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 setcopy(STRstatus, STR0, VAR_READWRITE);
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 else
772 /* Importpath() allocates memory for the path, and the
773 * returned pointer from SAVE() was discarded, so
774 * this was a memory leak.. (sg)
775 *
776 * importpath(SAVE(tcp));
777 */
778 importpath(str2short(tcp));
779
780
781 {
782 /* If the SHELL environment variable ends with "tcsh", set
783 * STRshell to the same path. This is to facilitate using
784 * the executable in environments where the compiled-in
785 * default isn't appropriate (sg).
786 */
787
788 size_t sh_len = 0;
789
790 if ((tcp = getenv("SHELL")) != NULL) {
791 sh_len = strlen(tcp);
792 if ((sh_len >= 5 && strcmp(tcp + (sh_len - 5), "/tcsh") == 0) ||
793 (!tcsh && sh_len >= 4 && strcmp(tcp + (sh_len - 4), "/csh") == 0))
794 setv(STRshell, quote(SAVE(tcp)), VAR_READWRITE);
795 else
796 sh_len = 0;
797 }
798 if (sh_len == 0)
799 setcopy(STRshell, STR_SHELLPATH, VAR_READWRITE);
800 }
801
802 #ifdef _OSD_POSIX /* BS2000 needs this variable set to "SHELL" */
803 if ((tcp = getenv("PROGRAM_ENVIRONMENT")) == NULL)
804 tcp = "SHELL";
805 tsetenv(STRPROGRAM_ENVIRONMENT, quote(str2short(tcp)));
806 #endif /* _OSD_POSIX */
807
808 #ifdef COLOR_LS_F
809 if ((tcp = getenv("LS_COLORS")) != NULL)
810 parseLS_COLORS(str2short(tcp));
811 if ((tcp = getenv("LSCOLORS")) != NULL)
812 parseLSCOLORS(str2short(tcp));
813 #endif /* COLOR_LS_F */
814
815 mainpid = getpid();
816 doldol = putn((tcsh_number_t)mainpid); /* For $$ */
817 #ifdef WINNT_NATIVE
818 {
819 char *tmp;
820 Char *tmp2;
821 if ((tmp = getenv("TMP")) != NULL) {
822 tmp = xasprintf("%s/%s", tmp, "sh");
823 tmp2 = SAVE(tmp);
824 xfree(tmp);
825 }
826 else {
827 tmp2 = SAVE("");
828 }
829 shtemp = Strspl(tmp2, doldol); /* For << */
830 xfree(tmp2);
831 }
832 #else /* !WINNT_NATIVE */
833 #ifdef HAVE_MKSTEMP
834 {
835 const char *tmpdir = getenv ("TMPDIR");
836 if (!tmpdir)
837 tmpdir = "/tmp";
838 shtemp = Strspl(SAVE(tmpdir), SAVE("/sh" TMP_TEMPLATE)); /* For << */
839 }
840 #else /* !HAVE_MKSTEMP */
841 shtemp = Strspl(STRtmpsh, doldol); /* For << */
842 #endif /* HAVE_MKSTEMP */
843 #endif /* WINNT_NATIVE */
844
845 /*
846 * Record the interrupt states from the parent process. If the parent is
847 * non-interruptible our hand must be forced or we (and our children) won't
848 * be either. Our children inherit termination from our parent. We catch it
849 * only if we are the login shell.
850 */
851 sigaction(SIGINT, NULL, &parintr);
852 sigaction(SIGTERM, NULL, &parterm);
853
854
855 #ifdef TCF
856 /* Enable process migration on ourselves and our progeny */
857 (void) signal(SIGMIGRATE, SIG_DFL);
858 #endif /* TCF */
859
860 /*
861 * dspkanji/dspmbyte autosetting
862 */
863 /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
864 #if defined(DSPMBYTE)
865 #if defined(NLS) && defined(LC_CTYPE)
866 if (((tcp = setlocale(LC_CTYPE, NULL)) != NULL || (tcp = getenv("LANG")) != NULL) && !adrof(CHECK_MBYTEVAR))
867 #else
868 if ((tcp = getenv("LANG")) != NULL && !adrof(CHECK_MBYTEVAR))
869 #endif
870 {
871 autoset_dspmbyte(str2short(tcp));
872 }
873 #if defined(WINNT_NATIVE)
874 else if (!adrof(CHECK_MBYTEVAR))
875 nt_autoset_dspmbyte();
876 #endif /* WINNT_NATIVE */
877 #endif
878 #if defined(AUTOSET_KANJI)
879 # if defined(NLS) && defined(LC_CTYPE)
880 if (setlocale(LC_CTYPE, NULL) != NULL || getenv("LANG") != NULL)
881 # else
882 if (getenv("LANG") != NULL)
883 # endif
884 autoset_kanji();
885 #endif /* AUTOSET_KANJI */
886 fix_version(); /* publish the shell version */
887
888 if (argc > 1 && strcmp(argv[1], "--version") == 0) {
889 xprintf("%S\n", varval(STRversion));
890 xexit(0);
891 }
892 if (argc > 1 && strcmp(argv[1], "--help") == 0) {
893 xprintf("%S\n\n", varval(STRversion));
894 xprintf("%s", CGETS(11, 8, HELP_STRING));
895 xexit(0);
896 }
897 /*
898 * Process the arguments.
899 *
900 * Note that processing of -v/-x is actually delayed till after script
901 * processing.
902 *
903 * We set the first character of our name to be '-' if we are a shell
904 * running interruptible commands. Many programs which examine ps'es
905 * use this to filter such shells out.
906 */
907 argc--, tempv++;
908 while (argc > 0 && (tcp = tempv[0])[0] == '-' &&
909 *++tcp != '\0' && !batch) {
910 do
911 switch (*tcp++) {
912
913 case 0: /* - Interruptible, no prompt */
914 prompt = 0;
915 setintr = 1;
916 nofile = 1;
917 break;
918
919 case 'b': /* -b Next arg is input file */
920 batch = 1;
921 break;
922
923 case 'c': /* -c Command input from arg */
924 if (argc == 1)
925 xexit(0);
926 argc--, tempv++;
927 #ifdef M_XENIX
928 /* Xenix Vi bug:
929 it relies on a 7 bit environment (/bin/sh), so it
930 pass ascii arguments with the 8th bit set */
931 if (!strcmp(argv[0], "sh"))
932 {
933 char *p;
934
935 for (p = tempv[0]; *p; ++p)
936 *p &= ASCII;
937 }
938 #endif
939 targinp = tempv[0];
940 prompt = 0;
941 nofile = 1;
942 break;
943 case 'd': /* -d Load directory stack from file */
944 rdirs = 1;
945 break;
946
947 #ifdef apollo
948 case 'D': /* -D Define environment variable */
949 {
950 Char *dp;
951
952 cp = str2short(tcp);
953 if (dp = Strchr(cp, '=')) {
954 *dp++ = '\0';
955 tsetenv(cp, dp);
956 }
957 else
958 tsetenv(cp, STRNULL);
959 }
960 *tcp = '\0'; /* done with this argument */
961 break;
962 #endif /* apollo */
963
964 case 'e': /* -e Exit on any error */
965 exiterr = 1;
966 break;
967
968 case 'f': /* -f Fast start */
969 fast = 1;
970 break;
971
972 case 'i': /* -i Interactive, even if !intty */
973 intact = 1;
974 nofile = 1;
975 break;
976
977 case 'm': /* -m read .cshrc (from su) */
978 mflag = 1;
979 break;
980
981 case 'n': /* -n Don't execute */
982 noexec = 1;
983 break;
984
985 case 'q': /* -q (Undoc'd) ... die on quit */
986 quitit = 1;
987 break;
988
989 case 's': /* -s Read from std input */
990 nofile = 1;
991 break;
992
993 case 't': /* -t Read one line from input */
994 onelflg = 2;
995 prompt = 0;
996 nofile = 1;
997 break;
998
999 case 'v': /* -v Echo hist expanded input */
1000 nverbose = 1; /* ... later */
1001 break;
1002
1003 case 'x': /* -x Echo just before execution */
1004 nexececho = 1; /* ... later */
1005 break;
1006
1007 case 'V': /* -V Echo hist expanded input */
1008 setNS(STRverbose); /* NOW! */
1009 break;
1010
1011 case 'X': /* -X Echo just before execution */
1012 setNS(STRecho); /* NOW! */
1013 break;
1014
1015 case 'F':
1016 /*
1017 * This will cause children to be created using fork instead of
1018 * vfork.
