2 * sh.c: Main shell routines
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
32 #define EXTERN /* Intern */
37 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\
38 All rights reserved.\n";
45 extern int MapsAreInited
;
46 extern int NLSMapsAreInited
;
51 * Bill Joy, UC Berkeley, California, USA
52 * October 1978, May 1980
54 * Jim Kulp, IIASA, Laxenburg, Austria
57 * Filename recognition added:
58 * Ken Greer, Ind. Consultant, Palo Alto CA
61 * Karl Kleinpaste, Computer Consoles, Inc.
62 * Added precmd, periodic/tperiod, prompt changes,
63 * directory stack hack, and login watch.
64 * Sometime March 1983 - Feb 1984.
66 * Added scheduled commands, including the "sched" command,
67 * plus the call to sched_run near the precmd et al
69 * Upgraded scheduled events for running events while
70 * sitting idle at command input.
72 * Paul Placeway, Ohio State
73 * added stuff for running with twenex/inputl 9 Oct 1984.
75 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987
78 jmp_buf_t reslab IZERO_STRUCT
;
79 struct wordent paraml IZERO_STRUCT
;
81 static const char tcshstr
[] = "tcsh";
83 struct sigaction parintr
; /* Parents interrupt catch */
84 struct sigaction parterm
; /* Parents terminate catch */
91 int use_fork
= 0; /* use fork() instead of vfork()? */
94 * Magic pointer values. Used to specify other invalid conditions aside
98 Char
*INVPTR
= &INVCHAR
;
99 Char
**INVPPTR
= &INVPTR
;
102 static int mflag
= 0;
103 static int prompt
= 1;
111 static time_t chktim
; /* Time mail last checked */
116 * This preserves the input state of the shell. It is used by
117 * st_save and st_restore to manupulate shell state.
126 struct whyle
*whyles
;
143 static int srccat (Char
*, Char
*);
145 static int srcfile (const char *, int, int, Char
**);
147 int srcfile (const char *, int, int, Char
**);
148 #endif /*WINNT_NATIVE*/
149 static void srcunit (int, int, int, Char
**);
150 static void mailchk (void);
151 #ifndef _PATH_DEFPATH
152 static Char
**defaultpath (void);
154 static void record (void);
155 static void st_save (struct saved_state
*, int, int,
157 static void st_restore (void *);
159 int main (int, char **);
162 #define LOCALEDIR "/usr/share/locale"
167 add_localedir_to_nlspath(const char *path
)
169 static const char msgs_LOC
[] = "/%L/LC_MESSAGES/%N.cat";
170 static const char msgs_lang
[] = "/%l/LC_MESSAGES/%N.cat";
176 char trypath
[MAXPATHLEN
];
182 (void) xsnprintf(trypath
, sizeof(trypath
), "%s/C/LC_MESSAGES/tcsh.cat",
184 if (stat(trypath
, &st
) == -1)
187 if ((old
= getenv("NLSPATH")) != NULL
)
188 len
= strlen(old
) + 1; /* don't forget the colon. */
192 len
+= 2 * strlen(path
) +
193 sizeof(msgs_LOC
) + sizeof(msgs_lang
); /* includes the extra colon */
195 new = new_p
= xcalloc(len
, 1);
198 size_t pathlen
= strlen(path
);
201 (void) xsnprintf(new_p
, len
, "%s", old
);
202 new_p
+= strlen(new_p
);
205 /* Check if the paths we try to add are already present in NLSPATH.
206 If so, note it by setting the appropriate flag to 0. */
207 for (old_p
= old
; old_p
; old_p
= strchr(old_p
, ':'),
208 old_p
= old_p
? old_p
+ 1 : NULL
) {
209 if (strncmp(old_p
, path
, pathlen
) != 0)
211 if (strncmp(old_p
+ pathlen
, msgs_LOC
, sizeof(msgs_LOC
) - 1) == 0)
213 else if (strncmp(old_p
+ pathlen
, msgs_lang
,
214 sizeof(msgs_lang
) - 1) == 0)
219 /* Add the message catalog paths not already present to NLSPATH. */
220 if (add_LOC
|| add_lang
)
221 (void) xsnprintf(new_p
, len
, "%s%s%s%s%s%s",
223 add_LOC
? path
: "", add_LOC
? msgs_LOC
: "",
224 add_LOC
&& add_lang
? ":" : "",
225 add_lang
? path
: "", add_lang
? msgs_lang
: "");
227 tsetenv(STRNLSPATH
, str2short(new));
233 main(int argc
, char **argv
)
236 volatile int nexececho
= 0;
238 volatile int nverbose
= 0;
239 volatile int rdirs
= 0;
240 volatile int exitcode
= 0;
249 static const char *targinp
= NULL
;
251 struct sigaction oparintr
;
255 #endif /* WINNT_NATIVE */
257 (void)memset(&reslab
, 0, sizeof(reslab
));
258 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
259 (void) setlocale(LC_MESSAGES
, "");
260 #endif /* NLS_CATALOGS && LC_MESSAGES */
264 (void) setlocale(LC_CTYPE
, ""); /* for iscntrl */
265 # endif /* LC_CTYPE */
268 STR_environ
= blk2short(environ
);
269 environ
= short2blk(STR_environ
); /* So that we can free it */
272 add_localedir_to_nlspath(LOCALEDIR
);
279 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace",
280 O_WRONLY
|O_CREAT
|O_LARGEFILE
, 0666), 25), "w"));
282 #endif /* MALLOC_TRACE */
284 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX)
286 clk_tck
= (clock_t) sysconf(_SC_CLK_TCK
);
287 # else /* ! _SC_CLK_TCK */
290 # else /* !CLK_TCK */
292 # endif /* CLK_TCK */
293 # endif /* _SC_CLK_TCK */
294 #endif /* !BSDTIMES && POSIX */
296 settimes(); /* Immed. estab. timing base */
302 * Make sure we have 0, 1, 2 open
303 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
307 if ((f
= xopen(_PATH_DEVNULL
, O_RDONLY
|O_LARGEFILE
)) == -1 &&
308 (f
= xopen("/", O_RDONLY
|O_LARGEFILE
)) == -1)
314 osinit(); /* Os dependent initialization */
320 t
= strrchr(argv
[0], '/');
323 char *s
= strrchr(argv
[0], '\\');
327 #endif /* WINNT_NATIVE */
328 t
= t
? t
+ 1 : argv
[0];
330 progname
= strsave((t
&& *t
) ? t
: tcshstr
); /* never want a null */
331 tcsh
= strncmp(progname
, tcshstr
, sizeof(tcshstr
) - 1) == 0;
335 * Initialize non constant strings
338 STR_BSHELL
= SAVE(_PATH_BSHELL
);
341 STR_SHELLPATH
= SAVE(_PATH_TCSHELL
);
344 STR_SHELLPATH
= SAVE(_PATH_CSHELL
);
347 STR_WORD_CHARS
= SAVE(WORD_CHARS
);
348 STR_WORD_CHARS_VI
= SAVE(WORD_CHARS_VI
);
352 PRCH
= tcsh
? '>' : '%'; /* to replace %# in $prompt for normal users */
353 PRCHROOT
= '#'; /* likewise for root */
354 word_chars
= STR_WORD_CHARS
;
355 bslash_quote
= 0; /* PWP: do tcsh-style backslash quoting? */
356 anyerror
= 1; /* for compatibility */
357 setcopy(STRanyerror
, STRNULL
, VAR_READWRITE
);
359 /* Default history size to 100 */
360 setcopy(STRhistory
, str2short("100"), VAR_READWRITE
);
364 ffile
= SAVE(tempv
[0]);
366 if (eq(ffile
, STRaout
)) /* A.out's are quittable */
373 * We are a login shell if: 1. we were invoked as -<something> with
374 * optional arguments 2. or we were invoked only with the -l flag
376 loginsh
= (**tempv
== '-') || (argc
== 2 &&
377 tempv
[1][0] == '-' && tempv
[1][1] == 'l' &&
378 tempv
[1][2] == '\0');
380 /* No better way to find if we are a login shell */
382 loginsh
= (argc
== 1 && getppid() == 1);
383 **tempv
= '-'; /* Avoid giving VMS an acidic stomach */
385 #endif /* _VMS_POSIX */
387 if (loginsh
&& **tempv
!= '-') {
391 * Mangle the argv space
396 argv0
= strspl("-", *tempv
);
401 (void) time(&chktim
);
405 NoNLSRebind
= getenv("NOREBIND") != NULL
;
409 # endif /* SETLOCALEBUG */
410 (void) setlocale(LC_ALL
, "");
412 (void) setlocale(LC_COLLATE
, "");
416 # endif /* SETLOCALEBUG */
419 # endif /* STRCOLLBUG */
422 * On solaris ISO8859-1 contains no printable characters in the upper half
423 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte
424 * locales we are always AsciiOnly == 0.
