Import tcsh-6.17.00
[dragonfly.git] / contrib / tcsh-6 / tc.func.c
CommitLineData
57e3f2b5 1/* $Header: /p/tcsh/cvsroot/tcsh/tc.func.c,v 3.139 2009/06/25 21:15:38 christos Exp $ */
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2/*
3 * tc.func.c: New tcsh builtins.
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#include "sh.h"
34
57e3f2b5 35RCSID("$tcsh: tc.func.c,v 3.139 2009/06/25 21:15:38 christos Exp $")
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36
37#include "ed.h"
38#include "ed.defns.h" /* for the function names */
39#include "tw.h"
40#include "tc.h"
41#ifdef WINNT_NATIVE
42#include "nt.const.h"
43#else /* WINNT_NATIVE */
44#include <sys/wait.h>
45#endif /* WINNT_NATIVE */
46
47#ifdef AFS
48#include <afs/stds.h>
49#include <afs/kautils.h>
50long ka_UserAuthenticateGeneral();
51#endif /* AFS */
52
53#ifdef TESLA
54extern int do_logout;
55#endif /* TESLA */
56extern time_t t_period;
57extern int just_signaled;
58static int precmd_active = 0;
59static int jobcmd_active = 0; /* GrP */
60static int postcmd_active = 0;
61static int periodic_active = 0;
62static int cwdcmd_active = 0; /* PWP: for cwd_cmd */
63static int beepcmd_active = 0;
64static void (*alm_fun)(void) = NULL;
65
66static void auto_logout (void);
67static char *xgetpass (const char *);
68static void auto_lock (void);
69#ifdef BSDJOBS
70static void insert (struct wordent *, int);
71static void insert_we (struct wordent *, struct wordent *);
72static int inlist (Char *, Char *);
73#endif /* BSDJOBS */
74static int tildecompare (const void *, const void *);
75static Char *gethomedir (const Char *);
76#ifdef REMOTEHOST
77static void palarm (int);
78static void getremotehost (int);
79#endif /* REMOTEHOST */
80
81/*
82 * Tops-C shell
83 */
84
85/*
86 * expand_lex: Take the given lex and return an expanded version of it.
87 * First guy in lex list is ignored; last guy is ^J which we ignore.
88 * Only take lex'es from position 'from' to position 'to' inclusive
89 *
90 * Note: csh sometimes sets bit 8 in characters which causes all kinds
91 * of problems if we don't mask it here. Note: excl's in lexes have been
92 * un-back-slashed and must be re-back-slashed
93 *
94 */
95/* PWP: this is a combination of the old sprlex() and the expand_lex from
96 the magic-space stuff */
97
98Char *
99expand_lex(const struct wordent *sp0, int from, int to)
100{
101 struct Strbuf buf = Strbuf_INIT;
102 const struct wordent *sp;
103 Char *s;
104 Char prev_c;
105 int i;
106
107 prev_c = '\0';
108
109 if (!sp0 || (sp = sp0->next) == sp0 || sp == (sp0 = sp0->prev))
110 return Strbuf_finish(&buf); /* null lex */
111
112 for (i = 0; ; i++) {
113 if ((i >= from) && (i <= to)) { /* if in range */
114 for (s = sp->word; *s; s++) {
115 /*
116 * bugfix by Michael Bloom: anything but the current history
117 * character {(PWP) and backslash} seem to be dealt with
118 * elsewhere.
119 */
120 if ((*s & QUOTE)
121 && (((*s & TRIM) == HIST) ||
122 (((*s & TRIM) == '\'') && (prev_c != '\\')) ||
123 (((*s & TRIM) == '\"') && (prev_c != '\\')) ||
124 (((*s & TRIM) == '\\') && (prev_c != '\\')))) {
125 Strbuf_append1(&buf, '\\');
126 }
127 Strbuf_append1(&buf, *s & TRIM);
128 prev_c = *s;
129 }
130 Strbuf_append1(&buf, ' ');
131 }
132 sp = sp->next;
133 if (sp == sp0)
134 break;
135 }
136 if (buf.len != 0)
137 buf.len--; /* get rid of trailing space */
138
139 return Strbuf_finish(&buf);
140}
141
142Char *
143sprlex(const struct wordent *sp0)
144{
145 return expand_lex(sp0, 0, INT_MAX);
146}
147
148
149Char *
150Itoa(int n, size_t min_digits, Char attributes)
151{
152 /*
153 * The array size here is derived from
154 * log8(UINT_MAX)
155 * which is guaranteed to be enough for a decimal
156 * representation. We add 1 because integer divide
157 * rounds down.
158 */
159#ifndef CHAR_BIT
160# define CHAR_BIT 8
161#endif
162 Char buf[CHAR_BIT * sizeof(int) / 3 + 1], *res, *p, *s;
163 unsigned int un; /* handle most negative # too */
164 int pad = (min_digits != 0);
165
166 if (sizeof(buf) - 1 < min_digits)
167 min_digits = sizeof(buf) - 1;
168
169 un = n;
170 if (n < 0)
171 un = -n;
172
173 p = buf;
174 do {
175 *p++ = un % 10 + '0';
176 un /= 10;
177 } while ((pad && --min_digits > 0) || un != 0);
178
179 res = xmalloc((p - buf + 2) * sizeof(*res));
180 s = res;
181 if (n < 0)
182 *s++ = '-';
183 while (p > buf)
184 *s++ = *--p | attributes;
185
186 *s = '\0';
187 return res;
188}
189
190
191/*ARGSUSED*/
192void
193dolist(Char **v, struct command *c)
194{
195 Char **globbed;
196 int i, k;
197 struct stat st;
198
199 USE(c);
200 if (*++v == NULL) {
201 struct Strbuf word = Strbuf_INIT;
202
203 Strbuf_terminate(&word);
204 cleanup_push(&word, Strbuf_cleanup);
205 (void) t_search(&word, LIST, TW_ZERO, 0, STRNULL, 0);
206 cleanup_until(&word);
207 return;
208 }
209 v = glob_all_or_error(v);
210 globbed = v;
211 cleanup_push(globbed, blk_cleanup);
212 for (k = 0; v[k] != NULL && v[k][0] != '-'; k++)
213 continue;
214 if (v[k]) {
215 /*
216 * We cannot process a flag therefore we let ls do it right.
