1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.c,v 3.189 2016/09/12 16:33:54 christos Exp $ */
2 /*
3 * sh.c: Main shell routines
4 */
5 /*-
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
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.
20 *
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
31 * SUCH DAMAGE.
32 */
33 #define EXTERN /* Intern */
34 #include "sh.h"
35
36 #ifndef lint
37 char copyright[] =
38 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\
39 All rights reserved.\n";
40 #endif /* not lint */
41
42 RCSID("$tcsh: sh.c,v 3.189 2016/09/12 16:33:54 christos Exp $")
43
44 #include "tc.h"
45 #include "ed.h"
46 #include "tw.h"
47
48 extern int MapsAreInited;
49 extern int NLSMapsAreInited;
50
51 /*
52 * C Shell
53 *
54 * Bill Joy, UC Berkeley, California, USA
55 * October 1978, May 1980
56 *
57 * Jim Kulp, IIASA, Laxenburg, Austria
58 * April 1980
59 *
60 * Filename recognition added:
61 * Ken Greer, Ind. Consultant, Palo Alto CA
62 * October 1983.
63 *
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.
68 *
69 * Added scheduled commands, including the "sched" command,
70 * plus the call to sched_run near the precmd et al
71 * routines.
72 * Upgraded scheduled events for running events while
73 * sitting idle at command input.
74 *
75 * Paul Placeway, Ohio State
76 * added stuff for running with twenex/inputl 9 Oct 1984.
77 *
78 * ported to Apple Unix (TM) (OREO) 26 -- 29 Jun 1987
79 */
80
81 jmp_buf_t reslab IZERO_STRUCT;
82 struct wordent paraml IZERO_STRUCT;
83
84 static const char tcshstr[] = "tcsh";
85
86 struct sigaction parintr; /* Parents interrupt catch */
87 struct sigaction parterm; /* Parents terminate catch */
88
89 #ifdef TESLA
90 int do_logout = 0;
91 #endif /* TESLA */
92
93
94 int use_fork = 0; /* use fork() instead of vfork()? */
95
96 /*
97 * Magic pointer values. Used to specify other invalid conditions aside
98 * from null.
99 */
100 static Char INVCHAR;
101 Char *INVPTR = &INVCHAR;
102 Char **INVPPTR = &INVPTR;
103
104 static int fast = 0;
105 static int mflag = 0;
106 static int prompt = 1;
107 int enterhist = 0;
108 int tellwhat = 0;
109 time_t t_period;
110 Char *ffile = NULL;
111 int dolzero = 0;
112 int insource = 0;
113 int exitset = 0;
114 static time_t chktim; /* Time mail last checked */
115 char *progname;
116 int tcsh;
117
118 /*
119 * This preserves the input state of the shell. It is used by
120 * st_save and st_restore to manupulate shell state.
121 */
122 struct saved_state {
123 int insource;
124 int OLDSTD;
125 int SHIN;
126 int SHOUT;
127 int SHDIAG;
128 int intty;
129 struct whyle *whyles;
130 Char *gointr;
131 Char *arginp;
132 Char *evalp;
133 Char **evalvec;
134 Char *alvecp;
135 Char **alvec;
136 int onelflg;
137 int enterhist;
138 Char **argv;
139 Char **av;
140 Char HIST;
141 int cantell;
142 struct Bin B;
143 int justpr;
144 };
145
146 static int srccat (Char *, Char *);
147 #ifndef WINNT_NATIVE
148 static int srcfile (const char *, int, int, Char **);
149 #else
150 int srcfile (const char *, int, int, Char **);
151 #endif /*WINNT_NATIVE*/
152 static void srcunit (int, int, int, Char **);
153 static void mailchk (void);
154 #ifndef _PATH_DEFPATH
155 static Char **defaultpath (void);
156 #endif
157 static void record (void);
158 static void st_save (struct saved_state *, int, int,
159 Char **, Char **);
160 static void st_restore (void *);
161
162 int main (int, char **);
163
164 #ifndef LOCALEDIR
165 #define LOCALEDIR "/usr/share/locale"
166 #endif
167
168 #ifdef NLS_CATALOGS
169 static void
add_localedir_to_nlspath(const char * path)170 add_localedir_to_nlspath(const char *path)
171 {
172 static const char msgs_LOC[] = "/%L/LC_MESSAGES/%N.cat";
173 static const char msgs_lang[] = "/%l/LC_MESSAGES/%N.cat";
174 char *old;
175 char *new, *new_p;
176 size_t len;
177 int add_LOC = 1;
178 int add_lang = 1;
179 char trypath[MAXPATHLEN];
180 struct stat st;
181
182 if (path == NULL)
183 return;
184
185 (void) xsnprintf(trypath, sizeof(trypath), "%s/en/LC_MESSAGES/tcsh.cat",
186 path);
187 if (stat(trypath, &st) == -1)
188 return;
189
190 if ((old = getenv("NLSPATH")) != NULL)
191 len = strlen(old) + 1; /* don't forget the colon. */
192 else
193 len = 0;
194
195 len += 2 * strlen(path) +
196 sizeof(msgs_LOC) + sizeof(msgs_lang); /* includes the extra colon */
197
198 new = new_p = xcalloc(len, 1);
199
200 if (old != NULL) {
201 size_t pathlen = strlen(path);
202 char *old_p;
203
204 (void) xsnprintf(new_p, len, "%s", old);
205 new_p += strlen(new_p);
206 len -= new_p - new;
207
208 /* Check if the paths we try to add are already present in NLSPATH.
209 If so, note it by setting the appropriate flag to 0. */
210 for (old_p = old; old_p; old_p = strchr(old_p, ':'),
211 old_p = old_p ? old_p + 1 : NULL) {
212 if (strncmp(old_p, path, pathlen) != 0)
213 continue;
214 if (strncmp(old_p + pathlen, msgs_LOC, sizeof(msgs_LOC) - 1) == 0)
215 add_LOC = 0;
216 else if (strncmp(old_p + pathlen, msgs_lang,
217 sizeof(msgs_lang) - 1) == 0)
218 add_lang = 0;
219 }
220 }
221
222 /* Add the message catalog paths not already present to NLSPATH. */
223 if (add_LOC || add_lang)
224 (void) xsnprintf(new_p, len, "%s%s%s%s%s%s",
225 old ? ":" : "",
226 add_LOC ? path : "", add_LOC ? msgs_LOC : "",
227 add_LOC && add_lang ? ":" : "",
228 add_lang ? path : "", add_lang ? msgs_lang : "");
229
230 tsetenv(STRNLSPATH, str2short(new));
231 free(new);
232 }
233 #endif
234
235 int
main(int argc,char ** argv)236 main(int argc, char **argv)
237 {
238 int batch = 0;
239 volatile int nexececho = 0;
240 int nofile = 0;
241 volatile int nverbose = 0;
242 volatile int rdirs = 0;
243 int quitit = 0;
244 Char *cp;
245 #ifdef AUTOLOGOUT
246 Char *cp2;
247 #endif
248 char *tcp, *ttyn;
249 int f, reenter;
250 char **tempv;
251 const char *targinp = NULL;
252 int osetintr;
253 struct sigaction oparintr;
254
255 #ifdef WINNT_NATIVE
256 nt_init();
257 #endif /* WINNT_NATIVE */
258
259 (void)memset(&reslab, 0, sizeof(reslab));
260 #if defined(NLS_CATALOGS) && defined(LC_MESSAGES)
261 (void) setlocale(LC_MESSAGES, "");
262 #endif /* NLS_CATALOGS && LC_MESSAGES */
263
264 #ifdef NLS
265 # ifdef LC_CTYPE
266 (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
267 # endif /* LC_CTYPE */
268 #endif /* NLS */
269
270 STR_environ = blk2short(environ);
271 environ = short2blk(STR_environ); /* So that we can free it */
272
273 #ifdef NLS_CATALOGS
274 add_localedir_to_nlspath(LOCALEDIR);
275 #endif
276
277 nlsinit();
278 initlex(¶ml);
279
280 #ifdef MALLOC_TRACE
281 mal_setstatsfile(fdopen(dmove(xopen("/tmp/tcsh.trace",
282 O_WRONLY|O_CREAT|O_LARGEFILE, 0666), 25), "w"));
283 mal_trace(1);
284 #endif /* MALLOC_TRACE */
285
286 #if !(defined(BSDTIMES) || defined(_SEQUENT_)) && defined(POSIX)
287 # ifdef _SC_CLK_TCK
288 clk_tck = (clock_t) sysconf(_SC_CLK_TCK);
289 # else /* ! _SC_CLK_TCK */
290 # ifdef CLK_TCK
291 clk_tck = CLK_TCK;
292 # else /* !CLK_TCK */
293 clk_tck = HZ;
294 # endif /* CLK_TCK */
295 # endif /* _SC_CLK_TCK */
296 #endif /* !BSDTIMES && POSIX */
297
298 settimes(); /* Immed. estab. timing base */
299 #ifdef TESLA
300 do_logout = 0;
301 #endif /* TESLA */
302
303 /*
304 * Make sure we have 0, 1, 2 open
305 * Otherwise `` jobs will not work... (From knaff@poly.polytechnique.fr)
306 */
307 {
308 do
309 if ((f = xopen(_PATH_DEVNULL, O_RDONLY|O_LARGEFILE)) == -1 &&
310 (f = xopen("/", O_RDONLY|O_LARGEFILE)) == -1)
311 exit(1);
312 while (f < 3);
313 xclose(f);
314 }
315
316 osinit(); /* Os dependent initialization */
317
318
319 {
320 char *t;
321
322 t = strrchr(argv[0], '/');
323 #ifdef WINNT_NATIVE
324 {
325 char *s = strrchr(argv[0], '\\');
326 if (s)
327 t = s;
328 }
329 #endif /* WINNT_NATIVE */
330 t = t ? t + 1 : argv[0];
331 if (*t == '-') t++;
332 progname = strsave((t && *t) ? t : tcshstr); /* never want a null */
333 tcsh = strncmp(progname, tcshstr, sizeof(tcshstr) - 1) == 0;
334 }
335
336 /*
337 * Initialize non constant strings
338 */
339 #ifdef _PATH_BSHELL
