1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.145 2009/06/25 21:15:37 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 3.145 2009/06/25 21:15:37 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;
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 main(int argc, char **argv)
167 volatile int nexececho = 0;
169 volatile int nverbose = 0;
170 volatile int rdirs = 0;
180 struct sigaction oparintr;
184 #endif /* WINNT_NATIVE */
185 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
186 (void) setlocale(LC_MESSAGES, "");
187 #endif /* NLS_CATALOGS && LC_MESSAGES */
191 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
192 # endif /* LC_CTYPE */
198 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace",
199 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w"));
201 #endif /* MALLOC_TRACE */
203 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX)
205 clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
206 # else /* ! _SC_CLK_TCK */
209 # else /* !CLK_TCK */
211 # endif /* CLK_TCK */
212 # endif /* _SC_CLK_TCK */
213 #endif /* !BSDTIMES && POSIX */
215 settimes(); /* Immed. estab. timing base */
221 * Make sure we have 0, 1, 2 open
222 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
226 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 &&
227 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1)
233 osinit(); /* Os dependent initialization */
239 t = strrchr(argv[0], '/');
242 char *s = strrchr(argv[0], '\\');
246 #endif /* WINNT_NATIVE */
247 t = t ? t + 1 : argv[0];
249 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */
250 tcsh = strcmp(progname, tcshstr) == 0;
254 * Initialize non constant strings
257 STR_BSHELL = SAVE(_PATH_BSHELL);
260 STR_SHELLPATH = SAVE(_PATH_TCSHELL);
263 STR_SHELLPATH = SAVE(_PATH_CSHELL);
266 STR_environ = blk2short(environ);
267 environ = short2blk(STR_environ); /* So that we can free it */
268 STR_WORD_CHARS = SAVE(WORD_CHARS);
274 word_chars = STR_WORD_CHARS;
275 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
277 /* Default history size to 100 */
278 setcopy(STRhistory, str2short("100"), VAR_READWRITE);
281 ffile = SAVE(tempv[0]);
283 if (eq(ffile, STRaout)) /* A.out's are quittable */
290 * We are a login shell if: 1. we were invoked as -<something> with
291 * optional arguments 2. or we were invoked only with the -l flag
293 loginsh = (**tempv == '-') || (argc == 2 &&
294 tempv[1][0] == '-' && tempv[1][1] == 'l' &&
295 tempv[1][2] == '\0');
297 /* No better way to find if we are a login shell */
299 loginsh = (argc == 1 && getppid() == 1);
300 **tempv = '-'; /* Avoid giving VMS an acidic stomach */
302 #endif /* _VMS_POSIX */
304 if (loginsh && **tempv != '-') {
308 * Mangle the argv space
313 argv0 = strspl("-", *tempv);
318 (void) time(&chktim);
323 NoNLSRebind = getenv("NOREBIND") != NULL;
327 # endif /* SETLOCALEBUG */
328 (void) setlocale(LC_ALL, "");
330 (void) setlocale(LC_COLLATE, "");
334 # endif /* SETLOCALEBUG */
337 # endif /* STRCOLLBUG */
342 for (k = 0200; k <= 0377 && !Isprint(CTL_ESC(k)); k++)
344 AsciiOnly = MB_CUR_MAX == 1 && k > 0377;
347 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
349 if (MapsAreInited && !NLSMapsAreInited)
354 * Initialize for periodic command intervals. Also, initialize the dummy
355 * tty list for login-watch.
357 (void) time(&t_period);
360 #endif /* !HAVENOUTMP */
364 * From: Jim Pace <jdp@research.att.com>
365 * tcsh does not work properly on the alliants through an rlogin session.
366 * The shell generally hangs. Also, reference to the controlling terminal
367 * does not work ( ie: echo foo > /dev/tty ).
369 * A security feature was added to rlogind affecting FX/80's Concentrix
370 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
371 * This security change also affects the FX/2800 series.
372 * The security change to rlogind requires the process group of an rlogin
373 * session become disassociated with the tty in rlogind.
375 * The changes needed are:
376 * 1. set the process group
377 * 2. reenable the control terminal
379 if (loginsh && isatty(SHIN)) {
380 ttyn = ttyname(SHIN);
382 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE);
384 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
385 (void) setpgid(0, shpgrp);
390 * Move the descriptors to safe places. The variable didfds is 0 while we
391 * have only FSH* to work with. When didfds is true, we have 0,1,2 and
392 * prefer to use these.
397 * Get and set the tty now
399 if ((ttyn = ttyname(SHIN)) != NULL) {
401 * Could use rindex to get rid of other possible path components, but
402 * hpux preserves the subdirectory /pty/ when storing the tty name in
403 * utmp, so we keep it too.
405 if (strncmp(ttyn, "/dev/", 5) == 0)
406 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
408 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
411 setv(STRtty, cp = SAVE(""), VAR_READWRITE);
413 * Initialize the shell variables. ARGV and PROMPT are initialized later.
414 * STATUS is also munged in several places. CHILD is munged when
419 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
420 * on shells running as root. Out of these, autologout should NOT be set
421 * for any psudo-terminals (this catches most window systems) and not for
422 * any terminal running X windows.
424 * At Ohio State, we have had problems with a user having his X session
425 * drop out from under him (on a Sun) because the shell in his master
426 * xterm timed out and exited.