217 */
218 Char *lspath;
219 struct command *t;
220 struct wordent cmd, *nextword, *lastword;
221 Char *cp;
222 struct varent *vp;
223
224 if (setintr) {
225 pintr_disabled++;
226 cleanup_push(&pintr_disabled, disabled_cleanup);
227 }
228 if (seterr) {
229 xfree(seterr);
230 seterr = NULL;
231 }
232
233 lspath = STRls;
234 STRmCF[1] = 'C';
235 STRmCF[3] = '\0';
236 /* Look at listflags, to add -A to the flags, to get a path
237 of ls if necessary */
238 if ((vp = adrof(STRlistflags)) != NULL && vp->vec != NULL &&
239 vp->vec[0] != STRNULL) {
240 if (vp->vec[1] != NULL && vp->vec[1][0] != '\0')
241 lspath = vp->vec[1];
242 for (cp = vp->vec[0]; *cp; cp++)
243 switch (*cp) {
244 case 'x':
245 STRmCF[1] = 'x';
246 break;
247 case 'a':
248 STRmCF[3] = 'a';
249 break;
250 case 'A':
251 STRmCF[3] = 'A';
252 break;
253 default:
254 break;
255 }
256 }
257
258 cmd.word = STRNULL;
259 lastword = &cmd;
260 nextword = xcalloc(1, sizeof cmd);
261 nextword->word = Strsave(lspath);
262 lastword->next = nextword;
263 nextword->prev = lastword;
264 lastword = nextword;
265 nextword = xcalloc(1, sizeof cmd);
266 nextword->word = Strsave(STRmCF);
267 lastword->next = nextword;
268 nextword->prev = lastword;
269#if defined(KANJI) && defined(SHORT_STRINGS) && defined(DSPMBYTE)
270 if (dspmbyte_ls) {
271 lastword = nextword;
272 nextword = xcalloc(1, sizeof cmd);
273 nextword->word = Strsave(STRmmliteral);
274 lastword->next = nextword;
275 nextword->prev = lastword;
276 }
277#endif
278#ifdef COLOR_LS_F
279 if (color_context_ls) {
280 lastword = nextword;
281 nextword = xcalloc(1, sizeof cmd);
282 nextword->word = Strsave(STRmmcolormauto);
283 lastword->next = nextword;
284 nextword->prev = lastword;
285 }
286#endif /* COLOR_LS_F */
287 lastword = nextword;
288 for (cp = *v; cp; cp = *++v) {
289 nextword = xcalloc(1, sizeof cmd);
290 nextword->word = quote(Strsave(cp));
291 lastword->next = nextword;
292 nextword->prev = lastword;
293 lastword = nextword;
294 }
295 lastword->next = &cmd;
296 cmd.prev = lastword;
297 cleanup_push(&cmd, lex_cleanup);
298
299 /* build a syntax tree for the command. */
300 t = syntax(cmd.next, &cmd, 0);
301 cleanup_push(t, syntax_cleanup);
302 if (seterr)
303 stderror(ERR_OLD);
304 /* expand aliases like process() does */
305 /* alias(&cmd); */
306 /* execute the parse tree. */
307 execute(t, tpgrp > 0 ? tpgrp : -1, NULL, NULL, FALSE);
308 /* done. free the lex list and parse tree. */
309 cleanup_until(&cmd);
310 if (setintr)
311 cleanup_until(&pintr_disabled);
312 }
313 else {
314 Char *dp, *tmp;
315 struct Strbuf buf = Strbuf_INIT;
316
317 cleanup_push(&buf, Strbuf_cleanup);
318 for (k = 0, i = 0; v[k] != NULL; k++) {
319 tmp = dnormalize(v[k], symlinks == SYM_IGNORE);
320 cleanup_push(tmp, xfree);
321 dp = Strend(tmp) - 1;
322 if (*dp == '/' && dp != tmp)
323#ifdef apollo
324 if (dp != &tmp[1])
325#endif /* apollo */
326 *dp = '\0';
327 if (stat(short2str(tmp), &st) == -1) {
328 int err;
329
330 err = errno;
331 if (k != i) {
332 if (i != 0)
333 xputchar('\n');
334 print_by_column(STRNULL, &v[i], k - i, FALSE);
335 }
336 xprintf("%S: %s.\n", tmp, strerror(err));
337 i = k + 1;
338 }
339 else if (S_ISDIR(st.st_mode)) {
340 Char *cp;
341
342 if (k != i) {
343 if (i != 0)
344 xputchar('\n');
345 print_by_column(STRNULL, &v[i], k - i, FALSE);
346 }
347 if (k != 0 && v[1] != NULL)
348 xputchar('\n');
349 xprintf("%S:\n", tmp);
350 buf.len = 0;
351 for (cp = tmp; *cp; cp++)
352 Strbuf_append1(&buf, (*cp | QUOTE));
353 Strbuf_terminate(&buf);
354 dp = &buf.s[buf.len - 1];
355 if (
356#ifdef WINNT_NATIVE
357 (*dp != (Char) (':' | QUOTE)) &&
358#endif /* WINNT_NATIVE */
359 (*dp != (Char) ('/' | QUOTE))) {
360 Strbuf_append1(&buf, '/');
361 Strbuf_terminate(&buf);
362 } else
363 *dp &= TRIM;
364 (void) t_search(&buf, LIST, TW_ZERO, 0, STRNULL, 0);
365 i = k + 1;
366 }
367 cleanup_until(tmp);
368 }
369 cleanup_until(&buf);
370 if (k != i) {
371 if (i != 0)
372 xputchar('\n');
373 print_by_column(STRNULL, &v[i], k - i, FALSE);
374 }
375 }
376
377 cleanup_until(globbed);
378}
379
380extern int GotTermCaps;
381
382/*ARGSUSED*/
383void
384dotelltc(Char **v, struct command *c)
385{
386 USE(v);
387 USE(c);
388 if (!GotTermCaps)
389 GetTermCaps();
390 TellTC();
391}
392
393/*ARGSUSED*/
394void
395doechotc(Char **v, struct command *c)
396{
397 USE(c);
398 if (!GotTermCaps)
399 GetTermCaps();
400 EchoTC(++v);
401}
402
403/*ARGSUSED*/
404void
405dosettc(Char **v, struct command *c)
406{
407 char *tv[2];
408
409 USE(c);
410 if (!GotTermCaps)
411 GetTermCaps();
412
413 tv[0] = strsave(short2str(v[1]));
414 cleanup_push(tv[0], xfree);
415 tv[1] = strsave(short2str(v[2]));
416 cleanup_push(tv[1], xfree);
417 SetTC(tv[0], tv[1]);
418 cleanup_until(tv[0]);
419}
420
421/* The dowhich() is by:
422 * Andreas Luik <luik@isaak.isa.de>
423 * I S A GmbH - Informationssysteme fuer computerintegrierte Automatisierung
424 * Azenberstr. 35
425 * D-7000 Stuttgart 1
426 * West-Germany
427 * Thanks!!
428 */
429int
430cmd_expand(Char *cmd, Char **str)
431{
432 struct wordent lexp[3];
433 struct varent *vp;
434 int rv = TRUE;
435
436 lexp[0].next = &lexp[1];
437 lexp[1].next = &lexp[2];
438 lexp[2].next = &lexp[0];
439
440 lexp[0].prev = &lexp[2];
441 lexp[1].prev = &lexp[0];
442 lexp[2].prev = &lexp[1];
443
444 lexp[0].word = STRNULL;
445 lexp[2].word = STRret;
446
447 if ((vp = adrof1(cmd, &aliases)) != NULL && vp->vec != NULL) {
448 if (str == NULL) {
449 xprintf(CGETS(22, 1, "%S: \t aliased to "), cmd);
450 blkpr(vp->vec);
451 xputchar('\n');
452 }
453 else
454 *str = blkexpand(vp->vec);
455 }
456 else {
457 lexp[1].word = cmd;
458 rv = tellmewhat(lexp, str);
459 }
460 return rv;
461}
462
463
464/*ARGSUSED*/
465void
466dowhich(Char **v, struct command *c)
467{
468 int rv = TRUE;
469 USE(c);
470
471 /*
472 * We don't want to glob dowhich args because we lose quoteing
473 * E.g. which \ls if ls is aliased will not work correctly if
474 * we glob here.
475 */
476
477 while (*++v)
478 rv &= cmd_expand(*v, NULL);
479
480 if (!rv)
481 setcopy(STRstatus, STR1, VAR_READWRITE);
482}
483
484/* PWP: a hack to start up your stopped editor on a single keystroke */
485/* jbs - fixed hack so it worked :-) 3/28/89 */
486
487struct process *
488find_stop_ed(void)
489{
490 struct process *pp, *retp;
491 const char *ep, *vp;
492 char *cp, *p;
493 size_t epl, vpl;
494 int pstatus;
495
496 if ((ep = getenv("EDITOR")) != NULL) { /* if we have a value */
497 if ((p = strrchr(ep, '/')) != NULL) /* if it has a path */
498 ep = p + 1; /* then we want only the last part */
499 }
500 else
501 ep = "ed";
502
503 if ((vp = getenv("VISUAL")) != NULL) { /* if we have a value */
504 if ((p = strrchr(vp, '/')) != NULL) /* and it has a path */
505 vp = p + 1; /* then we want only the last part */
506 }
507 else
508 vp = "vi";
509
510 for (vpl = 0; vp[vpl] && !isspace((unsigned char)vp[vpl]); vpl++)
511 continue;
512 for (epl = 0; ep[epl] && !isspace((unsigned char)ep[epl]); epl++)
513 continue;
514
515 if (pcurrent == NULL) /* see if we have any jobs */
516 return NULL; /* nope */
517
518 retp = NULL;
519 for (pp = proclist.p_next; pp; pp = pp->p_next)
520 if (pp->p_procid == pp->p_jobid) {
521
522 /*
523 * Only foreground an edit session if it is suspended. Some GUI
524 * editors have may be happily running in a separate window, no
525 * point in foregrounding these if they're already running - webb
526 */
527 pstatus = (int) (pp->p_flags & PALLSTATES);
528 if (pstatus != PINTERRUPTED && pstatus != PSTOPPED &&
529 pstatus != PSIGNALED)
530 continue;
531
532 p = short2str(pp->p_command);
533 /* get the first word */
534 for (cp = p; *cp && !isspace((unsigned char) *cp); cp++)
535 continue;
536 *cp = '\0';
537
538 if ((cp = strrchr(p, '/')) != NULL) /* and it has a path */
539 cp = cp + 1; /* then we want only the last part */
540 else
541 cp = p; /* else we get all of it */
542
543 /* if we find either in the current name, fg it */
544 if (strncmp(ep, cp, epl) == 0 ||
545 strncmp(vp, cp, vpl) == 0) {
546
547 /*
548 * If there is a choice, then choose the current process if
549 * available, or the previous process otherwise, or else
550 * anything will do - Robert Webb (robertw@mulga.cs.mu.oz.au).
