1 /*
2 * sh.c: Main shell routines
3 */
4 /*-
5 * Copyright (c) 1980, 1991 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32 #define EXTERN /* Intern */
33 #include "sh.h"
34
35 #ifndef lint
36 char copyright[] =
37 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\
38 All rights reserved.\n";
39 #endif /* not lint */
40
41 #include "tc.h"
42 #include "ed.h"
43 #include "tw.h"
44
45 extern int MapsAreInited;
46 extern int NLSMapsAreInited;
47
48 /*
49 * C Shell
50 *
51 * Bill Joy, UC Berkeley, California, USA
52 * October 1978, May 1980
53 *
54 * Jim Kulp, IIASA, Laxenburg, Austria
55 * April 1980
56 *
57 * Filename recognition added:
58 * Ken Greer, Ind. Consultant, Palo Alto CA
59 * October 1983.
60 *
61 * Karl Kleinpaste, Computer Consoles, Inc.
62 * Added precmd, periodic/tperiod, prompt changes,
63 * directory stack hack, and login watch.
64 * Sometime March 1983 - Feb 1984.
65 *
66 * Added scheduled commands, including the "sched" command,
67 * plus the call to sched_run near the precmd et al
68 * routines.
69 * Upgraded scheduled events for running events while
70 * sitting idle at command input.
71 *
72 * Paul Placeway, Ohio State
73 * added stuff for running with twenex/inputl 9 Oct 1984.
74 *
75 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987
76 */
77
78 jmp_buf_t reslab IZERO_STRUCT;
79 struct wordent paraml IZERO_STRUCT;
80
81 static const char tcshstr[] = "tcsh";
82
83 struct sigaction parintr; /* Parents interrupt catch */
84 struct sigaction parterm; /* Parents terminate catch */
85
86 #ifdef TESLA
87 int do_logout = 0;
88 #endif /* TESLA */
89
90
91 int use_fork = 0; /* use fork() instead of vfork()? */
92
93 /*
94 * Magic pointer values. Used to specify other invalid conditions aside
95 * from null.
96 */
97 static Char INVCHAR;
98 Char *INVPTR = &INVCHAR;
99 Char **INVPPTR = &INVPTR;
100
101 static int fast = 0;
102 static int mflag = 0;
103 static int prompt = 1;
104 int enterhist = 0;
105 int tellwhat = 0;
106 time_t t_period;
107 Char *ffile = NULL;
108 int dolzero = 0;
109 int insource = 0;
110 int exitset = 0;
111 static time_t chktim; /* Time mail last checked */
112 char *progname;
113 int tcsh;
114
115 /*
116 * This preserves the input state of the shell. It is used by
117 * st_save and st_restore to manupulate shell state.
118 */
119 struct saved_state {
120 int insource;
121 int OLDSTD;
122 int SHIN;
123 int SHOUT;
124 int SHDIAG;
125 int intty;
126 struct whyle *whyles;
127 Char *gointr;
128 Char *arginp;
129 Char *evalp;
130 Char **evalvec;
131 Char *alvecp;
132 Char **alvec;
133 int onelflg;
134 int enterhist;
135 Char **argv;
136 Char **av;
137 Char HIST;
138 int cantell;
139 struct Bin B;
140 int justpr;
141 };
142
143 static int srccat (Char *, Char *);
144 #ifndef WINNT_NATIVE
145 static int srcfile (const char *, int, int, Char **);
146 #else
147 int srcfile (const char *, int, int, Char **);
148 #endif /*WINNT_NATIVE*/
149 static void srcunit (int, int, int, Char **);
150 static void mailchk (void);
151 #ifndef _PATH_DEFPATH
152 static Char **defaultpath (void);
153 #endif
154 static void record (void);
155 static void st_save (struct saved_state *, int, int,
156 Char **, Char **);
157 static void st_restore (void *);
158
159 int main (int, char **);
160
161 #ifndef LOCALEDIR
162 #define LOCALEDIR "/usr/share/locale"
163 #endif
164
165 #ifdef NLS_CATALOGS
166 static void
add_localedir_to_nlspath(const char * path)167 add_localedir_to_nlspath(const char *path)
168 {
169 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat";
170 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat";
171 char *old;
172 char *new, *new_p;
173 size_t len;
174 int add_LOC = 1;
175 int add_lang = 1;
176 char trypath[MAXPATHLEN];
177 struct stat st;
178
179 if (path == NULL)
180 return;
181
182 (void) xsnprintf(trypath, sizeof(trypath), "%s/C/LC_MESSAGES/tcsh.cat",
183 path);
184 if (stat(trypath, &st) == -1)
185 return;
186
187 if ((old = getenv("NLSPATH")) != NULL)
188 len = strlen(old) + 1; /* don't forget the colon. */
189 else
190 len = 0;
191
192 len += 2 * strlen(path) +
193 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */
194
195 new = new_p = xcalloc(len, 1);
196
197 if (old != NULL) {
198 size_t pathlen = strlen(path);
199 char *old_p;
200
201 (void) xsnprintf(new_p, len, "%s", old);
202 new_p += strlen(new_p);
203 len -= new_p - new;
204
205 /* Check if the paths we try to add are already present in NLSPATH.
206 If so, note it by setting the appropriate flag to 0. */
207 for (old_p = old; old_p; old_p = strchr(old_p, ':'),
208 old_p = old_p ? old_p + 1 : NULL) {
209 if (strncmp(old_p, path, pathlen) != 0)
210 continue;
211 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0)
212 add_LOC = 0;
213 else if (strncmp(old_p + pathlen, msgs_lang,
214 sizeof(msgs_lang) - 1) == 0)
215 add_lang = 0;
216 }
217 }
218
219 /* Add the message catalog paths not already present to NLSPATH. */
220 if (add_LOC || add_lang)
221 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s",
222 old ? ":" : "",
223 add_LOC ? path : "", add_LOC ? msgs_LOC : "",
224 add_LOC && add_lang ? ":" : "",
225 add_lang ? path : "", add_lang ? msgs_lang : "");
226
227 tsetenv(STRNLSPATH, str2short(new));
228 free(new);
229 }
230 #endif
231
232 int
main(int argc,char ** argv)233 main(int argc, char **argv)
234 {
235 int batch = 0;
236 volatile int nexececho = 0;
237 int nofile = 0;
238 volatile int nverbose = 0;
239 volatile int rdirs = 0;
240 volatile int exitcode = 0;
241 int quitit = 0;
242 Char *cp;
243 #ifdef AUTOLOGOUT
244 Char *cp2;
245 #endif
246 char *tcp, *ttyn;
247 int f, reenter;
248 char **tempv;
249 static const char *targinp = NULL;
250 int osetintr;
251 struct sigaction oparintr;
252
253 #ifdef WINNT_NATIVE
254 nt_init();
255 #endif /* WINNT_NATIVE */
256
257 (void)memset(&reslab, 0, sizeof(reslab));
258 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
259 (void) setlocale(LC_MESSAGES, "");
260 #endif /* NLS_CATALOGS && LC_MESSAGES */
261
262 #ifdef NLS
263 # ifdef LC_CTYPE
264 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
265 # endif /* LC_CTYPE */
266 #endif /* NLS */
267
268 STR_environ = blk2short(environ);
269 environ = short2blk(STR_environ); /* So that we can free it */
270
271 #ifdef NLS_CATALOGS
272 add_localedir_to_nlspath(LOCALEDIR);
273 #endif
274
275 nlsinit();
276 initlex(¶ml);
277
278 #ifdef MALLOC_TRACE
279 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace",
280 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w"));
281 mal_trace(1);
282 #endif /* MALLOC_TRACE */
283
284 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX)
285 # ifdef _SC_CLK_TCK
286 clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
287 # else /* ! _SC_CLK_TCK */
288 # ifdef CLK_TCK
289 clk_tck = CLK_TCK;
290 # else /* !CLK_TCK */
291 clk_tck = HZ;
292 # endif /* CLK_TCK */
293 # endif /* _SC_CLK_TCK */
294 #endif /* !BSDTIMES && POSIX */
295
296 settimes(); /* Immed. estab. timing base */
297 #ifdef TESLA
298 do_logout = 0;
299 #endif /* TESLA */
300
301 /*
302 * Make sure we have 0, 1, 2 open
303 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
304 */
305 {
306 do
307 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 &&
308 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1)
309 exit(1);
310 while (f < 3);
311 xclose(f);
312 }
313
314 osinit(); /* Os dependent initialization */
315
316
317 {
318 char *t;
319
320 t = strrchr(argv[0], '/');
321 #ifdef WINNT_NATIVE
322 {
323 char *s = strrchr(argv[0], '\\');
324 if (s)
325 t = s;
326 }
327 #endif /* WINNT_NATIVE */
328 t = t ? t + 1 : argv[0];
329 if (*t == '-') t++;
330 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */
331 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0;
332 }
333
334 /*
335 * Initialize non constant strings
336 */
337 #ifdef _PATH_BSHELL
338 STR_BSHELL = SAVE(_PATH_BSHELL);
339 #endif
340 #ifdef _PATH_TCSHELL
341 STR_SHELLPATH = SAVE(_PATH_TCSHELL);
342 #else
343 # ifdef _PATH_CSHELL
344 STR_SHELLPATH = SAVE(_PATH_CSHELL);
345 # endif
346 #endif
347 STR_WORD_CHARS = SAVE(WORD_CHARS);
348 STR_WORD_CHARS_VI = SAVE(WORD_CHARS_VI);
349
350 HIST = '!';
351 HISTSUB = '^';
352 PRCH = tcsh ? '>' : '%'; /* to replace %# in $prompt for normal users */
353 PRCHROOT = '#'; /* likewise for root */
354 word_chars = STR_WORD_CHARS;
355 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
356 anyerror = 1; /* for compatibility */
357 setcopy(STRanyerror, STRNULL, VAR_READWRITE);
358
359 /* Default history size to 100 */
360 setcopy(STRhistory, str2short("100"), VAR_READWRITE);
361 sethistory(100);
362
363 tempv = argv;
364 ffile = SAVE(tempv[0]);
365 dolzero = 0;
366 if (eq(ffile, STRaout)) /* A.out's are quittable */
367 quitit = 1;
368 uid = getuid();
369 gid = getgid();
370 euid = geteuid();
371 egid = getegid();
372 /*
373 * We are a login shell if: 1. we were invoked as -<something> with
374 * optional arguments 2. or we were invoked only with the -l flag
375 */
376 loginsh = (**tempv == '-') || (argc == 2 &&
377 tempv[1][0] == '-' && tempv[1][1] == 'l' &&
378 tempv[1][2] == '\0');
379 #ifdef _VMS_POSIX
380 /* No better way to find if we are a login shell */
381 if (!loginsh) {
382 loginsh = (argc == 1 && getppid() == 1);
383 **tempv = '-'; /* Avoid giving VMS an acidic stomach */
384 }
385 #endif /* _VMS_POSIX */
386
387 if (loginsh && **tempv != '-') {
388 char *argv0;
389
390 /*
391 * Mangle the argv space
392 */
393 tempv[1][0] = '\0';
394 tempv[1][1] = '\0';
395 tempv[1] = NULL;
396 argv0 = strspl("-", *tempv);
397 *tempv = argv0;
398 argc--;
399 }
400 if (loginsh) {
401 (void) time(&chktim);
402 setNS(STRloginsh);
403 }
404
405 NoNLSRebind = getenv("NOREBIND") != NULL;
406 #ifdef NLS
407 # ifdef SETLOCALEBUG
408 dont_free = 1;
409 # endif /* SETLOCALEBUG */
410 (void) setlocale(LC_ALL, "");
411 # ifdef LC_COLLATE
412 (void) setlocale(LC_COLLATE, "");
413 # endif
414 # ifdef SETLOCALEBUG
415 dont_free = 0;
416 # endif /* SETLOCALEBUG */
417 # ifdef STRCOLLBUG
418 fix_strcoll_bug();
419 # endif /* STRCOLLBUG */
420
421 /*
422 * On solaris ISO8859-1 contains no printable characters in the upper half
423 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte
424 * locales we are always AsciiOnly == 0.
