1/* $Header: /src/pub/tcsh/sh.h,v 3.93 2000/11/19 20:50:43 christos Exp $ */
2/*
3 * sh.h: Catch it all globals and includes file!
4 */
5/*-
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37#ifndef _h_sh
38#define _h_sh
39
40#include "config.h"
41
42#ifndef EXTERN
43# define EXTERN extern
44#else /* !EXTERN */
45# ifdef WINNT_NATIVE
46# define IZERO = 0
47# define IZERO_STRUCT = {0}
48# endif /* WINNT_NATIVE */
49#endif /* EXTERN */
50
51#ifndef IZERO
52# define IZERO
53#endif /* IZERO */
54#ifndef IZERO_STRUCT
55# define IZERO_STRUCT
56# endif /* IZERO_STRUCT */
57
58#ifndef WINNT_NATIVE
59# define INIT_ZERO
60# define INIT_ZERO_STRUCT
61# define force_read read
62#endif /*!WINNT_NATIVE */
63/*
64 * Sanity
65 */
66#if defined(_POSIX_SOURCE) && !defined(POSIX)
67# define POSIX
68#endif
69
70#if defined(POSIXJOBS) && !defined(BSDJOBS)
71# define BSDJOBS
72#endif
73
74#if defined(POSIXSIGS) && !defined(BSDSIGS)
75# define BSDSIGS
76#endif
77
78#ifdef SHORT_STRINGS
79typedef short Char;
80typedef unsigned short uChar;
81# define SAVE(a) (Strsave(str2short(a)))
82#else
83typedef char Char;
84typedef unsigned char uChar;
85# define SAVE(a) (strsave(a))
86#endif
87
88/* Elide unused argument warnings */
89#define USE(a) (void) (a)
90/*
91 * If your compiler complains, then you can either
92 * throw it away and get gcc or, use the following define
93 * and get rid of the typedef.
94 * [The 4.2/3BSD vax compiler does not like that]
95 * Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com
96 */
97#ifdef SIGVOID
98# if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__)
99# define sigret_t void
100# else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */
101typedef void sigret_t;
102# endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */
103#else /* !SIGVOID */
104typedef int sigret_t;
105#endif /* SIGVOID */
106
107/*
108 * Return true if the path is absolute
109 */
110#ifndef WINNT_NATIVE
111# define ABSOLUTEP(p) (*(p) == '/')
112#else /* WINNT_NATIVE */
113# define ABSOLUTEP(p) ((p)[0] == '/' || \
114 (Isalpha((p)[0]) && (p)[1] == ':' && (p)[2] == '/'))
115#endif /* WINNT_NATIVE */
116
117/*
118 * Fundamental definitions which may vary from system to system.
119 *
120 * BUFSIZE The i/o buffering size; also limits word size
121 * MAILINTVL How often to mailcheck; more often is more expensive
122 */
123#ifdef BUFSIZE
124# if BUFSIZE < 4096
125# undef BUFSIZE
126# define BUFSIZE 4096 /* buffer size should be no less than this */
127# endif
128#else
129# define BUFSIZE 4096
130#endif /* BUFSIZE */
131
132#define FORKSLEEP 10 /* delay loop on non-interactive fork failure */
133#define MAILINTVL 600 /* 10 minutes */
134
135#ifndef INBUFSIZE
136# define INBUFSIZE 2*BUFSIZE /* Num input characters on the command line */
137#endif /* INBUFSIZE */
138
139
140/*
141 * What our builtin echo looks like
142 */
143#define NONE_ECHO 0
144#define BSD_ECHO 1
145#define SYSV_ECHO 2
146#define BOTH_ECHO (BSD_ECHO|SYSV_ECHO)
147
148#ifndef ECHO_STYLE
149# if SYSVREL > 0
150# define ECHO_STYLE SYSV_ECHO
151# else /* SYSVREL == 0 */
152# define ECHO_STYLE BSD_ECHO
153# endif /* SYSVREL */
154#endif /* ECHO_STYLE */
155
156/*
157 * The shell moves std in/out/diag and the old std input away from units
158 * 0, 1, and 2 so that it is easy to set up these standards for invoked
159 * commands.
160 */
161#define FSHTTY 15 /* /dev/tty when manip pgrps */
162#define FSHIN 16 /* Preferred desc for shell input */
163#define FSHOUT 17 /* ... shell output */
164#define FSHDIAG 18 /* ... shell diagnostics */
165#define FOLDSTD 19 /* ... old std input */
166
167#ifdef PROF
168#define xexit(n) done(n)
169#endif
170
171#ifdef cray
172# define word word_t /* sys/types.h defines word.. bad move! */
173#endif
174
175#include <sys/types.h>
176
177#ifdef cray
178# undef word
179#endif
180
181/*
182 * Path separator in environment variables
183 */
184#ifndef PATHSEP
185# if defined(__EMX__) || defined(WINNT_NATIVE)
186# define PATHSEP ';'
187# else /* unix */
188# define PATHSEP ':'
189# endif /* __EMX__ || WINNT_NATIVE */
190#endif /* !PATHSEP */
191
192#ifdef __HP_CXD_SPP
193# include <sys/cnx_stat.h>
194# define stat stat64
195# define fstat fstat64
196# define lstat lstat64
197#endif /* __HP_CXD_SPP */
198
199/*
200 * This macro compares the st_dev field of struct stat. On aix on ibmESA
201 * st_dev is a structure, so comparison does not work.
202 */
203#ifndef DEV_DEV_COMPARE
204# define DEV_DEV_COMPARE(x,y) ((x) == (y))
205#endif /* DEV_DEV_COMPARE */
206
207#ifdef _SEQUENT_
208# include <sys/procstats.h>
209#endif /* _SEQUENT_ */
210#if (defined(POSIX) || SYSVREL > 0) && !defined(WINNT_NATIVE)
211# include <sys/times.h>
212#endif /* (POSIX || SYSVREL > 0) && !WINNT_NATIVE */
213
214#ifdef NLS
215# include <locale.h>
216#endif /* NLS */
217
218
219#if !defined(_MINIX) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) && !defined(__MVS__)
220# include <sys/param.h>
221#endif /* !_MINIX && !_VMS_POSIX && !WINNT_NATIVE && !__MVS__ */
222#include <sys/stat.h>
223
224#if defined(BSDTIMES) || defined(BSDLIMIT)
225# include <sys/time.h>
226# if SYSVREL>3 && !defined(SCO) && !defined(sgi) && !defined(SNI) && !defined(sun) && !(defined(__alpha) && defined(__osf__)) && !defined(_SX) && !defined(__MVS__)
227# include "/usr/ucbinclude/sys/resource.h"
228# else
229# ifdef convex
230# define sysrusage cvxrusage
231# include <sys/sysinfo.h>
232# else
233# define sysrusage rusage
234# include <sys/resource.h>
235# endif /* convex */
236# endif /* SYSVREL>3 */
237#endif /* BSDTIMES */
238
239#ifndef WINNT_NATIVE
240# ifndef POSIX
241# ifdef TERMIO
242# include <termio.h>
243# else /* SGTTY */
244# include <sgtty.h>
245# endif /* TERMIO */
246# else /* POSIX */
247# ifndef _UWIN
248# include <termios.h>
249# else
250# include <termio.h>
251# endif /* _UWIN */
252# if SYSVREL > 3
253# undef TIOCGLTC /* we don't need those, since POSIX has them */
254# undef TIOCSLTC
255# undef CSWTCH
256# define CSWTCH _POSIX_VDISABLE /* So job control works */
257# endif /* SYSVREL > 3 */
258# endif /* POSIX */
259#endif /* WINNT_NATIVE */
260
261#ifdef sonyrisc
262# include <sys/ttold.h>
263#endif /* sonyrisc */
264
265#if defined(POSIX) && !defined(WINNT_NATIVE)
266/*
267 * We should be using setpgid and setpgid
268 * by now, but in some systems we use the
269 * old routines...
270 */
271# define getpgrp __getpgrp
272# define setpgrp __setpgrp
273# include <unistd.h>
274# undef getpgrp
275# undef setpgrp
276
277/*
278 * the gcc+protoize version of <stdlib.h>
279 * redefines malloc(), so we define the following
280 * to avoid it.
281 */
282# if defined(linux) || defined(sgi) || defined(_OSD_POSIX)
283# define NO_FIX_MALLOC
284# include <stdlib.h>
285# else /* linux */
286# define _GNU_STDLIB_H
287# define malloc __malloc
288# define free __free
289# define calloc __calloc
290# define realloc __realloc
291# include <stdlib.h>
292# undef malloc
293# undef free
294# undef calloc
295# undef realloc
296# endif /* linux || sgi */
297# include <limits.h>
298#endif /* POSIX && !WINNT_NATIVE */
299
300#if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX)
301# if !defined(pyr) && !defined(stellar)
302# include <time.h>
303# ifdef _MINIX
304# define HZ CLOCKS_PER_SEC
305# endif /* _MINIX */
306# endif /* !pyr && !stellar */
307#endif /* SYSVREL > 0 || _IBMR2 */
308
309/* In the following ifdef the DECOSF1 has been commented so that later
310 * versions of DECOSF1 will get TIOCGWINSZ. This might break older versions...
