1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.h,v 3.165 2011/04/14 18:25:25 christos Exp $ */
3 * sh.h: Catch it all globals and includes file!
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49 #ifdef HAVE_INTTYPES_H
50 # include <inttypes.h>
53 #if !defined(HAVE_STDINT_H) && !defined(HAVE_INTTYPES_H) && !defined(WINNT_NATIVE)
54 typedef unsigned long intptr_t;
58 # define EXTERN extern
62 # define IZERO_STRUCT = {0}
63 # endif /* WINNT_NATIVE */
71 #endif /* IZERO_STRUCT */
75 # define INIT_ZERO_STRUCT
76 # define force_read xread
77 #endif /*!WINNT_NATIVE */
79 #if defined(KANJI) && defined(WIDE_STRINGS) && defined(HAVE_NL_LANGINFO) && defined(CODESET)
85 #if defined(_POSIX_SOURCE) && !defined(POSIX)
89 #if defined(POSIXJOBS) && !defined(BSDJOBS)
93 #define TMP_TEMPLATE ".XXXXXX"
101 typedef wchar_t Char;
103 typedef unsigned long uChar;
104 typedef wint_t eChar; /* Can contain any Char value or CHAR_ERR */
105 #define CHAR_ERR WEOF /* Pretty please, use bit 31... */
106 #define normal_mbtowc(PWC, S, N) rt_mbtowc(PWC, S, N)
107 #define reset_mbtowc() TCSH_IGNORE(mbtowc(NULL, NULL, 0))
110 typedef unsigned short uChar;
112 #define CHAR_ERR (-1)
113 #define normal_mbtowc(PWC, S, N) ((void)(N), *(PWC) = (unsigned char)*(S), 1)
114 #define reset_mbtowc() ((void)0)
116 # define SAVE(a) (Strsave(str2short(a)))
119 typedef unsigned char uChar;
121 #define CHAR_ERR (-1)
122 #define normal_mbtowc(PWC, S, N) ((void)(N), *(PWC) = (unsigned char)*(S), 1)
123 #define reset_mbtowc() ((void)0)
124 # define SAVE(a) (strsave(a))
127 #if !defined(__inline) && !defined(__GNUC__) && !defined(_MSC_VER)
130 /* Elide unused argument warnings */
131 #define USE(a) (void) (a)
132 #define TCSH_IGNORE(a) tcsh_ignore((intptr_t)a)
133 static __inline void tcsh_ignore(intptr_t a)
139 * Return true if the path is absolute
141 #if defined(WINNT_NATIVE)
142 # define ABSOLUTEP(p) ((p)[0] == '/' || \
143 (Isalpha((p)[0]) && (p)[1] == ':'))
144 #elif defined(__CYGWIN__)
145 # define ABSOLUTEP(p) ((p)[0] == '/' || \
146 (Isalpha((p)[0]) && (p)[1] == ':' && \
147 ((p)[2] == '\0' || (p)[2] == '/')))
148 #else /* !WINNT_NATIVE && !__CYGWIN__ */
149 # define ABSOLUTEP(p) (*(p) == '/')
150 #endif /* WINNT_NATIVE || __CYGWIN__ */
153 * Fundamental definitions which may vary from system to system.
155 * BUFSIZE The i/o buffering size; also limits word size
156 * MAILINTVL How often to mailcheck; more often is more expensive
161 # define BUFSIZE 4096 /* buffer size should be no less than this */
164 # define BUFSIZE 4096
167 #define FORKSLEEP 10 /* delay loop on non-interactive fork failure */
168 #define MAILINTVL 600 /* 10 minutes */
171 # define INBUFSIZE 2*BUFSIZE /* Num input characters on the command line */
172 #endif /* INBUFSIZE */
176 * What our builtin echo looks like
181 #define BOTH_ECHO (BSD_ECHO|SYSV_ECHO)
185 # define ECHO_STYLE SYSV_ECHO
186 # else /* SYSVREL == 0 */
187 # define ECHO_STYLE BSD_ECHO
188 # endif /* SYSVREL */
189 #endif /* ECHO_STYLE */
192 * The shell moves std in/out/diag and the old std input away from units
193 * 0, 1, and 2 so that it is easy to set up these standards for invoked
196 #define FSAFE 5 /* We keep the first 5 descriptors untouched */
197 #define FSHTTY 15 /* /dev/tty when manip pgrps */
198 #define FSHIN 16 /* Preferred desc for shell input */
199 #define FSHOUT 17 /* ... shell output */
200 #define FSHDIAG 18 /* ... shell diagnostics */
201 #define FOLDSTD 19 /* ... old std input */
204 #define xexit(n) done(n)
208 # define word word_t /* sys/types.h defines word.. bad move! */
211 #include <sys/types.h>
218 * Path separator in environment variables
221 # if defined(__EMX__) || defined(WINNT_NATIVE)
225 # endif /* __EMX__ || WINNT_NATIVE */
226 #endif /* !PATHSEP */
228 #if defined(__HP_CXD_SPP) && !defined(__hpux)
229 # include <sys/cnx_stat.h>
231 # define fstat fstat64
232 # define lstat lstat64
233 #endif /* __HP_CXD_SPP && !__hpux */
235 #ifdef HAVE_LONG_LONG
236 typedef long long tcsh_number_t;
238 typedef long tcsh_number_t;
241 * This macro compares the st_dev field of struct stat. On aix on ibmESA
242 * st_dev is a structure, so comparison does not work.
