1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.174 2011/11/29 18:38:54 christos Exp $ */
3 * sh.c: Main shell routines
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #define EXTERN /* Intern */
38 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\
39 All rights reserved.\n";
42 RCSID("$tcsh: sh.c,v 3.174 2011/11/29 18:38:54 christos Exp $")
48 extern int MapsAreInited;
49 extern int NLSMapsAreInited;
54 * Bill Joy, UC Berkeley, California, USA
55 * October 1978, May 1980
57 * Jim Kulp, IIASA, Laxenburg, Austria
60 * Filename recognition added:
61 * Ken Greer, Ind. Consultant, Palo Alto CA
64 * Karl Kleinpaste, Computer Consoles, Inc.
65 * Added precmd, periodic/tperiod, prompt changes,
66 * directory stack hack, and login watch.
67 * Sometime March 1983 - Feb 1984.
69 * Added scheduled commands, including the "sched" command,
70 * plus the call to sched_run near the precmd et al
72 * Upgraded scheduled events for running events while
73 * sitting idle at command input.
75 * Paul Placeway, Ohio State
76 * added stuff for running with twenex/inputl 9 Oct 1984.
78 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987
83 static const char tcshstr[] = "tcsh";
85 struct sigaction parintr; /* Parents interrupt catch */
86 struct sigaction parterm; /* Parents terminate catch */
93 int use_fork = 0; /* use fork() instead of vfork()? */
96 * Magic pointer values. Used to specify other invalid conditions aside
100 Char *INVPTR = &INVCHAR;
101 Char **INVPPTR = &INVPTR;
104 static int mflag = 0;
105 static int prompt = 1;
113 static time_t chktim; /* Time mail last checked */
118 * This preserves the input state of the shell. It is used by
119 * st_save and st_restore to manupulate shell state.
128 struct whyle *whyles;
145 static int srccat (Char *, Char *);
147 static int srcfile (const char *, int, int, Char **);
149 int srcfile (const char *, int, int, Char **);
150 #endif /*WINNT_NATIVE*/
151 static void srcunit (int, int, int, Char **);
152 static void mailchk (void);
153 #ifndef _PATH_DEFPATH
154 static Char **defaultpath (void);
156 static void record (void);
157 static void st_save (struct saved_state *, int, int,
159 static void st_restore (void *);
161 int main (int, char **);
164 #define LOCALEDIR "/usr/share/locale"
169 add_localedir_to_nlspath(const char *path)
171 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat";
172 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat";
178 char trypath[MAXPATHLEN];
184 (void) xsnprintf(trypath, sizeof(trypath), "%s/en/LC_MESSAGES/tcsh.cat",
186 if (stat(trypath, &st) == -1)
189 if ((old = getenv("NLSPATH")) != NULL)
190 len = strlen(old) + 1; /* don't forget the colon. */
194 len += 2 * strlen(path) +
195 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */
197 new = new_p = xcalloc(len, 1);
200 size_t pathlen = strlen(path);
203 (void) xsnprintf(new_p, len, "%s", old);
204 new_p += strlen(new_p);
207 /* Check if the paths we try to add are already present in NLSPATH.
208 If so, note it by setting the appropriate flag to 0. */
209 for (old_p = old; old_p; old_p = strchr(old_p, ':'),
210 old_p = old_p ? old_p + 1 : NULL) {
211 if (strncmp(old_p, path, pathlen) != 0)
213 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0)
215 else if (strncmp(old_p + pathlen, msgs_lang,
216 sizeof(msgs_lang) - 1) == 0)
221 /* Add the message catalog paths not already present to NLSPATH. */
222 if (add_LOC || add_lang)
223 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s",
225 add_LOC ? path : "", add_LOC ? msgs_LOC : "",
226 add_LOC && add_lang ? ":" : "",
227 add_lang ? path : "", add_lang ? msgs_lang : "");
229 tsetenv(STRNLSPATH, str2short(new));
235 main(int argc, char **argv)
238 volatile int nexececho = 0;
240 volatile int nverbose = 0;
241 volatile int rdirs = 0;
251 struct sigaction oparintr;
253 (void)memset(&reslab, 0, sizeof(reslab));
256 #endif /* WINNT_NATIVE */
257 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
258 (void) setlocale(LC_MESSAGES, "");
259 #endif /* NLS_CATALOGS && LC_MESSAGES */
263 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
264 # endif /* LC_CTYPE */
267 STR_environ = blk2short(environ);
268 environ = short2blk(STR_environ); /* So that we can free it */
271 add_localedir_to_nlspath(LOCALEDIR);
277 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace",
278 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w"));
280 #endif /* MALLOC_TRACE */
282 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX)
284 clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
285 # else /* ! _SC_CLK_TCK */
288 # else /* !CLK_TCK */
290 # endif /* CLK_TCK */
291 # endif /* _SC_CLK_TCK */
292 #endif /* !BSDTIMES && POSIX */
294 settimes(); /* Immed. estab. timing base */
300 * Make sure we have 0, 1, 2 open
301 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
305 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 &&
306 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1)
312 osinit(); /* Os dependent initialization */
318 t = strrchr(argv[0], '/');
321 char *s = strrchr(argv[0], '\\');
325 #endif /* WINNT_NATIVE */
326 t = t ? t + 1 : argv[0];
328 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */
329 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0;
333 * Initialize non constant strings
336 STR_BSHELL = SAVE(_PATH_BSHELL);
339 STR_SHELLPATH = SAVE(_PATH_TCSHELL);
342 STR_SHELLPATH = SAVE(_PATH_CSHELL);
345 STR_WORD_CHARS = SAVE(WORD_CHARS);
349 PRCH = tcsh ? '>' : '%'; /* to replace %# in $prompt for normal users */
350 PRCHROOT = '#'; /* likewise for root */
351 word_chars = STR_WORD_CHARS;
352 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
353 anyerror = 1; /* for compatibility */
354 setcopy(STRanyerror, STRNULL, VAR_READWRITE);
356 /* Default history size to 100 */
357 setcopy(STRhistory, str2short("100"), VAR_READWRITE);
360 ffile = SAVE(tempv[0]);
362 if (eq(ffile, STRaout)) /* A.out's are quittable */
369 * We are a login shell if: 1. we were invoked as -<something> with
370 * optional arguments 2. or we were invoked only with the -l flag
372 loginsh = (**tempv == '-') || (argc == 2 &&
373 tempv[1][0] == '-' && tempv[1][1] == 'l' &&
374 tempv[1][2] == '\0');
376 /* No better way to find if we are a login shell */
378 loginsh = (argc == 1 && getppid() == 1);
379 **tempv = '-'; /* Avoid giving VMS an acidic stomach */
381 #endif /* _VMS_POSIX */
383 if (loginsh && **tempv != '-') {
387 * Mangle the argv space
392 argv0 = strspl("-", *tempv);
397 (void) time(&chktim);
401 NoNLSRebind = getenv("NOREBIND") != NULL;
405 # endif /* SETLOCALEBUG */
406 (void) setlocale(LC_ALL, "");
408 (void) setlocale(LC_COLLATE, "");
412 # endif /* SETLOCALEBUG */
415 # endif /* STRCOLLBUG */
418 * On solaris ISO8859-1 contains no printable characters in the upper half
419 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte
420 * locales we are always AsciiOnly == 0.