340 STR_BSHELL = SAVE(_PATH_BSHELL);
341 #endif
342 #ifdef _PATH_TCSHELL
343 STR_SHELLPATH = SAVE(_PATH_TCSHELL);
344 #else
345 # ifdef _PATH_CSHELL
346 STR_SHELLPATH = SAVE(_PATH_CSHELL);
347 # endif
348 #endif
349 STR_WORD_CHARS = SAVE(WORD_CHARS);
350 STR_WORD_CHARS_VI = SAVE(WORD_CHARS_VI);
351
352 HIST = '!';
353 HISTSUB = '^';
354 PRCH = tcsh ? '>' : '%'; /* to replace %# in $prompt for normal users */
355 PRCHROOT = '#'; /* likewise for root */
356 word_chars = STR_WORD_CHARS;
357 bslash_quote = 0; /* PWP: do tcsh-style backslash quoting? */
358 anyerror = 1; /* for compatibility */
359 setcopy(STRanyerror, STRNULL, VAR_READWRITE);
360
361 /* Default history size to 100 */
362 setcopy(STRhistory, str2short("100"), VAR_READWRITE);
363 sethistory(100);
364
365 tempv = argv;
366 ffile = SAVE(tempv[0]);
367 dolzero = 0;
368 if (eq(ffile, STRaout)) /* A.out's are quittable */
369 quitit = 1;
370 uid = getuid();
371 gid = getgid();
372 euid = geteuid();
373 egid = getegid();
374 /*
375 * We are a login shell if: 1. we were invoked as -<something> with
376 * optional arguments 2. or we were invoked only with the -l flag
377 */
378 loginsh = (**tempv == '-') || (argc == 2 &&
379 tempv[1][0] == '-' && tempv[1][1] == 'l' &&
380 tempv[1][2] == '\0');
381 #ifdef _VMS_POSIX
382 /* No better way to find if we are a login shell */
383 if (!loginsh) {
384 loginsh = (argc == 1 && getppid() == 1);
385 **tempv = '-'; /* Avoid giving VMS an acidic stomach */
386 }
387 #endif /* _VMS_POSIX */
388
389 if (loginsh && **tempv != '-') {
390 char *argv0;
391
392 /*
393 * Mangle the argv space
394 */
395 tempv[1][0] = '\0';
396 tempv[1][1] = '\0';
397 tempv[1] = NULL;
398 argv0 = strspl("-", *tempv);
399 *tempv = argv0;
400 argc--;
401 }
402 if (loginsh) {
403 (void) time(&chktim);
404 setNS(STRloginsh);
405 }
406
407 NoNLSRebind = getenv("NOREBIND") != NULL;
408 #ifdef NLS
409 # ifdef SETLOCALEBUG
410 dont_free = 1;
411 # endif /* SETLOCALEBUG */
412 (void) setlocale(LC_ALL, "");
413 # ifdef LC_COLLATE
414 (void) setlocale(LC_COLLATE, "");
415 # endif
416 # ifdef SETLOCALEBUG
417 dont_free = 0;
418 # endif /* SETLOCALEBUG */
419 # ifdef STRCOLLBUG
420 fix_strcoll_bug();
421 # endif /* STRCOLLBUG */
422
423 /*
424 * On solaris ISO8859-1 contains no printable characters in the upper half
425 * so we need to test only for MB_CUR_MAX == 1, otherwise for multi-byte
426 * locales we are always AsciiOnly == 0.
427 */
428 if (MB_CUR_MAX == 1) {
429 int k;
430
431 for (k = 0200; k <= 0377 && !isprint(CTL_ESC(k)); k++)
432 continue;
433 AsciiOnly = k > 0377;
434 } else
435 AsciiOnly = 0;
436 #else
437 AsciiOnly = getenv("LANG") == NULL && getenv("LC_CTYPE") == NULL;
438 #endif /* NLS */
439 if (MapsAreInited && !NLSMapsAreInited)
440 ed_InitNLSMaps();
441 ResetArrowKeys();
442
443 /*
444 * Initialize for periodic command intervals. Also, initialize the dummy
445 * tty list for login-watch.
446 */
447 (void) time(&t_period);
448 #ifndef HAVENOUTMP
449 initwatch();
450 #endif /* !HAVENOUTMP */
451
452 #if defined(alliant)
453 /*
454 * From: Jim Pace <jdp@research.att.com>
455 * tcsh does not work properly on the alliants through an rlogin session.
456 * The shell generally hangs. Also, reference to the controlling terminal
457 * does not work ( ie: echo foo > /dev/tty ).
458 *
459 * A security feature was added to rlogind affecting FX/80's Concentrix
460 * from revision 5.5.xx upwards (through 5.7 where this fix was implemented)
461 * This security change also affects the FX/2800 series.
462 * The security change to rlogind requires the process group of an rlogin
463 * session become disassociated with the tty in rlogind.
464 *
465 * The changes needed are:
466 * 1. set the process group
467 * 2. reenable the control terminal
468 */
469 if (loginsh && isatty(SHIN)) {
470 ttyn = ttyname(SHIN);
471 xclose(SHIN);
472 SHIN = xopen(ttyn, O_RDWR|O_LARGEFILE);
473 shpgrp = getpid();
474 (void) ioctl (SHIN, TIOCSPGRP, (ioctl_t) &shpgrp);
475 (void) setpgid(0, shpgrp);
476 }
477 #endif /* alliant */
478
479 /*
480 * Move the descriptors to safe places. The variable didfds is 0 while we
481 * have only FSH* to work with. When didfds is true, we have 0,1,2 and
482 * prefer to use these.
483 */
484 initdesc();
485
486 cdtohome = 1;
487 setv(STRcdtohome, SAVE(""), VAR_READWRITE);
488
489 /*
490 * Get and set the tty now
491 */
492 if ((ttyn = ttyname(SHIN)) != NULL) {
493 /*
494 * Could use rindex to get rid of other possible path components, but
495 * hpux preserves the subdirectory /pty/ when storing the tty name in
496 * utmp, so we keep it too.
497 */
498 if (strncmp(ttyn, "/dev/", 5) == 0)
499 setv(STRtty, cp = SAVE(ttyn + 5), VAR_READWRITE);
500 else
501 setv(STRtty, cp = SAVE(ttyn), VAR_READWRITE);
502 }
503 else
504 setv(STRtty, cp = SAVE(""), VAR_READWRITE);
505
506 /*
507 * Initialize the shell variables. ARGV and PROMPT are initialized later.
508 * STATUS is also munged in several places. CHILD is munged when
509 * forking/waiting
510 */
511
512 /*
513 * 7-10-87 Paul Placeway autologout should be set ONLY on login shells and
514 * on shells running as root. Out of these, autologout should NOT be set
515 * for any psudo-terminals (this catches most window systems) and not for
516 * any terminal running X windows.
517 *
518 * At Ohio State, we have had problems with a user having his X session
519 * drop out from under him (on a Sun) because the shell in his master
520 * xterm timed out and exited.
521 *
522 * Really, this should be done with a program external to the shell, that
523 * watches for no activity (and NO running programs, such as dump) on a
524 * terminal for a long peroid of time, and then SIGHUPS the shell on that
525 * terminal.
526 *
527 * bugfix by Rich Salz <rsalz@PINEAPPLE.BBN.COM>: For root rsh things
528 * allways first check to see if loginsh or really root, then do things
529 * with ttyname()
530 *
531 * Also by Jean-Francois Lamy <lamy%ai.toronto.edu@RELAY.CS.NET>: check the
532 * value of cp before using it! ("root can rsh too")
533 *
534 * PWP: keep the nested ifs; the order of the tests matters and a good
535 * (smart) C compiler might re-arange things wrong.
536 */
537 #ifdef AUTOLOGOUT
538 # ifdef convex
539 if (uid == 0)
540 /* root always has a 15 minute autologout */
541 setcopy(STRautologout, STRrootdefautologout, VAR_READWRITE);
542 else
543 if (loginsh)
544 /* users get autologout set to 0 */
545 setcopy(STRautologout, STR0, VAR_READWRITE);
546 # else /* convex */
547 if (loginsh || (uid == 0)) {
548 if (*cp) {
549 /* only for login shells or root and we must have a tty */
550 if (((cp2 = Strrchr(cp, (Char) '/')) != NULL) &&
551 (Strncmp(cp, STRptssl, 3) != 0)) {
552 cp2 = cp2 + 1;
553 }
554 else
555 cp2 = cp;
556 if (!(((Strncmp(cp2, STRtty, 3) == 0) && Isalpha(cp2[3])) ||
557 Strstr(cp, STRptssl) != NULL)) {
558 if (getenv("DISPLAY") == NULL) {
559 /* NOT on X window shells */
560 setcopy(STRautologout, STRdefautologout, VAR_READWRITE);
561 }
562 }
563 }
564 }
565 # endif /* convex */
566 #endif /* AUTOLOGOUT */
567
568 sigset_interrupting(SIGALRM, queue_alrmcatch);
569
570 setcopy(STRstatus, STR0, VAR_READWRITE);
571
572 /*
573 * get and set machine specific environment variables
574 */
575 getmachine();
576
577
578 /*
579 * Publish the selected echo style
580 */
581 #if ECHO_STYLE != BSD_ECHO
582 if (tcsh) {
583 # if ECHO_STYLE == NONE_ECHO
584 setcopy(STRecho_style, STRnone, VAR_READWRITE);
585 # endif /* ECHO_STYLE == NONE_ECHO */
586 # if ECHO_STYLE == SYSV_ECHO
587 setcopy(STRecho_style, STRsysv, VAR_READWRITE);
588 # endif /* ECHO_STYLE == SYSV_ECHO */
589 # if ECHO_STYLE == BOTH_ECHO
590 setcopy(STRecho_style, STRboth, VAR_READWRITE);
591 # endif /* ECHO_STYLE == BOTH_ECHO */
592 } else
593 #endif /* ECHO_STYLE != BSD_ECHO */
594 setcopy(STRecho_style, STRbsd, VAR_READWRITE);
595
596 /*
597 * increment the shell level.
598 */
599 shlvl(1);
600
601 #ifdef __ANDROID__
602 /* On Android, $HOME either isn't set or set to /data, a R/O location.
