1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.136 2007/02/22 21:57:37 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 3.136 2007/02/22 21:57:37 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
81 jmp_buf_t reslab INIT_ZERO_STRUCT;
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;
144 static int srccat (Char *, Char *);
146 static int srcfile (const char *, int, int, Char **);
148 int srcfile (const char *, int, int, Char **);
149 #endif /*WINNT_NATIVE*/
150 static void srcunit (int, int, int, Char **);
151 static void mailchk (void);
152 #ifndef _PATH_DEFPATH
153 static Char **defaultpath (void);
155 static void record (void);
156 static void st_save (struct saved_state *, int, int,
158 static void st_restore (void *);
160 int main (int, char **);
163 main(int argc, char **argv)
166 volatile int nexececho = 0;
168 volatile int nverbose = 0;
169 volatile int rdirs = 0;
179 struct sigaction oparintr;
183 #endif /* WINNT_NATIVE */
184 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
185 (void) setlocale(LC_MESSAGES, "");
186 #endif /* NLS_CATALOGS && LC_MESSAGES */
190 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
191 # endif /* LC_CTYPE */
197 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace",
198 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w"));
200 #endif /* MALLOC_TRACE */
202 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX)
204 clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
205 # else /* ! _SC_CLK_TCK */
208 # else /* !CLK_TCK */
210 # endif /* CLK_TCK */
211 # endif /* _SC_CLK_TCK */
212 #endif /* !BSDTIMES && POSIX */
214 settimes(); /* Immed. estab. timing base */
220 * Make sure we have 0, 1, 2 open
221 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
225 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 &&
226 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1)
236 osinit(); /* Os dependent initialization */
242 t = strrchr(argv[0], '/');
245 char *s = strrchr(argv[0], '\\');
249 #endif /* WINNT_NATIVE */
250 t = t ? t + 1 : argv[0];
252 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */
253 tcsh = strcmp(progname, tcshstr) == 0;
257 * Initialize non constant strings
260 STR_BSHELL = SAVE(_PATH_BSHELL);
263 STR_SHELLPATH = SAVE(_PATH_TCSHELL);
266 STR_SHELLPATH = SAVE(_PATH_CSHELL);
269 STR_environ = blk2short(environ);
270 environ = short2blk(STR_environ); /* So that we can free it */
271 STR_WORD_CHARS = SAVE(WORD_CHARS);
277 word_chars = STR_WORD_CHARS;
278 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
280 /* Default history size to 100 */
281 setcopy(STRhistory, str2short("100"), VAR_READWRITE);
284 ffile = SAVE(tempv[0]);
286 if (eq(ffile, STRaout)) /* A.out's are quittable */
293 * We are a login shell if: 1. we were invoked as -<something> with
294 * optional arguments 2. or we were invoked only with the -l flag
296 loginsh = (**tempv == '-') || (argc == 2 &&
297 tempv[1][0] == '-' && tempv[1][1] == 'l' &&
298 tempv[1][2] == '\0');
300 /* No better way to find if we are a login shell */
302 loginsh = (argc == 1 && getppid() == 1);
303 **tempv = '-'; /* Avoid giving VMS an acidic stomach */
305 #endif /* _VMS_POSIX */
307 if (loginsh && **tempv != '-') {
311 * Mangle the argv space
316 argv0 = strspl("-", *tempv);
321 (void) time(&chktim);
326 NoNLSRebind = getenv("NOREBIND") != NULL;
330 # endif /* SETLOCALEBUG */
331 (void) setlocale(LC_ALL, "");
333 (void) setlocale(LC_COLLATE, "");
337 # endif /* SETLOCALEBUG */
340 # endif /* STRCOLLBUG */
345 for (k = 0200; k <= 0377 && !Isprint(CTL_ESC(k)); k++)
347 AsciiOnly = MB_CUR_MAX == 1 && k > 0377;
350 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
352 if (MapsAreInited && !NLSMapsAreInited)
357 * Initialize for periodic command intervals. Also, initialize the dummy
358 * tty list for login-watch.
360 (void) time(&t_period);
363 #endif /* !HAVENOUTMP */
367 * From: Jim Pace <jdp@research.att.com>
368 * tcsh does not work properly on the alliants through an rlogin session.
369 * The shell generally hangs. Also, reference to the controlling terminal
370 * does not work ( ie: echo foo > /dev/tty ).
372 * A security feature was added to rlogind affecting FX/80's Concentrix
373 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
374 * This security change also affects the FX/2800 series.
375 * The security change to rlogind requires the process group of an rlogin
376 * session become disassociated with the tty in rlogind.
378 * The changes needed are:
379 * 1. set the process group
380 * 2. reenable the control terminal
382 if (loginsh && isatty(SHIN)) {
383 ttyn = ttyname(SHIN);
385 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE);
387 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
388 (void) setpgid(0, shpgrp);
393 * Move the descriptors to safe places. The variable didfds is 0 while we
394 * have only FSH* to work with. When didfds is true, we have 0,1,2 and
395 * prefer to use these.
400 * Get and set the tty now
402 if ((ttyn = ttyname(SHIN)) != NULL) {
404 * Could use rindex to get rid of other possible path components, but
405 * hpux preserves the subdirectory /pty/ when storing the tty name in
406 * utmp, so we keep it too.
408 if (strncmp(ttyn, "/dev/", 5) == 0)
409 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
411 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
414 setv(STRtty, cp = SAVE(""), VAR_READWRITE);
416 * Initialize the shell variables. ARGV and PROMPT are initialized later.
