contrib/tcsh-6/sh.func.c

   1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.func.c,v 3.162 2011/02/26 00:07:06 christos Exp $ */
   2 /*
   3  * sh.func.c: csh builtin functions
   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: sh.func.c,v 3.162 2011/02/26 00:07:06 christos Exp $")
  36
  37 #include "ed.h"
  38 #include "tw.h"
  39 #include "tc.h"
  40 #ifdef WINNT_NATIVE
  41 #include "nt.const.h"
  42 #endif /* WINNT_NATIVE */
  43
  44 #if defined (NLS_CATALOGS) && defined(HAVE_ICONV)
  45 static iconv_t catgets_iconv; /* Or (iconv_t)-1 */
  46 #endif
  47
  48 /*
  49  * C shell
  50  */
  51
  52 extern int MapsAreInited;
  53 extern int NLSMapsAreInited;
  54 extern int GotTermCaps;
  55
  56 static int zlast = -1;
  57
  58 static  void    islogin         (void);
  59 static  void    preread         (void);
  60 static  void    doagain         (void);
  61 static  const char *isrchx      (int);
  62 static  void    search          (int, int, Char *);
  63 static  int     getword         (struct Strbuf *);
  64 static  struct wordent  *histgetword    (struct wordent *);
  65 static  void    toend           (void);
  66 static  void    xecho           (int, Char **);
  67 static  int     islocale_var    (Char *);
  68 static  void    wpfree          (struct whyle *);
  69
  70 const struct biltins *
  71 isbfunc(struct command *t)
  72 {
  73     Char *cp = t->t_dcom[0];
  74     const struct biltins *bp, *bp1, *bp2;
  75     static struct biltins label = {"", dozip, 0, 0};
  76     static struct biltins foregnd = {"%job", dofg1, 0, 0};
  77     static struct biltins backgnd = {"%job &", dobg1, 0, 0};
  78
  79     /*
  80      * We never match a builtin that has quoted the first
  81      * character; this has been the traditional way to escape
  82      * builtin commands.
  83      */
  84     if (*cp & QUOTE)
  85         return NULL;
  86
  87     if (*cp != ':' && lastchr(cp) == ':') {
  88         label.bname = short2str(cp);
  89         return (&label);
  90     }
  91     if (*cp == '%') {
  92         if (t->t_dflg & F_AMPERSAND) {
  93             t->t_dflg &= ~F_AMPERSAND;
  94             backgnd.bname = short2str(cp);
  95             return (&backgnd);
  96         }
  97         foregnd.bname = short2str(cp);
  98         return (&foregnd);
  99     }
 100 #ifdef WARP
 101     /*
 102      * This is a perhaps kludgy way to determine if the warp builtin is to be
 103      * acknowledged or not.  If checkwarp() fails, then we are to assume that
 104      * the warp command is invalid, and carry on as we would handle any other
 105      * non-builtin command.         -- JDK 2/4/88
 106      */
 107     if (eq(STRwarp, cp) && !checkwarp()) {
 108         return (0);             /* this builtin disabled */
 109     }
 110 #endif /* WARP */
 111     /*
 112      * Binary search Bp1 is the beginning of the current search range. Bp2 is
 113      * one past the end.
 114      */
 115     for (bp1 = bfunc, bp2 = bfunc + nbfunc; bp1 < bp2;) {
 116         int i;
 117
 118         bp = bp1 + ((bp2 - bp1) >> 1);
 119         if ((i = ((char) *cp) - *bp->bname) == 0 &&
 120             (i = StrQcmp(cp, str2short(bp->bname))) == 0)
 121             return bp;
 122         if (i < 0)
 123             bp2 = bp;
 124         else
 125             bp1 = bp + 1;
 126     }
 127 #ifdef WINNT_NATIVE
 128     return nt_check_additional_builtins(cp);
 129 #endif /*WINNT_NATIVE*/
 130     return (0);
 131 }
 132
 133 void
 134 func(struct command *t, const struct biltins *bp)
 135 {
 136     int     i;
 137
 138     xechoit(t->t_dcom);
 139     setname(bp->bname);
 140     i = blklen(t->t_dcom) - 1;
 141     if (i < bp->minargs)
 142         stderror(ERR_NAME | ERR_TOOFEW);
 143     if (i > bp->maxargs)
 144         stderror(ERR_NAME | ERR_TOOMANY);
 145     (*bp->bfunct) (t->t_dcom, t);
 146 }
 147
 148 /*ARGSUSED*/
 149 void
 150 doonintr(Char **v, struct command *c)
 151 {
 152     Char *cp;
 153     Char *vv = v[1];
 154
 155     USE(c);
 156     if (parintr.sa_handler == SIG_IGN)
 157         return;
 158     if (setintr && intty)
 159         stderror(ERR_NAME | ERR_TERMINAL);
 160     cp = gointr;
 161     gointr = 0;
 162     xfree(cp);
 163     if (vv == 0) {
 164         if (setintr)
 165             sigset_interrupting(SIGINT, queue_pintr);
 166         else
 167             (void) signal(SIGINT, SIG_DFL);
 168         gointr = 0;
 169     }
 170     else if (eq((vv = strip(vv)), STRminus)) {
 171         (void) signal(SIGINT, SIG_IGN);
 172         gointr = Strsave(STRminus);
 173     }
 174     else {
 175         gointr = Strsave(vv);
 176         sigset_interrupting(SIGINT, queue_pintr);
 177     }
 178 }
 179
 180 /*ARGSUSED*/
 181 void
 182 donohup(Char **v, struct command *c)
 183 {
 184     USE(c);
 185     USE(v);
 186     if (intty)
 187         stderror(ERR_NAME | ERR_TERMINAL);
 188     if (setintr == 0) {
 189         (void) signal(SIGHUP, SIG_IGN);
 190         phup_disabled = 1;
 191 #ifdef CC
 192         submit(getpid());
 193 #endif /* CC */
 194     }
 195 }
 196
 197 /*ARGSUSED*/
 198 void
 199 dohup(Char **v, struct command *c)
 200 {
 201     USE(c);
 202     USE(v);
 203     if (intty)
 204         stderror(ERR_NAME | ERR_TERMINAL);
 205     if (setintr == 0)
 206         (void) signal(SIGHUP, SIG_DFL);
 207 }
 208
 209
 210 /*ARGSUSED*/
 211 void
 212 dozip(Char **v, struct command *c)
 213 {