603 Check for the environment variable EXTERNAL_STORAGE, which contains
604 the mount point of the external storage (SD card, mostly). If
605 EXTERNAL_STORAGE isn't set fall back to "/sdcard". Eventually
606 override $HOME so the environment is on the same page. */
607 if (((tcp = getenv("HOME")) != NULL && strcmp (tcp, "/data") != 0)
608 || (tcp = getenv("EXTERNAL_STORAGE")) != NULL) {
609 cp = quote(SAVE(tcp));
610 } else
611 cp = quote(SAVE("/sdcard"));
612 tsetenv(STRKHOME, cp);
613 #else
614 if ((tcp = getenv("HOME")) != NULL)
615 cp = quote(SAVE(tcp));
616 else
617 cp = NULL;
618 #endif
619
620 if (cp == NULL)
621 fast = 1; /* No home -> can't read scripts */
622 else
623 setv(STRhome, cp, VAR_READWRITE);
624
625 dinit(cp); /* dinit thinks that HOME == cwd in a login
626 * shell */
627 /*
628 * Grab other useful things from the environment. Should we grab
629 * everything??
630 */
631 {
632 char *cln, *cus, *cgr;
633 struct passwd *pw;
634 struct group *gr;
635
636
637 #ifdef apollo
638 int oid = getoid();
639
640 setv(STRoid, Itoa(oid, 0, 0), VAR_READWRITE);
641 #endif /* apollo */
642
643 setv(STReuid, Itoa(euid, 0, 0), VAR_READWRITE);
644 if ((pw = xgetpwuid(euid)) == NULL)
645 setcopy(STReuser, STRunknown, VAR_READWRITE);
646 else
647 setcopy(STReuser, str2short(pw->pw_name), VAR_READWRITE);
648
649 setv(STRuid, Itoa(uid, 0, 0), VAR_READWRITE);
650
651 setv(STRgid, Itoa(gid, 0, 0), VAR_READWRITE);
652
653 cln = getenv("LOGNAME");
654 cus = getenv("USER");
655 if (cus != NULL)
656 setv(STRuser, quote(SAVE(cus)), VAR_READWRITE);
657 else if (cln != NULL)
658 setv(STRuser, quote(SAVE(cln)), VAR_READWRITE);
659 else if ((pw = xgetpwuid(uid)) == NULL)
660 setcopy(STRuser, STRunknown, VAR_READWRITE);
661 else
662 setcopy(STRuser, str2short(pw->pw_name), VAR_READWRITE);
663 if (cln == NULL)
664 tsetenv(STRLOGNAME, varval(STRuser));
665 if (cus == NULL)
666 tsetenv(STRKUSER, varval(STRuser));
667
668 cgr = getenv("GROUP");
669 if (cgr != NULL)
670 setv(STRgroup, quote(SAVE(cgr)), VAR_READWRITE);
671 else if ((gr = xgetgrgid(gid)) == NULL)
672 setcopy(STRgroup, STRunknown, VAR_READWRITE);
673 else
674 setcopy(STRgroup, str2short(gr->gr_name), VAR_READWRITE);
675 if (cgr == NULL)
676 tsetenv(STRKGROUP, varval(STRgroup));
677 }
678
679 /*
680 * HOST may be wrong, since rexd transports the entire environment on sun
681 * 3.x Just set it again
682 */
683 {
684 char cbuff[MAXHOSTNAMELEN];
685
686 if (gethostname(cbuff, sizeof(cbuff)) >= 0) {
687 cbuff[sizeof(cbuff) - 1] = '\0'; /* just in case */
688 tsetenv(STRHOST, str2short(cbuff));
689 }
690 else
691 tsetenv(STRHOST, STRunknown);
692 }
693
694
695 #ifdef REMOTEHOST
696 /*
697 * Try to determine the remote host we were logged in from.
698 */
699 remotehost();
700 #endif /* REMOTEHOST */
701
702 #ifdef apollo
703 if ((tcp = getenv("SYSTYPE")) == NULL)
704 tcp = "bsd4.3";
705 tsetenv(STRSYSTYPE, quote(str2short(tcp)));
706 #endif /* apollo */
707
708 /*
709 * set editing on by default, unless running under Emacs as an inferior
710 * shell.
711 * We try to do this intelligently. If $TERM is available, then it
712 * should determine if we should edit or not. $TERM is preserved
713 * across rlogin sessions, so we will not get confused if we rlogin
714 * under an emacs shell. Another advantage is that if we run an
715 * xterm under an emacs shell, then the $TERM will be set to
716 * xterm, so we are going to want to edit. Unfortunately emacs
717 * does not restore all the tty modes, so xterm is not very well
718 * set up. But this is not the shell's fault.
719 * Also don't edit if $TERM == wm, for when we're running under an ATK app.
720 * Finally, emacs compiled under terminfo, sets the terminal to dumb,
721 * so disable editing for that too.
722 *
723 * Unfortunately, in some cases the initial $TERM setting is "unknown",
724 * "dumb", or "network" which is then changed in the user's startup files.
725 * We fix this by setting noediting here if $TERM is unknown/dumb and
726 * if noediting is set, we switch on editing if $TERM is changed.
727 */
728 if ((tcp = getenv("TERM")) != NULL) {
729 setv(STRterm, quote(SAVE(tcp)), VAR_READWRITE);
730 noediting = strcmp(tcp, "unknown") == 0 || strcmp(tcp, "dumb") == 0 ||
731 strcmp(tcp, "network") == 0;
732 editing = strcmp(tcp, "emacs") != 0 && strcmp(tcp, "wm") != 0 &&
733 !noediting;
734 }
735 else {
736 noediting = 0;
737 editing = ((tcp = getenv("EMACS")) == NULL || strcmp(tcp, "t") != 0);
738 }
739
740 /*
741 * The 'edit' variable is either set or unset. It doesn't
742 * need a value. Making it 'emacs' might be confusing.
743 */
744 if (editing)
745 setNS(STRedit);
746
747
748 /*
749 * still more mutability: make the complete routine automatically add the
750 * suffix of file names...
751 */
752 setNS(STRaddsuffix);
753
754 /*
755 * Compatibility with tcsh >= 6.12 by default
756 */
757 setNS(STRcsubstnonl);
758
759 /*
760 * Random default kill ring size
761 */
762 setcopy(STRkillring, str2short("30"), VAR_READWRITE);
763
764 /*
765 * Re-initialize path if set in environment
766 */
767 if ((tcp = getenv("PATH")) == NULL)
768 #ifdef _PATH_DEFPATH
769 importpath(str2short(_PATH_DEFPATH));
770 #else /* !_PATH_DEFPATH */
771 setq(STRpath, defaultpath(), &shvhed, VAR_READWRITE);
772 #endif /* _PATH_DEFPATH */
773 else
774 /* Importpath() allocates memory for the path, and the
775 * returned pointer from SAVE() was discarded, so
776 * this was a memory leak.. (sg)
777 *
778 * importpath(SAVE(tcp));
779 */
780 importpath(str2short(tcp));
781
782
783 {
784 /* If the SHELL environment variable ends with "tcsh", set
785 * STRshell to the same path. This is to facilitate using
786 * the executable in environments where the compiled-in
787 * default isn't appropriate (sg).
788 */
789
790 size_t sh_len = 0;
791
792 if ((tcp = getenv("SHELL")) != NULL) {
793 sh_len = strlen(tcp);
794 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) ||
795 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
796 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
797 else
798 sh_len = 0;
799 }
800 if (sh_len == 0)
801 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE);
802 }
803
804 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */
805 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL)
806 tcp = "SHELL";
807 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp)));
808 #endif /* _OSD_POSIX */
809
810 #ifdef COLOR_LS_F
811 if ((tcp = getenv("LS_COLORS")) != NULL)
812 parseLS_COLORS(str2short(tcp));
813 if ((tcp = getenv("LSCOLORS")) != NULL)
814 parseLSCOLORS(str2short(tcp));
815 #endif /* COLOR_LS_F */
816
817 mainpid = getpid();
818 doldol = putn((tcsh_number_t)mainpid); /* For $$ */
819 #ifdef WINNT_NATIVE
820 {
821 char *tmp;
822 Char *tmp2;
823 if ((tmp = getenv("TMP")) != NULL) {
824 tmp = xasprintf("%s/%s", tmp, "sh");
825 tmp2 = SAVE(tmp);
826 xfree(tmp);
827 }
828 else {
829 tmp2 = SAVE("");
830 }
831 shtemp = Strspl(tmp2, doldol); /* For << */
832 xfree(tmp2);
833 }
834 #else /* !WINNT_NATIVE */
835 #ifdef HAVE_MKSTEMP
836 {
837 const char *tmpdir = getenv ("TMPDIR");
838 if (!tmpdir)
839 tmpdir = "/tmp";
840 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */
841 }
842 #else /* !HAVE_MKSTEMP */
843 shtemp = Strspl(STRtmpsh, doldol); /* For << */
844 #endif /* HAVE_MKSTEMP */
845 #endif /* WINNT_NATIVE */
846
847 /*
848 * Record the interrupt states from the parent process. If the parent is
849 * non-interruptible our hand must be forced or we (and our children) won't
850 * be either. Our children inherit termination from our parent. We catch it
851 * only if we are the login shell.
852 */
853 sigaction(SIGINT, NULL, &parintr);
854 sigaction(SIGTERM, NULL, &parterm);
855
856
857 #ifdef TCF
858 /* Enable process migration on ourselves and our progeny */
859 (void) signal(SIGMIGRATE, SIG_DFL);
860 #endif /* TCF */
861
862 /*
863 * dspkanji/dspmbyte autosetting
864 */
865 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
866 #if defined(DSPMBYTE)
867 #if defined(NLS) && defined(LC_CTYPE)
868 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR))
869 #else
870 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR))
871 #endif
872 {
873 autoset_dspmbyte(str2short(tcp));
874 }
875 #if defined(WINNT_NATIVE)
876 else if (!adrof(CHECK_MBYTEVAR))
877 nt_autoset_dspmbyte();
878 #endif /* WINNT_NATIVE */
879 #endif
880 #if defined(AUTOSET_KANJI)
881 # if defined(NLS) && defined(LC_CTYPE)
882 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL)
883 # else
884 if (getenv("LANG") != NULL)
885 # endif
886 autoset_kanji();
887 #endif /* AUTOSET_KANJI */
888 fix_version(); /* publish the shell version */
889
890 if (argc > 1 && strcmp(argv[1], "--version") == 0) {
891 xprintf("%S\n", varval(STRversion));
892 xexit(0);
893 }
894 if (argc > 1 && strcmp(argv[1], "--help") == 0) {
895 xprintf("%S\n\n", varval(STRversion));
896 xprintf("%s", CGETS(11, 8, HELP_STRING));
897 xexit(0);
898 }
899 /*
900 * Process the arguments.