425 */
426 if (MB_CUR_MAX == 1) {
427 int k;
428
429 for (k = 0200; k <= 0377 && !isprint(CTL_ESC(k)); k++)
430 continue;
431 AsciiOnly = k > 0377;
432 } else
433 AsciiOnly = 0;
434 #else
435 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
436 #endif /* NLS */
437 if (MapsAreInited && !NLSMapsAreInited)
438 ed_InitNLSMaps();
439 ResetArrowKeys();
440
441 /*
442 * Initialize for periodic command intervals. Also, initialize the dummy
443 * tty list for login-watch.
444 */
445 (void) time(&t_period);
446 #ifndef HAVENOUTMP
447 initwatch();
448 #endif /* !HAVENOUTMP */
449
450 #if defined(alliant)
451 /*
452 * From: Jim Pace <jdp@research.att.com>
453 * tcsh does not work properly on the alliants through an rlogin session.
454 * The shell generally hangs. Also, reference to the controlling terminal
455 * does not work ( ie: echo foo > /dev/tty ).
456 *
457 * A security feature was added to rlogind affecting FX/80's Concentrix
458 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
459 * This security change also affects the FX/2800 series.
460 * The security change to rlogind requires the process group of an rlogin
461 * session become disassociated with the tty in rlogind.
462 *
463 * The changes needed are:
464 * 1. set the process group
465 * 2. reenable the control terminal
466 */
467 if (loginsh && isatty(SHIN)) {
468 ttyn = ttyname(SHIN);
469 xclose(SHIN);
470 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE);
471 shpgrp = getpid();
472 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
473 (void) setpgid(0, shpgrp);
474 }
475 #endif /* alliant */
476
477 /*
478 * Move the descriptors to safe places. The variable didfds is 0 while we
479 * have only FSH* to work with. When didfds is true, we have 0,1,2 and
480 * prefer to use these.
481 */
482 initdesc();
483
484 cdtohome = 1;
485 setv(STRcdtohome, SAVE(""), VAR_READWRITE);
486
487 /*
488 * Get and set the tty now
489 */
490 if ((ttyn = ttyname(SHIN)) != NULL) {
491 /*
492 * Could use rindex to get rid of other possible path components, but
493 * hpux preserves the subdirectory /pty/ when storing the tty name in
494 * utmp, so we keep it too.
495 */
496 if (strncmp(ttyn, "/dev/", 5) == 0)
497 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
498 else
499 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
500 }
501 else
502 setv(STRtty, cp = SAVE(""), VAR_READWRITE);
503
504 /*
505 * Initialize the shell variables. ARGV and PROMPT are initialized later.
506 * STATUS is also munged in several places. CHILD is munged when
507 * forking/waiting
508 */
509
510 /*
511 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
512 * on shells running as root. Out of these, autologout should NOT be set
513 * for any psudo-terminals (this catches most window systems) and not for
514 * any terminal running X windows.
515 *
516 * At Ohio State, we have had problems with a user having his X session
517 * drop out from under him (on a Sun) because the shell in his master
518 * xterm timed out and exited.
519 *
520 * Really, this should be done with a program external to the shell, that
521 * watches for no activity (and NO running programs, such as dump) on a
522 * terminal for a long peroid of time, and then SIGHUPS the shell on that
523 * terminal.
524 *
525 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
526 * allways first check to see if loginsh or really root, then do things
527 * with ttyname()
528 *
529 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
530 * value of cp before using it! ("root can rsh too")
531 *
532 * PWP: keep the nested ifs; the order of the tests matters and a good
533 * (smart) C compiler might re-arange things wrong.
534 */
535 #ifdef AUTOLOGOUT
536 # ifdef convex
537 if (uid == 0)
538 /* root always has a 15 minute autologout */
539 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE);
540 else
541 if (loginsh)
542 /* users get autologout set to 0 */
543 setcopy(STRautologout, STR0, VAR_READWRITE);
544 # else /* convex */
545 if (loginsh || (uid == 0)) {
546 if (*cp) {
547 /* only for login shells or root and we must have a tty */
548 if (((cp2 = Strrchr(cp, (Char) '/')) != NULL) &&
549 (Strncmp(cp, STRptssl, 3) != 0)) {
550 cp2 = cp2 + 1;
551 }
552 else
553 cp2 = cp;
554 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) ||
555 Strstr(cp, STRptssl) != NULL)) {
556 if (getenv("DISPLAY") == NULL) {
557 /* NOT on X window shells */
558 setcopy(STRautologout, STRdefautologout, VAR_READWRITE);
559 }
560 }
561 }
562 }
563 # endif /* convex */
564 #endif /* AUTOLOGOUT */
565
566 sigset_interrupting(SIGALRM, queue_alrmcatch);
567
568 setstatus(0);
569
570 /*
571 * get and set machine specific environment variables
572 */
573 getmachine();
574
575
576 /*
577 * Publish the selected echo style
578 */
579 #if ECHO_STYLE != BSD_ECHO
580 if (tcsh) {
581 # if ECHO_STYLE == NONE_ECHO
582 setcopy(STRecho_style, STRnone, VAR_READWRITE);
583 # endif /* ECHO_STYLE == NONE_ECHO */
584 # if ECHO_STYLE == SYSV_ECHO
585 setcopy(STRecho_style, STRsysv, VAR_READWRITE);
586 # endif /* ECHO_STYLE == SYSV_ECHO */
587 # if ECHO_STYLE == BOTH_ECHO
588 setcopy(STRecho_style, STRboth, VAR_READWRITE);
589 # endif /* ECHO_STYLE == BOTH_ECHO */
590 } else
591 #endif /* ECHO_STYLE != BSD_ECHO */
592 setcopy(STRecho_style, STRbsd, VAR_READWRITE);
593
594 /*
595 * increment the shell level.
596 */
597 shlvl(1);
598
599 #ifdef __ANDROID__
600 /* On Android, $HOME either isn't set or set to /data, a R/O location.
601 Check for the environment variable EXTERNAL_STORAGE, which contains
602 the mount point of the external storage (SD card, mostly). If
603 EXTERNAL_STORAGE isn't set fall back to "/sdcard". Eventually
604 override $HOME so the environment is on the same page. */
605 if (((tcp = getenv("HOME")) != NULL && strcmp (tcp, "/data") != 0)
606 || (tcp = getenv("EXTERNAL_STORAGE")) != NULL) {
607 cp = quote(SAVE(tcp));
608 } else
609 cp = quote(SAVE("/sdcard"));
610 tsetenv(STRKHOME, cp);
611 #else
612 if ((tcp = getenv("HOME")) != NULL)
613 cp = quote(SAVE(tcp));
614 else
615 cp = NULL;
616 #endif
617
618 if (cp == NULL)
619 fast = 1; /* No home -> can't read scripts */
620 else
621 setv(STRhome, cp, VAR_READWRITE);
622
623 dinit(cp); /* dinit thinks that HOME == cwd in a login
624 * shell */
625 /*
626 * Grab other useful things from the environment. Should we grab
627 * everything??