422 if (MB_CUR_MAX == 1) {
425 for (k = 0200; k <= 0377 && !isprint(CTL_ESC(k)); k++)
427 AsciiOnly = k > 0377;
431 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
433 if (MapsAreInited && !NLSMapsAreInited)
438 * Initialize for periodic command intervals. Also, initialize the dummy
439 * tty list for login-watch.
441 (void) time(&t_period);
444 #endif /* !HAVENOUTMP */
448 * From: Jim Pace <jdp@research.att.com>
449 * tcsh does not work properly on the alliants through an rlogin session.
450 * The shell generally hangs. Also, reference to the controlling terminal
451 * does not work ( ie: echo foo > /dev/tty ).
453 * A security feature was added to rlogind affecting FX/80's Concentrix
454 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
455 * This security change also affects the FX/2800 series.
456 * The security change to rlogind requires the process group of an rlogin
457 * session become disassociated with the tty in rlogind.
459 * The changes needed are:
460 * 1. set the process group
461 * 2. reenable the control terminal
463 if (loginsh && isatty(SHIN)) {
464 ttyn = ttyname(SHIN);
466 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE);
468 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
469 (void) setpgid(0, shpgrp);
474 * Move the descriptors to safe places. The variable didfds is 0 while we
475 * have only FSH* to work with. When didfds is true, we have 0,1,2 and
476 * prefer to use these.
481 * Get and set the tty now
483 if ((ttyn = ttyname(SHIN)) != NULL) {
485 * Could use rindex to get rid of other possible path components, but
486 * hpux preserves the subdirectory /pty/ when storing the tty name in
487 * utmp, so we keep it too.
489 if (strncmp(ttyn, "/dev/", 5) == 0)
490 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
492 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
495 setv(STRtty, cp = SAVE(""), VAR_READWRITE);
497 * Initialize the shell variables. ARGV and PROMPT are initialized later.
498 * STATUS is also munged in several places. CHILD is munged when
503 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
504 * on shells running as root. Out of these, autologout should NOT be set
505 * for any psudo-terminals (this catches most window systems) and not for
506 * any terminal running X windows.
508 * At Ohio State, we have had problems with a user having his X session
509 * drop out from under him (on a Sun) because the shell in his master
510 * xterm timed out and exited.
512 * Really, this should be done with a program external to the shell, that
513 * watches for no activity (and NO running programs, such as dump) on a
514 * terminal for a long peroid of time, and then SIGHUPS the shell on that
517 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
518 * allways first check to see if loginsh or really root, then do things
521 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
522 * value of cp before using it! ("root can rsh too")
524 * PWP: keep the nested ifs; the order of the tests matters and a good
525 * (smart) C compiler might re-arange things wrong.
530 /* root always has a 15 minute autologout */
531 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE);
534 /* users get autologout set to 0 */
535 setcopy(STRautologout, STR0, VAR_READWRITE);
537 if (loginsh || (uid == 0)) {
539 /* only for login shells or root and we must have a tty */
540 if (((cp2 = Strrchr(cp, (Char) '/')) != NULL) &&
541 (Strncmp(cp, STRptssl, 3) != 0)) {
546 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) ||
547 Strstr(cp, STRptssl) != NULL)) {
548 if (getenv("DISPLAY") == NULL) {
549 /* NOT on X window shells */
550 setcopy(STRautologout, STRdefautologout, VAR_READWRITE);
556 #endif /* AUTOLOGOUT */
558 sigset_interrupting(SIGALRM, queue_alrmcatch);
560 setcopy(STRstatus, STR0, VAR_READWRITE);
563 * get and set machine specific environment variables
569 * Publish the selected echo style
571 #if ECHO_STYLE != BSD_ECHO
573 # if ECHO_STYLE == NONE_ECHO
574 setcopy(STRecho_style, STRnone, VAR_READWRITE);
575 # endif /* ECHO_STYLE == NONE_ECHO */
576 # if ECHO_STYLE == SYSV_ECHO
577 setcopy(STRecho_style, STRsysv, VAR_READWRITE);
578 # endif /* ECHO_STYLE == SYSV_ECHO */
579 # if ECHO_STYLE == BOTH_ECHO
580 setcopy(STRecho_style, STRboth, VAR_READWRITE);
581 # endif /* ECHO_STYLE == BOTH_ECHO */
583 #endif /* ECHO_STYLE != BSD_ECHO */
584 setcopy(STRecho_style, STRbsd, VAR_READWRITE);
587 * increment the shell level.
591 if ((tcp = getenv("HOME")) != NULL)
592 cp = quote(SAVE(tcp));
595 /* On Android, $HOME usually isn't set, so we can't load user RC files.
