2 * sh.h: Catch it all globals and includes file!
5 * Copyright (c) 1980, 1991 The Regents of the University of California.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 #ifdef HAVE_INTTYPES_H
49 # include <inttypes.h>
52 #if !defined(HAVE_STDINT_H) && !defined(HAVE_INTTYPES_H) && !defined(WINNT_NATIVE)
53 typedef unsigned long intptr_t;
57 # define EXTERN extern
61 # define IZERO_STRUCT = {0}
62 # endif /* WINNT_NATIVE */
70 #endif /* IZERO_STRUCT */
74 # define INIT_ZERO_STRUCT
75 # define force_read xread
76 #endif /*!WINNT_NATIVE */
78 #if defined(KANJI) && defined(WIDE_STRINGS) && defined(HAVE_NL_LANGINFO) && defined(CODESET)
84 #if defined(_POSIX_SOURCE) && !defined(POSIX)
88 #if defined(POSIXJOBS) && !defined(BSDJOBS)
92 #define TMP_TEMPLATE ".XXXXXX"
100 typedef wchar_t Char;
102 typedef unsigned long uChar;
103 typedef wint_t eChar; /* Can contain any Char value or CHAR_ERR */
104 #define CHAR_ERR WEOF /* Pretty please, use bit 31... */
105 #define normal_mbtowc(PWC, S, N) rt_mbtowc(PWC, S, N)
106 #define reset_mbtowc() TCSH_IGNORE(mbtowc(NULL, NULL, 0))
109 typedef unsigned short uChar;
111 #define CHAR_ERR (-1)
112 #define normal_mbtowc(PWC, S, N) ((void)(N), *(PWC) = (unsigned char)*(S), 1)
113 #define reset_mbtowc() ((void)0)
115 # define SAVE(a) (Strsave(str2short(a)))
118 typedef unsigned char uChar;
120 #define CHAR_ERR (-1)
121 #define normal_mbtowc(PWC, S, N) ((void)(N), *(PWC) = (unsigned char)*(S), 1)
122 #define reset_mbtowc() ((void)0)
123 # define SAVE(a) (strsave(a))
126 #if !defined(__inline) && !defined(__GNUC__) && !defined(_MSC_VER)
130 #define TCSH_PTRDIFF_T_FMT "I"
132 #define TCSH_PTRDIFF_T_FMT "t"
134 /* Elide unused argument warnings */
135 #define USE(a) (void) (a)
136 #define TCSH_IGNORE(a) tcsh_ignore((intptr_t)a)
137 static __inline void tcsh_ignore(intptr_t a)
143 * Return true if the path is absolute
145 #if defined(WINNT_NATIVE)
146 # define ABSOLUTEP(p) ((p)[0] == '/' || \
147 (Isalpha((p)[0]) && (p)[1] == ':'))
148 #elif defined(__CYGWIN__)
149 # define ABSOLUTEP(p) ((p)[0] == '/' || \
150 (Isalpha((p)[0]) && (p)[1] == ':' && \
151 ((p)[2] == '\0' || (p)[2] == '/')))
152 #else /* !WINNT_NATIVE && !__CYGWIN__ */
153 # define ABSOLUTEP(p) (*(p) == '/')
154 #endif /* WINNT_NATIVE || __CYGWIN__ */
157 * Fundamental definitions which may vary from system to system.
159 * BUFSIZE The i/o buffering size; also limits word size
160 * MAILINTVL How often to mailcheck; more often is more expensive
165 # define BUFSIZE 4096 /* buffer size should be no less than this */
168 # define BUFSIZE 4096
171 #define FORKSLEEP 10 /* delay loop on non-interactive fork failure */
172 #define MAILINTVL 600 /* 10 minutes */
175 # define INBUFSIZE 2*BUFSIZE /* Num input characters on the command line */
176 #endif /* INBUFSIZE */
180 * What our builtin echo looks like
185 #define BOTH_ECHO (BSD_ECHO|SYSV_ECHO)
189 # define ECHO_STYLE SYSV_ECHO
190 # else /* SYSVREL == 0 */
191 # define ECHO_STYLE BSD_ECHO
192 # endif /* SYSVREL */
193 #endif /* ECHO_STYLE */
195 /* values for noclobber */
196 #define NOCLOBBER_DEFAULT 1
197 #define NOCLOBBER_NOTEMPTY 2
198 #define NOCLOBBER_ASK 4
201 * The shell moves std in/out/diag and the old std input away from units
202 * 0, 1, and 2 so that it is easy to set up these standards for invoked
205 #define FSAFE 5 /* We keep the first 5 descriptors untouched */
206 #define FSHTTY 15 /* /dev/tty when manip pgrps */
207 #define FSHIN 16 /* Preferred desc for shell input */
208 #define FSHOUT 17 /* ... shell output */
209 #define FSHDIAG 18 /* ... shell diagnostics */
210 #define FOLDSTD 19 /* ... old std input */
213 #define xexit(n) done(n)
217 # define word word_t /* sys/types.h defines word.. bad move! */
220 #include <sys/types.h>
227 * Path separator in environment variables
230 # if defined(__EMX__) || defined(WINNT_NATIVE)
234 # endif /* __EMX__ || WINNT_NATIVE */
235 #endif /* !PATHSEP */
237 #if defined(__HP_CXD_SPP) && !defined(__hpux)
238 # include <sys/cnx_stat.h>
240 # define fstat fstat64
241 # define lstat lstat64
242 #endif /* __HP_CXD_SPP && !__hpux */
244 #ifdef HAVE_LONG_LONG
245 typedef long long tcsh_number_t;
247 typedef long tcsh_number_t;
250 * This macro compares the st_dev field of struct stat. On aix on ibmESA
251 * st_dev is a structure, so comparison does not work.