 214     USE(c);
 215     USE(v);
 216 }
 217
 218 /*ARGSUSED*/
 219 void
 220 dofiletest(Char **v, struct command *c)
 221 {
 222     Char **globbed, **fileptr, *ftest, *res;
 223
 224     USE(c);
 225     if (*(ftest = *++v) != '-')
 226         stderror(ERR_NAME | ERR_FILEINQ);
 227     ++v;
 228
 229     v = glob_all_or_error(v);
 230     globbed = v;
 231     cleanup_push(globbed, blk_cleanup);
 232
 233     while (*(fileptr = v++) != '\0') {
 234         res = filetest(ftest, &fileptr, 0);
 235         cleanup_push(res, xfree);
 236         xprintf("%S", res);
 237         cleanup_until(res);
 238         if (*v)
 239             xprintf(" ");
 240     }
 241     xprintf("\n");
 242
 243     cleanup_until(globbed);
 244 }
 245
 246 void
 247 prvars(void)
 248 {
 249     plist(&shvhed, VAR_ALL);
 250 }
 251
 252 /*ARGSUSED*/
 253 void
 254 doalias(Char **v, struct command *c)
 255 {
 256     struct varent *vp;
 257     Char *p;
 258
 259     USE(c);
 260     v++;
 261     p = *v++;
 262     if (p == 0)
 263         plist(&aliases, VAR_ALL);
 264     else if (*v == 0) {
 265         vp = adrof1(strip(p), &aliases);
 266         if (vp && vp->vec)
 267             blkpr(vp->vec), xputchar('\n');
 268     }
 269     else {
 270         if (eq(p, STRalias) || eq(p, STRunalias)) {
 271             setname(short2str(p));
 272             stderror(ERR_NAME | ERR_DANGER);
 273         }
 274         set1(strip(p), saveblk(v), &aliases, VAR_READWRITE);
 275         tw_cmd_free();
 276     }
 277 }
 278
 279 /*ARGSUSED*/
 280 void
 281 unalias(Char **v, struct command *c)
 282 {
 283     USE(c);
 284     unset1(v, &aliases);
 285     tw_cmd_free();
 286 }
 287
 288 /*ARGSUSED*/
 289 void
 290 dologout(Char **v, struct command *c)
 291 {
 292     USE(c);
 293     USE(v);
 294     islogin();
 295     goodbye(NULL, NULL);
 296 }
 297
 298 /*ARGSUSED*/
 299 void
 300 dologin(Char **v, struct command *c)
 301 {
 302 #ifdef WINNT_NATIVE
 303     USE(c);
 304     USE(v);
 305 #else /* !WINNT_NATIVE */
 306     char **p = short2blk(v);
 307
 308     USE(c);
 309     cleanup_push((Char **)p, blk_cleanup);
 310     islogin();
 311     rechist(NULL, adrof(STRsavehist) != NULL);
 312     sigaction(SIGTERM, &parterm, NULL);
 313     (void) execv(_PATH_BIN_LOGIN, p);
 314     (void) execv(_PATH_USRBIN_LOGIN, p);
 315     cleanup_until((Char **)p);
 316     untty();
 317     xexit(1);
 318 #endif /* !WINNT_NATIVE */
 319 }
 320
 321
 322 #ifdef NEWGRP
 323 /*ARGSUSED*/
 324 void
 325 donewgrp(Char **v, struct command *c)
 326 {
 327     char **p;
 328     if (chkstop == 0 && setintr)
 329         panystop(0);
 330     sigaction(SIGTERM, &parterm, NULL);
 331     p = short2blk(v);
 332     /*
 333      * From Beto Appleton (beto@aixwiz.austin.ibm.com)
 334      * Newgrp can take 2 arguments...
 335      */
 336     (void) execv(_PATH_BIN_NEWGRP, p);
 337     (void) execv(_PATH_USRBIN_NEWGRP, p);
 338     blkfree((Char **) p);
 339     untty();
 340     xexit(1);
 341 }
 342 #endif /* NEWGRP */
 343
 344 static void
 345 islogin(void)
 346 {
 347     if (chkstop == 0 && setintr)
 348         panystop(0);
 349     if (loginsh)
 350         return;
 351     stderror(ERR_NOTLOGIN);
 352 }
 353
 354 void
 355 doif(Char **v, struct command *kp)
 356 {
 357     int i;
 358     Char **vv;
 359
 360     v++;
 361     i = noexec ? 1 : expr(&v);
 362     vv = v;
 363     if (*vv == NULL)
 364         stderror(ERR_NAME | ERR_EMPTYIF);
 365     if (eq(*vv, STRthen)) {
 366         if (*++vv)
 367             stderror(ERR_NAME | ERR_IMPRTHEN);
 368         setname(short2str(STRthen));
 369         /*
 370          * If expression was zero, then scan to else , otherwise just fall into
 371          * following code.
 372          */
 373         if (!i)
 374             search(TC_IF, 0, NULL);
 375         return;
 376     }
 377     /*
 378      * Simple command attached to this if. Left shift the node in this tree,
 379      * munging it so we can reexecute it.
 380      */
 381     if (i) {
 382         lshift(kp->t_dcom, vv - kp->t_dcom);
 383         reexecute(kp);
 384         donefds();
 385     }
 386 }
 387
 388 /*
 389  * Reexecute a command, being careful not
 390  * to redo i/o redirection, which is already set up.
 391  */
 392 void
 393 reexecute(struct command *kp)
 394 {
 395     kp->t_dflg &= F_SAVE;
 396     kp->t_dflg |= F_REPEAT;
 397     /*
 398      * If tty is still ours to arbitrate, arbitrate it; otherwise dont even set
 399      * pgrp's as the jobs would then have no way to get the tty (we can't give
 400      * it to them, and our parent wouldn't know their pgrp, etc.
 401      */
 402     execute(kp, (tpgrp > 0 ? tpgrp : -1), NULL, NULL, TRUE);
 403 }
 404
 405 /*ARGSUSED*/
 406 void
 407 doelse (Char **v, struct command *c)
 408 {
 409     USE(c);
 410     USE(v);
 411     if (!noexec)
 412         search(TC_ELSE, 0, NULL);
 413 }
 414
 415 /*ARGSUSED*/
 416 void
 417 dogoto(Char **v, struct command *c)
 418 {
 419     Char   *lp;
 420
 421     USE(c);
 422     lp = globone(v[1], G_ERROR);
 423     cleanup_push(lp, xfree);
 424     if (!noexec)
 425         gotolab(lp);
 426     cleanup_until(lp);
 427 }
 428
 429 void
 430 gotolab(Char *lab)
 431 {
 432     struct whyle *wp;
 433     /*
 434      * While we still can, locate any unknown ends of existing loops. This
 435      * obscure code is the WORST result of the fact that we don't really parse.