428 * Really, this should be done with a program external to the shell, that
429 * watches for no activity (and NO running programs, such as dump) on a
430 * terminal for a long peroid of time, and then SIGHUPS the shell on that
433 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
434 * allways first check to see if loginsh or really root, then do things
437 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
438 * value of cp before using it! ("root can rsh too")
440 * PWP: keep the nested ifs; the order of the tests matters and a good
441 * (smart) C compiler might re-arange things wrong.
446 /* root always has a 15 minute autologout */
447 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE);
450 /* users get autologout set to 0 */
451 setcopy(STRautologout, STR0, VAR_READWRITE);
453 if (loginsh || (uid == 0)) {
455 /* only for login shells or root and we must have a tty */
456 if ((cp2 = Strrchr(cp, (Char) '/')) != NULL) {
461 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) ||
462 Strstr(cp, STRptssl) != NULL)) {
463 if (getenv("DISPLAY") == NULL) {
464 /* NOT on X window shells */
465 setcopy(STRautologout, STRdefautologout, VAR_READWRITE);
471 #endif /* AUTOLOGOUT */
473 sigset_interrupting(SIGALRM, queue_alrmcatch);
475 setcopy(STRstatus, STR0, VAR_READWRITE);
478 * get and set machine specific environment variables
484 * Publish the selected echo style
486 #if ECHO_STYLE != BSD_ECHO
488 # if ECHO_STYLE == NONE_ECHO
489 setcopy(STRecho_style, STRnone, VAR_READWRITE);
490 # endif /* ECHO_STYLE == NONE_ECHO */
491 # if ECHO_STYLE == SYSV_ECHO
492 setcopy(STRecho_style, STRsysv, VAR_READWRITE);
493 # endif /* ECHO_STYLE == SYSV_ECHO */
494 # if ECHO_STYLE == BOTH_ECHO
495 setcopy(STRecho_style, STRboth, VAR_READWRITE);
496 # endif /* ECHO_STYLE == BOTH_ECHO */
498 #endif /* ECHO_STYLE != BSD_ECHO */
499 setcopy(STRecho_style, STRbsd, VAR_READWRITE);
502 * increment the shell level.
506 if ((tcp = getenv("HOME")) != NULL)
507 cp = quote(SAVE(tcp));
512 fast = 1; /* No home -> can't read scripts */
514 setv(STRhome, cp, VAR_READWRITE);
516 dinit(cp); /* dinit thinks that HOME == cwd in a login
519 * Grab other useful things from the environment. Should we grab
523 char *cln, *cus, *cgr;
531 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE);
534 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE);
536 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE);
538 cln = getenv("LOGNAME");
539 cus = getenv("USER");
541 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE);
542 else if (cln != NULL)
543 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE);
544 else if ((pw = xgetpwuid(uid)) == NULL)
545 setcopy(STRuser, str2short("unknown"), VAR_READWRITE);
547 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE);
549 tsetenv(STRLOGNAME, varval(STRuser));
551 tsetenv(STRKUSER, varval(STRuser));
553 cgr = getenv("GROUP");
555 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
556 else if ((gr = xgetgrgid(gid)) == NULL)
557 setcopy(STRgroup, str2short("unknown"), VAR_READWRITE);
559 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE);
561 tsetenv(STRKGROUP, varval(STRgroup));
565 * HOST may be wrong, since rexd transports the entire environment on sun
566 * 3.x Just set it again
569 char cbuff[MAXHOSTNAMELEN];
571 if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
572 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */
573 tsetenv(STRHOST, str2short(cbuff));
576 tsetenv(STRHOST, str2short("unknown"));
582 * Try to determine the remote host we were logged in from.
585 #endif /* REMOTEHOST */
588 if ((tcp = getenv("SYSTYPE")) == NULL)
590 tsetenv(STRSYSTYPE, quote(str2short(tcp)));
594 * set editing on by default, unless running under Emacs as an inferior
596 * We try to do this intelligently. If $TERM is available, then it
597 * should determine if we should edit or not. $TERM is preserved
598 * across rlogin sessions, so we will not get confused if we rlogin
599 * under an emacs shell. Another advantage is that if we run an
600 * xterm under an emacs shell, then the $TERM will be set to
601 * xterm, so we are going to want to edit. Unfortunately emacs
602 * does not restore all the tty modes, so xterm is not very well
603 * set up. But this is not the shell's fault.
604 * Also don't edit if $TERM == wm, for when we're running under an ATK app.
605 * Finally, emacs compiled under terminfo, sets the terminal to dumb,
606 * so disable editing for that too.
608 * Unfortunately, in some cases the initial $TERM setting is "unknown",
609 * "dumb", or "network" which is then changed in the user's startup files.
610 * We fix this by setting noediting here if $TERM is unknown/dumb and
611 * if noediting is set, we switch on editing if $TERM is changed.
613 if ((tcp = getenv("TERM")) != NULL) {
614 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
615 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 ||
616 strcmp(tcp, "network") == 0;
617 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
622 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0);
626 * The 'edit' variable is either set or unset. It doesn't
627 * need a value. Making it 'emacs' might be confusing.
634 * still more mutability: make the complete routine automatically add the
635 * suffix of file names...
640 * Compatibility with tcsh >= 6.12 by default
642 setNS(STRcsubstnonl);
645 * Random default kill ring size
647 setcopy(STRkillring, str2short("30"), VAR_READWRITE);
650 * Re-initialize path if set in environment
652 if ((tcp = getenv("PATH")) == NULL) {
654 importpath(str2short(_PATH_DEFPATH));
655 #else /* !_PATH_DEFPATH */
656 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
657 #endif /* _PATH_DEFPATH */
659 * Export the path setting so that subsequent processes use the same path as we do.