901 *
902 * Note that processing of -v/-x is actually delayed till after script
903 * processing.
904 *
905 * We set the first character of our name to be '-' if we are a shell
906 * running interruptible commands. Many programs which examine ps'es
907 * use this to filter such shells out.
908 */
909 argc--, tempv++;
910 while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
911 *++tcp != '\0' && !batch) {
912 do
913 switch (*tcp++) {
914
915 case 0: /* - Interruptible, no prompt */
916 prompt = 0;
917 setintr = 1;
918 nofile = 1;
919 break;
920
921 case 'b': /* -b Next arg is input file */
922 batch = 1;
923 break;
924
925 case 'c': /* -c Command input from arg */
926 if (argc == 1)
927 xexit(0);
928 argc--, tempv++;
929 #ifdef M_XENIX
930 /* Xenix Vi bug:
931 it relies on a 7 bit environment (/bin/sh), so it
932 pass ascii arguments with the 8th bit set */
933 if (!strcmp(argv[0], "sh"))
934 {
935 char *p;
936
937 for (p = tempv[0]; *p; ++p)
938 *p &= ASCII;
939 }
940 #endif
941 targinp = tempv[0];
942 prompt = 0;
943 nofile = 1;
944 break;
945 case 'd': /* -d Load directory stack from file */
946 rdirs = 1;
947 break;
948
949 #ifdef apollo
950 case 'D': /* -D Define environment variable */
951 {
952 Char *dp;
953
954 cp = str2short(tcp);
955 if (dp = Strchr(cp, '=')) {
956 *dp++ = '\0';
957 tsetenv(cp, dp);
958 }
959 else
960 tsetenv(cp, STRNULL);
961 }
962 *tcp = '\0'; /* done with this argument */
963 break;
964 #endif /* apollo */
965
966 case 'e': /* -e Exit on any error */
967 exiterr = 1;
968 break;
969
970 case 'f': /* -f Fast start */
971 fast = 1;
972 break;
973
974 case 'i': /* -i Interactive, even if !intty */
975 intact = 1;
976 nofile = 1;
977 break;
978
979 case 'm': /* -m read .cshrc (from su) */
980 mflag = 1;
981 break;
982
983 case 'n': /* -n Don't execute */
984 noexec = 1;
985 break;
986
987 case 'q': /* -q (Undoc'd) ... die on quit */
988 quitit = 1;
989 break;
990
991 case 's': /* -s Read from std input */
992 nofile = 1;
993 break;
994
995 case 't': /* -t Read one line from input */
996 onelflg = 2;
997 prompt = 0;
998 nofile = 1;
999 break;
1000
1001 case 'v': /* -v Echo hist expanded input */
1002 nverbose = 1; /* ... later */
1003 break;
1004
1005 case 'x': /* -x Echo just before execution */
1006 nexececho = 1; /* ... later */
1007 break;
1008
1009 case 'V': /* -V Echo hist expanded input */
1010 setNS(STRverbose); /* NOW! */
1011 break;
1012
1013 case 'X': /* -X Echo just before execution */
1014 setNS(STRecho); /* NOW! */
1015 break;
1016
1017 case 'F':
1018 /*
1019 * This will cause children to be created using fork instead of
1020 * vfork.
1021 */
1022 use_fork = 1;
1023 break;
1024
1025 case ' ':
1026 case '\t':
1027 case '\r':
1028 case '\n':
1029 /*
1030 * for O/S's that don't do the argument parsing right in
1031 * "#!/foo -f " scripts
1032 */
1033 break;
1034
1035 default: /* Unknown command option */
1036 exiterr = 1;
1037 stderror(ERR_TCSHUSAGE, tcp-1, progname);
1038 break;
1039
1040 } while (*tcp);
1041 tempv++, argc--;
1042 }
1043
1044 if (quitit) /* With all due haste, for debugging */
1045 (void) signal(SIGQUIT, SIG_DFL);
1046
1047 /*
1048 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
1049 * arguments the first of them is the name of a shell file from which to
1050 * read commands.
1051 */
1052 if (nofile == 0 && argc > 0) {
1053 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE);
1054 if (nofile < 0) {
1055 child = 1; /* So this ... */
1056 /* ... doesn't return */
1057 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1058 }
1059 xfree(ffile);
1060 dolzero = 1;
1061 ffile = SAVE(tempv[0]);
1062 /*
1063 * Replace FSHIN. Handle /dev/std{in,out,err} specially
1064 * since once they are closed we cannot open them again.
1065 * In that case we use our own saved descriptors
1066 */
1067 if ((SHIN = dmove(nofile, FSHIN)) < 0)
1068 switch(nofile) {
1069 case 0:
1070 SHIN = FSHIN;
1071 break;
1072 case 1:
1073 SHIN = FSHOUT;
1074 break;
1075 case 2:
1076 SHIN = FSHDIAG;
1077 break;
1078 default:
1079 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1080 break;
1081 }
1082 (void) close_on_exec(SHIN, 1);
1083 prompt = 0;
1084 /* argc not used any more */ tempv++;
1085 }
1086
1087 /*
1088 * Call to closem() used to be part of initdesc(). Now called below where
1089 * the script name argument has become stdin. Kernel may have used a file
1090 * descriptor to hold the name of the script (setuid case) and this name
1091 * mustn't be lost by closing the fd too soon.
1092 */
1093 closem();
1094
1095 /*
1096 * Consider input a tty if it really is or we are interactive. but not for
1097 * editing (christos)
1098 */
1099 if (!(intty = isatty(SHIN))) {
1100 if (adrof(STRedit))
1101 unsetv(STRedit);
1102 editing = 0;
1103 }
1104 intty |= intact;
1105 #ifndef convex
1106 if (intty || (intact && isatty(SHOUT))) {
1107 if (!batch && (uid != euid || gid != egid)) {
1108 errno = EACCES;
1109 child = 1; /* So this ... */
1110 /* ... doesn't return */
1111 stderror(ERR_SYSTEM, progname, strerror(errno));
1112 }
1113 }
1114 #endif /* convex */
1115 isoutatty = isatty(SHOUT);
1116 isdiagatty = isatty(SHDIAG);
1117 /*
1118 * Decide whether we should play with signals or not. If we are explicitly
1119 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
1120 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
1121 * Note that in only the login shell is it likely that parent may have set
1122 * signals to be ignored
1123 */
1124 if (loginsh || intact || (intty && isatty(SHOUT)))
1125 setintr = 1;
1126 settell();
1127 /*
1128 * Save the remaining arguments in argv.
1129 */
1130 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
1131
1132 /*
1133 * Set up the prompt.
1134 */
1135 if (prompt) {
1136 setcopy(STRprompt, STRdefprompt, VAR_READWRITE);
1137 /* that's a meta-questionmark */
1138 setcopy(STRprompt2, STRmquestion, VAR_READWRITE);
1139 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE);
1140 }
1141
1142 /*
1143 * If we are an interactive shell, then start fiddling with the signals;
1144 * this is a tricky game.
1145 */
1146 shpgrp = mygetpgrp();
1147 opgrp = tpgrp = -1;
1148 if (setintr) {
1149 struct sigaction osig;
1150
1151 **argv = '-';
1152 if (!quitit) /* Wary! */
1153 (void) signal(SIGQUIT, SIG_IGN);
1154 pintr_disabled = 1;
1155 sigset_interrupting(SIGINT, queue_pintr);
1156 (void) signal(SIGTERM, SIG_IGN);
1157
1158 /*
1159 * No reason I can see not to save history on all these events..
1160 * Most usual occurrence is in a window system, where we're not a login
1161 * shell, but might as well be... (sg)
1162 * But there might be races when lots of shells exit together...
1163 * [this is also incompatible].
1164 * We have to be mre careful here. If the parent wants to
1165 * ignore the signals then we leave them untouched...
1166 * We also only setup the handlers for shells that are trully
1167 * interactive.
1168 */
1169 sigaction(SIGHUP, NULL, &osig);
1170 if (loginsh || osig.sa_handler != SIG_IGN)
1171 /* exit processing on HUP */
1172 sigset_interrupting(SIGHUP, queue_phup);
1173 #ifdef SIGXCPU
1174 sigaction(SIGXCPU, NULL, &osig);
1175 if (loginsh || osig.sa_handler != SIG_IGN)
1176 /* exit processing on XCPU */
1177 sigset_interrupting(SIGXCPU, queue_phup);
1178 #endif
1179 #ifdef SIGXFSZ
1180 sigaction(SIGXFSZ, NULL, &osig);
1181 if (loginsh || osig.sa_handler != SIG_IGN)
1182 /* exit processing on XFSZ */
1183 sigset_interrupting(SIGXFSZ, queue_phup);
1184 #endif
1185
1186 if (quitit == 0 && targinp == 0) {
1187 #ifdef SIGTSTP
1188 (void) signal(SIGTSTP, SIG_IGN);
1189 #endif
1190 #ifdef SIGTTIN
1191 (void) signal(SIGTTIN, SIG_IGN);
1192 #endif
1193 #ifdef SIGTTOU
1194 (void) signal(SIGTTOU, SIG_IGN);
1195 #endif
1196 /*
1197 * Wait till in foreground, in case someone stupidly runs csh &
1198 * dont want to try to grab away the tty.
1199 */
1200 if (isatty(FSHDIAG))
1201 f = FSHDIAG;
1202 else if (isatty(FSHOUT))
1203 f = FSHOUT;
1204 else if (isatty(OLDSTD))
1205 f = OLDSTD;
1206 else
1207 f = -1;
1208
1209 #ifdef NeXT
1210 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1211 if (f != -1 && shpgrp == 0) {
1212 shpgrp = getpid();
1213 (void) setpgid(0, shpgrp);
1214 (void) tcsetpgrp(f, shpgrp);
1215 }
1216 #endif /* NeXT */
1217 #ifdef BSDJOBS /* if we have tty job control */
1218 if (f != -1 && grabpgrp(f, shpgrp) != -1) {
1219 /*
1220 * Thanks to Matt Day for the POSIX references, and to
1221 * Paul Close for the SGI clarification.
