999/10/08 21:10:44 pk Exp $ */
923#ifdef DEBUG
924static void trace __P((const char *, ...));
925static void trargs __P((char **));
926static void showtree __P((union node *));
927static void trputc __P((int));
928static void trputs __P((const char *));
929static void opentrace __P((void));
930#endif
931/*
932 * This file was generated by the mksyntax program.
933 */
934
935#ifdef CEOF
936#undef CEOF
937#endif
938
939/* Syntax classes */
940#define CWORD 0 /* character is nothing special */
941#define CNL 1 /* newline character */
942#define CBACK 2 /* a backslash character */
943#define CSQUOTE 3 /* single quote */
944#define CDQUOTE 4 /* double quote */
945#define CENDQUOTE 5 /* a terminating quote */
946#define CBQUOTE 6 /* backwards single quote */
947#define CVAR 7 /* a dollar sign */
948#define CENDVAR 8 /* a '}' character */
949#define CLP 9 /* a left paren in arithmetic */
950#define CRP 10 /* a right paren in arithmetic */
951#define CEOF 11 /* end of file */
952#define CCTL 12 /* like CWORD, except it must be escaped */
953#define CSPCL 13 /* these terminate a word */
954#define CIGN 14 /* character should be ignored */
955
956/* Syntax classes for is_ functions */
957#define ISDIGIT 01 /* a digit */
958#define ISUPPER 02 /* an upper case letter */
959#define ISLOWER 04 /* a lower case letter */
960#define ISUNDER 010 /* an underscore */
961#define ISSPECL 020 /* the name of a special parameter */
962
963#define SYNBASE 130
964#define PEOF -130
965
966#define PEOA -129
967
968
969#define BASESYNTAX (basesyntax + SYNBASE)
970#define DQSYNTAX (dqsyntax + SYNBASE)
971#define SQSYNTAX (sqsyntax + SYNBASE)
972#define ARISYNTAX (arisyntax + SYNBASE)
973
974#define is_digit(c) ((unsigned)((c) - '0') <= 9)
975#define is_alpha(c) (((c) < CTLESC || (c) > CTLENDARI) && isalpha((unsigned char) (c)))
976#define is_name(c) (((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))
977#define is_in_name(c) (((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalnum((unsigned char) (c))))
978#define is_special(c) ((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))
979#define digit_val(c) ((c) - '0')
980
981extern const char basesyntax[];
982extern const char dqsyntax[];
983extern const char sqsyntax[];
984extern const char arisyntax[];
985extern const char is_type[];
986#define TEOF 0
987#define TNL 1
988#define TSEMI 2
989#define TBACKGND 3
990#define TAND 4
991#define TOR 5
992#define TPIPE 6
993#define TLP 7
994#define TRP 8
995#define TENDCASE 9
996#define TENDBQUOTE 10
997#define TREDIR 11
998#define TWORD 12
999#define TASSIGN 13
1000#define TNOT 14
1001#define TCASE 15
1002#define TDO 16
1003#define TDONE 17
1004#define TELIF 18
1005#define TELSE 19
1006#define TESAC 20
1007#define TFI 21
1008#define TFOR 22
1009#define TIF 23
1010#define TIN 24
1011#define TTHEN 25
1012#define TUNTIL 26
1013#define TWHILE 27
1014#define TBEGIN 28
1015#define TEND 29
1016
1017/* Array indicating which tokens mark the end of a list */
1018static const char tokendlist[] = {
1019 1,
1020 0,
1021 0,
1022 0,
1023 0,
1024 0,
1025 0,
1026 0,
1027 1,
1028 1,
1029 1,
1030 0,
1031 0,
1032 0,
1033 0,
1034 0,
1035 1,
1036 1,
1037 1,
1038 1,
1039 1,
1040 1,
1041 0,
1042 0,
1043 0,
1044 1,
1045 0,
1046 0,
1047 0,
1048 1,
1049};
1050
1051static const char *const tokname[] = {
1052 "end of file",
1053 "newline",
1054 "\";\"",
1055 "\"&\"",
1056 "\"&&\"",
1057 "\"||\"",
1058 "\"|\"",
1059 "\"(\"",
1060 "\")\"",
1061 "\";;\"",
1062 "\"`\"",
1063 "redirection",
1064 "word",
1065 "assignment",
1066 "\"!\"",
1067 "\"case\"",
1068 "\"do\"",
1069 "\"done\"",
1070 "\"elif\"",
1071 "\"else\"",
1072 "\"esac\"",
1073 "\"fi\"",
1074 "\"for\"",
1075 "\"if\"",
1076 "\"in\"",
1077 "\"then\"",
1078 "\"until\"",
1079 "\"while\"",
1080 "\"{\"",
1081 "\"}\"",
1082};
1083
1084#define KWDOFFSET 14
1085
1086static const char *const parsekwd[] = {
1087 "!",
1088 "case",
1089 "do",
1090 "done",
1091 "elif",
1092 "else",
1093 "esac",
1094 "fi",
1095 "for",
1096 "if",
1097 "in",
1098 "then",
1099 "until",
1100 "while",
1101 "{",
1102 "}"
1103};
1104
1105
1106
1107
1108/* $NetBSD: trap.h,v 1.14 2000/05/22 10:18:47 elric Exp $ */
1109extern int pendingsigs;
1110
1111static int trapcmd __P((int, char **));
1112static void clear_traps __P((void));
1113static void setsignal __P((int));
1114static void ignoresig __P((int));
1115static void onsig __P((int));
1116static void dotrap __P((void));
1117static void setinteractive __P((int));
1118static void exitshell __P((int)) __attribute__((noreturn));
1119static int decode_signal __P((const char *, int));
1120
1121
1122
1123/* $NetBSD: var.h,v 1.18 2000/05/22 10:18:47 elric Exp $ */
1124
1125/*
1126 * Shell variables.