661 exportpath(adrof(STRpath)->vec);
663 /* Importpath() allocates memory for the path, and the
664 * returned pointer from SAVE() was discarded, so
665 * this was a memory leak.. (sg)
667 * importpath(SAVE(tcp));
669 importpath(str2short(tcp));
673 /* If the SHELL environment variable ends with "tcsh", set
674 * STRshell to the same path. This is to facilitate using
675 * the executable in environments where the compiled-in
676 * default isn't appropriate (sg).
681 if ((tcp = getenv("SHELL")) != NULL) {
682 sh_len = strlen(tcp);
683 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) ||
684 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
685 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
690 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE);
693 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */
694 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL)
696 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp)));
697 #endif /* _OSD_POSIX */
700 if ((tcp = getenv("LS_COLORS")) != NULL)
701 parseLS_COLORS(str2short(tcp));
702 #endif /* COLOR_LS_F */
704 doldol = putn((int) getpid()); /* For $$ */
709 if ((tmp = getenv("TMP")) != NULL) {
710 tmp = xasprintf("%s/%s", tmp, "sh");
717 shtemp = Strspl(tmp2, doldol); /* For << */
720 #else /* !WINNT_NATIVE */
721 shtemp = Strspl(STRtmpsh, doldol); /* For << */
722 #endif /* WINNT_NATIVE */
725 * Record the interrupt states from the parent process. If the parent is
726 * non-interruptible our hand must be forced or we (and our children) won't
727 * be either. Our children inherit termination from our parent. We catch it
728 * only if we are the login shell.
730 sigaction(SIGINT, NULL, &parintr);
731 sigaction(SIGTERM, NULL, &parterm);
735 /* Enable process migration on ourselves and our progeny */
736 (void) signal(SIGMIGRATE, SIG_DFL);
740 * dspkanji/dspmbyte autosetting
742 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
743 #if defined(DSPMBYTE)
744 #if defined(NLS) && defined(LC_CTYPE)
745 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR)) {
747 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR)) {
749 autoset_dspmbyte(str2short(tcp));
751 #if defined(WINNT_NATIVE)
752 else if (!adrof(CHECK_MBYTEVAR))
753 nt_autoset_dspmbyte();
754 #endif /* WINNT_NATIVE */
757 fix_version(); /* publish the shell version */
759 if (argc > 1 && strcmp(argv[1], "--version") == 0) {
760 xprintf("%S\n", varval(STRversion));
763 if (argc > 1 && strcmp(argv[1], "--help") == 0) {
764 xprintf("%S\n\n", varval(STRversion));
765 xprintf("%s", CGETS(11, 8, HELP_STRING));
769 * Process the arguments.
771 * Note that processing of -v/-x is actually delayed till after script
774 * We set the first character of our name to be '-' if we are a shell
775 * running interruptible commands. Many programs which examine ps'es
776 * use this to filter such shells out.
779 while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
780 *++tcp != '\0' && !batch) {
784 case 0: /* - Interruptible, no prompt */
790 case 'b': /* -b Next arg is input file */
794 case 'c': /* -c Command input from arg */
800 it relies on a 7 bit environment (/bin/sh), so it
801 pass ascii arguments with the 8th bit set */
802 if (!strcmp(argv[0], "sh"))
806 for (p = tempv[0]; *p; ++p)
810 arginp = SAVE(tempv[0]);
813 * we put the command into a variable
816 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
819 * * Give an error on -c arguments that end in * backslash to
820 * ensure that you don't make * nonportable csh scripts.
827 while (cp > arginp && *--cp == '\\')
829 if ((count & 1) != 0) {
837 case 'd': /* -d Load directory stack from file */
842 case 'D': /* -D Define environment variable */
847 if (dp = Strchr(cp, '=')) {
852 tsetenv(cp, STRNULL);
854 *tcp = '\0'; /* done with this argument */
858 case 'e': /* -e Exit on any error */
862 case 'f': /* -f Fast start */
866 case 'i': /* -i Interactive, even if !intty */
871 case 'm': /* -m read .cshrc (from su) */
875 case 'n': /* -n Don't execute */
879 case 'q': /* -q (Undoc'd) ... die on quit */
883 case 's': /* -s Read from std input */
887 case 't': /* -t Read one line from input */
893 case 'v': /* -v Echo hist expanded input */
894 nverbose = 1; /* ... later */
897 case 'x': /* -x Echo just before execution */
898 nexececho = 1; /* ... later */
901 case 'V': /* -V Echo hist expanded input */
902 setNS(STRverbose); /* NOW! */
905 case 'X': /* -X Echo just before execution */
906 setNS(STRecho); /* NOW! */
911 * This will cause children to be created using fork instead of
920 * for O/S's that don't do the argument parsing right in
921 * "#!/foo -f " scripts
925 default: /* Unknown command option */
927 stderror(ERR_TCSHUSAGE, tcp-1, progname);
934 if (quitit) /* With all due haste, for debugging */
935 (void) signal(SIGQUIT, SIG_DFL);
938 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
939 * arguments the first of them is the name of a shell file from which to
942 if (nofile == 0 && argc > 0) {
943 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE);
945 child = 1; /* So this ... */
946 /* ... doesn't return */
947 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
951 ffile = SAVE(tempv[0]);
953 * Replace FSHIN. Handle /dev/std{in,out,err} specially
954 * since once they are closed we cannot open them again.