1019 */
1020 use_fork = 1;
1021 break;
1022
1023 case ' ':
1024 case '\t':
1025 case '\r':
1026 case '\n':
1027 /*
1028 * for O/S's that don't do the argument parsing right in
1029 * "#!/foo -f " scripts
1030 */
1031 break;
1032
1033 default: /* Unknown command option */
1034 exiterr = 1;
1035 stderror(ERR_TCSHUSAGE, tcp-1, progname);
1036 break;
1037
1038 } while (*tcp);
1039 tempv++, argc--;
1040 }
1041
1042 if (quitit) /* With all due haste, for debugging */
1043 (void) signal(SIGQUIT, SIG_DFL);
1044
1045 /*
1046 * Unless prevented by -, -c, -i, -s, or -t, if there are remaining
1047 * arguments the first of them is the name of a shell file from which to
1048 * read commands.
1049 */
1050 if (nofile == 0 && argc > 0) {
1051 nofile = xopen(tempv[0], O_RDONLY|O_LARGEFILE);
1052 if (nofile < 0) {
1053 child = 1; /* So this ... */
1054 /* ... doesn't return */
1055 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1056 }
1057 xfree(ffile);
1058 dolzero = 1;
1059 ffile = SAVE(tempv[0]);
1060 /*
1061 * Replace FSHIN. Handle /dev/std{in,out,err} specially
1062 * since once they are closed we cannot open them again.
1063 * In that case we use our own saved descriptors
1064 */
1065 if ((SHIN = dmove(nofile, FSHIN)) < 0)
1066 switch(nofile) {
1067 case 0:
1068 SHIN = FSHIN;
1069 break;
1070 case 1:
1071 SHIN = FSHOUT;
1072 break;
1073 case 2:
1074 SHIN = FSHDIAG;
1075 break;
1076 default:
1077 stderror(ERR_SYSTEM, tempv[0], strerror(errno));
1078 break;
1079 }
1080 (void) close_on_exec(SHIN, 1);
1081 prompt = 0;
1082 /* argc not used any more */ tempv++;
1083 }
1084
1085 /*
1086 * Call to closem() used to be part of initdesc(). Now called below where
1087 * the script name argument has become stdin. Kernel may have used a file
1088 * descriptor to hold the name of the script (setuid case) and this name
1089 * mustn't be lost by closing the fd too soon.
1090 */
1091 closem();
1092
1093 /*
1094 * Consider input a tty if it really is or we are interactive. but not for
1095 * editing (christos)
1096 */
1097 if (!(intty = isatty(SHIN))) {
1098 if (adrof(STRedit))
1099 unsetv(STRedit);
1100 editing = 0;
1101 }
1102 intty |= intact;
1103 #ifndef convex
1104 if (intty || (intact && isatty(SHOUT))) {
1105 if (!batch && (uid != euid || gid != egid)) {
1106 errno = EACCES;
1107 child = 1; /* So this ... */
1108 /* ... doesn't return */
1109 stderror(ERR_SYSTEM, progname, strerror(errno));
1110 }
1111 }
1112 #endif /* convex */
1113 isoutatty = isatty(SHOUT);
1114 isdiagatty = isatty(SHDIAG);
1115 /*
1116 * Decide whether we should play with signals or not. If we are explicitly
1117 * told (via -i, or -) or we are a login shell (arg0 starts with -) or the
1118 * input and output are both the ttys("csh", or "csh</dev/ttyx>/dev/ttyx")
1119 * Note that in only the login shell is it likely that parent may have set
1120 * signals to be ignored
1121 */
1122 if (loginsh || intact || (intty && isatty(SHOUT)))
1123 setintr = 1;
1124 settell();
1125 /*
1126 * Save the remaining arguments in argv.
1127 */
1128 setq(STRargv, blk2short(tempv), &shvhed, VAR_READWRITE);
1129
1130 /*
1131 * Set up the prompt.
1132 */
1133 if (prompt) {
1134 setcopy(STRprompt, STRdefprompt, VAR_READWRITE);
1135 /* that's a meta-questionmark */
1136 setcopy(STRprompt2, STRmquestion, VAR_READWRITE);
1137 setcopy(STRprompt3, STRKCORRECT, VAR_READWRITE);
1138 }
1139
1140 /*
1141 * If we are an interactive shell, then start fiddling with the signals;
1142 * this is a tricky game.
1143 */
1144 shpgrp = mygetpgrp();
1145 opgrp = tpgrp = -1;
1146 if (setintr) {
1147 struct sigaction osig;
1148
1149 **argv = '-';
1150 if (!quitit) /* Wary! */
1151 (void) signal(SIGQUIT, SIG_IGN);
1152 pintr_disabled = 1;
1153 sigset_interrupting(SIGINT, queue_pintr);
1154 (void) signal(SIGTERM, SIG_IGN);
1155
1156 /*
1157 * No reason I can see not to save history on all these events..
1158 * Most usual occurrence is in a window system, where we're not a login
1159 * shell, but might as well be... (sg)
1160 * But there might be races when lots of shells exit together...
1161 * [this is also incompatible].
1162 * We have to be mre careful here. If the parent wants to
1163 * ignore the signals then we leave them untouched...
1164 * We also only setup the handlers for shells that are trully
1165 * interactive.
1166 */
1167 sigaction(SIGHUP, NULL, &osig);
1168 if (loginsh || osig.sa_handler != SIG_IGN)
1169 /* exit processing on HUP */
1170 sigset_interrupting(SIGHUP, queue_phup);
1171 #ifdef SIGXCPU
1172 sigaction(SIGXCPU, NULL, &osig);
1173 if (loginsh || osig.sa_handler != SIG_IGN)
1174 /* exit processing on XCPU */
1175 sigset_interrupting(SIGXCPU, queue_phup);
1176 #endif
1177 #ifdef SIGXFSZ
1178 sigaction(SIGXFSZ, NULL, &osig);
1179 if (loginsh || osig.sa_handler != SIG_IGN)
1180 /* exit processing on XFSZ */
1181 sigset_interrupting(SIGXFSZ, queue_phup);
1182 #endif
1183
1184 if (quitit == 0 && targinp == 0) {
1185 #ifdef SIGTSTP
1186 (void) signal(SIGTSTP, SIG_IGN);
1187 #endif
1188 #ifdef SIGTTIN
1189 (void) signal(SIGTTIN, SIG_IGN);
1190 #endif
1191 #ifdef SIGTTOU
1192 (void) signal(SIGTTOU, SIG_IGN);
1193 #endif
1194 /*
1195 * Wait till in foreground, in case someone stupidly runs csh &
1196 * dont want to try to grab away the tty.