244 #ifndef DEV_DEV_COMPARE
245 # define DEV_DEV_COMPARE(x,y) ((x) == (y))
246 #endif /* DEV_DEV_COMPARE */
249 # include <sys/procstats.h>
250 #endif /* _SEQUENT_ */
251 #if (defined(POSIX) || SYSVREL > 0) && !defined(WINNT_NATIVE)
252 # include <sys/times.h>
253 #endif /* (POSIX || SYSVREL > 0) && !WINNT_NATIVE */
259 #if !defined(_MINIX) && !defined(_VMS_POSIX) && !defined(WINNT_NATIVE) && !defined(__MVS__)
260 # include <sys/param.h>
261 #endif /* !_MINIX && !_VMS_POSIX && !WINNT_NATIVE && !__MVS__ */
262 #include <sys/stat.h>
264 #if defined(BSDTIMES) || defined(BSDLIMIT)
265 # include <sys/time.h>
266 # if SYSVREL>3 && !defined(SCO) && !defined(sgi) && !defined(SNI) && !defined(sun) && !(defined(__alpha) && defined(__osf__)) && !defined(_SX) && !defined(__MVS__)
267 # include "/usr/ucbinclude/sys/resource.h"
270 # define sysrusage cvxrusage
271 # include <sys/sysinfo.h>
273 # define sysrusage rusage
274 # include <sys/resource.h>
276 # endif /* SYSVREL>3 */
277 #endif /* BSDTIMES */
288 # include <termios.h>
292 # if SYSVREL > 3 || defined(__linux__)
293 # undef TIOCGLTC /* we don't need those, since POSIX has them */
296 # define CSWTCH _POSIX_VDISABLE /* So job control works */
297 # endif /* SYSVREL > 3 */
299 #endif /* WINNT_NATIVE */
302 # include <sys/ttold.h>
303 #endif /* sonyrisc */
305 #if defined(POSIX) && !defined(WINNT_NATIVE)
309 * the gcc+protoize version of <stdlib.h>
310 * redefines malloc(), so we define the following
313 # if defined(SYSMALLOC) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__) || defined(sgi) || defined(_OSD_POSIX)
314 # define NO_FIX_MALLOC
317 # define _GNU_STDLIB_H
318 # define malloc __malloc
320 # define calloc __calloc
321 # define realloc __realloc
327 # endif /* glibc || sgi */
328 #endif /* POSIX && !WINNT_NATIVE */
331 #if SYSVREL > 0 || defined(_IBMR2) || defined(_MINIX) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__)
332 # if !defined(pyr) && !defined(stellar)
335 # define HZ CLOCKS_PER_SEC
337 # endif /* !pyr && !stellar */
338 #endif /* SYSVREL > 0 || _IBMR2 */
340 /* In the following ifdef the DECOSF1 has been commented so that later
341 * versions of DECOSF1 will get TIOCGWINSZ. This might break older versions...
343 #if !((defined(SUNOS4) || defined(_MINIX) /* || defined(DECOSF1) */) && defined(TERMIO))
344 # if !defined(_VMS_POSIX) && !defined(WINNT_NATIVE)
345 # include <sys/ioctl.h>
346 # if SYSVREL > 3 || defined(__linux__)
347 # undef TIOCGLTC /* we don't need those, since POSIX has them */
350 # define CSWTCH _POSIX_VDISABLE /* So job control works */
351 # endif /* SYSVREL > 3 */
355 #if (defined(__DGUX__) && defined(POSIX)) || defined(DGUX)
357 #define CSWTCH _POSIX_VDISABLE
360 #if (!defined(FIOCLEX) && defined(SUNOS4)) || ((SYSVREL == 4) && !defined(_SEQUENT_) && !defined(SCO) && !defined(_SX)) && !defined(__MVS__)
361 # include <sys/filio.h>
362 #endif /* (!FIOCLEX && SUNOS4) || (SYSVREL == 4 && !_SEQUENT_ && !SCO && !_SX ) */
364 #if !defined(_MINIX) && !defined(supermax) && !defined(WINNT_NATIVE) && !defined(IRIS4D)
365 # include <sys/file.h>
366 #endif /* !_MINIX && !supermax && !WINNT_NATIVE && !defined(IRIS4D) */
368 #if !defined(O_RDONLY) || !defined(O_NDELAY)
384 # include <sys/dir.h>
386 # define dirent direct
387 #endif /* HAVE_DIRENT_H */
388 #ifndef HAVE_STRUCT_DIRENT_D_INO
389 # define d_ino d_fileno
391 #if defined(hpux) || defined(sgi) || defined(OREO)
392 # include <stdio.h> /* So the fgetpwent() prototypes work */
393 #endif /* hpux || sgi || OREO */
397 #endif /* WINNT_NATIVE */
400 #endif /* HAVE_SHADOW_H */
403 #endif /* HAVE_AUTH_H */
404 #if defined(BSD) && !defined(POSIX)
405 # include <strings.h>
406 # define strchr(a, b) index(a, b)
407 # define strrchr(a, b) rindex(a, b)
413 * IRIX-5.0 has <sys/cdefs.h>, but most system include files do not