 436      */
 437     zlast = TC_GOTO;
 438     for (wp = whyles; wp; wp = wp->w_next)
 439         if (wp->w_end.type == TCSH_F_SEEK && wp->w_end.f_seek == 0) {
 440             search(TC_BREAK, 0, NULL);
 441             btell(&wp->w_end);
 442         }
 443         else {
 444             bseek(&wp->w_end);
 445         }
 446     search(TC_GOTO, 0, lab);
 447     /*
 448      * Eliminate loops which were exited.
 449      */
 450     wfree();
 451 }
 452
 453 /*ARGSUSED*/
 454 void
 455 doswitch(Char **v, struct command *c)
 456 {
 457     Char *cp, *lp;
 458
 459     USE(c);
 460     v++;
 461     if (!*v || *(*v++) != '(')
 462         stderror(ERR_SYNTAX);
 463     cp = **v == ')' ? STRNULL : *v++;
 464     if (*(*v++) != ')')
 465         v--;
 466     if (*v)
 467         stderror(ERR_SYNTAX);
 468     lp = globone(cp, G_ERROR);
 469     cleanup_push(lp, xfree);
 470     if (!noexec)
 471         search(TC_SWITCH, 0, lp);
 472     cleanup_until(lp);
 473 }
 474
 475 /*ARGSUSED*/
 476 void
 477 dobreak(Char **v, struct command *c)
 478 {
 479     USE(v);
 480     USE(c);
 481     if (whyles == NULL)
 482         stderror(ERR_NAME | ERR_NOTWHILE);
 483     if (!noexec)
 484         toend();
 485 }
 486
 487 /*ARGSUSED*/
 488 void
 489 doexit(Char **v, struct command *c)
 490 {
 491     USE(c);
 492
 493     if (chkstop == 0 && (intty || intact) && evalvec == 0)
 494         panystop(0);
 495     /*
 496      * Don't DEMAND parentheses here either.
 497      */
 498     v++;
 499     if (*v) {
 500         setv(STRstatus, putn(expr(&v)), VAR_READWRITE);
 501         if (*v)
 502             stderror(ERR_NAME | ERR_EXPRESSION);
 503     }
 504     btoeof();
 505 #if 0
 506     if (intty)
 507 #endif
 508     /* Always close, why only on ttys? */
 509         xclose(SHIN);
 510 }
 511
 512 /*ARGSUSED*/
 513 void
 514 doforeach(Char **v, struct command *c)
 515 {
 516     Char *cp, *sp;
 517     struct whyle *nwp;
 518     int gflag;
 519
 520     USE(c);
 521     v++;
 522     cp = sp = strip(*v);
 523     if (!letter(*cp))
 524         stderror(ERR_NAME | ERR_VARBEGIN);
 525     do {
 526         cp++;
 527     } while (alnum(*cp));
 528     if (*cp != '\0')
 529         stderror(ERR_NAME | ERR_VARALNUM);
 530     cp = *v++;
 531     if (v[0][0] != '(' || v[blklen(v) - 1][0] != ')')
 532         stderror(ERR_NAME | ERR_NOPAREN);
 533     v++;
 534     gflag = tglob(v);
 535     if (gflag) {
 536         v = globall(v, gflag);
 537         if (v == 0 && !noexec)
 538             stderror(ERR_NAME | ERR_NOMATCH);
 539     }
 540     else {
 541         v = saveblk(v);
 542         trim(v);
 543     }
 544     nwp = xcalloc(1, sizeof *nwp);
 545     nwp->w_fe = nwp->w_fe0 = v;
 546     btell(&nwp->w_start);
 547     nwp->w_fename = Strsave(cp);
 548     nwp->w_next = whyles;
 549     nwp->w_end.type = TCSH_F_SEEK;
 550     whyles = nwp;
 551     /*
 552      * Pre-read the loop so as to be more comprehensible to a terminal user.
 553      */
 554     zlast = TC_FOREACH;
 555     if (intty)
 556         preread();
 557     if (!noexec)
 558         doagain();
 559 }
 560
 561 /*ARGSUSED*/
 562 void
 563 dowhile(Char **v, struct command *c)
 564 {
 565     int status;
 566     int again = whyles != 0 &&
 567                           SEEKEQ(&whyles->w_start, &lineloc) &&
 568                           whyles->w_fename == 0;
 569
 570     USE(c);
 571     v++;
 572     /*
 573      * Implement prereading here also, taking care not to evaluate the
 574      * expression before the loop has been read up from a terminal.
 575      */
 576     if (noexec)
 577         status = 0;
 578     else if (intty && !again)
 579         status = !exp0(&v, 1);
 580     else
 581         status = !expr(&v);
 582     if (*v && !noexec)
 583         stderror(ERR_NAME | ERR_EXPRESSION);
 584     if (!again) {
 585         struct whyle *nwp = xcalloc(1, sizeof(*nwp));
 586
 587         nwp->w_start = lineloc;
 588         nwp->w_end.type = TCSH_F_SEEK;
 589         nwp->w_end.f_seek = 0;
 590         nwp->w_end.a_seek = 0;
 591         nwp->w_next = whyles;
 592         whyles = nwp;
 593         zlast = TC_WHILE;
 594         if (intty) {
 595             /*
 596              * The tty preread
 597              */
 598             preread();
 599             doagain();
 600             return;
 601         }
 602     }
 603     if (status)
 604         /* We ain't gonna loop no more, no more! */
 605         toend();
 606 }
 607
 608 static void
 609 preread(void)
 610 {
 611     int old_pintr_disabled;
 612
 613     whyles->w_end.type = TCSH_I_SEEK;
 614     if (setintr)
 615         pintr_push_enable(&old_pintr_disabled);
 616     search(TC_BREAK, 0, NULL);          /* read the expression in */
 617     if (setintr)
 618         cleanup_until(&old_pintr_disabled);
 619     btell(&whyles->w_end);
 620 }
 621
 622 /*ARGSUSED*/
 623 void
 624 doend(Char **v, struct command *c)
 625 {
 626     USE(v);
 627     USE(c);
 628     if (!whyles)
 629         stderror(ERR_NAME | ERR_NOTWHILE);
 630     btell(&whyles->w_end);
 631     if (!noexec)
 632         doagain();
 633 }
 634
 635 /*ARGSUSED*/
 636 void
 637 docontin(Char **v, struct command *c)
 638 {
 639     USE(v);
 640     USE(c);
 641     if (!whyles)
 642         stderror(ERR_NAME | ERR_NOTWHILE);
 643     if (!noexec)
 644         doagain();
 645 }
 646
 647 static void
 648 doagain(void)
 649 {
 650     /* Repeating a while is simple */
 651     if (whyles->w_fename == 0) {
 652         bseek(&whyles->w_start);
 653         return;
 654     }
 655     /*
 656      * The foreach variable list actually has a spurious word ")" at the end of
 657      * the w_fe list.  Thus we are at the of the list if one word beyond this
 658      * is 0.
