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/en/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);
568 setcopy(STRstatus, STR0, VAR_READWRITE);
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("%S\n", varval(STRversion));
896 if (argc > 1 && strcmp(argv[1], "--help") == 0) {
897 xprintf("%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).
1837 xexit(getn(varval(STRstatus)));
1841 * in the event of a HUP we want to save the history
1847 setcopy(STRlogout, STRhangup, VAR_READWRITE);
1848 #ifdef _PATH_DOTLOGOUT
1849 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1852 (void) srccat(varval(STRhome), STRsldtlogout);
1859 * We kill the last foreground process group. It then becomes
1860 * responsible to propagate the SIGHUP to its progeny.
1863 struct process *pp, *np;
1865 for (pp = proclist.p_next; pp; pp = pp->p_next) {
1868 * Find if this job is in the foreground. It could be that
1869 * the process leader has exited and the foreground flag
1870 * is cleared for it.
1874 * If a process is in the foreground we try to kill
1875 * it's process group. If we succeed, then the
1876 * whole job is gone. Otherwise we keep going...
1877 * But avoid sending HUP to the shell again.
1879 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1880 np->p_flags &= ~PHUP;
1881 if (killpg(np->p_jobid, SIGHUP) != -1) {
1882 /* In case the job was suspended... */
1884 (void) killpg(np->p_jobid, SIGCONT);
1889 while ((np = np->p_friends) != pp);
1892 #endif /* POSIXJOBS */
1897 static Char *jobargv[2] = {STRjobs, 0};
1900 * Catch an interrupt, e.g. during lexical input.
1901 * If we are an interactive shell, we reset the interrupt catch
1902 * immediately. In any case we drain the shell output,
1903 * and finally go through the normal error mechanism, which
1904 * gets a chance to make the shell go away.
1906 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1922 dojobs(jobargv, NULL);
1923 stderror(ERR_NAME | ERR_INTR);
1926 /* MH - handle interrupted completions specially */
1928 if (InsideCompletion)
1929 stderror(ERR_SILENT);
1931 /* JV - Make sure we shut off inputl */
1933 (void) Cookedmode();
1939 #ifdef HAVE_GETPWENT
1944 * If we have an active "onintr" then we search for the label. Note that if
1945 * one does "onintr -" then we shan't be interruptible so we needn't worry
1952 else if (intty && wantnl) {
1955 * If we are editing a multi-line input command, and move to
1956 * the beginning of the line, we don't want to trash it when
1964 /* xputchar('\n'); *//* Some like this, others don't */
1965 (void) putraw('\r');
1966 (void) putraw('\n');
1969 stderror(ERR_SILENT);
1973 * Process is the main driving routine for the shell.
1974 * It runs all command processing, except for those within { ... }
1975 * in expressions (which is run by a routine evalav in sh.exp.c which
1976 * is a stripped down process), and `...` evaluation which is run
1977 * also by a subset of this code in sh.glob.c in the routine backeval.
1979 * The code here is a little strange because part of it is interruptible
1980 * and hence freeing of structures appears to occur when none is necessary
1981 * if this is ignored.
1983 * Note that if catch is not set then we will unwind on any error.
1984 * If an end-of-file occurs, we return.
1990 /* PWP: This might get nuked by longjmp so don't make it a register var */
1992 volatile int didexitset = 0;
1995 omark = cleanup_push_mark();
1998 int hadhist, old_pintr_disabled;
2001 if (didexitset == 0) {
2007 justpr = enterhist; /* execute if not entering history */
2013 cleanup_pop_mark(omark);
2019 * Every error is eventually caught here or the shell dies. It is
2020 * at this point that we clean up any left-over open files, by
2021 * closing all but a fixed number of pre-defined files. Thus
2022 * routines don't have to worry about leaving files open due to
2023 * deeper errors... they will get closed here.
2036 if (intty && prompt && evalvec == 0) {
2040 * Watch for logins/logouts. Next is scheduled commands stored
2041 * previously using "sched." Then execute periodic commands.
2042 * Following that, the prompt precmd is run.
2046 #endif /* !HAVENOUTMP */
2051 * If we are at the end of the input buffer then we are going to
2052 * read fresh stuff. Otherwise, we are rereading input and don't
2053 * need or want to prompt.