414 * include it yet, so we include it here
416 #if defined(sgi) && SYSVREL > 3
417 # include <sys/cdefs.h>
418 #endif /* sgi && SYSVREL > 3 */
422 # undef MAXHOSTNAMELEN /* Busted headers? */
425 # include <netinet/in.h>
426 # include <arpa/inet.h>
427 # include <sys/socket.h>
428 # if (defined(_SS_SIZE) || defined(_SS_MAXSIZE)) && defined(HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY)
429 # if !defined(__APPLE__) /* Damnit, where is getnameinfo() folks? */
431 # if !defined(__CYGWIN__)
433 # endif /* __CYGWIN__ */
435 # endif /* __APPLE__ */
437 # include <sys/uio.h> /* For struct iovec */
438 #endif /* REMOTEHOST */
441 /* exit normally, allowing purify to trace leaks */
446 * If your compiler complains, then you can either
447 * throw it away and get gcc or, use the following define
448 * and get rid of the typedef.
449 * [The 4.2/3BSD vax compiler does not like that]
450 * Both MULTIFLOW and PCC compilers exhbit this bug. -- sterling@netcom.com
452 # if (defined(vax) || defined(uts) || defined(MULTIFLOW) || defined(PCC)) && !defined(__GNUC__)
454 # else /* !((vax || uts || MULTIFLOW || PCC) && !__GNUC__) */
456 # endif /* (vax || uts || MULTIFLOW || PCC) && !__GNUC__ */
468 #include "sh.types.h"
470 #if !HAVE_DECL_GETPGRP
471 # ifndef GETPGRP_VOID
472 extern pid_t getpgrp (int);
474 extern pid_t getpgrp (void);
479 typedef ptr_t memalign_t;
482 char am_char, *am_char_p;
483 short am_short, *am_short_p;
484 int am_int, *am_int_p;
485 long am_long, *am_long_p;
486 float am_float, *am_float_p;
487 double am_double, *am_double_p;
490 # define malloc lint_malloc
491 # define free lint_free
492 # define realloc lint_realloc
493 # define calloc lint_calloc
497 # define xmalloc(i) smalloc(i)
498 # define xrealloc(p, i) srealloc(p, i)
499 # define xcalloc(n, s) scalloc(n, s)
502 # define xmalloc(i) malloc(i)
503 # define xrealloc(p, i) realloc(p, i)
504 # define xcalloc(n, s) calloc(n, s)
506 #endif /* SYSMALLOC */
512 #include "pathnames.h"
518 * Bill Joy, UC Berkeley
519 * October, 1978; May 1980
521 * Jim Kulp, IIASA, Laxenburg Austria
531 #endif /* REMOTEHOST */
533 #ifndef MAXHOSTNAMELEN
534 # ifdef HOST_NAME_MAX
535 # define MAXHOSTNAMELEN (HOST_NAME_MAX + 1)
536 # elif defined(SCO) && (SYSVREL > 3)
537 # include <sys/socket.h>
539 # define MAXHOSTNAMELEN 256
541 #endif /* MAXHOSTNAMELEN */
545 #define eq(a, b) (Strcmp(a, b) == 0)
547 /* globone() flags */
548 #define G_ERROR 0 /* default action: error if multiple words */
549 #define G_IGNORE 1 /* ignore the rest of the words */
550 #define G_APPEND 2 /* make a sentence by cat'ing the words */
555 EXTERN int chkstop IZERO; /* Warned of stopped jobs... allow exit */
557 #if (defined(FIOCLEX) && defined(FIONCLEX)) || defined(F_SETFD)
558 # define CLOSE_ON_EXEC
560 EXTERN int didcch IZERO; /* Have closed unused fd's for child */
561 #endif /* (FIOCLEX && FIONCLEX) || F_SETFD */
563 EXTERN int didfds IZERO; /* Have setup i/o fd's for child */
564 EXTERN int doneinp IZERO; /* EOF indicator after reset from readc */
565 EXTERN int exiterr IZERO; /* Exit if error or non-zero exit status */
566 EXTERN int child IZERO; /* Child shell ... errors cause exit */
567 EXTERN int haderr IZERO; /* Reset was because of an error */
568 EXTERN int intty IZERO; /* Input is a tty */
569 EXTERN int intact IZERO; /* We are interactive... therefore prompt */
570 EXTERN int justpr IZERO; /* Just print because of :p hist mod */
571 EXTERN int loginsh IZERO; /* We are a loginsh -> .login/.logout */
572 EXTERN int neednote IZERO; /* Need to pnotify() */
573 EXTERN int noexec IZERO; /* Don't execute, just syntax check */
574 EXTERN int pjobs IZERO; /* want to print jobs if interrupted */
575 EXTERN int setintr IZERO; /* Set interrupts on/off -> Wait intr... */