253 #ifndef DEV_DEV_COMPARE
254 # define DEV_DEV_COMPARE(x,y) ((x) == (y))
255 #endif /* DEV_DEV_COMPARE */
258 # include <sys/procstats.h>
259 #endif /* _SEQUENT_ */
260 #if (defined(POSIX) || SYSVREL > 0) && !defined(WINNT_NATIVE)
261 # include <sys/times.h>
262 #endif /* (POSIX || SYSVREL > 0) && !WINNT_NATIVE */
268 #if !defined(_MINIX) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) && !defined(__MVS__)
269 # include <sys/param.h>
270 #endif /* !_MINIX && !_VMS_POSIX && !WINNT_NATIVE && !__MVS__ */
271 #include <sys/stat.h>
273 #if defined(BSDTIMES) || defined(BSDLIMIT)
274 # include <sys/time.h>
275 # if SYSVREL>3 && !defined(SCO) && !defined(sgi) && !defined(SNI) && !defined(sun) && !(defined(__alpha) && defined(__osf__)) && !defined(_SX) && !defined(__MVS__)
276 # include "/usr/ucbinclude/sys/resource.h"
279 # define sysrusage cvxrusage
280 # include <sys/sysinfo.h>
282 # define sysrusage rusage
283 # include <sys/resource.h>
285 # endif /* SYSVREL>3 */
286 #endif /* BSDTIMES */
297 # include <termios.h>
301 # if SYSVREL > 3 || defined(__linux__)
302 # undef TIOCGLTC /* we don't need those, since POSIX has them */
305 # define CSWTCH _POSIX_VDISABLE /* So job control works */
306 # endif /* SYSVREL > 3 */
308 #endif /* WINNT_NATIVE */
311 # include <sys/ttold.h>
312 #endif /* sonyrisc */
314 #if defined(POSIX) && !defined(WINNT_NATIVE)
318 * the gcc+protoize version of <stdlib.h>
319 * redefines malloc(), so we define the following
322 # if defined(SYSMALLOC) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__) || defined(sgi) || defined(_OSD_POSIX)
323 # define NO_FIX_MALLOC
326 # define _GNU_STDLIB_H
327 # define malloc __malloc
329 # define calloc __calloc
330 # define realloc __realloc
336 # endif /* glibc || sgi */
337 #endif /* POSIX && !WINNT_NATIVE */
340 #if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
341 # if !defined(pyr) && !defined(stellar)
344 # define HZ CLOCKS_PER_SEC
346 # endif /* !pyr && !stellar */
347 #endif /* SYSVREL > 0 || _IBMR2 */
349 /* In the following ifdef the DECOSF1 has been commented so that later
350 * versions of DECOSF1 will get TIOCGWINSZ. This might break older versions...
352 #if !((defined(SUNOS4) || defined(_MINIX) /* || defined(DECOSF1) */) && defined(TERMIO))
353 # if !defined(_VMS_POSIX) && !defined(WINNT_NATIVE)
354 # include <sys/ioctl.h>
355 # if SYSVREL > 3 || defined(__linux__)
356 # undef TIOCGLTC /* we don't need those, since POSIX has them */
359 # define CSWTCH _POSIX_VDISABLE /* So job control works */
360 # endif /* SYSVREL > 3 */
364 #if (defined(__DGUX__) && defined(POSIX)) || defined(DGUX)
366 #define CSWTCH _POSIX_VDISABLE
369 #if (!defined(FIOCLEX) && defined(SUNOS4)) || ((SYSVREL == 4) && !defined(_SEQUENT_) && !defined(SCO) && !defined(_SX)) && !defined(__MVS__)
370 # include <sys/filio.h>
371 #endif /* (!FIOCLEX && SUNOS4) || (SYSVREL == 4 && !_SEQUENT_ && !SCO && !_SX ) */
373 #if !defined(_MINIX) && !defined(supermax) && !defined(WINNT_NATIVE) && !defined(IRIS4D)
374 # include <sys/file.h>
375 #endif /* !_MINIX && !supermax && !WINNT_NATIVE && !defined(IRIS4D) */
377 #if !defined(O_RDONLY) || !defined(O_NDELAY)
393 # include <sys/dir.h>
395 # define dirent direct
396 #endif /* HAVE_DIRENT_H */
397 #ifndef HAVE_STRUCT_DIRENT_D_INO
398 # define d_ino d_fileno
400 #if defined(hpux) || defined(sgi) || defined(OREO)
401 # include <stdio.h> /* So the fgetpwent() prototypes work */
402 #endif /* hpux || sgi || OREO */
406 #endif /* WINNT_NATIVE */
409 #endif /* HAVE_SHADOW_H */
412 #endif /* HAVE_AUTH_H */
413 #if defined(BSD) && !defined(POSIX)
414 # include <strings.h>
415 # define strchr(a, b) index(a, b)
416 # define strrchr(a, b) rindex(a, b)
422 * IRIX-5.0 has <sys/cdefs.h>, but most system include files do not
423 * include it yet, so we include it here
425 #if defined(sgi) && SYSVREL > 3
426 # include <sys/cdefs.h>
427 #endif /* sgi && SYSVREL > 3 */
431 # undef MAXHOSTNAMELEN /* Busted headers? */
434 # include <netinet/in.h>
435 # include <arpa/inet.h>
436 # include <sys/socket.h>