1197 */
1198 if (isatty(FSHDIAG))
1199 f = FSHDIAG;
1200 else if (isatty(FSHOUT))
1201 f = FSHOUT;
1202 else if (isatty(OLDSTD))
1203 f = OLDSTD;
1204 else
1205 f = -1;
1206
1207 #ifdef NeXT
1208 /* NeXT 2.0 /usr/etc/rlogind, does not set our process group! */
1209 if (f != -1 && shpgrp == 0) {
1210 shpgrp = getpid();
1211 (void) setpgid(0, shpgrp);
1212 (void) tcsetpgrp(f, shpgrp);
1213 }
1214 #endif /* NeXT */
1215 #ifdef BSDJOBS /* if we have tty job control */
1216 if (f != -1 && grabpgrp(f, shpgrp) != -1) {
1217 /*
1218 * Thanks to Matt Day for the POSIX references, and to
1219 * Paul Close for the SGI clarification.
1220 */
1221 if (setdisc(f) != -1) {
1222 opgrp = shpgrp;
1223 shpgrp = getpid();
1224 tpgrp = shpgrp;
1225 if (tcsetpgrp(f, shpgrp) == -1) {
1226 /*
1227 * On hpux 7.03 this fails with EPERM. This happens on
1228 * the 800 when opgrp != shpgrp at this point. (we were
1229 * forked from a non job control shell)
1230 * POSIX 7.2.4, says we failed because the process
1231 * group specified did not belong to a process
1232 * in the same session with the tty. So we set our
1233 * process group and try again.
1234 */
1235 if (setpgid(0, shpgrp) == -1) {
1236 xprintf("setpgid:");
1237 goto notty;
1238 }
1239 if (tcsetpgrp(f, shpgrp) == -1) {
1240 xprintf("tcsetpgrp:");
1241 goto notty;
1242 }
1243 }
1244 /*
1245 * We check the process group now. If it is the same, then
1246 * we don't need to set it again. On hpux 7.0 on the 300's
1247 * if we set it again it fails with EPERM. This is the
1248 * correct behavior according to POSIX 4.3.3 if the process
1249 * was a session leader .
1250 */
1251 else if (shpgrp != mygetpgrp()) {
1252 if (setpgid(0, shpgrp) == -1) {
1253 xprintf("setpgid:");
1254 goto notty;
1255 }
1256 }
1257 #ifdef IRIS4D
1258 /*
1259 * But on irix 3.3 we need to set it again, even if it is
1260 * the same. We do that to tell the system that we
1261 * need BSD process group compatibility.
1262 */
1263 else
1264 (void) setpgid(0, shpgrp);
1265 #endif
1266 (void) close_on_exec(dcopy(f, FSHTTY), 1);
1267 }
1268 else
1269 tpgrp = -1;
1270 }
1271 if (tpgrp == -1) {
1272 notty:
1273 xprintf(CGETS(11, 1, "Warning: no access to tty (%s).\n"),
1274 strerror(errno));
1275 xprintf("%s",
1276 CGETS(11, 2, "Thus no job control in this shell.\n"));
1277 /*
1278 * Fix from:Sakari Jalovaara <sja@sirius.hut.fi> if we don't
1279 * have access to tty, disable editing too
1280 */
1281 if (adrof(STRedit))
1282 unsetv(STRedit);
1283 editing = 0;
1284 }
1285 #else /* BSDJOBS */ /* don't have job control, so frotz it */
1286 tpgrp = -1;
1287 #endif /* BSDJOBS */
1288 }
1289 }
1290 if (setintr == 0 && parintr.sa_handler == SIG_DFL)
1291 setintr = 1;
1292
1293 /*
1294 * SVR4 doesn't send a SIGCHLD when a child is stopped or continued if the
1295 * handler is installed with signal(2) or sigset(2). sigaction(2) must
1296 * be used instead.
1297 *
1298 * David Dawes (dawes@physics.su.oz.au) Sept 1991
1299 */
1300 sigset_interrupting(SIGCHLD, queue_pchild);
1301
1302 if (intty && !targinp)
1303 (void) ed_Setup(editing);/* Get the tty state, and set defaults */
1304 /* Only alter the tty state if editing */
1305
1306 /*
1307 * Set an exit here in case of an interrupt or error reading the shell
1308 * start-up scripts.
1309 */
1310 osetintr = setintr;
1311 oparintr = parintr;
1312 (void)cleanup_push_mark(); /* There is no outer handler */
1313 if (setexit() != 0) /* PWP */
1314 reenter = 1;
1315 else
1316 reenter = 0;
1317 exitset++;
1318 haderr = 0; /* In case second time through */
1319 if (!fast && reenter == 0) {
1320 /* Will have varval(STRhome) here because set fast if don't */
1321 {
1322 pintr_disabled++;
1323 cleanup_push(&pintr_disabled, disabled_cleanup);
1324 setintr = 0;/*FIXRESET:cleanup*/
1325 /* onintr in /etc/ files has no effect */
1326 parintr.sa_handler = SIG_IGN;/*FIXRESET: cleanup*/
1327 #ifdef LOGINFIRST
1328 #ifdef _PATH_DOTLOGIN
1329 if (loginsh)
1330 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1331 #endif
1332 #endif
1333
1334 #ifdef _PATH_DOTCSHRC
1335 (void) srcfile(_PATH_DOTCSHRC, 0, 0, NULL);
1336 #endif
1337 if (!targinp && !onelflg && !havhash)
1338 dohash(NULL,NULL);
1339 #ifndef LOGINFIRST
1340 #ifdef _PATH_DOTLOGIN
1341 if (loginsh)
1342 (void) srcfile(_PATH_DOTLOGIN, 0, 0, NULL);
1343 #endif
1344 #endif
1345 cleanup_until(&pintr_disabled);
1346 setintr = osetintr;
1347 parintr = oparintr;
1348 }
1349 #ifdef LOGINFIRST
1350 if (loginsh)
1351 (void) srccat(varval(STRhome), STRsldotlogin);
1352 #endif
1353 /* upward compat. */
1354 if (!srccat(varval(STRhome), STRsldottcshrc))
1355 (void) srccat(varval(STRhome), STRsldotcshrc);
1356
1357 if (!targinp && !onelflg && !havhash)
1358 dohash(NULL,NULL);
1359
1360 /*
1361 * Source history before .login so that it is available in .login
1362 */
1363 loadhist(NULL, 0);
1364 #ifndef LOGINFIRST
1365 if (loginsh)
1366 (void) srccat(varval(STRhome), STRsldotlogin);
1367 #endif
1368 if (loginsh || rdirs)
1369 loaddirs(NULL);
1370 }
1371 /* Reset interrupt flag */
1372 setintr = osetintr;
1373 parintr = oparintr;
1374 exitset--;
1375
1376 /* Initing AFTER .cshrc is the Right Way */
1377 if (intty && !targinp) { /* PWP setup stuff */
1378 ed_Init(); /* init the new line editor */
1379 #ifdef SIG_WINDOW
1380 check_window_size(1); /* mung environment */
1381 #endif /* SIG_WINDOW */
1382 }
1383
1384 /*
1385 * Now are ready for the -v and -x flags
1386 */
1387 if (nverbose)
1388 setNS(STRverbose);
1389 if (nexececho)
1390 setNS(STRecho);
1391
1392
1393 if (targinp) {
1394 /* If this -c command caused an error before, skip processing */
1395 if (reenter && arginp) {
1396 exitcode = 1;
1397 goto done;
1398 }
1399
1400 arginp = SAVE(targinp);
1401 /*
1402 * we put the command into a variable
1403 */
1404 if (arginp != NULL)
1405 setv(STRcommand, quote(Strsave(arginp)), VAR_READWRITE);
1406
1407 /*
1408 * * Give an error on -c arguments that end in * backslash to
1409 * ensure that you don't make * nonportable csh scripts.