955 * In that case we use our own saved descriptors
957 if ((SHIN = dmove(nofile, FSHIN)) < 0)
969 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
972 (void) close_on_exec(SHIN, 1);
974 /* argc not used any more */ tempv++;
978 * Call to closem() used to be part of initdesc(). Now called below where
979 * the script name argument has become stdin. Kernel may have used a file
980 * descriptor to hold the name of the script (setuid case) and this name
981 * mustn't be lost by closing the fd too soon.
986 * Consider input a tty if it really is or we are interactive. but not for
989 if (!(intty = isatty(SHIN))) {
996 if (intty || (intact && isatty(SHOUT))) {
997 if (!batch && (uid != euid || gid != egid)) {
999 child = 1; /* So this ... */
1000 /* ... doesn't return */
1001 stderror(ERR_SYSTEM, progname, strerror(errno));
1005 isoutatty = isatty(SHOUT);
1006 isdiagatty = isatty(SHDIAG);
1008 * Decide whether we should play with signals or not. If we are explicitly
1009 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
1010 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
1011 * Note that in only the login shell is it likely that parent may have set
1012 * signals to be ignored
1014 if (loginsh || intact || (intty && isatty(SHOUT)))
1018 * Save the remaining arguments in argv.
1020 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
1023 * Set up the prompt.
1027 setcopy(STRprompt, STRdeftcshprompt, VAR_READWRITE);
1029 setcopy(STRprompt, STRdefcshprompt, VAR_READWRITE);
1030 /* that's a meta-questionmark */
1031 setcopy(STRprompt2, STRmquestion, VAR_READWRITE);
1032 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE);
1036 * If we are an interactive shell, then start fiddling with the signals;
1037 * this is a tricky game.
1039 shpgrp = mygetpgrp();
1042 struct sigaction osig;
1045 if (!quitit) /* Wary! */
1046 (void) signal(SIGQUIT, SIG_IGN);
1048 sigset_interrupting(SIGINT, queue_pintr);
1049 (void) signal(SIGTERM, SIG_IGN);
1052 * No reason I can see not to save history on all these events..
1053 * Most usual occurrence is in a window system, where we're not a login
1054 * shell, but might as well be... (sg)
1055 * But there might be races when lots of shells exit together...
1056 * [this is also incompatible].
1057 * We have to be mre careful here. If the parent wants to
1058 * ignore the signals then we leave them untouched...
1059 * We also only setup the handlers for shells that are trully
1062 sigaction(SIGHUP, NULL, &osig);
1063 if (loginsh || osig.sa_handler != SIG_IGN)
1064 /* exit processing on HUP */
1065 sigset_interrupting(SIGHUP, queue_phup);
1067 sigaction(SIGXCPU, NULL, &osig);
1068 if (loginsh || osig.sa_handler != SIG_IGN)
1069 /* exit processing on XCPU */
1070 sigset_interrupting(SIGXCPU, queue_phup);
1073 sigaction(SIGXFSZ, NULL, &osig);
1074 if (loginsh || osig.sa_handler != SIG_IGN)
1075 /* exit processing on XFSZ */
1076 sigset_interrupting(SIGXFSZ, queue_phup);
1079 if (quitit == 0 && arginp == 0) {
1081 (void) signal(SIGTSTP, SIG_IGN);
1084 (void) signal(SIGTTIN, SIG_IGN);
1087 (void) signal(SIGTTOU, SIG_IGN);
1090 * Wait till in foreground, in case someone stupidly runs csh &
1091 * dont want to try to grab away the tty.
1093 if (isatty(FSHDIAG))
1095 else if (isatty(FSHOUT))
1097 else if (isatty(OLDSTD))
1103 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1106 (void) setpgid(0, shpgrp);
1107 (void) tcsetpgrp(f, shpgrp);
1110 #ifdef BSDJOBS /* if we have tty job control */
1111 if (grabpgrp(f, shpgrp) != -1) {
1113 * Thanks to Matt Day for the POSIX references, and to
1114 * Paul Close for the SGI clarification.
1116 if (setdisc(f) != -1) {
1120 if (tcsetpgrp(f, shpgrp) == -1) {
1122 * On hpux 7.03 this fails with EPERM. This happens on
1123 * the 800 when opgrp != shpgrp at this point. (we were
1124 * forked from a non job control shell)
1125 * POSIX 7.2.4, says we failed because the process
1126 * group specified did not belong to a process
1127 * in the same session with the tty. So we set our
1128 * process group and try again.
1130 if (setpgid(0, shpgrp) == -1) {
1131 xprintf("setpgid:");
1134 if (tcsetpgrp(f, shpgrp) == -1) {
1135 xprintf("tcsetpgrp:");
1140 * We check the process group now. If it is the same, then
1141 * we don't need to set it again. On hpux 7.0 on the 300's
1142 * if we set it again it fails with EPERM. This is the
1143 * correct behavior according to POSIX 4.3.3 if the process
1144 * was a session leader .
1146 else if (shpgrp != mygetpgrp()) {
1147 if(setpgid(0, shpgrp) == -1) {
1148 xprintf("setpgid:");
1154 * But on irix 3.3 we need to set it again, even if it is
1155 * the same. We do that to tell the system that we
1156 * need BSD process group compatibility.