417 * STATUS is also munged in several places. CHILD is munged when
422 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
423 * on shells running as root. Out of these, autologout should NOT be set
424 * for any psudo-terminals (this catches most window systems) and not for
425 * any terminal running X windows.
427 * At Ohio State, we have had problems with a user having his X session
428 * drop out from under him (on a Sun) because the shell in his master
429 * xterm timed out and exited.
431 * Really, this should be done with a program external to the shell, that
432 * watches for no activity (and NO running programs, such as dump) on a
433 * terminal for a long peroid of time, and then SIGHUPS the shell on that
436 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
437 * allways first check to see if loginsh or really root, then do things
440 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
441 * value of cp before using it! ("root can rsh too")
443 * PWP: keep the nested ifs; the order of the tests matters and a good
444 * (smart) C compiler might re-arange things wrong.
449 /* root always has a 15 minute autologout */
450 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE);
453 /* users get autologout set to 0 */
454 setcopy(STRautologout, STR0, VAR_READWRITE);
456 if (loginsh || (uid == 0)) {
458 /* only for login shells or root and we must have a tty */
459 if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) {
464 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) ||
465 ((Strncmp(cp, STRpts, 3) == 0) && cp[3] == '/'))) {
466 if (getenv("DISPLAY") == NULL) {
467 /* NOT on X window shells */
468 setcopy(STRautologout, STRdefautologout, VAR_READWRITE);
474 #endif /* AUTOLOGOUT */
476 sigset_interrupting(SIGALRM, queue_alrmcatch);
478 setcopy(STRstatus, STR0, VAR_READWRITE);
481 * get and set machine specific environment variables
487 * Publish the selected echo style
489 #if ECHO_STYLE != BSD_ECHO
491 # if ECHO_STYLE == NONE_ECHO
492 setcopy(STRecho_style, STRnone, VAR_READWRITE);
493 # endif /* ECHO_STYLE == NONE_ECHO */
494 # if ECHO_STYLE == SYSV_ECHO
495 setcopy(STRecho_style, STRsysv, VAR_READWRITE);
496 # endif /* ECHO_STYLE == SYSV_ECHO */
497 # if ECHO_STYLE == BOTH_ECHO
498 setcopy(STRecho_style, STRboth, VAR_READWRITE);
499 # endif /* ECHO_STYLE == BOTH_ECHO */
501 #endif /* ECHO_STYLE != BSD_ECHO */
502 setcopy(STRecho_style, STRbsd, VAR_READWRITE);
505 * increment the shell level.
509 if ((tcp = getenv("HOME")) != NULL)
510 cp = quote(SAVE(tcp));
515 fast = 1; /* No home -> can't read scripts */
517 setv(STRhome, cp, VAR_READWRITE);
519 dinit(cp); /* dinit thinks that HOME == cwd in a login
522 * Grab other useful things from the environment. Should we grab
526 char *cln, *cus, *cgr;
534 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE);
537 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE);
539 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE);
541 cln = getenv("LOGNAME");
542 cus = getenv("USER");
544 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE);
545 else if (cln != NULL)
546 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE);
547 else if ((pw = xgetpwuid(uid)) == NULL)
548 setcopy(STRuser, str2short("unknown"), VAR_READWRITE);
550 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE);
552 tsetenv(STRLOGNAME, varval(STRuser));
554 tsetenv(STRKUSER, varval(STRuser));
556 cgr = getenv("GROUP");
558 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
559 else if ((gr = xgetgrgid(gid)) == NULL)
560 setcopy(STRgroup, str2short("unknown"), VAR_READWRITE);
562 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE);
564 tsetenv(STRKGROUP, varval(STRgroup));
568 * HOST may be wrong, since rexd transports the entire environment on sun
569 * 3.x Just set it again
572 char cbuff[MAXHOSTNAMELEN];
574 if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
575 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */
576 tsetenv(STRHOST, str2short(cbuff));
579 tsetenv(STRHOST, str2short("unknown"));
585 * Try to determine the remote host we were logged in from.
588 #endif /* REMOTEHOST */
591 if ((tcp = getenv("SYSTYPE")) == NULL)
593 tsetenv(STRSYSTYPE, quote(str2short(tcp)));
597 * set editing on by default, unless running under Emacs as an inferior
599 * We try to do this intelligently. If $TERM is available, then it
600 * should determine if we should edit or not. $TERM is preserved
601 * across rlogin sessions, so we will not get confused if we rlogin
602 * under an emacs shell. Another advantage is that if we run an
603 * xterm under an emacs shell, then the $TERM will be set to
604 * xterm, so we are going to want to edit. Unfortunately emacs
605 * does not restore all the tty modes, so xterm is not very well
606 * set up. But this is not the shell's fault.
607 * Also don't edit if $TERM == wm, for when we're running under an ATK app.
608 * Finally, emacs compiled under terminfo, sets the terminal to dumb,
609 * so disable editing for that too.
611 * Unfortunately, in some cases the initial $TERM setting is "unknown",
612 * "dumb", or "network" which is then changed in the user's startup files.
613 * We fix this by setting noediting here if $TERM is unknown/dumb and
614 * if noediting is set, we switch on editing if $TERM is changed.
616 if ((tcp = getenv("TERM")) != NULL) {
617 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
618 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 ||
619 strcmp(tcp, "network") == 0;
620 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
625 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0);
629 * The 'edit' variable is either set or unset. It doesn't
630 * need a value. Making it 'emacs' might be confusing.