551 */
552 if (pp == pcurrent)
553 return pp;
554 else if (retp == NULL || pp == pprevious)
555 retp = pp;
556 }
557 }
558
559 return retp; /* Will be NULL if we didn't find a job */
560}
561
562void
563fg_proc_entry(struct process *pp)
564{
565 jmp_buf_t osetexit;
566 int ohaderr;
567 Char oGettingInput;
568 size_t omark;
569
570 getexit(osetexit);
571
572 pintr_disabled++;
573 oGettingInput = GettingInput;
574 GettingInput = 0;
575
576 ohaderr = haderr; /* we need to ignore setting of haderr due to
577 * process getting stopped by a signal */
578 omark = cleanup_push_mark();
579 if (setexit() == 0) { /* come back here after pjwait */
580 pendjob();
581 (void) alarm(0); /* No autologout */
582 alrmcatch_disabled = 1;
583 if (!pstart(pp, 1)) {
584 pp->p_procid = 0;
585 stderror(ERR_BADJOB, pp->p_command, strerror(errno));
586 }
587 pjwait(pp);
588 }
589 setalarm(1); /* Autologout back on */
590 cleanup_pop_mark(omark);
591 resexit(osetexit);
592 haderr = ohaderr;
593 GettingInput = oGettingInput;
594
595 disabled_cleanup(&pintr_disabled);
596}
597
598static char *
599xgetpass(const char *prm)
600{
601 static struct strbuf pass; /* = strbuf_INIT; */
602 int fd;
603 sigset_t oset, set;
604 struct sigaction sa, osa;
605
606 sa.sa_handler = SIG_IGN;
607 sigemptyset(&sa.sa_mask);
608 sa.sa_flags = 0;
609 (void)sigaction(SIGINT, &sa, &osa);
610
611 sigemptyset(&set);
612 sigaddset(&set, SIGINT);
613 (void)sigprocmask(SIG_UNBLOCK, &set, &oset);
614
615 cleanup_push(&osa, sigint_cleanup);
616 cleanup_push(&oset, sigprocmask_cleanup);
617 (void) Rawmode(); /* Make sure, cause we want echo off */
618 fd = xopen("/dev/tty", O_RDWR|O_LARGEFILE);
619 if (fd == -1)
620 fd = SHIN;
621 else
622 cleanup_push(&fd, open_cleanup);
623
624 xprintf("%s", prm); flush();
625 pass.len = 0;
626 for (;;) {
627 char c;
628
629 if (xread(fd, &c, 1) < 1 || c == '\n')
630 break;
631 strbuf_append1(&pass, c);
632 }
633 strbuf_terminate(&pass);
634
57e3f2b5 635 cleanup_until(&osa);
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636
637 return pass.s;
638}
639
640#ifndef NO_CRYPT
641#if !HAVE_DECL_CRYPT
642 extern char *crypt ();
643#endif
644#ifdef HAVE_CRYPT_H
645#include <crypt.h>
646#endif
647#endif
648
649/*
650 * Ask the user for his login password to continue working
651 * On systems that have a shadow password, this will only
652 * work for root, but what can we do?
653 *
654 * If we fail to get the password, then we log the user out
655 * immediately
656 */
657/*ARGSUSED*/
658static void
659auto_lock(void)
660{
661#ifndef NO_CRYPT
662
663 int i;
664 char *srpp = NULL;
665 struct passwd *pw;
666
667#undef XCRYPT
668
669#if defined(HAVE_AUTH_H) && defined(HAVE_GETAUTHUID)
670
671 struct authorization *apw;
672 extern char *crypt16 (const char *, const char *);
673
674# define XCRYPT(a, b) crypt16(a, b)
675
676 if ((pw = xgetpwuid(euid)) != NULL && /* effective user passwd */
677 (apw = getauthuid(euid)) != NULL) /* enhanced ultrix passwd */
678 srpp = apw->a_password;
679
680#elif defined(HAVE_SHADOW_H)
681
682 struct spwd *spw;
683
684# define XCRYPT(a, b) crypt(a, b)
685
686 if ((pw = xgetpwuid(euid)) != NULL) { /* effective user passwd */
687 errno = 0;
688 while ((spw = getspnam(pw->pw_name)) == NULL && errno == EINTR) {
689 handle_pending_signals();
690 errno = 0;
691 }
692 if (spw != NULL) /* shadowed passwd */
693 srpp = spw->sp_pwdp;
694 }
695
696#else
697
698#define XCRYPT(a, b) crypt(a, b)
699
700#if !defined(__MVS__)
701 if ((pw = xgetpwuid(euid)) != NULL) /* effective user passwd */
702 srpp = pw->pw_passwd;
703#endif /* !MVS */
704
705#endif
706
707 if (srpp == NULL) {
708 auto_logout();
709 /*NOTREACHED*/
710 return;
711 }
712
713 setalarm(0); /* Not for locking any more */
714 xputchar('\n');
715 for (i = 0; i < 5; i++) {
716 const char *crpp;
717 char *pp;
718#ifdef AFS
719 char *afsname;
720 Char *safs;
721
722 if ((safs = varval(STRafsuser)) != STRNULL)
723 afsname = short2str(safs);
724 else
725 if ((afsname = getenv("AFSUSER")) == NULL)
726 afsname = pw->pw_name;
727#endif
728 pp = xgetpass("Password:");
729
730 crpp = XCRYPT(pp, srpp);
731 if ((strcmp(crpp, srpp) == 0)
732#ifdef AFS
733 || (ka_UserAuthenticateGeneral(KA_USERAUTH_VERSION,
734 afsname, /* name */
735 NULL, /* instance */
736 NULL, /* realm */
737 pp, /* password */
738 0, /* lifetime */
739 0, 0, /* spare */
740 NULL) /* reason */
741 == 0)
742#endif /* AFS */
743 ) {
744 (void) memset(pp, 0, strlen(pp));
745 if (GettingInput && !just_signaled) {
746 (void) Rawmode();
747 ClearLines();
748 ClearDisp();
749 Refresh();
750 }
751 just_signaled = 0;
752 return;
753 }
754 xprintf(CGETS(22, 2, "\nIncorrect passwd for %s\n"), pw->pw_name);
755 }
756#endif /* NO_CRYPT */
757 auto_logout();
758}
759
760
761static void
762auto_logout(void)
763{
764 xprintf("auto-logout\n");
765 /* Don't leave the tty in raw mode */
766 if (editing)
767 (void) Cookedmode();
768 xclose(SHIN);
769 setcopy(STRlogout, STRautomatic, VAR_READWRITE);
770 child = 1;
771#ifdef TESLA
772 do_logout = 1;
773#endif /* TESLA */
774 GettingInput = FALSE; /* make flush() work to write hist files. Huber*/
775 goodbye(NULL, NULL);
776}
777
778void
779alrmcatch(void)
780{
781 (*alm_fun)();
782 setalarm(1);
783}
784
785/*
786 * Karl Kleinpaste, 21oct1983.
787 * Added precmd(), which checks for the alias
788 * precmd in aliases. If it's there, the alias
789 * is executed as a command. This is done
790 * after mailchk() and just before print-
791 * ing the prompt. Useful for things like printing
792 * one's current directory just before each command.
793 */
794void
795precmd(void)
796{
797 pintr_disabled++;
798 cleanup_push(&pintr_disabled, disabled_cleanup);
799 if (precmd_active) { /* an error must have been caught */
800 aliasrun(2, STRunalias, STRprecmd);
57e3f2b5 801 xprintf("%s", CGETS(22, 3, "Faulty alias 'precmd' removed.\n"));
7d8fb588
MS
802 goto leave;
803 }
804 precmd_active = 1;
805 if (!whyles && adrof1(STRprecmd, &aliases))
806 aliasrun(1, STRprecmd, NULL);
807leave:
808 precmd_active = 0;
809 cleanup_until(&pintr_disabled);
810}
811
812void
813postcmd(void)
814{
815 pintr_disabled++;
816 cleanup_push(&pintr_disabled, disabled_cleanup);
817 if (postcmd_active) { /* an error must have been caught */
818 aliasrun(2, STRunalias, STRpostcmd);
57e3f2b5 819 xprintf("%s", CGETS(22, 3, "Faulty alias 'postcmd' removed.\n"));
7d8fb588
MS
820 goto leave;
821 }
822 postcmd_active = 1;
823 if (!whyles && adrof1(STRpostcmd, &aliases))
824 aliasrun(1, STRpostcmd, NULL);
825leave:
826 postcmd_active = 0;
827 cleanup_until(&pintr_disabled);
828}
829
830/*
831 * Paul Placeway 11/24/87 Added cwd_cmd by hacking precmd() into
832 * submission... Run every time $cwd is set (after it is set). Useful
833 * for putting your machine and cwd (or anything else) in an xterm title
834 * space.