311 */
312#if !((defined(SUNOS4) || defined(_MINIX) /* || defined(DECOSF1) */) && defined(TERMIO))
313# if !defined(COHERENT) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE)
314# include <sys/ioctl.h>
315# endif
316#endif
317
318#if (defined(__DGUX__) && defined(POSIX)) || defined(DGUX)
319#undef CSWTCH
320#define CSWTCH _POSIX_VDISABLE
321#endif
322
323#if (!defined(FIOCLEX) && defined(SUNOS4)) || ((SYSVREL == 4) && !defined(_SEQUENT_) && !defined(SCO) && !defined(_SX)) && !defined(__MVS__)
324# include <sys/filio.h>
325#endif /* (!FIOCLEX && SUNOS4) || (SYSVREL == 4 && !_SEQUENT_ && !SCO && !_SX ) */
326
327#if !defined(_MINIX) && !defined(COHERENT) && !defined(supermax) && !defined(WINNT_NATIVE) && !defined(IRIS4D)
328# include <sys/file.h>
329#endif /* !_MINIX && !COHERENT && !supermax && !WINNT_NATIVE && !defined(IRIS4D) */
330
331#if !defined(O_RDONLY) || !defined(O_NDELAY)
332# include <fcntl.h>
333#endif
334
335#include <errno.h>
336
337#include <setjmp.h>
338
339#if __STDC__ || defined(FUNCPROTO)
340# include <stdarg.h>
341#else
342#ifdef _MINIX
343# include "mi.varargs.h"
344#else
345# include <varargs.h>
346#endif /* _MINIX */
347#endif
348
349#ifdef DIRENT
350# include <dirent.h>
351#else
352# ifdef hp9000s500
353# include <ndir.h>
354# else
355# include <sys/dir.h>
356# endif
357# define dirent direct
358#endif /* DIRENT */
359#if defined(hpux) || defined(sgi) || defined(OREO) || defined(COHERENT)
360# include <stdio.h> /* So the fgetpwent() prototypes work */
361#endif /* hpux || sgi || OREO || COHERENT */
362#ifndef WINNT_NATIVE
363#include <pwd.h>
364#include <grp.h>
365#endif /* WINNT_NATIVE */
366#ifdef PW_SHADOW
367# include <shadow.h>
368#endif /* PW_SHADOW */
369#ifdef PW_AUTH
370# include <auth.h>
371#endif /* PW_AUTH */
372#if defined(BSD) && !defined(POSIX)
373# include <strings.h>
374# define strchr(a, b) index(a, b)
375# define strrchr(a, b) rindex(a, b)
376#else
377# include <string.h>
378#endif /* BSD */
379
380/*
381 * IRIX-5.0 has <sys/cdefs.h>, but most system include files do not
382 * include it yet, so we include it here
383 */
384#if defined(sgi) && SYSVREL > 3
385# include <sys/cdefs.h>
386#endif /* sgi && SYSVREL > 3 */
387
388#ifdef REMOTEHOST
389# ifdef ISC
390# undef MAXHOSTNAMELEN /* Busted headers? */
391# endif
392
393# include <netinet/in.h>
394# include <arpa/inet.h>
395# include <sys/socket.h>
396# if defined(_SS_SIZE) || defined(_SS_MAXSIZE)
397# define INET6
398# endif
399# include <sys/uio.h> /* For struct iovec */
400#endif /* REMOTEHOST */
401
402/*
403 * ANSIisms... These must be *after* the system include and
404 * *before* our includes, so that BSDreno has time to define __P
405 */
406#undef __P
407#ifndef __P
408# if __STDC__ || defined(FUNCPROTO)
409# ifndef FUNCPROTO
410# define FUNCPROTO
411# endif
412# define __P(a) a
413# else
414# define __P(a) ()
415# if !__STDC__
416# define const
417# ifndef apollo
418# define volatile /* Apollo 'c' extensions need this */
419# endif /* apollo */
420# endif
421# endif
422#endif
423
424
425#ifdef PURIFY
426/* exit normally, allowing purify to trace leaks */
427# define _exit exit
428typedef int pret_t;
429#else /* !PURIFY */
430/*
431 * If your compiler complains, then you can either
432 * throw it away and get gcc or, use the following define
433 * and get rid of the typedef.
434 * [The 4.2/3BSD vax compiler does not like that]
435 * Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com
436 */
437# if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__)
438# define pret_t void
439# else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */
440typedef void pret_t;
441# endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */
442#endif /* PURIFY */
443
444typedef int bool;
445
446/*
447 * ASCII vs. EBCDIC
448 */
449#if 'Z' - 'A' == 25
450# ifndef IS_ASCII
451# define IS_ASCII
452# endif
453#endif
454
455#include "sh.types.h"
456
457#ifndef WINNT_NATIVE
458# ifndef POSIX
459extern pid_t getpgrp __P((int));
460# else /* POSIX */
461# if (defined(BSD) && !defined(BSD4_4)) || defined(SUNOS4) || defined(IRIS4D) || defined(DGUX)
462extern pid_t getpgrp __P((int));
463# else /* !(BSD || SUNOS4 || IRIS4D || DGUX) */
464extern pid_t getpgrp __P((void));
465# endif /* BSD || SUNOS4 || IRISD || DGUX */
466# endif /* POSIX */
467extern pid_t setpgrp __P((pid_t, pid_t));
468#endif /* !WINNT_NATIVE */
469
470typedef sigret_t (*signalfun_t) __P((int));
471
472#ifndef lint
473typedef ptr_t memalign_t;
474#else
475typedef union {
476 char am_char, *am_char_p;
477 short am_short, *am_short_p;
478 int am_int, *am_int_p;
479 long am_long, *am_long_p;
480 float am_float, *am_float_p;
481 double am_double, *am_double_p;
482} *memalign_t;
483
484# define malloc lint_malloc
485# define free lint_free
486# define realloc lint_realloc
487# define calloc lint_calloc
488#endif
489
490#ifdef MDEBUG
491extern memalign_t DebugMalloc __P((unsigned, char *, int));
492extern memalign_t DebugRealloc __P((ptr_t, unsigned, char *, int));
493extern memalign_t DebugCalloc __P((unsigned, unsigned, char *, int));
494extern void DebugFree __P((ptr_t, char *, int));
495# define xmalloc(i) DebugMalloc(i, __FILE__, __LINE__)
496# define xrealloc(p, i)((p) ? DebugRealloc(p, i, __FILE__, __LINE__) : \
497 DebugMalloc(i, __FILE__, __LINE__))
498# define xcalloc(n, s) DebugCalloc(n, s, __FILE__, __LINE__)
499# define xfree(p) if (p) DebugFree(p, __FILE__, __LINE__)
500#else
501# ifdef SYSMALLOC
502# define xmalloc(i) smalloc(i)
503# define xrealloc(p, i) srealloc(p, i)
504# define xcalloc(n, s) scalloc(n, s)
505# define xfree(p) sfree(p)
506# else
507# define xmalloc(i) malloc(i)
508# define xrealloc(p, i) realloc(p, i)
509# define xcalloc(n, s) calloc(n, s)
510# define xfree(p) free(p)
511# endif /* SYSMALLOC */
512#endif /* MDEBUG */
513#include "sh.char.h"
514#include "sh.err.h"
515#include "sh.dir.h"
516#include "sh.proc.h"
517
518#include "pathnames.h"
519
520
521/*
522 * C shell
523 *
524 * Bill Joy, UC Berkeley
525 * October, 1978; May 1980
526 *
527 * Jim Kulp, IIASA, Laxenburg Austria
528 * April, 1980
529 */
530
531#if !defined(MAXNAMLEN) && defined(_D_NAME_MAX)
532# define MAXNAMLEN _D_NAME_MAX
533#endif /* MAXNAMLEN */
534
535#ifdef HESIOD
536# include <hesiod.h>
537#endif /* HESIOD */
538
539#ifdef REMOTEHOST
540# include <netdb.h>
541#endif /* REMOTEHOST */
542
543#ifndef MAXHOSTNAMELEN
544# if defined(SCO) && (SYSVREL > 3)
545# include <sys/socket.h>
546# else
547# define MAXHOSTNAMELEN 255
548# endif
549#endif /* MAXHOSTNAMELEN */
550
551
552
553#define eq(a, b) (Strcmp(a, b) == 0)
554
555/* globone() flags */
556#define G_ERROR 0 /* default action: error if multiple words */
557#define G_IGNORE 1 /* ignore the rest of the words */
558#define G_APPEND 2 /* make a sentence by cat'ing the words */
559
560/*
561 * Global flags
562 */
563EXTERN bool chkstop IZERO; /* Warned of stopped jobs... allow exit */
564
565#if (defined(FIOCLEX) && defined(FIONCLEX)) || defined(F_SETFD)
566# define CLOSE_ON_EXEC
567#else
568EXTERN bool didcch IZERO; /* Have closed unused fd's for child */
569#endif /* (FIOCLEX && FIONCLEX) || F_SETFD */
570
571EXTERN bool didfds IZERO; /* Have setup i/o fd's for child */
572EXTERN bool doneinp IZERO; /* EOF indicator after reset from readc */
573EXTERN bool exiterr IZERO; /* Exit if error or non-zero exit status */
574EXTERN bool child IZERO; /* Child shell ... errors cause exit */
575EXTERN bool haderr IZERO; /* Reset was because of an error */
576EXTERN bool intty IZERO; /* Input is a tty */
577EXTERN bool intact IZERO; /* We are interactive... therefore prompt */
578EXTERN bool justpr IZERO; /* Just print because of :p hist mod */
579EXTERN bool loginsh IZERO; /* We are a loginsh -> .login/.logout */
580EXTERN bool neednote IZERO; /* Need to pnotify() */
581EXTERN bool noexec IZERO; /* Don't execute, just syntax check */
582EXTERN bool pjobs IZERO; /* want to print jobs if interrupted */
583EXTERN bool setintr IZERO; /* Set interrupts on/off -> Wait intr... */
584EXTERN bool timflg IZERO; /* Time the next waited for command */
585EXTERN bool havhash IZERO; /* path hashing is available */
586EXTERN bool editing IZERO; /* doing filename expansion and line editing */
587EXTERN bool noediting IZERO; /* initial $term defaulted to noedit */
588EXTERN bool bslash_quote IZERO;/* PWP: tcsh-style quoting? (in sh.c) */
589EXTERN bool isoutatty IZERO; /* is SHOUT a tty */
590EXTERN bool isdiagatty IZERO;/* is SHDIAG a tty */
591EXTERN bool is1atty IZERO; /* is file descriptor 1 a tty (didfds mode) */
592EXTERN bool is2atty IZERO; /* is file descriptor 2 a tty (didfds mode) */
593EXTERN bool arun IZERO; /* Currently running multi-line-aliases */
594EXTERN int implicit_cd IZERO;/* implicit cd enabled?(1=enabled,2=verbose) */
595EXTERN bool inheredoc IZERO; /* Currently parsing a heredoc */
596
597/*
598 * Global i/o info
599 */
600EXTERN Char *arginp IZERO; /* Argument input for sh -c and internal `xx` */
601EXTERN int onelflg IZERO; /* 2 -> need line for -t, 1 -> exit on read */
602extern Char *ffile; /* Name of shell file for $0 */
603extern bool dolzero; /* if $?0 should return true... */
604
605extern char *seterr; /* Error message from scanner/parser */
606#ifndef BSD4_4
607extern int errno; /* Error from C library routines */
608#endif
609extern int exitset;
610EXTERN Char *shtemp IZERO; /* Temp name for << shell files in /tmp */
611
612#ifdef BSDTIMES
613EXTERN struct timeval time0; /* Time at which the shell started */
614EXTERN struct sysrusage ru0;
615#else
616# ifdef _SEQUENT_
617EXTERN timeval_t time0; /* time at which shell started */
618EXTERN struct process_stats ru0;
619# else /* _SEQUENT_ */
620# ifndef POSIX
621EXTERN time_t time0; /* time at which shell started */
622# else /* POSIX */
623EXTERN clock_t time0; /* time at which shell started */
624EXTERN clock_t clk_tck;
625# endif /* POSIX */
626EXTERN struct tms shtimes; /* shell and child times for process timing */
627# endif /* _SEQUENT_ */
628EXTERN long seconds0;
629#endif /* BSDTIMES */
630
631#ifndef HZ
632# define HZ 100 /* for division into seconds */
633#endif
634
635/*
636 * Miscellany
637 */
638EXTERN Char *doldol; /* Character pid for $$ */
639EXTERN int backpid; /* pid of the last background job */
640
641/*
642 * Ideally these should be uid_t, gid_t, pid_t. I cannot do that right now
643 * cause pid's could be unsigned and that would break our -1 flag, and
644 * uid_t and gid_t are not defined in all the systems so I would have to
645 * make special cases for them. In the future...
646 */
647EXTERN int uid, euid, /* Invokers real and effective */
648 gid, egid; /* User and group ids */
649EXTERN int opgrp, /* Initial pgrp and tty pgrp */
650 shpgrp, /* Pgrp of shell */
651 tpgrp; /* Terminal process group */
652 /* If tpgrp is -1, leave tty alone! */
653
654EXTERN Char PromptBuf[INBUFSIZE*2]; /* buffer for the actual printed prompt.