637 * still more mutability: make the complete routine automatically add the
638 * suffix of file names...
643 * Compatibility with tcsh >= 6.12 by default
645 setNS(STRcsubstnonl);
648 * Random default kill ring size
650 setcopy(STRkillring, str2short("30"), VAR_READWRITE);
653 * Re-initialize path if set in environment
655 if ((tcp = getenv("PATH")) == NULL) {
657 importpath(str2short(_PATH_DEFPATH));
658 #else /* !_PATH_DEFPATH */
659 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
660 #endif /* _PATH_DEFPATH */
662 * Export the path setting so that subsequent processes use the same path as we do.
664 exportpath(adrof(STRpath)->vec);
666 /* Importpath() allocates memory for the path, and the
667 * returned pointer from SAVE() was discarded, so
668 * this was a memory leak.. (sg)
670 * importpath(SAVE(tcp));
672 importpath(str2short(tcp));
676 /* If the SHELL environment variable ends with "tcsh", set
677 * STRshell to the same path. This is to facilitate using
678 * the executable in environments where the compiled-in
679 * default isn't appropriate (sg).
684 if ((tcp = getenv("SHELL")) != NULL) {
685 sh_len = strlen(tcp);
686 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) ||
687 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
688 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
693 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE);
696 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */
697 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL)
699 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp)));
700 #endif /* _OSD_POSIX */
703 if ((tcp = getenv("LS_COLORS")) != NULL)
704 parseLS_COLORS(str2short(tcp));
705 #endif /* COLOR_LS_F */
707 doldol = putn((int) getpid()); /* For $$ */
712 if ((tmp = getenv("TMP")) != NULL) {
713 tmp = xasprintf("%s/%s", tmp, "sh");
720 shtemp = Strspl(tmp2, doldol); /* For << */
723 #else /* !WINNT_NATIVE */
724 shtemp = Strspl(STRtmpsh, doldol); /* For << */
725 #endif /* WINNT_NATIVE */
728 * Record the interrupt states from the parent process. If the parent is
729 * non-interruptible our hand must be forced or we (and our children) won't
730 * be either. Our children inherit termination from our parent. We catch it
731 * only if we are the login shell.
733 sigaction(SIGINT, NULL, &parintr);
734 sigaction(SIGTERM, NULL, &parterm);
738 /* Enable process migration on ourselves and our progeny */
739 (void) signal(SIGMIGRATE, SIG_DFL);
743 * dspkanji/dspmbyte autosetting
745 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
746 #if defined(DSPMBYTE)
747 #if defined(NLS) && defined(LC_CTYPE)
748 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) {
750 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) {
752 autoset_dspmbyte(str2short(tcp));
754 #if defined(WINNT_NATIVE)
755 else if (!adrof(CHECK_MBYTEVAR))
756 nt_autoset_dspmbyte();
757 #endif /* WINNT_NATIVE */
760 fix_version(); /* publish the shell version */
762 if (argc > 1 && strcmp(argv[1], "--version") == 0) {
763 xprintf("%S\n", varval(STRversion));
766 if (argc > 1 && strcmp(argv[1], "--help") == 0) {
767 xprintf("%S\n\n", varval(STRversion));
768 xprintf(CGETS(11, 8, HELP_STRING));
772 * Process the arguments.
774 * Note that processing of -v/-x is actually delayed till after script
777 * We set the first character of our name to be '-' if we are a shell
778 * running interruptible commands. Many programs which examine ps'es
779 * use this to filter such shells out.
782 while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
783 *++tcp != '\0' && !batch) {
787 case 0: /* - Interruptible, no prompt */
793 case 'b': /* -b Next arg is input file */
797 case 'c': /* -c Command input from arg */
803 it relies on a 7 bit environment (/bin/sh), so it
804 pass ascii arguments with the 8th bit set */
805 if (!strcmp(argv[0], "sh"))
809 for (p = tempv[0]; *p; ++p)
813 arginp = SAVE(tempv[0]);
816 * we put the command into a variable
819 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
822 * * Give an error on -c arguments that end in * backslash to
823 * ensure that you don't make * nonportable csh scripts.
830 while (cp > arginp && *--cp == '\\')
832 if ((count & 1) != 0) {
840 case 'd': /* -d Load directory stack from file */
845 case 'D': /* -D Define environment variable */
850 if (dp = Strchr(cp, '=')) {
855 tsetenv(cp, STRNULL);
857 *tcp = '\0'; /* done with this argument */
861 case 'e': /* -e Exit on any error */
865 case 'f': /* -f Fast start */
869 case 'i': /* -i Interactive, even if !intty */
874 case 'm': /* -m read .cshrc (from su) */
878 case 'n': /* -n Don't execute */
882 case 'q': /* -q (Undoc'd) ... die on quit */
886 case 's': /* -s Read from std input */
890 case 't': /* -t Read one line from input */
896 case 'v': /* -v Echo hist expanded input */
897 nverbose = 1; /* ... later */
900 case 'x': /* -x Echo just before execution */
901 nexececho = 1; /* ... later */
904 case 'V': /* -V Echo hist expanded input */
905 setNS(STRverbose); /* NOW! */
908 case 'X': /* -X Echo just before execution */
909 setNS(STRecho); /* NOW! */
914 * This will cause children to be created using fork instead of
923 * for O/S's that don't do the argument parsing right in
924 * "#!/foo -f " scripts
928 default: /* Unknown command option */
930 stderror(ERR_TCSHUSAGE, tcp-1, progname);
937 if (quitit) /* With all due haste, for debugging */
938 (void) signal(SIGQUIT, SIG_DFL);
941 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
942 * arguments the first of them is the name of a shell file from which to
945 if (nofile == 0 && argc > 0) {
946 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE);
948 child = 1; /* So this ... */
949 /* ... doesn't return */
950 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
953 setmode(nofile, O_TEXT);
957 ffile = SAVE(tempv[0]);
959 * Replace FSHIN. Handle /dev/std{in,out,err} specially
960 * since once they are closed we cannot open them again.