835 */
836void
837cwd_cmd(void)
838{
839 pintr_disabled++;
840 cleanup_push(&pintr_disabled, disabled_cleanup);
841 if (cwdcmd_active) { /* an error must have been caught */
842 aliasrun(2, STRunalias, STRcwdcmd);
57e3f2b5 843 xprintf("%s", CGETS(22, 4, "Faulty alias 'cwdcmd' removed.\n"));
7d8fb588
MS
844 goto leave;
845 }
846 cwdcmd_active = 1;
847 if (!whyles && adrof1(STRcwdcmd, &aliases))
848 aliasrun(1, STRcwdcmd, NULL);
849leave:
850 cwdcmd_active = 0;
851 cleanup_until(&pintr_disabled);
852}
853
854/*
855 * Joachim Hoenig 07/16/91 Added beep_cmd, run every time tcsh wishes
856 * to beep the terminal bell. Useful for playing nice sounds instead.
857 */
858void
859beep_cmd(void)
860{
861 pintr_disabled++;
862 cleanup_push(&pintr_disabled, disabled_cleanup);
863 if (beepcmd_active) { /* an error must have been caught */
864 aliasrun(2, STRunalias, STRbeepcmd);
57e3f2b5 865 xprintf("%s", CGETS(22, 5, "Faulty alias 'beepcmd' removed.\n"));
7d8fb588
MS
866 }
867 else {
868 beepcmd_active = 1;
869 if (!whyles && adrof1(STRbeepcmd, &aliases))
870 aliasrun(1, STRbeepcmd, NULL);
871 }
872 beepcmd_active = 0;
873 cleanup_until(&pintr_disabled);
874}
875
876
877/*
878 * Karl Kleinpaste, 18 Jan 1984.
879 * Added period_cmd(), which executes the alias "periodic" every
880 * $tperiod minutes. Useful for occasional checking of msgs and such.
881 */
882void
883period_cmd(void)
884{
885 Char *vp;
886 time_t t, interval;
887
888 pintr_disabled++;
889 cleanup_push(&pintr_disabled, disabled_cleanup);
890 if (periodic_active) { /* an error must have been caught */
891 aliasrun(2, STRunalias, STRperiodic);
57e3f2b5 892 xprintf("%s", CGETS(22, 6, "Faulty alias 'periodic' removed.\n"));
7d8fb588
MS
893 goto leave;
894 }
895 periodic_active = 1;
896 if (!whyles && adrof1(STRperiodic, &aliases)) {
897 vp = varval(STRtperiod);
898 if (vp == STRNULL) {
899 aliasrun(1, STRperiodic, NULL);
900 goto leave;
901 }
902 interval = getn(vp);
903 (void) time(&t);
904 if (t - t_period >= interval * 60) {
905 t_period = t;
906 aliasrun(1, STRperiodic, NULL);
907 }
908 }
909leave:
910 periodic_active = 0;
911 cleanup_until(&pintr_disabled);
912}
913
914
915/*
916 * GrP Greg Parker May 2001
917 * Added job_cmd(), which is run every time a job is started or
918 * foregrounded. The command is passed a single argument, the string
919 * used to start the job originally. With precmd, useful for setting
920 * xterm titles.
921 * Cloned from cwd_cmd().
922 */
923void
924job_cmd(Char *args)
925{
926 pintr_disabled++;
927 cleanup_push(&pintr_disabled, disabled_cleanup);
928 if (jobcmd_active) { /* an error must have been caught */
929 aliasrun(2, STRunalias, STRjobcmd);
57e3f2b5 930 xprintf("%s", CGETS(22, 14, "Faulty alias 'jobcmd' removed.\n"));
7d8fb588
MS
931 goto leave;
932 }
933 jobcmd_active = 1;
934 if (!whyles && adrof1(STRjobcmd, &aliases)) {
935 struct process *pp = pcurrjob; /* put things back after the hook */
936 aliasrun(2, STRjobcmd, args);
937 pcurrjob = pp;
938 }
939leave:
940 jobcmd_active = 0;
941 cleanup_until(&pintr_disabled);
942}
943
944
945/*
946 * Karl Kleinpaste, 21oct1983.
947 * Set up a one-word alias command, for use for special things.
948 * This code is based on the mainline of process().
949 */
950void
951aliasrun(int cnt, Char *s1, Char *s2)
952{
953 struct wordent w, *new1, *new2; /* for holding alias name */
954 struct command *t = NULL;
955 jmp_buf_t osetexit;
956 int status;
957 size_t omark;
958
959 getexit(osetexit);
960 if (seterr) {
961 xfree(seterr);
962 seterr = NULL; /* don't repeatedly print err msg. */
963 }
964 w.word = STRNULL;
965 new1 = xcalloc(1, sizeof w);
966 new1->word = Strsave(s1);
967 if (cnt == 1) {
968 /* build a lex list with one word. */
969 w.next = w.prev = new1;
970 new1->next = new1->prev = &w;
971 }
972 else {
973 /* build a lex list with two words. */
974 new2 = xcalloc(1, sizeof w);
975 new2->word = Strsave(s2);
976 w.next = new2->prev = new1;
977 new1->next = w.prev = new2;
978 new1->prev = new2->next = &w;
979 }
980 cleanup_push(&w, lex_cleanup);
981
982 /* Save the old status */
983 status = getn(varval(STRstatus));
984
985 /* expand aliases like process() does. */
986 alias(&w);
987 /* build a syntax tree for the command. */
988 t = syntax(w.next, &w, 0);
989 cleanup_push(t, syntax_cleanup);
990 if (seterr)
991 stderror(ERR_OLD);
992
993 psavejob();
994 cleanup_push(&cnt, psavejob_cleanup); /* cnt is used only as a marker */
995
996 /* catch any errors here */
997 omark = cleanup_push_mark();
998 if (setexit() == 0)
999 /* execute the parse tree. */
1000 /*
1001 * From: Michael Schroeder <mlschroe@immd4.informatik.uni-erlangen.de>
1002 * was execute(t, tpgrp);
1003 */
1004 execute(t, tpgrp > 0 ? tpgrp : -1, NULL, NULL, TRUE);
1005 /* reset the error catcher to the old place */
1006 cleanup_pop_mark(omark);
1007 resexit(osetexit);
1008 if (haderr) {
1009 haderr = 0;
1010 /*
1011 * Either precmd, or cwdcmd, or periodic had an error. Call it again so
1012 * that it is removed
1013 */
1014 if (precmd_active)
1015 precmd();
1016 if (postcmd_active)
1017 postcmd();
1018#ifdef notdef
1019 /*
1020 * XXX: On the other hand, just interrupting them causes an error too.
1021 * So if we hit ^C in the middle of cwdcmd or periodic the alias gets
1022 * removed. We don't want that. Note that we want to remove precmd
1023 * though, cause that could lead into an infinite loop. This should be
1024 * fixed correctly, but then haderr should give us the whole exit
1025 * status not just true or false.
1026 */
1027 else if (cwdcmd_active)
1028 cwd_cmd();
1029 else if (beepcmd_active)
1030 beep_cmd();
1031 else if (periodic_active)
1032 period_cmd();
1033#endif /* notdef */
1034 }
1035 cleanup_until(&w);
1036 pendjob();
1037 /* Restore status */
1038 setv(STRstatus, putn(status), VAR_READWRITE);
1039}
1040
1041void
1042setalarm(int lck)
1043{
1044 struct varent *vp;
1045 Char *cp;
1046 unsigned alrm_time = 0, logout_time, lock_time;
1047 time_t cl, nl, sched_dif;
1048
1049 if ((vp = adrof(STRautologout)) != NULL && vp->vec != NULL) {
1050 if ((cp = vp->vec[0]) != 0) {
1051 if ((logout_time = (unsigned) atoi(short2str(cp)) * 60) > 0) {
1052#ifdef SOLARIS2
1053 /*
1054 * Solaris alarm(2) uses a timer based in clock ticks
1055 * internally so it multiplies our value with CLK_TCK...
1056 * Of course that can overflow leading to unexpected
1057 * results, so we clip it here. Grr. Where is that
1058 * documented folks?