655 * this must be large enough to contain
656 * the input line and the prompt, in
657 * case a correction occurred...
658 */
659EXTERN Char RPromptBuf[INBUFSIZE]; /* buffer for right-hand side prompt */
660
661/*
662 * To be able to redirect i/o for builtins easily, the shell moves the i/o
663 * descriptors it uses away from 0,1,2.
664 * Ideally these should be in units which are closed across exec's
665 * (this saves work) but for version 6, this is not usually possible.
666 * The desired initial values for these descriptors are defined in
667 * sh.local.h.
668 */
669EXTERN int SHIN IZERO; /* Current shell input (script) */
670EXTERN int SHOUT IZERO; /* Shell output */
671EXTERN int SHDIAG IZERO; /* Diagnostic output... shell errs go here */
672EXTERN int OLDSTD IZERO; /* Old standard input (def for cmds) */
673
674
675#if SYSVREL == 4 && defined(_UTS)
676/*
677 * From: fadden@uts.amdahl.com (Andy McFadden)
678 * we need sigsetjmp for UTS4, but not UTS2.1
679 */
680# define SIGSETJMP
681#endif
682
683/*
684 * Error control
685 *
686 * Errors in scanning and parsing set up an error message to be printed
687 * at the end and complete. Other errors always cause a reset.
688 * Because of source commands and .cshrc we need nested error catches.
689 */
690
691#ifdef NO_STRUCT_ASSIGNMENT
692
693# ifdef SIGSETJMP
694 typedef sigjmp_buf jmp_buf_t;
695 /* bugfix by Jak Kirman @ Brown U.: remove the (void) cast here, see sh.c */
696# define setexit() sigsetjmp(reslab)
697# define reset() siglongjmp(reslab, 1)
698# else
699 typedef jmp_buf jmp_buf_t;
700 /* bugfix by Jak Kirman @ Brown U.: remove the (void) cast here, see sh.c */
701# define setexit() setjmp(reslab)
702# define reset() longjmp(reslab, 1)
703# endif
704# define getexit(a) (void) memmove((ptr_t)&(a), (ptr_t)&reslab, sizeof(reslab))
705# define resexit(a) (void) memmove((ptr_t)&reslab, (ptr_t)&(a), sizeof(reslab))
706
707# define cpybin(a, b) (void) memmove((ptr_t)&(a), (ptr_t)&(b), sizeof(Bin))
708
709#else
710
711# ifdef SIGSETJMP
712 typedef struct { sigjmp_buf j; } jmp_buf_t;
713# define setexit() sigsetjmp(reslab.j)
714# define reset() siglongjmp(reslab.j, 1)
715# else
716 typedef struct { jmp_buf j; } jmp_buf_t;
717# define setexit() setjmp(reslab.j)
718# define reset() longjmp(reslab.j, 1)
719# endif
720
721# define getexit(a) (void) ((a) = reslab)
722# define resexit(a) (void) (reslab = (a))
723
724# define cpybin(a, b) (void) ((a) = (b))
725
726#endif /* NO_STRUCT_ASSIGNMENT */
727
728extern jmp_buf_t reslab;
729
730EXTERN Char *gointr; /* Label for an onintr transfer */
731
732extern signalfun_t parintr; /* Parents interrupt catch */
733extern signalfun_t parterm; /* Parents terminate catch */
734
735/*
736 * Lexical definitions.
737 *
738 * All lexical space is allocated dynamically.
739 * The eighth/sixteenth bit of characters is used to prevent recognition,
740 * and eventually stripped.
741 */
742#define META 0200
743#define ASCII 0177
744#ifdef SHORT_STRINGS
745# define QUOTE ((Char) 0100000)/* 16nth char bit used for 'ing */
746# define TRIM 0077777 /* Mask to strip quote bit */
747# define UNDER 0040000 /* Underline flag */
748# define BOLD 0020000 /* Bold flag */
749# define STANDOUT 0010000 /* Standout flag */
750# define LITERAL 0004000 /* Literal character flag */
751# define ATTRIBUTES 0074000 /* The bits used for attributes */
752# define CHAR 0000377 /* Mask to mask out the character */
753#else
754# define QUOTE ((Char) 0200) /* Eighth char bit used for 'ing */
755# define TRIM 0177 /* Mask to strip quote bit */
756# define UNDER 0000000 /* No extra bits to do both */
757# define BOLD 0000000 /* Bold flag */
758# define STANDOUT META /* Standout flag */
759# define LITERAL 0000000 /* Literal character flag */
760# define ATTRIBUTES 0200 /* The bits used for attributes */
761# define CHAR 0000177 /* Mask to mask out the character */
762#endif
763
764EXTERN int AsciiOnly; /* If set only 7 bits expected in characters */
765
766/*
767 * Each level of input has a buffered input structure.
768 * There are one or more blocks of buffered input for each level,
769 * exactly one if the input is seekable and tell is available.
770 * In other cases, the shell buffers enough blocks to keep all loops
771 * in the buffer.
772 */
773EXTERN struct Bin {
774 off_t Bfseekp; /* Seek pointer */
775 off_t Bfbobp; /* Seekp of beginning of buffers */
776 off_t Bfeobp; /* Seekp of end of buffers */
777 int Bfblocks; /* Number of buffer blocks */
778 Char **Bfbuf; /* The array of buffer blocks */
779} B;
780
781/*
782 * This structure allows us to seek inside aliases
783 */
784struct Ain {
785 int type;
786#define TCSH_I_SEEK 0 /* Invalid seek */
787#define TCSH_A_SEEK 1 /* Alias seek */
788#define TCSH_F_SEEK 2 /* File seek */
789#define TCSH_E_SEEK 3 /* Eval seek */
790 union {
791 off_t _f_seek;
792 Char* _c_seek;
793 } fc;
794#define f_seek fc._f_seek
795#define c_seek fc._c_seek
796 Char **a_seek;
797} ;
798
799extern int aret; /* Type of last char returned */
800#define SEEKEQ(a, b) ((a)->type == (b)->type && \
801 (a)->f_seek == (b)->f_seek && \
802 (a)->a_seek == (b)->a_seek)
803
804#define fseekp B.Bfseekp
805#define fbobp B.Bfbobp
806#define feobp B.Bfeobp
807#define fblocks B.Bfblocks
808#define fbuf B.Bfbuf
809
810/*
811 * The shell finds commands in loops by reseeking the input
812 * For whiles, in particular, it reseeks to the beginning of the
813 * line the while was on; hence the while placement restrictions.
814 */
815EXTERN struct Ain lineloc;
816
817EXTERN bool cantell; /* Is current source tellable ? */
818
819/*
820 * Input lines are parsed into doubly linked circular
821 * lists of words of the following form.
822 */
823struct wordent {
824 Char *word;
825 struct wordent *prev;
826 struct wordent *next;
827};
828
829/*
830 * During word building, both in the initial lexical phase and
831 * when expanding $ variable substitutions, expansion by `!' and `$'
832 * must be inhibited when reading ahead in routines which are themselves
833 * processing `!' and `$' expansion or after characters such as `\' or in
834 * quotations. The following flags are passed to the getC routines
835 * telling them which of these substitutions are appropriate for the
836 * next character to be returned.
837 */
838#define DODOL 1
839#define DOEXCL 2
840#define DOALL DODOL|DOEXCL
841
842/*
843 * Labuf implements a general buffer for lookahead during lexical operations.
844 * Text which is to be placed in the input stream can be stuck here.
845 * We stick parsed ahead $ constructs during initial input,
846 * process id's from `$$', and modified variable values (from qualifiers
847 * during expansion in sh.dol.c) here.
848 */
849EXTERN Char *lap;
850
851/*
852 * Parser structure
853 *
854 * Each command is parsed to a tree of command structures and
855 * flags are set bottom up during this process, to be propagated down
856 * as needed during the semantics/exeuction pass (sh.sem.c).
857 */
858struct command {
859 unsigned char t_dtyp; /* Type of node */
860#define NODE_COMMAND 1 /* t_dcom <t_dlef >t_drit */
861#define NODE_PAREN 2 /* ( t_dspr ) <t_dlef >t_drit */
862#define NODE_PIPE 3 /* t_dlef | t_drit */
863#define NODE_LIST 4 /* t_dlef ; t_drit */
864#define NODE_OR 5 /* t_dlef || t_drit */
865#define NODE_AND 6 /* t_dlef && t_drit */
866 unsigned char t_nice; /* Nice value */
867#ifdef apollo
868 unsigned char t_systype; /* System environment */
869#endif
870 unsigned long t_dflg; /* Flags, e.g. F_AMPERSAND|... */
871/* save these when re-doing */
872#ifndef apollo
873#define F_SAVE (F_NICE|F_TIME|F_NOHUP|F_HUP)
874#else
875#define F_SAVE (F_NICE|F_TIME|F_NOHUP||F_HUP|F_VER)
876#endif
877#define F_AMPERSAND (1<<0) /* executes in background */
878#define F_APPEND (1<<1) /* output is redirected >> */
879#define F_PIPEIN (1<<2) /* input is a pipe */
880#define F_PIPEOUT (1<<3) /* output is a pipe */
881#define F_NOFORK (1<<4) /* don't fork, last ()ized cmd */
882#define F_NOINTERRUPT (1<<5) /* should be immune from intr's */
883/* spare */
884#define F_STDERR (1<<7) /* redirect unit 2 with unit 1 */
885#define F_OVERWRITE (1<<8) /* output was ! */
886#define F_READ (1<<9) /* input redirection is << */
887#define F_REPEAT (1<<10) /* reexec aft if, repeat,... */
888#define F_NICE (1<<11) /* t_nice is meaningful */
889#define F_NOHUP (1<<12) /* nohup this command */
890#define F_TIME (1<<13) /* time this command */
891#define F_BACKQ (1<<14) /* command is in `` */
892#define F_HUP (1<<15) /* hup this command */
893#ifdef apollo
894#define F_VER (1<<16) /* execute command under SYSTYPE */
895#endif
896 union {
897 Char *T_dlef; /* Input redirect word */
898 struct command *T_dcar; /* Left part of list/pipe */
899 } L;
900 union {
901 Char *T_drit; /* Output redirect word */
902 struct command *T_dcdr; /* Right part of list/pipe */
903 } R;
904#define t_dlef L.T_dlef
905#define t_dcar L.T_dcar
906#define t_drit R.T_drit
907#define t_dcdr R.T_dcdr
908 Char **t_dcom; /* Command/argument vector */
909 struct command *t_dspr; /* Pointer to ()'d subtree */
910};
911
912
913/*
914 * The keywords for the parser
915 */
916#define TC_BREAK 0
917#define TC_BRKSW 1
918#define TC_CASE 2
919#define TC_DEFAULT 3
920#define TC_ELSE 4
921#define TC_END 5
922#define TC_ENDIF 6
923#define TC_ENDSW 7
924#define TC_EXIT 8
925#define TC_FOREACH 9
926#define TC_GOTO 10
927#define TC_IF 11
928#define TC_LABEL 12
929#define TC_LET 13
930#define TC_SET 14
931#define TC_SWITCH 15
932#define TC_TEST 16
933#define TC_THEN 17
934#define TC_WHILE 18
935
936/*
937 * These are declared here because they want to be
938 * initialized in sh.init.c (to allow them to be made readonly)
939 */
940
941#if defined(hpux) && defined(__STDC__) && !defined(__GNUC__)
942 /* Avoid hpux ansi mode spurious warnings */
943typedef void (*bfunc_t) ();
944#else
945typedef void (*bfunc_t) __P((Char **, struct command *));
946#endif /* hpux && __STDC__ && !__GNUC__ */
947
948extern struct biltins {
949 char *bname;
950 bfunc_t bfunct;
951 int minargs, maxargs;
952} bfunc[];
953extern int nbfunc;
954#ifdef WINNT_NATIVE
955extern struct biltins nt_bfunc[];
956extern int nt_nbfunc;
957#endif /* WINNT_NATIVE*/
958
959extern struct srch {
960 char *s_name;
961 int s_value;
962} srchn[];
963extern int nsrchn;
964
965/*
966 * Structure defining the existing while/foreach loops at this
967 * source level. Loops are implemented by seeking back in the
968 * input. For foreach (fe), the word list is attached here.