1410 */
1411 {
1412 int count;
1413
1414 cp = Strend(arginp);
1415 count = 0;
1416 while (cp > arginp && *--cp == '\\')
1417 ++count;
1418 if ((count & 1) != 0) {
1419 exiterr = 1;
1420 stderror(ERR_ARGC);
1421 }
1422 }
1423 }
1424 /*
1425 * All the rest of the world is inside this call. The argument to process
1426 * indicates whether it should catch "error unwinds". Thus if we are a
1427 * interactive shell our call here will never return by being blown past on
1428 * an error.
1429 */
1430 process(setintr);
1431
1432 done:
1433 /*
1434 * Mop-up.
1435 */
1436 /* Take care of these (especially HUP) here instead of inside flush. */
1437 handle_pending_signals();
1438 if (intty) {
1439 if (loginsh) {
1440 xprintf("logout\n");
1441 xclose(SHIN);
1442 child = 1;
1443 #ifdef TESLA
1444 do_logout = 1;
1445 #endif /* TESLA */
1446 goodbye(NULL, NULL);
1447 }
1448 else {
1449 xprintf("exit\n");
1450 }
1451 }
1452 record();
1453 exitstat();
1454 return exitcode;
1455 }
1456
1457 void
untty(void)1458 untty(void)
1459 {
1460 #ifdef BSDJOBS
1461 if (tpgrp > 0 && opgrp != shpgrp) {
1462 (void) setpgid(0, opgrp);
1463 (void) tcsetpgrp(FSHTTY, opgrp);
1464 (void) resetdisc(FSHTTY);
1465 }
1466 #endif /* BSDJOBS */
1467 }
1468
1469 void
importpath(Char * cp)1470 importpath(Char *cp)
1471 {
1472 size_t i = 0;
1473 Char *dp;
1474 Char **pv;
1475 int c;
1476
1477 for (dp = cp; *dp; dp++)
1478 if (*dp == PATHSEP)
1479 i++;
1480 /*
1481 * i+2 where i is the number of colons in the path. There are i+1
1482 * directories in the path plus we need room for a zero terminator.
1483 */
1484 pv = xcalloc(i + 2, sizeof(Char *));
1485 dp = cp;
1486 i = 0;
1487 if (*dp)
1488 for (;;) {
1489 if ((c = *dp) == PATHSEP || c == 0) {
1490 *dp = 0;
1491 pv[i++] = Strsave(*cp ? cp : STRdot);
1492 if (c) {
1493 cp = dp + 1;
1494 *dp = PATHSEP;
1495 }
1496 else
1497 break;
1498 }
1499 #ifdef WINNT_NATIVE
1500 else if (*dp == '\\')
1501 *dp = '/';
1502 #endif /* WINNT_NATIVE */
1503 dp++;
1504 }
1505 pv[i] = 0;
1506 cleanup_push(pv, blk_cleanup);
1507 setq(STRpath, pv, &shvhed, VAR_READWRITE);
1508 cleanup_ignore(pv);
1509 cleanup_until(pv);
1510 }
1511
1512 /*
1513 * Source to the file which is the catenation of the argument names.
1514 */
1515 static int
srccat(Char * cp,Char * dp)1516 srccat(Char *cp, Char *dp)
1517 {
1518 if (cp[0] == '/' && cp[1] == '\0')
1519 return srcfile(short2str(dp), (mflag ? 0 : 1), 0, NULL);
1520 else {
1521 Char *ep;
1522 char *ptr;
1523 int rv;
1524
1525 #ifdef WINNT_NATIVE
1526 ep = Strend(cp);
1527 if (ep != cp && ep[-1] == '/' && dp[0] == '/') /* silly win95 */
1528 dp++;
1529 #endif /* WINNT_NATIVE */
1530
1531 ep = Strspl(cp, dp);
1532 cleanup_push(ep, xfree);
1533 ptr = short2str(ep);
1534
1535 rv = srcfile(ptr, (mflag ? 0 : 1), 0, NULL);
1536 cleanup_until(ep);
1537 return rv;
1538 }
1539 }
1540
1541 /*
1542 * Source to a file putting the file descriptor in a safe place (> 2).
1543 */
1544 #ifndef WINNT_NATIVE
1545 static int
1546 #else
1547 int
1548 #endif /*WINNT_NATIVE*/
srcfile(const char * f,int onlyown,int flag,Char ** av)1549 srcfile(const char *f, int onlyown, int flag, Char **av)
1550 {
1551 int unit;
1552
1553 if ((unit = xopen(f, O_RDONLY|O_LARGEFILE)) == -1)
1554 return 0;
1555 cleanup_push(&unit, open_cleanup);
1556 unit = dmove(unit, -1);
1557 cleanup_ignore(&unit);
1558 cleanup_until(&unit);
1559
1560 (void) close_on_exec(unit, 1);
1561 srcunit(unit, onlyown, flag, av);
1562 return 1;
1563 }
1564
1565
1566 /*
1567 * Save the shell state, and establish new argument vector, and new input
1568 * fd.
1569 */
1570 static void
st_save(struct saved_state * st,int unit,int hflg,Char ** al,Char ** av)1571 st_save(struct saved_state *st, int unit, int hflg, Char **al, Char **av)
1572 {
1573 st->insource = insource;
1574 st->SHIN = SHIN;
1575 /* Want to preserve the meaning of "source file >output".
1576 * Save old descriptors, move new 0,1,2 to safe places and assign
1577 * them to SH* and let process() redo 0,1,2 from them.
1578 *
1579 * The macro returns true if d1 and d2 are good and they point to
1580 * different things. If you don't avoid saving duplicate
1581 * descriptors, you really limit the depth of "source" recursion
1582 * you can do because of all the open file descriptors. -IAN!
1583 */
1584 #define NEED_SAVE_FD(d1,d2) \
1585 (fstat(d1, &s1) != -1 && fstat(d2, &s2) != -1 \
1586 && (s1.st_ino != s2.st_ino || s1.st_dev != s2.st_dev) )
1587
1588 st->OLDSTD = st->SHOUT = st->SHDIAG = -1;/* test later to restore these */
1589 if (didfds) {
1590 struct stat s1, s2;
1591 if (NEED_SAVE_FD(0,OLDSTD)) {
1592 st->OLDSTD = OLDSTD;
1593 OLDSTD = dmove(0, -1);
1594 (void)close_on_exec(OLDSTD, 1);
1595 }
1596 if (NEED_SAVE_FD(1,SHOUT)) {
1597 st->SHOUT = SHOUT;
1598 SHOUT = dmove(1, -1);
1599 (void)close_on_exec(SHOUT, 1);
1600 }
1601 if (NEED_SAVE_FD(2,SHDIAG)) {
1602 st->SHDIAG = SHDIAG;
1603 SHDIAG = dmove(2, -1);
1604 (void)close_on_exec(SHDIAG, 1);
1605 }
1606 donefds();
1607 }
1608
1609 st->intty = intty;
1610 st->whyles = whyles;
1611 st->gointr = gointr;
1612 st->arginp = arginp;
1613 st->evalp = evalp;
1614 st->evalvec = evalvec;
1615 st->alvecp = alvecp;
1616 st->alvec = alvec;
1617 st->onelflg = onelflg;
1618 st->enterhist = enterhist;
1619 st->justpr = justpr;
1620 if (hflg)
1621 st->HIST = HIST;
1622 else
1623 st->HIST = '\0';
1624 st->cantell = cantell;
1625 cpybin(st->B, B);
1626
1627 /*
1628 * we can now pass arguments to source.