437 # if (defined(_SS_SIZE) || defined(_SS_MAXSIZE)) && defined(HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY)
438 # if !defined(__APPLE__) /* Damnit, where is getnameinfo() folks? */
442 # endif /* __APPLE__ */
444 # include <sys/uio.h> /* For struct iovec */
445 #endif /* REMOTEHOST */
448 /* exit normally, allowing purify to trace leaks */
461 #include "sh.types.h"
463 #if !HAVE_DECL_GETPGRP
464 # ifndef GETPGRP_VOID
465 extern pid_t getpgrp (int);
467 extern pid_t getpgrp (void);
472 typedef ptr_t memalign_t;
475 char am_char, *am_char_p;
476 short am_short, *am_short_p;
477 int am_int, *am_int_p;
478 long am_long, *am_long_p;
479 float am_float, *am_float_p;
480 double am_double, *am_double_p;
483 # define malloc lint_malloc
484 # define free lint_free
485 # define realloc lint_realloc
486 # define calloc lint_calloc
490 # define xmalloc(i) smalloc(i)
491 # define xrealloc(p, i) srealloc(p, i)
492 # define xcalloc(n, s) scalloc(n, s)
495 # define xmalloc(i) malloc(i)
496 # define xrealloc(p, i) realloc(p, i)
497 # define xcalloc(n, s) calloc(n, s)
499 #endif /* SYSMALLOC */
505 #include "pathnames.h"
511 * Bill Joy, UC Berkeley
512 * October, 1978; May 1980
514 * Jim Kulp, IIASA, Laxenburg Austria
524 #endif /* REMOTEHOST */
526 #ifndef MAXHOSTNAMELEN
527 # ifdef HOST_NAME_MAX
528 # define MAXHOSTNAMELEN (HOST_NAME_MAX + 1)
529 # elif defined(SCO) && (SYSVREL > 3)
530 # include <sys/socket.h>
532 # define MAXHOSTNAMELEN 256
534 #endif /* MAXHOSTNAMELEN */
538 #define eq(a, b) (Strcmp(a, b) == 0)
540 /* globone() flags */
541 #define G_ERROR 0 /* default action: error if multiple words */
542 #define G_IGNORE 1 /* ignore the rest of the words */
543 #define G_APPEND 2 /* make a sentence by cat'ing the words */
548 EXTERN int chkstop IZERO; /* Warned of stopped jobs... allow exit */
550 #if (defined(FIOCLEX) && defined(FIONCLEX)) || defined(F_SETFD)
551 # define CLOSE_ON_EXEC
553 EXTERN int didcch IZERO; /* Have closed unused fd's for child */
554 #endif /* (FIOCLEX && FIONCLEX) || F_SETFD */
556 EXTERN int didfds IZERO; /* Have setup i/o fd's for child */
557 EXTERN int doneinp IZERO; /* EOF indicator after reset from readc */
558 EXTERN int exiterr IZERO; /* Exit if error or non-zero exit status */
559 EXTERN int child IZERO; /* Child shell ... errors cause exit */
560 EXTERN int haderr IZERO; /* Reset was because of an error */
561 EXTERN int intty IZERO; /* Input is a tty */
562 EXTERN int intact IZERO; /* We are interactive... therefore prompt */
563 EXTERN int justpr IZERO; /* Just print because of :p hist mod */
564 EXTERN int loginsh IZERO; /* We are a loginsh -> .login/.logout */
565 EXTERN int neednote IZERO; /* Need to pnotify() */
566 EXTERN int noexec IZERO; /* Don't execute, just syntax check */
567 EXTERN int pjobs IZERO; /* want to print jobs if interrupted */
568 EXTERN int setintr IZERO; /* Set interrupts on/off -> Wait intr... */
569 EXTERN int handle_interrupt IZERO;/* Are we currently handling an interrupt? */
570 EXTERN int havhash IZERO; /* path hashing is available */
571 EXTERN int editing IZERO; /* doing filename expansion and line editing */
572 EXTERN int noediting IZERO; /* initial $term defaulted to noedit */
573 EXTERN int bslash_quote IZERO;/* PWP: tcsh-style quoting? (in sh.c) */
574 EXTERN int anyerror IZERO; /* propagate errors from pipelines/backq */
575 EXTERN int compat_expr IZERO;/* csh-style expressions? */
576 EXTERN int isoutatty IZERO; /* is SHOUT a tty */
577 EXTERN int isdiagatty IZERO;/* is SHDIAG a tty */
578 EXTERN int is1atty IZERO; /* is file descriptor 1 a tty (didfds mode) */
579 EXTERN int is2atty IZERO; /* is file descriptor 2 a tty (didfds mode) */
580 EXTERN int arun IZERO; /* Currently running multi-line-aliases */
581 EXTERN int implicit_cd IZERO;/* implicit cd enabled?(1=enabled,2=verbose) */
582 EXTERN int cdtohome IZERO; /* cd without args goes home */
583 EXTERN int inheredoc IZERO; /* Currently parsing a heredoc */
584 EXTERN int no_clobber IZERO; /* no clobber enabled? 1=yes 2=notempty, 4=ask*/