426 if (MB_CUR_MAX
== 1) {
429 for (k
= 0200; k
<= 0377 && !isprint(CTL_ESC(k
)); k
++)
431 AsciiOnly
= k
> 0377;
435 AsciiOnly
= getenv("LANG") == NULL
&& getenv("LC_CTYPE") == NULL
;
437 if (MapsAreInited
&& !NLSMapsAreInited
)
442 * Initialize for periodic command intervals. Also, initialize the dummy
443 * tty list for login-watch.
445 (void) time(&t_period
);
448 #endif /* !HAVENOUTMP */
452 * From: Jim Pace <jdp@research.att.com>
453 * tcsh does not work properly on the alliants through an rlogin session.
454 * The shell generally hangs. Also, reference to the controlling terminal
455 * does not work ( ie: echo foo > /dev/tty ).
457 * A security feature was added to rlogind affecting FX/80's Concentrix
458 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
459 * This security change also affects the FX/2800 series.
460 * The security change to rlogind requires the process group of an rlogin
461 * session become disassociated with the tty in rlogind.
463 * The changes needed are:
464 * 1. set the process group
465 * 2. reenable the control terminal
467 if (loginsh
&& isatty(SHIN
)) {
468 ttyn
= ttyname(SHIN
);
470 SHIN
= xopen(ttyn
, O_RDWR
|O_LARGEFILE
);
472 (void) ioctl (SHIN
, TIOCSPGRP
, (ioctl_t
) &shpgrp
);
473 (void) setpgid(0, shpgrp
);
478 * Move the descriptors to safe places. The variable didfds is 0 while we
479 * have only FSH* to work with. When didfds is true, we have 0,1,2 and
480 * prefer to use these.
485 setv(STRcdtohome
, SAVE(""), VAR_READWRITE
);
488 * Get and set the tty now
490 if ((ttyn
= ttyname(SHIN
)) != NULL
) {
492 * Could use rindex to get rid of other possible path components, but
493 * hpux preserves the subdirectory /pty/ when storing the tty name in
494 * utmp, so we keep it too.
496 if (strncmp(ttyn
, "/dev/", 5) == 0)
497 setv(STRtty
, cp
= SAVE(ttyn
+ 5), VAR_READWRITE
);
499 setv(STRtty
, cp
= SAVE(ttyn
), VAR_READWRITE
);
502 setv(STRtty
, cp
= SAVE(""), VAR_READWRITE
);
505 * Initialize the shell variables. ARGV and PROMPT are initialized later.
506 * STATUS is also munged in several places. CHILD is munged when
511 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
512 * on shells running as root. Out of these, autologout should NOT be set
513 * for any psudo-terminals (this catches most window systems) and not for
514 * any terminal running X windows.
516 * At Ohio State, we have had problems with a user having his X session
517 * drop out from under him (on a Sun) because the shell in his master
518 * xterm timed out and exited.
520 * Really, this should be done with a program external to the shell, that
521 * watches for no activity (and NO running programs, such as dump) on a
522 * terminal for a long peroid of time, and then SIGHUPS the shell on that
525 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
526 * allways first check to see if loginsh or really root, then do things
529 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
530 * value of cp before using it! ("root can rsh too")
532 * PWP: keep the nested ifs; the order of the tests matters and a good
533 * (smart) C compiler might re-arange things wrong.
538 /* root always has a 15 minute autologout */
539 setcopy(STRautologout
, STRrootdefautologout
, VAR_READWRITE
);
542 /* users get autologout set to 0 */
543 setcopy(STRautologout
, STR0
, VAR_READWRITE
);
545 if (loginsh
|| (uid
== 0)) {
547 /* only for login shells or root and we must have a tty */
548 if (((cp2
= Strrchr(cp
, (Char
) '/')) != NULL
) &&
549 (Strncmp(cp
, STRptssl
, 3) != 0)) {
554 if (!(((Strncmp(cp2
, STRtty
, 3) == 0) && Isalpha(cp2
[3])) ||
555 Strstr(cp
, STRptssl
) != NULL
)) {
556 if (getenv("DISPLAY") == NULL
) {
557 /* NOT on X window shells */
558 setcopy(STRautologout
, STRdefautologout
, VAR_READWRITE
);
564 #endif /* AUTOLOGOUT */
566 sigset_interrupting(SIGALRM
, queue_alrmcatch
);
571 * get and set machine specific environment variables
577 * Publish the selected echo style
579 #if ECHO_STYLE != BSD_ECHO
581 # if ECHO_STYLE == NONE_ECHO
582 setcopy(STRecho_style
, STRnone
, VAR_READWRITE
);
583 # endif /* ECHO_STYLE == NONE_ECHO */
584 # if ECHO_STYLE == SYSV_ECHO
585 setcopy(STRecho_style
, STRsysv
, VAR_READWRITE
);
586 # endif /* ECHO_STYLE == SYSV_ECHO */
587 # if ECHO_STYLE == BOTH_ECHO
588 setcopy(STRecho_style
, STRboth
, VAR_READWRITE
);
589 # endif /* ECHO_STYLE == BOTH_ECHO */
591 #endif /* ECHO_STYLE != BSD_ECHO */
592 setcopy(STRecho_style
, STRbsd
, VAR_READWRITE
);
595 * increment the shell level.
600 /* On Android, $HOME either isn't set or set to /data, a R/O location.