1629 * For compatibility we do that only if arguments were really
1630 * passed, otherwise we keep the old, global $argv like before.
1631 */
1632 if (av != NULL && *av != NULL) {
1633 struct varent *vp;
1634 if ((vp = adrof(STRargv)) != NULL && vp->vec != NULL)
1635 st->argv = saveblk(vp->vec);
1636 else
1637 st->argv = NULL;
1638 setq(STRargv, saveblk(av), &shvhed, VAR_READWRITE);
1639 }
1640 else
1641 st->argv = NULL;
1642 st->av = av;
1643
1644 SHIN = unit; /* Do this first */
1645
1646 /* Establish new input arena */
1647 {
1648 fbuf = NULL;
1649 fseekp = feobp = fblocks = 0;
1650 settell();
1651 }
1652
1653 arginp = 0;
1654 onelflg = 0;
1655 intty = isatty(SHIN);
1656 whyles = 0;
1657 gointr = 0;
1658 evalvec = 0;
1659 evalp = 0;
1660 alvec = al;
1661 alvecp = 0;
1662 enterhist = hflg;
1663 if (enterhist)
1664 HIST = '\0';
1665 insource = 1;
1666 }
1667
1668
1669 /*
1670 * Restore the shell to a saved state
1671 */
1672 static void
st_restore(void * xst)1673 st_restore(void *xst)
1674 {
1675 struct saved_state *st;
1676
1677 st = xst;
1678 if (st->SHIN == -1)
1679 return;
1680
1681 /* Reset input arena */
1682 {
1683 int i;
1684 Char** nfbuf = fbuf;
1685 int nfblocks = fblocks;
1686
1687 fblocks = 0;
1688 fbuf = NULL;
1689 for (i = 0; i < nfblocks; i++)
1690 xfree(nfbuf[i]);
1691 xfree(nfbuf);
1692 }
1693 cpybin(B, st->B);
1694
1695 xclose(SHIN);
1696
1697 insource = st->insource;
1698 SHIN = st->SHIN;
1699 if (st->OLDSTD != -1)
1700 xclose(OLDSTD), OLDSTD = st->OLDSTD;
1701 if (st->SHOUT != -1)
1702 xclose(SHOUT), SHOUT = st->SHOUT;
1703 if (st->SHDIAG != -1)
1704 xclose(SHDIAG), SHDIAG = st->SHDIAG;
1705 arginp = st->arginp;
1706 onelflg = st->onelflg;
1707 evalp = st->evalp;
1708 evalvec = st->evalvec;
1709 alvecp = st->alvecp;
1710 alvec = st->alvec;
1711 intty = st->intty;
1712 whyles = st->whyles;
1713 gointr = st->gointr;
1714 if (st->HIST != '\0')
1715 HIST = st->HIST;
1716 enterhist = st->enterhist;
1717 cantell = st->cantell;
1718 justpr = st->justpr;
1719
1720 if (st->argv != NULL)
1721 setq(STRargv, st->argv, &shvhed, VAR_READWRITE);
1722 else if (st->av != NULL && *st->av != NULL && adrof(STRargv) != NULL)
1723 unsetv(STRargv);
1724 }
1725
1726 /*
1727 * Source to a unit. If onlyown it must be our file or our group or
1728 * we don't chance it. This occurs on ".cshrc"s and the like.
1729 */
1730 static void
srcunit(int unit,int onlyown,int hflg,Char ** av)1731 srcunit(int unit, int onlyown, int hflg, Char **av)
1732 {
1733 struct saved_state st;
1734
1735 st.SHIN = -1; /* st_restore checks this */
1736
1737 if (unit < 0)
1738 return;
1739
1740 if (onlyown) {
1741 struct stat stb;
1742
1743 if (fstat(unit, &stb) < 0) {
1744 xclose(unit);
1745 return;
1746 }
1747 }
1748
1749 /* Does nothing before st_save() because st.SHIN == -1 */
1750 cleanup_push(&st, st_restore);
1751 if (setintr) {
1752 pintr_disabled++;
1753 cleanup_push(&pintr_disabled, disabled_cleanup);
1754 }
1755
1756 /* Save the current state and move us to a new state */
1757 st_save(&st, unit, hflg, NULL, av);
1758
1759 /*
1760 * Now if we are allowing commands to be interrupted, we let ourselves be
1761 * interrupted.
1762 */
1763 if (setintr) {
1764 cleanup_until(&pintr_disabled);
1765 pintr_disabled++;
1766 cleanup_push(&pintr_disabled, disabled_cleanup);
1767 }
1768
1769 process(0); /* 0 -> blow away on errors */
1770
1771 /* Restore the old state */
1772 cleanup_until(&st);
1773 }
1774
1775
1776 /*ARGSUSED*/
1777 void
goodbye(Char ** v,struct command * c)1778 goodbye(Char **v, struct command *c)
1779 {
1780 USE(v);
1781 USE(c);
1782 record();
1783
1784 if (loginsh) {
1785 size_t omark;
1786 sigset_t set;
1787
1788 sigemptyset(&set);
1789 signal(SIGQUIT, SIG_IGN);
1790 sigaddset(&set, SIGQUIT);
1791 sigprocmask(SIG_UNBLOCK, &set, NULL);
1792 signal(SIGINT, SIG_IGN);
1793 sigaddset(&set, SIGINT);
1794 signal(SIGTERM, SIG_IGN);
1795 sigaddset(&set, SIGTERM);
1796 signal(SIGHUP, SIG_IGN);
1797 sigaddset(&set, SIGHUP);
1798 sigprocmask(SIG_UNBLOCK, &set, NULL);
1799 phup_disabled = 1;
1800 setintr = 0; /* No interrupts after "logout" */
1801 /* Trap errors inside .logout */
1802 omark = cleanup_push_mark();
1803 if (setexit() == 0) {
1804 if (!(adrof(STRlogout)))
1805 setcopy(STRlogout, STRnormal, VAR_READWRITE);
1806 #ifdef _PATH_DOTLOGOUT
1807 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1808 #endif
1809 if (adrof(STRhome))
1810 (void) srccat(varval(STRhome), STRsldtlogout);
1811 #ifdef TESLA
1812 do_logout = 1;
1813 #endif /* TESLA */
1814 }
1815 cleanup_pop_mark(omark);
1816 }
1817 exitstat();
1818 }
1819
1820 void
exitstat(void)1821 exitstat(void)
1822 {
1823 #ifdef PROF
1824 _mcleanup();
1825 #endif
1826 /*
1827 * Note that if STATUS is corrupted (i.e. getn bombs) then error will exit
1828 * directly because we poke child here. Otherwise we might continue
1829 * unwarrantedly (sic).
1830 */
1831 child = 1;
1832
1833 xexit(getn(varval(STRstatus)));
1834 }
1835
1836 /*
1837 * in the event of a HUP we want to save the history
1838 */
1839 void
phup(void)1840 phup(void)
1841 {
1842 static int again = 0;
1843 if (again++)
1844 return;
1845
1846 if (loginsh) {
1847 setcopy(STRlogout, STRhangup, VAR_READWRITE);
1848 #ifdef _PATH_DOTLOGOUT
1849 (void) srcfile(_PATH_DOTLOGOUT, 0, 0, NULL);
1850 #endif
1851 if (adrof(STRhome))
1852 (void) srccat(varval(STRhome), STRsldtlogout);
1853 }
1854
1855 record();
1856
1857 #ifdef POSIXJOBS
1858 /*
1859 * We kill the last foreground process group. It then becomes
1860 * responsible to propagate the SIGHUP to its progeny.
