contrib/tcsh-6/tc.func.c

   1 /* $Header: /p/tcsh/cvsroot/tcsh/tc.func.c,v 3.136 2006/09/01 12:51:35 christos Exp $ */
   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
  35 RCSID("$tcsh: tc.func.c,v 3.136 2006/09/01 12:51:35 christos Exp $")
  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>
  50 long ka_UserAuthenticateGeneral();
  51 #endif /* AFS */
  52
  53 #ifdef TESLA
  54 extern int do_logout;
  55 #endif /* TESLA */
  56 extern time_t t_period;
  57 extern int just_signaled;
  58 static int precmd_active = 0;
  59 static int jobcmd_active = 0; /* GrP */
  60 static int postcmd_active = 0;
  61 static int periodic_active = 0;
  62 static int cwdcmd_active = 0;   /* PWP: for cwd_cmd */
  63 static int beepcmd_active = 0;
  64 static void (*alm_fun)(void) = NULL;
  65
  66 static  void     auto_logout    (void);
  67 static  char    *xgetpass       (const char *);
  68 static  void     auto_lock      (void);
  69 #ifdef BSDJOBS
  70 static  void     insert         (struct wordent *, int);
  71 static  void     insert_we      (struct wordent *, struct wordent *);
  72 static  int      inlist         (Char *, Char *);
  73 #endif /* BSDJOBS */
  74 static  int      tildecompare   (const void *, const void *);
  75 static  Char    *gethomedir     (const Char *);
  76 #ifdef REMOTEHOST
  77 static  void     palarm         (int);
  78 static  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
  98 Char   *
  99 expand_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
 142 Char   *
 143 sprlex(const struct wordent *sp0)
 144 {
 145     return expand_lex(sp0, 0, INT_MAX);
 146 }
 147
 148
 149 Char *
 150 Itoa(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*/
 192 void
 193 dolist(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
 380 extern int GotTermCaps;
 381
 382 /*ARGSUSED*/
 383 void
 384 dotelltc(Char **v, struct command *c)
 385 {
 386     USE(v);
 387     USE(c);
 388     if (!GotTermCaps)
 389         GetTermCaps();
 390     TellTC();
 391 }
 392
 393 /*ARGSUSED*/
 394 void
 395 doechotc(Char **v, struct command *c)
 396 {
 397     USE(c);
 398     if (!GotTermCaps)
 399         GetTermCaps();
 400     EchoTC(++v);
 401 }
 402
 403 /*ARGSUSED*/
 404 void
 405 dosettc(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  */
 429 int
 430 cmd_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*/
 465 void
 466 dowhich(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
 487 struct process *
 488 find_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
 562 void
 563 fg_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
 598 static char *
 599 xgetpass(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
 635     cleanup_until(&osa);
 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*/
 658 static void
 659 auto_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
 761 static void
 762 auto_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
 778 void
 779 alrmcatch(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  */
 794 void
 795 precmd(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);
 801         xprintf(CGETS(22, 3, "Faulty alias 'precmd' removed.\n"));
 802         goto leave;
 803     }
 804     precmd_active = 1;
 805     if (!whyles && adrof1(STRprecmd, &aliases))
 806         aliasrun(1, STRprecmd, NULL);
 807 leave:
 808     precmd_active = 0;
 809     cleanup_until(&pintr_disabled);
 810 }
 811
 812 void
 813 postcmd(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);
 819         xprintf(CGETS(22, 3, "Faulty alias 'postcmd' removed.\n"));
 820         goto leave;
 821     }
 822     postcmd_active = 1;
 823     if (!whyles && adrof1(STRpostcmd, &aliases))
 824         aliasrun(1, STRpostcmd, NULL);
 825 leave:
 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  */
 836 void
 837 cwd_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);
 843         xprintf(CGETS(22, 4, "Faulty alias 'cwdcmd' removed.\n"));
 844         goto leave;
 845     }
 846     cwdcmd_active = 1;
 847     if (!whyles && adrof1(STRcwdcmd, &aliases))
 848         aliasrun(1, STRcwdcmd, NULL);
 849 leave:
 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  */
 858 void
 859 beep_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);
 865         xprintf(CGETS(22, 5, "Faulty alias 'beepcmd' removed.\n"));
 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  */
 882 void
 883 period_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);
 892         xprintf(CGETS(22, 6, "Faulty alias 'periodic' removed.\n"));
 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     }
 909 leave:
 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  */
 923 void
 924 job_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);
 930         xprintf(CGETS(22, 14, "Faulty alias 'jobcmd' removed.\n"));
 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     }
 939 leave:
 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  */
 950 void
 951 aliasrun(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
1041 void
1042 setalarm(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
1095 void
1096 rmstar(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) {
1137                     xprintf(CGETS(22, 8,
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 */
1201 void
1202 continue_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().   */
1272 static void
1273 insert(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
1357 static void
1358 insert_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
1367 static int
1368 inlist(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  */
1405 static struct tildecache {
1406     Char   *user;
1407     Char   *home;
1408     size_t  hlen;
1409 }      *tcache = NULL;
1410
1411 #define TILINCR 10
1412 size_t tlength = 0;
1413 static size_t tsize = TILINCR;
1414
1415 static int
1416 tildecompare(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
1425 static Char *
1426 gethomedir(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
1489 Char   *
1490 gettilde(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  */
1545 Char   *
1546 getusername(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  */
1582 void
1583 shlvl(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  */
1620 int
1621 fixio(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  */
1711 int
1712 collate(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 */
1756 int
1757 hashbang(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':
1776 #ifdef WINNT_NATIVE
1777         case '\r':
1778 #endif /* WINNT_NATIVE */
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
1839 static void
1840 palarm(int snum)
1841 {
1842     USE(snum);
1843     _exit(1);
1844 }
1845
1846 static void
1847 getremotehost(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  */
1985 void
1986 remotehost(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  */
2055 void
2056 dotermname(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 */