961 * In that case we use our own saved descriptors
963 if ((SHIN = dmove(nofile, FSHIN)) < 0)
975 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
978 (void) close_on_exec(SHIN, 1);
980 /* argc not used any more */ tempv++;
984 * Call to closem() used to be part of initdesc(). Now called below where
985 * the script name argument has become stdin. Kernel may have used a file
986 * descriptor to hold the name of the script (setuid case) and this name
987 * mustn't be lost by closing the fd too soon.
992 * Consider input a tty if it really is or we are interactive. but not for
995 if (!(intty = isatty(SHIN))) {
1002 if (intty || (intact && isatty(SHOUT))) {
1003 if (!batch && (uid != euid || gid != egid)) {
1005 child = 1; /* So this ... */
1006 /* ... doesn't return */
1007 stderror(ERR_SYSTEM, progname, strerror(errno));
1011 isoutatty = isatty(SHOUT);
1012 isdiagatty = isatty(SHDIAG);
1014 * Decide whether we should play with signals or not. If we are explicitly
1015 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
1016 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
1017 * Note that in only the login shell is it likely that parent may have set
1018 * signals to be ignored
1020 if (loginsh || intact || (intty && isatty(SHOUT)))
1024 * Save the remaining arguments in argv.
1026 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
1029 * Set up the prompt.
1033 setcopy(STRprompt, STRdeftcshprompt, VAR_READWRITE);
1035 setcopy(STRprompt, STRdefcshprompt, VAR_READWRITE);
1036 /* that's a meta-questionmark */
1037 setcopy(STRprompt2, STRmquestion, VAR_READWRITE);
1038 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE);
1042 * If we are an interactive shell, then start fiddling with the signals;
1043 * this is a tricky game.
1045 shpgrp = mygetpgrp();
1048 struct sigaction osig;
1051 if (!quitit) /* Wary! */
1052 (void) signal(SIGQUIT, SIG_IGN);
1054 sigset_interrupting(SIGINT, queue_pintr);
1055 (void) signal(SIGTERM, SIG_IGN);
1058 * No reason I can see not to save history on all these events..
1059 * Most usual occurrence is in a window system, where we're not a login
1060 * shell, but might as well be... (sg)
1061 * But there might be races when lots of shells exit together...
1062 * [this is also incompatible].
1063 * We have to be mre careful here. If the parent wants to
1064 * ignore the signals then we leave them untouched...
1065 * We also only setup the handlers for shells that are trully
1068 sigaction(SIGHUP, NULL, &osig);
1069 if (loginsh || osig.sa_handler != SIG_IGN)
1070 /* exit processing on HUP */
1071 sigset_interrupting(SIGHUP, queue_phup);
1073 sigaction(SIGXCPU, NULL, &osig);
1074 if (loginsh || osig.sa_handler != SIG_IGN)
1075 /* exit processing on XCPU */
1076 sigset_interrupting(SIGXCPU, queue_phup);
1079 sigaction(SIGXFSZ, NULL, &osig);
1080 if (loginsh || osig.sa_handler != SIG_IGN)
1081 /* exit processing on XFSZ */
1082 sigset_interrupting(SIGXFSZ, queue_phup);
1085 if (quitit == 0 && arginp == 0) {
1087 (void) signal(SIGTSTP, SIG_IGN);
1090 (void) signal(SIGTTIN, SIG_IGN);
1093 (void) signal(SIGTTOU, SIG_IGN);
1096 * Wait till in foreground, in case someone stupidly runs csh &
1097 * dont want to try to grab away the tty.
1099 if (isatty(FSHDIAG))
1101 else if (isatty(FSHOUT))
1103 else if (isatty(OLDSTD))
1109 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1112 (void) setpgid(0, shpgrp);
1113 (void) tcsetpgrp(f, shpgrp);
1116 #ifdef BSDJOBS /* if we have tty job control */
1118 if ((tpgrp = tcgetpgrp(f)) != -1) {
1119 if (tpgrp != shpgrp) {
1120 struct sigaction old;
1122 sigaction(SIGTTIN, NULL, &old);
1123 signal(SIGTTIN, SIG_DFL);
1124 (void) kill(0, SIGTTIN);
1125 sigaction(SIGTTIN, &old, NULL);
1129 * Thanks to Matt Day for the POSIX references, and to
1130 * Paul Close for the SGI clarification.
1132 if (setdisc(f) != -1) {
1136 if (tcsetpgrp(f, shpgrp) == -1) {
1138 * On hpux 7.03 this fails with EPERM. This happens on
1139 * the 800 when opgrp != shpgrp at this point. (we were
1140 * forked from a non job control shell)
1141 * POSIX 7.2.4, says we failed because the process
1142 * group specified did not belong to a process
1143 * in the same session with the tty. So we set our
1144 * process group and try again.