585 /* We received a window change event */
586 EXTERN volatile sig_atomic_t windowchg IZERO;
587 #if defined(KANJI) && defined(SHORT_STRINGS) && defined(DSPMBYTE)
588 EXTERN int dspmbyte_ls;
594 EXTERN Char *arginp IZERO; /* Argument input for sh -c and internal `xx` */
595 EXTERN int onelflg IZERO; /* 2 -> need line for -t, 1 -> exit on read */
596 extern Char *ffile; /* Name of shell file for $0 */
597 extern int dolzero; /* if $?0 should return true... */
599 extern char *seterr; /* Error message from scanner/parser */
601 extern int errno; /* Error from C library routines */
604 /* Temp name for << shell files in /tmp, for xfree() */
605 EXTERN Char *shtemp IZERO;
608 EXTERN struct timeval time0; /* Time at which the shell started */
609 EXTERN struct sysrusage ru0;
612 EXTERN timeval_t time0; /* time at which shell started */
613 EXTERN struct process_stats ru0;
614 # else /* _SEQUENT_ */
616 EXTERN time_t time0; /* time at which shell started */
618 EXTERN clock_t time0; /* time at which shell started */
619 EXTERN clock_t clk_tck;
621 EXTERN struct tms shtimes; /* shell and child times for process timing */
622 # endif /* _SEQUENT_ */
623 EXTERN time_t seconds0;
624 #endif /* BSDTIMES */
627 # define HZ 100 /* for division into seconds */
633 EXTERN pid_t mainpid; /* pid of the main shell ($$) */
634 EXTERN Char *doldol; /* Character pid for $$ */
635 EXTERN pid_t backpid; /* pid of the last background job */
639 * Ideally these should be uid_t, gid_t, pid_t. I cannot do that right now
640 * cause pid's could be unsigned and that would break our -1 flag, and
641 * uid_t and gid_t are not defined in all the systems so I would have to
642 * make special cases for them. In the future...
644 EXTERN uid_t uid, euid; /* Invokers real and effective */
645 EXTERN gid_t gid, egid; /* User and group ids */
646 EXTERN pid_t opgrp, /* Initial pgrp and tty pgrp */
647 shpgrp, /* Pgrp of shell */
648 tpgrp; /* Terminal process group */
649 /* If tpgrp is -1, leave tty alone! */
651 EXTERN Char *Prompt; /* The actual printed prompt or NULL */
652 EXTERN Char *RPrompt; /* Right-hand side prompt or NULL */
655 * To be able to redirect i/o for builtins easily, the shell moves the i/o
656 * descriptors it uses away from 0,1,2.
657 * Ideally these should be in units which are closed across exec's
658 * (this saves work) but for version 6, this is not usually possible.
659 * The desired initial values for these descriptors are defined in
662 EXTERN int SHIN IZERO; /* Current shell input (script) */
663 EXTERN int SHOUT IZERO; /* Shell output */
664 EXTERN int SHDIAG IZERO; /* Diagnostic output... shell errs go here */
665 EXTERN int OLDSTD IZERO; /* Old standard input (def for cmds) */
668 #if (SYSVREL == 4 && defined(_UTS)) || defined(__linux__)
670 * From: fadden@uts.amdahl.com (Andy McFadden)
671 * we need sigsetjmp for UTS4, but not UTS2.1
679 * Errors in scanning and parsing set up an error message to be printed
680 * at the end and complete. Other errors always cause a reset.
681 * Because of source commands and .cshrc we need nested error catches.
685 typedef struct { const char *f; size_t l; sigjmp_buf j; } jmp_buf_t;
686 # define tcsh_setjmp() sigsetjmp(reslab.j, 1)
687 # define tcsh_longjmp() siglongjmp(reslab.j, 1)
689 typedef struct { const char *f; size_t l; jmp_buf j; } jmp_buf_t;
690 # define tcsh_setjmp() setjmp(reslab.j)
691 # define tcsh_longjmp() longjmp(reslab.j, 1)
694 #define setexit() (reslab.f = __func__, \
695 reslab.l = __LINE__, \
698 # define _reset() xprintf("reset %s %zu\n", reslab.f, reslab.l), \
699 flush(), tcsh_longjmp()
701 # define _reset() tcsh_longjmp()
704 #define getexit(a) (void) ((a) = reslab)
705 #define resexit(a) (void) (reslab = (a))
707 #define cpybin(a, b) (void) ((a) = (b))
709 extern jmp_buf_t reslab;
711 EXTERN Char *gointr; /* Label for an onintr transfer */
713 extern struct sigaction parintr; /* Parents interrupt catch */
714 extern struct sigaction parterm; /* Parents terminate catch */
717 * Lexical definitions.