1861 */
1862 {
1863 struct process *pp, *np;
1864
1865 for (pp = proclist.p_next; pp; pp = pp->p_next) {
1866 np = pp;
1867 /*
1868 * Find if this job is in the foreground. It could be that
1869 * the process leader has exited and the foreground flag
1870 * is cleared for it.
1871 */
1872 do
1873 /*
1874 * If a process is in the foreground we try to kill
1875 * it's process group. If we succeed, then the
1876 * whole job is gone. Otherwise we keep going...
1877 * But avoid sending HUP to the shell again.
1878 */
1879 if (((np->p_flags & PFOREGND) != 0) && np->p_jobid != shpgrp) {
1880 np->p_flags &= ~PHUP;
1881 if (killpg(np->p_jobid, SIGHUP) != -1) {
1882 /* In case the job was suspended... */
1883 #ifdef SIGCONT
1884 (void) killpg(np->p_jobid, SIGCONT);
1885 #endif
1886 break;
1887 }
1888 }
1889 while ((np = np->p_friends) != pp);
1890 }
1891 }
1892 #endif /* POSIXJOBS */
1893
1894 xexit(SIGHUP);
1895 }
1896
1897 static Char *jobargv[2] = {STRjobs, 0};
1898
1899 /*
1900 * Catch an interrupt, e.g. during lexical input.
1901 * If we are an interactive shell, we reset the interrupt catch
1902 * immediately. In any case we drain the shell output,
1903 * and finally go through the normal error mechanism, which
1904 * gets a chance to make the shell go away.
1905 */
1906 int just_signaled; /* bugfix by Michael Bloom (mg@ttidca.TTI.COM) */
1907
1908 void
pintr(void)1909 pintr(void)
1910 {
1911 just_signaled = 1;
1912 pintr1(1);
1913 }
1914
1915 void
pintr1(int wantnl)1916 pintr1(int wantnl)
1917 {
1918 if (setintr) {
1919 if (pjobs) {
1920 pjobs = 0;
1921 xputchar('\n');
1922 dojobs(jobargv, NULL);
1923 stderror(ERR_NAME | ERR_INTR);
1924 }
1925 }
1926 /* MH - handle interrupted completions specially */
1927 {
1928 if (InsideCompletion)
1929 stderror(ERR_SILENT);
1930 }
1931 /* JV - Make sure we shut off inputl */
1932 {
1933 (void) Cookedmode();
1934 GettingInput = 0;
1935 if (evalvec)
1936 doneinp = 1;
1937 }
1938 drainoline();
1939 #ifdef HAVE_GETPWENT
1940 (void) endpwent();
1941 #endif
1942
1943 /*
1944 * If we have an active "onintr" then we search for the label. Note that if
1945 * one does "onintr -" then we shan't be interruptible so we needn't worry
1946 * about that here.
1947 */
1948 if (gointr) {
1949 gotolab(gointr);
1950 reset();
1951 }
1952 else if (intty && wantnl) {
1953 if (editing) {
1954 /*
1955 * If we are editing a multi-line input command, and move to
1956 * the beginning of the line, we don't want to trash it when
1957 * we hit ^C
1958 */
1959 PastBottom();
1960 ClearLines();
1961 ClearDisp();
1962 }
1963 else {
1964 /* xputchar('\n'); *//* Some like this, others don't */
1965 (void) putraw('\r');
1966 (void) putraw('\n');
1967 }
1968 }
1969 stderror(ERR_SILENT);
1970 }
1971
1972 /*
1973 * Process is the main driving routine for the shell.
1974 * It runs all command processing, except for those within { ... }
1975 * in expressions (which is run by a routine evalav in sh.exp.c which
1976 * is a stripped down process), and `...` evaluation which is run
1977 * also by a subset of this code in sh.glob.c in the routine backeval.
1978 *
1979 * The code here is a little strange because part of it is interruptible
1980 * and hence freeing of structures appears to occur when none is necessary
1981 * if this is ignored.
1982 *
1983 * Note that if catch is not set then we will unwind on any error.
1984 * If an end-of-file occurs, we return.
1985 */
1986 void
process(int catch)1987 process(int catch)
1988 {
1989 jmp_buf_t osetexit;
1990 /* PWP: This might get nuked by longjmp so don't make it a register var */
1991 size_t omark;
1992 volatile int didexitset = 0;
1993
1994 getexit(osetexit);
1995 omark = cleanup_push_mark();
1996 for (;;) {
1997 struct command *t;
1998 int hadhist, old_pintr_disabled;
1999
2000 (void)setexit();
2001 if (didexitset == 0) {
2002 exitset++;
2003 didexitset++;
2004 }
2005 pendjob();
2006
2007 justpr = enterhist; /* execute if not entering history */
2008
2009 if (haderr) {
2010 if (!catch) {
2011 /* unwind */
2012 doneinp = 0;
2013 cleanup_pop_mark(omark);
2014 resexit(osetexit);
2015 reset();
2016 }
2017 haderr = 0;
2018 /*
2019 * Every error is eventually caught here or the shell dies. It is
2020 * at this point that we clean up any left-over open files, by
2021 * closing all but a fixed number of pre-defined files. Thus
2022 * routines don't have to worry about leaving files open due to
2023 * deeper errors... they will get closed here.
2024 */
2025 closem();
2026 continue;
2027 }
2028 if (doneinp) {
2029 doneinp = 0;
2030 break;
2031 }
2032 if (chkstop)
2033 chkstop--;
2034 if (neednote)
2035 pnote();
2036 if (intty && prompt && evalvec == 0) {
2037 just_signaled = 0;
2038 mailchk();
2039 /*
2040 * Watch for logins/logouts. Next is scheduled commands stored
2041 * previously using "sched." Then execute periodic commands.
2042 * Following that, the prompt precmd is run.
2043 */
2044 #ifndef HAVENOUTMP
2045 watch_login(0);
2046 #endif /* !HAVENOUTMP */
2047 sched_run();
2048 period_cmd();
2049 precmd();
2050 /*
2051 * If we are at the end of the input buffer then we are going to
2052 * read fresh stuff. Otherwise, we are rereading input and don't
2053 * need or want to prompt.
2054 */
2055 if (fseekp == feobp && aret == TCSH_F_SEEK)
2056 printprompt(0, NULL);
2057 flush();
2058 setalarm(1);
2059 }
2060 if (seterr) {
2061 xfree(seterr);
2062 seterr = NULL;
2063 }
2064
2065 /*
2066 * Interruptible during interactive reads
2067 */
2068 if (setintr)
2069 pintr_push_enable(&old_pintr_disabled);
2070 freelex(¶ml);
2071 hadhist = lex(¶ml);
2072 if (setintr)
2073 cleanup_until(&old_pintr_disabled);
2074 cleanup_push(¶ml, lex_cleanup);
2075
2076 /*
2077 * Echo not only on VERBOSE, but also with history expansion. If there
2078 * is a lexical error then we forego history echo.
2079 * Do not echo if we're only entering history (source -h).
2080 */
2081 if ((hadhist && !seterr && intty && !tellwhat && !Expand && !whyles) ||
2082 (!enterhist && adrof(STRverbose)))
2083 {
2084 int odidfds = didfds;
2085 haderr = 1;
2086 didfds = 0;
2087 prlex(¶ml);
2088 flush();
2089 haderr = 0;
2090 didfds = odidfds;
2091 }
2092 (void) alarm(0); /* Autologout OFF */
2093 alrmcatch_disabled = 1;
2094
2095 /*
2096 * Save input text on the history list if reading in old history, or it
2097 * is from the terminal at the top level and not in a loop.
2098 *
2099 * PWP: entry of items in the history list while in a while loop is done
2100 * elsewhere...