601 Check for the environment variable EXTERNAL_STORAGE, which contains
602 the mount point of the external storage (SD card, mostly). If
603 EXTERNAL_STORAGE isn't set fall back to "/sdcard". Eventually
604 override $HOME so the environment is on the same page. */
605 if (((tcp
= getenv("HOME")) != NULL
&& strcmp (tcp
, "/data") != 0)
606 || (tcp
= getenv("EXTERNAL_STORAGE")) != NULL
) {
607 cp
= quote(SAVE(tcp
));
609 cp
= quote(SAVE("/sdcard"));
610 tsetenv(STRKHOME
, cp
);
612 if ((tcp
= getenv("HOME")) != NULL
)
613 cp
= quote(SAVE(tcp
));
619 fast
= 1; /* No home -> can't read scripts */
621 setv(STRhome
, cp
, VAR_READWRITE
);
623 dinit(cp
); /* dinit thinks that HOME == cwd in a login
626 * Grab other useful things from the environment. Should we grab
630 char *cln
, *cus
, *cgr
;
638 setv(STRoid
, Itoa(oid
, 0, 0), VAR_READWRITE
);
641 setv(STReuid
, Itoa(euid
, 0, 0), VAR_READWRITE
);
642 if ((pw
= xgetpwuid(euid
)) == NULL
)
643 setcopy(STReuser
, STRunknown
, VAR_READWRITE
);
645 setcopy(STReuser
, str2short(pw
->pw_name
), VAR_READWRITE
);
647 setv(STRuid
, Itoa(uid
, 0, 0), VAR_READWRITE
);
649 setv(STRgid
, Itoa(gid
, 0, 0), VAR_READWRITE
);
651 cln
= getenv("LOGNAME");
652 cus
= getenv("USER");
654 setv(STRuser
, quote(SAVE(cus
)), VAR_READWRITE
);
655 else if (cln
!= NULL
)
656 setv(STRuser
, quote(SAVE(cln
)), VAR_READWRITE
);
657 else if ((pw
= xgetpwuid(uid
)) == NULL
)
658 setcopy(STRuser
, STRunknown
, VAR_READWRITE
);
660 setcopy(STRuser
, str2short(pw
->pw_name
), VAR_READWRITE
);
662 tsetenv(STRLOGNAME
, varval(STRuser
));
664 tsetenv(STRKUSER
, varval(STRuser
));
666 cgr
= getenv("GROUP");
668 setv(STRgroup
, quote(SAVE(cgr
)), VAR_READWRITE
);
669 else if ((gr
= xgetgrgid(gid
)) == NULL
)
670 setcopy(STRgroup
, STRunknown
, VAR_READWRITE
);
672 setcopy(STRgroup
, str2short(gr
->gr_name
), VAR_READWRITE
);
674 tsetenv(STRKGROUP
, varval(STRgroup
));
678 * HOST may be wrong, since rexd transports the entire environment on sun
679 * 3.x Just set it again
682 char cbuff
[MAXHOSTNAMELEN
];
684 if (gethostname(cbuff
, sizeof(cbuff
)) >= 0) {
685 cbuff
[sizeof(cbuff
) - 1] = '\0'; /* just in case */
686 tsetenv(STRHOST
, str2short(cbuff
));
689 tsetenv(STRHOST
, STRunknown
);
695 * Try to determine the remote host we were logged in from.
698 #endif /* REMOTEHOST */
701 if ((tcp
= getenv("SYSTYPE")) == NULL
)
703 tsetenv(STRSYSTYPE
, quote(str2short(tcp
)));
707 * set editing on by default, unless running under Emacs as an inferior
709 * We try to do this intelligently. If $TERM is available, then it
710 * should determine if we should edit or not. $TERM is preserved
711 * across rlogin sessions, so we will not get confused if we rlogin
712 * under an emacs shell. Another advantage is that if we run an
713 * xterm under an emacs shell, then the $TERM will be set to
714 * xterm, so we are going to want to edit. Unfortunately emacs
715 * does not restore all the tty modes, so xterm is not very well
716 * set up. But this is not the shell's fault.
717 * Also don't edit if $TERM == wm, for when we're running under an ATK app.
718 * Finally, emacs compiled under terminfo, sets the terminal to dumb,
719 * so disable editing for that too.
721 * Unfortunately, in some cases the initial $TERM setting is "unknown",
722 * "dumb", or "network" which is then changed in the user's startup files.
723 * We fix this by setting noediting here if $TERM is unknown/dumb and
724 * if noediting is set, we switch on editing if $TERM is changed.
726 if ((tcp
= getenv("TERM")) != NULL
) {
727 setv(STRterm
, quote(SAVE(tcp
)), VAR_READWRITE
);
728 noediting
= strcmp(tcp
, "unknown") == 0 || strcmp(tcp
, "dumb") == 0 ||
729 strcmp(tcp
, "network") == 0;
730 editing
= strcmp(tcp
, "emacs") != 0 && strcmp(tcp
, "wm") != 0 &&
735 editing
= ((tcp
= getenv("EMACS")) == NULL
|| strcmp(tcp
, "t") != 0);
739 * The 'edit' variable is either set or unset. It doesn't
740 * need a value. Making it 'emacs' might be confusing.
747 * still more mutability: make the complete routine automatically add the
748 * suffix of file names...
753 * Compatibility with tcsh >= 6.12 by default
755 setNS(STRcsubstnonl
);
758 * Random default kill ring size
760 setcopy(STRkillring
, str2short("30"), VAR_READWRITE
);
763 * Re-initialize path if set in environment
765 if ((tcp
= getenv("PATH")) == NULL
) {
767 importpath(str2short(_PATH_DEFPATH
));
768 #else /* !_PATH_DEFPATH */
769 setq(STRpath
, defaultpath(), &shvhed
, VAR_READWRITE
);
770 #endif /* _PATH_DEFPATH */
772 * Export the path setting so that subsequent processes use the same path as we do.
774 exportpath(adrof(STRpath
)->vec
);
776 /* Importpath() allocates memory for the path, and the
777 * returned pointer from SAVE() was discarded, so
778 * this was a memory leak.. (sg)
780 * importpath(SAVE(tcp));
782 importpath(str2short(tcp
));
786 /* If the SHELL environment variable ends with "tcsh", set
787 * STRshell to the same path. This is to facilitate using
788 * the executable in environments where the compiled-in
789 * default isn't appropriate (sg).
794 if ((tcp
= getenv("SHELL")) != NULL
) {
795 sh_len
= strlen(tcp
);
796 if ((sh_len
>= 5 && strcmp(tcp
+ (sh_len
- 5), "/tcsh") == 0) ||
797 (!tcsh
&& sh_len
>= 4 && strcmp(tcp
+ (sh_len
- 4), "/csh") == 0))
798 setv(STRshell
, quote(SAVE(tcp
)), VAR_READWRITE
);
803 setcopy(STRshell
, STR_SHELLPATH
, VAR_READWRITE
);
806 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */
807 if ((tcp
= getenv("PROGRAM_ENVIRONMENT")) == NULL
)
809 tsetenv(STRPROGRAM_ENVIRONMENT
, quote(str2short(tcp
)));
810 #endif /* _OSD_POSIX */
813 if ((tcp
= getenv("LS_COLORS")) != NULL
)
814 parseLS_COLORS(str2short(tcp
));
815 if ((tcp
= getenv("LSCOLORS")) != NULL
)
816 parseLSCOLORS(str2short(tcp
));
817 #endif /* COLOR_LS_F */
820 doldol
= putn((tcsh_number_t
)mainpid
); /* For $$ */
825 if ((tmp
= getenv("TMP")) != NULL
) {
826 tmp
= xasprintf("%s/%s", tmp
, "sh");
833 shtemp
= Strspl(tmp2
, doldol
); /* For << */
836 #else /* !WINNT_NATIVE */
839 const char *tmpdir
= getenv ("TMPDIR");
842 shtemp
= Strspl(SAVE(tmpdir
), SAVE("/sh" TMP_TEMPLATE
)); /* For << */
844 #else /* !HAVE_MKSTEMP */
845 shtemp
= Strspl(STRtmpsh
, doldol
); /* For << */
846 #endif /* HAVE_MKSTEMP */
847 #endif /* WINNT_NATIVE */
850 * Record the interrupt states from the parent process. If the parent is
851 * non-interruptible our hand must be forced or we (and our children) won't
852 * be either. Our children inherit termination from our parent. We catch it
853 * only if we are the login shell.