719 * All lexical space is allocated dynamically.
720 * The eighth/sixteenth bit of characters is used to prevent recognition,
721 * and eventually stripped.
725 #ifdef WIDE_STRINGS /* Implies SHORT_STRINGS */
726 /* 31st char bit used for 'ing (not 32nd, we want all values nonnegative) */
730 * By fix for handling unicode name file, 32nd bit is used.
731 * We need use '&' instead of '> or <' when comparing with INVALID_BYTE etc..
732 * Cast to uChar is not recommended,
733 * becase Char is 4bytes but uChar is 8bytes on I32LP64. */
734 # define QUOTE 0x80000000
735 # define TRIM 0x7FFFFFFF /* Mask to strip quote bit */
736 # define UNDER 0x08000000 /* Underline flag */
737 # define BOLD 0x04000000 /* Bold flag */
738 # define STANDOUT 0x02000000 /* Standout flag */
739 # define LITERAL 0x01000000 /* Literal character flag */
740 # define ATTRIBUTES 0x0F000000 /* The bits used for attributes */
741 # define INVALID_BYTE 0xF0000000 /* Invalid character on input */
743 # define CHAR 0x30FFFFFF /* Mask to mask out the character */
745 # define CHAR 0x00FFFFFF /* Mask to mask out the character */
747 #elif defined (SHORT_STRINGS)
748 # define QUOTE ((Char) 0100000)/* 16nth char bit used for 'ing */
749 # define TRIM 0073777 /* Mask to strip quote/lit bit */
750 # define UNDER 0040000 /* Underline flag */
751 # define BOLD 0020000 /* Bold flag */
752 # define STANDOUT 0010000 /* Standout flag */
753 # define LITERAL 0004000 /* Literal character flag */
754 # define ATTRIBUTES 0074000 /* The bits used for attributes */
755 # define INVALID_BYTE 0
756 # define CHAR 0000377 /* Mask to mask out the character */
758 # define QUOTE ((Char) 0200) /* Eighth char bit used for 'ing */
759 # define TRIM 0177 /* Mask to strip quote bit */
760 # define UNDER 0000000 /* No extra bits to do both */
761 # define BOLD 0000000 /* Bold flag */
762 # define STANDOUT META /* Standout flag */
763 # define LITERAL 0000000 /* Literal character flag */
764 # define ATTRIBUTES 0200 /* The bits used for attributes */
765 # define INVALID_BYTE 0
766 # define CHAR 0000177 /* Mask to mask out the character */
768 #define CHAR_DBWIDTH (LITERAL|(LITERAL-1))
770 # define MAX_UTF32 0x7FFFFFFF /* max UTF32 is U+7FFFFFFF */
772 EXTERN int AsciiOnly; /* If set only 7 bits expected in characters */
775 * Each level of input has a buffered input structure.
776 * There are one or more blocks of buffered input for each level,
777 * exactly one if the input is seekable and tell is available.
778 * In other cases, the shell buffers enough blocks to keep all loops
781 * If (WIDE_STRINGS && cantell), fbobp is always a byte offset, but
782 * (fseekp - fbobp) and (feobp - fbobp) are character offsets (usable for
785 * If (!cantell), all offsets are character offsets; if (!WIDE_STRINGS), there
786 * is no difference between byte and character offsets.
789 off_t Bfseekp; /* Seek pointer, generally != lseek() value */
790 off_t Bfbobp; /* Seekp of beginning of buffers */
791 off_t Bfeobp; /* Seekp of end of buffers */
792 int Bfblocks; /* Number of buffer blocks */
793 Char **Bfbuf; /* The array of buffer blocks */
795 /* Number of bytes in each character if (cantell) */
796 unsigned char Bfclens[BUFSIZE + 1];
801 * This structure allows us to seek inside aliases
805 #define TCSH_I_SEEK 0 /* Invalid seek */
806 #define TCSH_A_SEEK 1 /* Alias seek */
807 #define TCSH_F_SEEK 2 /* File seek */
808 #define TCSH_E_SEEK 3 /* Eval seek */
810 off_t _f_seek; /* A byte offset if (cantell) */
813 #define f_seek fc._f_seek
814 #define c_seek fc._c_seek
818 extern int aret; /* Type of last char returned */
819 #define SEEKEQ(a, b) ((a)->type == (b)->type && \
820 (a)->f_seek == (b)->f_seek && \
821 (a)->a_seek == (b)->a_seek)
823 #define fseekp B.Bfseekp
824 #define fbobp B.Bfbobp
825 #define feobp B.Bfeobp
826 #define fblocks B.Bfblocks
828 #define fclens B.Bfclens
831 * The shell finds commands in loops by reseeking the input
832 * For whiles, in particular, it reseeks to the beginning of the
833 * line the while was on; hence the while placement restrictions.