1146 if (setpgid(0, shpgrp) == -1) {
1147 xprintf("setpgid:");
1150 if (tcsetpgrp(f, shpgrp) == -1) {
1151 xprintf("tcsetpgrp:");
1156 * We check the process group now. If it is the same, then
1157 * we don't need to set it again. On hpux 7.0 on the 300's
1158 * if we set it again it fails with EPERM. This is the
1159 * correct behavior according to POSIX 4.3.3 if the process
1160 * was a session leader .
1162 else if (shpgrp != mygetpgrp()) {
1163 if(setpgid(0, shpgrp) == -1) {
1164 xprintf("setpgid:");
1170 * But on irix 3.3 we need to set it again, even if it is
1171 * the same. We do that to tell the system that we
1172 * need BSD process group compatibility.
1175 (void) setpgid(0, shpgrp);
1177 (void) close_on_exec(dcopy(f, FSHTTY), 1);
1184 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1186 xprintf(CGETS(11, 2, "Thus no job control in this shell.\n"));
1188 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1189 * have access to tty, disable editing too
1195 #else /* BSDJOBS */ /* don't have job control, so frotz it */
1197 #endif /* BSDJOBS */
1200 if (setintr == 0 && parintr.sa_handler == SIG_DFL)
1204 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1205 * handler is installed with signal(2) or sigset(2). sigaction(2) must
1208 * David Dawes (dawes@physics.su.oz.au) Sept 1991
1210 sigset_interrupting(SIGCHLD, queue_pchild);
1212 if (intty && !arginp)
1213 (void) ed_Setup(editing);/* Get the tty state, and set defaults */
1214 /* Only alter the tty state if editing */
1217 * Set an exit here in case of an interrupt or error reading the shell
1222 (void)cleanup_push_mark(); /* There is no outer handler */
1223 if (setexit() != 0) /* PWP */
1228 haderr = 0; /* In case second time through */
1229 if (!fast && reenter == 0) {
1230 /* Will have varval(STRhome) here because set fast if don't */
1233 cleanup_push(&pintr_disabled, disabled_cleanup);
1234 setintr = 0;/*FIXRESET:cleanup*/
1235 /* onintr in /etc/ files has no effect */
1236 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/
1238 #ifdef _PATH_DOTLOGIN
1240 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1244 #ifdef _PATH_DOTCSHRC
1245 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
1247 if (!arginp && !onelflg && !havhash)
1250 #ifdef _PATH_DOTLOGIN
1252 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1255 cleanup_until(&pintr_disabled);
1261 (void) srccat(varval(STRhome), STRsldotlogin);
1263 /* upward compat. */
1264 if (!srccat(varval(STRhome), STRsldottcshrc))
1265 (void) srccat(varval(STRhome), STRsldotcshrc);
1267 if (!arginp && !onelflg && !havhash)
1271 * Source history before .login so that it is available in .login
1276 (void) srccat(varval(STRhome), STRsldotlogin);
1278 if (loginsh || rdirs)
1281 /* Reset interrupt flag */
1286 /* Initing AFTER .cshrc is the Right Way */
1287 if (intty && !arginp) { /* PWP setup stuff */
1288 ed_Init(); /* init the new line editor */
1290 check_window_size(1); /* mung environment */
1291 #endif /* SIG_WINDOW */
1295 * Now are ready for the -v and -x flags
1303 * All the rest of the world is inside this call. The argument to process
1304 * indicates whether it should catch "error unwinds". Thus if we are a
1305 * interactive shell our call here will never return by being blown past on
1315 xprintf("logout\n");
1321 goodbye(NULL, NULL);
1336 if (tpgrp > 0 && opgrp != shpgrp) {
1337 (void) setpgid(0, opgrp);
1338 (void) tcsetpgrp(FSHTTY, opgrp);
1339 (void) resetdisc(FSHTTY);
1341 #endif /* BSDJOBS */
1345 importpath(Char *cp)
1352 for (dp = cp; *dp; dp++)
1356 * i+2 where i is the number of colons in the path. There are i+1
1357 * directories in the path plus we need room for a zero terminator.
1359 pv = xcalloc(i + 2, sizeof(Char *));
1364 if ((c = *dp) == PATHSEP || c == 0) {
1366 pv[i++] = Strsave(*cp ? cp : STRdot);
1375 else if (*dp == '\\')
1377 #endif /* WINNT_NATIVE */
1381 cleanup_push(pv, blk_cleanup);
1382 setq(STRpath, pv, &shvhed, VAR_READWRITE);
1388 * Source to the file which is the catenation of the argument names.
1391 srccat(Char *cp, Char *dp)
1393 if (cp[0] == '/' && cp[1] == '\0')
1394 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
1402 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */
1404 #endif /* WINNT_NATIVE */
1406 ep = Strspl(cp, dp);
1407 cleanup_push(ep, xfree);
1408 ptr = short2str(ep);
1410 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
1417 * Source to a file putting the file descriptor in a safe place (> 2).
1419 #ifndef WINNT_NATIVE
1423 #endif /*WINNT_NATIVE*/
1424 srcfile(const char *f, int onlyown, int flag, Char **av)
1428 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1)
1431 setmode(unit, O_TEXT);
1433 cleanup_push(&unit, open_cleanup);
1434 unit = dmove(unit, -1);
1435 cleanup_ignore(&unit);
1436 cleanup_until(&unit);
1438 (void) close_on_exec(unit, 1);
1439 srcunit(unit, onlyown, flag, av);
1445 * Save the shell state, and establish new argument vector, and new input
1449 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av)
1451 st->insource = insource;
1453 /* Want to preserve the meaning of "source file >output".
1454 * Save old descriptors, move new 0,1,2 to safe places and assign
1455 * them to SH* and let process() redo 0,1,2 from them.