628 */
629 {
630 char *cln, *cus, *cgr;
631 struct passwd *pw;
632 struct group *gr;
633
634
635 #ifdef apollo
636 int oid = getoid();
637
638 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE);
639 #endif /* apollo */
640
641 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE);
642 if ((pw = xgetpwuid(euid)) == NULL)
643 setcopy(STReuser, STRunknown, VAR_READWRITE);
644 else
645 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE);
646
647 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE);
648
649 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE);
650
651 cln = getenv("LOGNAME");
652 cus = getenv("USER");
653 if (cus != NULL)
654 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE);
655 else if (cln != NULL)
656 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE);
657 else if ((pw = xgetpwuid(uid)) == NULL)
658 setcopy(STRuser, STRunknown, VAR_READWRITE);
659 else
660 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE);
661 if (cln == NULL)
662 tsetenv(STRLOGNAME, varval(STRuser));
663 if (cus == NULL)
664 tsetenv(STRKUSER, varval(STRuser));
665
666 cgr = getenv("GROUP");
667 if (cgr != NULL)
668 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
669 else if ((gr = xgetgrgid(gid)) == NULL)
670 setcopy(STRgroup, STRunknown, VAR_READWRITE);
671 else
672 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE);
673 if (cgr == NULL)
674 tsetenv(STRKGROUP, varval(STRgroup));
675 }
676
677 /*
678 * HOST may be wrong, since rexd transports the entire environment on sun
679 * 3.x Just set it again
680 */
681 {
682 char cbuff[MAXHOSTNAMELEN];
683
684 if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
685 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */
686 tsetenv(STRHOST, str2short(cbuff));
687 }
688 else
689 tsetenv(STRHOST, STRunknown);
690 }
691
692
693 #ifdef REMOTEHOST
694 /*
695 * Try to determine the remote host we were logged in from.
696 */
697 remotehost();
698 #endif /* REMOTEHOST */
699
700 #ifdef apollo
701 if ((tcp = getenv("SYSTYPE")) == NULL)
702 tcp = "bsd4.3";
703 tsetenv(STRSYSTYPE, quote(str2short(tcp)));
704 #endif /* apollo */
705
706 /*
707 * set editing on by default, unless running under Emacs as an inferior
708 * shell.
709 * We try to do this intelligently. If $TERM is available, then it
710 * should determine if we should edit or not. $TERM is preserved
711 * across rlogin sessions, so we will not get confused if we rlogin
712 * under an emacs shell. Another advantage is that if we run an
713 * xterm under an emacs shell, then the $TERM will be set to
714 * xterm, so we are going to want to edit. Unfortunately emacs
715 * does not restore all the tty modes, so xterm is not very well
716 * set up. But this is not the shell's fault.
717 * Also don't edit if $TERM == wm, for when we're running under an ATK app.
718 * Finally, emacs compiled under terminfo, sets the terminal to dumb,
719 * so disable editing for that too.
720 *
721 * Unfortunately, in some cases the initial $TERM setting is "unknown",
722 * "dumb", or "network" which is then changed in the user's startup files.
723 * We fix this by setting noediting here if $TERM is unknown/dumb and
724 * if noediting is set, we switch on editing if $TERM is changed.
725 */
726 if ((tcp = getenv("TERM")) != NULL) {
727 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
728 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 ||
729 strcmp(tcp, "network") == 0;
730 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
731 !noediting;
732 }
733 else {
734 noediting = 0;
735 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0);
736 }
737
738 /*
739 * The 'edit' variable is either set or unset. It doesn't
740 * need a value. Making it 'emacs' might be confusing.
741 */
742 if (editing)
743 setNS(STRedit);
744
745
746 /*
747 * still more mutability: make the complete routine automatically add the
748 * suffix of file names...
749 */
750 setNS(STRaddsuffix);
751
752 /*
753 * Compatibility with tcsh >= 6.12 by default
754 */
755 setNS(STRcsubstnonl);
756
757 /*
758 * Random default kill ring size
759 */
760 setcopy(STRkillring, str2short("30"), VAR_READWRITE);
761
762 /*
763 * Re-initialize path if set in environment
764 */
765 if ((tcp = getenv("PATH")) == NULL) {
766 #ifdef _PATH_DEFPATH
767 importpath(str2short(_PATH_DEFPATH));
768 #else /* !_PATH_DEFPATH */
769 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
770 #endif /* _PATH_DEFPATH */
771 /*
772 * Export the path setting so that subsequent processes use the same path as we do.
773 */
774 exportpath(adrof(STRpath)->vec);
775 } else
776 /* Importpath() allocates memory for the path, and the
777 * returned pointer from SAVE() was discarded, so
778 * this was a memory leak.. (sg)
779 *
780 * importpath(SAVE(tcp));
781 */
782 importpath(str2short(tcp));
783
784
785 {
786 /* If the SHELL environment variable ends with "tcsh", set
787 * STRshell to the same path. This is to facilitate using
788 * the executable in environments where the compiled-in
789 * default isn't appropriate (sg).
790 */
791
792 size_t sh_len = 0;
793
794 if ((tcp = getenv("SHELL")) != NULL) {
795 sh_len = strlen(tcp);
796 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) ||
797 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
798 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
799 else
800 sh_len = 0;
801 }
802 if (sh_len == 0)
803 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE);
804 }
805
806 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */
807 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL)
808 tcp = "SHELL";
809 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp)));
810 #endif /* _OSD_POSIX */
811
812 #ifdef COLOR_LS_F
813 if ((tcp = getenv("LS_COLORS")) != NULL)
814 parseLS_COLORS(str2short(tcp));
815 if ((tcp = getenv("LSCOLORS")) != NULL)
816 parseLSCOLORS(str2short(tcp));
817 #endif /* COLOR_LS_F */
818
819 mainpid = getpid();
820 doldol = putn((tcsh_number_t)mainpid); /* For $$ */
821 #ifdef WINNT_NATIVE
822 {
823 char *tmp;
824 Char *tmp2;
825 if ((tmp = getenv("TMP")) != NULL) {
826 tmp = xasprintf("%s/%s", tmp, "sh");
827 tmp2 = SAVE(tmp);
828 xfree(tmp);
829 }
830 else {
831 tmp2 = SAVE("");
832 }
833 shtemp = Strspl(tmp2, doldol); /* For << */
834 xfree(tmp2);
835 }
836 #else /* !WINNT_NATIVE */
837 #ifdef HAVE_MKSTEMP
838 {
839 const char *tmpdir = getenv ("TMPDIR");
840 if (!tmpdir)
841 tmpdir = "/tmp";
842 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */
843 }
844 #else /* !HAVE_MKSTEMP */
845 shtemp = Strspl(STRtmpsh, doldol); /* For << */
846 #endif /* HAVE_MKSTEMP */
847 #endif /* WINNT_NATIVE */
848
849 /*
850 * Record the interrupt states from the parent process. If the parent is
851 * non-interruptible our hand must be forced or we (and our children) won't
852 * be either. Our children inherit termination from our parent. We catch it
853 * only if we are the login shell.
854 */
855 sigaction(SIGINT, NULL, &parintr);
856 sigaction(SIGTERM, NULL, &parterm);
857
858
859 #ifdef TCF
860 /* Enable process migration on ourselves and our progeny */
861 (void) signal(SIGMIGRATE, SIG_DFL);
862 #endif /* TCF */
863
864 /*
865 * dspkanji/dspmbyte autosetting
866 */
867 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
868 #if defined(DSPMBYTE)
869 #if defined(NLS) && defined(LC_CTYPE)
870 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR))
871 #else
872 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR))
873 #endif
874 {
875 autoset_dspmbyte(str2short(tcp));
876 }
877 #if defined(WINNT_NATIVE)
878 else if (!adrof(CHECK_MBYTEVAR))
879 nt_autoset_dspmbyte();
880 #endif /* WINNT_NATIVE */
881 #endif
882 #if defined(AUTOSET_KANJI)
883 # if defined(NLS) && defined(LC_CTYPE)
884 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL)
885 # else
886 if (getenv("LANG") != NULL)
887 # endif
888 autoset_kanji();
889 #endif /* AUTOSET_KANJI */
890 fix_version(); /* publish the shell version */
891
892 if (argc > 1 && strcmp(argv[1], "--version") == 0) {
893 xprintf("%" TCSH_S "\n", varval(STRversion));
894 xexit(0);
895 }
896 if (argc > 1 && strcmp(argv[1], "--help") == 0) {
897 xprintf("%" TCSH_S "\n\n", varval(STRversion));
898 xprintf("%s", CGETS(11, 8, HELP_STRING));
899 xexit(0);
900 }
901 /*
902 * Process the arguments.
903 *
904 * Note that processing of -v/-x is actually delayed till after script
905 * processing.
906 *
907 * We set the first character of our name to be '-' if we are a shell
908 * running interruptible commands. Many programs which examine ps'es
909 * use this to filter such shells out.
910 */
911 argc--, tempv++;
912 while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
913 *++tcp != '\0' && !batch) {
914 do
915 switch (*tcp++) {
916
917 case 0: /* - Interruptible, no prompt */
918 prompt = 0;
919 setintr = 1;
920 nofile = 1;
921 break;
922
923 case 'b': /* -b Next arg is input file */
924 batch = 1;
925 break;
926
927 case 'c': /* -c Command input from arg */
928 if (argc == 1)
929 xexit(0);
930 argc--, tempv++;
931 #ifdef M_XENIX
932 /* Xenix Vi bug:
933 it relies on a 7 bit environment (/bin/sh), so it
934 pass ascii arguments with the 8th bit set */
935 if (!strcmp(argv[0], "sh"))
936 {
937 char *p;
938
939 for (p = tempv[0]; *p; ++p)
940 *p &= ASCII;
941 }
942 #endif
943 targinp = tempv[0];
944 prompt = 0;
945 nofile = 1;
946 break;
947 case 'd': /* -d Load directory stack from file */
948 rdirs = 1;
949 break;
950
951 #ifdef apollo
952 case 'D': /* -D Define environment variable */
953 {
954 Char *dp;
955
956 cp = str2short(tcp);
957 if (dp = Strchr(cp, '=')) {
958 *dp++ = '\0';
959 tsetenv(cp, dp);
960 }
961 else
962 tsetenv(cp, STRNULL);
963 }
964 *tcp = '\0'; /* done with this argument */
965 break;
966 #endif /* apollo */
967
968 case 'e': /* -e Exit on any error */
969 exiterr = 1;
970 break;
971
972 case 'f': /* -f Fast start */
973 fast = 1;
974 break;
975
976 case 'i': /* -i Interactive, even if !intty */
977 intact = 1;
978 nofile = 1;
979 break;
980
981 case 'm': /* -m read .cshrc (from su) */
982 mflag = 1;
983 break;
984
985 case 'n': /* -n Don't execute */
986 noexec = 1;
987 break;
988
989 case 'q': /* -q (Undoc'd) ... die on quit */
990 quitit = 1;
991 break;
992
993 case 's': /* -s Read from std input */
994 nofile = 1;
995 break;
996
997 case 't': /* -t Read one line from input */
998 onelflg = 2;
999 prompt = 0;
1000 nofile = 1;
1001 break;
1002
1003 case 'v': /* -v Echo hist expanded input */
1004 nverbose = 1; /* ... later */
1005 break;
1006
1007 case 'x': /* -x Echo just before execution */
1008 nexececho = 1; /* ... later */
1009 break;
1010
1011 case 'V': /* -V Echo hist expanded input */
1012 setNS(STRverbose); /* NOW! */
1013 break;
1014
1015 case 'X': /* -X Echo just before execution */
1016 setNS(STRecho); /* NOW! */
1017 break;
1018
1019 case 'F':
1020 /*
1021 * This will cause children to be created using fork instead of
1022 * vfork.