835 EXTERN struct Ain lineloc;
837 EXTERN int cantell; /* Is current source tellable ? */
840 * Input lines are parsed into doubly linked circular
841 * lists of words of the following form.
845 struct wordent *prev;
846 struct wordent *next;
850 * During word building, both in the initial lexical phase and
851 * when expanding $ variable substitutions, expansion by `!' and `$'
852 * must be inhibited when reading ahead in routines which are themselves
853 * processing `!' and `$' expansion or after characters such as `\' or in
854 * quotations. The following flags are passed to the getC routines
855 * telling them which of these substitutions are appropriate for the
856 * next character to be returned.
860 #define DOALL DODOL|DOEXCL
863 * Labuf implements a general buffer for lookahead during lexical operations.
864 * Text which is to be placed in the input stream can be stuck here.
865 * We stick parsed ahead $ constructs during initial input,
866 * process id's from `$$', and modified variable values (from qualifiers
867 * during expansion in sh.dol.c) here.
869 extern struct Strbuf labuf;
870 EXTERN size_t lap; /* N/A if == labuf.len, index into labuf.s otherwise */
875 * Each command is parsed to a tree of command structures and
876 * flags are set bottom up during this process, to be propagated down
877 * as needed during the semantics/exeuction pass (sh.sem.c).
880 unsigned char t_dtyp; /* Type of node */
881 #define NODE_COMMAND 1 /* t_dcom <t_dlef >t_drit */
882 #define NODE_PAREN 2 /* ( t_dspr ) <t_dlef >t_drit */
883 #define NODE_PIPE 3 /* t_dlef | t_drit */
884 #define NODE_LIST 4 /* t_dlef ; t_drit */
885 #define NODE_OR 5 /* t_dlef || t_drit */
886 #define NODE_AND 6 /* t_dlef && t_drit */
887 unsigned char t_nice; /* Nice value */
889 unsigned char t_systype; /* System environment */
891 unsigned long t_dflg; /* Flags, e.g. F_AMPERSAND|... */
892 /* save these when re-doing */
894 #define F_SAVE (F_NICE|F_TIME|F_NOHUP|F_HUP)
896 #define F_SAVE (F_NICE|F_TIME|F_NOHUP||F_HUP|F_VER)
898 #define F_AMPERSAND (1<<0) /* executes in background */
899 #define F_APPEND (1<<1) /* output is redirected >> */
900 #define F_PIPEIN (1<<2) /* input is a pipe */
901 #define F_PIPEOUT (1<<3) /* output is a pipe */
902 #define F_NOFORK (1<<4) /* don't fork, last ()ized cmd */
903 #define F_NOINTERRUPT (1<<5) /* should be immune from intr's */
905 #define F_STDERR (1<<7) /* redirect unit 2 with unit 1 */
906 #define F_OVERWRITE (1<<8) /* output was ! */
907 #define F_READ (1<<9) /* input redirection is << */
908 #define F_REPEAT (1<<10) /* reexec aft if, repeat,... */
909 #define F_NICE (1<<11) /* t_nice is meaningful */
910 #define F_NOHUP (1<<12) /* nohup this command */
911 #define F_TIME (1<<13) /* time this command */
912 #define F_BACKQ (1<<14) /* command is in `` */
913 #define F_HUP (1<<15) /* hup this command */
915 #define F_VER (1<<16) /* execute command under SYSTYPE */
918 Char *T_dlef; /* Input redirect word */
919 struct command *T_dcar; /* Left part of list/pipe */
922 Char *T_drit; /* Output redirect word */
923 struct command *T_dcdr; /* Right part of list/pipe */
925 #define t_dlef L.T_dlef
926 #define t_dcar L.T_dcar
927 #define t_drit R.T_drit
928 #define t_dcdr R.T_dcdr
929 Char **t_dcom; /* Command/argument vector */
930 struct command *t_dspr; /* Pointer to ()'d subtree */
935 * The keywords for the parser
958 * These are declared here because they want to be
959 * initialized in sh.init.c (to allow them to be made readonly)
962 #if defined(hpux) && defined(__STDC__) && !defined(__GNUC__)
963 /* Avoid hpux ansi mode spurious warnings */
964 typedef void (*bfunc_t) ();
966 typedef void (*bfunc_t) (Char **, struct command *);
967 #endif /* hpux && __STDC__ && !__GNUC__ */
969 extern const struct biltins {
972 int minargs, maxargs;
976 extern struct biltins nt_bfunc[];
977 extern int nt_nbfunc;
978 #endif /* WINNT_NATIVE*/
988 * Structure defining the existing while/foreach loops at this
989 * source level. Loops are implemented by seeking back in the
990 * input. For foreach (fe), the word list is attached here.
992 EXTERN struct whyle {
993 struct Ain w_start; /* Point to restart loop */
994 struct Ain w_end; /* End of loop (0 if unknown) */
995 Char **w_fe, **w_fe0; /* Current/initial wordlist for fe */
996 Char *w_fename; /* Name for fe */
997 struct whyle *w_next; /* Next (more outer) loop */
1001 * Variable structure
1003 * Aliases and variables are stored in AVL balanced binary trees.