1222 */
1223 if (setdisc(f) != -1) {
1224 opgrp = shpgrp;
1225 shpgrp = getpid();
1226 tpgrp = shpgrp;
1227 if (tcsetpgrp(f, shpgrp) == -1) {
1228 /*
1229 * On hpux 7.03 this fails with EPERM. This happens on
1230 * the 800 when opgrp != shpgrp at this point. (we were
1231 * forked from a non job control shell)
1232 * POSIX 7.2.4, says we failed because the process
1233 * group specified did not belong to a process
1234 * in the same session with the tty. So we set our
1235 * process group and try again.
1236 */
1237 if (setpgid(0, shpgrp) == -1) {
1238 xprintf("setpgid:");
1239 goto notty;
1240 }
1241 if (tcsetpgrp(f, shpgrp) == -1) {
1242 xprintf("tcsetpgrp:");
1243 goto notty;
1244 }
1245 }
1246 /*
1247 * We check the process group now. If it is the same, then
1248 * we don't need to set it again. On hpux 7.0 on the 300's
1249 * if we set it again it fails with EPERM. This is the
1250 * correct behavior according to POSIX 4.3.3 if the process
1251 * was a session leader .
1252 */
1253 else if (shpgrp != mygetpgrp()) {
1254 if(setpgid(0, shpgrp) == -1) {
1255 xprintf("setpgid:");
1256 goto notty;
1257 }
1258 }
1259 #ifdef IRIS4D
1260 /*
1261 * But on irix 3.3 we need to set it again, even if it is
1262 * the same. We do that to tell the system that we
1263 * need BSD process group compatibility.
1264 */
1265 else
1266 (void) setpgid(0, shpgrp);
1267 #endif
1268 (void) close_on_exec(dcopy(f, FSHTTY), 1);
1269 }
1270 else
1271 tpgrp = -1;
1272 }
1273 if (tpgrp == -1) {
1274 notty:
1275 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1276 strerror(errno));
1277 xprintf("%s",
1278 CGETS(11, 2, "Thus no job control in this shell.\n"));
1279 /*
1280 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1281 * have access to tty, disable editing too
1282 */
1283 if (adrof(STRedit))
1284 unsetv(STRedit);
1285 editing = 0;
1286 }
1287 #else /* BSDJOBS */ /* don't have job control, so frotz it */
1288 tpgrp = -1;
1289 #endif /* BSDJOBS */
1290 }
1291 }
1292 if (setintr == 0 && parintr.sa_handler == SIG_DFL)
1293 setintr = 1;
1294
1295 /*
1296 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1297 * handler is installed with signal(2) or sigset(2). sigaction(2) must
1298 * be used instead.
1299 *
1300 * David Dawes (dawes@physics.su.oz.au) Sept 1991
1301 */
1302 sigset_interrupting(SIGCHLD, queue_pchild);
1303
1304 if (intty && !targinp)
1305 (void) ed_Setup(editing);/* Get the tty state, and set defaults */
1306 /* Only alter the tty state if editing */
1307
1308 /*
1309 * Set an exit here in case of an interrupt or error reading the shell
1310 * start-up scripts.
1311 */
1312 osetintr = setintr;
1313 oparintr = parintr;
1314 (void)cleanup_push_mark(); /* There is no outer handler */
1315 if (setexit() != 0) /* PWP */
1316 reenter = 1;
1317 else
1318 reenter = 0;
1319 exitset++;
1320 haderr = 0; /* In case second time through */
1321 if (!fast && reenter == 0) {
1322 /* Will have varval(STRhome) here because set fast if don't */
1323 {
1324 pintr_disabled++;
1325 cleanup_push(&pintr_disabled, disabled_cleanup);
1326 setintr = 0;/*FIXRESET:cleanup*/
1327 /* onintr in /etc/ files has no effect */
1328 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/
1329 #ifdef LOGINFIRST
1330 #ifdef _PATH_DOTLOGIN
1331 if (loginsh)
1332 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1333 #endif
1334 #endif
1335
1336 #ifdef _PATH_DOTCSHRC
1337 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
1338 #endif
1339 if (!targinp && !onelflg && !havhash)
1340 dohash(NULL,NULL);
1341 #ifndef LOGINFIRST
1342 #ifdef _PATH_DOTLOGIN
1343 if (loginsh)
1344 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1345 #endif
1346 #endif
1347 cleanup_until(&pintr_disabled);
1348 setintr = osetintr;
1349 parintr = oparintr;
1350 }
1351 #ifdef LOGINFIRST
1352 if (loginsh)
1353 (void) srccat(varval(STRhome), STRsldotlogin);
1354 #endif
1355 /* upward compat. */
1356 if (!srccat(varval(STRhome), STRsldottcshrc))
1357 (void) srccat(varval(STRhome), STRsldotcshrc);
1358
1359 if (!targinp && !onelflg && !havhash)
1360 dohash(NULL,NULL);
1361
1362 /*
1363 * Source history before .login so that it is available in .login
1364 */
1365 loadhist(NULL, 0);
1366 #ifndef LOGINFIRST
1367 if (loginsh)
1368 (void) srccat(varval(STRhome), STRsldotlogin);
1369 #endif
1370 if (loginsh || rdirs)
1371 loaddirs(NULL);
1372 }
1373 /* Reset interrupt flag */
1374 setintr = osetintr;
1375 parintr = oparintr;
1376 exitset--;
1377
1378 /* Initing AFTER .cshrc is the Right Way */
1379 if (intty && !targinp) { /* PWP setup stuff */
1380 ed_Init(); /* init the new line editor */
1381 #ifdef SIG_WINDOW
1382 check_window_size(1); /* mung environment */
1383 #endif /* SIG_WINDOW */
1384 }
1385
1386 /*
1387 * Now are ready for the -v and -x flags
1388 */
1389 if (nverbose)
1390 setNS(STRverbose);
1391 if (nexececho)
1392 setNS(STRecho);
1393
1394
1395 if (targinp) {
1396 arginp = SAVE(targinp);
1397 /*
1398 * we put the command into a variable
1399 */
1400 if (arginp != NULL)
1401 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
1402
1403 /*
1404 * * Give an error on -c arguments that end in * backslash to
1405 * ensure that you don't make * nonportable csh scripts.
1406 */
1407 {
1408 int count;
1409
1410 cp = Strend(arginp);
1411 count = 0;
1412 while (cp > arginp && *--cp == '\\')
1413 ++count;
1414 if ((count & 1) != 0) {
1415 exiterr = 1;
1416 stderror(ERR_ARGC);
1417 }
1418 }
1419 }
1420 /*
1421 * All the rest of the world is inside this call. The argument to process
1422 * indicates whether it should catch "error unwinds". Thus if we are a
1423 * interactive shell our call here will never return by being blown past on
1424 * an error.
1425 */
1426 process(setintr);
1427
1428 /*
1429 * Mop-up.
1430 */
1431 /* Take care of these (especially HUP) here instead of inside flush. */
1432 handle_pending_signals();
1433 if (intty) {
1434 if (loginsh) {
1435 xprintf("logout\n");
1436 xclose(SHIN);
1437 child = 1;
1438 #ifdef TESLA
1439 do_logout = 1;
1440 #endif /* TESLA */
1441 goodbye(NULL, NULL);
1442 }
1443 else {
1444 xprintf("exit\n");
1445 }
1446 }
1447 record();
1448 exitstat();
1449 return (0);
1450 }
1451
1452 void
untty(void)1453 untty(void)
1454 {
1455 #ifdef BSDJOBS
1456 if (tpgrp > 0 && opgrp != shpgrp) {
1457 (void) setpgid(0, opgrp);
1458 (void) tcsetpgrp(FSHTTY, opgrp);
1459 (void) resetdisc(FSHTTY);
1460 }
1461 #endif /* BSDJOBS */
1462 }
1463
1464 void
importpath(Char * cp)1465 importpath(Char *cp)
1466 {
1467 size_t i = 0;
1468 Char *dp;
1469 Char **pv;
1470 int c;
1471
1472 for (dp = cp; *dp; dp++)
1473 if (*dp == PATHSEP)
1474 i++;
1475 /*
1476 * i+2 where i is the number of colons in the path. There are i+1
1477 * directories in the path plus we need room for a zero terminator.
1478 */
1479 pv = xcalloc(i + 2, sizeof(Char *));
1480 dp = cp;
1481 i = 0;
1482 if (*dp)
1483 for (;;) {
1484 if ((c = *dp) == PATHSEP || c == 0) {
1485 *dp = 0;
1486 pv[i++] = Strsave(*cp ? cp : STRdot);
1487 if (c) {
1488 cp = dp + 1;
1489 *dp = PATHSEP;
1490 }
1491 else
1492 break;
1493 }
1494 #ifdef WINNT_NATIVE
1495 else if (*dp == '\\')
1496 *dp = '/';
1497 #endif /* WINNT_NATIVE */
1498 dp++;
1499 }
1500 pv[i] = 0;
1501 cleanup_push(pv, blk_cleanup);
1502 setq(STRpath, pv, &shvhed, VAR_READWRITE);
1503 cleanup_ignore(pv);
1504 cleanup_until(pv);
1505 }
1506
1507 /*
1508 * Source to the file which is the catenation of the argument names.
1509 */
1510 static int
srccat(Char * cp,Char * dp)1511 srccat(Char *cp, Char *dp)
1512 {
1513 if (cp[0] == '/' && cp[1] == '\0')
1514 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
1515 else {
1516 Char *ep;
1517 char *ptr;
1518 int rv;
1519
1520 #ifdef WINNT_NATIVE
1521 ep = Strend(cp);
1522 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */
1523 dp++;
1524 #endif /* WINNT_NATIVE */
1525
1526 ep = Strspl(cp, dp);
1527 cleanup_push(ep, xfree);
1528 ptr = short2str(ep);
1529
1530 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
1531 cleanup_until(ep);
1532 return rv;
1533 }
1534 }
1535
1536 /*
1537 * Source to a file putting the file descriptor in a safe place (> 2).