1457 * The macro returns true if d1 and d2 are good and they point to
1458 * different things. If you don't avoid saving duplicate
1459 * descriptors, you really limit the depth of "source" recursion
1460 * you can do because of all the open file descriptors. -IAN!
1462 #define NEED_SAVE_FD(d1,d2) \
1463 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
1464 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) )
1466 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */
1469 if (NEED_SAVE_FD(0,OLDSTD)) {
1470 st->OLDSTD = OLDSTD;
1471 OLDSTD = dmove(0, -1);
1472 (void)close_on_exec(OLDSTD, 1);
1474 if (NEED_SAVE_FD(1,SHOUT)) {
1476 SHOUT = dmove(1, -1);
1477 (void)close_on_exec(SHOUT, 1);
1479 if (NEED_SAVE_FD(2,SHDIAG)) {
1480 st->SHDIAG = SHDIAG;
1481 SHDIAG = dmove(2, -1);
1482 (void)close_on_exec(SHDIAG, 1);
1488 st->whyles = whyles;
1489 st->gointr = gointr;
1490 st->arginp = arginp;
1492 st->evalvec = evalvec;
1493 st->alvecp = alvecp;
1495 st->onelflg = onelflg;
1496 st->enterhist = enterhist;
1501 st->cantell = cantell;
1505 * we can now pass arguments to source.
1506 * For compatibility we do that only if arguments were really
1507 * passed, otherwise we keep the old, global $argv like before.
1509 if (av != NULL && *av != NULL) {
1511 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL)
1512 st->argv = saveblk(vp->vec);
1515 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
1521 SHIN = unit; /* Do this first */
1523 /* Establish new input arena */
1526 fseekp = feobp = fblocks = 0;
1532 intty = isatty(SHIN);
1547 * Restore the shell to a saved state
1550 st_restore(void *xst)
1552 struct saved_state *st;
1558 /* Reset input arena */
1561 Char** nfbuf = fbuf;
1562 int nfblocks = fblocks;
1566 for (i = 0; i < nfblocks; i++)
1574 insource = st->insource;
1576 if (st->OLDSTD != -1)
1577 xclose(OLDSTD), OLDSTD = st->OLDSTD;
1578 if (st->SHOUT != -1)
1579 xclose(SHOUT), SHOUT = st->SHOUT;
1580 if (st->SHDIAG != -1)
1581 xclose(SHDIAG), SHDIAG = st->SHDIAG;
1582 arginp = st->arginp;
1583 onelflg = st->onelflg;
1585 evalvec = st->evalvec;
1586 alvecp = st->alvecp;
1589 whyles = st->whyles;
1590 gointr = st->gointr;
1591 if (st->HIST != '\0')
1593 enterhist = st->enterhist;
1594 cantell = st->cantell;
1596 if (st->argv != NULL)
1597 setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
1598 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL)
1603 * Source to a unit. If onlyown it must be our file or our group or
1604 * we don't chance it. This occurs on ".cshrc"s and the like.
1607 srcunit(int unit, int onlyown, int hflg, Char **av)
1609 struct saved_state st;
1611 st.SHIN = -1; /* st_restore checks this */
1619 if (fstat(unit, &stb) < 0) {
1625 /* Does nothing before st_save() because st.SHIN == -1 */
1626 cleanup_push(&st, st_restore);
1629 cleanup_push(&pintr_disabled, disabled_cleanup);
1632 /* Save the current state and move us to a new state */
1633 st_save(&st, unit, hflg, NULL, av);
1636 * Now if we are allowing commands to be interrupted, we let ourselves be
1640 cleanup_until(&pintr_disabled);
1642 cleanup_push(&pintr_disabled, disabled_cleanup);
1645 process(0); /* 0 -> blow away on errors */
1647 /* Restore the old state */
1654 goodbye(Char **v, struct command *c)
1664 signal(SIGQUIT, SIG_IGN);
1665 sigaddset(&set, SIGQUIT);
1666 sigprocmask(SIG_UNBLOCK, &set, NULL);
1667 signal(SIGINT, SIG_IGN);
1668 sigaddset(&set, SIGINT);
1669 signal(SIGTERM, SIG_IGN);
1670 sigaddset(&set, SIGTERM);
1671 signal(SIGHUP, SIG_IGN);
1672 sigaddset(&set, SIGHUP);
1673 sigprocmask(SIG_UNBLOCK, &set, NULL);
1675 setintr = 0; /* No interrupts after "logout" */
1676 /* Trap errors inside .logout */
1677 omark = cleanup_push_mark();
1678 if (setexit() == 0) {
1679 if (!(adrof(STRlogout)))
1680 setcopy(STRlogout, STRnormal, VAR_READWRITE);
1681 #ifdef _PATH_DOTLOGOUT
1682 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1685 (void) srccat(varval(STRhome), STRsldtlogout);
1690 cleanup_pop_mark(omark);
1702 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1703 * directly because we poke child here. Otherwise we might continue
1704 * unwarrantedly (sic).
1708 xexit(getn(varval(STRstatus)));
1712 * in the event of a HUP we want to save the history
1718 setcopy(STRlogout, STRhangup, VAR_READWRITE);
1719 #ifdef _PATH_DOTLOGOUT
1720 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1723 (void) srccat(varval(STRhome), STRsldtlogout);
1730 * We kill the last foreground process group. It then becomes
1731 * responsible to propagate the SIGHUP to its progeny.