855 sigaction(SIGINT
, NULL
, &parintr
);
856 sigaction(SIGTERM
, NULL
, &parterm
);
860 /* Enable process migration on ourselves and our progeny */
861 (void) signal(SIGMIGRATE
, SIG_DFL
);
865 * dspkanji/dspmbyte autosetting
867 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
868 #if defined(DSPMBYTE)
869 #if defined(NLS) && defined(LC_CTYPE)
870 if (((tcp
= setlocale(LC_CTYPE
, NULL
)) != NULL
|| (tcp
= getenv("LANG")) != NULL
) && !adrof(CHECK_MBYTEVAR
))
872 if ((tcp
= getenv("LANG")) != NULL
&& !adrof(CHECK_MBYTEVAR
))
875 autoset_dspmbyte(str2short(tcp
));
877 #if defined(WINNT_NATIVE)
878 else if (!adrof(CHECK_MBYTEVAR
))
879 nt_autoset_dspmbyte();
880 #endif /* WINNT_NATIVE */
882 #if defined(AUTOSET_KANJI)
883 # if defined(NLS) && defined(LC_CTYPE)
884 if (setlocale(LC_CTYPE
, NULL
) != NULL
|| getenv("LANG") != NULL
)
886 if (getenv("LANG") != NULL
)
889 #endif /* AUTOSET_KANJI */
890 fix_version(); /* publish the shell version */
892 if (argc
> 1 && strcmp(argv
[1], "--version") == 0) {
893 xprintf("%" TCSH_S
"\n", varval(STRversion
));
896 if (argc
> 1 && strcmp(argv
[1], "--help") == 0) {
897 xprintf("%" TCSH_S
"\n\n", varval(STRversion
));
898 xprintf("%s", CGETS(11, 8, HELP_STRING
));
902 * Process the arguments.
904 * Note that processing of -v/-x is actually delayed till after script
907 * We set the first character of our name to be '-' if we are a shell
908 * running interruptible commands. Many programs which examine ps'es
909 * use this to filter such shells out.
912 while (argc
> 0 && (tcp
= tempv
[0])[0] == '-' &&
913 *++tcp
!= '\0' && !batch
) {
917 case 0: /* - Interruptible, no prompt */
923 case 'b': /* -b Next arg is input file */
927 case 'c': /* -c Command input from arg */
933 it relies on a 7 bit environment (/bin/sh), so it
934 pass ascii arguments with the 8th bit set */
935 if (!strcmp(argv
[0], "sh"))
939 for (p
= tempv
[0]; *p
; ++p
)
947 case 'd': /* -d Load directory stack from file */
952 case 'D': /* -D Define environment variable */
957 if (dp
= Strchr(cp
, '=')) {
962 tsetenv(cp
, STRNULL
);
964 *tcp
= '\0'; /* done with this argument */
968 case 'e': /* -e Exit on any error */
972 case 'f': /* -f Fast start */
976 case 'i': /* -i Interactive, even if !intty */
981 case 'm': /* -m read .cshrc (from su) */
985 case 'n': /* -n Don't execute */
989 case 'q': /* -q (Undoc'd) ... die on quit */
993 case 's': /* -s Read from std input */
997 case 't': /* -t Read one line from input */
1003 case 'v': /* -v Echo hist expanded input */
1004 nverbose
= 1; /* ... later */
1007 case 'x': /* -x Echo just before execution */
1008 nexececho
= 1; /* ... later */
1011 case 'V': /* -V Echo hist expanded input */
1012 setNS(STRverbose
); /* NOW! */
1015 case 'X': /* -X Echo just before execution */
1016 setNS(STRecho
); /* NOW! */
1021 * This will cause children to be created using fork instead of
1032 * for O/S's that don't do the argument parsing right in
1033 * "#!/foo -f " scripts
1037 default: /* Unknown command option */
1039 stderror(ERR_TCSHUSAGE
, tcp
-1, progname
);
1046 if (quitit
) /* With all due haste, for debugging */
1047 (void) signal(SIGQUIT
, SIG_DFL
);
1050 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
1051 * arguments the first of them is the name of a shell file from which to
1054 if (nofile
== 0 && argc
> 0) {
1055 nofile
= xopen(tempv
[0], O_RDONLY
|O_LARGEFILE
);
1057 child
= 1; /* So this ... */
1058 /* ... doesn't return */
1059 stderror(ERR_SYSTEM
, tempv
[0], strerror(errno
));
1063 ffile
= SAVE(tempv
[0]);
1065 * Replace FSHIN. Handle /dev/std{in,out,err} specially
1066 * since once they are closed we cannot open them again.
1067 * In that case we use our own saved descriptors
1069 if ((SHIN
= dmove(nofile
, FSHIN
)) < 0)
1081 stderror(ERR_SYSTEM
, tempv
[0], strerror(errno
));
1084 (void) close_on_exec(SHIN
, 1);
1086 /* argc not used any more */ tempv
++;
1090 * Call to closem() used to be part of initdesc(). Now called below where
1091 * the script name argument has become stdin. Kernel may have used a file
1092 * descriptor to hold the name of the script (setuid case) and this name
1093 * mustn't be lost by closing the fd too soon.
1098 * Consider input a tty if it really is or we are interactive. but not for
1099 * editing (christos)
1101 if (!(intty
= isatty(SHIN
))) {
1108 if (intty
|| (intact
&& isatty(SHOUT
))) {
1109 if (!batch
&& (uid
!= euid
|| gid
!= egid
)) {
1111 child
= 1; /* So this ... */
1112 /* ... doesn't return */
1113 stderror(ERR_SYSTEM
, progname
, strerror(errno
));
1117 isoutatty
= isatty(SHOUT
);
1118 isdiagatty
= isatty(SHDIAG
);
1120 * Decide whether we should play with signals or not. If we are explicitly
1121 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
1122 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
1123 * Note that in only the login shell is it likely that parent may have set
1124 * signals to be ignored
1126 if (loginsh
|| intact
|| (intty
&& isatty(SHOUT
)))
1130 * Save the remaining arguments in argv.
1132 setq(STRargv
, blk2short(tempv
), &shvhed
, VAR_READWRITE
);
1135 * Set up the prompt.
1138 setcopy(STRprompt
, STRdefprompt
, VAR_READWRITE
);
1139 /* that's a meta-questionmark */
1140 setcopy(STRprompt2
, STRmquestion
, VAR_READWRITE
);
1141 setcopy(STRprompt3
, STRKCORRECT
, VAR_READWRITE
);
1145 * If we are an interactive shell, then start fiddling with the signals;
1146 * this is a tricky game.
1148 shpgrp
= mygetpgrp();
1151 struct sigaction osig
;
1154 if (!quitit
) /* Wary! */
1155 (void) signal(SIGQUIT
, SIG_IGN
);
1157 sigset_interrupting(SIGINT
, queue_pintr
);
1158 (void) signal(SIGTERM
, SIG_IGN
);
1161 * No reason I can see not to save history on all these events..
1162 * Most usual occurrence is in a window system, where we're not a login
1163 * shell, but might as well be... (sg)
1164 * But there might be races when lots of shells exit together...
1165 * [this is also incompatible].
1166 * We have to be mre careful here. If the parent wants to
1167 * ignore the signals then we leave them untouched...