1538 */
1539 #ifndef WINNT_NATIVE
1540 static int
1541 #else
1542 int
1543 #endif /*WINNT_NATIVE*/
srcfile(const char * f,int onlyown,int flag,Char ** av)1544 srcfile(const char *f, int onlyown, int flag, Char **av)
1545 {
1546 int unit;
1547
1548 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1)
1549 return 0;
1550 cleanup_push(&unit, open_cleanup);
1551 unit = dmove(unit, -1);
1552 cleanup_ignore(&unit);
1553 cleanup_until(&unit);
1554
1555 (void) close_on_exec(unit, 1);
1556 srcunit(unit, onlyown, flag, av);
1557 return 1;
1558 }
1559
1560
1561 /*
1562 * Save the shell state, and establish new argument vector, and new input
1563 * fd.
1564 */
1565 static void
st_save(struct saved_state * st,int unit,int hflg,Char ** al,Char ** av)1566 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av)
1567 {
1568 st->insource = insource;
1569 st->SHIN = SHIN;
1570 /* Want to preserve the meaning of "source file >output".
1571 * Save old descriptors, move new 0,1,2 to safe places and assign
1572 * them to SH* and let process() redo 0,1,2 from them.
1573 *
1574 * The macro returns true if d1 and d2 are good and they point to
1575 * different things. If you don't avoid saving duplicate
1576 * descriptors, you really limit the depth of "source" recursion
1577 * you can do because of all the open file descriptors. -IAN!
1578 */
1579 #define NEED_SAVE_FD(d1,d2) \
1580 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
1581 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) )
1582
1583 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */
1584 if (didfds) {
1585 struct stat s1, s2;
1586 if (NEED_SAVE_FD(0,OLDSTD)) {
1587 st->OLDSTD = OLDSTD;
1588 OLDSTD = dmove(0, -1);
1589 (void)close_on_exec(OLDSTD, 1);
1590 }
1591 if (NEED_SAVE_FD(1,SHOUT)) {
1592 st->SHOUT = SHOUT;
1593 SHOUT = dmove(1, -1);
1594 (void)close_on_exec(SHOUT, 1);
1595 }
1596 if (NEED_SAVE_FD(2,SHDIAG)) {
1597 st->SHDIAG = SHDIAG;
1598 SHDIAG = dmove(2, -1);
1599 (void)close_on_exec(SHDIAG, 1);
1600 }
1601 donefds();
1602 }
1603
1604 st->intty = intty;
1605 st->whyles = whyles;
1606 st->gointr = gointr;
1607 st->arginp = arginp;
1608 st->evalp = evalp;
1609 st->evalvec = evalvec;
1610 st->alvecp = alvecp;
1611 st->alvec = alvec;
1612 st->onelflg = onelflg;
1613 st->enterhist = enterhist;
1614 st->justpr = justpr;
1615 if (hflg)
1616 st->HIST = HIST;
1617 else
1618 st->HIST = '\0';
1619 st->cantell = cantell;
1620 cpybin(st->B, B);
1621
1622 /*
1623 * we can now pass arguments to source.
1624 * For compatibility we do that only if arguments were really
1625 * passed, otherwise we keep the old, global $argv like before.
1626 */
1627 if (av != NULL && *av != NULL) {
1628 struct varent *vp;
1629 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL)
1630 st->argv = saveblk(vp->vec);
1631 else
1632 st->argv = NULL;
1633 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
1634 }
1635 else
1636 st->argv = NULL;
1637 st->av = av;
1638
1639 SHIN = unit; /* Do this first */
1640
1641 /* Establish new input arena */
1642 {
1643 fbuf = NULL;
1644 fseekp = feobp = fblocks = 0;
1645 settell();
1646 }
1647
1648 arginp = 0;
1649 onelflg = 0;
1650 intty = isatty(SHIN);
1651 whyles = 0;
1652 gointr = 0;
1653 evalvec = 0;
1654 evalp = 0;
1655 alvec = al;
1656 alvecp = 0;
1657 enterhist = hflg;
1658 if (enterhist)
1659 HIST = '\0';
1660 insource = 1;
1661 }
1662
1663
1664 /*
1665 * Restore the shell to a saved state
1666 */
1667 static void
st_restore(void * xst)1668 st_restore(void *xst)
1669 {
1670 struct saved_state *st;
1671
1672 st = xst;
1673 if (st->SHIN == -1)
1674 return;
1675
1676 /* Reset input arena */
1677 {
1678 int i;
1679 Char** nfbuf = fbuf;
1680 int nfblocks = fblocks;
1681
1682 fblocks = 0;
1683 fbuf = NULL;
1684 for (i = 0; i < nfblocks; i++)
1685 xfree(nfbuf[i]);
1686 xfree(nfbuf);
1687 }
1688 cpybin(B, st->B);
1689
1690 xclose(SHIN);
1691
1692 insource = st->insource;
1693 SHIN = st->SHIN;
1694 if (st->OLDSTD != -1)
1695 xclose(OLDSTD), OLDSTD = st->OLDSTD;
1696 if (st->SHOUT != -1)
1697 xclose(SHOUT), SHOUT = st->SHOUT;
1698 if (st->SHDIAG != -1)
1699 xclose(SHDIAG), SHDIAG = st->SHDIAG;
1700 arginp = st->arginp;
1701 onelflg = st->onelflg;
1702 evalp = st->evalp;
1703 evalvec = st->evalvec;
1704 alvecp = st->alvecp;
1705 alvec = st->alvec;
1706 intty = st->intty;
1707 whyles = st->whyles;
1708 gointr = st->gointr;
1709 if (st->HIST != '\0')
1710 HIST = st->HIST;
1711 enterhist = st->enterhist;
1712 cantell = st->cantell;
1713 justpr = st->justpr;
1714
1715 if (st->argv != NULL)
1716 setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
1717 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL)
1718 unsetv(STRargv);
1719 }
1720
1721 /*
1722 * Source to a unit. If onlyown it must be our file or our group or
1723 * we don't chance it. This occurs on ".cshrc"s and the like.
1724 */
1725 static void
srcunit(int unit,int onlyown,int hflg,Char ** av)1726 srcunit(int unit, int onlyown, int hflg, Char **av)
1727 {
1728 struct saved_state st;
1729
1730 st.SHIN = -1; /* st_restore checks this */
1731
1732 if (unit < 0)
1733 return;
1734
1735 if (onlyown) {
1736 struct stat stb;
1737
1738 if (fstat(unit, &stb) < 0) {
1739 xclose(unit);
1740 return;
1741 }
1742 }
1743
1744 /* Does nothing before st_save() because st.SHIN == -1 */
1745 cleanup_push(&st, st_restore);
1746 if (setintr) {
1747 pintr_disabled++;
1748 cleanup_push(&pintr_disabled, disabled_cleanup);
1749 }
1750
1751 /* Save the current state and move us to a new state */
1752 st_save(&st, unit, hflg, NULL, av);
1753
1754 /*
1755 * Now if we are allowing commands to be interrupted, we let ourselves be
1756 * interrupted.
1757 */
1758 if (setintr) {
1759 cleanup_until(&pintr_disabled);
1760 pintr_disabled++;
1761 cleanup_push(&pintr_disabled, disabled_cleanup);
1762 }
1763
1764 process(0); /* 0 -> blow away on errors */
1765
1766 /* Restore the old state */
1767 cleanup_until(&st);
1768 }
1769
1770
1771 /*ARGSUSED*/
1772 void
goodbye(Char ** v,struct command * c)1773 goodbye(Char **v, struct command *c)
1774 {
1775 USE(v);
1776 USE(c);
1777 record();
1778
1779 if (loginsh) {
1780 size_t omark;
1781 sigset_t set;
1782
1783 sigemptyset(&set);
1784 signal(SIGQUIT, SIG_IGN);
1785 sigaddset(&set, SIGQUIT);
1786 sigprocmask(SIG_UNBLOCK, &set, NULL);
1787 signal(SIGINT, SIG_IGN);
1788 sigaddset(&set, SIGINT);
1789 signal(SIGTERM, SIG_IGN);
1790 sigaddset(&set, SIGTERM);
1791 signal(SIGHUP, SIG_IGN);
1792 sigaddset(&set, SIGHUP);
1793 sigprocmask(SIG_UNBLOCK, &set, NULL);
1794 phup_disabled = 1;
1795 setintr = 0; /* No interrupts after "logout" */
1796 /* Trap errors inside .logout */
1797 omark = cleanup_push_mark();
1798 if (setexit() == 0) {
1799 if (!(adrof(STRlogout)))
1800 setcopy(STRlogout, STRnormal, VAR_READWRITE);
1801 #ifdef _PATH_DOTLOGOUT
1802 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1803 #endif
1804 if (adrof(STRhome))
1805 (void) srccat(varval(STRhome), STRsldtlogout);
1806 #ifdef TESLA
1807 do_logout = 1;
1808 #endif /* TESLA */
1809 }
1810 cleanup_pop_mark(omark);
1811 }
1812 exitstat();
1813 }
1814
1815 void
exitstat(void)1816 exitstat(void)
1817 {
1818 #ifdef PROF
1819 _mcleanup();
1820 #endif
1821 /*
1822 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1823 * directly because we poke child here. Otherwise we might continue
1824 * unwarrantedly (sic).
1825 */
1826 child = 1;
1827
1828 xexit(getn(varval(STRstatus)));
1829 }
1830
1831 /*
1832 * in the event of a HUP we want to save the history
1833 */
1834 void
phup(void)1835 phup(void)
1836 {
1837 if (loginsh) {
1838 setcopy(STRlogout, STRhangup, VAR_READWRITE);
1839 #ifdef _PATH_DOTLOGOUT
1840 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1841 #endif
1842 if (adrof(STRhome))
1843 (void) srccat(varval(STRhome), STRsldtlogout);
1844 }
1845
1846 record();
1847
1848 #ifdef POSIXJOBS
1849 /*
1850 * We kill the last foreground process group. It then becomes
1851 * responsible to propagate the SIGHUP to its progeny.
1852 */
1853 {
1854 struct process *pp, *np;
1855
1856 for (pp = proclist.p_next; pp; pp = pp->p_next) {
1857 np = pp;
1858 /*
1859 * Find if this job is in the foreground. It could be that
1860 * the process leader has exited and the foreground flag
1861 * is cleared for it.