1023 */
1024 use_fork = 1;
1025 break;
1026
1027 case ' ':
1028 case '\t':
1029 case '\r':
1030 case '\n':
1031 /*
1032 * for O/S's that don't do the argument parsing right in
1033 * "#!/foo -f " scripts
1034 */
1035 break;
1036
1037 default: /* Unknown command option */
1038 exiterr = 1;
1039 stderror(ERR_TCSHUSAGE, tcp-1, progname);
1040 break;
1041
1042 } while (*tcp);
1043 tempv++, argc--;
1044 }
1045
1046 if (quitit) /* With all due haste, for debugging */
1047 (void) signal(SIGQUIT, SIG_DFL);
1048
1049 /*
1050 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
1051 * arguments the first of them is the name of a shell file from which to
1052 * read commands.
1053 */
1054 if (nofile == 0 && argc > 0) {
1055 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE);
1056 if (nofile < 0) {
1057 child = 1; /* So this ... */
1058 /* ... doesn't return */
1059 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1060 }
1061 xfree(ffile);
1062 dolzero = 1;
1063 ffile = SAVE(tempv[0]);
1064 /*
1065 * Replace FSHIN. Handle /dev/std{in,out,err} specially
1066 * since once they are closed we cannot open them again.
1067 * In that case we use our own saved descriptors
1068 */
1069 if ((SHIN = dmove(nofile, FSHIN)) < 0)
1070 switch(nofile) {
1071 case 0:
1072 SHIN = FSHIN;
1073 break;
1074 case 1:
1075 SHIN = FSHOUT;
1076 break;
1077 case 2:
1078 SHIN = FSHDIAG;
1079 break;
1080 default:
1081 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1082 break;
1083 }
1084 (void) close_on_exec(SHIN, 1);
1085 prompt = 0;
1086 /* argc not used any more */ tempv++;
1087 }
1088
1089 /*
1090 * Call to closem() used to be part of initdesc(). Now called below where
1091 * the script name argument has become stdin. Kernel may have used a file
1092 * descriptor to hold the name of the script (setuid case) and this name
1093 * mustn't be lost by closing the fd too soon.
1094 */
1095 closem();
1096
1097 /*
1098 * Consider input a tty if it really is or we are interactive. but not for
1099 * editing (christos)
1100 */
1101 if (!(intty = isatty(SHIN))) {
1102 if (adrof(STRedit))
1103 unsetv(STRedit);
1104 editing = 0;
1105 }
1106 intty |= intact;
1107 #ifndef convex
1108 if (intty || (intact && isatty(SHOUT))) {
1109 if (!batch && (uid != euid || gid != egid)) {
1110 errno = EACCES;
1111 child = 1; /* So this ... */
1112 /* ... doesn't return */
1113 stderror(ERR_SYSTEM, progname, strerror(errno));
1114 }
1115 }
1116 #endif /* convex */
1117 isoutatty = isatty(SHOUT);
1118 isdiagatty = isatty(SHDIAG);
1119 /*
1120 * Decide whether we should play with signals or not. If we are explicitly
1121 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
1122 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
1123 * Note that in only the login shell is it likely that parent may have set
1124 * signals to be ignored
1125 */
1126 if (loginsh || intact || (intty && isatty(SHOUT)))
1127 setintr = 1;
1128 settell();
1129 /*
1130 * Save the remaining arguments in argv.
1131 */
1132 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
1133
1134 /*
1135 * Set up the prompt.
1136 */
1137 if (prompt) {
1138 setcopy(STRprompt, STRdefprompt, VAR_READWRITE);
1139 /* that's a meta-questionmark */
1140 setcopy(STRprompt2, STRmquestion, VAR_READWRITE);
1141 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE);
1142 }
1143
1144 /*
1145 * If we are an interactive shell, then start fiddling with the signals;
1146 * this is a tricky game.
1147 */
1148 shpgrp = mygetpgrp();
1149 opgrp = tpgrp = -1;
1150 if (setintr) {
1151 struct sigaction osig;
1152
1153 **argv = '-';
1154 if (!quitit) /* Wary! */
1155 (void) signal(SIGQUIT, SIG_IGN);
1156 pintr_disabled = 1;
1157 sigset_interrupting(SIGINT, queue_pintr);
1158 (void) signal(SIGTERM, SIG_IGN);
1159
1160 /*
1161 * No reason I can see not to save history on all these events..
1162 * Most usual occurrence is in a window system, where we're not a login
1163 * shell, but might as well be... (sg)
1164 * But there might be races when lots of shells exit together...
1165 * [this is also incompatible].
1166 * We have to be mre careful here. If the parent wants to
1167 * ignore the signals then we leave them untouched...
1168 * We also only setup the handlers for shells that are trully
1169 * interactive.
1170 */
1171 sigaction(SIGHUP, NULL, &osig);
1172 if (loginsh || osig.sa_handler != SIG_IGN)
1173 /* exit processing on HUP */
1174 sigset_interrupting(SIGHUP, queue_phup);
1175 #ifdef SIGXCPU
1176 sigaction(SIGXCPU, NULL, &osig);
1177 if (loginsh || osig.sa_handler != SIG_IGN)
1178 /* exit processing on XCPU */
1179 sigset_interrupting(SIGXCPU, queue_phup);
1180 #endif
1181 #ifdef SIGXFSZ
1182 sigaction(SIGXFSZ, NULL, &osig);
1183 if (loginsh || osig.sa_handler != SIG_IGN)
1184 /* exit processing on XFSZ */
1185 sigset_interrupting(SIGXFSZ, queue_phup);
1186 #endif
1187
1188 if (quitit == 0 && targinp == 0) {
1189 #ifdef SIGTSTP
1190 (void) signal(SIGTSTP, SIG_IGN);
1191 #endif
1192 #ifdef SIGTTIN
1193 (void) signal(SIGTTIN, SIG_IGN);
1194 #endif
1195 #ifdef SIGTTOU
1196 (void) signal(SIGTTOU, SIG_IGN);
1197 #endif
1198 /*
1199 * Wait till in foreground, in case someone stupidly runs csh &
1200 * dont want to try to grab away the tty.
1201 */
1202 if (isatty(FSHDIAG))
1203 f = FSHDIAG;
1204 else if (isatty(FSHOUT))
1205 f = FSHOUT;
1206 else if (isatty(OLDSTD))
1207 f = OLDSTD;
1208 else
1209 f = -1;
1210
1211 #ifdef NeXT
1212 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1213 if (f != -1 && shpgrp == 0) {
1214 shpgrp = getpid();
1215 (void) setpgid(0, shpgrp);
1216 (void) tcsetpgrp(f, shpgrp);
1217 }
1218 #endif /* NeXT */
1219 #ifdef BSDJOBS /* if we have tty job control */
1220 if (f != -1 && grabpgrp(f, shpgrp) != -1) {
1221 /*
1222 * Thanks to Matt Day for the POSIX references, and to
1223 * Paul Close for the SGI clarification.
1224 */
1225 if (setdisc(f) != -1) {
1226 opgrp = shpgrp;
1227 shpgrp = getpid();
1228 tpgrp = shpgrp;
1229 if (tcsetpgrp(f, shpgrp) == -1) {
1230 /*
1231 * On hpux 7.03 this fails with EPERM. This happens on
1232 * the 800 when opgrp != shpgrp at this point. (we were
1233 * forked from a non job control shell)
1234 * POSIX 7.2.4, says we failed because the process
1235 * group specified did not belong to a process
1236 * in the same session with the tty. So we set our
1237 * process group and try again.
1238 */
1239 if (setpgid(0, shpgrp) == -1) {
1240 xprintf("setpgid:");
1241 goto notty;
1242 }
1243 if (tcsetpgrp(f, shpgrp) == -1) {
1244 xprintf("tcsetpgrp:");
1245 goto notty;
1246 }
1247 }
1248 /*
1249 * We check the process group now. If it is the same, then
1250 * we don't need to set it again. On hpux 7.0 on the 300's
1251 * if we set it again it fails with EPERM. This is the
1252 * correct behavior according to POSIX 4.3.3 if the process
1253 * was a session leader .
1254 */
1255 else if (shpgrp != mygetpgrp()) {
1256 if (setpgid(0, shpgrp) == -1) {
1257 xprintf("setpgid:");
1258 goto notty;
1259 }
1260 }
1261 #ifdef IRIS4D
1262 /*
1263 * But on irix 3.3 we need to set it again, even if it is
1264 * the same. We do that to tell the system that we
1265 * need BSD process group compatibility.