 659      */
 660     if (!whyles->w_fe[1]) {
 661         dobreak(NULL, NULL);
 662         return;
 663     }
 664     setv(whyles->w_fename, quote(Strsave(*whyles->w_fe++)), VAR_READWRITE);
 665     bseek(&whyles->w_start);
 666 }
 667
 668 void
 669 dorepeat(Char **v, struct command *kp)
 670 {
 671     int i = 1;
 672
 673     do {
 674         i *= getn(v[1]);
 675         lshift(v, 2);
 676     } while (v[0] != NULL && Strcmp(v[0], STRrepeat) == 0);
 677     if (noexec)
 678         i = 1;
 679
 680     if (setintr) {
 681         pintr_disabled++;
 682         cleanup_push(&pintr_disabled, disabled_cleanup);
 683     }
 684     while (i > 0) {
 685         if (setintr && pintr_disabled == 1) {
 686             cleanup_until(&pintr_disabled);
 687             pintr_disabled++;
 688             cleanup_push(&pintr_disabled, disabled_cleanup);
 689         }
 690         reexecute(kp);
 691         --i;
 692     }
 693     if (setintr && pintr_disabled == 1)
 694         cleanup_until(&pintr_disabled);
 695     donefds();
 696 }
 697
 698 /*ARGSUSED*/
 699 void
 700 doswbrk(Char **v, struct command *c)
 701 {
 702     USE(v);
 703     USE(c);
 704     if (!noexec)
 705         search(TC_BRKSW, 0, NULL);
 706 }
 707
 708 int
 709 srchx(Char *cp)
 710 {
 711     struct srch *sp, *sp1, *sp2;
 712     int i;
 713
 714     /*
 715      * Ignore keywords inside heredocs
 716      */
 717     if (inheredoc)
 718         return -1;
 719
 720     /*
 721      * Binary search Sp1 is the beginning of the current search range. Sp2 is
 722      * one past the end.
 723      */
 724     for (sp1 = srchn, sp2 = srchn + nsrchn; sp1 < sp2;) {
 725         sp = sp1 + ((sp2 - sp1) >> 1);
 726         if ((i = *cp - *sp->s_name) == 0 &&
 727             (i = Strcmp(cp, str2short(sp->s_name))) == 0)
 728             return sp->s_value;
 729         if (i < 0)
 730             sp2 = sp;
 731         else
 732             sp1 = sp + 1;
 733     }
 734     return (-1);
 735 }
 736
 737 static const char *
 738 isrchx(int n)
 739 {
 740     struct srch *sp, *sp2;
 741
 742     for (sp = srchn, sp2 = srchn + nsrchn; sp < sp2; sp++)
 743         if (sp->s_value == n)
 744             return (sp->s_name);
 745     return ("");
 746 }
 747
 748
 749 static int Stype;
 750 static Char *Sgoal;
 751
 752 static void
 753 search(int type, int level, Char *goal)
 754 {
 755     struct Strbuf word = Strbuf_INIT;
 756     Char *cp;
 757     struct whyle *wp;
 758     int wlevel = 0;
 759     struct wordent *histent = NULL, *ohistent = NULL;
 760
 761     Stype = type;
 762     Sgoal = goal;
 763     if (type == TC_GOTO) {
 764         struct Ain a;
 765         a.type = TCSH_F_SEEK;
 766         a.f_seek = 0;
 767         a.a_seek = 0;
 768         bseek(&a);
 769     }
 770     cleanup_push(&word, Strbuf_cleanup);
 771     do {
 772
 773         if (intty) {
 774             histent = xmalloc(sizeof(*histent));
 775             ohistent = xmalloc(sizeof(*histent));
 776             ohistent->word = STRNULL;
 777             ohistent->next = histent;
 778             histent->prev = ohistent;
 779         }
 780
 781         if (intty && fseekp == feobp && aret == TCSH_F_SEEK)
 782             printprompt(1, isrchx(type == TC_BREAK ? zlast : type));
 783         /* xprintf("? "), flush(); */
 784         (void) getword(&word);
 785         Strbuf_terminate(&word);
 786
 787         if (intty && Strlen(word.s) > 0) {
 788             histent->word = Strsave(word.s);
 789             histent->next = xmalloc(sizeof(*histent));
 790             histent->next->prev = histent;
 791             histent = histent->next;
 792         }
 793
 794         switch (srchx(word.s)) {
 795
 796         case TC_ELSE:
 797             if (level == 0 && type == TC_IF)
 798                 goto end;
 799             break;
 800
 801         case TC_IF:
 802             while (getword(&word))
 803                 continue;
 804             if ((type == TC_IF || type == TC_ELSE) &&
 805                 eq(word.s, STRthen))
 806                 level++;
 807             break;
 808
 809         case TC_ENDIF:
 810             if (type == TC_IF || type == TC_ELSE)
 811                 level--;
 812             break;
 813
 814         case TC_FOREACH:
 815         case TC_WHILE:
 816             wlevel++;
 817             if (type == TC_BREAK)
 818                 level++;
 819             break;
 820
 821         case TC_END:
 822             if (type == TC_BRKSW) {
 823                 if (wlevel == 0) {
 824                     wp = whyles;
 825                     if (wp) {
 826                             whyles = wp->w_next;
 827                             wpfree(wp);
 828                     }
 829                 }
 830             }
 831             if (type == TC_BREAK)
 832                 level--;
 833             wlevel--;
 834             break;
 835
 836         case TC_SWITCH:
 837             if (type == TC_SWITCH || type == TC_BRKSW)
 838                 level++;
 839             break;
 840
 841         case TC_ENDSW:
 842             if (type == TC_SWITCH || type == TC_BRKSW)
 843                 level--;
 844             break;
 845
 846         case TC_LABEL:
 847             if (type == TC_GOTO && getword(&word) && eq(word.s, goal))
 848                 level = -1;
 849             break;
 850
 851         default:
 852             if (type != TC_GOTO && (type != TC_SWITCH || level != 0))
 853                 break;