1127 */
1128
1129/* flags */
1130#define VEXPORT 0x01 /* variable is exported */
1131#define VREADONLY 0x02 /* variable cannot be modified */
1132#define VSTRFIXED 0x04 /* variable struct is staticly allocated */
1133#define VTEXTFIXED 0x08 /* text is staticly allocated */
1134#define VSTACK 0x10 /* text is allocated on the stack */
1135#define VUNSET 0x20 /* the variable is not set */
1136#define VNOFUNC 0x40 /* don't call the callback function */
1137
1138
1139struct var {
1140 struct var *next; /* next entry in hash list */
1141 int flags; /* flags are defined above */
1142 char *text; /* name=value */
1143 void (*func) __P((const char *));
1144 /* function to be called when */
1145 /* the variable gets set/unset */
1146};
1147
1148
1149struct localvar {
1150 struct localvar *next; /* next local variable in list */
1151 struct var *vp; /* the variable that was made local */
1152 int flags; /* saved flags */
1153 char *text; /* saved text */
1154};
1155
1156
1157extern struct localvar *localvars;
1158
1159#if ATTY
1160extern struct var vatty;
1161#endif
1162extern struct var vifs;
1163extern struct var vmail;
1164extern struct var vmpath;
1165extern struct var vpath;
1166extern struct var vps1;
1167extern struct var vps2;
1168#ifndef SMALL
1169extern struct var vterm;
1170extern struct var vtermcap;
1171extern struct var vhistsize;
1172#endif
1173
1174#ifdef IFS_BROKEN
1175extern const char defifsvar[];
1176#define defifs (defifsvar + 4)
1177#else
1178extern const char defifs[];
1179#endif
1180extern const char defpathvar[];
1181#define defpath (defpathvar + 5)
1182
1183/*
1184 * The following macros access the values of the above variables.
1185 * They have to skip over the name. They return the null string
1186 * for unset variables.
1187 */
1188
1189#define ifsval() (vifs.text + 4)
1190#define ifsset() ((vifs.flags & VUNSET) == 0)
1191#define mailval() (vmail.text + 5)
1192#define mpathval() (vmpath.text + 9)
1193#define pathval() (vpath.text + 5)
1194#define ps1val() (vps1.text + 4)
1195#define ps2val() (vps2.text + 4)
1196#define optindval() (voptind.text + 7)
1197#ifndef SMALL
1198#define histsizeval() (vhistsize.text + 9)
1199#define termval() (vterm.text + 5)
1200#endif
1201
1202#if ATTY
1203#define attyset() ((vatty.flags & VUNSET) == 0)
1204#endif
1205#define mpathset() ((vmpath.flags & VUNSET) == 0)
1206
1207static void initvar __P((void));
1208static void setvar __P((const char *, const char *, int));
1209static void setvareq __P((char *, int));
1210struct strlist;
1211static void listsetvar __P((struct strlist *));
1212static char *lookupvar __P((const char *));
1213static char *bltinlookup __P((const char *));
1214static char **environment __P((void));
1215static void shprocvar __P((void));
1216static int showvarscmd __P((int, char **));
1217static int exportcmd __P((int, char **));
1218static int localcmd __P((int, char **));
1219static void mklocal __P((char *));
1220static void poplocalvars __P((void));
1221static int setvarcmd __P((int, char **));
1222static int unsetcmd __P((int, char **));
1223static int unsetvar __P((const char *));
1224static int varequal __P((const char *, const char *));
1225
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