1266 */
1267 else
1268 (void) setpgid(0, shpgrp);
1269 #endif
1270 (void) close_on_exec(dcopy(f, FSHTTY), 1);
1271 }
1272 else
1273 tpgrp = -1;
1274 }
1275 if (tpgrp == -1) {
1276 notty:
1277 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1278 strerror(errno));
1279 xprintf("%s",
1280 CGETS(11, 2, "Thus no job control in this shell.\n"));
1281 /*
1282 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1283 * have access to tty, disable editing too
1284 */
1285 if (adrof(STRedit))
1286 unsetv(STRedit);
1287 editing = 0;
1288 }
1289 #else /* BSDJOBS */ /* don't have job control, so frotz it */
1290 tpgrp = -1;
1291 #endif /* BSDJOBS */
1292 }
1293 }
1294 if (setintr == 0 && parintr.sa_handler == SIG_DFL)
1295 setintr = 1;
1296
1297 /*
1298 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1299 * handler is installed with signal(2) or sigset(2). sigaction(2) must
1300 * be used instead.
1301 *
1302 * David Dawes (dawes@physics.su.oz.au) Sept 1991
1303 */
1304 sigset_interrupting(SIGCHLD, queue_pchild);
1305
1306 if (intty && !targinp)
1307 (void) ed_Setup(editing);/* Get the tty state, and set defaults */
1308 /* Only alter the tty state if editing */
1309
1310 /*
1311 * Set an exit here in case of an interrupt or error reading the shell
1312 * start-up scripts.
1313 */
1314 osetintr = setintr;
1315 oparintr = parintr;
1316 (void)cleanup_push_mark(); /* There is no outer handler */
1317 if (setexit() != 0) /* PWP */
1318 reenter = 1;
1319 else
1320 reenter = 0;
1321 exitset++;
1322 haderr = 0; /* In case second time through */
1323 if (!fast && reenter == 0) {
1324 /* Will have varval(STRhome) here because set fast if don't */
1325 {
1326 pintr_disabled++;
1327 cleanup_push(&pintr_disabled, disabled_cleanup);
1328 setintr = 0;/*FIXRESET:cleanup*/
1329 /* onintr in /etc/ files has no effect */
1330 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/
1331 #ifdef LOGINFIRST
1332 #ifdef _PATH_DOTLOGIN
1333 if (loginsh)
1334 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1335 #endif
1336 #endif
1337
1338 #ifdef _PATH_DOTCSHRC
1339 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
1340 #endif
1341 if (!targinp && !onelflg && !havhash)
1342 dohash(NULL,NULL);
1343 #ifndef LOGINFIRST
1344 #ifdef _PATH_DOTLOGIN
1345 if (loginsh)
1346 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1347 #endif
1348 #endif
1349 cleanup_until(&pintr_disabled);
1350 setintr = osetintr;
1351 parintr = oparintr;
1352 }
1353 #ifdef LOGINFIRST
1354 if (loginsh)
1355 (void) srccat(varval(STRhome), STRsldotlogin);
1356 #endif
1357 /* upward compat. */
1358 if (!srccat(varval(STRhome), STRsldottcshrc))
1359 (void) srccat(varval(STRhome), STRsldotcshrc);
1360
1361 if (!targinp && !onelflg && !havhash)
1362 dohash(NULL,NULL);
1363
1364 /*
1365 * Source history before .login so that it is available in .login
1366 */
1367 loadhist(NULL, 0);
1368 #ifndef LOGINFIRST
1369 if (loginsh)
1370 (void) srccat(varval(STRhome), STRsldotlogin);
1371 #endif
1372 if (loginsh || rdirs)
1373 loaddirs(NULL);
1374 }
1375 /* Reset interrupt flag */
1376 setintr = osetintr;
1377 parintr = oparintr;
1378 exitset--;
1379
1380 /* Initing AFTER .cshrc is the Right Way */
1381 if (intty && !targinp) { /* PWP setup stuff */
1382 ed_Init(); /* init the new line editor */
1383 #ifdef SIG_WINDOW
1384 check_window_size(1); /* mung environment */
1385 #endif /* SIG_WINDOW */
1386 }
1387
1388 /*
1389 * Now are ready for the -v and -x flags
1390 */
1391 if (nverbose)
1392 setNS(STRverbose);
1393 if (nexececho)
1394 setNS(STRecho);
1395
1396
1397 if (targinp) {
1398 /* If this -c command caused an error before, skip processing */
1399 if (reenter && arginp) {
1400 exitcode = 1;
1401 goto done;
1402 }
1403
1404 arginp = SAVE(targinp);
1405 /*
1406 * we put the command into a variable
1407 */
1408 if (arginp != NULL)
1409 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
1410
1411 /*
1412 * * Give an error on -c arguments that end in * backslash to
1413 * ensure that you don't make * nonportable csh scripts.
1414 */
1415 {
1416 int count;
1417
1418 cp = Strend(arginp);
1419 count = 0;
1420 while (cp > arginp && *--cp == '\\')
1421 ++count;
1422 if ((count & 1) != 0) {
1423 exiterr = 1;
1424 stderror(ERR_ARGC);
1425 }
1426 }
1427 }
1428 /*
1429 * All the rest of the world is inside this call. The argument to process
1430 * indicates whether it should catch "error unwinds". Thus if we are a
1431 * interactive shell our call here will never return by being blown past on
1432 * an error.
1433 */
1434 process(setintr);
1435
1436 done:
1437 /*
1438 * Mop-up.
1439 */
1440 /* Take care of these (especially HUP) here instead of inside flush. */
1441 handle_pending_signals();
1442 if (intty) {
1443 if (loginsh) {
1444 xprintf("logout\n");
1445 xclose(SHIN);
1446 child = 1;
1447 #ifdef TESLA
1448 do_logout = 1;
1449 #endif /* TESLA */
1450 goodbye(NULL, NULL);
1451 }
1452 else {
1453 xprintf("exit\n");
1454 }
1455 }
1456 record();
1457 exitstat();
1458 return exitcode;
1459 }
1460
1461 void
untty(void)1462 untty(void)
1463 {
1464 #ifdef BSDJOBS
1465 if (tpgrp > 0 && opgrp != shpgrp) {
1466 (void) setpgid(0, opgrp);
1467 (void) tcsetpgrp(FSHTTY, opgrp);
1468 (void) resetdisc(FSHTTY);
1469 }
1470 #endif /* BSDJOBS */
1471 }
1472
1473 void
importpath(Char * cp)1474 importpath(Char *cp)
1475 {
1476 size_t i = 0;
1477 Char *dp;
1478 Char **pv;
1479 int c;
1480
1481 for (dp = cp; *dp; dp++)
1482 if (*dp == PATHSEP)
1483 i++;
1484 /*
1485 * i+2 where i is the number of colons in the path. There are i+1
1486 * directories in the path plus we need room for a zero terminator.
1487 */
1488 pv = xcalloc(i + 2, sizeof(Char *));
1489 dp = cp;
1490 i = 0;
1491 if (*dp)
1492 for (;;) {
1493 if ((c = *dp) == PATHSEP || c == 0) {
1494 *dp = 0;
1495 pv[i++] = Strsave(*cp ? cp : STRdot);
1496 if (c) {
1497 cp = dp + 1;
1498 *dp = PATHSEP;
1499 }
1500 else
1501 break;
1502 }
1503 #ifdef WINNT_NATIVE
1504 else if (*dp == '\\')
1505 *dp = '/';
1506 #endif /* WINNT_NATIVE */
1507 dp++;
1508 }
1509 pv[i] = 0;
1510 cleanup_push(pv, blk_cleanup);
1511 setq(STRpath, pv, &shvhed, VAR_READWRITE);
1512 cleanup_ignore(pv);
1513 cleanup_until(pv);
1514 }
1515
1516 /*
1517 * Source to the file which is the catenation of the argument names.
1518 */
1519 static int
srccat(Char * cp,Char * dp)1520 srccat(Char *cp, Char *dp)
1521 {
1522 if (cp[0] == '/' && cp[1] == '\0')
1523 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
1524 else {
1525 Char *ep;
1526 char *ptr;
1527 int rv;
1528
1529 #ifdef WINNT_NATIVE
1530 ep = Strend(cp);
1531 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */
1532 dp++;
1533 #endif /* WINNT_NATIVE */
1534
1535 ep = Strspl(cp, dp);
1536 cleanup_push(ep, xfree);
1537 ptr = short2str(ep);
1538
1539 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
1540 cleanup_until(ep);
1541 return rv;
1542 }
1543 }
1544
1545 /*
1546 * Source to a file putting the file descriptor in a safe place (> 2).
1547 */
1548 #ifndef WINNT_NATIVE
1549 static int
1550 #else
1551 int
1552 #endif /*WINNT_NATIVE*/
srcfile(const char * f,int onlyown,int flag,Char ** av)1553 srcfile(const char *f, int onlyown, int flag, Char **av)
1554 {
1555 int unit;
1556
1557 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1)
1558 return 0;
1559 cleanup_push(&unit, open_cleanup);
1560 unit = dmove(unit, -1);
1561 cleanup_ignore(&unit);
1562 cleanup_until(&unit);
1563
1564 (void) close_on_exec(unit, 1);
1565 srcunit(unit, onlyown, flag, av);
1566 return 1;
1567 }
1568
1569
1570 /*
1571 * Save the shell state, and establish new argument vector, and new input
1572 * fd.
1573 */
1574 static void
st_save(struct saved_state * st,int unit,int hflg,Char ** al,Char ** av)1575 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av)
1576 {
1577 st->insource = insource;
1578 st->SHIN = SHIN;
1579 /* Want to preserve the meaning of "source file >output".
1580 * Save old descriptors, move new 0,1,2 to safe places and assign
1581 * them to SH* and let process() redo 0,1,2 from them.
1582 *
1583 * The macro returns true if d1 and d2 are good and they point to
1584 * different things. If you don't avoid saving duplicate
1585 * descriptors, you really limit the depth of "source" recursion
1586 * you can do because of all the open file descriptors. -IAN!