969 */
970EXTERN struct whyle {
971 struct Ain w_start; /* Point to restart loop */
972 struct Ain w_end; /* End of loop (0 if unknown) */
973 Char **w_fe, **w_fe0; /* Current/initial wordlist for fe */
974 Char *w_fename; /* Name for fe */
975 struct whyle *w_next; /* Next (more outer) loop */
976} *whyles;
977
978/*
979 * Variable structure
980 *
981 * Aliases and variables are stored in AVL balanced binary trees.
982 */
983EXTERN struct varent {
984 Char **vec; /* Array of words which is the value */
985 Char *v_name; /* Name of variable/alias */
986 int v_flags; /* Flags */
987#define VAR_ALL -1
988#define VAR_READONLY 1
989#define VAR_READWRITE 2
990#define VAR_NOGLOB 4
991#define VAR_FIRST 32
992#define VAR_LAST 64
993 struct varent *v_link[3]; /* The links, see below */
994 int v_bal; /* Balance factor */
995} shvhed IZERO_STRUCT, aliases IZERO_STRUCT;
996
997#define v_left v_link[0]
998#define v_right v_link[1]
999#define v_parent v_link[2]
1000
1001#define adrof(v) adrof1(v, &shvhed)
1002#define varval(v) value1(v, &shvhed)
1003
1004/*
1005 * The following are for interfacing redo substitution in
1006 * aliases to the lexical routines.
1007 */
1008EXTERN struct wordent *alhistp IZERO_STRUCT;/* Argument list (first) */
1009EXTERN struct wordent *alhistt IZERO_STRUCT;/* Node after last in arg list */
1010EXTERN Char **alvec IZERO_STRUCT,
1011 *alvecp IZERO_STRUCT;/* The (remnants of) alias vector */
1012
1013/*
1014 * Filename/command name expansion variables
1015 */
1016EXTERN int gflag; /* After tglob -> is globbing needed? */
1017
1018#define MAXVARLEN 30 /* Maximum number of char in a variable name */
1019
1020#ifndef MAXPATHLEN
1021# define MAXPATHLEN 2048
1022#endif /* MAXPATHLEN */
1023
1024#ifndef MAXNAMLEN
1025# define MAXNAMLEN 512
1026#endif /* MAXNAMLEN */
1027
1028#ifndef HAVENOLIMIT
1029/*
1030 * resource limits
1031 */
1032extern struct limits {
1033 int limconst;
1034 char *limname;
1035 int limdiv;
1036 char *limscale;
1037} limits[];
1038#endif /* !HAVENOLIMIT */
1039
1040/*
1041 * Variables for filename expansion
1042 */
1043extern Char **gargv; /* Pointer to the (stack) arglist */
1044extern int gargc; /* Number args in gargv */
1045
1046/*
1047 * Variables for command expansion.
1048 */
1049extern Char **pargv; /* Pointer to the argv list space */
1050EXTERN Char *pargs; /* Pointer to start current word */
1051EXTERN long pnleft; /* Number of chars left in pargs */
1052EXTERN Char *pargcp; /* Current index into pargs */
1053
1054/*
1055 * History list
1056 *
1057 * Each history list entry contains an embedded wordlist
1058 * from the scanner, a number for the event, and a reference count
1059 * to aid in discarding old entries.
1060 *
1061 * Essentially "invisible" entries are put on the history list
1062 * when history substitution includes modifiers, and thrown away
1063 * at the next discarding since their event numbers are very negative.
1064 */
1065EXTERN struct Hist {
1066 struct wordent Hlex;
1067 int Hnum;
1068 int Href;
1069 time_t Htime;
1070 Char *histline;
1071 struct Hist *Hnext;
1072} Histlist IZERO_STRUCT;
1073
1074EXTERN struct wordent paraml; /* Current lexical word list */
1075EXTERN int eventno; /* Next events number */
1076EXTERN int lastev; /* Last event reference (default) */
1077
1078EXTERN Char HIST; /* history invocation character */
1079EXTERN Char HISTSUB; /* auto-substitute character */
1080EXTERN Char PRCH; /* Prompt symbol for regular users */
1081EXTERN Char PRCHROOT; /* Prompt symbol for root */
1082
1083/*
1084 * For operating systems with single case filenames (OS/2)
1085 */
1086#ifdef CASE_INSENSITIVE
1087# define samecase(x) (isupper((unsigned char)(x)) ? \
1088 tolower((unsigned char)(x)) : (x))
1089#else
1090# define samecase(x) (x)
1091#endif /* CASE_INSENSITIVE */
1092
1093/*
1094 * strings.h:
1095 */
1096#ifndef SHORT_STRINGS
1097#define Strchr(a, b) strchr(a, b)
1098#define Strrchr(a, b) strrchr(a, b)
1099#define Strcat(a, b) strcat(a, b)
1100#define Strncat(a, b, c) strncat(a, b, c)
1101#define Strcpy(a, b) strcpy(a, b)
1102#define Strncpy(a, b, c) strncpy(a, b, c)
1103#define Strlen(a) strlen(a)
1104#define Strcmp(a, b) strcmp(a, b)
1105#define Strncmp(a, b, c) strncmp(a, b, c)
1106
1107#define Strspl(a, b) strspl(a, b)
1108#define Strsave(a) strsave(a)
1109#define Strend(a) strend(a)
1110#define Strstr(a, b) strstr(a, b)
1111
1112#define str2short(a) (a)
1113#define blk2short(a) saveblk(a)
1114#define short2blk(a) saveblk(a)
1115#define short2str(a) strip(a)
1116#else
1117#define Strchr(a, b) s_strchr(a, b)
1118#define Strrchr(a, b) s_strrchr(a, b)
1119#define Strcat(a, b) s_strcat(a, b)
1120#define Strncat(a, b, c) s_strncat(a, b, c)
1121#define Strcpy(a, b) s_strcpy(a, b)
1122#define Strncpy(a, b, c) s_strncpy(a, b, c)
1123#define Strlen(a) s_strlen(a)
1124#define Strcmp(a, b) s_strcmp(a, b)
1125#define Strncmp(a, b, c) s_strncmp(a, b, c)
1126
1127#define Strspl(a, b) s_strspl(a, b)
1128#define Strsave(a) s_strsave(a)
1129#define Strend(a) s_strend(a)
1130#define Strstr(a, b) s_strstr(a, b)
1131#endif
1132
1133/*
1134 * setname is a macro to save space (see sh.err.c)
1135 */
1136EXTERN char *bname;
1137
1138#define setname(a) (bname = (a))
1139
1140#ifdef VFORK
1141EXTERN Char *Vsav;
1142EXTERN Char *Vdp;
1143EXTERN Char *Vexpath;
1144EXTERN char **Vt;
1145#endif /* VFORK */
1146
1147EXTERN Char **evalvec;
1148EXTERN Char *evalp;
1149
1150extern struct mesg {
1151 char *iname; /* name from /usr/include */
1152 char *pname; /* print name */
1153} mesg[];
1154
1155/* word_chars is set by default to WORD_CHARS but can be overridden by
1156 the worchars variable--if unset, reverts to WORD_CHARS */
1157
1158EXTERN Char *word_chars;
1159
1160#define WORD_CHARS "*?_-.[]~=" /* default chars besides alnums in words */
1161
1162EXTERN Char *STR_SHELLPATH;
1163
1164#ifdef _PATH_BSHELL
1165EXTERN Char *STR_BSHELL;
1166#endif
1167EXTERN Char *STR_WORD_CHARS;
1168EXTERN Char **STR_environ IZERO;
1169
1170extern int dont_free; /* Tell free that we are in danger if we free */
1171
1172extern Char *INVPTR;
1173extern Char **INVPPTR;
1174
1175extern char *progname;
1176extern int tcsh;
1177
1178#include "tc.h"
1179#include "sh.decls.h"
1180
1181/*
1182 * To print system call errors...
1183 */
1184#ifdef BSD4_4
1185# include <errno.h>
1186#else
1187# ifndef linux
1188# ifdef NEEDstrerror
1189extern char *sys_errlist[];
1190# endif
1191extern int errno, sys_nerr;
1192# endif /* !linux */
1193#endif
1194
1195#ifndef WINNT_NATIVE
1196# ifdef NLS_CATALOGS
1197# ifdef linux
1198# include <locale.h>
1199# ifdef notdef
1200# include <localeinfo.h> /* Has this changed ? */
1201# endif
1202# include <features.h>
1203# endif
1204# ifdef SUNOS4
1205 /* Who stole my nl_types.h? :-(
1206 * All this stuff is in the man pages, but nowhere else?
1207 * This does not link right now...
1208 */
1209 typedef void *nl_catd;
1210 extern const char * catgets __P((nl_catd, int, int, const char *));
1211 nl_catd catopen __P((const char *, int));
1212 int catclose __P((nl_catd));
1213# else
1214# ifdef __uxps__
1215# define gettxt gettxt_ds
1216# endif
1217# include <nl_types.h>
1218# ifdef __uxps__
1219# undef gettxt
1220# endif
1221# endif
1222# ifndef MCLoadBySet
1223# define MCLoadBySet 0
1224# endif
1225EXTERN nl_catd catd;
1226# define CGETS(b, c, d) catgets(catd, b, c, d)
1227# define CSAVS(b, c, d) strsave(CGETS(b, c, d))
1228# else
1229# define CGETS(b, c, d) d
1230# define CSAVS(b, c, d) d
1231# endif
1232#else /* WINNT_NATIVE */
1233# define CGETS(b, c, d) nt_cgets( b, c, d)
1234# define CSAVS(b, c, d) strsave(CGETS(b, c, d))
1235#endif /* WINNT_NATIVE */
1236
1237/*
1238 * Since on some machines characters are unsigned, and the signed
1239 * keyword is not universally implemented, we treat all characters
1240 * as unsigned and sign extend them where we need.