1005 EXTERN struct varent {
1006 Char **vec; /* Array of words which is the value */
1007 Char *v_name; /* Name of variable/alias */
1008 int v_flags; /* Flags */
1010 #define VAR_READONLY 1
1011 #define VAR_READWRITE 2
1012 #define VAR_NOGLOB 4
1013 #define VAR_FIRST 32
1015 struct varent *v_link[3]; /* The links, see below */
1016 int v_bal; /* Balance factor */
1017 } shvhed IZERO_STRUCT, aliases IZERO_STRUCT;
1019 #define v_left v_link[0]
1020 #define v_right v_link[1]
1021 #define v_parent v_link[2]
1023 #define adrof(v) adrof1(v, &shvhed)
1024 #define varval(v) value1(v, &shvhed)
1027 * The following are for interfacing redo substitution in
1028 * aliases to the lexical routines.
1030 EXTERN struct wordent *alhistp IZERO_STRUCT;/* Argument list (first) */
1031 EXTERN struct wordent *alhistt IZERO_STRUCT;/* Node after last in arg list */
1032 EXTERN Char **alvec IZERO_STRUCT,
1033 *alvecp IZERO_STRUCT;/* The (remnants of) alias vector */
1036 * Filename/command name expansion variables
1041 # define MAXPATHLEN PATH_MAX
1043 # define MAXPATHLEN 2048
1045 #endif /* MAXPATHLEN */
1051 extern struct limits {
1053 const char *limname;
1055 const char *limscale;
1057 #endif /* !HAVENOLIMIT */
1062 * Each history list entry contains an embedded wordlist
1063 * from the scanner, a number for the event, and a reference count
1064 * to aid in discarding old entries.
1066 * Essentially "invisible" entries are put on the history list
1067 * when history substitution includes modifiers, and thrown away
1068 * at the next discarding since their event numbers are very negative.
1070 EXTERN struct Hist {
1071 struct wordent Hlex;
1072 int Hnum; /* eventno when inserted into history list */
1076 struct Hist *Hnext, *Hprev; /* doubly linked list */
1077 unsigned Hhash; /* hash value of command line */
1078 } Histlist IZERO_STRUCT;
1080 extern struct wordent paraml; /* Current lexical word list */
1081 EXTERN int eventno; /* Next events number */
1082 EXTERN int lastev; /* Last event reference (default) */
1084 EXTERN Char HIST; /* history invocation character */
1085 EXTERN Char HISTSUB; /* auto-substitute character */
1086 EXTERN Char PRCH; /* Prompt symbol for regular users */
1087 EXTERN Char PRCHROOT; /* Prompt symbol for root */
1090 * For operating systems with single case filenames (OS/2)
1092 #ifdef CASE_INSENSITIVE
1093 # ifdef WIDE_STRINGS
1094 # define samecase(x) (towlower(x))
1096 # define samecase(x) (isupper((unsigned char)(x)) ? \
1097 tolower((unsigned char)(x)) : (x))
1100 # define samecase(x) (x)
1101 #endif /* CASE_INSENSITIVE */
1106 #ifndef SHORT_STRINGS
1107 #define Strchr(a, b) strchr(a, b)
1108 #define Strrchr(a, b) strrchr(a, b)
1109 #define Strcat(a, b) strcat(a, b)
1110 #define Strncat(a, b, c) strncat(a, b, c)
1111 #define Strcpy(a, b) strcpy(a, b)
1112 #define Strncpy(a, b, c) strncpy(a, b, c)
1113 #define Strlen(a) strlen(a)
1114 #define Strcmp(a, b) strcmp(a, b)
1115 #define Strncmp(a, b, c) strncmp(a, b, c)
1116 #define Strcasecmp(a, b) strcasecmp(a, b)
1118 #define Strspl(a, b) strspl(a, b)
1119 #define Strnsave(a, b) strnsave(a, b)
1120 #define Strsave(a) strsave(a)
1121 #define Strend(a) strend(a)
1122 #define Strstr(a, b) strstr(a, b)
1124 #define str2short(a) (a)
1125 #define blk2short(a) saveblk(a)
1126 #define short2blk(a) saveblk(a)
1127 #define short2str(a) caching_strip(a)
1129 #if defined(WIDE_STRINGS) && !defined(UTF16_STRINGS)
1130 #define Strchr(a, b) wcschr(a, b)
1131 #define Strrchr(a, b) wcsrchr(a, b)
1132 #define Strcat(a, b) wcscat(a, b)
1133 #define Strncat(a, b, c) wcsncat(a, b, c)
1134 #define Strcpy(a, b) wcscpy(a, b)
1135 #define Strncpy(a, b, c) wcsncpy(a, b, c)
1136 #define Strlen(a) wcslen(a)
1137 #define Strcmp(a, b) wcscmp(a, b)
1138 #define Strncmp(a, b, c) wcsncmp(a, b, c)
1140 #define Strchr(a, b) s_strchr(a, b)
1141 #define Strrchr(a, b) s_strrchr(a, b)
1142 #define Strcat(a, b) s_strcat(a, b)
1143 #define Strncat(a, b, c) s_strncat(a, b, c)
1144 #define Strcpy(a, b) s_strcpy(a, b)