576 EXTERN int handle_intr IZERO;/* Are we currently handling an interrupt? */
577 EXTERN int havhash IZERO; /* path hashing is available */
578 EXTERN int editing IZERO; /* doing filename expansion and line editing */
579 EXTERN int noediting IZERO; /* initial $term defaulted to noedit */
580 EXTERN int bslash_quote IZERO;/* PWP: tcsh-style quoting? (in sh.c) */
581 EXTERN int anyerror IZERO; /* propagate errors from pipelines/backq */
582 EXTERN int compat_expr IZERO;/* csh-style expressions? */
583 EXTERN int isoutatty IZERO; /* is SHOUT a tty */
584 EXTERN int isdiagatty IZERO;/* is SHDIAG a tty */
585 EXTERN int is1atty IZERO; /* is file descriptor 1 a tty (didfds mode) */
586 EXTERN int is2atty IZERO; /* is file descriptor 2 a tty (didfds mode) */
587 EXTERN int arun IZERO; /* Currently running multi-line-aliases */
588 EXTERN int implicit_cd IZERO;/* implicit cd enabled?(1=enabled,2=verbose) */
589 EXTERN int inheredoc IZERO; /* Currently parsing a heredoc */
590 /* We received a window change event */
591 EXTERN volatile sig_atomic_t windowchg IZERO;
592 #if defined(KANJI) && defined(SHORT_STRINGS) && defined(DSPMBYTE)
593 EXTERN int dspmbyte_ls;
599 EXTERN Char *arginp IZERO; /* Argument input for sh -c and internal `xx` */
600 EXTERN int onelflg IZERO; /* 2 -> need line for -t, 1 -> exit on read */
601 extern Char *ffile; /* Name of shell file for $0 */
602 extern int dolzero; /* if $?0 should return true... */
604 extern char *seterr; /* Error message from scanner/parser */
606 extern int errno; /* Error from C library routines */
609 /* Temp name for << shell files in /tmp, for xfree() */
610 EXTERN Char *shtemp IZERO;
613 EXTERN struct timeval time0; /* Time at which the shell started */
614 EXTERN struct sysrusage ru0;
617 EXTERN timeval_t time0; /* time at which shell started */
618 EXTERN struct process_stats ru0;
619 # else /* _SEQUENT_ */
621 EXTERN time_t time0; /* time at which shell started */
623 EXTERN clock_t time0; /* time at which shell started */
624 EXTERN clock_t clk_tck;
626 EXTERN struct tms shtimes; /* shell and child times for process timing */
627 # endif /* _SEQUENT_ */
628 EXTERN time_t seconds0;
629 #endif /* BSDTIMES */
632 # define HZ 100 /* for division into seconds */
638 EXTERN Char *doldol; /* Character pid for $$ */
639 EXTERN pid_t backpid; /* pid of the last background job */
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...
647 EXTERN uid_t uid, euid; /* Invokers real and effective */
648 EXTERN gid_t gid, egid; /* User and group ids */
649 EXTERN pid_t opgrp, /* Initial pgrp and tty pgrp */
650 shpgrp, /* Pgrp of shell */
651 tpgrp; /* Terminal process group */
652 /* If tpgrp is -1, leave tty alone! */
654 EXTERN Char *Prompt; /* The actual printed prompt or NULL */
655 EXTERN Char *RPrompt; /* Right-hand side prompt or NULL */
658 * To be able to redirect i/o for builtins easily, the shell moves the i/o
659 * descriptors it uses away from 0,1,2.
660 * Ideally these should be in units which are closed across exec's
661 * (this saves work) but for version 6, this is not usually possible.
662 * The desired initial values for these descriptors are defined in
665 EXTERN int SHIN IZERO; /* Current shell input (script) */
666 EXTERN int SHOUT IZERO; /* Shell output */
667 EXTERN int SHDIAG IZERO; /* Diagnostic output... shell errs go here */
668 EXTERN int OLDSTD IZERO; /* Old standard input (def for cmds) */
671 #if (SYSVREL == 4 && defined(_UTS)) || defined(__linux__)
673 * From: fadden@uts.amdahl.com (Andy McFadden)
674 * we need sigsetjmp for UTS4, but not UTS2.1
682 * Errors in scanning and parsing set up an error message to be printed
683 * at the end and complete. Other errors always cause a reset.
684 * Because of source commands and .cshrc we need nested error catches.