 854             if (word.len == 0 || word.s[word.len - 1] != ':')
 855                 break;
 856             word.s[--word.len] = 0;
 857             if ((type == TC_GOTO && eq(word.s, goal)) ||
 858                 (type == TC_SWITCH && eq(word.s, STRdefault)))
 859                 level = -1;
 860             break;
 861
 862         case TC_CASE:
 863             if (type != TC_SWITCH || level != 0)
 864                 break;
 865             (void) getword(&word);
 866             if (word.len != 0 && word.s[word.len - 1] == ':')
 867                 word.s[--word.len] = 0;
 868             cp = strip(Dfix1(word.s));
 869             cleanup_push(cp, xfree);
 870             if (Gmatch(goal, cp))
 871                 level = -1;
 872             cleanup_until(cp);
 873             break;
 874
 875         case TC_DEFAULT:
 876             if (type == TC_SWITCH && level == 0)
 877                 level = -1;
 878             break;
 879         }
 880         if (intty) {
 881             ohistent->prev = histgetword(histent);
 882             ohistent->prev->next = ohistent;
 883             savehist(ohistent, 0);
 884             freelex(ohistent);
 885             xfree(ohistent);
 886         } else
 887             (void) getword(NULL);
 888     } while (level >= 0);
 889  end:
 890     cleanup_until(&word);
 891 }
 892
 893 static struct wordent *
 894 histgetword(struct wordent *histent)
 895 {
 896     int found = 0, first;
 897     eChar c, d;
 898     int e;
 899     struct Strbuf *tmp;
 900     tmp = xmalloc(sizeof(*tmp));
 901     tmp->size = 0;
 902     tmp->s = NULL;
 903     c = readc(1);
 904     d = 0;
 905     e = 0;
 906     for (;;) {
 907         tmp->len = 0;
 908         Strbuf_terminate (tmp);
 909         while (c == ' ' || c == '\t')
 910             c = readc(1);
 911         if (c == '#')
 912             do
 913                 c = readc(1);
 914             while (c != CHAR_ERR && c != '\n');
 915         if (c == CHAR_ERR)
 916             goto past;
 917         if (c == '\n')
 918             goto nl;
 919         unreadc(c);
 920         found = 1;
 921         first = 1;
 922         do {
 923             e = (c == '\\');
 924             c = readc(1);
 925             if (c == '\\' && !e) {
 926                 if ((c = readc(1)) == '\n') {
 927                     e = 1;
 928                     c = ' ';
 929                 } else {
 930                     unreadc(c);
 931                     c = '\\';
 932                 }
 933             }
 934             if ((c == '\'' || c == '"') && !e) {
 935                 if (d == 0)
 936                     d = c;
 937                 else if (d == c)
 938                     d = 0;
 939             }
 940             if (c == CHAR_ERR)
 941                 goto past;
 942
 943             Strbuf_append1(tmp, (Char) c);
 944
 945             if (!first && !d && c == '(' && !e) {
 946                 break;
 947             }
 948             first = 0;
 949         } while (d || e || (c != ' ' && c != '\t' && c != '\n'));
 950         tmp->len--;
 951         if (tmp->len) {
 952             Strbuf_terminate(tmp);
 953             histent->word = Strsave(tmp->s);
 954             histent->next = xmalloc(sizeof (*histent));
 955             histent->next->prev = histent;
 956             histent = histent->next;
 957         }
 958         if (c == '\n') {
 959         nl:
 960             tmp->len = 0;
 961             Strbuf_append1(tmp, (Char) c);
 962             Strbuf_terminate(tmp);
 963             histent->word = Strsave(tmp->s);
 964             return histent;
 965         }
 966     }
 967
 968 past:
 969     switch (Stype) {
 970
 971     case TC_IF:
 972         stderror(ERR_NAME | ERR_NOTFOUND, "then/endif");
 973         break;
 974
 975     case TC_ELSE:
 976         stderror(ERR_NAME | ERR_NOTFOUND, "endif");
 977         break;
 978
 979     case TC_BRKSW:
 980     case TC_SWITCH:
 981         stderror(ERR_NAME | ERR_NOTFOUND, "endsw");
 982         break;
 983
 984     case TC_BREAK:
 985         stderror(ERR_NAME | ERR_NOTFOUND, "end");
 986         break;
 987
 988     case TC_GOTO:
 989         setname(short2str(Sgoal));
 990         stderror(ERR_NAME | ERR_NOTFOUND, "label");
 991         break;
 992
 993     default:
 994         break;
 995     }
 996     /* NOTREACHED */
 997     return NULL;
 998 }
 999
1000 static int
1001 getword(struct Strbuf *wp)
1002 {
1003     int found = 0, first;
1004     eChar c, d;
1005
1006     if (wp)
1007         wp->len = 0;
1008     c = readc(1);
1009     d = 0;
1010     do {
1011         while (c == ' ' || c == '\t')
1012             c = readc(1);
1013         if (c == '#')
1014             do
1015                 c = readc(1);
1016             while (c != CHAR_ERR && c != '\n');
1017         if (c == CHAR_ERR)
1018             goto past;
1019         if (c == '\n') {
1020             if (wp)
1021                 break;
1022             return (0);
1023         }
1024         unreadc(c);
1025         found = 1;
1026         first = 1;
1027         do {
1028             c = readc(1);
1029             if (c == '\\' && (c = readc(1)) == '\n')
1030                 c = ' ';
1031             if (c == '\'' || c == '"') {
1032                 if (d == 0)
1033                     d = c;
1034                 else if (d == c)
1035                     d = 0;
1036             }
1037             if (c == CHAR_ERR)
1038                 goto past;
1039             if (wp)
1040                 Strbuf_append1(wp, (Char) c);