1734 struct process *pp, *np;
1736 for (pp = proclist.p_next; pp; pp = pp->p_next) {
1739 * Find if this job is in the foreground. It could be that
1740 * the process leader has exited and the foreground flag
1741 * is cleared for it.
1745 * If a process is in the foreground we try to kill
1746 * it's process group. If we succeed, then the
1747 * whole job is gone. Otherwise we keep going...
1748 * But avoid sending HUP to the shell again.
1750 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1751 np->p_flags &= ~PHUP;
1752 if (killpg(np->p_jobid, SIGHUP) != -1) {
1753 /* In case the job was suspended... */
1755 (void) killpg(np->p_jobid, SIGCONT);
1760 while ((np = np->p_friends) != pp);
1763 #endif /* POSIXJOBS */
1768 static Char *jobargv[2] = {STRjobs, 0};
1771 * Catch an interrupt, e.g. during lexical input.
1772 * If we are an interactive shell, we reset the interrupt catch
1773 * immediately. In any case we drain the shell output,
1774 * and finally go through the normal error mechanism, which
1775 * gets a chance to make the shell go away.
1777 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1793 dojobs(jobargv, NULL);
1794 stderror(ERR_NAME | ERR_INTR);
1797 /* MH - handle interrupted completions specially */
1799 if (InsideCompletion)
1800 stderror(ERR_SILENT);
1802 /* JV - Make sure we shut off inputl */
1804 (void) Cookedmode();
1808 #ifdef HAVE_GETPWENT
1813 * If we have an active "onintr" then we search for the label. Note that if
1814 * one does "onintr -" then we shan't be interruptible so we needn't worry
1821 else if (intty && wantnl) {
1824 * If we are editing a multi-line input command, and move to
1825 * the beginning of the line, we don't want to trash it when
1833 /* xputchar('\n'); *//* Some like this, others don't */
1834 (void) putraw('\r');
1835 (void) putraw('\n');
1838 stderror(ERR_SILENT);
1842 * Process is the main driving routine for the shell.
1843 * It runs all command processing, except for those within { ... }
1844 * in expressions (which is run by a routine evalav in sh.exp.c which
1845 * is a stripped down process), and `...` evaluation which is run
1846 * also by a subset of this code in sh.glob.c in the routine backeval.
1848 * The code here is a little strange because part of it is interruptible
1849 * and hence freeing of structures appears to occur when none is necessary
1850 * if this is ignored.
1852 * Note that if catch is not set then we will unwind on any error.
1853 * If an end-of-file occurs, we return.
1859 /* PWP: This might get nuked my longjmp so don't make it a register var */
1863 omark = cleanup_push_mark();
1867 int hadhist, old_pintr_disabled;
1872 justpr = enterhist; /* execute if not entering history */
1878 cleanup_pop_mark(omark);
1884 * Every error is eventually caught here or the shell dies. It is
1885 * at this point that we clean up any left-over open files, by
1886 * closing all but a fixed number of pre-defined files. Thus
1887 * routines don't have to worry about leaving files open due to
1888 * deeper errors... they will get closed here.
1901 if (intty && prompt && evalvec == 0) {
1905 * Watch for logins/logouts. Next is scheduled commands stored
1906 * previously using "sched." Then execute periodic commands.
1907 * Following that, the prompt precmd is run.
1911 #endif /* !HAVENOUTMP */
1916 * If we are at the end of the input buffer then we are going to
1917 * read fresh stuff. Otherwise, we are rereading input and don't
1918 * need or want to prompt.
1920 if (fseekp == feobp && aret == TCSH_F_SEEK)
1921 printprompt(0, NULL);
1931 * Interruptible during interactive reads
1934 pintr_push_enable(&old_pintr_disabled);
1935 hadhist = lex(¶ml);
1937 cleanup_until(&old_pintr_disabled);
1938 cleanup_push(¶ml, lex_cleanup);
1941 * Echo not only on VERBOSE, but also with history expansion. If there
1942 * is a lexical error then we forego history echo.
1944 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) ||
1945 adrof(STRverbose)) {
1946 int odidfds = didfds;
1954 (void) alarm(0); /* Autologout OFF */
1955 alrmcatch_disabled = 1;
1958 * Save input text on the history list if reading in old history, or it
1959 * is from the terminal at the top level and not in a loop.
1961 * PWP: entry of items in the history list while in a while loop is done
1964 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun))
1965 savehist(¶ml, enterhist > 1);
1967 if (Expand && seterr)
1971 * Print lexical error messages, except when sourcing history lists.
1973 if (!enterhist && seterr)
1977 * If had a history command :p modifier then this is as far as we
1984 * If had a tellwhat from twenex() then do
1987 (void) tellmewhat(¶ml, NULL);
1995 * If we are interactive, try to continue jobs that we have stopped
1998 continue_jobs(¶ml);
1999 #endif /* BSDJOBS */
2002 * Check to see if the user typed "rm * .o" or something
2007 * Parse the words of the input into a parse tree.