1168 * We also only setup the handlers for shells that are trully
1171 sigaction(SIGHUP
, NULL
, &osig
);
1172 if (loginsh
|| osig
.sa_handler
!= SIG_IGN
)
1173 /* exit processing on HUP */
1174 sigset_interrupting(SIGHUP
, queue_phup
);
1176 sigaction(SIGXCPU
, NULL
, &osig
);
1177 if (loginsh
|| osig
.sa_handler
!= SIG_IGN
)
1178 /* exit processing on XCPU */
1179 sigset_interrupting(SIGXCPU
, queue_phup
);
1182 sigaction(SIGXFSZ
, NULL
, &osig
);
1183 if (loginsh
|| osig
.sa_handler
!= SIG_IGN
)
1184 /* exit processing on XFSZ */
1185 sigset_interrupting(SIGXFSZ
, queue_phup
);
1188 if (quitit
== 0 && targinp
== 0) {
1190 (void) signal(SIGTSTP
, SIG_IGN
);
1193 (void) signal(SIGTTIN
, SIG_IGN
);
1196 (void) signal(SIGTTOU
, SIG_IGN
);
1199 * Wait till in foreground, in case someone stupidly runs csh &
1200 * dont want to try to grab away the tty.
1202 if (isatty(FSHDIAG
))
1204 else if (isatty(FSHOUT
))
1206 else if (isatty(OLDSTD
))
1212 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1213 if (f
!= -1 && shpgrp
== 0) {
1215 (void) setpgid(0, shpgrp
);
1216 (void) tcsetpgrp(f
, shpgrp
);
1219 #ifdef BSDJOBS /* if we have tty job control */
1220 if (f
!= -1 && grabpgrp(f
, shpgrp
) != -1) {
1222 * Thanks to Matt Day for the POSIX references, and to
1223 * Paul Close for the SGI clarification.
1225 if (setdisc(f
) != -1) {
1229 if (tcsetpgrp(f
, shpgrp
) == -1) {
1231 * On hpux 7.03 this fails with EPERM. This happens on
1232 * the 800 when opgrp != shpgrp at this point. (we were
1233 * forked from a non job control shell)
1234 * POSIX 7.2.4, says we failed because the process
1235 * group specified did not belong to a process
1236 * in the same session with the tty. So we set our
1237 * process group and try again.
1239 if (setpgid(0, shpgrp
) == -1) {
1240 xprintf("setpgid:");
1243 if (tcsetpgrp(f
, shpgrp
) == -1) {
1244 xprintf("tcsetpgrp:");
1249 * We check the process group now. If it is the same, then
1250 * we don't need to set it again. On hpux 7.0 on the 300's
1251 * if we set it again it fails with EPERM. This is the
1252 * correct behavior according to POSIX 4.3.3 if the process
1253 * was a session leader .
1255 else if (shpgrp
!= mygetpgrp()) {
1256 if (setpgid(0, shpgrp
) == -1) {
1257 xprintf("setpgid:");
1263 * But on irix 3.3 we need to set it again, even if it is
1264 * the same. We do that to tell the system that we
1265 * need BSD process group compatibility.
1268 (void) setpgid(0, shpgrp
);
1270 (void) close_on_exec(dcopy(f
, FSHTTY
), 1);
1277 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1280 CGETS(11, 2, "Thus no job control in this shell.\n"));
1282 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1283 * have access to tty, disable editing too
1289 #else /* BSDJOBS */ /* don't have job control, so frotz it */
1291 #endif /* BSDJOBS */
1294 if (setintr
== 0 && parintr
.sa_handler
== SIG_DFL
)
1298 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1299 * handler is installed with signal(2) or sigset(2). sigaction(2) must
1302 * David Dawes (dawes@physics.su.oz.au) Sept 1991
1304 sigset_interrupting(SIGCHLD
, queue_pchild
);
1306 if (intty
&& !targinp
)
1307 (void) ed_Setup(editing
);/* Get the tty state, and set defaults */
1308 /* Only alter the tty state if editing */
1311 * Set an exit here in case of an interrupt or error reading the shell
1316 (void)cleanup_push_mark(); /* There is no outer handler */
1317 if (setexit() != 0) /* PWP */
1322 haderr
= 0; /* In case second time through */
1323 if (!fast
&& reenter
== 0) {
1324 /* Will have varval(STRhome) here because set fast if don't */
1327 cleanup_push(&pintr_disabled
, disabled_cleanup
);
1328 setintr
= 0;/*FIXRESET:cleanup*/
1329 /* onintr in /etc/ files has no effect */
1330 parintr
.sa_handler
= SIG_IGN
;/*FIXRESET: cleanup*/
1332 #ifdef _PATH_DOTLOGIN
1334 (void) srcfile(_PATH_DOTLOGIN
, 0, 0, NULL
);
1338 #ifdef _PATH_DOTCSHRC
1339 (void) srcfile(_PATH_DOTCSHRC
, 0, 0, NULL
);
1341 if (!targinp
&& !onelflg
&& !havhash
)
1344 #ifdef _PATH_DOTLOGIN
1346 (void) srcfile(_PATH_DOTLOGIN
, 0, 0, NULL
);
1349 cleanup_until(&pintr_disabled
);
1355 (void) srccat(varval(STRhome
), STRsldotlogin
);
1357 /* upward compat. */
1358 if (!srccat(varval(STRhome
), STRsldottcshrc
))
1359 (void) srccat(varval(STRhome
), STRsldotcshrc
);
1361 if (!targinp
&& !onelflg
&& !havhash
)
1365 * Source history before .login so that it is available in .login
1370 (void) srccat(varval(STRhome
), STRsldotlogin
);
1372 if (loginsh
|| rdirs
)
1375 /* Reset interrupt flag */
1380 /* Initing AFTER .cshrc is the Right Way */
1381 if (intty
&& !targinp
) { /* PWP setup stuff */
1382 ed_Init(); /* init the new line editor */
1384 check_window_size(1); /* mung environment */
1385 #endif /* SIG_WINDOW */
1389 * Now are ready for the -v and -x flags
1398 /* If this -c command caused an error before, skip processing */
1399 if (reenter
&& arginp
) {
1404 arginp
= SAVE(targinp
);
1406 * we put the command into a variable
1409 setv(STRcommand
, quote(Strsave(arginp
)), VAR_READWRITE
);
1412 * * Give an error on -c arguments that end in * backslash to
1413 * ensure that you don't make * nonportable csh scripts.
1418 cp
= Strend(arginp
);
1420 while (cp
> arginp
&& *--cp
== '\\')
1422 if ((count
& 1) != 0) {
1429 * All the rest of the world is inside this call. The argument to process
1430 * indicates whether it should catch "error unwinds". Thus if we are a
1431 * interactive shell our call here will never return by being blown past on
1440 /* Take care of these (especially HUP) here instead of inside flush. */
1441 handle_pending_signals();
1444 xprintf("logout\n");
1450 goodbye(NULL
, NULL
);
1465 if (tpgrp
> 0 && opgrp
!= shpgrp
) {
1466 (void) setpgid(0, opgrp
);
1467 (void) tcsetpgrp(FSHTTY
, opgrp
);
1468 (void) resetdisc(FSHTTY
);
1470 #endif /* BSDJOBS */
1474 importpath(Char
*cp
)
1481 for (dp
= cp
; *dp
; dp
++)
1485 * i+2 where i is the number of colons in the path. There are i+1
1486 * directories in the path plus we need room for a zero terminator.
1488 pv
= xcalloc(i
+ 2, sizeof(Char
*));
1493 if ((c
= *dp
) == PATHSEP
|| c
== 0) {
1495 pv
[i
++] = Strsave(*cp
? cp
: STRdot
);
1504 else if (*dp
== '\\')
1506 #endif /* WINNT_NATIVE */
1510 cleanup_push(pv
, blk_cleanup
);
1511 setq(STRpath
, pv
, &shvhed
, VAR_READWRITE
);
1517 * Source to the file which is the catenation of the argument names.