1059 */
1060 if (logout_time >= 0x7fffffff / CLK_TCK)
1061 logout_time = 0x7fffffff / CLK_TCK;
1062#endif /* SOLARIS2 */
1063 alrm_time = logout_time;
1064 alm_fun = auto_logout;
1065 }
1066 }
1067 if ((cp = vp->vec[1]) != 0) {
1068 if ((lock_time = (unsigned) atoi(short2str(cp)) * 60) > 0) {
1069 if (lck) {
1070 if (alrm_time == 0 || lock_time < alrm_time) {
1071 alrm_time = lock_time;
1072 alm_fun = auto_lock;
1073 }
1074 }
1075 else /* lock_time always < alrm_time */
1076 if (alrm_time)
1077 alrm_time -= lock_time;
1078 }
1079 }
1080 }
1081 if ((nl = sched_next()) != -1) {
1082 (void) time(&cl);
1083 sched_dif = nl > cl ? nl - cl : 0;
1084 if ((alrm_time == 0) || ((unsigned) sched_dif < alrm_time)) {
1085 alrm_time = ((unsigned) sched_dif) + 1;
1086 alm_fun = sched_run;
1087 }
1088 }
1089 alrmcatch_disabled = 0;
1090 (void) alarm(alrm_time); /* Autologout ON */
1091}
1092
1093#undef RMDEBUG /* For now... */
1094
1095void
1096rmstar(struct wordent *cp)
1097{
1098 struct wordent *we, *args;
1099 struct wordent *tmp, *del;
1100
1101#ifdef RMDEBUG
1102 static Char STRrmdebug[] = {'r', 'm', 'd', 'e', 'b', 'u', 'g', '\0'};
1103 Char *tag;
1104#endif /* RMDEBUG */
1105 Char *charac;
1106 char c;
1107 int ask, doit, star = 0, silent = 0;
1108
1109 if (!adrof(STRrmstar))
1110 return;
1111#ifdef RMDEBUG
1112 tag = varval(STRrmdebug);
1113#endif /* RMDEBUG */
1114 we = cp->next;
1115 while (*we->word == ';' && we != cp)
1116 we = we->next;
1117 while (we != cp) {
1118#ifdef RMDEBUG
1119 if (*tag)
1120 xprintf(CGETS(22, 7, "parsing command line\n"));
1121#endif /* RMDEBUG */
1122 if (!Strcmp(we->word, STRrm)) {
1123 args = we->next;
1124 ask = (*args->word != '-');
1125 while (*args->word == '-' && !silent) { /* check options */
1126 for (charac = (args->word + 1); *charac && !silent; charac++)
1127 silent = (*charac == 'i' || *charac == 'f');
1128 args = args->next;
1129 }
1130 ask = (ask || (!ask && !silent));
1131 if (ask) {
1132 for (; !star && *args->word != ';'
1133 && args != cp; args = args->next)
1134 if (!Strcmp(args->word, STRstar))
1135 star = 1;
1136 if (ask && star) {
57e3f2b5 1137 xprintf("%s", CGETS(22, 8,
7d8fb588
MS
1138 "Do you really want to delete all files? [n/y] "));
1139 flush();
1140 (void) force_read(SHIN, &c, 1);
1141 /*
1142 * Perhaps we should use the yesexpr from the
1143 * actual locale
1144 */
1145 doit = (strchr(CGETS(22, 14, "Yy"), c) != NULL);
1146 while (c != '\n' && force_read(SHIN, &c, 1) == 1)
1147 continue;
1148 if (!doit) {
1149 /* remove the command instead */
1150#ifdef RMDEBUG
1151 if (*tag)
1152 xprintf(CGETS(22, 9,
1153 "skipping deletion of files!\n"));
1154#endif /* RMDEBUG */
1155 for (tmp = we;
1156 *tmp->word != '\n' &&
1157 *tmp->word != ';' && tmp != cp;) {
1158 tmp->prev->next = tmp->next;
1159 tmp->next->prev = tmp->prev;
1160 xfree(tmp->word);
1161 del = tmp;
1162 tmp = tmp->next;
1163 xfree(del);
1164 }
1165 if (*tmp->word == ';') {
1166 tmp->prev->next = tmp->next;
1167 tmp->next->prev = tmp->prev;
1168 xfree(tmp->word);
1169 del = tmp;
1170 tmp = tmp->next;
1171 xfree(del);
1172 }
1173 we = tmp;
1174 continue;
1175 }
1176 }
1177 }
1178 }
1179 for (we = we->next;
1180 *we->word != ';' && we != cp;
1181 we = we->next)
1182 continue;
1183 if (*we->word == ';')
1184 we = we->next;
1185 }
1186#ifdef RMDEBUG
1187 if (*tag) {
1188 xprintf(CGETS(22, 10, "command line now is:\n"));
1189 for (we = cp->next; we != cp; we = we->next)
1190 xprintf("%S ", we->word);
1191 }
1192#endif /* RMDEBUG */
1193 return;
1194}
1195
1196#ifdef BSDJOBS
1197/* Check if command is in continue list
1198 and do a "aliasing" if it exists as a job in background */
1199
1200#undef CNDEBUG /* For now */
1201void
1202continue_jobs(struct wordent *cp)
1203{
1204 struct wordent *we;
1205 struct process *pp, *np;
1206 Char *cmd, *continue_list, *continue_args_list;
1207
1208#ifdef CNDEBUG
1209 Char *tag;
1210 static Char STRcndebug[] =
1211 {'c', 'n', 'd', 'e', 'b', 'u', 'g', '\0'};
1212#endif /* CNDEBUG */
1213 int in_cont_list, in_cont_arg_list;
1214
1215
1216#ifdef CNDEBUG
1217 tag = varval(STRcndebug);
1218#endif /* CNDEBUG */
1219 continue_list = varval(STRcontinue);
1220 continue_args_list = varval(STRcontinue_args);
1221 if (*continue_list == '\0' && *continue_args_list == '\0')
1222 return;
1223
1224 we = cp->next;
1225 while (*we->word == ';' && we != cp)
1226 we = we->next;
1227 while (we != cp) {
1228#ifdef CNDEBUG
1229 if (*tag)
1230 xprintf(CGETS(22, 11, "parsing command line\n"));
1231#endif /* CNDEBUG */
1232 cmd = we->word;
1233 in_cont_list = inlist(continue_list, cmd);
1234 in_cont_arg_list = inlist(continue_args_list, cmd);
1235 if (in_cont_list || in_cont_arg_list) {
1236#ifdef CNDEBUG
1237 if (*tag)
1238 xprintf(CGETS(22, 12, "in one of the lists\n"));
1239#endif /* CNDEBUG */
1240 np = NULL;
1241 for (pp = proclist.p_next; pp; pp = pp->p_next) {
1242 if (prefix(cmd, pp->p_command)) {
1243 if (pp->p_index) {
1244 np = pp;
1245 break;
1246 }
1247 }
1248 }
1249 if (np) {
1250 insert(we, in_cont_arg_list);
1251 }
1252 }
1253 for (we = we->next;
1254 *we->word != ';' && we != cp;
1255 we = we->next)
1256 continue;
1257 if (*we->word == ';')
1258 we = we->next;
1259 }
1260#ifdef CNDEBUG
1261 if (*tag) {
1262 xprintf(CGETS(22, 13, "command line now is:\n"));
1263 for (we = cp->next; we != cp; we = we->next)
1264 xprintf("%S ", we->word);
1265 }
1266#endif /* CNDEBUG */
1267 return;
1268}
1269
1270/* The actual "aliasing" of for backgrounds() is done here
1271 with the aid of insert_we(). */
1272static void
1273insert(struct wordent *pl, int file_args)
1274{
1275 struct wordent *now, *last;
1276 Char *cmd, *bcmd, *cp1, *cp2;
1277 size_t cmd_len;
1278 Char *upause = STRunderpause;
1279 size_t p_len = Strlen(upause);
1280
1281 cmd_len = Strlen(pl->word);
1282 cmd = xcalloc(1, (cmd_len + 1) * sizeof(Char));
1283 (void) Strcpy(cmd, pl->word);
1284/* Do insertions at beginning, first replace command word */
1285
1286 if (file_args) {
1287 now = pl;
1288 xfree(now->word);
1289 now->word = xcalloc(1, 5 * sizeof(Char));
1290 (void) Strcpy(now->word, STRecho);
1291
1292 now = xcalloc(1, sizeof(struct wordent));
1293 now->word = xcalloc(1, 6 * sizeof(Char));
1294 (void) Strcpy(now->word, STRbackqpwd);
1295 insert_we(now, pl);
1296
1297 for (last = now; *last->word != '\n' && *last->word != ';';
1298 last = last->next)
1299 continue;
1300
1301 now = xcalloc(1, sizeof(struct wordent));
1302 now->word = xcalloc(1, 2 * sizeof(Char));
1303 (void) Strcpy(now->word, STRgt);
1304 insert_we(now, last->prev);
1305
1306 now = xcalloc(1, sizeof(struct wordent));