1587 */
1588 #define NEED_SAVE_FD(d1,d2) \
1589 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
1590 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) )
1591
1592 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */
1593 if (didfds) {
1594 struct stat s1, s2;
1595 if (NEED_SAVE_FD(0,OLDSTD)) {
1596 st->OLDSTD = OLDSTD;
1597 OLDSTD = dmove(0, -1);
1598 (void)close_on_exec(OLDSTD, 1);
1599 }
1600 if (NEED_SAVE_FD(1,SHOUT)) {
1601 st->SHOUT = SHOUT;
1602 SHOUT = dmove(1, -1);
1603 (void)close_on_exec(SHOUT, 1);
1604 }
1605 if (NEED_SAVE_FD(2,SHDIAG)) {
1606 st->SHDIAG = SHDIAG;
1607 SHDIAG = dmove(2, -1);
1608 (void)close_on_exec(SHDIAG, 1);
1609 }
1610 donefds();
1611 }
1612
1613 st->intty = intty;
1614 st->whyles = whyles;
1615 st->gointr = gointr;
1616 st->arginp = arginp;
1617 st->evalp = evalp;
1618 st->evalvec = evalvec;
1619 st->alvecp = alvecp;
1620 st->alvec = alvec;
1621 st->onelflg = onelflg;
1622 st->enterhist = enterhist;
1623 st->justpr = justpr;
1624 if (hflg)
1625 st->HIST = HIST;
1626 else
1627 st->HIST = '\0';
1628 st->cantell = cantell;
1629 cpybin(st->B, B);
1630
1631 /*
1632 * we can now pass arguments to source.
1633 * For compatibility we do that only if arguments were really
1634 * passed, otherwise we keep the old, global $argv like before.
1635 */
1636 if (av != NULL && *av != NULL) {
1637 struct varent *vp;
1638 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL)
1639 st->argv = saveblk(vp->vec);
1640 else
1641 st->argv = NULL;
1642 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
1643 }
1644 else
1645 st->argv = NULL;
1646 st->av = av;
1647
1648 SHIN = unit; /* Do this first */
1649
1650 /* Establish new input arena */
1651 {
1652 fbuf = NULL;
1653 fseekp = feobp = fblocks = 0;
1654 settell();
1655 }
1656
1657 arginp = 0;
1658 onelflg = 0;
1659 intty = isatty(SHIN);
1660 whyles = 0;
1661 gointr = 0;
1662 evalvec = 0;
1663 evalp = 0;
1664 alvec = al;
1665 alvecp = 0;
1666 enterhist = hflg;
1667 if (enterhist)
1668 HIST = '\0';
1669 insource = 1;
1670 }
1671
1672
1673 /*
1674 * Restore the shell to a saved state
1675 */
1676 static void
st_restore(void * xst)1677 st_restore(void *xst)
1678 {
1679 struct saved_state *st;
1680
1681 st = xst;
1682 if (st->SHIN == -1)
1683 return;
1684
1685 /* Reset input arena */
1686 {
1687 int i;
1688 Char** nfbuf = fbuf;
1689 int nfblocks = fblocks;
1690
1691 fblocks = 0;
1692 fbuf = NULL;
1693 for (i = 0; i < nfblocks; i++)
1694 xfree(nfbuf[i]);
1695 xfree(nfbuf);
1696 }
1697 cpybin(B, st->B);
1698
1699 xclose(SHIN);
1700
1701 insource = st->insource;
1702 SHIN = st->SHIN;
1703 if (st->OLDSTD != -1)
1704 xclose(OLDSTD), OLDSTD = st->OLDSTD;
1705 if (st->SHOUT != -1)
1706 xclose(SHOUT), SHOUT = st->SHOUT;
1707 if (st->SHDIAG != -1)
1708 xclose(SHDIAG), SHDIAG = st->SHDIAG;
1709 arginp = st->arginp;
1710 onelflg = st->onelflg;
1711 evalp = st->evalp;
1712 evalvec = st->evalvec;
1713 alvecp = st->alvecp;
1714 alvec = st->alvec;
1715 intty = st->intty;
1716 whyles = st->whyles;
1717 gointr = st->gointr;
1718 if (st->HIST != '\0')
1719 HIST = st->HIST;
1720 enterhist = st->enterhist;
1721 cantell = st->cantell;
1722 justpr = st->justpr;
1723
1724 if (st->argv != NULL)
1725 setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
1726 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL)
1727 unsetv(STRargv);
1728 }
1729
1730 /*
1731 * Source to a unit. If onlyown it must be our file or our group or
1732 * we don't chance it. This occurs on ".cshrc"s and the like.
1733 */
1734 static void
srcunit(int unit,int onlyown,int hflg,Char ** av)1735 srcunit(int unit, int onlyown, int hflg, Char **av)
1736 {
1737 struct saved_state st;
1738
1739 st.SHIN = -1; /* st_restore checks this */
1740
1741 if (unit < 0)
1742 return;
1743
1744 if (onlyown) {
1745 struct stat stb;
1746
1747 if (fstat(unit, &stb) < 0) {
1748 xclose(unit);
1749 return;
1750 }
1751 }
1752
1753 /* Does nothing before st_save() because st.SHIN == -1 */
1754 cleanup_push(&st, st_restore);
1755 if (setintr) {
1756 pintr_disabled++;
1757 cleanup_push(&pintr_disabled, disabled_cleanup);
1758 }
1759
1760 /* Save the current state and move us to a new state */
1761 st_save(&st, unit, hflg, NULL, av);
1762
1763 /*
1764 * Now if we are allowing commands to be interrupted, we let ourselves be
1765 * interrupted.
1766 */
1767 if (setintr) {
1768 cleanup_until(&pintr_disabled);
1769 pintr_disabled++;
1770 cleanup_push(&pintr_disabled, disabled_cleanup);
1771 }
1772
1773 process(0); /* 0 -> blow away on errors */
1774
1775 /* Restore the old state */
1776 cleanup_until(&st);
1777 }
1778
1779
1780 /*ARGSUSED*/
1781 void
goodbye(Char ** v,struct command * c)1782 goodbye(Char **v, struct command *c)
1783 {
1784 USE(v);
1785 USE(c);
1786 record();
1787
1788 if (loginsh) {
1789 size_t omark;
1790 sigset_t set;
1791
1792 sigemptyset(&set);
1793 signal(SIGQUIT, SIG_IGN);
1794 sigaddset(&set, SIGQUIT);
1795 sigprocmask(SIG_UNBLOCK, &set, NULL);
1796 signal(SIGINT, SIG_IGN);
1797 sigaddset(&set, SIGINT);
1798 signal(SIGTERM, SIG_IGN);
1799 sigaddset(&set, SIGTERM);
1800 signal(SIGHUP, SIG_IGN);
1801 sigaddset(&set, SIGHUP);
1802 sigprocmask(SIG_UNBLOCK, &set, NULL);
1803 phup_disabled = 1;
1804 setintr = 0; /* No interrupts after "logout" */
1805 /* Trap errors inside .logout */
1806 omark = cleanup_push_mark();
1807 if (setexit() == 0) {
1808 if (!(adrof(STRlogout)))
1809 setcopy(STRlogout, STRnormal, VAR_READWRITE);
1810 #ifdef _PATH_DOTLOGOUT
1811 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1812 #endif
1813 if (adrof(STRhome))
1814 (void) srccat(varval(STRhome), STRsldtlogout);
1815 #ifdef TESLA
1816 do_logout = 1;
1817 #endif /* TESLA */
1818 }
1819 cleanup_pop_mark(omark);
1820 }
1821 exitstat();
1822 }
1823
1824 void
exitstat(void)1825 exitstat(void)
1826 {
1827 #ifdef PROF
1828 _mcleanup();
1829 #endif
1830 /*
1831 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1832 * directly because we poke child here. Otherwise we might continue
1833 * unwarrantedly (sic).
1834 */
1835 child = 1;
1836
1837 xexit(getstatus());
1838 }
1839
1840 /*
1841 * in the event of a HUP we want to save the history
1842 */
1843 void
phup(void)1844 phup(void)
1845 {
1846 static int again = 0;
1847 if (again++)
1848 return;
1849
1850 if (loginsh) {
1851 setcopy(STRlogout, STRhangup, VAR_READWRITE);
1852 #ifdef _PATH_DOTLOGOUT
1853 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1854 #endif
1855 if (adrof(STRhome))
1856 (void) srccat(varval(STRhome), STRsldtlogout);
1857 }
1858
1859 record();
1860
1861 #ifdef POSIXJOBS
1862 /*
1863 * We kill the last foreground process group. It then becomes
1864 * responsible to propagate the SIGHUP to its progeny.
1865 */
1866 {
1867 struct process *pp, *np;
1868
1869 for (pp = proclist.p_next; pp; pp = pp->p_next) {
1870 np = pp;
1871 /*
1872 * Find if this job is in the foreground. It could be that
1873 * the process leader has exited and the foreground flag
1874 * is cleared for it.
1875 */
1876 do
1877 /*
1878 * If a process is in the foreground we try to kill
1879 * it's process group. If we succeed, then the
1880 * whole job is gone. Otherwise we keep going...
1881 * But avoid sending HUP to the shell again.
1882 */
1883 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1884 np->p_flags &= ~PHUP;
1885 if (killpg(np->p_jobid, SIGHUP) != -1) {
1886 /* In case the job was suspended... */
1887 #ifdef SIGCONT
1888 (void) killpg(np->p_jobid, SIGCONT);
1889 #endif
1890 break;
1891 }
1892 }
1893 while ((np = np->p_friends) != pp);
1894 }
1895 }
1896 #endif /* POSIXJOBS */
1897
1898 xexit(SIGHUP);
1899 }
1900
1901 static Char *jobargv[2] = {STRjobs, 0};
1902
1903 /*
1904 * Catch an interrupt, e.g. during lexical input.
1905 * If we are an interactive shell, we reset the interrupt catch
1906 * immediately. In any case we drain the shell output,
1907 * and finally go through the normal error mechanism, which
1908 * gets a chance to make the shell go away.