1041             if (!first && !d && c == '(') {
1042                 if (wp)
1043                     goto past_word_end;
1044                 else
1045                     break;
1046             }
1047             first = 0;
1048         } while ((d || (c != ' ' && c != '\t')) && c != '\n');
1049     } while (wp == 0);
1050
1051  past_word_end:
1052     unreadc(c);
1053     if (found) {
1054         wp->len--;
1055         Strbuf_terminate(wp);
1056     }
1057
1058     return (found);
1059
1060 past:
1061     switch (Stype) {
1062
1063     case TC_IF:
1064         stderror(ERR_NAME | ERR_NOTFOUND, "then/endif");
1065         break;
1066
1067     case TC_ELSE:
1068         stderror(ERR_NAME | ERR_NOTFOUND, "endif");
1069         break;
1070
1071     case TC_BRKSW:
1072     case TC_SWITCH:
1073         stderror(ERR_NAME | ERR_NOTFOUND, "endsw");
1074         break;
1075
1076     case TC_BREAK:
1077         stderror(ERR_NAME | ERR_NOTFOUND, "end");
1078         break;
1079
1080     case TC_GOTO:
1081         setname(short2str(Sgoal));
1082         stderror(ERR_NAME | ERR_NOTFOUND, "label");
1083         break;
1084
1085     default:
1086         break;
1087     }
1088     /* NOTREACHED */
1089     return (0);
1090 }
1091
1092 static void
1093 toend(void)
1094 {
1095     if (whyles->w_end.type == TCSH_F_SEEK && whyles->w_end.f_seek == 0) {
1096         search(TC_BREAK, 0, NULL);
1097         btell(&whyles->w_end);
1098         whyles->w_end.f_seek--;
1099     }
1100     else {
1101         bseek(&whyles->w_end);
1102     }
1103     wfree();
1104 }
1105
1106 static void
1107 wpfree(struct whyle *wp)
1108 {
1109         if (wp->w_fe0)
1110             blkfree(wp->w_fe0);
1111         xfree(wp->w_fename);
1112         xfree(wp);
1113 }
1114
1115 void
1116 wfree(void)
1117 {
1118     struct Ain    o;
1119     struct whyle *nwp;
1120 #ifdef lint
1121     nwp = NULL; /* sun lint is dumb! */
1122 #endif
1123
1124 #ifdef FDEBUG
1125     static const char foo[] = "IAFE";
1126 #endif /* FDEBUG */
1127
1128     btell(&o);
1129
1130 #ifdef FDEBUG
1131     xprintf("o->type %c o->a_seek %d o->f_seek %d\n",
1132             foo[o.type + 1], o.a_seek, o.f_seek);
1133 #endif /* FDEBUG */
1134
1135     for (; whyles; whyles = nwp) {
1136         struct whyle *wp = whyles;
1137         nwp = wp->w_next;
1138
1139 #ifdef FDEBUG
1140         xprintf("start->type %c start->a_seek %d start->f_seek %d\n",
1141                 foo[wp->w_start.type+1],
1142                 wp->w_start.a_seek, wp->w_start.f_seek);
1143         xprintf("end->type %c end->a_seek %d end->f_seek %d\n",
1144                 foo[wp->w_end.type + 1], wp->w_end.a_seek, wp->w_end.f_seek);
1145 #endif /* FDEBUG */
1146
1147         /*
1148          * XXX: We free loops that have different seek types.
1149          */
1150         if (wp->w_end.type != TCSH_I_SEEK && wp->w_start.type == wp->w_end.type &&
1151             wp->w_start.type == o.type) {
1152             if (wp->w_end.type == TCSH_F_SEEK) {
1153                 if (o.f_seek >= wp->w_start.f_seek &&
1154                     (wp->w_end.f_seek == 0 || o.f_seek < wp->w_end.f_seek))
1155                     break;
1156             }
1157             else {
1158                 if (o.a_seek >= wp->w_start.a_seek &&
1159                     (wp->w_end.a_seek == 0 || o.a_seek < wp->w_end.a_seek))
1160                     break;
1161             }
1162         }
1163
1164         wpfree(wp);
1165     }
1166 }
1167
1168 /*ARGSUSED*/
1169 void
1170 doecho(Char **v, struct command *c)
1171 {
1172     USE(c);
1173     xecho(' ', v);
1174 }
1175
1176 /*ARGSUSED*/
1177 void
1178 doglob(Char **v, struct command *c)
1179 {
1180     USE(c);
1181     xecho(0, v);
1182     flush();
1183 }
1184
1185 static void
1186 xecho(int sep, Char **v)
1187 {
1188     Char *cp, **globbed = NULL;
1189     int     nonl = 0;
1190     int     echo_style = ECHO_STYLE;
1191     struct varent *vp;
1192
1193     if ((vp = adrof(STRecho_style)) != NULL && vp->vec != NULL &&
1194         vp->vec[0] != NULL) {
1195         if (Strcmp(vp->vec[0], STRbsd) == 0)
1196             echo_style = BSD_ECHO;
1197         else if (Strcmp(vp->vec[0], STRsysv) == 0)
1198             echo_style = SYSV_ECHO;
1199         else if (Strcmp(vp->vec[0], STRboth) == 0)
1200             echo_style = BOTH_ECHO;
1201         else if (Strcmp(vp->vec[0], STRnone) == 0)
1202             echo_style = NONE_ECHO;
1203     }
1204
1205     v++;
1206     if (*v == 0)
1207         goto done;
1208     if (setintr) {
1209         int old_pintr_disabled;
1210         pintr_push_enable(&old_pintr_disabled);
1211         v = glob_all_or_error(v);
1212         cleanup_until(&old_pintr_disabled);
1213     } else {
1214         v = glob_all_or_error(v);
1215     }
1216     globbed = v;
1217     if (globbed != NULL)
1218         cleanup_push(globbed, blk_cleanup);
1219
1220     if ((echo_style & BSD_ECHO) != 0 && sep == ' ' && *v && eq(*v, STRmn))
1221         nonl++, v++;
1222
1223     while ((cp = *v++) != 0) {
1224         Char c;
1225
1226         if (setintr) {
1227             int old_pintr_disabled;
1228
1229             pintr_push_enable(&old_pintr_disabled);
1230             cleanup_until(&old_pintr_disabled);
1231         }
1232         while ((c = *cp++) != 0) {
1233             if ((echo_style & SYSV_ECHO) != 0 && c == '\\') {
1234                 switch (c = *cp++) {
1235                 case 'a':
1236                     c = '\a';
1237                     break;