1520 srccat(Char
*cp
, Char
*dp
)
1522 if (cp
[0] == '/' && cp
[1] == '\0')
1523 return srcfile(short2str(dp
), (mflag
? 0 : 1), 0, NULL
);
1531 if (ep
!= cp
&& ep
[-1] == '/' && dp
[0] == '/') /* silly win95 */
1533 #endif /* WINNT_NATIVE */
1535 ep
= Strspl(cp
, dp
);
1536 cleanup_push(ep
, xfree
);
1537 ptr
= short2str(ep
);
1539 rv
= srcfile(ptr
, (mflag
? 0 : 1), 0, NULL
);
1546 * Source to a file putting the file descriptor in a safe place (> 2).
1548 #ifndef WINNT_NATIVE
1552 #endif /*WINNT_NATIVE*/
1553 srcfile(const char *f
, int onlyown
, int flag
, Char
**av
)
1557 if ((unit
= xopen(f
, O_RDONLY
|O_LARGEFILE
)) == -1)
1559 cleanup_push(&unit
, open_cleanup
);
1560 unit
= dmove(unit
, -1);
1561 cleanup_ignore(&unit
);
1562 cleanup_until(&unit
);
1564 (void) close_on_exec(unit
, 1);
1565 srcunit(unit
, onlyown
, flag
, av
);
1571 * Save the shell state, and establish new argument vector, and new input
1575 st_save(struct saved_state
*st
, int unit
, int hflg
, Char
**al
, Char
**av
)
1577 st
->insource
= insource
;
1579 /* Want to preserve the meaning of "source file >output".
1580 * Save old descriptors, move new 0,1,2 to safe places and assign
1581 * them to SH* and let process() redo 0,1,2 from them.
1583 * The macro returns true if d1 and d2 are good and they point to
1584 * different things. If you don't avoid saving duplicate
1585 * descriptors, you really limit the depth of "source" recursion
1586 * you can do because of all the open file descriptors. -IAN!
1588 #define NEED_SAVE_FD(d1,d2) \
1589 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
1590 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) )
1592 st
->OLDSTD
= st
->SHOUT
= st
->SHDIAG
= -1;/* test later to restore these */
1595 if (NEED_SAVE_FD(0,OLDSTD
)) {
1596 st
->OLDSTD
= OLDSTD
;
1597 OLDSTD
= dmove(0, -1);
1598 (void)close_on_exec(OLDSTD
, 1);
1600 if (NEED_SAVE_FD(1,SHOUT
)) {
1602 SHOUT
= dmove(1, -1);
1603 (void)close_on_exec(SHOUT
, 1);
1605 if (NEED_SAVE_FD(2,SHDIAG
)) {
1606 st
->SHDIAG
= SHDIAG
;
1607 SHDIAG
= dmove(2, -1);
1608 (void)close_on_exec(SHDIAG
, 1);
1614 st
->whyles
= whyles
;
1615 st
->gointr
= gointr
;
1616 st
->arginp
= arginp
;
1618 st
->evalvec
= evalvec
;
1619 st
->alvecp
= alvecp
;
1621 st
->onelflg
= onelflg
;
1622 st
->enterhist
= enterhist
;
1623 st
->justpr
= justpr
;
1628 st
->cantell
= cantell
;
1632 * we can now pass arguments to source.
1633 * For compatibility we do that only if arguments were really
1634 * passed, otherwise we keep the old, global $argv like before.
1636 if (av
!= NULL
&& *av
!= NULL
) {
1638 if ((vp
= adrof(STRargv
)) != NULL
&& vp
->vec
!= NULL
)
1639 st
->argv
= saveblk(vp
->vec
);
1642 setq(STRargv
, saveblk(av
), &shvhed
, VAR_READWRITE
);
1648 SHIN
= unit
; /* Do this first */
1650 /* Establish new input arena */
1653 fseekp
= feobp
= fblocks
= 0;
1659 intty
= isatty(SHIN
);
1674 * Restore the shell to a saved state
1677 st_restore(void *xst
)
1679 struct saved_state
*st
;
1685 /* Reset input arena */
1688 Char
** nfbuf
= fbuf
;
1689 int nfblocks
= fblocks
;
1693 for (i
= 0; i
< nfblocks
; i
++)
1701 insource
= st
->insource
;
1703 if (st
->OLDSTD
!= -1)
1704 xclose(OLDSTD
), OLDSTD
= st
->OLDSTD
;
1705 if (st
->SHOUT
!= -1)
1706 xclose(SHOUT
), SHOUT
= st
->SHOUT
;
1707 if (st
->SHDIAG
!= -1)
1708 xclose(SHDIAG
), SHDIAG
= st
->SHDIAG
;
1709 arginp
= st
->arginp
;
1710 onelflg
= st
->onelflg
;
1712 evalvec
= st
->evalvec
;
1713 alvecp
= st
->alvecp
;
1716 whyles
= st
->whyles
;
1717 gointr
= st
->gointr
;
1718 if (st
->HIST
!= '\0')
1720 enterhist
= st
->enterhist
;
1721 cantell
= st
->cantell
;
1722 justpr
= st
->justpr
;
1724 if (st
->argv
!= NULL
)
1725 setq(STRargv
, st
->argv
, &shvhed
, VAR_READWRITE
);
1726 else if (st
->av
!= NULL
&& *st
->av
!= NULL
&& adrof(STRargv
) != NULL
)
1731 * Source to a unit. If onlyown it must be our file or our group or
1732 * we don't chance it. This occurs on ".cshrc"s and the like.
1735 srcunit(int unit
, int onlyown
, int hflg
, Char
**av
)
1737 struct saved_state st
;
1739 st
.SHIN
= -1; /* st_restore checks this */
1747 if (fstat(unit
, &stb
) < 0) {
1753 /* Does nothing before st_save() because st.SHIN == -1 */
1754 cleanup_push(&st
, st_restore
);
1757 cleanup_push(&pintr_disabled
, disabled_cleanup
);
1760 /* Save the current state and move us to a new state */
1761 st_save(&st
, unit
, hflg
, NULL
, av
);
1764 * Now if we are allowing commands to be interrupted, we let ourselves be
1768 cleanup_until(&pintr_disabled
);
1770 cleanup_push(&pintr_disabled
, disabled_cleanup
);
1773 process(0); /* 0 -> blow away on errors */
1775 /* Restore the old state */
1782 goodbye(Char
**v
, struct command
*c
)
1793 signal(SIGQUIT
, SIG_IGN
);
1794 sigaddset(&set
, SIGQUIT
);
1795 sigprocmask(SIG_UNBLOCK
, &set
, NULL
);
1796 signal(SIGINT
, SIG_IGN
);
1797 sigaddset(&set
, SIGINT
);
1798 signal(SIGTERM
, SIG_IGN
);
1799 sigaddset(&set
, SIGTERM
);
1800 signal(SIGHUP
, SIG_IGN
);
1801 sigaddset(&set
, SIGHUP
);
1802 sigprocmask(SIG_UNBLOCK
, &set
, NULL
);
1804 setintr
= 0; /* No interrupts after "logout" */
1805 /* Trap errors inside .logout */
1806 omark
= cleanup_push_mark();
1807 if (setexit() == 0) {
1808 if (!(adrof(STRlogout
)))
1809 setcopy(STRlogout
, STRnormal
, VAR_READWRITE
);
1810 #ifdef _PATH_DOTLOGOUT
1811 (void) srcfile(_PATH_DOTLOGOUT
, 0, 0, NULL
);
1814 (void) srccat(varval(STRhome
), STRsldtlogout
);
1819 cleanup_pop_mark(omark
);
1831 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1832 * directly because we poke child here. Otherwise we might continue
1833 * unwarrantedly (sic).