688 typedef struct { sigjmp_buf j; } jmp_buf_t;
689 # define setexit() sigsetjmp(reslab.j, 1)
690 # define _reset() siglongjmp(reslab.j, 1)
692 typedef struct { jmp_buf j; } jmp_buf_t;
693 # define setexit() setjmp(reslab.j)
694 # define _reset() longjmp(reslab.j, 1)
697 #define getexit(a) (void) ((a) = reslab)
698 #define resexit(a) (void) (reslab = (a))
700 #define cpybin(a, b) (void) ((a) = (b))
702 extern jmp_buf_t reslab;
704 EXTERN Char *gointr; /* Label for an onintr transfer */
706 extern struct sigaction parintr; /* Parents interrupt catch */
707 extern struct sigaction parterm; /* Parents terminate catch */
710 * Lexical definitions.
712 * All lexical space is allocated dynamically.
713 * The eighth/sixteenth bit of characters is used to prevent recognition,
714 * and eventually stripped.
718 #ifdef WIDE_STRINGS /* Implies SHORT_STRINGS */
719 /* 31st char bit used for 'ing (not 32nd, we want all values nonnegative) */
720 # define QUOTE 0x40000000
721 # define TRIM 0x3FFFFFFF /* Mask to strip quote bit */
722 # define UNDER 0x08000000 /* Underline flag */
723 # define BOLD 0x04000000 /* Bold flag */
724 # define STANDOUT 0x02000000 /* Standout flag */
725 # define LITERAL 0x01000000 /* Literal character flag */
726 # define ATTRIBUTES 0x0F000000 /* The bits used for attributes */
727 # define INVALID_BYTE 0x00800000 /* Invalid character on input */
729 # define CHAR 0x30FFFFFF /* Mask to mask out the character */
731 # define CHAR 0x00FFFFFF /* Mask to mask out the character */
733 #elif defined (SHORT_STRINGS)
734 # define QUOTE ((Char) 0100000)/* 16nth char bit used for 'ing */
735 # define TRIM 0073777 /* Mask to strip quote/lit bit */
736 # define UNDER 0040000 /* Underline flag */
737 # define BOLD 0020000 /* Bold flag */
738 # define STANDOUT 0010000 /* Standout flag */
739 # define LITERAL 0004000 /* Literal character flag */
740 # define ATTRIBUTES 0074000 /* The bits used for attributes */
741 # define INVALID_BYTE 0
742 # define CHAR 0000377 /* Mask to mask out the character */
744 # define QUOTE ((Char) 0200) /* Eighth char bit used for 'ing */
745 # define TRIM 0177 /* Mask to strip quote bit */
746 # define UNDER 0000000 /* No extra bits to do both */
747 # define BOLD 0000000 /* Bold flag */
748 # define STANDOUT META /* Standout flag */
749 # define LITERAL 0000000 /* Literal character flag */
750 # define ATTRIBUTES 0200 /* The bits used for attributes */
751 # define INVALID_BYTE 0
752 # define CHAR 0000177 /* Mask to mask out the character */
754 #define CHAR_DBWIDTH (LITERAL|(LITERAL-1))
756 EXTERN int AsciiOnly; /* If set only 7 bits expected in characters */
759 * Each level of input has a buffered input structure.
760 * There are one or more blocks of buffered input for each level,
761 * exactly one if the input is seekable and tell is available.
762 * In other cases, the shell buffers enough blocks to keep all loops
765 * If (WIDE_STRINGS && cantell), fbobp is always a byte offset, but
766 * (fseekp - fbobp) and (feobp - fbobp) are character offsets (usable for
769 * If (!cantell), all offsets are character offsets; if (!WIDE_STRINGS), there
770 * is no difference between byte and character offsets.
773 off_t Bfseekp; /* Seek pointer, generally != lseek() value */
774 off_t Bfbobp; /* Seekp of beginning of buffers */
775 off_t Bfeobp; /* Seekp of end of buffers */
776 int Bfblocks; /* Number of buffer blocks */
777 Char **Bfbuf; /* The array of buffer blocks */
779 /* Number of bytes in each character if (cantell) */
780 unsigned char Bfclens[BUFSIZE + 1];
785 * This structure allows us to seek inside aliases
789 #define TCSH_I_SEEK 0 /* Invalid seek */
790 #define TCSH_A_SEEK 1 /* Alias seek */
791 #define TCSH_F_SEEK 2 /* File seek */
792 #define TCSH_E_SEEK 3 /* Eval seek */
794 off_t _f_seek; /* A byte offset if (cantell) */
797 #define f_seek fc._f_seek
798 #define c_seek fc._c_seek
802 extern int aret; /* Type of last char returned */
803 #define SEEKEQ(a, b) ((a)->type == (b)->type && \
804 (a)->f_seek == (b)->f_seek && \
805 (a)->a_seek == (b)->a_seek)
807 #define fseekp B.Bfseekp
808 #define fbobp B.Bfbobp
809 #define feobp B.Bfeobp
810 #define fblocks B.Bfblocks
812 #define fclens B.Bfclens
815 * The shell finds commands in loops by reseeking the input
816 * For whiles, in particular, it reseeks to the beginning of the
817 * line the while was on; hence the while placement restrictions.