596 Check for the environment variable EXTERNAL_STORAGE, which contains
597 the mount point of the external storage (SD card, mostly). If
598 EXTERNAL_STORAGE isn't set fall back to "/sdcard". */
599 if ((tcp = getenv("EXTERNAL_STORAGE")) != NULL)
600 cp = quote(SAVE(tcp));
602 cp = quote(SAVE("/sdcard"));
608 fast = 1; /* No home -> can't read scripts */
610 setv(STRhome, cp, VAR_READWRITE);
612 dinit(cp); /* dinit thinks that HOME == cwd in a login
615 * Grab other useful things from the environment. Should we grab
619 char *cln, *cus, *cgr;
627 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE);
630 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE);
631 if ((pw = xgetpwuid(euid)) == NULL)
632 setcopy(STReuser, STRunknown, VAR_READWRITE);
634 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE);
636 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE);
638 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE);
640 cln = getenv("LOGNAME");
641 cus = getenv("USER");
643 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE);
644 else if (cln != NULL)
645 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE);
646 else if ((pw = xgetpwuid(uid)) == NULL)
647 setcopy(STRuser, STRunknown, VAR_READWRITE);
649 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE);
651 tsetenv(STRLOGNAME, varval(STRuser));
653 tsetenv(STRKUSER, varval(STRuser));
655 cgr = getenv("GROUP");
657 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
658 else if ((gr = xgetgrgid(gid)) == NULL)
659 setcopy(STRgroup, STRunknown, VAR_READWRITE);
661 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE);
663 tsetenv(STRKGROUP, varval(STRgroup));
667 * HOST may be wrong, since rexd transports the entire environment on sun
668 * 3.x Just set it again
671 char cbuff[MAXHOSTNAMELEN];
673 if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
674 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */
675 tsetenv(STRHOST, str2short(cbuff));
678 tsetenv(STRHOST, STRunknown);
684 * Try to determine the remote host we were logged in from.
687 #endif /* REMOTEHOST */
690 if ((tcp = getenv("SYSTYPE")) == NULL)
692 tsetenv(STRSYSTYPE, quote(str2short(tcp)));
696 * set editing on by default, unless running under Emacs as an inferior
698 * We try to do this intelligently. If $TERM is available, then it
699 * should determine if we should edit or not. $TERM is preserved
700 * across rlogin sessions, so we will not get confused if we rlogin
701 * under an emacs shell. Another advantage is that if we run an
702 * xterm under an emacs shell, then the $TERM will be set to
703 * xterm, so we are going to want to edit. Unfortunately emacs
704 * does not restore all the tty modes, so xterm is not very well
705 * set up. But this is not the shell's fault.
706 * Also don't edit if $TERM == wm, for when we're running under an ATK app.
707 * Finally, emacs compiled under terminfo, sets the terminal to dumb,
708 * so disable editing for that too.
710 * Unfortunately, in some cases the initial $TERM setting is "unknown",
711 * "dumb", or "network" which is then changed in the user's startup files.
712 * We fix this by setting noediting here if $TERM is unknown/dumb and
713 * if noediting is set, we switch on editing if $TERM is changed.
715 if ((tcp = getenv("TERM")) != NULL) {
716 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
717 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 ||
718 strcmp(tcp, "network") == 0;
719 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
724 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0);
728 * The 'edit' variable is either set or unset. It doesn't
729 * need a value. Making it 'emacs' might be confusing.
736 * still more mutability: make the complete routine automatically add the
737 * suffix of file names...
742 * Compatibility with tcsh >= 6.12 by default
744 setNS(STRcsubstnonl);
747 * Random default kill ring size
749 setcopy(STRkillring, str2short("30"), VAR_READWRITE);
752 * Re-initialize path if set in environment
754 if ((tcp = getenv("PATH")) == NULL) {
756 importpath(str2short(_PATH_DEFPATH));
757 #else /* !_PATH_DEFPATH */
758 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
759 #endif /* _PATH_DEFPATH */
761 * Export the path setting so that subsequent processes use the same path as we do.
763 exportpath(adrof(STRpath)->vec);
765 /* Importpath() allocates memory for the path, and the
766 * returned pointer from SAVE() was discarded, so
767 * this was a memory leak.. (sg)
769 * importpath(SAVE(tcp));
771 importpath(str2short(tcp));
775 /* If the SHELL environment variable ends with "tcsh", set
776 * STRshell to the same path. This is to facilitate using
777 * the executable in environments where the compiled-in
778 * default isn't appropriate (sg).
783 if ((tcp = getenv("SHELL")) != NULL) {
784 sh_len = strlen(tcp);
785 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) ||
786 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
787 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
792 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE);
795 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */
796 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL)
798 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp)));
799 #endif /* _OSD_POSIX */
802 if ((tcp = getenv("LS_COLORS")) != NULL)
803 parseLS_COLORS(str2short(tcp));
804 #endif /* COLOR_LS_F */
806 doldol = putn((tcsh_number_t)getpid()); /* For $$ */
811 if ((tmp = getenv("TMP")) != NULL) {
812 tmp = xasprintf("%s/%s", tmp, "sh");
819 shtemp = Strspl(tmp2, doldol); /* For << */
822 #else /* !WINNT_NATIVE */
825 char *tmpdir = getenv ("TMPDIR");
828 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */
830 #else /* !HAVE_MKSTEMP */
831 shtemp = Strspl(STRtmpsh, doldol); /* For << */
832 #endif /* HAVE_MKSTEMP */
833 #endif /* WINNT_NATIVE */
836 * Record the interrupt states from the parent process. If the parent is
837 * non-interruptible our hand must be forced or we (and our children) won't
838 * be either. Our children inherit termination from our parent. We catch it
839 * only if we are the login shell.
841 sigaction(SIGINT, NULL, &parintr);
842 sigaction(SIGTERM, NULL, &parterm);
846 /* Enable process migration on ourselves and our progeny */
847 (void) signal(SIGMIGRATE, SIG_DFL);
851 * dspkanji/dspmbyte autosetting
853 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
854 #if defined(DSPMBYTE)
855 #if defined(NLS) && defined(LC_CTYPE)
856 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR))
858 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR))
861 autoset_dspmbyte(str2short(tcp));
863 #if defined(WINNT_NATIVE)
864 else if (!adrof(CHECK_MBYTEVAR))
865 nt_autoset_dspmbyte();
866 #endif /* WINNT_NATIVE */
868 #if defined(AUTOSET_KANJI)
869 # if defined(NLS) && defined(LC_CTYPE)
870 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL)
872 if (getenv("LANG") != NULL)
875 #endif /* AUTOSET_KANJI */
876 fix_version(); /* publish the shell version */
878 if (argc > 1 && strcmp(argv[1], "--version") == 0) {
879 xprintf("%S\n", varval(STRversion));
882 if (argc > 1 && strcmp(argv[1], "--help") == 0) {
883 xprintf("%S\n\n", varval(STRversion));
884 xprintf("%s", CGETS(11, 8, HELP_STRING));
888 * Process the arguments.