2055 if (fseekp == feobp && aret == TCSH_F_SEEK)
2056 printprompt(0, NULL);
2066 * Interruptible during interactive reads
2069 pintr_push_enable(&old_pintr_disabled);
2071 hadhist = lex(¶ml);
2073 cleanup_until(&old_pintr_disabled);
2074 cleanup_push(¶ml, lex_cleanup);
2077 * Echo not only on VERBOSE, but also with history expansion. If there
2078 * is a lexical error then we forego history echo.
2079 * Do not echo if we're only entering history (source -h).
2081 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) ||
2082 (!enterhist && adrof(STRverbose)))
2084 int odidfds = didfds;
2092 (void) alarm(0); /* Autologout OFF */
2093 alrmcatch_disabled = 1;
2096 * Save input text on the history list if reading in old history, or it
2097 * is from the terminal at the top level and not in a loop.
2099 * PWP: entry of items in the history list while in a while loop is done
2102 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun))
2103 savehist(¶ml, enterhist > 1);
2105 if (Expand && seterr)
2109 * Print lexical error messages, except when sourcing history lists.
2111 if (!enterhist && seterr)
2115 * If had a history command :p modifier then this is as far as we
2122 * If had a tellwhat from twenex() then do
2125 (void) tellmewhat(¶ml, NULL);
2133 * If we are interactive, try to continue jobs that we have stopped
2136 continue_jobs(¶ml);
2137 #endif /* BSDJOBS */
2140 * Check to see if the user typed "rm * .o" or something
2145 * Parse the words of the input into a parse tree.
2147 t = syntax(paraml.next, ¶ml, 0);
2149 * We cannot cleanup push here, because cd /blah; echo foo
2150 * would rewind t on the chdir error, and free the rest of the command
2159 * Execute the parse tree From: Michael Schroeder
2160 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2162 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
2169 if (windowchg || (catch && intty && !whyles && !tellwhat)) {
2170 (void) check_window_size(0); /* for window systems */
2172 #endif /* SIG_WINDOW */
2173 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB);
2175 if (cleanup_reset())
2176 cleanup_until(¶ml);
2180 cleanup_pop_mark(omark);
2183 handle_pending_signals();
2188 dosource(Char **t, struct command *c)
2196 if (*t && eq(*t, STRmh)) {
2198 stderror(ERR_NAME | ERR_HFLAG);
2201 else if (*t && eq(*t, STRmm)) {
2203 stderror(ERR_NAME | ERR_MFLAG);
2207 f = globone(*t++, G_ERROR);
2208 file = strsave(short2str(f));
2209 cleanup_push(file, xfree);
2211 t = glob_all_or_error(t);
2212 cleanup_push(t, blk_cleanup);
2213 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet))
2214 stderror(ERR_SYSTEM, file, strerror(errno));
2215 cleanup_until(file);
2220 * If we are a login shell, then we don't want to tell
2221 * about any mail file unless its been modified
2222 * after the time we started.
2223 * This prevents us from telling the user things he already
2224 * knows, since the login program insists on saying
2230 * This version checks if the file is a directory, and if so,
2231 * tells you the number of files in it, otherwise do the old thang.
2232 * The magic "+1" in the time calculation is to compensate for
2233 * an AFS bug where directory mtimes are set to 1 second in
2248 if (v == NULL || v->vec == NULL)
2253 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
2256 if (chktim + intvl > t)
2259 char *filename = short2str(*vp);
2260 char *mboxdir = filename;
2262 if (stat(filename, &stb) < 0)
2264 #if defined(BSDTIMES) || defined(_SEQUENT_)
2265 new = stb.st_mtime > time0.tv_sec;
2267 new = stb.st_mtime > seconds0;
2269 if (S_ISDIR(stb.st_mode)) {
2275 tempfilename = xasprintf("%s/new", filename);
2277 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2279 * "filename/new" exists and is a directory; you are
2283 #if defined(BSDTIMES) || defined(_SEQUENT_)
2284 new = stb.st_mtime > time0.tv_sec;
2286 new = stb.st_mtime > seconds0;
2288 mboxdir = tempfilename;
2291 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) {
2292 xfree(tempfilename);
2296 mailbox = opendir(mboxdir);
2297 xfree(tempfilename);
2298 if (mailbox == NULL)
2302 if (!readdir(mailbox) || !readdir(mailbox)) {
2303 (void)closedir(mailbox);
2307 while (readdir(mailbox))
2310 (void)closedir(mailbox);
2315 xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2318 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2319 mailcount, filename);
2324 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime ||
2325 (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
2328 type = strsave(new ? CGETS(11, 6, "new ") : "");
2329 cleanup_push(type, xfree);
2331 xprintf(CGETS(11, 5, "You have %smail.\n"), type);
2333 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
2334 cleanup_until(type);
2341 * Extract a home directory from the password file
2342 * The argument points to a buffer where the name of the
2343 * user whose home directory is sought is currently.