1159 (void) setpgid(0, shpgrp);
1161 (void) close_on_exec(dcopy(f, FSHTTY), 1);
1168 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1171 CGETS(11, 2, "Thus no job control in this shell.\n"));
1173 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1174 * have access to tty, disable editing too
1180 #else /* BSDJOBS */ /* don't have job control, so frotz it */
1182 #endif /* BSDJOBS */
1185 if (setintr == 0 && parintr.sa_handler == SIG_DFL)
1189 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1190 * handler is installed with signal(2) or sigset(2). sigaction(2) must
1193 * David Dawes (dawes@physics.su.oz.au) Sept 1991
1195 sigset_interrupting(SIGCHLD, queue_pchild);
1197 if (intty && !arginp)
1198 (void) ed_Setup(editing);/* Get the tty state, and set defaults */
1199 /* Only alter the tty state if editing */
1202 * Set an exit here in case of an interrupt or error reading the shell
1207 (void)cleanup_push_mark(); /* There is no outer handler */
1208 if (setexit() != 0) /* PWP */
1213 haderr = 0; /* In case second time through */
1214 if (!fast && reenter == 0) {
1215 /* Will have varval(STRhome) here because set fast if don't */
1218 cleanup_push(&pintr_disabled, disabled_cleanup);
1219 setintr = 0;/*FIXRESET:cleanup*/
1220 /* onintr in /etc/ files has no effect */
1221 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/
1223 #ifdef _PATH_DOTLOGIN
1225 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1229 #ifdef _PATH_DOTCSHRC
1230 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
1232 if (!arginp && !onelflg && !havhash)
1235 #ifdef _PATH_DOTLOGIN
1237 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1240 cleanup_until(&pintr_disabled);
1246 (void) srccat(varval(STRhome), STRsldotlogin);
1248 /* upward compat. */
1249 if (!srccat(varval(STRhome), STRsldottcshrc))
1250 (void) srccat(varval(STRhome), STRsldotcshrc);
1252 if (!arginp && !onelflg && !havhash)
1256 * Source history before .login so that it is available in .login
1261 (void) srccat(varval(STRhome), STRsldotlogin);
1263 if (loginsh || rdirs)
1266 /* Reset interrupt flag */
1271 /* Initing AFTER .cshrc is the Right Way */
1272 if (intty && !arginp) { /* PWP setup stuff */
1273 ed_Init(); /* init the new line editor */
1275 check_window_size(1); /* mung environment */
1276 #endif /* SIG_WINDOW */
1280 * Now are ready for the -v and -x flags
1288 * All the rest of the world is inside this call. The argument to process
1289 * indicates whether it should catch "error unwinds". Thus if we are a
1290 * interactive shell our call here will never return by being blown past on
1300 xprintf("logout\n");
1306 goodbye(NULL, NULL);
1321 if (tpgrp > 0 && opgrp != shpgrp) {
1322 (void) setpgid(0, opgrp);
1323 (void) tcsetpgrp(FSHTTY, opgrp);
1324 (void) resetdisc(FSHTTY);
1326 #endif /* BSDJOBS */
1330 importpath(Char *cp)
1337 for (dp = cp; *dp; dp++)
1341 * i+2 where i is the number of colons in the path. There are i+1
1342 * directories in the path plus we need room for a zero terminator.
1344 pv = xcalloc(i + 2, sizeof(Char *));
1349 if ((c = *dp) == PATHSEP || c == 0) {
1351 pv[i++] = Strsave(*cp ? cp : STRdot);
1360 else if (*dp == '\\')
1362 #endif /* WINNT_NATIVE */
1366 cleanup_push(pv, blk_cleanup);
1367 setq(STRpath, pv, &shvhed, VAR_READWRITE);
1373 * Source to the file which is the catenation of the argument names.
1376 srccat(Char *cp, Char *dp)
1378 if (cp[0] == '/' && cp[1] == '\0')
1379 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
1387 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */
1389 #endif /* WINNT_NATIVE */
1391 ep = Strspl(cp, dp);
1392 cleanup_push(ep, xfree);
1393 ptr = short2str(ep);
1395 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
1402 * Source to a file putting the file descriptor in a safe place (> 2).
1404 #ifndef WINNT_NATIVE
1408 #endif /*WINNT_NATIVE*/
1409 srcfile(const char *f, int onlyown, int flag, Char **av)
1413 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1)
1415 cleanup_push(&unit, open_cleanup);
1416 unit = dmove(unit, -1);
1417 cleanup_ignore(&unit);
1418 cleanup_until(&unit);
1420 (void) close_on_exec(unit, 1);
1421 srcunit(unit, onlyown, flag, av);
1427 * Save the shell state, and establish new argument vector, and new input
1431 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av)
1433 st->insource = insource;
1435 /* Want to preserve the meaning of "source file >output".
1436 * Save old descriptors, move new 0,1,2 to safe places and assign
1437 * them to SH* and let process() redo 0,1,2 from them.
1439 * The macro returns true if d1 and d2 are good and they point to
1440 * different things. If you don't avoid saving duplicate
1441 * descriptors, you really limit the depth of "source" recursion
1442 * you can do because of all the open file descriptors. -IAN!