1307 now->word = xcalloc(1, 2 * sizeof(Char));
1308 (void) Strcpy(now->word, STRbang);
1309 insert_we(now, last->prev);
1310
1311 now = xcalloc(1, sizeof(struct wordent));
1312 now->word = xcalloc(1, (cmd_len + p_len + 4) * sizeof(Char));
1313 cp1 = now->word;
1314 cp2 = cmd;
1315 *cp1++ = '~';
1316 *cp1++ = '/';
1317 *cp1++ = '.';
1318 while ((*cp1++ = *cp2++) != '\0')
1319 continue;
1320 cp1--;
1321 cp2 = upause;
1322 while ((*cp1++ = *cp2++) != '\0')
1323 continue;
1324 insert_we(now, last->prev);
1325
1326 now = xcalloc(1, sizeof(struct wordent));
1327 now->word = xcalloc(1, 2 * sizeof(Char));
1328 (void) Strcpy(now->word, STRsemi);
1329 insert_we(now, last->prev);
1330 bcmd = xcalloc(1, (cmd_len + 2) * sizeof(Char));
1331 *bcmd = '%';
1332 Strcpy(bcmd + 1, cmd);
1333 now = xcalloc(1, sizeof(struct wordent));
1334 now->word = bcmd;
1335 insert_we(now, last->prev);
1336 }
1337 else {
1338 struct wordent *del;
1339
1340 now = pl;
1341 xfree(now->word);
1342 now->word = xcalloc(1, (cmd_len + 2) * sizeof(Char));
1343 *now->word = '%';
1344 Strcpy(now->word + 1, cmd);
1345 for (now = now->next;
1346 *now->word != '\n' && *now->word != ';' && now != pl;) {
1347 now->prev->next = now->next;
1348 now->next->prev = now->prev;
1349 xfree(now->word);
1350 del = now;
1351 now = now->next;
1352 xfree(del);
1353 }
1354 }
1355}
1356
1357static void
1358insert_we(struct wordent *new, struct wordent *where)
1359{
1360
1361 new->prev = where;
1362 new->next = where->next;
1363 where->next = new;
1364 new->next->prev = new;
1365}
1366
1367static int
1368inlist(Char *list, Char *name)
1369{
1370 Char *l, *n;
1371
1372 l = list;
1373 n = name;
1374
1375 while (*l && *n) {
1376 if (*l == *n) {
1377 l++;
1378 n++;
1379 if (*n == '\0' && (*l == ' ' || *l == '\0'))
1380 return (1);
1381 else
1382 continue;
1383 }
1384 else {
1385 while (*l && *l != ' ')
1386 l++; /* skip to blank */
1387 while (*l && *l == ' ')
1388 l++; /* and find first nonblank character */
1389 n = name;
1390 }
1391 }
1392 return (0);
1393}
1394
1395#endif /* BSDJOBS */
1396
1397
1398/*
1399 * Implement a small cache for tilde names. This is used primarily
1400 * to expand tilde names to directories, but also
1401 * we can find users from their home directories for the tilde
1402 * prompt, on machines where yp lookup is slow this can be a big win...
1403 * As with any cache this can run out of sync, rehash can sync it again.
1404 */
1405static struct tildecache {
1406 Char *user;
1407 Char *home;
1408 size_t hlen;
1409} *tcache = NULL;
1410
1411#define TILINCR 10
1412size_t tlength = 0;
1413static size_t tsize = TILINCR;
1414
1415static int
1416tildecompare(const void *xp1, const void *xp2)
1417{
1418 const struct tildecache *p1, *p2;
1419
1420 p1 = xp1;
1421 p2 = xp2;
1422 return Strcmp(p1->user, p2->user);
1423}
1424
1425static Char *
1426gethomedir(const Char *us)
1427{
1428 struct passwd *pp;
1429#ifdef HESIOD
1430 char **res, **res1, *cp;
1431 Char *rp;
1432#endif /* HESIOD */
1433
1434 pp = xgetpwnam(short2str(us));
1435#ifdef YPBUGS
1436 fix_yp_bugs();
1437#endif /* YPBUGS */
1438 if (pp != NULL) {
1439#if 0
1440 /* Don't return if root */
1441 if (pp->pw_dir[0] == '/' && pp->pw_dir[1] == '\0')
1442 return NULL;
1443 else
1444#endif
1445 return Strsave(str2short(pp->pw_dir));
1446 }
1447#ifdef HESIOD
1448 res = hes_resolve(short2str(us), "filsys");
1449 rp = NULL;
1450 if (res != NULL) {
1451 if ((*res) != NULL) {
1452 /*
1453 * Look at the first token to determine how to interpret
1454 * the rest of it.
1455 * Yes, strtok is evil (it's not thread-safe), but it's also
1456 * easy to use.
1457 */
1458 cp = strtok(*res, " ");
1459 if (strcmp(cp, "AFS") == 0) {
1460 /* next token is AFS pathname.. */
1461 cp = strtok(NULL, " ");
1462 if (cp != NULL)
1463 rp = Strsave(str2short(cp));
1464 } else if (strcmp(cp, "NFS") == 0) {
1465 cp = NULL;
1466 if ((strtok(NULL, " ")) && /* skip remote pathname */
1467 (strtok(NULL, " ")) && /* skip host */
1468 (strtok(NULL, " ")) && /* skip mode */
1469 (cp = strtok(NULL, " "))) {
1470 rp = Strsave(str2short(cp));
1471 }
1472 }
1473 }
1474 for (res1 = res; *res1; res1++)
1475 free(*res1);
1476#if 0
1477 /* Don't return if root */
1478 if (rp != NULL && rp[0] == '/' && rp[1] == '\0') {
1479 xfree(rp);
1480 rp = NULL;
1481 }
1482#endif
1483 return rp;
1484 }
1485#endif /* HESIOD */
1486 return NULL;
1487}
1488
1489Char *
1490gettilde(const Char *us)
1491{
1492 struct tildecache *bp1, *bp2, *bp;
1493 Char *hd;
1494
1495 /* Ignore NIS special names */
1496 if (*us == '+' || *us == '-')
1497 return NULL;
1498
1499 if (tcache == NULL)
1500 tcache = xmalloc(TILINCR * sizeof(struct tildecache));
1501 /*
1502 * Binary search
1503 */
1504 for (bp1 = tcache, bp2 = tcache + tlength; bp1 < bp2;) {
1505 int i;
1506
1507 bp = bp1 + ((bp2 - bp1) >> 1);
1508 if ((i = *us - *bp->user) == 0 && (i = Strcmp(us, bp->user)) == 0)
1509 return (bp->home);
1510 if (i < 0)
1511 bp2 = bp;
1512 else
1513 bp1 = bp + 1;
1514 }
1515 /*
1516 * Not in the cache, try to get it from the passwd file
1517 */
1518 hd = gethomedir(us);
1519 if (hd == NULL)
1520 return NULL;
1521
1522 /*
1523 * Update the cache
1524 */
1525 tcache[tlength].user = Strsave(us);
1526 tcache[tlength].home = hd;
1527 tcache[tlength++].hlen = Strlen(hd);
1528
1529 qsort(tcache, tlength, sizeof(struct tildecache), tildecompare);
1530
1531 if (tlength == tsize) {
1532 tsize += TILINCR;
1533 tcache = xrealloc(tcache, tsize * sizeof(struct tildecache));
1534 }
1535 return (hd);
1536}
1537
1538/*
1539 * Return the username if the directory path passed contains a
1540 * user's home directory in the tilde cache, otherwise return NULL
1541 * hm points to the place where the path became different.
1542 * Special case: Our own home directory.
1543 * If we are passed a null pointer, then we flush the cache.
1544 */
1545Char *
1546getusername(Char **hm)
1547{
1548 Char *h, *p;
1549 size_t i, j;
1550
1551 if (hm == NULL) {
1552 for (i = 0; i < tlength; i++) {
1553 xfree(tcache[i].home);
1554 xfree(tcache[i].user);
1555 }
1556 xfree(tcache);
1557 tlength = 0;
1558 tsize = TILINCR;
1559 tcache = NULL;
1560 return NULL;
1561 }
1562 p = *hm;
1563 if (((h = varval(STRhome)) != STRNULL) &&
1564 (Strncmp(p, h, j = Strlen(h)) == 0) &&
1565 (p[j] == '/' || p[j] == '\0')) {
1566 *hm = &p[j];
1567 return STRNULL;
1568 }
1569 for (i = 0; i < tlength; i++)
1570 if ((Strncmp(p, tcache[i].home, (j = tcache[i].hlen)) == 0) &&
1571 (p[j] == '/' || p[j] == '\0')) {
1572 *hm = &p[j];
1573 return tcache[i].user;
1574 }
1575 return NULL;
1576}
1577
1578
1579/*
1580 * set the shell-level var to 1 or apply change to it.