1241 */
1242#define SIGN_EXTEND_CHAR(a) (((a) & 0x80) ? ((a) | ~0x7f) : (a))
1243
1244#endif /* _h_sh */
2/*
3 * sh.h: Catch it all globals and includes file!
4 */
5/*-
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37#ifndef _h_sh
38#define _h_sh
39
40#include "config.h"
41
42#ifndef EXTERN
43# define EXTERN extern
44#else /* !EXTERN */
45# ifdef WINNT_NATIVE
46# define IZERO = 0
47# define IZERO_STRUCT = {0}
48# endif /* WINNT_NATIVE */
49#endif /* EXTERN */
50
51#ifndef IZERO
52# define IZERO
53#endif /* IZERO */
54#ifndef IZERO_STRUCT
55# define IZERO_STRUCT
56# endif /* IZERO_STRUCT */
57
58#ifndef WINNT_NATIVE
59# define INIT_ZERO
60# define INIT_ZERO_STRUCT
61# define force_read read
62#endif /*!WINNT_NATIVE */
63/*
64 * Sanity
65 */
66#if defined(_POSIX_SOURCE) && !defined(POSIX)
67# define POSIX
68#endif
69
70#if defined(POSIXJOBS) && !defined(BSDJOBS)
71# define BSDJOBS
72#endif
73
74#if defined(POSIXSIGS) && !defined(BSDSIGS)
75# define BSDSIGS
76#endif
77
78#ifdef SHORT_STRINGS
79typedef short Char;
80typedef unsigned short uChar;
81# define SAVE(a) (Strsave(str2short(a)))
82#else
83typedef char Char;
84typedef unsigned char uChar;
85# define SAVE(a) (strsave(a))
86#endif
87
88/* Elide unused argument warnings */
89#define USE(a) (void) (a)
90/*
91 * If your compiler complains, then you can either
92 * throw it away and get gcc or, use the following define
93 * and get rid of the typedef.
94 * [The 4.2/3BSD vax compiler does not like that]
95 * Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com
96 */
97#ifdef SIGVOID
98# if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__)
99# define sigret_t void
100# else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */
101typedef void sigret_t;
102# endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */
103#else /* !SIGVOID */
104typedef int sigret_t;
105#endif /* SIGVOID */
106
107/*
108 * Return true if the path is absolute
109 */
110#ifndef WINNT_NATIVE
111# define ABSOLUTEP(p) (*(p) == '/')
112#else /* WINNT_NATIVE */
113# define ABSOLUTEP(p) ((p)[0] == '/' || \
114 (Isalpha((p)[0]) && (p)[1] == ':' && (p)[2] == '/'))
115#endif /* WINNT_NATIVE */
116
117/*
118 * Fundamental definitions which may vary from system to system.
119 *
120 * BUFSIZE The i/o buffering size; also limits word size
121 * MAILINTVL How often to mailcheck; more often is more expensive
122 */
123#ifdef BUFSIZE
124# if BUFSIZE < 4096
125# undef BUFSIZE
126# define BUFSIZE 4096 /* buffer size should be no less than this */
127# endif
128#else
129# define BUFSIZE 4096
130#endif /* BUFSIZE */
131
132#define FORKSLEEP 10 /* delay loop on non-interactive fork failure */
133#define MAILINTVL 600 /* 10 minutes */
134
135#ifndef INBUFSIZE
136# define INBUFSIZE 2*BUFSIZE /* Num input characters on the command line */
137#endif /* INBUFSIZE */
138
139
140/*
141 * What our builtin echo looks like
142 */
143#define NONE_ECHO 0
144#define BSD_ECHO 1
145#define SYSV_ECHO 2
146#define BOTH_ECHO (BSD_ECHO|SYSV_ECHO)
147
148#ifndef ECHO_STYLE
149# if SYSVREL > 0
150# define ECHO_STYLE SYSV_ECHO
151# else /* SYSVREL == 0 */
152# define ECHO_STYLE BSD_ECHO
153# endif /* SYSVREL */
154#endif /* ECHO_STYLE */
155
156/*
157 * The shell moves std in/out/diag and the old std input away from units
158 * 0, 1, and 2 so that it is easy to set up these standards for invoked
159 * commands.
160 */
161#define FSHTTY 15 /* /dev/tty when manip pgrps */
162#define FSHIN 16 /* Preferred desc for shell input */
163#define FSHOUT 17 /* ... shell output */
164#define FSHDIAG 18 /* ... shell diagnostics */
165#define FOLDSTD 19 /* ... old std input */
166
167#ifdef PROF
168#define xexit(n) done(n)
169#endif
170
171#ifdef cray
172# define word word_t /* sys/types.h defines word.. bad move! */
173#endif
174
175#include <sys/types.h>
176
177#ifdef cray
178# undef word
179#endif
180
181/*
182 * Path separator in environment variables
183 */
184#ifndef PATHSEP
185# if defined(__EMX__) || defined(WINNT_NATIVE)
186# define PATHSEP ';'
187# else /* unix */
188# define PATHSEP ':'
189# endif /* __EMX__ || WINNT_NATIVE */
190#endif /* !PATHSEP */
191
192#ifdef __HP_CXD_SPP
193# include <sys/cnx_stat.h>
194# define stat stat64
195# define fstat fstat64
196# define lstat lstat64
197#endif /* __HP_CXD_SPP */
198
199/*
200 * This macro compares the st_dev field of struct stat. On aix on ibmESA
201 * st_dev is a structure, so comparison does not work.
202 */
203#ifndef DEV_DEV_COMPARE
204# define DEV_DEV_COMPARE(x,y) ((x) == (y))
205#endif /* DEV_DEV_COMPARE */
206
207#ifdef _SEQUENT_
208# include <sys/procstats.h>
209#endif /* _SEQUENT_ */
210#if (defined(POSIX) || SYSVREL > 0) && !defined(WINNT_NATIVE)
211# include <sys/times.h>
212#endif /* (POSIX || SYSVREL > 0) && !WINNT_NATIVE */
213
214#ifdef NLS
215# include <locale.h>
216#endif /* NLS */
217
218
219#if !defined(_MINIX) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) && !defined(__MVS__)
220# include <sys/param.h>
221#endif /* !_MINIX && !_VMS_POSIX && !WINNT_NATIVE && !__MVS__ */
222#include <sys/stat.h>
223
224#if defined(BSDTIMES) || defined(BSDLIMIT)
225# include <sys/time.h>
226# if SYSVREL>3 && !defined(SCO) && !defined(sgi) && !defined(SNI) && !defined(sun) && !(defined(__alpha) && defined(__osf__)) && !defined(_SX) && !defined(__MVS__)
227# include "/usr/ucbinclude/sys/resource.h"
228# else
229# ifdef convex
230# define sysrusage cvxrusage
231# include <sys/sysinfo.h>
232# else
233# define sysrusage rusage
234# include <sys/resource.h>
235# endif /* convex */
236# endif /* SYSVREL>3 */
237#endif /* BSDTIMES */
238
239#ifndef WINNT_NATIVE
240# ifndef POSIX
241# ifdef TERMIO
242# include <termio.h>
243# else /* SGTTY */
244# include <sgtty.h>
245# endif /* TERMIO */
246# else /* POSIX */
247# ifndef _UWIN
248# include <termios.h>
249# else
250# include <termio.h>
251# endif /* _UWIN */
252# if SYSVREL > 3
253# undef TIOCGLTC /* we don't need those, since POSIX has them */
254# undef TIOCSLTC
255# undef CSWTCH
256# define CSWTCH _POSIX_VDISABLE /* So job control works */
257# endif /* SYSVREL > 3 */
258# endif /* POSIX */
259#endif /* WINNT_NATIVE */
260
261#ifdef sonyrisc
262# include <sys/ttold.h>
263#endif /* sonyrisc */
264
265#if defined(POSIX) && !defined(WINNT_NATIVE)
266/*
267 * We should be using setpgid and setpgid
268 * by now, but in some systems we use the
269 * old routines...
270 */
271# define getpgrp __getpgrp
272# define setpgrp __setpgrp
273# include <unistd.h>
274# undef getpgrp
275# undef setpgrp
276
277/*
278 * the gcc+protoize version of <stdlib.h>
279 * redefines malloc(), so we define the following
280 * to avoid it.
281 */
282# if defined(linux) || defined(sgi) || defined(_OSD_POSIX)
283# define NO_FIX_MALLOC
284# include <stdlib.h>
285# else /* linux */
286# define _GNU_STDLIB_H
287# define malloc __malloc
288# define free __free
289# define calloc __calloc
290# define realloc __realloc
291# include <stdlib.h>
292# undef malloc
293# undef free
294# undef calloc
295# undef realloc
296# endif /* linux || sgi */
297# include <limits.h>
298#endif /* POSIX && !WINNT_NATIVE */
299
300#if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX)
301# if !defined(pyr) && !defined(stellar)
302# include <time.h>
303# ifdef _MINIX
304# define HZ CLOCKS_PER_SEC
305# endif /* _MINIX */
306# endif /* !pyr && !stellar */
307#endif /* SYSVREL > 0 || _IBMR2 */
308
309/* In the following ifdef the DECOSF1 has been commented so that later
310 * versions of DECOSF1 will get TIOCGWINSZ. This might break older versions...