1909 */
1910 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1911
1912 void
pintr(void)1913 pintr(void)
1914 {
1915 just_signaled = 1;
1916 pintr1(1);
1917 }
1918
1919 void
pintr1(int wantnl)1920 pintr1(int wantnl)
1921 {
1922 if (setintr) {
1923 if (pjobs) {
1924 pjobs = 0;
1925 xputchar('\n');
1926 dojobs(jobargv, NULL);
1927 stderror(ERR_NAME | ERR_INTR);
1928 }
1929 }
1930 /* MH - handle interrupted completions specially */
1931 {
1932 if (InsideCompletion)
1933 stderror(ERR_SILENT);
1934 }
1935 /* JV - Make sure we shut off inputl */
1936 {
1937 (void) Cookedmode();
1938 GettingInput = 0;
1939 if (evalvec)
1940 doneinp = 1;
1941 }
1942 drainoline();
1943 #ifdef HAVE_GETPWENT
1944 (void) endpwent();
1945 #endif
1946
1947 /*
1948 * If we have an active "onintr" then we search for the label. Note that if
1949 * one does "onintr -" then we shan't be interruptible so we needn't worry
1950 * about that here.
1951 */
1952 if (gointr) {
1953 gotolab(gointr);
1954 reset();
1955 }
1956 else if (intty && wantnl) {
1957 if (editing) {
1958 /*
1959 * If we are editing a multi-line input command, and move to
1960 * the beginning of the line, we don't want to trash it when
1961 * we hit ^C
1962 */
1963 PastBottom();
1964 ClearLines();
1965 ClearDisp();
1966 }
1967 else {
1968 /* xputchar('\n'); *//* Some like this, others don't */
1969 (void) putraw('\r');
1970 (void) putraw('\n');
1971 }
1972 }
1973 stderror(ERR_SILENT);
1974 }
1975
1976 /*
1977 * Process is the main driving routine for the shell.
1978 * It runs all command processing, except for those within { ... }
1979 * in expressions (which is run by a routine evalav in sh.exp.c which
1980 * is a stripped down process), and `...` evaluation which is run
1981 * also by a subset of this code in sh.glob.c in the routine backeval.
1982 *
1983 * The code here is a little strange because part of it is interruptible
1984 * and hence freeing of structures appears to occur when none is necessary
1985 * if this is ignored.
1986 *
1987 * Note that if catch is not set then we will unwind on any error.
1988 * If an end-of-file occurs, we return.
1989 */
1990 void
process(int catch)1991 process(int catch)
1992 {
1993 jmp_buf_t osetexit;
1994 /* PWP: This might get nuked by longjmp so don't make it a register var */
1995 size_t omark;
1996 volatile int didexitset = 0;
1997
1998 getexit(osetexit);
1999 omark = cleanup_push_mark();
2000 for (;;) {
2001 struct command *t;
2002 int hadhist, old_pintr_disabled;
2003
2004 (void)setexit();
2005 if (didexitset == 0) {
2006 exitset++;
2007 didexitset++;
2008 }
2009 pendjob();
2010
2011 justpr = enterhist; /* execute if not entering history */
2012
2013 if (haderr) {
2014 if (!catch) {
2015 /* unwind */
2016 doneinp = 0;
2017 cleanup_pop_mark(omark);
2018 resexit(osetexit);
2019 reset();
2020 }
2021 haderr = 0;
2022 /*
2023 * Every error is eventually caught here or the shell dies. It is
2024 * at this point that we clean up any left-over open files, by
2025 * closing all but a fixed number of pre-defined files. Thus
2026 * routines don't have to worry about leaving files open due to
2027 * deeper errors... they will get closed here.
2028 */
2029 closem();
2030 continue;
2031 }
2032 if (doneinp) {
2033 doneinp = 0;
2034 break;
2035 }
2036 if (chkstop)
2037 chkstop--;
2038 if (neednote)
2039 pnote();
2040 if (intty && prompt && evalvec == 0) {
2041 just_signaled = 0;
2042 mailchk();
2043 /*
2044 * Watch for logins/logouts. Next is scheduled commands stored
2045 * previously using "sched." Then execute periodic commands.
2046 * Following that, the prompt precmd is run.
2047 */
2048 #ifndef HAVENOUTMP
2049 watch_login(0);
2050 #endif /* !HAVENOUTMP */
2051 sched_run();
2052 period_cmd();
2053 precmd();
2054 /*
2055 * If we are at the end of the input buffer then we are going to
2056 * read fresh stuff. Otherwise, we are rereading input and don't
2057 * need or want to prompt.
2058 */
2059 if (fseekp == feobp && aret == TCSH_F_SEEK)
2060 printprompt(0, NULL);
2061 flush();
2062 setalarm(1);
2063 }
2064 if (seterr) {
2065 xfree(seterr);
2066 seterr = NULL;
2067 }
2068
2069 /*
2070 * Interruptible during interactive reads
2071 */
2072 if (setintr)
2073 pintr_push_enable(&old_pintr_disabled);
2074 freelex(¶ml);
2075 hadhist = lex(¶ml);
2076 if (setintr)
2077 cleanup_until(&old_pintr_disabled);
2078 cleanup_push(¶ml, lex_cleanup);
2079
2080 /*
2081 * Echo not only on VERBOSE, but also with history expansion. If there
2082 * is a lexical error then we forego history echo.
2083 * Do not echo if we're only entering history (source -h).
2084 */
2085 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) ||
2086 (!enterhist && adrof(STRverbose)))
2087 {
2088 int odidfds = didfds;
2089 haderr = 1;
2090 didfds = 0;
2091 prlex(¶ml);
2092 flush();
2093 haderr = 0;
2094 didfds = odidfds;
2095 }
2096 (void) alarm(0); /* Autologout OFF */
2097 alrmcatch_disabled = 1;
2098
2099 /*
2100 * Save input text on the history list if reading in old history, or it
2101 * is from the terminal at the top level and not in a loop.
2102 *
2103 * PWP: entry of items in the history list while in a while loop is done
2104 * elsewhere...
2105 */
2106 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun))
2107 savehist(¶ml, enterhist > 1);
2108
2109 if (Expand && seterr)
2110 Expand = 0;
2111
2112 /*
2113 * Print lexical error messages, except when sourcing history lists.
2114 */
2115 if (!enterhist && seterr)
2116 stderror(ERR_OLD);
2117
2118 /*
2119 * If had a history command :p modifier then this is as far as we
2120 * should go
2121 */
2122 if (justpr)
2123 goto cmd_done;
2124
2125 /*
2126 * If had a tellwhat from twenex() then do
2127 */
2128 if (tellwhat) {
2129 (void) tellmewhat(¶ml, NULL);
2130 goto cmd_done;
2131 }
2132
2133 alias(¶ml);
2134
2135 #ifdef BSDJOBS
2136 /*
2137 * If we are interactive, try to continue jobs that we have stopped
2138 */
2139 if (prompt)
2140 continue_jobs(¶ml);
2141 #endif /* BSDJOBS */
2142
2143 /*
2144 * Check to see if the user typed "rm * .o" or something
2145 */
2146 if (prompt)
2147 rmstar(¶ml);
2148 /*
2149 * Parse the words of the input into a parse tree.
2150 */
2151 t = syntax(paraml.next, ¶ml, 0);
2152 /*
2153 * We cannot cleanup push here, because cd /blah; echo foo
2154 * would rewind t on the chdir error, and free the rest of the command
2155 */
2156 if (seterr) {
2157 freesyn(t);
2158 stderror(ERR_OLD);
2159 }
2160
2161 postcmd();
2162 /*
2163 * Execute the parse tree From: Michael Schroeder
2164 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2165 */
2166 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
2167 freesyn(t);
2168
2169 /*
2170 * Made it!
2171 */
2172 #ifdef SIG_WINDOW
2173 if (windowchg || (catch && intty && !whyles && !tellwhat)) {
2174 (void) check_window_size(0); /* for window systems */
2175 }
2176 #endif /* SIG_WINDOW */
2177 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB);
2178 cmd_done:
2179 if (cleanup_reset())
2180 cleanup_until(¶ml);
2181 else
2182 haderr = 1;
2183 }
2184 cleanup_pop_mark(omark);
2185 resexit(osetexit);
2186 exitset--;
2187 handle_pending_signals();
2188 }
2189
2190 /*ARGSUSED*/
2191 void
dosource(Char ** t,struct command * c)2192 dosource(Char **t, struct command *c)
2193 {
2194 Char *f;
2195 int hflg = 0;
2196 char *file;
2197
2198 USE(c);
2199 t++;
2200 if (*t && eq(*t, STRmh)) {
2201 if (*++t == NULL)
2202 stderror(ERR_NAME | ERR_HFLAG);
2203 hflg++;
2204 }
2205 else if (*t && eq(*t, STRmm)) {
2206 if (*++t == NULL)
2207 stderror(ERR_NAME | ERR_MFLAG);
2208 hflg = 2;
2209 }
2210
2211 f = globone(*t++, G_ERROR);
2212 file = strsave(short2str(f));
2213 cleanup_push(file, xfree);
2214 xfree(f);
2215 t = glob_all_or_error(t);
2216 cleanup_push(t, blk_cleanup);
2217 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet))
2218 stderror(ERR_SYSTEM, file, strerror(errno));
2219 cleanup_until(file);
2220 }
2221
2222 /*
2223 * Check for mail.
2224 * If we are a login shell, then we don't want to tell
2225 * about any mail file unless its been modified
2226 * after the time we started.
2227 * This prevents us from telling the user things he already
2228 * knows, since the login program insists on saying
2229 * "You have mail."
2230 */
2231
2232 /*
2233 * The AMS version.
2234 * This version checks if the file is a directory, and if so,
2235 * tells you the number of files in it, otherwise do the old thang.