1862 */
1863 do
1864 /*
1865 * If a process is in the foreground we try to kill
1866 * it's process group. If we succeed, then the
1867 * whole job is gone. Otherwise we keep going...
1868 * But avoid sending HUP to the shell again.
1869 */
1870 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1871 np->p_flags &= ~PHUP;
1872 if (killpg(np->p_jobid, SIGHUP) != -1) {
1873 /* In case the job was suspended... */
1874 #ifdef SIGCONT
1875 (void) killpg(np->p_jobid, SIGCONT);
1876 #endif
1877 break;
1878 }
1879 }
1880 while ((np = np->p_friends) != pp);
1881 }
1882 }
1883 #endif /* POSIXJOBS */
1884
1885 xexit(SIGHUP);
1886 }
1887
1888 static Char *jobargv[2] = {STRjobs, 0};
1889
1890 /*
1891 * Catch an interrupt, e.g. during lexical input.
1892 * If we are an interactive shell, we reset the interrupt catch
1893 * immediately. In any case we drain the shell output,
1894 * and finally go through the normal error mechanism, which
1895 * gets a chance to make the shell go away.
1896 */
1897 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1898
1899 void
pintr(void)1900 pintr(void)
1901 {
1902 just_signaled = 1;
1903 pintr1(1);
1904 }
1905
1906 void
pintr1(int wantnl)1907 pintr1(int wantnl)
1908 {
1909 if (setintr) {
1910 if (pjobs) {
1911 pjobs = 0;
1912 xputchar('\n');
1913 dojobs(jobargv, NULL);
1914 stderror(ERR_NAME | ERR_INTR);
1915 }
1916 }
1917 /* MH - handle interrupted completions specially */
1918 {
1919 if (InsideCompletion)
1920 stderror(ERR_SILENT);
1921 }
1922 /* JV - Make sure we shut off inputl */
1923 {
1924 (void) Cookedmode();
1925 GettingInput = 0;
1926 if (evalvec)
1927 doneinp = 1;
1928 }
1929 drainoline();
1930 #ifdef HAVE_GETPWENT
1931 (void) endpwent();
1932 #endif
1933
1934 /*
1935 * If we have an active "onintr" then we search for the label. Note that if
1936 * one does "onintr -" then we shan't be interruptible so we needn't worry
1937 * about that here.
1938 */
1939 if (gointr) {
1940 gotolab(gointr);
1941 reset();
1942 }
1943 else if (intty && wantnl) {
1944 if (editing) {
1945 /*
1946 * If we are editing a multi-line input command, and move to
1947 * the beginning of the line, we don't want to trash it when
1948 * we hit ^C
1949 */
1950 PastBottom();
1951 ClearLines();
1952 ClearDisp();
1953 }
1954 else {
1955 /* xputchar('\n'); *//* Some like this, others don't */
1956 (void) putraw('\r');
1957 (void) putraw('\n');
1958 }
1959 }
1960 stderror(ERR_SILENT);
1961 }
1962
1963 /*
1964 * Process is the main driving routine for the shell.
1965 * It runs all command processing, except for those within { ... }
1966 * in expressions (which is run by a routine evalav in sh.exp.c which
1967 * is a stripped down process), and `...` evaluation which is run
1968 * also by a subset of this code in sh.glob.c in the routine backeval.
1969 *
1970 * The code here is a little strange because part of it is interruptible
1971 * and hence freeing of structures appears to occur when none is necessary
1972 * if this is ignored.
1973 *
1974 * Note that if catch is not set then we will unwind on any error.
1975 * If an end-of-file occurs, we return.
1976 */
1977 void
process(int catch)1978 process(int catch)
1979 {
1980 jmp_buf_t osetexit;
1981 /* PWP: This might get nuked by longjmp so don't make it a register var */
1982 size_t omark;
1983 volatile int didexitset = 0;
1984
1985 getexit(osetexit);
1986 omark = cleanup_push_mark();
1987 for (;;) {
1988 struct command *t;
1989 int hadhist, old_pintr_disabled;
1990
1991 (void)setexit();
1992 if (didexitset == 0) {
1993 exitset++;
1994 didexitset++;
1995 }
1996 pendjob();
1997
1998 justpr = enterhist; /* execute if not entering history */
1999
2000 if (haderr) {
2001 if (!catch) {
2002 /* unwind */
2003 doneinp = 0;
2004 cleanup_pop_mark(omark);
2005 resexit(osetexit);
2006 reset();
2007 }
2008 haderr = 0;
2009 /*
2010 * Every error is eventually caught here or the shell dies. It is
2011 * at this point that we clean up any left-over open files, by
2012 * closing all but a fixed number of pre-defined files. Thus
2013 * routines don't have to worry about leaving files open due to
2014 * deeper errors... they will get closed here.
2015 */
2016 closem();
2017 continue;
2018 }
2019 if (doneinp) {
2020 doneinp = 0;
2021 break;
2022 }
2023 if (chkstop)
2024 chkstop--;
2025 if (neednote)
2026 pnote();
2027 if (intty && prompt && evalvec == 0) {
2028 just_signaled = 0;
2029 mailchk();
2030 /*
2031 * Watch for logins/logouts. Next is scheduled commands stored
2032 * previously using "sched." Then execute periodic commands.
2033 * Following that, the prompt precmd is run.
2034 */
2035 #ifndef HAVENOUTMP
2036 watch_login(0);
2037 #endif /* !HAVENOUTMP */
2038 sched_run();
2039 period_cmd();
2040 precmd();
2041 /*
2042 * If we are at the end of the input buffer then we are going to
2043 * read fresh stuff. Otherwise, we are rereading input and don't
2044 * need or want to prompt.
2045 */
2046 if (fseekp == feobp && aret == TCSH_F_SEEK)
2047 printprompt(0, NULL);
2048 flush();
2049 setalarm(1);
2050 }
2051 if (seterr) {
2052 xfree(seterr);
2053 seterr = NULL;
2054 }
2055
2056 /*
2057 * Interruptible during interactive reads
2058 */
2059 if (setintr)
2060 pintr_push_enable(&old_pintr_disabled);
2061 freelex(¶ml);
2062 hadhist = lex(¶ml);
2063 if (setintr)
2064 cleanup_until(&old_pintr_disabled);
2065 cleanup_push(¶ml, lex_cleanup);
2066
2067 /*
2068 * Echo not only on VERBOSE, but also with history expansion. If there
2069 * is a lexical error then we forego history echo.
2070 * Do not echo if we're only entering history (source -h).
2071 */
2072 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) ||
2073 (!enterhist && adrof(STRverbose)))
2074 {
2075 int odidfds = didfds;
2076 haderr = 1;
2077 didfds = 0;
2078 prlex(¶ml);
2079 flush();
2080 haderr = 0;
2081 didfds = odidfds;
2082 }
2083 (void) alarm(0); /* Autologout OFF */
2084 alrmcatch_disabled = 1;
2085
2086 /*
2087 * Save input text on the history list if reading in old history, or it
2088 * is from the terminal at the top level and not in a loop.
2089 *
2090 * PWP: entry of items in the history list while in a while loop is done
2091 * elsewhere...
2092 */
2093 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun))
2094 savehist(¶ml, enterhist > 1);
2095
2096 if (Expand && seterr)
2097 Expand = 0;
2098
2099 /*
2100 * Print lexical error messages, except when sourcing history lists.
2101 */
2102 if (!enterhist && seterr)
2103 stderror(ERR_OLD);
2104
2105 /*
2106 * If had a history command :p modifier then this is as far as we
2107 * should go
2108 */
2109 if (justpr)
2110 goto cmd_done;
2111
2112 /*
2113 * If had a tellwhat from twenex() then do
2114 */
2115 if (tellwhat) {
2116 (void) tellmewhat(¶ml, NULL);
2117 goto cmd_done;
2118 }
2119
2120 alias(¶ml);
2121
2122 #ifdef BSDJOBS
2123 /*
2124 * If we are interactive, try to continue jobs that we have stopped
2125 */
2126 if (prompt)
2127 continue_jobs(¶ml);
2128 #endif /* BSDJOBS */
2129
2130 /*
2131 * Check to see if the user typed "rm * .o" or something
2132 */
2133 if (prompt)
2134 rmstar(¶ml);
2135 /*
2136 * Parse the words of the input into a parse tree.
2137 */
2138 t = syntax(paraml.next, ¶ml, 0);
2139 /*
2140 * We cannot cleanup push here, because cd /blah; echo foo
2141 * would rewind t on the chdir error, and free the rest of the command
2142 */
2143 if (seterr) {
2144 freesyn(t);
2145 stderror(ERR_OLD);
2146 }
2147
2148 postcmd();
2149 /*
2150 * Execute the parse tree From: Michael Schroeder
2151 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2152 */
2153 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
2154 freesyn(t);
2155
2156 /*
2157 * Made it!
2158 */
2159 #ifdef SIG_WINDOW
2160 if (windowchg || (catch && intty && !whyles && !tellwhat)) {
2161 (void) check_window_size(0); /* for window systems */
2162 }
2163 #endif /* SIG_WINDOW */
2164 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB);
2165 cmd_done:
2166 if (cleanup_reset())
2167 cleanup_until(¶ml);
2168 else
2169 haderr = 1;
2170 }
2171 cleanup_pop_mark(omark);
2172 resexit(osetexit);
2173 exitset--;
2174 handle_pending_signals();
2175 }
2176
2177 /*ARGSUSED*/
2178 void
dosource(Char ** t,struct command * c)2179 dosource(Char **t, struct command *c)
2180 {
2181 Char *f;
2182 int hflg = 0;
2183 char *file;
2184
2185 USE(c);
2186 t++;
2187 if (*t && eq(*t, STRmh)) {
2188 if (*++t == NULL)
2189 stderror(ERR_NAME | ERR_HFLAG);
2190 hflg++;
2191 }
2192 else if (*t && eq(*t, STRmm)) {
2193 if (*++t == NULL)
2194 stderror(ERR_NAME | ERR_MFLAG);
2195 hflg = 2;
2196 }
2197
2198 f = globone(*t++, G_ERROR);
2199 file = strsave(short2str(f));
2200 cleanup_push(file, xfree);
2201 xfree(f);
2202 t = glob_all_or_error(t);
2203 cleanup_push(t, blk_cleanup);
2204 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet))
2205 stderror(ERR_SYSTEM, file, strerror(errno));
2206 cleanup_until(file);
2207 }
2208
2209 /*
2210 * Check for mail.