819 EXTERN struct Ain lineloc;
821 EXTERN int cantell; /* Is current source tellable ? */
824 * Input lines are parsed into doubly linked circular
825 * lists of words of the following form.
829 struct wordent *prev;
830 struct wordent *next;
834 * During word building, both in the initial lexical phase and
835 * when expanding $ variable substitutions, expansion by `!' and `$'
836 * must be inhibited when reading ahead in routines which are themselves
837 * processing `!' and `$' expansion or after characters such as `\' or in
838 * quotations. The following flags are passed to the getC routines
839 * telling them which of these substitutions are appropriate for the
840 * next character to be returned.
844 #define DOALL DODOL|DOEXCL
847 * Labuf implements a general buffer for lookahead during lexical operations.
848 * Text which is to be placed in the input stream can be stuck here.
849 * We stick parsed ahead $ constructs during initial input,
850 * process id's from `$$', and modified variable values (from qualifiers
851 * during expansion in sh.dol.c) here.
853 extern struct Strbuf labuf;
854 EXTERN size_t lap; /* N/A if == labuf.len, index into labuf.s otherwise */
859 * Each command is parsed to a tree of command structures and
860 * flags are set bottom up during this process, to be propagated down
861 * as needed during the semantics/exeuction pass (sh.sem.c).
864 unsigned char t_dtyp; /* Type of node */
865 #define NODE_COMMAND 1 /* t_dcom <t_dlef >t_drit */
866 #define NODE_PAREN 2 /* ( t_dspr ) <t_dlef >t_drit */
867 #define NODE_PIPE 3 /* t_dlef | t_drit */
868 #define NODE_LIST 4 /* t_dlef ; t_drit */
869 #define NODE_OR 5 /* t_dlef || t_drit */
870 #define NODE_AND 6 /* t_dlef && t_drit */
871 unsigned char t_nice; /* Nice value */
873 unsigned char t_systype; /* System environment */
875 unsigned long t_dflg; /* Flags, e.g. F_AMPERSAND|... */
876 /* save these when re-doing */
878 #define F_SAVE (F_NICE|F_TIME|F_NOHUP|F_HUP)
880 #define F_SAVE (F_NICE|F_TIME|F_NOHUP||F_HUP|F_VER)
882 #define F_AMPERSAND (1<<0) /* executes in background */
883 #define F_APPEND (1<<1) /* output is redirected >> */
884 #define F_PIPEIN (1<<2) /* input is a pipe */
885 #define F_PIPEOUT (1<<3) /* output is a pipe */
886 #define F_NOFORK (1<<4) /* don't fork, last ()ized cmd */
887 #define F_NOINTERRUPT (1<<5) /* should be immune from intr's */
889 #define F_STDERR (1<<7) /* redirect unit 2 with unit 1 */
890 #define F_OVERWRITE (1<<8) /* output was ! */
891 #define F_READ (1<<9) /* input redirection is << */
892 #define F_REPEAT (1<<10) /* reexec aft if, repeat,... */
893 #define F_NICE (1<<11) /* t_nice is meaningful */
894 #define F_NOHUP (1<<12) /* nohup this command */
895 #define F_TIME (1<<13) /* time this command */
896 #define F_BACKQ (1<<14) /* command is in `` */
897 #define F_HUP (1<<15) /* hup this command */
899 #define F_VER (1<<16) /* execute command under SYSTYPE */
902 Char *T_dlef; /* Input redirect word */
903 struct command *T_dcar; /* Left part of list/pipe */
906 Char *T_drit; /* Output redirect word */
907 struct command *T_dcdr; /* Right part of list/pipe */
909 #define t_dlef L.T_dlef
910 #define t_dcar L.T_dcar
911 #define t_drit R.T_drit
912 #define t_dcdr R.T_dcdr
913 Char **t_dcom; /* Command/argument vector */
914 struct command *t_dspr; /* Pointer to ()'d subtree */
919 * The keywords for the parser
942 * These are declared here because they want to be
943 * initialized in sh.init.c (to allow them to be made readonly)
946 #if defined(hpux) && defined(__STDC__) && !defined(__GNUC__)
947 /* Avoid hpux ansi mode spurious warnings */
948 typedef void (*bfunc_t) ();
950 typedef void (*bfunc_t) (Char **, struct command *);
951 #endif /* hpux && __STDC__ && !__GNUC__ */
953 extern const struct biltins {
956 int minargs, maxargs;
960 extern struct biltins nt_bfunc[];
961 extern int nt_nbfunc;
962 #endif /* WINNT_NATIVE*/
972 * Structure defining the existing while/foreach loops at this
973 * source level. Loops are implemented by seeking back in the
974 * input. For foreach (fe), the word list is attached here.
976 EXTERN struct whyle {
977 struct Ain w_start; /* Point to restart loop */
978 struct Ain w_end; /* End of loop (0 if unknown) */
979 Char **w_fe, **w_fe0; /* Current/initial wordlist for fe */
980 Char *w_fename; /* Name for fe */
981 struct whyle *w_next; /* Next (more outer) loop */
987 * Aliases and variables are stored in AVL balanced binary trees.