1238                 case 'b':
1239                     c = '\b';
1240                     break;
1241                 case 'c':
1242                     nonl = 1;
1243                     goto done;
1244                 case 'e':
1245 #if 0                   /* Windows does not understand \e */
1246                     c = '\e';
1247 #else
1248                     c = CTL_ESC('\033');
1249 #endif
1250                     break;
1251                 case 'f':
1252                     c = '\f';
1253                     break;
1254                 case 'n':
1255                     c = '\n';
1256                     break;
1257                 case 'r':
1258                     c = '\r';
1259                     break;
1260                 case 't':
1261                     c = '\t';
1262                     break;
1263                 case 'v':
1264                     c = '\v';
1265                     break;
1266                 case '\\':
1267                     c = '\\';
1268                     break;
1269                 case '0':
1270                     c = 0;
1271                     if (*cp >= '0' && *cp < '8')
1272                         c = c * 8 + *cp++ - '0';
1273                     if (*cp >= '0' && *cp < '8')
1274                         c = c * 8 + *cp++ - '0';
1275                     if (*cp >= '0' && *cp < '8')
1276                         c = c * 8 + *cp++ - '0';
1277                     break;
1278                 case '\0':
1279                     c = '\\';
1280                     cp--;
1281                     break;
1282                 default:
1283                     xputchar('\\' | QUOTE);
1284                     break;
1285                 }
1286             }
1287             xputwchar(c | QUOTE);
1288
1289         }
1290         if (*v)
1291             xputchar(sep | QUOTE);
1292     }
1293 done:
1294     if (sep && nonl == 0)
1295         xputchar('\n');
1296     else
1297         flush();
1298     if (globbed != NULL)
1299         cleanup_until(globbed);
1300 }
1301
1302 /* check whether an environment variable should invoke 'set_locale()' */
1303 static int
1304 islocale_var(Char *var)
1305 {
1306     static Char *locale_vars[] = {
1307         STRLANG,        STRLC_ALL,      STRLC_CTYPE,    STRLC_NUMERIC,
1308         STRLC_TIME,     STRLC_COLLATE,  STRLC_MESSAGES, STRLC_MONETARY, 0
1309     };
1310     Char **v;
1311
1312     for (v = locale_vars; *v; ++v)
1313         if (eq(var, *v))
1314             return 1;
1315     return 0;
1316 }
1317
1318 static void
1319 xlate_cr_cleanup(void *dummy)
1320 {
1321     USE(dummy);
1322     xlate_cr = 0;
1323 }
1324
1325 /*ARGSUSED*/
1326 void
1327 doprintenv(Char **v, struct command *c)
1328 {
1329     Char   *e;
1330
1331     USE(c);
1332     v++;
1333     if (*v == 0) {
1334         Char **ep;
1335
1336         xlate_cr = 1;
1337         cleanup_push(&xlate_cr, xlate_cr_cleanup);
1338         for (ep = STR_environ; *ep; ep++) {
1339             if (setintr) {
1340                 int old_pintr_disabled;
1341
1342                 pintr_push_enable(&old_pintr_disabled);
1343                 cleanup_until(&old_pintr_disabled);
1344             }
1345             xprintf("%S\n", *ep);
1346         }
1347         cleanup_until(&xlate_cr);
1348     }
1349     else if ((e = tgetenv(*v)) != NULL) {
1350         int old_output_raw;
1351
1352         old_output_raw = output_raw;
1353         output_raw = 1;
1354         cleanup_push(&old_output_raw, output_raw_restore);
1355         xprintf("%S\n", e);
1356         cleanup_until(&old_output_raw);
1357     }
1358     else
1359         setcopy(STRstatus, STR1, VAR_READWRITE);
1360 }
1361
1362 /* from "Karl Berry." <karl%mote.umb.edu@relay.cs.net> -- for NeXT things
1363    (and anything else with a modern compiler) */
1364
1365 /*ARGSUSED*/
1366 void
1367 dosetenv(Char **v, struct command *c)
1368 {
1369     Char   *vp, *lp;
1370
1371     USE(c);
1372     if (*++v == 0) {
1373         doprintenv(--v, 0);
1374         return;
1375     }
1376
1377     vp = *v++;
1378     lp = vp;
1379
1380     if (!letter(*lp))
1381         stderror(ERR_NAME | ERR_VARBEGIN);
1382     do {
1383         lp++;
1384     } while (alnum(*lp));
1385     if (*lp != '\0')
1386         stderror(ERR_NAME | ERR_VARALNUM);
1387
1388     if ((lp = *v++) == 0)
1389         lp = STRNULL;
1390
1391     lp = globone(lp, G_APPEND);
1392     cleanup_push(lp, xfree);
1393     tsetenv(vp, lp);
1394     if (eq(vp, STRKPATH)) {
1395         importpath(lp);
1396         dohash(NULL, NULL);
1397         cleanup_until(lp);
1398         return;
1399     }
1400
1401 #ifdef apollo
1402     if (eq(vp, STRSYSTYPE)) {
1403         dohash(NULL, NULL);
1404         cleanup_until(lp);
1405         return;
1406     }
1407 #endif /* apollo */
1408
1409     /* dspkanji/dspmbyte autosetting */
1410     /* PATCH IDEA FROM Issei.Suzuki VERY THANKS */
1411 #if defined(DSPMBYTE)
1412     if(eq(vp, STRLANG) && !adrof(CHECK_MBYTEVAR)) {
1413         autoset_dspmbyte(lp);
1414     }
1415 #endif
1416
1417     if (islocale_var(vp)) {
1418 #ifdef NLS
1419         int     k;
1420
1421 # ifdef SETLOCALEBUG
1422         dont_free = 1;
1423 # endif /* SETLOCALEBUG */
1424         (void) setlocale(LC_ALL, "");
1425 # ifdef LC_COLLATE
1426         (void) setlocale(LC_COLLATE, "");
1427 # endif
1428 # ifdef LC_CTYPE
1429         (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
1430 # endif /* LC_CTYPE */
1431 # if defined(AUTOSET_KANJI)
1432         autoset_kanji();