2211 * If we are a login shell, then we don't want to tell
2212 * about any mail file unless its been modified
2213 * after the time we started.
2214 * This prevents us from telling the user things he already
2215 * knows, since the login program insists on saying
2216 * "You have mail."
2217 */
2218
2219 /*
2220 * The AMS version.
2221 * This version checks if the file is a directory, and if so,
2222 * tells you the number of files in it, otherwise do the old thang.
2223 * The magic "+1" in the time calculation is to compensate for
2224 * an AFS bug where directory mtimes are set to 1 second in
2225 * the future.
2226 */
2227
2228 static void
mailchk(void)2229 mailchk(void)
2230 {
2231 struct varent *v;
2232 Char **vp;
2233 time_t t;
2234 int intvl, cnt;
2235 struct stat stb;
2236 int new;
2237
2238 v = adrof(STRmail);
2239 if (v == NULL || v->vec == NULL)
2240 return;
2241 (void) time(&t);
2242 vp = v->vec;
2243 cnt = blklen(vp);
2244 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
2245 if (intvl < 1)
2246 intvl = 1;
2247 if (chktim + intvl > t)
2248 return;
2249 for (; *vp; vp++) {
2250 char *filename = short2str(*vp);
2251 char *mboxdir = filename;
2252
2253 if (stat(filename, &stb) < 0)
2254 continue;
2255 #if defined(BSDTIMES) || defined(_SEQUENT_)
2256 new = stb.st_mtime > time0.tv_sec;
2257 #else
2258 new = stb.st_mtime > seconds0;
2259 #endif
2260 if (S_ISDIR(stb.st_mode)) {
2261 DIR *mailbox;
2262 int mailcount = 0;
2263 char *tempfilename;
2264 struct stat stc;
2265
2266 tempfilename = xasprintf("%s/new", filename);
2267
2268 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2269 /*
2270 * "filename/new" exists and is a directory; you are
2271 * using Qmail.
2272 */
2273 stb = stc;
2274 #if defined(BSDTIMES) || defined(_SEQUENT_)
2275 new = stb.st_mtime > time0.tv_sec;
2276 #else
2277 new = stb.st_mtime > seconds0;
2278 #endif
2279 mboxdir = tempfilename;
2280 }
2281
2282 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) {
2283 xfree(tempfilename);
2284 continue;
2285 }
2286
2287 mailbox = opendir(mboxdir);
2288 xfree(tempfilename);
2289 if (mailbox == NULL)
2290 continue;
2291
2292 /* skip . and .. */
2293 if (!readdir(mailbox) || !readdir(mailbox)) {
2294 (void)closedir(mailbox);
2295 continue;
2296 }
2297
2298 while (readdir(mailbox))
2299 mailcount++;
2300
2301 (void)closedir(mailbox);
2302 if (mailcount == 0)
2303 continue;
2304
2305 if (cnt == 1)
2306 xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2307 mailcount);
2308 else
2309 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2310 mailcount, filename);
2311 }
2312 else {
2313 char *type;
2314
2315 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime ||
2316 (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
2317 (loginsh && !new))
2318 continue;
2319 type = strsave(new ? CGETS(11, 6, "new ") : "");
2320 cleanup_push(type, xfree);
2321 if (cnt == 1)
2322 xprintf(CGETS(11, 5, "You have %smail.\n"), type);
2323 else
2324 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
2325 cleanup_until(type);
2326 }
2327 }
2328 chktim = t;
2329 }
2330
2331 /*
2332 * Extract a home directory from the password file
2333 * The argument points to a buffer where the name of the
2334 * user whose home directory is sought is currently.
2335 * We return home directory of the user, or NULL.
2336 */
2337 Char *
gethdir(const Char * home)2338 gethdir(const Char *home)
2339 {
2340 Char *h;
2341
2342 /*
2343 * Is it us?
2344 */
2345 if (*home == '\0') {
2346 if ((h = varval(STRhome)) != STRNULL)
2347 return Strsave(h);
2348 else
2349 return NULL;
2350 }
2351
2352 /*
2353 * Look in the cache
2354 */
2355 if ((h = gettilde(home)) == NULL)
2356 return NULL;
2357 else
2358 return Strsave(h);
2359 }
2360
2361 /*
2362 * Move the initial descriptors to their eventual
2363 * resting places, closing all other units.
2364 */
2365 void
initdesc(void)2366 initdesc(void)
2367 {
2368 #ifdef NLS_BUGS
2369 #ifdef NLS_CATALOGS
2370 nlsclose();
2371 #endif /* NLS_CATALOGS */
2372 #endif /* NLS_BUGS */
2373
2374
2375 didfds = 0; /* 0, 1, 2 aren't set up */
2376 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2377 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2378 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2379 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2380 #ifndef CLOSE_ON_EXEC
2381 didcch = 0; /* Havent closed for child */
2382 #endif /* CLOSE_ON_EXEC */
2383 if (SHDIAG >= 0)
2384 isdiagatty = isatty(SHDIAG);
2385 else
2386 isdiagatty = 0;
2387 if (SHDIAG >= 0)
2388 isoutatty = isatty(SHOUT);
2389 else
2390 isoutatty = 0;
2391 #ifdef NLS_BUGS
2392 #ifdef NLS_CATALOGS
2393 nlsinit();
2394 #endif /* NLS_CATALOGS */
2395 #endif /* NLS_BUGS */
2396 }
2397
2398
2399 void
2400 #ifdef PROF
done(int i)2401 done(int i)
2402 #else
2403 xexit(int i)
2404 #endif
2405 {
2406 #ifdef TESLA
2407 if (loginsh && do_logout) {
2408 /* this is to send hangup signal to the develcon */
2409 /* we toggle DTR. clear dtr - sleep 1 - set dtr */
2410 /* ioctl will return ENOTTY for pty's but we ignore it */
2411 /* exitstat will run after disconnect */
2412 /* we sleep for 2 seconds to let things happen in */
2413 /* .logout and rechist() */
2414 #ifdef TIOCCDTR
2415 (void) sleep(2);
2416 (void) ioctl(FSHTTY, TIOCCDTR, NULL);
2417 (void) sleep(1);
2418 (void) ioctl(FSHTTY, TIOCSDTR, NULL);
2419 #endif /* TIOCCDTR */
2420 }
2421 #endif /* TESLA */
2422
2423 {
2424 struct process *pp, *np;
2425 pid_t mypid = getpid();
2426 /* Kill all processes marked for hup'ing */
2427 for (pp = proclist.p_next; pp; pp = pp->p_next) {
2428 np = pp;
2429 do
2430 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp &&
2431 np->p_parentid == mypid) {
2432 if (killpg(np->p_jobid, SIGHUP) != -1) {
2433 /* In case the job was suspended... */
2434 #ifdef SIGCONT
2435 (void) killpg(np->p_jobid, SIGCONT);
2436 #endif
2437 break;
2438 }
2439 }
2440 while ((np = np->p_friends) != pp);
2441 }
2442 }
2443 untty();
2444 #ifdef NLS_CATALOGS
2445 /*
2446 * We need to call catclose, because SVR4 leaves symlinks behind otherwise
2447 * in the catalog directories. We cannot close on a vforked() child,
2448 * because messages will stop working on the parent too.
2449 */
2450 if (child == 0)
2451 nlsclose();
2452 #endif /* NLS_CATALOGS */
2453 #ifdef WINNT_NATIVE
2454 nt_cleanup();
2455 #endif /* WINNT_NATIVE */
2456 _exit(i);
2457 }
2458
2459 #ifndef _PATH_DEFPATH
2460 static Char **
defaultpath(void)2461 defaultpath(void)
2462 {
2463 char *ptr;
2464 Char **blk, **blkp;
2465 struct stat stb;
2466
2467 blkp = blk = xmalloc(sizeof(Char *) * 10);
2468
2469 #ifndef NODOT
2470 # ifndef DOTLAST
2471 *blkp++ = Strsave(STRdot);
2472 # endif
2473 #endif
2474
2475 #define DIRAPPEND(a) \
2476 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2477 *blkp++ = SAVE(ptr)
2478
2479 #ifdef _PATH_LOCAL
2480 DIRAPPEND(_PATH_LOCAL);
2481 #endif
2482
2483 #ifdef _PATH_USRUCB
2484 DIRAPPEND(_PATH_USRUCB);
2485 #endif
2486
2487 #ifdef _PATH_USRBSD
2488 DIRAPPEND(_PATH_USRBSD);
2489 #endif
2490
2491 #ifdef _PATH_BIN
2492 DIRAPPEND(_PATH_BIN);
2493 #endif
2494
2495 #ifdef _PATH_USRBIN
2496 DIRAPPEND(_PATH_USRBIN);
2497 #endif
2498
2499 #undef DIRAPPEND
2500
2501 #ifndef NODOT
2502 # ifdef DOTLAST
2503 *blkp++ = Strsave(STRdot);
2504 # endif
2505 #endif
2506 *blkp = NULL;
2507 return (blk);
2508 }
2509 #endif
2510
2511 static void
record(void)2512 record(void)
2513 {
2514 if (!fast) {
2515 recdirs(NULL, adrof(STRsavedirs) != NULL);
2516 rechist(NULL, adrof(STRsavehist) != NULL);
2517 }
2518 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */
2519 }
2520
2521 /*
2522 * Grab the tty repeatedly, and give up if we are not in the correct
2523 * tty process group.
2524 */
2525 int
grabpgrp(int fd,pid_t desired)2526 grabpgrp(int fd, pid_t desired)
2527 {
2528 struct sigaction old;
2529 pid_t pgrp;
2530 size_t i;
2531
2532 for (i = 0; i < 100; i++) {
2533 if ((pgrp = tcgetpgrp(fd)) == -1)
2534 return -1;
2535 if (pgrp == desired)
2536 return 0;
2537 (void)sigaction(SIGTTIN, NULL, &old);
2538 (void)signal(SIGTTIN, SIG_DFL);
2539 (void)kill(0, SIGTTIN);
2540 (void)sigaction(SIGTTIN, &old, NULL);
2541 }
2542 errno = EPERM;
2543 return -1;
2544 }
2545