2101 */
2102 if (enterhist || (catch && intty && !whyles && !tellwhat && !arun))
2103 savehist(¶ml, enterhist > 1);
2104
2105 if (Expand && seterr)
2106 Expand = 0;
2107
2108 /*
2109 * Print lexical error messages, except when sourcing history lists.
2110 */
2111 if (!enterhist && seterr)
2112 stderror(ERR_OLD);
2113
2114 /*
2115 * If had a history command :p modifier then this is as far as we
2116 * should go
2117 */
2118 if (justpr)
2119 goto cmd_done;
2120
2121 /*
2122 * If had a tellwhat from twenex() then do
2123 */
2124 if (tellwhat) {
2125 (void) tellmewhat(¶ml, NULL);
2126 goto cmd_done;
2127 }
2128
2129 alias(¶ml);
2130
2131 #ifdef BSDJOBS
2132 /*
2133 * If we are interactive, try to continue jobs that we have stopped
2134 */
2135 if (prompt)
2136 continue_jobs(¶ml);
2137 #endif /* BSDJOBS */
2138
2139 /*
2140 * Check to see if the user typed "rm * .o" or something
2141 */
2142 if (prompt)
2143 rmstar(¶ml);
2144 /*
2145 * Parse the words of the input into a parse tree.
2146 */
2147 t = syntax(paraml.next, ¶ml, 0);
2148 /*
2149 * We cannot cleanup push here, because cd /blah; echo foo
2150 * would rewind t on the chdir error, and free the rest of the command
2151 */
2152 if (seterr) {
2153 freesyn(t);
2154 stderror(ERR_OLD);
2155 }
2156
2157 postcmd();
2158 /*
2159 * Execute the parse tree From: Michael Schroeder
2160 * <mlschroe@immd4.informatik.uni-erlangen.de> was execute(t, tpgrp);
2161 */
2162 execute(t, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
2163 freesyn(t);
2164
2165 /*
2166 * Made it!
2167 */
2168 #ifdef SIG_WINDOW
2169 if (windowchg || (catch && intty && !whyles && !tellwhat)) {
2170 (void) check_window_size(0); /* for window systems */
2171 }
2172 #endif /* SIG_WINDOW */
2173 setcopy(STR_, InputBuf, VAR_READWRITE | VAR_NOGLOB);
2174 cmd_done:
2175 if (cleanup_reset())
2176 cleanup_until(¶ml);
2177 else
2178 haderr = 1;
2179 }
2180 cleanup_pop_mark(omark);
2181 resexit(osetexit);
2182 exitset--;
2183 handle_pending_signals();
2184 }
2185
2186 /*ARGSUSED*/
2187 void
dosource(Char ** t,struct command * c)2188 dosource(Char **t, struct command *c)
2189 {
2190 Char *f;
2191 int hflg = 0;
2192 char *file;
2193
2194 USE(c);
2195 t++;
2196 if (*t && eq(*t, STRmh)) {
2197 if (*++t == NULL)
2198 stderror(ERR_NAME | ERR_HFLAG);
2199 hflg++;
2200 }
2201 else if (*t && eq(*t, STRmm)) {
2202 if (*++t == NULL)
2203 stderror(ERR_NAME | ERR_MFLAG);
2204 hflg = 2;
2205 }
2206
2207 f = globone(*t++, G_ERROR);
2208 file = strsave(short2str(f));
2209 cleanup_push(file, xfree);
2210 xfree(f);
2211 t = glob_all_or_error(t);
2212 cleanup_push(t, blk_cleanup);
2213 if ((!srcfile(file, 0, hflg, t)) && (!hflg) && (!bequiet))
2214 stderror(ERR_SYSTEM, file, strerror(errno));
2215 cleanup_until(file);
2216 }
2217
2218 /*
2219 * Check for mail.
2220 * If we are a login shell, then we don't want to tell
2221 * about any mail file unless its been modified
2222 * after the time we started.
2223 * This prevents us from telling the user things he already
2224 * knows, since the login program insists on saying
2225 * "You have mail."
2226 */
2227
2228 /*
2229 * The AMS version.
2230 * This version checks if the file is a directory, and if so,
2231 * tells you the number of files in it, otherwise do the old thang.
2232 * The magic "+1" in the time calculation is to compensate for
2233 * an AFS bug where directory mtimes are set to 1 second in
2234 * the future.
2235 */
2236
2237 static void
mailchk(void)2238 mailchk(void)
2239 {
2240 struct varent *v;
2241 Char **vp;
2242 time_t t;
2243 int intvl, cnt;
2244 struct stat stb;
2245 int new;
2246
2247 v = adrof(STRmail);
2248 if (v == NULL || v->vec == NULL)
2249 return;
2250 (void) time(&t);
2251 vp = v->vec;
2252 cnt = blklen(vp);
2253 intvl = (cnt && number(*vp)) ? (--cnt, getn(*vp++)) : MAILINTVL;
2254 if (intvl < 1)
2255 intvl = 1;
2256 if (chktim + intvl > t)
2257 return;
2258 for (; *vp; vp++) {
2259 char *filename = short2str(*vp);
2260 char *mboxdir = filename;
2261
2262 if (stat(filename, &stb) < 0)
2263 continue;
2264 #if defined(BSDTIMES) || defined(_SEQUENT_)
2265 new = stb.st_mtime > time0.tv_sec;
2266 #else
2267 new = stb.st_mtime > seconds0;
2268 #endif
2269 if (S_ISDIR(stb.st_mode)) {
2270 DIR *mailbox;
2271 int mailcount = 0;
2272 char *tempfilename;
2273 struct stat stc;
2274
2275 tempfilename = xasprintf("%s/new", filename);
2276
2277 if (stat(tempfilename, &stc) != -1 && S_ISDIR(stc.st_mode)) {
2278 /*
2279 * "filename/new" exists and is a directory; you are
2280 * using Qmail.
2281 */
2282 stb = stc;
2283 #if defined(BSDTIMES) || defined(_SEQUENT_)
2284 new = stb.st_mtime > time0.tv_sec;
2285 #else
2286 new = stb.st_mtime > seconds0;
2287 #endif
2288 mboxdir = tempfilename;
2289 }
2290
2291 if (stb.st_mtime <= chktim + 1 || (loginsh && !new)) {
2292 xfree(tempfilename);
2293 continue;
2294 }
2295
2296 mailbox = opendir(mboxdir);
2297 xfree(tempfilename);
2298 if (mailbox == NULL)
2299 continue;
2300
2301 /* skip . and .. */
2302 if (!readdir(mailbox) || !readdir(mailbox)) {
2303 (void)closedir(mailbox);
2304 continue;
2305 }
2306
2307 while (readdir(mailbox))
2308 mailcount++;
2309
2310 (void)closedir(mailbox);
2311 if (mailcount == 0)
2312 continue;
2313
2314 if (cnt == 1)
2315 xprintf(CGETS(11, 3, "You have %d mail messages.\n"),
2316 mailcount);
2317 else
2318 xprintf(CGETS(11, 4, "You have %d mail messages in %s.\n"),
2319 mailcount, filename);
2320 }
2321 else {
2322 char *type;
2323
2324 if (stb.st_size == 0 || stb.st_atime >= stb.st_mtime ||
2325 (stb.st_atime <= chktim && stb.st_mtime <= chktim) ||
2326 (loginsh && !new))
2327 continue;
2328 type = strsave(new ? CGETS(11, 6, "new ") : "");
2329 cleanup_push(type, xfree);
2330 if (cnt == 1)
2331 xprintf(CGETS(11, 5, "You have %smail.\n"), type);
2332 else
2333 xprintf(CGETS(11, 7, "You have %smail in %s.\n"), type, filename);
2334 cleanup_until(type);
2335 }
2336 }
2337 chktim = t;
2338 }
2339
2340 /*
2341 * Extract a home directory from the password file
2342 * The argument points to a buffer where the name of the
2343 * user whose home directory is sought is currently.