1581 */
1582void
1583shlvl(int val)
1584{
1585 char *cp;
1586
1587 if ((cp = getenv("SHLVL")) != NULL) {
1588
1589 if (loginsh)
1590 val = 1;
1591 else
1592 val += atoi(cp);
1593
1594 if (val <= 0) {
1595 if (adrof(STRshlvl) != NULL)
1596 unsetv(STRshlvl);
1597 Unsetenv(STRKSHLVL);
1598 }
1599 else {
1600 Char *p;
1601
1602 p = Itoa(val, 0, 0);
1603 cleanup_push(p, xfree);
1604 setv(STRshlvl, p, VAR_READWRITE);
1605 cleanup_ignore(p);
1606 cleanup_until(p);
1607 tsetenv(STRKSHLVL, p);
1608 }
1609 }
1610 else {
1611 setcopy(STRshlvl, STR1, VAR_READWRITE);
1612 tsetenv(STRKSHLVL, STR1);
1613 }
1614}
1615
1616
1617/* fixio():
1618 * Try to recover from a read error
1619 */
1620int
1621fixio(int fd, int e)
1622{
1623 switch (e) {
1624 case -1: /* Make sure that the code is reachable */
1625
1626#ifdef EWOULDBLOCK
1627 case EWOULDBLOCK:
1628# define FDRETRY
1629#endif /* EWOULDBLOCK */
1630
1631#if defined(POSIX) && defined(EAGAIN)
1632# if !defined(EWOULDBLOCK) || EWOULDBLOCK != EAGAIN
1633 case EAGAIN:
1634# define FDRETRY
1635# endif /* !EWOULDBLOCK || EWOULDBLOCK != EAGAIN */
1636#endif /* POSIX && EAGAIN */
1637
1638 e = 0;
1639#ifdef FDRETRY
1640# ifdef F_SETFL
1641/*
1642 * Great! we have on suns 3 flavors and 5 names...
1643 * I hope that will cover everything.
1644 * I added some more defines... many systems have different defines.
1645 * Rather than dealing with getting the right includes, we'll just
1646 * cover all the known possibilities here. -- sterling@netcom.com
1647 */
1648# ifndef O_NONBLOCK
1649# define O_NONBLOCK 0
1650# endif /* O_NONBLOCK */
1651# ifndef O_NDELAY
1652# define O_NDELAY 0
1653# endif /* O_NDELAY */
1654# ifndef FNBIO
1655# define FNBIO 0
1656# endif /* FNBIO */
1657# ifndef _FNBIO
1658# define _FNBIO 0
1659# endif /* _FNBIO */
1660# ifndef FNONBIO
1661# define FNONBIO 0
1662# endif /* FNONBIO */
1663# ifndef FNONBLOCK
1664# define FNONBLOCK 0
1665# endif /* FNONBLOCK */
1666# ifndef _FNONBLOCK
1667# define _FNONBLOCK 0
1668# endif /* _FNONBLOCK */
1669# ifndef FNDELAY
1670# define FNDELAY 0
1671# endif /* FNDELAY */
1672# ifndef _FNDELAY
1673# define _FNDELAY 0
1674# endif /* _FNDELAY */
1675# ifndef FNDLEAY /* Some linux versions have this typo */
1676# define FNDLEAY 0
1677# endif /* FNDLEAY */
1678 if ((e = fcntl(fd, F_GETFL, 0)) == -1)
1679 return -1;
1680
1681 e &= ~(O_NDELAY|O_NONBLOCK|FNBIO|_FNBIO|FNONBIO|FNONBLOCK|_FNONBLOCK|
1682 FNDELAY|_FNDELAY|FNDLEAY); /* whew! */
1683 if (fcntl(fd, F_SETFL, e) == -1)
1684 return -1;
1685 else
1686 e = 1;
1687# endif /* F_SETFL */
1688
1689# ifdef FIONBIO
1690 e = 0;
1691 if (ioctl(fd, FIONBIO, (ioctl_t) &e) == -1)
1692 return -1;
1693 else
1694 e = 1;
1695# endif /* FIONBIO */
1696
1697#endif /* FDRETRY */
1698 return e ? 0 : -1;
1699
1700 case EINTR:
1701 return 0;
1702
1703 default:
1704 return -1;
1705 }
1706}
1707
1708/* collate():
1709 * String collation
1710 */
1711int
1712collate(const Char *a, const Char *b)
1713{
1714 int rv;
1715#ifdef SHORT_STRINGS
1716 /* This strips the quote bit as a side effect */
1717 char *sa = strsave(short2str(a));
1718 char *sb = strsave(short2str(b));
1719#else
1720 char *sa = strip(strsave(a));
1721 char *sb = strip(strsave(b));
1722#endif /* SHORT_STRINGS */
1723
1724#if defined(NLS) && defined(HAVE_STRCOLL)
1725 errno = 0; /* strcoll sets errno, another brain-damage */
1726
1727 rv = strcoll(sa, sb);
1728
1729 /*
1730 * We should be checking for errno != 0, but some systems
1731 * forget to reset errno to 0. So we only check for the
1732 * only documented valid errno value for strcoll [EINVAL]
1733 */
1734 if (errno == EINVAL) {
1735 xfree(sa);
1736 xfree(sb);
1737 stderror(ERR_SYSTEM, "strcoll", strerror(errno));
1738 }
1739#else
1740 rv = strcmp(sa, sb);
1741#endif /* NLS && HAVE_STRCOLL */
1742
1743 xfree(sa);
1744 xfree(sb);
1745
1746 return rv;
1747}
1748
1749#ifdef HASHBANG
1750/*
1751 * From: peter@zeus.dialix.oz.au (Peter Wemm)
1752 * If exec() fails look first for a #! [word] [word] ....
1753 * If it is, splice the header into the argument list and retry.
1754 */
1755#define HACKBUFSZ 1024 /* Max chars in #! vector */
1756int
1757hashbang(int fd, Char ***vp)
1758{
1759 struct blk_buf sarg = BLK_BUF_INIT;
1760 char lbuf[HACKBUFSZ], *p, *ws;
1761#ifdef WINNT_NATIVE
1762 int fw = 0; /* found at least one word */
1763 int first_word = 1;
1764 char *real;
1765#endif /* WINNT_NATIVE */
1766
1767 if (xread(fd, lbuf, HACKBUFSZ) <= 0)
1768 return -1;
1769
1770 ws = 0; /* word started = 0 */
1771
1772 for (p = lbuf; p < &lbuf[HACKBUFSZ]; ) {
1773 switch (*p) {
1774 case ' ':
1775 case '\t':
57e3f2b5 1776#if defined(WINNT_NATIVE) || defined (__CYGWIN__)
7d8fb588 1777 case '\r':
57e3f2b5 1778#endif /* WINNT_NATIVE || __CYGWIN__ */
7d8fb588
MS
1779 if (ws) { /* a blank after a word.. save it */
1780 *p = '\0';
1781#ifdef WINNT_NATIVE
1782 if (first_word) {
1783 real = hb_subst(ws);
1784 if (real != NULL)
1785 ws = real;
1786 }
1787 fw = 1;
1788 first_word = 0;
1789#endif /* WINNT_NATIVE */
1790 bb_append(&sarg, SAVE(ws));
1791 ws = NULL;
1792 }
1793 p++;
1794 continue;
1795
1796 case '\0': /* Whoa!! what the hell happened */
1797 goto err;
1798
1799 case '\n': /* The end of the line. */
1800 if (
1801#ifdef WINNT_NATIVE
1802 fw ||
1803#endif /* WINNT_NATIVE */
1804 ws) { /* terminate the last word */
1805 *p = '\0';
1806#ifdef WINNT_NATIVE
1807 /* deal with the 1-word case */
1808 if (first_word) {
1809 real = hb_subst(ws);
1810 if (real != NULL)
1811 ws = real;
1812 }
1813#endif /* !WINNT_NATIVE */
1814 if (ws)
1815 bb_append(&sarg, SAVE(ws));
1816 }
1817 if (sarg.len > 0) {
1818 *vp = bb_finish(&sarg);
1819 return 0;
1820 }
1821 else
1822 goto err;
1823
1824 default:
1825 if (!ws) /* Start a new word? */
1826 ws = p;
1827 p++;
1828 break;
1829 }
1830 }
1831 err:
1832 bb_cleanup(&sarg);
1833 return -1;
1834}
1835#endif /* HASHBANG */
1836
1837#ifdef REMOTEHOST
1838
1839static void
1840palarm(int snum)
1841{
1842 USE(snum);
1843 _exit(1);
1844}
1845
1846static void
1847getremotehost(int dest_fd)
1848{
1849 const char *host = NULL;
1850#ifdef INET6
1851 struct sockaddr_storage saddr;
1852 static char hbuf[NI_MAXHOST];
1853#else
1854 struct hostent* hp;
1855 struct sockaddr_in saddr;
1856#endif
1857 socklen_t len = sizeof(saddr);
1858
1859#ifdef INET6
1860 if (getpeername(SHIN, (struct sockaddr *) &saddr, &len) != -1 &&
1861 (saddr.ss_family == AF_INET6 || saddr.ss_family == AF_INET)) {
1862 int flag = NI_NUMERICHOST;
1863
1864#ifdef NI_WITHSCOPEID
1865 flag |= NI_WITHSCOPEID;
1866#endif
1867 getnameinfo((struct sockaddr *)&saddr, len, hbuf, sizeof(hbuf),
1868 NULL, 0, flag);
1869 host = hbuf;
1870#else
1871 if (getpeername(SHIN, (struct sockaddr *) &saddr, &len) != -1 &&
1872 saddr.sin_family == AF_INET) {
1873#if 0
1874 if ((hp = gethostbyaddr((char *)&saddr.sin_addr, sizeof(struct in_addr),
1875 AF_INET)) != NULL)
1876 host = hp->h_name;
1877 else
1878#endif
1879 host = inet_ntoa(saddr.sin_addr);
1880#endif
1881 }
1882#ifdef HAVE_STRUCT_UTMP_UT_HOST
1883 else {
1884 char *ptr;
1885 char *name = utmphost();
1886 /* Avoid empty names and local X displays */
1887 if (name != NULL && *name != '\0' && *name != ':') {
1888 struct in_addr addr;
1889 char *sptr;
1890
1891 /* Look for host:display.screen */
1892 /*
1893 * There is conflict with IPv6 address and X DISPLAY. So,
1894 * we assume there is no IPv6 address in utmp and don't
1895 * touch here.