1145 #define Strncpy(a, b, c) s_strncpy(a, b, c)
1146 #define Strlen(a) s_strlen(a)
1147 #define Strcmp(a, b) s_strcmp(a, b)
1148 #define Strncmp(a, b, c) s_strncmp(a, b, c)
1150 #define Strcasecmp(a, b) s_strcasecmp(a, b)
1152 #define Strspl(a, b) s_strspl(a, b)
1153 #define Strnsave(a, b) s_strnsave(a, b)
1154 #define Strsave(a) s_strsave(a)
1155 #define Strend(a) s_strend(a)
1156 #define Strstr(a, b) s_strstr(a, b)
1160 * setname is a macro to save space (see sh.err.c)
1162 EXTERN const char *bname;
1164 #define setname(a) (bname = (a))
1169 EXTERN Char *Vexpath;
1173 EXTERN Char **evalvec;
1176 extern struct mesg {
1177 const char *iname; /* name from /usr/include */
1178 const char *pname; /* print name */
1181 /* word_chars is set by default to WORD_CHARS (or WORD_CHARS_VI) but can
1182 be overridden by the wordchars variable--if unset, reverts to
1183 WORD_CHARS (or WORD_CHARS_VI) */
1185 EXTERN Char *word_chars;
1187 #define WORD_CHARS "*?_-.[]~=" /* default chars besides alnums in words */
1188 #define WORD_CHARS_VI "_" /* default chars besides alnums in words */
1190 EXTERN Char *STR_SHELLPATH;
1193 EXTERN Char *STR_BSHELL;
1195 EXTERN Char *STR_WORD_CHARS;
1196 EXTERN Char *STR_WORD_CHARS_VI;
1197 EXTERN Char **STR_environ IZERO;
1199 extern int dont_free; /* Tell free that we are in danger if we free */
1201 extern Char *INVPTR;
1202 extern Char **INVPPTR;
1204 extern char *progname;
1206 extern int xlate_cr;
1207 extern int output_raw;
1209 extern time_t Htime;
1211 extern int insource;
1212 extern char linbuf[];
1216 extern int use_fork;
1218 extern int tellwhat;
1219 extern int NoNLSRebind;
1220 #if !HAVE_DECL_ENVIRON
1221 extern char **environ;
1226 #ifndef WINNT_NATIVE
1227 # ifdef NLS_CATALOGS
1228 # ifdef HAVE_FEATURES_H
1229 # include <features.h>
1231 # ifdef HAVE_NL_LANGINFO
1232 # include <langinfo.h>
1235 # define gettxt gettxt_ds
1237 # include <nl_types.h>
1241 EXTERN nl_catd catd;
1242 # if defined(HAVE_ICONV) && defined(HAVE_NL_LANGINFO)
1243 # define CGETS(b, c, d) iconv_catgets(catd, b, c, d)
1245 # define CGETS(b, c, d) xcatgets(catd, b, c, d)
1247 # define CSAVS(b, c, d) strsave(CGETS(b, c, d))
1249 # define CGETS(b, c, d) d
1250 # define CSAVS(b, c, d) d
1252 #else /* WINNT_NATIVE */
1253 # define CGETS(b, c, d) nt_cgets( b, c, d)
1254 # define CSAVS(b, c, d) strsave(CGETS(b, c, d))
1255 #endif /* WINNT_NATIVE */
1261 #include "sh.decls.h"
1263 * Since on some machines characters are unsigned, and the signed
1264 * keyword is not universally implemented, we treat all characters
1265 * as unsigned and sign extend them where we need.
1267 #define SIGN_EXTEND_CHAR(a) (((a) & 0x80) ? ((a) | ~0x7f) : (a))
1270 * explanation for use by the "--help" option
1272 #define HELP_STRING "\
1273 -b file batch mode, read and execute commands from `file' \n\
1274 -c command run `command' from next argument \n\
1275 -d load directory stack from `~/.cshdirs' \n\
1276 -Dname[=value] define environment variable `name' to `value' (DomainOS only) \n\
1277 -e exit on any error \n\
1278 -f start faster by ignoring the start-up file \n\
1279 -F use fork() instead of vfork() when spawning (ConvexOS only) \n\
1280 -i interactive, even when input is not from a terminal \n\
1281 -l act as a login shell, must be the only option specified \n\
1282 -m load the start-up file, whether or not owned by effective user \n\
1283 -n file no execute mode, just check syntax of the following `file' \n\
1284 -q accept SIGQUIT for running under a debugger \n\
1285 -s read commands from standard input \n\
1286 -t read one line from standard input \n\
1287 -v echo commands after history substitution \n\
1288 -V like -v but including commands read from the start-up file \n\
1289 -x echo commands immediately before execution \n\
1290 -X like -x but including commands read from the start-up file \n\
1291 --help print this message and exit \n\
1292 --version print the version shell variable and exit \n\
1293 \nSee the tcsh(1) manual page for detailed information.\n"