989 EXTERN struct varent {
990 Char **vec; /* Array of words which is the value */
991 Char *v_name; /* Name of variable/alias */
992 int v_flags; /* Flags */
994 #define VAR_READONLY 1
995 #define VAR_READWRITE 2
999 struct varent *v_link[3]; /* The links, see below */
1000 int v_bal; /* Balance factor */
1001 } shvhed IZERO_STRUCT, aliases IZERO_STRUCT;
1003 #define v_left v_link[0]
1004 #define v_right v_link[1]
1005 #define v_parent v_link[2]
1007 #define adrof(v) adrof1(v, &shvhed)
1008 #define varval(v) value1(v, &shvhed)
1011 * The following are for interfacing redo substitution in
1012 * aliases to the lexical routines.
1014 EXTERN struct wordent *alhistp IZERO_STRUCT;/* Argument list (first) */
1015 EXTERN struct wordent *alhistt IZERO_STRUCT;/* Node after last in arg list */
1016 EXTERN Char **alvec IZERO_STRUCT,
1017 *alvecp IZERO_STRUCT;/* The (remnants of) alias vector */
1020 * Filename/command name expansion variables
1025 #endif /* __CYGWIN__ */
1029 # define MAXPATHLEN PATH_MAX
1031 # define MAXPATHLEN 2048
1033 #endif /* MAXPATHLEN */
1039 extern struct limits {
1041 const char *limname;
1043 const char *limscale;
1045 #endif /* !HAVENOLIMIT */
1050 * Each history list entry contains an embedded wordlist
1051 * from the scanner, a number for the event, and a reference count
1052 * to aid in discarding old entries.
1054 * Essentially "invisible" entries are put on the history list
1055 * when history substitution includes modifiers, and thrown away
1056 * at the next discarding since their event numbers are very negative.
1058 EXTERN struct Hist {
1059 struct wordent Hlex;
1060 int Hnum; /* eventno when inserted into history list */
1064 struct Hist *Hnext, *Hprev; /* doubly linked list */
1065 unsigned Hhash; /* hash value of command line */
1066 } Histlist IZERO_STRUCT;
1068 EXTERN struct wordent paraml; /* Current lexical word list */
1069 EXTERN int eventno; /* Next events number */
1070 EXTERN int lastev; /* Last event reference (default) */
1072 EXTERN Char HIST; /* history invocation character */
1073 EXTERN Char HISTSUB; /* auto-substitute character */
1074 EXTERN Char PRCH; /* Prompt symbol for regular users */
1075 EXTERN Char PRCHROOT; /* Prompt symbol for root */
1078 * For operating systems with single case filenames (OS/2)
1080 #ifdef CASE_INSENSITIVE
1081 # ifdef WIDE_STRINGS
1082 # define samecase(x) (towlower(x))
1084 # define samecase(x) (isupper((unsigned char)(x)) ? \
1085 tolower((unsigned char)(x)) : (x))
1088 # define samecase(x) (x)
1089 #endif /* CASE_INSENSITIVE */
1094 #ifndef SHORT_STRINGS
1095 #define Strchr(a, b) strchr(a, b)
1096 #define Strrchr(a, b) strrchr(a, b)
1097 #define Strcat(a, b) strcat(a, b)
1098 #define Strncat(a, b, c) strncat(a, b, c)
1099 #define Strcpy(a, b) strcpy(a, b)
1100 #define Strncpy(a, b, c) strncpy(a, b, c)
1101 #define Strlen(a) strlen(a)
1102 #define Strcmp(a, b) strcmp(a, b)
1103 #define Strncmp(a, b, c) strncmp(a, b, c)
1104 #define Strcasecmp(a, b) strcasecmp(a, b)
1106 #define Strspl(a, b) strspl(a, b)
1107 #define Strnsave(a, b) strnsave(a, b)
1108 #define Strsave(a) strsave(a)
1109 #define Strend(a) strend(a)
1110 #define Strstr(a, b) strstr(a, b)
1112 #define str2short(a) (a)
1113 #define blk2short(a) saveblk(a)
1114 #define short2blk(a) saveblk(a)
1115 #define short2str(a) caching_strip(a)
1117 #if defined(WIDE_STRINGS) && !defined(UTF16_STRINGS)
1118 #define Strchr(a, b) wcschr(a, b)
1119 #define Strrchr(a, b) wcsrchr(a, b)
1120 #define Strcat(a, b) wcscat(a, b)
1121 #define Strncat(a, b, c) wcsncat(a, b, c)
1122 #define Strcpy(a, b) wcscpy(a, b)
1123 #define Strncpy(a, b, c) wcsncpy(a, b, c)
1124 #define Strlen(a) wcslen(a)
1125 #define Strcmp(a, b) wcscmp(a, b)
1126 #define Strncmp(a, b, c) wcsncmp(a, b, c)
1128 #define Strchr(a, b) s_strchr(a, b)
1129 #define Strrchr(a, b) s_strrchr(a, b)
1130 #define Strcat(a, b) s_strcat(a, b)
1131 #define Strncat(a, b, c) s_strncat(a, b, c)