1896 */
1897 if ((sptr = strchr(name, ':')) != NULL)
1898 *sptr = '\0';
1899 /* Leave IPv4 address as is */
1900 /*
1901 * we use inet_addr here, not inet_aton because many systems
1902 * have not caught up yet.
1903 */
1904 addr.s_addr = inet_addr(name);
1905 if (addr.s_addr != (unsigned int)~0)
1906 host = name;
1907 else {
1908 if (sptr != name) {
1909#ifdef INET6
1910 char *s, *domain;
1911 char dbuf[MAXHOSTNAMELEN];
1912 struct addrinfo hints, *res = NULL;
1913
1914 memset(&hints, 0, sizeof(hints));
1915 hints.ai_family = PF_UNSPEC;
1916 hints.ai_socktype = SOCK_STREAM;
1917 hints.ai_flags = AI_PASSIVE | AI_CANONNAME;
1918 if (strlen(name) < utmphostsize())
1919 {
1920 if (getaddrinfo(name, NULL, &hints, &res) != 0)
1921 res = NULL;
1922 } else if (gethostname(dbuf, sizeof(dbuf)) == 0 &&
1923 (dbuf[sizeof(dbuf)-1] = '\0', /*FIXME: ugly*/
1924 (domain = strchr(dbuf, '.')) != NULL)) {
1925 for (s = strchr(name, '.');
1926 s != NULL; s = strchr(s + 1, '.')) {
1927 if (*(s + 1) != '\0' &&
1928 (ptr = strstr(domain, s)) != NULL) {
1929 char *cbuf;
1930
1931 cbuf = strspl(name, ptr);
1932 if (getaddrinfo(cbuf, NULL, &hints, &res) != 0)
1933 res = NULL;
1934 xfree(cbuf);
1935 break;
1936 }
1937 }
1938 }
1939 if (res != NULL) {
1940 if (res->ai_canonname != NULL) {
1941 strncpy(hbuf, res->ai_canonname, sizeof(hbuf));
1942 host = hbuf;
1943 }
1944 freeaddrinfo(res);
1945 }
1946#else
1947 if ((hp = gethostbyname(name)) == NULL) {
1948 /* Try again eliminating the trailing domain */
1949 if ((ptr = strchr(name, '.')) != NULL) {
1950 *ptr = '\0';
1951 if ((hp = gethostbyname(name)) != NULL)
1952 host = hp->h_name;
1953 *ptr = '.';
1954 }
1955 }
1956 else
1957 host = hp->h_name;
1958#endif
1959 }
1960 }
1961 }
1962 }
1963#endif
1964
1965 if (host) {
1966 size_t left;
1967
1968 left = strlen(host);
1969 while (left != 0) {
1970 ssize_t res;
1971
1972 res = xwrite(dest_fd, host, left);
1973 if (res < 0)
1974 _exit(1);
1975 host += res;
1976 left -= res;
1977 }
1978 }
1979 _exit(0);
1980}
1981
1982/*
1983 * From: <lesv@ppvku.ericsson.se> (Lennart Svensson)
1984 */
1985void
1986remotehost(void)
1987{
1988 struct sigaction sa;
1989 struct strbuf hostname = strbuf_INIT;
1990 int fds[2], wait_options, status;
1991 pid_t pid, wait_res;
1992
1993 sa.sa_handler = SIG_DFL; /* Make sure a zombie is created */
1994 sigemptyset(&sa.sa_mask);
1995 sa.sa_flags = 0;
1996 sigaction(SIGCHLD, &sa, NULL);
1997 mypipe(fds);
1998 pid = fork();
1999 if (pid == 0) {
2000 sigset_t set;
2001 xclose(fds[0]);
2002 /* Don't get stuck if the resolver does not work! */
2003 signal(SIGALRM, palarm);
2004 sigemptyset(&set);
2005 sigaddset(&set, SIGALRM);
2006 (void)sigprocmask(SIG_UNBLOCK, &set, NULL);
2007 (void)alarm(2);
2008 getremotehost(fds[1]);
2009 /*NOTREACHED*/
2010 }
2011 xclose(fds[1]);
2012 for (;;) {
2013 char buf[BUFSIZE];
2014 ssize_t res;
2015
2016 res = xread(fds[0], buf, sizeof(buf));
2017 if (res == -1) {
2018 hostname.len = 0;
2019 wait_options = WNOHANG;
2020 goto done;
2021 }
2022 if (res == 0)
2023 break;
2024 strbuf_appendn(&hostname, buf, res);
2025 }
2026 wait_options = 0;
2027 done:
2028 xclose(fds[0]);
2029 while ((wait_res = waitpid(pid, &status, wait_options)) == -1
2030 && errno == EINTR)
2031 handle_pending_signals();
2032 cleanup_push(&hostname, strbuf_cleanup);
2033 if (wait_res == pid && WIFEXITED(status) && WEXITSTATUS(status) == 0) {
2034 strbuf_terminate(&hostname);
2035 tsetenv(STRREMOTEHOST, str2short(hostname.s));
2036 }
2037 cleanup_until(&hostname);
2038
2039#ifdef YPBUGS
2040 /* From: casper@fwi.uva.nl (Casper H.S. Dik), for Solaris 2.3 */
2041 fix_yp_bugs();
2042#endif /* YPBUGS */
2043
2044}
2045#endif /* REMOTEHOST */
2046
2047#ifndef WINNT_NATIVE
2048/*
2049 * indicate if a terminal type is defined in terminfo/termcap
2050 * (by default the current term type). This allows ppl to look
2051 * for a working term type automatically in their login scripts
2052 * when using a terminal known as different things on different
2053 * platforms
2054 */
2055void
2056dotermname(Char **v, struct command *c)
2057{
2058 char *termtype;
2059 /*
2060 * Maximum size of a termcap record. We make it twice as large.
2061 */
2062 char termcap_buffer[2048];
2063
2064 USE(c);
2065 /* try to find which entry we should be looking for */
2066 termtype = (v[1] == NULL ? getenv("TERM") : short2str(v[1]));
2067 if (termtype == NULL) {
2068 /* no luck - the user didn't provide one and none is
2069 * specified in the environment
2070 */
2071 setcopy(STRstatus, STR1, VAR_READWRITE);
2072 return;
2073 }
2074
2075 /*
2076 * we use the termcap function - if we are using terminfo we
2077 * will end up with it's compatibility function
2078 * terminfo/termcap will be initialized with the new
2079 * type but we don't care because tcsh has cached all the things
2080 * it needs.
2081 */
2082 if (tgetent(termcap_buffer, termtype) == 1) {
2083 xprintf("%s\n", termtype);
2084 setcopy(STRstatus, STR0, VAR_READWRITE);
2085 } else
2086 setcopy(STRstatus, STR1, VAR_READWRITE);
2087}
2088#endif /* WINNT_NATIVE */