2344 * We return home directory of the user, or NULL.
2345 */
2346 Char *
gethdir(const Char * home)2347 gethdir(const Char *home)
2348 {
2349 Char *h;
2350
2351 /*
2352 * Is it us?
2353 */
2354 if (*home == '\0') {
2355 if ((h = varval(STRhome)) != STRNULL)
2356 return Strsave(h);
2357 else
2358 return NULL;
2359 }
2360
2361 /*
2362 * Look in the cache
2363 */
2364 if ((h = gettilde(home)) == NULL)
2365 return NULL;
2366 else
2367 return Strsave(h);
2368 }
2369
2370 /*
2371 * Move the initial descriptors to their eventual
2372 * resting places, closing all other units.
2373 */
2374 void
initdesc(void)2375 initdesc(void)
2376 {
2377 #ifdef NLS_BUGS
2378 #ifdef NLS_CATALOGS
2379 nlsclose();
2380 #endif /* NLS_CATALOGS */
2381 #endif /* NLS_BUGS */
2382
2383
2384 didfds = 0; /* 0, 1, 2 aren't set up */
2385 (void) close_on_exec(SHIN = dcopy(0, FSHIN), 1);
2386 (void) close_on_exec(SHOUT = dcopy(1, FSHOUT), 1);
2387 (void) close_on_exec(SHDIAG = dcopy(2, FSHDIAG), 1);
2388 (void) close_on_exec(OLDSTD = dcopy(SHIN, FOLDSTD), 1);
2389 #ifndef CLOSE_ON_EXEC
2390 didcch = 0; /* Havent closed for child */
2391 #endif /* CLOSE_ON_EXEC */
2392 if (SHDIAG >= 0)
2393 isdiagatty = isatty(SHDIAG);
2394 else
2395 isdiagatty = 0;
2396 if (SHDIAG >= 0)
2397 isoutatty = isatty(SHOUT);
2398 else
2399 isoutatty = 0;
2400 #ifdef NLS_BUGS
2401 #ifdef NLS_CATALOGS
2402 nlsinit();
2403 #endif /* NLS_CATALOGS */
2404 #endif /* NLS_BUGS */
2405 }
2406
2407
2408 void
2409 #ifdef PROF
done(int i)2410 done(int i)
2411 #else
2412 xexit(int i)
2413 #endif
2414 {
2415 #ifdef TESLA
2416 if (loginsh && do_logout) {
2417 /* this is to send hangup signal to the develcon */
2418 /* we toggle DTR. clear dtr - sleep 1 - set dtr */
2419 /* ioctl will return ENOTTY for pty's but we ignore it */
2420 /* exitstat will run after disconnect */
2421 /* we sleep for 2 seconds to let things happen in */
2422 /* .logout and rechist() */
2423 #ifdef TIOCCDTR
2424 (void) sleep(2);
2425 (void) ioctl(FSHTTY, TIOCCDTR, NULL);
2426 (void) sleep(1);
2427 (void) ioctl(FSHTTY, TIOCSDTR, NULL);
2428 #endif /* TIOCCDTR */
2429 }
2430 #endif /* TESLA */
2431
2432 {
2433 struct process *pp, *np;
2434 pid_t mypid = getpid();
2435 /* Kill all processes marked for hup'ing */
2436 for (pp = proclist.p_next; pp; pp = pp->p_next) {
2437 np = pp;
2438 do
2439 if ((np->p_flags & PHUP) && np->p_jobid != shpgrp &&
2440 np->p_parentid == mypid) {
2441 if (killpg(np->p_jobid, SIGHUP) != -1) {
2442 /* In case the job was suspended... */
2443 #ifdef SIGCONT
2444 (void) killpg(np->p_jobid, SIGCONT);
2445 #endif
2446 break;
2447 }
2448 }
2449 while ((np = np->p_friends) != pp);
2450 }
2451 }
2452 untty();
2453 #ifdef NLS_CATALOGS
2454 /*
2455 * We need to call catclose, because SVR4 leaves symlinks behind otherwise
2456 * in the catalog directories. We cannot close on a vforked() child,
2457 * because messages will stop working on the parent too.
2458 */
2459 if (child == 0)
2460 nlsclose();
2461 #endif /* NLS_CATALOGS */
2462 #ifdef WINNT_NATIVE
2463 nt_cleanup();
2464 #endif /* WINNT_NATIVE */
2465 _exit(i);
2466 }
2467
2468 #ifndef _PATH_DEFPATH
2469 static Char **
defaultpath(void)2470 defaultpath(void)
2471 {
2472 char *ptr;
2473 Char **blk, **blkp;
2474 struct stat stb;
2475
2476 blkp = blk = xmalloc(sizeof(Char *) * 10);
2477
2478 #ifndef NODOT
2479 # ifndef DOTLAST
2480 *blkp++ = Strsave(STRdot);
2481 # endif
2482 #endif
2483
2484 #define DIRAPPEND(a) \
2485 if (stat(ptr = a, &stb) == 0 && S_ISDIR(stb.st_mode)) \
2486 *blkp++ = SAVE(ptr)
2487
2488 #ifdef _PATH_LOCAL
2489 DIRAPPEND(_PATH_LOCAL);
2490 #endif
2491
2492 #ifdef _PATH_USRUCB
2493 DIRAPPEND(_PATH_USRUCB);
2494 #endif
2495
2496 #ifdef _PATH_USRBSD
2497 DIRAPPEND(_PATH_USRBSD);
2498 #endif
2499
2500 #ifdef _PATH_BIN
2501 DIRAPPEND(_PATH_BIN);
2502 #endif
2503
2504 #ifdef _PATH_USRBIN
2505 DIRAPPEND(_PATH_USRBIN);
2506 #endif
2507
2508 #undef DIRAPPEND
2509
2510 #ifndef NODOT
2511 # ifdef DOTLAST
2512 *blkp++ = Strsave(STRdot);
2513 # endif
2514 #endif
2515 *blkp = NULL;
2516 return (blk);
2517 }
2518 #endif
2519
2520 static void
record(void)2521 record(void)
2522 {
2523 static int again = 0;
2524 int ophup_disabled;
2525
2526 if (again++)
2527 return;
2528
2529 ophup_disabled = phup_disabled;
2530 phup_disabled = 1;
2531 if (!fast) {
2532 recdirs(NULL, adrof(STRsavedirs) != NULL);
2533 rechist(NULL, adrof(STRsavehist) != NULL);
2534 }
2535 displayHistStats("Exiting"); /* no-op unless DEBUG_HIST */
2536 phup_disabled = ophup_disabled;
2537 }
2538
2539 /*
2540 * Grab the tty repeatedly, and give up if we are not in the correct
2541 * tty process group.
2542 */
2543 int
grabpgrp(int fd,pid_t desired)2544 grabpgrp(int fd, pid_t desired)
2545 {
2546 struct sigaction old;
2547 pid_t pgrp;
2548 size_t i;
2549
2550 for (i = 0; i < 100; i++) {
2551 if ((pgrp = tcgetpgrp(fd)) == -1)
2552 return -1;
2553 if (pgrp == desired)
2554 return 0;
2555 (void)sigaction(SIGTTIN, NULL, &old);
2556 (void)signal(SIGTTIN, SIG_DFL);
2557 (void)kill(0, SIGTTIN);
2558 (void)sigaction(SIGTTIN, &old, NULL);
2559 }
2560 errno = EPERM;
2561 return -1;
2562 }
2563