1841 * in the event of a HUP we want to save the history
1846 static int again
= 0;
1851 setcopy(STRlogout
, STRhangup
, VAR_READWRITE
);
1852 #ifdef _PATH_DOTLOGOUT
1853 (void) srcfile(_PATH_DOTLOGOUT
, 0, 0, NULL
);
1856 (void) srccat(varval(STRhome
), STRsldtlogout
);
1863 * We kill the last foreground process group. It then becomes
1864 * responsible to propagate the SIGHUP to its progeny.
1867 struct process
*pp
, *np
;
1869 for (pp
= proclist
.p_next
; pp
; pp
= pp
->p_next
) {
1872 * Find if this job is in the foreground. It could be that
1873 * the process leader has exited and the foreground flag
1874 * is cleared for it.
1878 * If a process is in the foreground we try to kill
1879 * it's process group. If we succeed, then the
1880 * whole job is gone. Otherwise we keep going...
1881 * But avoid sending HUP to the shell again.
1883 if (((np
->p_flags
& PFOREGND
) != 0) && np
->p_jobid
!= shpgrp
) {
1884 np
->p_flags
&= ~PHUP
;
1885 if (killpg(np
->p_jobid
, SIGHUP
) != -1) {
1886 /* In case the job was suspended... */
1888 (void) killpg(np
->p_jobid
, SIGCONT
);
1893 while ((np
= np
->p_friends
) != pp
);
1896 #endif /* POSIXJOBS */
1901 static Char
*jobargv
[2] = {STRjobs
, 0};
1904 * Catch an interrupt, e.g. during lexical input.
1905 * If we are an interactive shell, we reset the interrupt catch
1906 * immediately. In any case we drain the shell output,
1907 * and finally go through the normal error mechanism, which
1908 * gets a chance to make the shell go away.
1910 int just_signaled
; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1926 dojobs(jobargv
, NULL
);
1927 stderror(ERR_NAME
| ERR_INTR
);
1930 /* MH - handle interrupted completions specially */
1932 if (InsideCompletion
)
1933 stderror(ERR_SILENT
);
1935 /* JV - Make sure we shut off inputl */
1937 (void) Cookedmode();
1943 #ifdef HAVE_GETPWENT
1948 * If we have an active "onintr" then we search for the label. Note that if
1949 * one does "onintr -" then we shan't be interruptible so we needn't worry
1956 else if (intty
&& wantnl
) {
1959 * If we are editing a multi-line input command, and move to
1960 * the beginning of the line, we don't want to trash it when
1968 /* xputchar('\n'); *//* Some like this, others don't */
1969 (void) putraw('\r');
1970 (void) putraw('\n');
1973 stderror(ERR_SILENT
);
1977 * Process is the main driving routine for the shell.
1978 * It runs all command processing, except for those within { ... }
1979 * in expressions (which is run by a routine evalav in sh.exp.c which
1980 * is a stripped down process), and `...` evaluation which is run
1981 * also by a subset of this code in sh.glob.c in the routine backeval.
1983 * The code here is a little strange because part of it is interruptible
1984 * and hence freeing of structures appears to occur when none is necessary
1985 * if this is ignored.
1987 * Note that if catch is not set then we will unwind on any error.
1988 * If an end-of-file occurs, we return.
1994 /* PWP: This might get nuked by longjmp so don't make it a register var */
1996 volatile int didexitset
= 0;
1999 omark
= cleanup_push_mark();
2002 int hadhist
, old_pintr_disabled
;
2005 if (didexitset
== 0) {
2011 justpr
= enterhist
; /* execute if not entering history */
2017 cleanup_pop_mark(omark
);
2023 * Every error is eventually caught here or the shell dies. It is
2024 * at this point that we clean up any left-over open files, by
2025 * closing all but a fixed number of pre-defined files. Thus
2026 * routines don't have to worry about leaving files open due to
2027 * deeper errors... they will get closed here.
2040 if (intty
&& prompt
&& evalvec
== 0) {
2044 * Watch for logins/logouts. Next is scheduled commands stored
2045 * previously using "sched." Then execute periodic commands.
2046 * Following that, the prompt precmd is run.
2050 #endif /* !HAVENOUTMP */
2055 * If we are at the end of the input buffer then we are going to
2056 * read fresh stuff. Otherwise, we are rereading input and don't
2057 * need or want to prompt.
2059 if (fseekp
== feobp
&& aret
== TCSH_F_SEEK
)
2060 printprompt(0, NULL
);
2070 * Interruptible during interactive reads
2073 pintr_push_enable(&old_pintr_disabled
);
2075 hadhist
= lex(¶ml
);
2077 cleanup_until(&old_pintr_disabled
);
2078 cleanup_push(¶ml
, lex_cleanup
);
2081 * Echo not only on VERBOSE, but also with history expansion. If there
2082 * is a lexical error then we forego history echo.
2083 * Do not echo if we're only entering history (source -h).
2085 if ((hadhist
&& !seterr
&& intty
&& !tellwhat
&& !Expand
&& !whyles
) ||
2086 (!enterhist
&& adrof(STRverbose
)))
2088 int odidfds
= didfds
;
2096 (void) alarm(0); /* Autologout OFF */
2097 alrmcatch_disabled
= 1;
2100 * Save input text on the history list if reading in old history, or it
2101 * is from the terminal at the top level and not in a loop.
2103 * PWP: entry of items in the history list while in a while loop is done
2106 if (enterhist
|| (catch && intty
&& !whyles
&& !tellwhat
&& !arun
))
2107 savehist(¶ml
, enterhist
> 1);
2109 if (Expand
&& seterr
)
2113 * Print lexical error messages, except when sourcing history lists.
2115 if (!enterhist
&& seterr
)
2119 * If had a history command :p modifier then this is as far as we
2126 * If had a tellwhat from twenex() then do
2129 (void) tellmewhat(¶ml
, NULL
);
2137 * If we are interactive, try to continue jobs that we have stopped
2140 continue_jobs(¶ml
);
2141 #endif /* BSDJOBS */
2144 * Check to see if the user typed "rm * .o" or something
2149 * Parse the words of the input into a parse tree.
2151 t
= syntax(paraml
.next
, ¶ml
, 0);
2153 * We cannot cleanup push here, because cd /blah; echo foo
2154 * would rewind t on the chdir error, and free the rest of the command
2163 * Execute the parse tree From: Michael Schroeder
2164 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2166 execute(t
, (tpgrp
> 0 ? tpgrp
: -1), NULL
, NULL
, TRUE
);
2173 if (windowchg
|| (catch && intty
&& !whyles
&& !tellwhat
)) {
2174 (void) check_window_size(0); /* for window systems */
2176 #endif /* SIG_WINDOW */
2177 setcopy(STR_
, InputBuf
, VAR_READWRITE
| VAR_NOGLOB
);
2179 if (cleanup_reset())
2180 cleanup_until(¶ml
);
2184 cleanup_pop_mark(omark
);
2187 handle_pending_signals();
2192 dosource(Char
**t
, struct command
*c
)
2200 if (*t
&& eq(*t
, STRmh
)) {
2202 stderror(ERR_NAME
| ERR_HFLAG
);
2205 else if (*t
&& eq(*t
, STRmm
)) {
2207 stderror(ERR_NAME
| ERR_MFLAG
);
2211 f
= globone(*t
++, G_ERROR
);
2212 file
= strsave(short2str(f
));
2213 cleanup_push(file
, xfree
);
2215 t
= glob_all_or_error(t
);
2216 cleanup_push(t
, blk_cleanup
);
2217 if ((!srcfile(file
, 0, hflg
, t
)) && (!hflg
) && (!bequiet
))
2218 stderror(ERR_SYSTEM
, file
, strerror(errno
));
2219 cleanup_until(file
);
2224 * If we are a login shell, then we don't want to tell
2225 * about any mail file unless its been modified
2226 * after the time we started.