890 * Note that processing of -v/-x is actually delayed till after script
893 * We set the first character of our name to be '-' if we are a shell
894 * running interruptible commands. Many programs which examine ps'es
895 * use this to filter such shells out.
898 while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
899 *++tcp != '\0' && !batch) {
903 case 0: /* - Interruptible, no prompt */
909 case 'b': /* -b Next arg is input file */
913 case 'c': /* -c Command input from arg */
919 it relies on a 7 bit environment (/bin/sh), so it
920 pass ascii arguments with the 8th bit set */
921 if (!strcmp(argv[0], "sh"))
925 for (p = tempv[0]; *p; ++p)
929 arginp = SAVE(tempv[0]);
932 * we put the command into a variable
935 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
938 * * Give an error on -c arguments that end in * backslash to
939 * ensure that you don't make * nonportable csh scripts.
946 while (cp > arginp && *--cp == '\\')
948 if ((count & 1) != 0) {
956 case 'd': /* -d Load directory stack from file */
961 case 'D': /* -D Define environment variable */
966 if (dp = Strchr(cp, '=')) {
971 tsetenv(cp, STRNULL);
973 *tcp = '\0'; /* done with this argument */
977 case 'e': /* -e Exit on any error */
981 case 'f': /* -f Fast start */
985 case 'i': /* -i Interactive, even if !intty */
990 case 'm': /* -m read .cshrc (from su) */
994 case 'n': /* -n Don't execute */
998 case 'q': /* -q (Undoc'd) ... die on quit */
1002 case 's': /* -s Read from std input */
1006 case 't': /* -t Read one line from input */
1012 case 'v': /* -v Echo hist expanded input */
1013 nverbose = 1; /* ... later */
1016 case 'x': /* -x Echo just before execution */
1017 nexececho = 1; /* ... later */
1020 case 'V': /* -V Echo hist expanded input */
1021 setNS(STRverbose); /* NOW! */
1024 case 'X': /* -X Echo just before execution */
1025 setNS(STRecho); /* NOW! */
1030 * This will cause children to be created using fork instead of
1041 * for O/S's that don't do the argument parsing right in
1042 * "#!/foo -f " scripts
1046 default: /* Unknown command option */
1048 stderror(ERR_TCSHUSAGE, tcp-1, progname);
1055 if (quitit) /* With all due haste, for debugging */
1056 (void) signal(SIGQUIT, SIG_DFL);
1059 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
1060 * arguments the first of them is the name of a shell file from which to
1063 if (nofile == 0 && argc > 0) {
1064 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE);
1066 child = 1; /* So this ... */
1067 /* ... doesn't return */
1068 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1072 ffile = SAVE(tempv[0]);
1074 * Replace FSHIN. Handle /dev/std{in,out,err} specially
1075 * since once they are closed we cannot open them again.
1076 * In that case we use our own saved descriptors
1078 if ((SHIN = dmove(nofile, FSHIN)) < 0)
1090 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1093 (void) close_on_exec(SHIN, 1);
1095 /* argc not used any more */ tempv++;
1099 * Call to closem() used to be part of initdesc(). Now called below where
1100 * the script name argument has become stdin. Kernel may have used a file
1101 * descriptor to hold the name of the script (setuid case) and this name
1102 * mustn't be lost by closing the fd too soon.
1107 * Consider input a tty if it really is or we are interactive. but not for
1108 * editing (christos)
1110 if (!(intty = isatty(SHIN))) {
1117 if (intty || (intact && isatty(SHOUT))) {
1118 if (!batch && (uid != euid || gid != egid)) {
1120 child = 1; /* So this ... */
1121 /* ... doesn't return */
1122 stderror(ERR_SYSTEM, progname, strerror(errno));
1126 isoutatty = isatty(SHOUT);
1127 isdiagatty = isatty(SHDIAG);
1129 * Decide whether we should play with signals or not. If we are explicitly
1130 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
1131 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
1132 * Note that in only the login shell is it likely that parent may have set
1133 * signals to be ignored
1135 if (loginsh || intact || (intty && isatty(SHOUT)))
1139 * Save the remaining arguments in argv.
1141 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
1144 * Set up the prompt.
1147 setcopy(STRprompt, STRdefprompt, VAR_READWRITE);
1148 /* that's a meta-questionmark */
1149 setcopy(STRprompt2, STRmquestion, VAR_READWRITE);
1150 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE);
1154 * If we are an interactive shell, then start fiddling with the signals;
1155 * this is a tricky game.
1157 shpgrp = mygetpgrp();
1160 struct sigaction osig;
1163 if (!quitit) /* Wary! */
1164 (void) signal(SIGQUIT, SIG_IGN);
1166 sigset_interrupting(SIGINT, queue_pintr);
1167 (void) signal(SIGTERM, SIG_IGN);
1170 * No reason I can see not to save history on all these events..
1171 * Most usual occurrence is in a window system, where we're not a login
1172 * shell, but might as well be... (sg)
1173 * But there might be races when lots of shells exit together...
1174 * [this is also incompatible].
1175 * We have to be mre careful here. If the parent wants to
1176 * ignore the signals then we leave them untouched...
1177 * We also only setup the handlers for shells that are trully
1180 sigaction(SIGHUP, NULL, &osig);
1181 if (loginsh || osig.sa_handler != SIG_IGN)
1182 /* exit processing on HUP */
1183 sigset_interrupting(SIGHUP, queue_phup);
1185 sigaction(SIGXCPU, NULL, &osig);
1186 if (loginsh || osig.sa_handler != SIG_IGN)
1187 /* exit processing on XCPU */
1188 sigset_interrupting(SIGXCPU, queue_phup);
1191 sigaction(SIGXFSZ, NULL, &osig);
1192 if (loginsh || osig.sa_handler != SIG_IGN)
1193 /* exit processing on XFSZ */
1194 sigset_interrupting(SIGXFSZ, queue_phup);
1197 if (quitit == 0 && arginp == 0) {
1199 (void) signal(SIGTSTP, SIG_IGN);
1202 (void) signal(SIGTTIN, SIG_IGN);
1205 (void) signal(SIGTTOU, SIG_IGN);
1208 * Wait till in foreground, in case someone stupidly runs csh &
1209 * dont want to try to grab away the tty.