311 */
312#if !((defined(SUNOS4) || defined(_MINIX) /* || defined(DECOSF1) */) && defined(TERMIO))
313# if !defined(COHERENT) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE)
314# include <sys/ioctl.h>
315# endif
316#endif
317
318#if (defined(__DGUX__) && defined(POSIX)) || defined(DGUX)
319#undef CSWTCH
320#define CSWTCH _POSIX_VDISABLE
321#endif
322
323#if (!defined(FIOCLEX) && defined(SUNOS4)) || ((SYSVREL == 4) && !defined(_SEQUENT_) && !defined(SCO) && !defined(_SX)) && !defined(__MVS__)
324# include <sys/filio.h>
325#endif /* (!FIOCLEX && SUNOS4) || (SYSVREL == 4 && !_SEQUENT_ && !SCO && !_SX ) */
326
327#if !defined(_MINIX) && !defined(COHERENT) && !defined(supermax) && !defined(WINNT_NATIVE) && !defined(IRIS4D)
328# include <sys/file.h>
329#endif /* !_MINIX && !COHERENT && !supermax && !WINNT_NATIVE && !defined(IRIS4D) */
330
331#if !defined(O_RDONLY) || !defined(O_NDELAY)
332# include <fcntl.h>
333#endif
334
335#include <errno.h>
336
337#include <setjmp.h>
338
339#if __STDC__ || defined(FUNCPROTO)
340# include <stdarg.h>
341#else
342#ifdef _MINIX
343# include "mi.varargs.h"
344#else
345# include <varargs.h>
346#endif /* _MINIX */
347#endif
348
349#ifdef DIRENT
350# include <dirent.h>
351#else
352# ifdef hp9000s500
353# include <ndir.h>
354# else
355# include <sys/dir.h>
356# endif
357# define dirent direct
358#endif /* DIRENT */
359#if defined(hpux) || defined(sgi) || defined(OREO) || defined(COHERENT)
360# include <stdio.h> /* So the fgetpwent() prototypes work */
361#endif /* hpux || sgi || OREO || COHERENT */
362#ifndef WINNT_NATIVE
363#include <pwd.h>
364#include <grp.h>
365#endif /* WINNT_NATIVE */
366#ifdef PW_SHADOW
367# include <shadow.h>
368#endif /* PW_SHADOW */
369#ifdef PW_AUTH
370# include <auth.h>
371#endif /* PW_AUTH */
372#if defined(BSD) && !defined(POSIX)
373# include <strings.h>
374# define strchr(a, b) index(a, b)
375# define strrchr(a, b) rindex(a, b)
376#else
377# include <string.h>
378#endif /* BSD */
379
380/*
381 * IRIX-5.0 has <sys/cdefs.h>, but most system include files do not
382 * include it yet, so we include it here
383 */
384#if defined(sgi) && SYSVREL > 3
385# include <sys/cdefs.h>
386#endif /* sgi && SYSVREL > 3 */
387
388#ifdef REMOTEHOST
389# ifdef ISC
390# undef MAXHOSTNAMELEN /* Busted headers? */
391# endif
392
393# include <netinet/in.h>
394# include <arpa/inet.h>
395# include <sys/socket.h>
396# if defined(_SS_SIZE) || defined(_SS_MAXSIZE)
397# define INET6
398# endif
399# include <sys/uio.h> /* For struct iovec */
400#endif /* REMOTEHOST */
401
402/*
403 * ANSIisms... These must be *after* the system include and
404 * *before* our includes, so that BSDreno has time to define __P
405 */
406#undef __P
407#ifndef __P
408# if __STDC__ || defined(FUNCPROTO)
409# ifndef FUNCPROTO
410# define FUNCPROTO
411# endif
412# define __P(a) a
413# else
414# define __P(a) ()
415# if !__STDC__
416# define const
417# ifndef apollo
418# define volatile /* Apollo 'c' extensions need this */
419# endif /* apollo */
420# endif
421# endif
422#endif
423
424
425#ifdef PURIFY
426/* exit normally, allowing purify to trace leaks */
427# define _exit exit
428typedef int pret_t;
429#else /* !PURIFY */
430/*
431 * If your compiler complains, then you can either
432 * throw it away and get gcc or, use the following define
433 * and get rid of the typedef.
434 * [The 4.2/3BSD vax compiler does not like that]
435 * Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com
436 */
437# if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__)
438# define pret_t void
439# else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */
440typedef void pret_t;
441# endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */
442#endif /* PURIFY */
443
444typedef int bool;
445
446/*
447 * ASCII vs. EBCDIC
448 */
449#if 'Z' - 'A' == 25
450# ifndef IS_ASCII
451# define IS_ASCII
452# endif
453#endif
454
455#include "sh.types.h"
456
457#ifndef WINNT_NATIVE
458# ifndef POSIX
459extern pid_t getpgrp __P((int));
460# else /* POSIX */
461# if (defined(BSD) && !defined(BSD4_4)) || defined(SUNOS4) || defined(IRIS4D) || defined(DGUX)
462extern pid_t getpgrp __P((int));
463# else /* !(BSD || SUNOS4 || IRIS4D || DGUX) */
464extern pid_t getpgrp __P((void));
465# endif /* BSD || SUNOS4 || IRISD || DGUX */
466# endif /* POSIX */
467extern pid_t setpgrp __P((pid_t, pid_t));
468#endif /* !WINNT_NATIVE */
469
470typedef sigret_t (*signalfun_t) __P((int));
471
472#ifndef lint
473typedef ptr_t memalign_t;
474#else
475typedef union {
476 char am_char, *am_char_p;
477 short am_short, *am_short_p;
478 int am_int, *am_int_p;
479 long am_long, *am_long_p;
480 float am_float, *am_float_p;
481 double am_double, *am_double_p;
482} *memalign_t;
483
484# define malloc lint_malloc
485# define free lint_free
486# define realloc lint_realloc
487# define calloc lint_calloc
488#endif
489
490#ifdef MDEBUG
491extern memalign_t DebugMalloc __P((unsigned, char *, int));
492extern memalign_t DebugRealloc __P((ptr_t, unsigned, char *, int));
493extern memalign_t DebugCalloc __P((unsigned, unsigned, char *, int));
494extern void DebugFree __P((ptr_t, char *, int));
495# define xmalloc(i) DebugMalloc(i, __FILE__, __LINE__)
496# define xrealloc(p, i)((p) ? DebugRealloc(p, i, __FILE__, __LINE__) : \
497 DebugMalloc(i, __FILE__, __LINE__))
498# define xcalloc(n, s) DebugCalloc(n, s, __FILE__, __LINE__)
499# define xfree(p) if (p) DebugFree(p, __FILE__, __LINE__)
500#else
501# ifdef SYSMALLOC
502# define xmalloc(i) smalloc(i)
503# define xrealloc(p, i) srealloc(p, i)
504# define xcalloc(n, s) scalloc(n, s)
505# define xfree(p) sfree(p)
506# else
507# define xmalloc(i) malloc(i)
508# define xrealloc(p, i) realloc(p, i)
509# define xcalloc(n, s) calloc(n, s)
510# define xfree(p) free(p)
511# endif /* SYSMALLOC */
512#endif /* MDEBUG */
513#include "sh.char.h"
514#include "sh.err.h"
515#include "sh.dir.h"
516#include "sh.proc.h"
517
518#include "pathnames.h"
519
520
521/*
522 * C shell
523 *
524 * Bill Joy, UC Berkeley
525 * October, 1978; May 1980
526 *
527 * Jim Kulp, IIASA, Laxenburg Austria
528 * April, 1980
529 */
530
531#if !defined(MAXNAMLEN) && defined(_D_NAME_MAX)
532# define MAXNAMLEN _D_NAME_MAX
533#endif /* MAXNAMLEN */
534
535#ifdef HESIOD
536# include <hesiod.h>
537#endif /* HESIOD */
538
539#ifdef REMOTEHOST
540# include <netdb.h>
541#endif /* REMOTEHOST */
542
543#ifndef MAXHOSTNAMELEN
544# if defined(SCO) && (SYSVREL > 3)
545# include <sys/socket.h>
546# else
547# define MAXHOSTNAMELEN 255
548# endif
549#endif /* MAXHOSTNAMELEN */
550
551
552
553#define eq(a, b) (Strcmp(a, b) == 0)
554
555/* globone() flags */
556#define G_ERROR 0 /* default action: error if multiple words */
557#define G_IGNORE 1 /* ignore the rest of the words */
558#define G_APPEND 2 /* make a sentence by cat'ing the words */
559
560/*
561 * Global flags
562 */
563EXTERN bool chkstop IZERO; /* Warned of stopped jobs... allow exit */
564
565#if (defined(FIOCLEX) && defined(FIONCLEX)) || defined(F_SETFD)
566# define CLOSE_ON_EXEC
567#else
568EXTERN bool didcch IZERO; /* Have closed unused fd's for child */
569#endif /* (FIOCLEX && FIONCLEX) || F_SETFD */
570
571EXTERN bool didfds IZERO; /* Have setup i/o fd's for child */
572EXTERN bool doneinp IZERO; /* EOF indicator after reset from readc */
573EXTERN bool exiterr IZERO; /* Exit if error or non-zero exit status */
574EXTERN bool child IZERO; /* Child shell ... errors cause exit */
575EXTERN bool haderr IZERO; /* Reset was because of an error */
576EXTERN bool intty IZERO; /* Input is a tty */
577EXTERN bool intact IZERO; /* We are interactive... therefore prompt */
578EXTERN bool justpr IZERO; /* Just print because of :p hist mod */
579EXTERN bool loginsh IZERO; /* We are a loginsh -> .login/.logout */
580EXTERN bool neednote IZERO; /* Need to pnotify() */
581EXTERN bool noexec IZERO; /* Don't execute, just syntax check */
582EXTERN bool pjobs IZERO; /* want to print jobs if interrupted */
583EXTERN bool setintr IZERO; /* Set interrupts on/off -> Wait intr... */
584EXTERN bool timflg IZERO; /* Time the next waited for command */
585EXTERN bool havhash IZERO; /* path hashing is available */
586EXTERN bool editing IZERO; /* doing filename expansion and line editing */
587EXTERN bool noediting IZERO; /* initial $term defaulted to noedit */
588EXTERN bool bslash_quote IZERO;/* PWP: tcsh-style quoting? (in sh.c) */
589EXTERN bool isoutatty IZERO; /* is SHOUT a tty */
590EXTERN bool isdiagatty IZERO;/* is SHDIAG a tty */
591EXTERN bool is1atty IZERO; /* is file descriptor 1 a tty (didfds mode) */
592EXTERN bool is2atty IZERO; /* is file descriptor 2 a tty (didfds mode) */
593EXTERN bool arun IZERO; /* Currently running multi-line-aliases */
594EXTERN int implicit_cd IZERO;/* implicit cd enabled?(1=enabled,2=verbose) */
595EXTERN bool inheredoc IZERO; /* Currently parsing a heredoc */
596
597/*
598 * Global i/o info
599 */
600EXTERN Char *arginp IZERO; /* Argument input for sh -c and internal `xx` */
601EXTERN int onelflg IZERO; /* 2 -> need line for -t, 1 -> exit on read */
602extern Char *ffile; /* Name of shell file for $0 */
603extern bool dolzero; /* if $?0 should return true... */
604
605extern char *seterr; /* Error message from scanner/parser */
606#ifndef BSD4_4
607extern int errno; /* Error from C library routines */
608#endif
609extern int exitset;
610EXTERN Char *shtemp IZERO; /* Temp name for << shell files in /tmp */
611
612#ifdef BSDTIMES
613EXTERN struct timeval time0; /* Time at which the shell started */
614EXTERN struct sysrusage ru0;
615#else
616# ifdef _SEQUENT_
617EXTERN timeval_t time0; /* time at which shell started */
618EXTERN struct process_stats ru0;
619# else /* _SEQUENT_ */
620# ifndef POSIX
621EXTERN time_t time0; /* time at which shell started */
622# else /* POSIX */
623EXTERN clock_t time0; /* time at which shell started */
624EXTERN clock_t clk_tck;
625# endif /* POSIX */
626EXTERN struct tms shtimes; /* shell and child times for process timing */
627# endif /* _SEQUENT_ */
628EXTERN long seconds0;
629#endif /* BSDTIMES */
630
631#ifndef HZ
632# define HZ 100 /* for division into seconds */
633#endif
634
635/*
636 * Miscellany
637 */
638EXTERN Char *doldol; /* Character pid for $$ */
639EXTERN int backpid; /* pid of the last background job */
640
641/*
642 * Ideally these should be uid_t, gid_t, pid_t. I cannot do that right now
643 * cause pid's could be unsigned and that would break our -1 flag, and
644 * uid_t and gid_t are not defined in all the systems so I would have to
645 * make special cases for them. In the future...
646 */
647EXTERN int uid, euid, /* Invokers real and effective */
648 gid, egid; /* User and group ids */
649EXTERN int opgrp, /* Initial pgrp and tty pgrp */
650 shpgrp, /* Pgrp of shell */
651 tpgrp; /* Terminal process group */
652 /* If tpgrp is -1, leave tty alone! */
653
654EXTERN Char PromptBuf[INBUFSIZE*2]; /* buffer for the actual printed prompt.