2344 * We return home directory of the user, or NULL.
2347 gethdir(const Char *home)
2354 if (*home == '\0') {
2355 if ((h = varval(STRhome)) != STRNULL)
2364 if ((h = gettilde(home)) == NULL)
2371 * Move the initial descriptors to their eventual
2372 * resting places, closing all other units.
2380 #endif /* NLS_CATALOGS */
2381 #endif /* NLS_BUGS */
2384 didfds = 0; /* 0, 1, 2 aren't set up */
2385 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2386 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2387 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2388 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2389 #ifndef CLOSE_ON_EXEC
2390 didcch = 0; /* Havent closed for child */
2391 #endif /* CLOSE_ON_EXEC */
2393 isdiagatty = isatty(SHDIAG);
2397 isoutatty = isatty(SHOUT);
2403 #endif /* NLS_CATALOGS */
2404 #endif /* NLS_BUGS */
2416 if (loginsh && do_logout) {
2417 /* this is to send hangup signal to the develcon */
2418 /* we toggle DTR. clear dtr - sleep 1 - set dtr */
2419 /* ioctl will return ENOTTY for pty's but we ignore it */
2420 /* exitstat will run after disconnect */
2421 /* we sleep for 2 seconds to let things happen in */
2422 /* .logout and rechist() */
2425 (void) ioctl(FSHTTY, TIOCCDTR, NULL);
2427 (void) ioctl(FSHTTY, TIOCSDTR, NULL);
2428 #endif /* TIOCCDTR */
2433 struct process *pp, *np;
2434 pid_t mypid = getpid();
2435 /* Kill all processes marked for hup'ing */
2436 for (pp = proclist.p_next; pp; pp = pp->p_next) {
2439 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp &&
2440 np->p_parentid == mypid) {
2441 if (killpg(np->p_jobid, SIGHUP) != -1) {
2442 /* In case the job was suspended... */
2444 (void) killpg(np->p_jobid, SIGCONT);
2449 while ((np = np->p_friends) != pp);
2455 * We need to call catclose, because SVR4 leaves symlinks behind otherwise
2456 * in the catalog directories. We cannot close on a vforked() child,
2457 * because messages will stop working on the parent too.
2461 #endif /* NLS_CATALOGS */
2464 #endif /* WINNT_NATIVE */
2468 #ifndef _PATH_DEFPATH
2476 blkp = blk = xmalloc(sizeof(Char *) * 10);
2480 *blkp++ = Strsave(STRdot);
2484 #define DIRAPPEND(a) \
2485 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2489 DIRAPPEND(_PATH_LOCAL);
2493 DIRAPPEND(_PATH_USRUCB);
2497 DIRAPPEND(_PATH_USRBSD);
2501 DIRAPPEND(_PATH_BIN);
2505 DIRAPPEND(_PATH_USRBIN);
2512 *blkp++ = Strsave(STRdot);
2524 recdirs(NULL, adrof(STRsavedirs) != NULL);
2525 rechist(NULL, adrof(STRsavehist) != NULL);
2527 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */
2531 * Grab the tty repeatedly, and give up if we are not in the correct
2532 * tty process group.
2535 grabpgrp(int fd, pid_t desired)
2537 struct sigaction old;
2541 for (i = 0; i < 100; i++) {
2542 if ((pgrp = tcgetpgrp(fd)) == -1)
2544 if (pgrp == desired)
2546 (void)sigaction(SIGTTIN, NULL, &old);
2547 (void)signal(SIGTTIN, SIG_DFL);
2548 (void)kill(0, SIGTTIN);
2549 (void)sigaction(SIGTTIN, &old, NULL);