1211 if (isatty(FSHDIAG))
1213 else if (isatty(FSHOUT))
1215 else if (isatty(OLDSTD))
1221 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1224 (void) setpgid(0, shpgrp);
1225 (void) tcsetpgrp(f, shpgrp);
1228 #ifdef BSDJOBS /* if we have tty job control */
1229 if (grabpgrp(f, shpgrp) != -1) {
1231 * Thanks to Matt Day for the POSIX references, and to
1232 * Paul Close for the SGI clarification.
1234 if (setdisc(f) != -1) {
1238 if (tcsetpgrp(f, shpgrp) == -1) {
1240 * On hpux 7.03 this fails with EPERM. This happens on
1241 * the 800 when opgrp != shpgrp at this point. (we were
1242 * forked from a non job control shell)
1243 * POSIX 7.2.4, says we failed because the process
1244 * group specified did not belong to a process
1245 * in the same session with the tty. So we set our
1246 * process group and try again.
1248 if (setpgid(0, shpgrp) == -1) {
1249 xprintf("setpgid:");
1252 if (tcsetpgrp(f, shpgrp) == -1) {
1253 xprintf("tcsetpgrp:");
1258 * We check the process group now. If it is the same, then
1259 * we don't need to set it again. On hpux 7.0 on the 300's
1260 * if we set it again it fails with EPERM. This is the
1261 * correct behavior according to POSIX 4.3.3 if the process
1262 * was a session leader .
1264 else if (shpgrp != mygetpgrp()) {
1265 if(setpgid(0, shpgrp) == -1) {
1266 xprintf("setpgid:");
1272 * But on irix 3.3 we need to set it again, even if it is
1273 * the same. We do that to tell the system that we
1274 * need BSD process group compatibility.
1277 (void) setpgid(0, shpgrp);
1279 (void) close_on_exec(dcopy(f, FSHTTY), 1);
1286 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1289 CGETS(11, 2, "Thus no job control in this shell.\n"));
1291 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1292 * have access to tty, disable editing too
1298 #else /* BSDJOBS */ /* don't have job control, so frotz it */
1300 #endif /* BSDJOBS */
1303 if (setintr == 0 && parintr.sa_handler == SIG_DFL)
1307 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1308 * handler is installed with signal(2) or sigset(2). sigaction(2) must
1311 * David Dawes (dawes@physics.su.oz.au) Sept 1991
1313 sigset_interrupting(SIGCHLD, queue_pchild);
1315 if (intty && !arginp)
1316 (void) ed_Setup(editing);/* Get the tty state, and set defaults */
1317 /* Only alter the tty state if editing */
1320 * Set an exit here in case of an interrupt or error reading the shell
1325 (void)cleanup_push_mark(); /* There is no outer handler */
1326 if (setexit() != 0) /* PWP */
1331 haderr = 0; /* In case second time through */
1332 if (!fast && reenter == 0) {
1333 /* Will have varval(STRhome) here because set fast if don't */
1336 cleanup_push(&pintr_disabled, disabled_cleanup);
1337 setintr = 0;/*FIXRESET:cleanup*/
1338 /* onintr in /etc/ files has no effect */
1339 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/
1341 #ifdef _PATH_DOTLOGIN
1343 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1347 #ifdef _PATH_DOTCSHRC
1348 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
1350 if (!arginp && !onelflg && !havhash)
1353 #ifdef _PATH_DOTLOGIN
1355 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1358 cleanup_until(&pintr_disabled);
1364 (void) srccat(varval(STRhome), STRsldotlogin);
1366 /* upward compat. */
1367 if (!srccat(varval(STRhome), STRsldottcshrc))
1368 (void) srccat(varval(STRhome), STRsldotcshrc);
1370 if (!arginp && !onelflg && !havhash)
1374 * Source history before .login so that it is available in .login
1379 (void) srccat(varval(STRhome), STRsldotlogin);
1381 if (loginsh || rdirs)
1384 /* Reset interrupt flag */
1389 /* Initing AFTER .cshrc is the Right Way */
1390 if (intty && !arginp) { /* PWP setup stuff */
1391 ed_Init(); /* init the new line editor */
1393 check_window_size(1); /* mung environment */
1394 #endif /* SIG_WINDOW */
1398 * Now are ready for the -v and -x flags
1406 * All the rest of the world is inside this call. The argument to process
1407 * indicates whether it should catch "error unwinds". Thus if we are a
1408 * interactive shell our call here will never return by being blown past on
1416 /* Take care of these (especially HUP) here instead of inside flush. */
1417 handle_pending_signals();
1420 xprintf("logout\n");
1426 goodbye(NULL, NULL);
1441 if (tpgrp > 0 && opgrp != shpgrp) {
1442 (void) setpgid(0, opgrp);
1443 (void) tcsetpgrp(FSHTTY, opgrp);
1444 (void) resetdisc(FSHTTY);
1446 #endif /* BSDJOBS */
1450 importpath(Char *cp)
1457 for (dp = cp; *dp; dp++)
1461 * i+2 where i is the number of colons in the path. There are i+1
1462 * directories in the path plus we need room for a zero terminator.
1464 pv = xcalloc(i + 2, sizeof(Char *));
1469 if ((c = *dp) == PATHSEP || c == 0) {
1471 pv[i++] = Strsave(*cp ? cp : STRdot);
1480 else if (*dp == '\\')
1482 #endif /* WINNT_NATIVE */
1486 cleanup_push(pv, blk_cleanup);
1487 setq(STRpath, pv, &shvhed, VAR_READWRITE);
1493 * Source to the file which is the catenation of the argument names.