1444 #define NEED_SAVE_FD(d1,d2) \
1445 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
1446 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) )
1448 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */
1451 if (NEED_SAVE_FD(0,OLDSTD)) {
1452 st->OLDSTD = OLDSTD;
1453 OLDSTD = dmove(0, -1);
1454 (void)close_on_exec(OLDSTD, 1);
1456 if (NEED_SAVE_FD(1,SHOUT)) {
1458 SHOUT = dmove(1, -1);
1459 (void)close_on_exec(SHOUT, 1);
1461 if (NEED_SAVE_FD(2,SHDIAG)) {
1462 st->SHDIAG = SHDIAG;
1463 SHDIAG = dmove(2, -1);
1464 (void)close_on_exec(SHDIAG, 1);
1470 st->whyles = whyles;
1471 st->gointr = gointr;
1472 st->arginp = arginp;
1474 st->evalvec = evalvec;
1475 st->alvecp = alvecp;
1477 st->onelflg = onelflg;
1478 st->enterhist = enterhist;
1479 st->justpr = justpr;
1484 st->cantell = cantell;
1488 * we can now pass arguments to source.
1489 * For compatibility we do that only if arguments were really
1490 * passed, otherwise we keep the old, global $argv like before.
1492 if (av != NULL && *av != NULL) {
1494 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL)
1495 st->argv = saveblk(vp->vec);
1498 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
1504 SHIN = unit; /* Do this first */
1506 /* Establish new input arena */
1509 fseekp = feobp = fblocks = 0;
1515 intty = isatty(SHIN);
1530 * Restore the shell to a saved state
1533 st_restore(void *xst)
1535 struct saved_state *st;
1541 /* Reset input arena */
1544 Char** nfbuf = fbuf;
1545 int nfblocks = fblocks;
1549 for (i = 0; i < nfblocks; i++)
1557 insource = st->insource;
1559 if (st->OLDSTD != -1)
1560 xclose(OLDSTD), OLDSTD = st->OLDSTD;
1561 if (st->SHOUT != -1)
1562 xclose(SHOUT), SHOUT = st->SHOUT;
1563 if (st->SHDIAG != -1)
1564 xclose(SHDIAG), SHDIAG = st->SHDIAG;
1565 arginp = st->arginp;
1566 onelflg = st->onelflg;
1568 evalvec = st->evalvec;
1569 alvecp = st->alvecp;
1572 whyles = st->whyles;
1573 gointr = st->gointr;
1574 if (st->HIST != '\0')
1576 enterhist = st->enterhist;
1577 cantell = st->cantell;
1578 justpr = st->justpr;
1580 if (st->argv != NULL)
1581 setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
1582 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL)
1587 * Source to a unit. If onlyown it must be our file or our group or
1588 * we don't chance it. This occurs on ".cshrc"s and the like.
1591 srcunit(int unit, int onlyown, int hflg, Char **av)
1593 struct saved_state st;
1595 st.SHIN = -1; /* st_restore checks this */
1603 if (fstat(unit, &stb) < 0) {
1609 /* Does nothing before st_save() because st.SHIN == -1 */
1610 cleanup_push(&st, st_restore);
1613 cleanup_push(&pintr_disabled, disabled_cleanup);
1616 /* Save the current state and move us to a new state */
1617 st_save(&st, unit, hflg, NULL, av);
1620 * Now if we are allowing commands to be interrupted, we let ourselves be
1624 cleanup_until(&pintr_disabled);
1626 cleanup_push(&pintr_disabled, disabled_cleanup);
1629 process(0); /* 0 -> blow away on errors */
1631 /* Restore the old state */
1638 goodbye(Char **v, struct command *c)
1649 signal(SIGQUIT, SIG_IGN);
1650 sigaddset(&set, SIGQUIT);
1651 sigprocmask(SIG_UNBLOCK, &set, NULL);
1652 signal(SIGINT, SIG_IGN);
1653 sigaddset(&set, SIGINT);
1654 signal(SIGTERM, SIG_IGN);
1655 sigaddset(&set, SIGTERM);
1656 signal(SIGHUP, SIG_IGN);
1657 sigaddset(&set, SIGHUP);
1658 sigprocmask(SIG_UNBLOCK, &set, NULL);
1660 setintr = 0; /* No interrupts after "logout" */
1661 /* Trap errors inside .logout */
1662 omark = cleanup_push_mark();
1663 if (setexit() == 0) {
1664 if (!(adrof(STRlogout)))
1665 setcopy(STRlogout, STRnormal, VAR_READWRITE);
1666 #ifdef _PATH_DOTLOGOUT
1667 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1670 (void) srccat(varval(STRhome), STRsldtlogout);
1675 cleanup_pop_mark(omark);
1687 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1688 * directly because we poke child here. Otherwise we might continue
1689 * unwarrantedly (sic).
1693 xexit(getn(varval(STRstatus)));
1697 * in the event of a HUP we want to save the history
1703 setcopy(STRlogout, STRhangup, VAR_READWRITE);
1704 #ifdef _PATH_DOTLOGOUT
1705 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1708 (void) srccat(varval(STRhome), STRsldtlogout);
1715 * We kill the last foreground process group. It then becomes
1716 * responsible to propagate the SIGHUP to its progeny.
1719 struct process *pp, *np;
1721 for (pp = proclist.p_next; pp; pp = pp->p_next) {
1724 * Find if this job is in the foreground. It could be that
1725 * the process leader has exited and the foreground flag
1726 * is cleared for it.
1730 * If a process is in the foreground we try to kill
1731 * it's process group. If we succeed, then the
1732 * whole job is gone. Otherwise we keep going...
1733 * But avoid sending HUP to the shell again.
1735 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1736 np->p_flags &= ~PHUP;
1737 if (killpg(np->p_jobid, SIGHUP) != -1) {
1738 /* In case the job was suspended... */
1740 (void) killpg(np->p_jobid, SIGCONT);
1745 while ((np = np->p_friends) != pp);
1748 #endif /* POSIXJOBS */
1753 static Char *jobargv[2] = {STRjobs, 0};
1756 * Catch an interrupt, e.g. during lexical input.