655 * this must be large enough to contain
656 * the input line and the prompt, in
657 * case a correction occurred...
658 */
659EXTERN Char RPromptBuf[INBUFSIZE]; /* buffer for right-hand side prompt */
660
661/*
662 * To be able to redirect i/o for builtins easily, the shell moves the i/o
663 * descriptors it uses away from 0,1,2.
664 * Ideally these should be in units which are closed across exec's
665 * (this saves work) but for version 6, this is not usually possible.
666 * The desired initial values for these descriptors are defined in
667 * sh.local.h.
668 */
669EXTERN int SHIN IZERO; /* Current shell input (script) */
670EXTERN int SHOUT IZERO; /* Shell output */
671EXTERN int SHDIAG IZERO; /* Diagnostic output... shell errs go here */
672EXTERN int OLDSTD IZERO; /* Old standard input (def for cmds) */
673
674
675#if SYSVREL == 4 && defined(_UTS)
676/*
677 * From: fadden@uts.amdahl.com (Andy McFadden)
678 * we need sigsetjmp for UTS4, but not UTS2.1
679 */
680# define SIGSETJMP
681#endif
682
683/*
684 * Error control
685 *
686 * Errors in scanning and parsing set up an error message to be printed
687 * at the end and complete. Other errors always cause a reset.
688 * Because of source commands and .cshrc we need nested error catches.
689 */
690
691#ifdef NO_STRUCT_ASSIGNMENT
692
693# ifdef SIGSETJMP
694 typedef sigjmp_buf jmp_buf_t;
695 /* bugfix by Jak Kirman @ Brown U.: remove the (void) cast here, see sh.c */
696# define setexit() sigsetjmp(reslab)
697# define reset() siglongjmp(reslab, 1)
698# else
699 typedef jmp_buf jmp_buf_t;
700 /* bugfix by Jak Kirman @ Brown U.: remove the (void) cast here, see sh.c */
701# define setexit() setjmp(reslab)
702# define reset() longjmp(reslab, 1)
703# endif
704# define getexit(a) (void) memmove((ptr_t)&(a), (ptr_t)&reslab, sizeof(reslab))
705# define resexit(a) (void) memmove((ptr_t)&reslab, (ptr_t)&(a), sizeof(reslab))
706
707# define cpybin(a, b) (void) memmove((ptr_t)&(a), (ptr_t)&(b), sizeof(Bin))
708
709#else
710
711# ifdef SIGSETJMP
712 typedef struct { sigjmp_buf j; } jmp_buf_t;
713# define setexit() sigsetjmp(reslab.j)
714# define reset() siglongjmp(reslab.j, 1)
715# else
716 typedef struct { jmp_buf j; } jmp_buf_t;
717# define setexit() setjmp(reslab.j)
718# define reset() longjmp(reslab.j, 1)
719# endif
720
721# define getexit(a) (void) ((a) = reslab)
722# define resexit(a) (void) (reslab = (a))
723
724# define cpybin(a, b) (void) ((a) = (b))
725
726#endif /* NO_STRUCT_ASSIGNMENT */
727
728extern jmp_buf_t reslab;
729
730EXTERN Char *gointr; /* Label for an onintr transfer */
731
732extern signalfun_t parintr; /* Parents interrupt catch */
733extern signalfun_t parterm; /* Parents terminate catch */
734
735/*
736 * Lexical definitions.
737 *
738 * All lexical space is allocated dynamically.
739 * The eighth/sixteenth bit of characters is used to prevent recognition,
740 * and eventually stripped.
741 */
742#define META 0200
743#define ASCII 0177
744#ifdef SHORT_STRINGS
745# define QUOTE ((Char) 0100000)/* 16nth char bit used for 'ing */
746# define TRIM 0077777 /* Mask to strip quote bit */
747# define UNDER 0040000 /* Underline flag */
748# define BOLD 0020000 /* Bold flag */
749# define STANDOUT 0010000 /* Standout flag */
750# define LITERAL 0004000 /* Literal character flag */
751# define ATTRIBUTES 0074000 /* The bits used for attributes */
752# define CHAR 0000377 /* Mask to mask out the character */
753#else
754# define QUOTE ((Char) 0200) /* Eighth char bit used for 'ing */
755# define TRIM 0177 /* Mask to strip quote bit */
756# define UNDER 0000000 /* No extra bits to do both */
757# define BOLD 0000000 /* Bold flag */
758# define STANDOUT META /* Standout flag */
759# define LITERAL 0000000 /* Literal character flag */
760# define ATTRIBUTES 0200 /* The bits used for attributes */
761# define CHAR 0000177 /* Mask to mask out the character */
762#endif
763
764EXTERN int AsciiOnly; /* If set only 7 bits expected in characters */
765
766/*
767 * Each level of input has a buffered input structure.
768 * There are one or more blocks of buffered input for each level,
769 * exactly one if the input is seekable and tell is available.
770 * In other cases, the shell buffers enough blocks to keep all loops
771 * in the buffer.
772 */
773EXTERN struct Bin {
774 off_t Bfseekp; /* Seek pointer */
775 off_t Bfbobp; /* Seekp of beginning of buffers */
776 off_t Bfeobp; /* Seekp of end of buffers */
777 int Bfblocks; /* Number of buffer blocks */
778 Char **Bfbuf; /* The array of buffer blocks */
779} B;
780
781/*
782 * This structure allows us to seek inside aliases
783 */
784struct Ain {
785 int type;
786#define TCSH_I_SEEK 0 /* Invalid seek */
787#define TCSH_A_SEEK 1 /* Alias seek */
788#define TCSH_F_SEEK 2 /* File seek */
789#define TCSH_E_SEEK 3 /* Eval seek */
790 union {
791 off_t _f_seek;
792 Char* _c_seek;
793 } fc;
794#define f_seek fc._f_seek
795#define c_seek fc._c_seek
796 Char **a_seek;
797} ;
798
799extern int aret; /* Type of last char returned */
800#define SEEKEQ(a, b) ((a)->type == (b)->type && \
801 (a)->f_seek == (b)->f_seek && \
802 (a)->a_seek == (b)->a_seek)
803
804#define fseekp B.Bfseekp
805#define fbobp B.Bfbobp
806#define feobp B.Bfeobp
807#define fblocks B.Bfblocks
808#define fbuf B.Bfbuf
809
810/*
811 * The shell finds commands in loops by reseeking the input
812 * For whiles, in particular, it reseeks to the beginning of the
813 * line the while was on; hence the while placement restrictions.
814 */
815EXTERN struct Ain lineloc;
816
817EXTERN bool cantell; /* Is current source tellable ? */
818
819/*
820 * Input lines are parsed into doubly linked circular
821 * lists of words of the following form.
822 */
823struct wordent {
824 Char *word;
825 struct wordent *prev;
826 struct wordent *next;
827};
828
829/*
830 * During word building, both in the initial lexical phase and
831 * when expanding $ variable substitutions, expansion by `!' and `$'
832 * must be inhibited when reading ahead in routines which are themselves
833 * processing `!' and `$' expansion or after characters such as `\' or in
834 * quotations. The following flags are passed to the getC routines
835 * telling them which of these substitutions are appropriate for the
836 * next character to be returned.
837 */
838#define DODOL 1
839#define DOEXCL 2
840#define DOALL DODOL|DOEXCL
841
842/*
843 * Labuf implements a general buffer for lookahead during lexical operations.
844 * Text which is to be placed in the input stream can be stuck here.
845 * We stick parsed ahead $ constructs during initial input,
846 * process id's from `$$', and modified variable values (from qualifiers
847 * during expansion in sh.dol.c) here.
848 */
849EXTERN Char *lap;
850
851/*
852 * Parser structure
853 *
854 * Each command is parsed to a tree of command structures and
855 * flags are set bottom up during this process, to be propagated down
856 * as needed during the semantics/exeuction pass (sh.sem.c).
857 */
858struct command {
859 unsigned char t_dtyp; /* Type of node */
860#define NODE_COMMAND 1 /* t_dcom <t_dlef >t_drit */
861#define NODE_PAREN 2 /* ( t_dspr ) <t_dlef >t_drit */
862#define NODE_PIPE 3 /* t_dlef | t_drit */
863#define NODE_LIST 4 /* t_dlef ; t_drit */
864#define NODE_OR 5 /* t_dlef || t_drit */
865#define NODE_AND 6 /* t_dlef && t_drit */
866 unsigned char t_nice; /* Nice value */
867#ifdef apollo
868 unsigned char t_systype; /* System environment */
869#endif
870 unsigned long t_dflg; /* Flags, e.g. F_AMPERSAND|... */
871/* save these when re-doing */
872#ifndef apollo
873#define F_SAVE (F_NICE|F_TIME|F_NOHUP|F_HUP)
874#else
875#define F_SAVE (F_NICE|F_TIME|F_NOHUP||F_HUP|F_VER)
876#endif
877#define F_AMPERSAND (1<<0) /* executes in background */
878#define F_APPEND (1<<1) /* output is redirected >> */
879#define F_PIPEIN (1<<2) /* input is a pipe */
880#define F_PIPEOUT (1<<3) /* output is a pipe */
881#define F_NOFORK (1<<4) /* don't fork, last ()ized cmd */
882#define F_NOINTERRUPT (1<<5) /* should be immune from intr's */
883/* spare */
884#define F_STDERR (1<<7) /* redirect unit 2 with unit 1 */
885#define F_OVERWRITE (1<<8) /* output was ! */
886#define F_READ (1<<9) /* input redirection is << */
887#define F_REPEAT (1<<10) /* reexec aft if, repeat,... */
888#define F_NICE (1<<11) /* t_nice is meaningful */
889#define F_NOHUP (1<<12) /* nohup this command */
890#define F_TIME (1<<13) /* time this command */
891#define F_BACKQ (1<<14) /* command is in `` */
892#define F_HUP (1<<15) /* hup this command */
893#ifdef apollo
894#define F_VER (1<<16) /* execute command under SYSTYPE */
895#endif
896 union {
897 Char *T_dlef; /* Input redirect word */
898 struct command *T_dcar; /* Left part of list/pipe */
899 } L;
900 union {
901 Char *T_drit; /* Output redirect word */
902 struct command *T_dcdr; /* Right part of list/pipe */
903 } R;
904#define t_dlef L.T_dlef
905#define t_dcar L.T_dcar
906#define t_drit R.T_drit
907#define t_dcdr R.T_dcdr
908 Char **t_dcom; /* Command/argument vector */
909 struct command *t_dspr; /* Pointer to ()'d subtree */
910};
911
912
913/*
914 * The keywords for the parser
915 */
916#define TC_BREAK 0
917#define TC_BRKSW 1
918#define TC_CASE 2
919#define TC_DEFAULT 3
920#define TC_ELSE 4
921#define TC_END 5
922#define TC_ENDIF 6
923#define TC_ENDSW 7
924#define TC_EXIT 8
925#define TC_FOREACH 9
926#define TC_GOTO 10
927#define TC_IF 11
928#define TC_LABEL 12
929#define TC_LET 13
930#define TC_SET 14
931#define TC_SWITCH 15
932#define TC_TEST 16
933#define TC_THEN 17
934#define TC_WHILE 18
935
936/*
937 * These are declared here because they want to be
938 * initialized in sh.init.c (to allow them to be made readonly)
939 */
940
941#if defined(hpux) && defined(__STDC__) && !defined(__GNUC__)
942 /* Avoid hpux ansi mode spurious warnings */
943typedef void (*bfunc_t) ();
944#else
945typedef void (*bfunc_t) __P((Char **, struct command *));
946#endif /* hpux && __STDC__ && !__GNUC__ */
947
948extern struct biltins {
949 char *bname;
950 bfunc_t bfunct;
951 int minargs, maxargs;
952} bfunc[];
953extern int nbfunc;
954#ifdef WINNT_NATIVE
955extern struct biltins nt_bfunc[];
956extern int nt_nbfunc;
957#endif /* WINNT_NATIVE*/
958
959extern struct srch {
960 char *s_name;
961 int s_value;
962} srchn[];
963extern int nsrchn;
964
965/*
966 * Structure defining the existing while/foreach loops at this
967 * source level. Loops are implemented by seeking back in the
968 * input. For foreach (fe), the word list is attached here.