1496 srccat(Char *cp, Char *dp)
1498 if (cp[0] == '/' && cp[1] == '\0')
1499 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
1507 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */
1509 #endif /* WINNT_NATIVE */
1511 ep = Strspl(cp, dp);
1512 cleanup_push(ep, xfree);
1513 ptr = short2str(ep);
1515 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
1522 * Source to a file putting the file descriptor in a safe place (> 2).
1524 #ifndef WINNT_NATIVE
1528 #endif /*WINNT_NATIVE*/
1529 srcfile(const char *f, int onlyown, int flag, Char **av)
1533 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1)
1535 cleanup_push(&unit, open_cleanup);
1536 unit = dmove(unit, -1);
1537 cleanup_ignore(&unit);
1538 cleanup_until(&unit);
1540 (void) close_on_exec(unit, 1);
1541 srcunit(unit, onlyown, flag, av);
1547 * Save the shell state, and establish new argument vector, and new input
1551 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av)
1553 st->insource = insource;
1555 /* Want to preserve the meaning of "source file >output".
1556 * Save old descriptors, move new 0,1,2 to safe places and assign
1557 * them to SH* and let process() redo 0,1,2 from them.
1559 * The macro returns true if d1 and d2 are good and they point to
1560 * different things. If you don't avoid saving duplicate
1561 * descriptors, you really limit the depth of "source" recursion
1562 * you can do because of all the open file descriptors. -IAN!
1564 #define NEED_SAVE_FD(d1,d2) \
1565 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
1566 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) )
1568 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */
1571 if (NEED_SAVE_FD(0,OLDSTD)) {
1572 st->OLDSTD = OLDSTD;
1573 OLDSTD = dmove(0, -1);
1574 (void)close_on_exec(OLDSTD, 1);
1576 if (NEED_SAVE_FD(1,SHOUT)) {
1578 SHOUT = dmove(1, -1);
1579 (void)close_on_exec(SHOUT, 1);
1581 if (NEED_SAVE_FD(2,SHDIAG)) {
1582 st->SHDIAG = SHDIAG;
1583 SHDIAG = dmove(2, -1);
1584 (void)close_on_exec(SHDIAG, 1);
1590 st->whyles = whyles;
1591 st->gointr = gointr;
1592 st->arginp = arginp;
1594 st->evalvec = evalvec;
1595 st->alvecp = alvecp;
1597 st->onelflg = onelflg;
1598 st->enterhist = enterhist;
1599 st->justpr = justpr;
1604 st->cantell = cantell;
1608 * we can now pass arguments to source.
1609 * For compatibility we do that only if arguments were really
1610 * passed, otherwise we keep the old, global $argv like before.
1612 if (av != NULL && *av != NULL) {
1614 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL)
1615 st->argv = saveblk(vp->vec);
1618 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
1624 SHIN = unit; /* Do this first */
1626 /* Establish new input arena */
1629 fseekp = feobp = fblocks = 0;
1635 intty = isatty(SHIN);
1650 * Restore the shell to a saved state
1653 st_restore(void *xst)
1655 struct saved_state *st;
1661 /* Reset input arena */
1664 Char** nfbuf = fbuf;
1665 int nfblocks = fblocks;
1669 for (i = 0; i < nfblocks; i++)
1677 insource = st->insource;
1679 if (st->OLDSTD != -1)
1680 xclose(OLDSTD), OLDSTD = st->OLDSTD;
1681 if (st->SHOUT != -1)
1682 xclose(SHOUT), SHOUT = st->SHOUT;
1683 if (st->SHDIAG != -1)
1684 xclose(SHDIAG), SHDIAG = st->SHDIAG;
1685 arginp = st->arginp;
1686 onelflg = st->onelflg;
1688 evalvec = st->evalvec;
1689 alvecp = st->alvecp;
1692 whyles = st->whyles;
1693 gointr = st->gointr;
1694 if (st->HIST != '\0')
1696 enterhist = st->enterhist;
1697 cantell = st->cantell;
1698 justpr = st->justpr;
1700 if (st->argv != NULL)
1701 setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
1702 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL)
1707 * Source to a unit. If onlyown it must be our file or our group or
1708 * we don't chance it. This occurs on ".cshrc"s and the like.
1711 srcunit(int unit, int onlyown, int hflg, Char **av)
1713 struct saved_state st;
1715 st.SHIN = -1; /* st_restore checks this */
1723 if (fstat(unit, &stb) < 0) {
1729 /* Does nothing before st_save() because st.SHIN == -1 */
1730 cleanup_push(&st, st_restore);
1733 cleanup_push(&pintr_disabled, disabled_cleanup);
1736 /* Save the current state and move us to a new state */
1737 st_save(&st, unit, hflg, NULL, av);
1740 * Now if we are allowing commands to be interrupted, we let ourselves be
1744 cleanup_until(&pintr_disabled);
1746 cleanup_push(&pintr_disabled, disabled_cleanup);
1749 process(0); /* 0 -> blow away on errors */
1751 /* Restore the old state */
1758 goodbye(Char **v, struct command *c)
1769 signal(SIGQUIT, SIG_IGN);
1770 sigaddset(&set, SIGQUIT);
1771 sigprocmask(SIG_UNBLOCK, &set, NULL);
1772 signal(SIGINT, SIG_IGN);
1773 sigaddset(&set, SIGINT);
1774 signal(SIGTERM, SIG_IGN);
1775 sigaddset(&set, SIGTERM);
1776 signal(SIGHUP, SIG_IGN);
1777 sigaddset(&set, SIGHUP);
1778 sigprocmask(SIG_UNBLOCK, &set, NULL);
1780 setintr = 0; /* No interrupts after "logout" */
1781 /* Trap errors inside .logout */
1782 omark = cleanup_push_mark();
1783 if (setexit() == 0) {
1784 if (!(adrof(STRlogout)))
1785 setcopy(STRlogout, STRnormal, VAR_READWRITE);
1786 #ifdef _PATH_DOTLOGOUT
1787 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1790 (void) srccat(varval(STRhome), STRsldtlogout);
1795 cleanup_pop_mark(omark);
1807 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1808 * directly because we poke child here. Otherwise we might continue
1809 * unwarrantedly (sic).