1757 * If we are an interactive shell, we reset the interrupt catch
1758 * immediately. In any case we drain the shell output,
1759 * and finally go through the normal error mechanism, which
1760 * gets a chance to make the shell go away.
1762 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1778 dojobs(jobargv, NULL);
1779 stderror(ERR_NAME | ERR_INTR);
1782 /* MH - handle interrupted completions specially */
1784 if (InsideCompletion)
1785 stderror(ERR_SILENT);
1787 /* JV - Make sure we shut off inputl */
1789 (void) Cookedmode();
1793 #ifdef HAVE_GETPWENT
1798 * If we have an active "onintr" then we search for the label. Note that if
1799 * one does "onintr -" then we shan't be interruptible so we needn't worry
1806 else if (intty && wantnl) {
1809 * If we are editing a multi-line input command, and move to
1810 * the beginning of the line, we don't want to trash it when
1818 /* xputchar('\n'); *//* Some like this, others don't */
1819 (void) putraw('\r');
1820 (void) putraw('\n');
1823 stderror(ERR_SILENT);
1827 * Process is the main driving routine for the shell.
1828 * It runs all command processing, except for those within { ... }
1829 * in expressions (which is run by a routine evalav in sh.exp.c which
1830 * is a stripped down process), and `...` evaluation which is run
1831 * also by a subset of this code in sh.glob.c in the routine backeval.
1833 * The code here is a little strange because part of it is interruptible
1834 * and hence freeing of structures appears to occur when none is necessary
1835 * if this is ignored.
1837 * Note that if catch is not set then we will unwind on any error.
1838 * If an end-of-file occurs, we return.
1844 /* PWP: This might get nuked my longjmp so don't make it a register var */
1846 volatile int didexitset = 0;
1849 omark = cleanup_push_mark();
1852 int hadhist, old_pintr_disabled;
1855 if (didexitset == 0) {
1861 justpr = enterhist; /* execute if not entering history */
1867 cleanup_pop_mark(omark);
1873 * Every error is eventually caught here or the shell dies. It is
1874 * at this point that we clean up any left-over open files, by
1875 * closing all but a fixed number of pre-defined files. Thus
1876 * routines don't have to worry about leaving files open due to
1877 * deeper errors... they will get closed here.
1890 if (intty && prompt && evalvec == 0) {
1894 * Watch for logins/logouts. Next is scheduled commands stored
1895 * previously using "sched." Then execute periodic commands.
1896 * Following that, the prompt precmd is run.
1900 #endif /* !HAVENOUTMP */
1905 * If we are at the end of the input buffer then we are going to
1906 * read fresh stuff. Otherwise, we are rereading input and don't
1907 * need or want to prompt.
1909 if (fseekp == feobp && aret == TCSH_F_SEEK)
1910 printprompt(0, NULL);
1920 * Interruptible during interactive reads
1923 pintr_push_enable(&old_pintr_disabled);
1924 hadhist = lex(¶ml);
1926 cleanup_until(&old_pintr_disabled);
1927 cleanup_push(¶ml, lex_cleanup);
1930 * Echo not only on VERBOSE, but also with history expansion. If there
1931 * is a lexical error then we forego history echo.
1933 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) ||
1934 adrof(STRverbose)) {
1935 int odidfds = didfds;
1943 (void) alarm(0); /* Autologout OFF */
1944 alrmcatch_disabled = 1;
1947 * Save input text on the history list if reading in old history, or it
1948 * is from the terminal at the top level and not in a loop.
1950 * PWP: entry of items in the history list while in a while loop is done
1953 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun))
1954 savehist(¶ml, enterhist > 1);
1956 if (Expand && seterr)
1960 * Print lexical error messages, except when sourcing history lists.
1962 if (!enterhist && seterr)
1966 * If had a history command :p modifier then this is as far as we
1973 * If had a tellwhat from twenex() then do
1976 (void) tellmewhat(¶ml, NULL);
1984 * If we are interactive, try to continue jobs that we have stopped
1987 continue_jobs(¶ml);
1988 #endif /* BSDJOBS */
1991 * Check to see if the user typed "rm * .o" or something
1996 * Parse the words of the input into a parse tree.
1998 t = syntax(paraml.next, ¶ml, 0);
1999 cleanup_push(t, syntax_cleanup);
2005 * Execute the parse tree From: Michael Schroeder
2006 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2008 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
2014 if (windowchg || (catch && intty && !whyles && !tellwhat)) {
2015 (void) check_window_size(0); /* for window systems */
2017 #endif /* SIG_WINDOW */
2018 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB);
2020 cleanup_until(¶ml);
2022 cleanup_pop_mark(omark);
2029 dosource(Char **t, struct command *c)
2037 if (*t && eq(*t, STRmh)) {
2039 stderror(ERR_NAME | ERR_HFLAG);
2042 else if (*t && eq(*t, STRmm)) {
2044 stderror(ERR_NAME | ERR_MFLAG);
2048 f = globone(*t++, G_ERROR);
2049 file = strsave(short2str(f));
2050 cleanup_push(file, xfree);
2052 t = glob_all_or_error(t);
2053 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet))
2054 stderror(ERR_SYSTEM, file, strerror(errno));
2055 cleanup_until(file);
2060 * If we are a login shell, then we don't want to tell
2061 * about any mail file unless its been modified
2062 * after the time we started.