969 */
970EXTERN struct whyle {
971 struct Ain w_start; /* Point to restart loop */
972 struct Ain w_end; /* End of loop (0 if unknown) */
973 Char **w_fe, **w_fe0; /* Current/initial wordlist for fe */
974 Char *w_fename; /* Name for fe */
975 struct whyle *w_next; /* Next (more outer) loop */
976} *whyles;
977
978/*
979 * Variable structure
980 *
981 * Aliases and variables are stored in AVL balanced binary trees.
982 */
983EXTERN struct varent {
984 Char **vec; /* Array of words which is the value */
985 Char *v_name; /* Name of variable/alias */
986 int v_flags; /* Flags */
987#define VAR_ALL -1
988#define VAR_READONLY 1
989#define VAR_READWRITE 2
990#define VAR_NOGLOB 4
991#define VAR_FIRST 32
992#define VAR_LAST 64
993 struct varent *v_link[3]; /* The links, see below */
994 int v_bal; /* Balance factor */
995} shvhed IZERO_STRUCT, aliases IZERO_STRUCT;
996
997#define v_left v_link[0]
998#define v_right v_link[1]
999#define v_parent v_link[2]
1000
1001#define adrof(v) adrof1(v, &shvhed)
1002#define varval(v) value1(v, &shvhed)
1003
1004/*
1005 * The following are for interfacing redo substitution in
1006 * aliases to the lexical routines.
1007 */
1008EXTERN struct wordent *alhistp IZERO_STRUCT;/* Argument list (first) */
1009EXTERN struct wordent *alhistt IZERO_STRUCT;/* Node after last in arg list */
1010EXTERN Char **alvec IZERO_STRUCT,
1011 *alvecp IZERO_STRUCT;/* The (remnants of) alias vector */
1012
1013/*
1014 * Filename/command name expansion variables
1015 */
1016EXTERN int gflag; /* After tglob -> is globbing needed? */
1017
1018#define MAXVARLEN 30 /* Maximum number of char in a variable name */
1019
1020#ifndef MAXPATHLEN
1021# define MAXPATHLEN 2048
1022#endif /* MAXPATHLEN */
1023
1024#ifndef MAXNAMLEN
1025# define MAXNAMLEN 512
1026#endif /* MAXNAMLEN */
1027
1028#ifndef HAVENOLIMIT
1029/*
1030 * resource limits
1031 */
1032extern struct limits {
1033 int limconst;
1034 char *limname;
1035 int limdiv;
1036 char *limscale;
1037} limits[];
1038#endif /* !HAVENOLIMIT */
1039
1040/*
1041 * Variables for filename expansion
1042 */
1043extern Char **gargv; /* Pointer to the (stack) arglist */
1044extern int gargc; /* Number args in gargv */
1045
1046/*
1047 * Variables for command expansion.
1048 */
1049extern Char **pargv; /* Pointer to the argv list space */
1050EXTERN Char *pargs; /* Pointer to start current word */
1051EXTERN long pnleft; /* Number of chars left in pargs */
1052EXTERN Char *pargcp; /* Current index into pargs */
1053
1054/*
1055 * History list
1056 *
1057 * Each history list entry contains an embedded wordlist
1058 * from the scanner, a number for the event, and a reference count
1059 * to aid in discarding old entries.
1060 *
1061 * Essentially "invisible" entries are put on the history list
1062 * when history substitution includes modifiers, and thrown away
1063 * at the next discarding since their event numbers are very negative.
1064 */
1065EXTERN struct Hist {
1066 struct wordent Hlex;
1067 int Hnum;
1068 int Href;
1069 time_t Htime;
1070 Char *histline;
1071 struct Hist *Hnext;
1072} Histlist IZERO_STRUCT;
1073
1074EXTERN struct wordent paraml; /* Current lexical word list */
1075EXTERN int eventno; /* Next events number */
1076EXTERN int lastev; /* Last event reference (default) */
1077
1078EXTERN Char HIST; /* history invocation character */
1079EXTERN Char HISTSUB; /* auto-substitute character */
1080EXTERN Char PRCH; /* Prompt symbol for regular users */
1081EXTERN Char PRCHROOT; /* Prompt symbol for root */
1082
1083/*
1084 * For operating systems with single case filenames (OS/2)
1085 */
1086#ifdef CASE_INSENSITIVE
1087# define samecase(x) (isupper((unsigned char)(x)) ? \
1088 tolower((unsigned char)(x)) : (x))
1089#else
1090# define samecase(x) (x)
1091#endif /* CASE_INSENSITIVE */
1092
1093/*
1094 * strings.h:
1095 */
1096#ifndef SHORT_STRINGS
1097#define Strchr(a, b) strchr(a, b)
1098#define Strrchr(a, b) strrchr(a, b)
1099#define Strcat(a, b) strcat(a, b)
1100#define Strncat(a, b, c) strncat(a, b, c)
1101#define Strcpy(a, b) strcpy(a, b)
1102#define Strncpy(a, b, c) strncpy(a, b, c)
1103#define Strlen(a) strlen(a)
1104#define Strcmp(a, b) strcmp(a, b)
1105#define Strncmp(a, b, c) strncmp(a, b, c)
1106
1107#define Strspl(a, b) strspl(a, b)
1108#define Strsave(a) strsave(a)
1109#define Strend(a) strend(a)
1110#define Strstr(a, b) strstr(a, b)
1111
1112#define str2short(a) (a)
1113#define blk2short(a) saveblk(a)
1114#define short2blk(a) saveblk(a)
1115#define short2str(a) strip(a)
1116#else
1117#define Strchr(a, b) s_strchr(a, b)
1118#define Strrchr(a, b) s_strrchr(a, b)
1119#define Strcat(a, b) s_strcat(a, b)
1120#define Strncat(a, b, c) s_strncat(a, b, c)
1121#define Strcpy(a, b) s_strcpy(a, b)
1122#define Strncpy(a, b, c) s_strncpy(a, b, c)
1123#define Strlen(a) s_strlen(a)
1124#define Strcmp(a, b) s_strcmp(a, b)
1125#define Strncmp(a, b, c) s_strncmp(a, b, c)
1126
1127#define Strspl(a, b) s_strspl(a, b)
1128#define Strsave(a) s_strsave(a)
1129#define Strend(a) s_strend(a)
1130#define Strstr(a, b) s_strstr(a, b)
1131#endif
1132
1133/*
1134 * setname is a macro to save space (see sh.err.c)
1135 */
1136EXTERN char *bname;
1137
1138#define setname(a) (bname = (a))
1139
1140#ifdef VFORK
1141EXTERN Char *Vsav;
1142EXTERN Char *Vdp;
1143EXTERN Char *Vexpath;
1144EXTERN char **Vt;
1145#endif /* VFORK */
1146
1147EXTERN Char **evalvec;
1148EXTERN Char *evalp;
1149
1150extern struct mesg {
1151 char *iname; /* name from /usr/include */
1152 char *pname; /* print name */
1153} mesg[];
1154
1155/* word_chars is set by default to WORD_CHARS but can be overridden by
1156 the worchars variable--if unset, reverts to WORD_CHARS */
1157
1158EXTERN Char *word_chars;
1159
1160#define WORD_CHARS "*?_-.[]~=" /* default chars besides alnums in words */
1161
1162EXTERN Char *STR_SHELLPATH;
1163
1164#ifdef _PATH_BSHELL
1165EXTERN Char *STR_BSHELL;
1166#endif
1167EXTERN Char *STR_WORD_CHARS;
1168EXTERN Char **STR_environ IZERO;
1169
1170extern int dont_free; /* Tell free that we are in danger if we free */
1171
1172extern Char *INVPTR;
1173extern Char **INVPPTR;
1174
1175extern char *progname;
1176extern int tcsh;
1177
1178#include "tc.h"
1179#include "sh.decls.h"
1180
1181/*
1182 * To print system call errors...
1183 */
1184#ifdef BSD4_4
1185# include <errno.h>
1186#else
1187# ifndef linux
1188# ifdef NEEDstrerror
1189extern char *sys_errlist[];
1190# endif
1191extern int errno, sys_nerr;
1192# endif /* !linux */
1193#endif
1194
1195#ifndef WINNT_NATIVE
1196# ifdef NLS_CATALOGS
1197# ifdef linux
1198# include <locale.h>
1199# ifdef notdef
1200# include <localeinfo.h> /* Has this changed ? */
1201# endif
1202# include <features.h>
1203# endif
1204# ifdef SUNOS4
1205 /* Who stole my nl_types.h? :-(
1206 * All this stuff is in the man pages, but nowhere else?
1207 * This does not link right now...
1208 */
1209 typedef void *nl_catd;
1210 extern const char * catgets __P((nl_catd, int, int, const char *));
1211 nl_catd catopen __P((const char *, int));
1212 int catclose __P((nl_catd));
1213# else
1214# ifdef __uxps__
1215# define gettxt gettxt_ds
1216# endif
1217# include <nl_types.h>
1218# ifdef __uxps__
1219# undef gettxt
1220# endif
1221# endif
1222# ifndef MCLoadBySet
1223# define MCLoadBySet 0
1224# endif
1225EXTERN nl_catd catd;
1226# define CGETS(b, c, d) catgets(catd, b, c, d)
1227# define CSAVS(b, c, d) strsave(CGETS(b, c, d))
1228# else
1229# define CGETS(b, c, d) d
1230# define CSAVS(b, c, d) d
1231# endif
1232#else /* WINNT_NATIVE */
1233# define CGETS(b, c, d) nt_cgets( b, c, d)
1234# define CSAVS(b, c, d) strsave(CGETS(b, c, d))
1235#endif /* WINNT_NATIVE */
1236
1237/*
1238 * Since on some machines characters are unsigned, and the signed
1239 * keyword is not universally implemented, we treat all characters
1240 * as unsigned and sign extend them where we need.
1241 */
1242#define SIGN_EXTEND_CHAR(a) (((a) & 0x80) ? ((a) | ~0x7f) : (a))
1243
1244#endif /* _h_sh */