2227 * This prevents us from telling the user things he already
2228 * knows, since the login program insists on saying
2234 * This version checks if the file is a directory, and if so,
2235 * tells you the number of files in it, otherwise do the old thang.
2236 * The magic "+1" in the time calculation is to compensate for
2237 * an AFS bug where directory mtimes are set to 1 second in
2252 if (v
== NULL
|| v
->vec
== NULL
)
2257 intvl
= (cnt
&& number(*vp
)) ? (--cnt
, getn(*vp
++)) : MAILINTVL
;
2260 if (chktim
+ intvl
> t
)
2263 char *filename
= short2str(*vp
);
2264 char *mboxdir
= filename
;
2266 if (stat(filename
, &stb
) < 0)
2268 #if defined(BSDTIMES) || defined(_SEQUENT_)
2269 new = stb
.st_mtime
> time0
.tv_sec
;
2271 new = stb
.st_mtime
> seconds0
;
2273 if (S_ISDIR(stb
.st_mode
)) {
2279 tempfilename
= xasprintf("%s/new", filename
);
2281 if (stat(tempfilename
, &stc
) != -1 && S_ISDIR(stc
.st_mode
)) {
2283 * "filename/new" exists and is a directory; you are
2287 #if defined(BSDTIMES) || defined(_SEQUENT_)
2288 new = stb
.st_mtime
> time0
.tv_sec
;
2290 new = stb
.st_mtime
> seconds0
;
2292 mboxdir
= tempfilename
;
2295 if (stb
.st_mtime
<= chktim
+ 1 || (loginsh
&& !new)) {
2296 xfree(tempfilename
);
2300 mailbox
= opendir(mboxdir
);
2301 xfree(tempfilename
);
2302 if (mailbox
== NULL
)
2306 if (!readdir(mailbox
) || !readdir(mailbox
)) {
2307 (void)closedir(mailbox
);
2311 while (readdir(mailbox
))
2314 (void)closedir(mailbox
);
2319 xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2322 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2323 mailcount
, filename
);
2328 if (stb
.st_size
== 0 || stb
.st_atime
>= stb
.st_mtime
||
2329 (stb
.st_atime
<= chktim
&& stb
.st_mtime
<= chktim
) ||
2332 type
= strsave(new ? CGETS(11, 6, "new ") : "");
2333 cleanup_push(type
, xfree
);
2335 xprintf(CGETS(11, 5, "You have %smail.\n"), type
);
2337 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type
, filename
);
2338 cleanup_until(type
);
2345 * Extract a home directory from the password file
2346 * The argument points to a buffer where the name of the
2347 * user whose home directory is sought is currently.
2348 * We return home directory of the user, or NULL.
2351 gethdir(const Char
*home
)
2358 if (*home
== '\0') {
2359 if ((h
= varval(STRhome
)) != STRNULL
)
2368 if ((h
= gettilde(home
)) == NULL
)
2375 * Move the initial descriptors to their eventual
2376 * resting places, closing all other units.
2384 #endif /* NLS_CATALOGS */
2385 #endif /* NLS_BUGS */
2388 didfds
= 0; /* 0, 1, 2 aren't set up */
2389 (void) close_on_exec(SHIN
= dcopy(0, FSHIN
), 1);
2390 (void) close_on_exec(SHOUT
= dcopy(1, FSHOUT
), 1);
2391 (void) close_on_exec(SHDIAG
= dcopy(2, FSHDIAG
), 1);
2392 (void) close_on_exec(OLDSTD
= dcopy(SHIN
, FOLDSTD
), 1);
2393 #ifndef CLOSE_ON_EXEC
2394 didcch
= 0; /* Havent closed for child */
2395 #endif /* CLOSE_ON_EXEC */
2397 isdiagatty
= isatty(SHDIAG
);
2401 isoutatty
= isatty(SHOUT
);
2407 #endif /* NLS_CATALOGS */
2408 #endif /* NLS_BUGS */
2420 if (loginsh
&& do_logout
) {
2421 /* this is to send hangup signal to the develcon */
2422 /* we toggle DTR. clear dtr - sleep 1 - set dtr */
2423 /* ioctl will return ENOTTY for pty's but we ignore it */
2424 /* exitstat will run after disconnect */
2425 /* we sleep for 2 seconds to let things happen in */
2426 /* .logout and rechist() */
2429 (void) ioctl(FSHTTY
, TIOCCDTR
, NULL
);
2431 (void) ioctl(FSHTTY
, TIOCSDTR
, NULL
);
2432 #endif /* TIOCCDTR */
2437 struct process
*pp
, *np
;
2438 pid_t mypid
= getpid();
2439 /* Kill all processes marked for hup'ing */
2440 for (pp
= proclist
.p_next
; pp
; pp
= pp
->p_next
) {
2443 if ((np
->p_flags
& PHUP
) && np
->p_jobid
!= shpgrp
&&
2444 np
->p_parentid
== mypid
) {
2445 if (killpg(np
->p_jobid
, SIGHUP
) != -1) {
2446 /* In case the job was suspended... */
2448 (void) killpg(np
->p_jobid
, SIGCONT
);
2453 while ((np
= np
->p_friends
) != pp
);
2459 * We need to call catclose, because SVR4 leaves symlinks behind otherwise
2460 * in the catalog directories. We cannot close on a vforked() child,
2461 * because messages will stop working on the parent too.
2465 #endif /* NLS_CATALOGS */
2468 #endif /* WINNT_NATIVE */
2472 #ifndef _PATH_DEFPATH
2480 blkp
= blk
= xmalloc(sizeof(Char
*) * 10);
2484 *blkp
++ = Strsave(STRdot
);
2488 #define DIRAPPEND(a) \
2489 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2493 DIRAPPEND(_PATH_LOCAL
);
2497 DIRAPPEND(_PATH_USRUCB
);
2501 DIRAPPEND(_PATH_USRBSD
);
2505 DIRAPPEND(_PATH_BIN
);
2509 DIRAPPEND(_PATH_USRBIN
);
2516 *blkp
++ = Strsave(STRdot
);
2527 static int again
= 0;
2533 ophup_disabled
= phup_disabled
;
2536 recdirs(NULL
, adrof(STRsavedirs
) != NULL
);
2537 rechist(NULL
, adrof(STRsavehist
) != NULL
);
2539 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */
2540 phup_disabled
= ophup_disabled
;
2544 * Grab the tty repeatedly, and give up if we are not in the correct
2545 * tty process group.
2548 grabpgrp(int fd
, pid_t desired
)
2550 struct sigaction old
;
2554 for (i
= 0; i
< 100; i
++) {
2555 if ((pgrp
= tcgetpgrp(fd
)) == -1)
2557 if (pgrp
== desired
)
2559 (void)sigaction(SIGTTIN
, NULL
, &old
);
2560 (void)signal(SIGTTIN
, SIG_DFL
);
2561 (void)kill(0, SIGTTIN
);
2562 (void)sigaction(SIGTTIN
, &old
, NULL
);