2063 * This prevents us from telling the user things he already
2064 * knows, since the login program insists on saying
2070 * This version checks if the file is a directory, and if so,
2071 * tells you the number of files in it, otherwise do the old thang.
2072 * The magic "+1" in the time calculation is to compensate for
2073 * an AFS bug where directory mtimes are set to 1 second in
2088 if (v == NULL || v->vec == NULL)
2093 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
2096 if (chktim + intvl > t)
2099 char *filename = short2str(*vp);
2100 char *mboxdir = filename;
2102 if (stat(filename, &stb) < 0)
2104 #if defined(BSDTIMES) || defined(_SEQUENT_)
2105 new = stb.st_mtime > time0.tv_sec;
2107 new = stb.st_mtime > seconds0;
2109 if (S_ISDIR(stb.st_mode)) {
2115 tempfilename = xasprintf("%s/new", filename);
2117 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2119 * "filename/new" exists and is a directory; you are
2123 #if defined(BSDTIMES) || defined(_SEQUENT_)
2124 new = stb.st_mtime > time0.tv_sec;
2126 new = stb.st_mtime > seconds0;
2128 mboxdir = tempfilename;
2131 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) {
2132 xfree(tempfilename);
2136 mailbox = opendir(mboxdir);
2137 xfree(tempfilename);
2138 if (mailbox == NULL)
2142 if (!readdir(mailbox) || !readdir(mailbox))
2145 while (readdir(mailbox))
2152 xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2155 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2156 mailcount, filename);
2161 if (stb.st_size == 0 || stb.st_atime > stb.st_mtime ||
2162 (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
2165 type = strsave(new ? CGETS(11, 6, "new ") : "");
2166 cleanup_push(type, xfree);
2168 xprintf(CGETS(11, 5, "You have %smail.\n"), type);
2170 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
2171 cleanup_until(type);
2178 * Extract a home directory from the password file
2179 * The argument points to a buffer where the name of the
2180 * user whose home directory is sought is currently.
2181 * We return home directory of the user, or NULL.
2184 gethdir(const Char *home)
2191 if (*home == '\0') {
2192 if ((h = varval(STRhome)) != STRNULL)
2201 if ((h = gettilde(home)) == NULL)
2208 * Move the initial descriptors to their eventual
2209 * resting places, closing all other units.
2217 #endif /* NLS_CATALOGS */
2218 #endif /* NLS_BUGS */
2221 didfds = 0; /* 0, 1, 2 aren't set up */
2222 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2223 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2224 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2225 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2226 #ifndef CLOSE_ON_EXEC
2227 didcch = 0; /* Havent closed for child */
2228 #endif /* CLOSE_ON_EXEC */
2229 isdiagatty = isatty(SHDIAG);
2230 isoutatty = isatty(SHOUT);
2234 #endif /* NLS_CATALOGS */
2235 #endif /* NLS_BUGS */
2247 if (loginsh && do_logout) {
2248 /* this is to send hangup signal to the develcon */
2249 /* we toggle DTR. clear dtr - sleep 1 - set dtr */
2250 /* ioctl will return ENOTTY for pty's but we ignore it */
2251 /* exitstat will run after disconnect */
2252 /* we sleep for 2 seconds to let things happen in */
2253 /* .logout and rechist() */
2256 (void) ioctl(FSHTTY, TIOCCDTR, NULL);
2258 (void) ioctl(FSHTTY, TIOCSDTR, NULL);
2259 #endif /* TIOCCDTR */
2264 struct process *pp, *np;
2266 /* Kill all processes marked for hup'ing */
2267 for (pp = proclist.p_next; pp; pp = pp->p_next) {
2270 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp) {
2271 if (killpg(np->p_jobid, SIGHUP) != -1) {
2272 /* In case the job was suspended... */
2274 (void) killpg(np->p_jobid, SIGCONT);
2279 while ((np = np->p_friends) != pp);
2285 * We need to call catclose, because SVR4 leaves symlinks behind otherwise
2286 * in the catalog directories. We cannot close on a vforked() child,
2287 * because messages will stop working on the parent too.
2291 #endif /* NLS_CATALOGS */
2294 #endif /* WINNT_NATIVE */
2298 #ifndef _PATH_DEFPATH
2306 blkp = blk = xmalloc(sizeof(Char *) * 10);
2310 *blkp++ = Strsave(STRdot);
2314 #define DIRAPPEND(a) \
2315 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2319 DIRAPPEND(_PATH_LOCAL);
2323 DIRAPPEND(_PATH_USRUCB);
2327 DIRAPPEND(_PATH_USRBSD);
2331 DIRAPPEND(_PATH_BIN);
2335 DIRAPPEND(_PATH_USRBIN);
2342 *blkp++ = Strsave(STRdot);
2354 recdirs(NULL, adrof(STRsavedirs) != NULL);
2355 rechist(NULL, adrof(STRsavehist) != NULL);
2360 * Grab the tty repeatedly, and give up if we are not in the correct
2361 * tty process group.
2364 grabpgrp(int fd, pid_t desired)
2366 struct sigaction old;
2370 for (i = 0; i < 100; i++) {
2371 if ((pgrp = tcgetpgrp(fd)) == -1)
2373 if (pgrp == desired)
2375 (void)sigaction(SIGTTIN, NULL, &old);
2376 (void)signal(SIGTTIN, SIG_DFL);
2377 (void)kill(0, SIGTTIN);
2378 (void)sigaction(SIGTTIN, &old, NULL);