1813 xexit(getn(varval(STRstatus)));
1817 * in the event of a HUP we want to save the history
1823 setcopy(STRlogout, STRhangup, VAR_READWRITE);
1824 #ifdef _PATH_DOTLOGOUT
1825 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1828 (void) srccat(varval(STRhome), STRsldtlogout);
1835 * We kill the last foreground process group. It then becomes
1836 * responsible to propagate the SIGHUP to its progeny.
1839 struct process *pp, *np;
1841 for (pp = proclist.p_next; pp; pp = pp->p_next) {
1844 * Find if this job is in the foreground. It could be that
1845 * the process leader has exited and the foreground flag
1846 * is cleared for it.
1850 * If a process is in the foreground we try to kill
1851 * it's process group. If we succeed, then the
1852 * whole job is gone. Otherwise we keep going...
1853 * But avoid sending HUP to the shell again.
1855 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1856 np->p_flags &= ~PHUP;
1857 if (killpg(np->p_jobid, SIGHUP) != -1) {
1858 /* In case the job was suspended... */
1860 (void) killpg(np->p_jobid, SIGCONT);
1865 while ((np = np->p_friends) != pp);
1868 #endif /* POSIXJOBS */
1873 static Char *jobargv[2] = {STRjobs, 0};
1876 * Catch an interrupt, e.g. during lexical input.
1877 * If we are an interactive shell, we reset the interrupt catch
1878 * immediately. In any case we drain the shell output,
1879 * and finally go through the normal error mechanism, which
1880 * gets a chance to make the shell go away.
1882 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1898 dojobs(jobargv, NULL);
1899 stderror(ERR_NAME | ERR_INTR);
1902 /* MH - handle interrupted completions specially */
1904 if (InsideCompletion)
1905 stderror(ERR_SILENT);
1907 /* JV - Make sure we shut off inputl */
1909 (void) Cookedmode();
1913 #ifdef HAVE_GETPWENT
1918 * If we have an active "onintr" then we search for the label. Note that if
1919 * one does "onintr -" then we shan't be interruptible so we needn't worry
1926 else if (intty && wantnl) {
1929 * If we are editing a multi-line input command, and move to
1930 * the beginning of the line, we don't want to trash it when
1938 /* xputchar('\n'); *//* Some like this, others don't */
1939 (void) putraw('\r');
1940 (void) putraw('\n');
1943 stderror(ERR_SILENT);
1947 * Process is the main driving routine for the shell.
1948 * It runs all command processing, except for those within { ... }
1949 * in expressions (which is run by a routine evalav in sh.exp.c which
1950 * is a stripped down process), and `...` evaluation which is run
1951 * also by a subset of this code in sh.glob.c in the routine backeval.
1953 * The code here is a little strange because part of it is interruptible
1954 * and hence freeing of structures appears to occur when none is necessary
1955 * if this is ignored.
1957 * Note that if catch is not set then we will unwind on any error.
1958 * If an end-of-file occurs, we return.
1964 /* PWP: This might get nuked by longjmp so don't make it a register var */
1966 volatile int didexitset = 0;
1969 omark = cleanup_push_mark();
1972 int hadhist, old_pintr_disabled;
1975 if (didexitset == 0) {
1981 justpr = enterhist; /* execute if not entering history */
1987 cleanup_pop_mark(omark);
1993 * Every error is eventually caught here or the shell dies. It is
1994 * at this point that we clean up any left-over open files, by
1995 * closing all but a fixed number of pre-defined files. Thus
1996 * routines don't have to worry about leaving files open due to
1997 * deeper errors... they will get closed here.
2010 if (intty && prompt && evalvec == 0) {
2014 * Watch for logins/logouts. Next is scheduled commands stored
2015 * previously using "sched." Then execute periodic commands.
2016 * Following that, the prompt precmd is run.
2020 #endif /* !HAVENOUTMP */
2025 * If we are at the end of the input buffer then we are going to
2026 * read fresh stuff. Otherwise, we are rereading input and don't
2027 * need or want to prompt.
2029 if (fseekp == feobp && aret == TCSH_F_SEEK)
2030 printprompt(0, NULL);
2040 * Interruptible during interactive reads
2043 pintr_push_enable(&old_pintr_disabled);
2044 hadhist = lex(¶ml);
2046 cleanup_until(&old_pintr_disabled);
2047 cleanup_push(¶ml, lex_cleanup);
2050 * Echo not only on VERBOSE, but also with history expansion. If there
2051 * is a lexical error then we forego history echo.
2052 * Do not echo if we're only entering history (source -h).
2054 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) ||
2055 (!enterhist && adrof(STRverbose)))
2057 int odidfds = didfds;
2065 (void) alarm(0); /* Autologout OFF */
2066 alrmcatch_disabled = 1;
2069 * Save input text on the history list if reading in old history, or it
2070 * is from the terminal at the top level and not in a loop.
2072 * PWP: entry of items in the history list while in a while loop is done
2075 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun))
2076 savehist(¶ml, enterhist > 1);
2078 if (Expand && seterr)
2082 * Print lexical error messages, except when sourcing history lists.
2084 if (!enterhist && seterr)
2088 * If had a history command :p modifier then this is as far as we
2095 * If had a tellwhat from twenex() then do
2098 (void) tellmewhat(¶ml, NULL);
2106 * If we are interactive, try to continue jobs that we have stopped
2109 continue_jobs(¶ml);
2110 #endif /* BSDJOBS */
2113 * Check to see if the user typed "rm * .o" or something
2118 * Parse the words of the input into a parse tree.
2120 t = syntax(paraml.next, ¶ml, 0);
2122 * We cannot cleanup push here, because cd /blah; echo foo
2123 * would rewind t on the chdir error, and free the rest of the command
2132 * Execute the parse tree From: Michael Schroeder
2133 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2135 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
2142 if (windowchg || (catch && intty && !whyles && !tellwhat)) {
2143 (void) check_window_size(0); /* for window systems */
2145 #endif /* SIG_WINDOW */
2146 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB);
2148 if (cleanup_reset())
2149 cleanup_until(¶ml);
2153 cleanup_pop_mark(omark);
2156 handle_pending_signals();
2161 dosource(Char **t, struct command *c)
2169 if (*t && eq(*t, STRmh)) {
2171 stderror(ERR_NAME | ERR_HFLAG);
2174 else if (*t && eq(*t, STRmm)) {
2176 stderror(ERR_NAME | ERR_MFLAG);
2180 f = globone(*t++, G_ERROR);
2181 file = strsave(short2str(f));
2182 cleanup_push(file, xfree);
2184 t = glob_all_or_error(t);
2185 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet))
2186 stderror(ERR_SYSTEM, file, strerror(errno));
2187 cleanup_until(file);
2192 * If we are a login shell, then we don't want to tell
2193 * about any mail file unless its been modified
2194 * after the time we started.