2236 * The magic "+1" in the time calculation is to compensate for
2237 * an AFS bug where directory mtimes are set to 1 second in
2238 * the future.
2239 */
2240
2241 static void
mailchk(void)2242 mailchk(void)
2243 {
2244 struct varent *v;
2245 Char **vp;
2246 time_t t;
2247 int intvl, cnt;
2248 struct stat stb;
2249 int new;
2250
2251 v = adrof(STRmail);
2252 if (v == NULL || v->vec == NULL)
2253 return;
2254 (void) time(&t);
2255 vp = v->vec;
2256 cnt = blklen(vp);
2257 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
2258 if (intvl < 1)
2259 intvl = 1;
2260 if (chktim + intvl > t)
2261 return;
2262 for (; *vp; vp++) {
2263 char *filename = short2str(*vp);
2264 char *mboxdir = filename;
2265
2266 if (stat(filename, &stb) < 0)
2267 continue;
2268 #if defined(BSDTIMES) || defined(_SEQUENT_)
2269 new = stb.st_mtime > time0.tv_sec;
2270 #else
2271 new = stb.st_mtime > seconds0;
2272 #endif
2273 if (S_ISDIR(stb.st_mode)) {
2274 DIR *mailbox;
2275 int mailcount = 0;
2276 char *tempfilename;
2277 struct stat stc;
2278
2279 tempfilename = xasprintf("%s/new", filename);
2280
2281 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2282 /*
2283 * "filename/new" exists and is a directory; you are
2284 * using Qmail.
2285 */
2286 stb = stc;
2287 #if defined(BSDTIMES) || defined(_SEQUENT_)
2288 new = stb.st_mtime > time0.tv_sec;
2289 #else
2290 new = stb.st_mtime > seconds0;
2291 #endif
2292 mboxdir = tempfilename;
2293 }
2294
2295 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) {
2296 xfree(tempfilename);
2297 continue;
2298 }
2299
2300 mailbox = opendir(mboxdir);
2301 xfree(tempfilename);
2302 if (mailbox == NULL)
2303 continue;
2304
2305 /* skip . and .. */
2306 if (!readdir(mailbox) || !readdir(mailbox)) {
2307 (void)closedir(mailbox);
2308 continue;
2309 }
2310
2311 while (readdir(mailbox))
2312 mailcount++;
2313
2314 (void)closedir(mailbox);
2315 if (mailcount == 0)
2316 continue;
2317
2318 if (cnt == 1)
2319 xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2320 mailcount);
2321 else
2322 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2323 mailcount, filename);
2324 }
2325 else {
2326 char *type;
2327
2328 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime ||
2329 (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
2330 (loginsh && !new))
2331 continue;
2332 type = strsave(new ? CGETS(11, 6, "new ") : "");
2333 cleanup_push(type, xfree);
2334 if (cnt == 1)
2335 xprintf(CGETS(11, 5, "You have %smail.\n"), type);
2336 else
2337 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
2338 cleanup_until(type);
2339 }
2340 }
2341 chktim = t;
2342 }
2343
2344 /*
2345 * Extract a home directory from the password file
2346 * The argument points to a buffer where the name of the
2347 * user whose home directory is sought is currently.
2348 * We return home directory of the user, or NULL.
2349 */
2350 Char *
gethdir(const Char * home)2351 gethdir(const Char *home)
2352 {
2353 Char *h;
2354
2355 /*
2356 * Is it us?
2357 */
2358 if (*home == '\0') {
2359 if ((h = varval(STRhome)) != STRNULL)
2360 return Strsave(h);
2361 else
2362 return NULL;
2363 }
2364
2365 /*
2366 * Look in the cache
2367 */
2368 if ((h = gettilde(home)) == NULL)
2369 return NULL;
2370 else
2371 return Strsave(h);
2372 }
2373
2374 /*
2375 * Move the initial descriptors to their eventual
2376 * resting places, closing all other units.
2377 */
2378 void
initdesc(void)2379 initdesc(void)
2380 {
2381 #ifdef NLS_BUGS
2382 #ifdef NLS_CATALOGS
2383 nlsclose();
2384 #endif /* NLS_CATALOGS */
2385 #endif /* NLS_BUGS */
2386
2387
2388 didfds = 0; /* 0, 1, 2 aren't set up */
2389 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2390 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2391 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2392 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2393 #ifndef CLOSE_ON_EXEC
2394 didcch = 0; /* Havent closed for child */
2395 #endif /* CLOSE_ON_EXEC */
2396 if (SHDIAG >= 0)
2397 isdiagatty = isatty(SHDIAG);
2398 else
2399 isdiagatty = 0;
2400 if (SHDIAG >= 0)
2401 isoutatty = isatty(SHOUT);
2402 else
2403 isoutatty = 0;
2404 #ifdef NLS_BUGS
2405 #ifdef NLS_CATALOGS
2406 nlsinit();
2407 #endif /* NLS_CATALOGS */
2408 #endif /* NLS_BUGS */
2409 }
2410
2411
2412 void
2413 #ifdef PROF
done(int i)2414 done(int i)
2415 #else
2416 xexit(int i)
2417 #endif
2418 {
2419 #ifdef TESLA
2420 if (loginsh && do_logout) {
2421 /* this is to send hangup signal to the develcon */
2422 /* we toggle DTR. clear dtr - sleep 1 - set dtr */
2423 /* ioctl will return ENOTTY for pty's but we ignore it */
2424 /* exitstat will run after disconnect */
2425 /* we sleep for 2 seconds to let things happen in */
2426 /* .logout and rechist() */
2427 #ifdef TIOCCDTR
2428 (void) sleep(2);
2429 (void) ioctl(FSHTTY, TIOCCDTR, NULL);
2430 (void) sleep(1);
2431 (void) ioctl(FSHTTY, TIOCSDTR, NULL);
2432 #endif /* TIOCCDTR */
2433 }
2434 #endif /* TESLA */
2435
2436 {
2437 struct process *pp, *np;
2438 pid_t mypid = getpid();
2439 /* Kill all processes marked for hup'ing */
2440 for (pp = proclist.p_next; pp; pp = pp->p_next) {
2441 np = pp;
2442 do
2443 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp &&
2444 np->p_parentid == mypid) {
2445 if (killpg(np->p_jobid, SIGHUP) != -1) {
2446 /* In case the job was suspended... */
2447 #ifdef SIGCONT
2448 (void) killpg(np->p_jobid, SIGCONT);
2449 #endif
2450 break;
2451 }
2452 }
2453 while ((np = np->p_friends) != pp);
2454 }
2455 }
2456 untty();
2457 #ifdef NLS_CATALOGS
2458 /*
2459 * We need to call catclose, because SVR4 leaves symlinks behind otherwise
2460 * in the catalog directories. We cannot close on a vforked() child,
2461 * because messages will stop working on the parent too.
2462 */
2463 if (child == 0)
2464 nlsclose();
2465 #endif /* NLS_CATALOGS */
2466 #ifdef WINNT_NATIVE
2467 nt_cleanup();
2468 #endif /* WINNT_NATIVE */
2469 _exit(i);
2470 }
2471
2472 #ifndef _PATH_DEFPATH
2473 static Char **
defaultpath(void)2474 defaultpath(void)
2475 {
2476 char *ptr;
2477 Char **blk, **blkp;
2478 struct stat stb;
2479
2480 blkp = blk = xmalloc(sizeof(Char *) * 10);
2481
2482 #ifndef NODOT
2483 # ifndef DOTLAST
2484 *blkp++ = Strsave(STRdot);
2485 # endif
2486 #endif
2487
2488 #define DIRAPPEND(a) \
2489 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2490 *blkp++ = SAVE(ptr)
2491
2492 #ifdef _PATH_LOCAL
2493 DIRAPPEND(_PATH_LOCAL);
2494 #endif
2495
2496 #ifdef _PATH_USRUCB
2497 DIRAPPEND(_PATH_USRUCB);
2498 #endif
2499
2500 #ifdef _PATH_USRBSD
2501 DIRAPPEND(_PATH_USRBSD);
2502 #endif
2503
2504 #ifdef _PATH_BIN
2505 DIRAPPEND(_PATH_BIN);
2506 #endif
2507
2508 #ifdef _PATH_USRBIN
2509 DIRAPPEND(_PATH_USRBIN);
2510 #endif
2511
2512 #undef DIRAPPEND
2513
2514 #ifndef NODOT
2515 # ifdef DOTLAST
2516 *blkp++ = Strsave(STRdot);
2517 # endif
2518 #endif
2519 *blkp = NULL;
2520 return (blk);
2521 }
2522 #endif
2523
2524 static void
record(void)2525 record(void)
2526 {
2527 static int again = 0;
2528 int ophup_disabled;
2529
2530 if (again++)
2531 return;
2532
2533 ophup_disabled = phup_disabled;
2534 phup_disabled = 1;
2535 if (!fast) {
2536 recdirs(NULL, adrof(STRsavedirs) != NULL);
2537 rechist(NULL, adrof(STRsavehist) != NULL);
2538 }
2539 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */
2540 phup_disabled = ophup_disabled;
2541 }
2542
2543 /*
2544 * Grab the tty repeatedly, and give up if we are not in the correct
2545 * tty process group.
2546 */
2547 int
grabpgrp(int fd,pid_t desired)2548 grabpgrp(int fd, pid_t desired)
2549 {
2550 struct sigaction old;
2551 pid_t pgrp;
2552 size_t i;
2553
2554 for (i = 0; i < 100; i++) {
2555 if ((pgrp = tcgetpgrp(fd)) == -1)
2556 return -1;
2557 if (pgrp == desired)
2558 return 0;
2559 (void)sigaction(SIGTTIN, NULL, &old);
2560 (void)signal(SIGTTIN, SIG_DFL);
2561 (void)kill(0, SIGTTIN);
2562 (void)sigaction(SIGTTIN, &old, NULL);
2563 }
2564 errno = EPERM;
2565 return -1;
2566 }
2567