1132 #define Strcpy(a, b) s_strcpy(a, b)
1133 #define Strncpy(a, b, c) s_strncpy(a, b, c)
1134 #define Strlen(a) s_strlen(a)
1135 #define Strcmp(a, b) s_strcmp(a, b)
1136 #define Strncmp(a, b, c) s_strncmp(a, b, c)
1138 #define Strcasecmp(a, b) s_strcasecmp(a, b)
1140 #define Strspl(a, b) s_strspl(a, b)
1141 #define Strnsave(a, b) s_strnsave(a, b)
1142 #define Strsave(a) s_strsave(a)
1143 #define Strend(a) s_strend(a)
1144 #define Strstr(a, b) s_strstr(a, b)
1148 * setname is a macro to save space (see sh.err.c)
1150 EXTERN const char *bname;
1152 #define setname(a) (bname = (a))
1157 EXTERN Char *Vexpath;
1161 EXTERN Char **evalvec;
1164 extern struct mesg {
1165 const char *iname; /* name from /usr/include */
1166 const char *pname; /* print name */
1169 /* word_chars is set by default to WORD_CHARS but can be overridden by
1170 the worchars variable--if unset, reverts to WORD_CHARS */
1172 EXTERN Char *word_chars;
1174 #define WORD_CHARS "*?_-.[]~=" /* default chars besides alnums in words */
1176 EXTERN Char *STR_SHELLPATH;
1179 EXTERN Char *STR_BSHELL;
1181 EXTERN Char *STR_WORD_CHARS;
1182 EXTERN Char **STR_environ IZERO;
1184 extern int dont_free; /* Tell free that we are in danger if we free */
1186 extern Char *INVPTR;
1187 extern Char **INVPPTR;
1189 extern char *progname;
1191 extern int xlate_cr;
1192 extern int output_raw;
1194 extern time_t Htime;
1196 extern int insource;
1197 extern char linbuf[];
1201 extern int use_fork;
1203 extern int tellwhat;
1204 extern int NoNLSRebind;
1205 #if !HAVE_DECL_ENVIRON
1206 extern char **environ;
1211 #ifndef WINNT_NATIVE
1212 # ifdef NLS_CATALOGS
1213 # ifdef HAVE_FEATURES_H
1214 # include <features.h>
1216 # ifdef HAVE_NL_LANGINFO
1217 # include <langinfo.h>
1220 # define gettxt gettxt_ds
1222 # include <nl_types.h>
1226 EXTERN nl_catd catd;
1227 # if defined(HAVE_ICONV) && defined(HAVE_NL_LANGINFO)
1228 # define CGETS(b, c, d) iconv_catgets(catd, b, c, d)
1230 # define CGETS(b, c, d) xcatgets(catd, b, c, d)
1232 # define CSAVS(b, c, d) strsave(CGETS(b, c, d))
1234 # define CGETS(b, c, d) d
1235 # define CSAVS(b, c, d) d
1237 #else /* WINNT_NATIVE */
1238 # define CGETS(b, c, d) nt_cgets( b, c, d)
1239 # define CSAVS(b, c, d) strsave(CGETS(b, c, d))
1240 #endif /* WINNT_NATIVE */
1246 #include "sh.decls.h"
1248 * Since on some machines characters are unsigned, and the signed
1249 * keyword is not universally implemented, we treat all characters
1250 * as unsigned and sign extend them where we need.
1252 #define SIGN_EXTEND_CHAR(a) (((a) & 0x80) ? ((a) | ~0x7f) : (a))
1255 * explanation for use by the "--help" option
1257 #define HELP_STRING "\
1258 -b file batch mode, read and execute commands from `file' \n\
1259 -c command run `command' from next argument \n\
1260 -d load directory stack from `~/.cshdirs' \n\
1261 -Dname[=value] define environment variable `name' to `value' (DomainOS only) \n\
1262 -e exit on any error \n\
1263 -f start faster by ignoring the start-up file \n\
1264 -F use fork() instead of vfork() when spawning (ConvexOS only) \n\
1265 -i interactive, even when input is not from a terminal \n\
1266 -l act as a login shell, must be the only option specified \n\
1267 -m load the start-up file, whether or not owned by effective user \n\
1268 -n file no execute mode, just check syntax of the following `file' \n\
1269 -q accept SIGQUIT for running under a debugger \n\
1270 -s read commands from standard input \n\
1271 -t read one line from standard input \n\
1272 -v echo commands after history substitution \n\
1273 -V like -v but including commands read from the start-up file \n\
1274 -x echo commands immediately before execution \n\
1275 -X like -x but including commands read from the start-up file \n\
1276 --help print this message and exit \n\
1277 --version print the version shell variable and exit \n\
1278 \nSee the tcsh(1) manual page for detailed information.\n"