2195 * This prevents us from telling the user things he already
2196 * knows, since the login program insists on saying
2202 * This version checks if the file is a directory, and if so,
2203 * tells you the number of files in it, otherwise do the old thang.
2204 * The magic "+1" in the time calculation is to compensate for
2205 * an AFS bug where directory mtimes are set to 1 second in
2220 if (v == NULL || v->vec == NULL)
2225 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
2228 if (chktim + intvl > t)
2231 char *filename = short2str(*vp);
2232 char *mboxdir = filename;
2234 if (stat(filename, &stb) < 0)
2236 #if defined(BSDTIMES) || defined(_SEQUENT_)
2237 new = stb.st_mtime > time0.tv_sec;
2239 new = stb.st_mtime > seconds0;
2241 if (S_ISDIR(stb.st_mode)) {
2247 tempfilename = xasprintf("%s/new", filename);
2249 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2251 * "filename/new" exists and is a directory; you are
2255 #if defined(BSDTIMES) || defined(_SEQUENT_)
2256 new = stb.st_mtime > time0.tv_sec;
2258 new = stb.st_mtime > seconds0;
2260 mboxdir = tempfilename;
2263 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) {
2264 xfree(tempfilename);
2268 mailbox = opendir(mboxdir);
2269 xfree(tempfilename);
2270 if (mailbox == NULL)
2274 if (!readdir(mailbox) || !readdir(mailbox)) {
2275 (void)closedir(mailbox);
2279 while (readdir(mailbox))
2282 (void)closedir(mailbox);
2287 xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2290 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2291 mailcount, filename);
2296 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime ||
2297 (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
2300 type = strsave(new ? CGETS(11, 6, "new ") : "");
2301 cleanup_push(type, xfree);
2303 xprintf(CGETS(11, 5, "You have %smail.\n"), type);
2305 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
2306 cleanup_until(type);
2313 * Extract a home directory from the password file
2314 * The argument points to a buffer where the name of the
2315 * user whose home directory is sought is currently.
2316 * We return home directory of the user, or NULL.
2319 gethdir(const Char *home)
2326 if (*home == '\0') {
2327 if ((h = varval(STRhome)) != STRNULL)
2336 if ((h = gettilde(home)) == NULL)
2343 * Move the initial descriptors to their eventual
2344 * resting places, closing all other units.
2352 #endif /* NLS_CATALOGS */
2353 #endif /* NLS_BUGS */
2356 didfds = 0; /* 0, 1, 2 aren't set up */
2357 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2358 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2359 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2360 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2361 #ifndef CLOSE_ON_EXEC
2362 didcch = 0; /* Havent closed for child */
2363 #endif /* CLOSE_ON_EXEC */
2365 isdiagatty = isatty(SHDIAG);
2369 isoutatty = isatty(SHOUT);
2375 #endif /* NLS_CATALOGS */
2376 #endif /* NLS_BUGS */
2388 if (loginsh && do_logout) {
2389 /* this is to send hangup signal to the develcon */
2390 /* we toggle DTR. clear dtr - sleep 1 - set dtr */
2391 /* ioctl will return ENOTTY for pty's but we ignore it */
2392 /* exitstat will run after disconnect */
2393 /* we sleep for 2 seconds to let things happen in */
2394 /* .logout and rechist() */
2397 (void) ioctl(FSHTTY, TIOCCDTR, NULL);
2399 (void) ioctl(FSHTTY, TIOCSDTR, NULL);
2400 #endif /* TIOCCDTR */
2405 struct process *pp, *np;
2406 pid_t mypid = getpid();
2407 /* Kill all processes marked for hup'ing */
2408 for (pp = proclist.p_next; pp; pp = pp->p_next) {
2411 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp &&
2412 np->p_parentid == mypid) {
2413 if (killpg(np->p_jobid, SIGHUP) != -1) {
2414 /* In case the job was suspended... */
2416 (void) killpg(np->p_jobid, SIGCONT);
2421 while ((np = np->p_friends) != pp);
2427 * We need to call catclose, because SVR4 leaves symlinks behind otherwise
2428 * in the catalog directories. We cannot close on a vforked() child,
2429 * because messages will stop working on the parent too.
2433 #endif /* NLS_CATALOGS */
2436 #endif /* WINNT_NATIVE */
2440 #ifndef _PATH_DEFPATH
2448 blkp = blk = xmalloc(sizeof(Char *) * 10);
2452 *blkp++ = Strsave(STRdot);
2456 #define DIRAPPEND(a) \
2457 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2461 DIRAPPEND(_PATH_LOCAL);
2465 DIRAPPEND(_PATH_USRUCB);
2469 DIRAPPEND(_PATH_USRBSD);
2473 DIRAPPEND(_PATH_BIN);
2477 DIRAPPEND(_PATH_USRBIN);
2484 *blkp++ = Strsave(STRdot);
2496 recdirs(NULL, adrof(STRsavedirs) != NULL);
2497 rechist(NULL, adrof(STRsavehist) != NULL);
2499 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */
2503 * Grab the tty repeatedly, and give up if we are not in the correct
2504 * tty process group.
2507 grabpgrp(int fd, pid_t desired)
2509 struct sigaction old;
2513 for (i = 0; i < 100; i++) {
2514 if ((pgrp = tcgetpgrp(fd)) == -1)
2516 if (pgrp == desired)
2518 (void)sigaction(SIGTTIN, NULL, &old);
2519 (void)signal(SIGTTIN, SIG_DFL);
2520 (void)kill(0, SIGTTIN);
2521 (void)sigaction(SIGTTIN, &old, NULL);