2009 t = syntax(paraml.next, ¶ml, 0);
2010 cleanup_push(t, syntax_cleanup);
2016 * Execute the parse tree From: Michael Schroeder
2017 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2019 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
2025 if (windowchg || (catch && intty && !whyles && !tellwhat)) {
2026 (void) check_window_size(0); /* for window systems */
2028 #endif /* SIG_WINDOW */
2029 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB);
2031 cleanup_until(¶ml);
2034 cleanup_pop_mark(omark);
2040 dosource(Char **t, struct command *c)
2048 if (*t && eq(*t, STRmh)) {
2050 stderror(ERR_NAME | ERR_HFLAG);
2053 else if (*t && eq(*t, STRmm)) {
2055 stderror(ERR_NAME | ERR_MFLAG);
2059 f = globone(*t++, G_ERROR);
2060 file = strsave(short2str(f));
2061 cleanup_push(file, xfree);
2063 t = glob_all_or_error(t);
2064 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet))
2065 stderror(ERR_SYSTEM, file, strerror(errno));
2066 cleanup_until(file);
2071 * If we are a login shell, then we don't want to tell
2072 * about any mail file unless its been modified
2073 * after the time we started.
2074 * This prevents us from telling the user things he already
2075 * knows, since the login program insists on saying
2081 * This version checks if the file is a directory, and if so,
2082 * tells you the number of files in it, otherwise do the old thang.
2083 * The magic "+1" in the time calculation is to compensate for
2084 * an AFS bug where directory mtimes are set to 1 second in
2099 if (v == NULL || v->vec == NULL)
2104 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
2107 if (chktim + intvl > t)
2110 char *filename = short2str(*vp);
2111 char *mboxdir = filename;
2113 if (stat(filename, &stb) < 0)
2115 #if defined(BSDTIMES) || defined(_SEQUENT_)
2116 new = stb.st_mtime > time0.tv_sec;
2118 new = stb.st_mtime > seconds0;
2120 if (S_ISDIR(stb.st_mode)) {
2126 tempfilename = xasprintf("%s/new", filename);
2128 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2130 * "filename/new" exists and is a directory; you are
2134 #if defined(BSDTIMES) || defined(_SEQUENT_)
2135 new = stb.st_mtime > time0.tv_sec;
2137 new = stb.st_mtime > seconds0;
2139 mboxdir = tempfilename;
2142 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) {
2143 xfree(tempfilename);
2147 mailbox = opendir(mboxdir);
2148 xfree(tempfilename);
2149 if (mailbox == NULL)
2153 if (!readdir(mailbox) || !readdir(mailbox))
2156 while (readdir(mailbox))
2163 xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2166 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2167 mailcount, filename);
2172 if (stb.st_size == 0 || stb.st_atime > stb.st_mtime ||
2173 (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
2176 type = strsave(new ? CGETS(11, 6, "new ") : "");
2177 cleanup_push(type, xfree);
2179 xprintf(CGETS(11, 5, "You have %smail.\n"), type);
2181 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
2182 cleanup_until(type);
2189 * Extract a home directory from the password file
2190 * The argument points to a buffer where the name of the
2191 * user whose home directory is sought is currently.
2192 * We return home directory of the user, or NULL.
2195 gethdir(const Char *home)
2202 if (*home == '\0') {
2203 if ((h = varval(STRhome)) != STRNULL)
2212 if ((h = gettilde(home)) == NULL)
2219 * Move the initial descriptors to their eventual
2220 * resting places, closing all other units.
2228 #endif /* NLS_CATALOGS */
2229 #endif /* NLS_BUGS */
2232 didfds = 0; /* 0, 1, 2 aren't set up */
2233 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2234 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2235 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2236 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2237 #ifndef CLOSE_ON_EXEC
2238 didcch = 0; /* Havent closed for child */
2239 #endif /* CLOSE_ON_EXEC */
2240 isdiagatty = isatty(SHDIAG);
2241 isoutatty = isatty(SHOUT);
2245 #endif /* NLS_CATALOGS */
2246 #endif /* NLS_BUGS */
2258 if (loginsh && do_logout) {
2259 /* this is to send hangup signal to the develcon */
2260 /* we toggle DTR. clear dtr - sleep 1 - set dtr */
2261 /* ioctl will return ENOTTY for pty's but we ignore it */
2262 /* exitstat will run after disconnect */
2263 /* we sleep for 2 seconds to let things happen in */
2264 /* .logout and rechist() */
2267 (void) ioctl(FSHTTY, TIOCCDTR, NULL);
2269 (void) ioctl(FSHTTY, TIOCSDTR, NULL);
2270 #endif /* TIOCCDTR */
2275 struct process *pp, *np;
2277 /* Kill all processes marked for hup'ing */
2278 for (pp = proclist.p_next; pp; pp = pp->p_next) {
2281 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) {
2282 if (killpg(np->p_jobid, SIGHUP) != -1) {
2283 /* In case the job was suspended... */
2285 (void) killpg(np->p_jobid, SIGCONT);
2290 while ((np = np->p_friends) != pp);
2296 * We need to call catclose, because SVR4 leaves symlinks behind otherwise
2297 * in the catalog directories. We cannot close on a vforked() child,
2298 * because messages will stop working on the parent too.
2302 #endif /* NLS_CATALOGS */
2305 #endif /* WINNT_NATIVE */
2309 #ifndef _PATH_DEFPATH
2317 blkp = blk = xmalloc(sizeof(Char *) * 10);
2321 *blkp++ = Strsave(STRdot);
2325 #define DIRAPPEND(a) \
2326 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2330 DIRAPPEND(_PATH_LOCAL);
2334 DIRAPPEND(_PATH_USRUCB);
2338 DIRAPPEND(_PATH_USRBSD);
2342 DIRAPPEND(_PATH_BIN);
2346 DIRAPPEND(_PATH_USRBIN);
2353 *blkp++ = Strsave(STRdot);
2365 recdirs(NULL, adrof(STRsavedirs) != NULL);
2366 rechist(NULL, adrof(STRsavehist) != NULL);