1433 # endif /* AUTOSET_KANJI */
1434 # ifdef NLS_CATALOGS
1435 #  ifdef LC_MESSAGES
1436         (void) setlocale(LC_MESSAGES, "");
1437 #  endif /* LC_MESSAGES */
1438         nlsclose();
1439         nlsinit();
1440 # endif /* NLS_CATALOGS */
1441 # ifdef SETLOCALEBUG
1442         dont_free = 0;
1443 # endif /* SETLOCALEBUG */
1444 # ifdef STRCOLLBUG
1445         fix_strcoll_bug();
1446 # endif /* STRCOLLBUG */
1447         tw_cmd_free();  /* since the collation sequence has changed */
1448         for (k = 0200; k <= 0377 && !Isprint(CTL_ESC(k)); k++)
1449             continue;
1450         AsciiOnly = MB_CUR_MAX == 1 && k > 0377;
1451 #else /* !NLS */
1452         AsciiOnly = 0;
1453 #endif /* NLS */
1454         NLSMapsAreInited = 0;
1455         ed_Init();
1456         if (MapsAreInited && !NLSMapsAreInited)
1457             ed_InitNLSMaps();
1458         cleanup_until(lp);
1459         return;
1460     }
1461
1462 #ifdef NLS_CATALOGS
1463     if (eq(vp, STRNLSPATH)) {
1464         nlsclose();
1465         nlsinit();
1466     }
1467 #endif
1468
1469     if (eq(vp, STRNOREBIND)) {
1470         NoNLSRebind = 1;
1471         MapsAreInited = 0;
1472         NLSMapsAreInited = 0;
1473         ed_InitMaps();
1474         cleanup_until(lp);
1475         return;
1476     }
1477 #ifdef WINNT_NATIVE
1478     if (eq(vp, STRtcshlang)) {
1479         nlsinit();
1480         cleanup_until(lp);
1481         return;
1482     }
1483 #endif /* WINNT_NATIVE */
1484     if (eq(vp, STRKTERM)) {
1485         char *t;
1486
1487         setv(STRterm, quote(lp), VAR_READWRITE);        /* lp memory used here */
1488         cleanup_ignore(lp);
1489         cleanup_until(lp);
1490         t = short2str(lp);
1491         if (noediting && strcmp(t, "unknown") != 0 && strcmp(t,"dumb") != 0) {
1492             editing = 1;
1493             noediting = 0;
1494             setNS(STRedit);
1495         }
1496         GotTermCaps = 0;
1497         ed_Init();
1498         return;
1499     }
1500
1501     if (eq(vp, STRKHOME)) {
1502         Char *canon;
1503         /*
1504          * convert to canonical pathname (possibly resolving symlinks)
1505          */
1506         canon = dcanon(lp, lp);
1507         cleanup_ignore(lp);
1508         cleanup_until(lp);
1509         cleanup_push(canon, xfree);
1510         setv(STRhome, quote(canon), VAR_READWRITE); /* lp memory used here */
1511         cleanup_ignore(canon);
1512         cleanup_until(canon);
1513
1514         /* fix directory stack for new tilde home */
1515         dtilde();
1516         return;
1517     }
1518
1519     if (eq(vp, STRKSHLVL)) {
1520         setv(STRshlvl, quote(lp), VAR_READWRITE); /* lp memory used here */
1521         cleanup_ignore(lp);
1522         cleanup_until(lp);
1523         return;
1524     }
1525
1526     if (eq(vp, STRKUSER)) {
1527         setv(STRuser, quote(lp), VAR_READWRITE);        /* lp memory used here */
1528         cleanup_ignore(lp);
1529         cleanup_until(lp);
1530         return;
1531     }
1532
1533     if (eq(vp, STRKGROUP)) {
1534         setv(STRgroup, quote(lp), VAR_READWRITE); /* lp memory used here */
1535         cleanup_ignore(lp);
1536         cleanup_until(lp);
1537         return;
1538     }
1539
1540 #ifdef COLOR_LS_F
1541     if (eq(vp, STRLS_COLORS)) {
1542         parseLS_COLORS(lp);
1543         cleanup_until(lp);
1544         return;
1545     }
1546 #endif /* COLOR_LS_F */
1547
1548 #ifdef SIG_WINDOW
1549     /*
1550      * Load/Update $LINES $COLUMNS
1551      */
1552     if ((eq(lp, STRNULL) && (eq(vp, STRLINES) || eq(vp, STRCOLUMNS))) ||
1553         eq(vp, STRTERMCAP)) {
1554         cleanup_until(lp);
1555         check_window_size(1);
1556         return;
1557     }
1558
1559     /*
1560      * Change the size to the one directed by $LINES and $COLUMNS
1561      */
1562     if (eq(vp, STRLINES) || eq(vp, STRCOLUMNS)) {
1563 #if 0
1564         GotTermCaps = 0;
1565 #endif
1566         cleanup_until(lp);
1567         ed_Init();
1568         return;
1569     }
1570 #endif /* SIG_WINDOW */
1571     cleanup_until(lp);
1572 }
1573
1574 /*ARGSUSED*/
1575 void
1576 dounsetenv(Char **v, struct command *c)
1577 {
1578     Char  **ep, *p, *n, *name;
1579     int     i, maxi;
1580
1581     USE(c);
1582     /*
1583      * Find the longest environment variable
1584      */
1585     for (maxi = 0, ep = STR_environ; *ep; ep++) {
1586         for (i = 0, p = *ep; *p && *p != '='; p++, i++)
1587             continue;
1588         if (i > maxi)
1589             maxi = i;
1590     }
1591
1592     name = xmalloc((maxi + 1) * sizeof(Char));
1593     cleanup_push(name, xfree);
1594
1595     while (++v && *v)
1596         for (maxi = 1; maxi;)
1597             for (maxi = 0, ep = STR_environ; *ep; ep++) {
1598                 for (n = name, p = *ep; *p && *p != '='; *n++ = *p++)
1599                     continue;
1600                 *n = '\0';
1601                 if (!Gmatch(name, *v))
1602                     continue;
1603                 maxi = 1;
1604
1605                 /* Unset the name. This wasn't being done until
1606                  * later but most of the stuff following won't
1607                  * work (particularly the setlocale() and getenv()
1608                  * stuff) as intended until the name is actually
1609                  * removed. (sg)
1610                  */
1611                 Unsetenv(name);
1612
1613                 if (eq(name, STRNOREBIND)) {
1614                     NoNLSRebind = 0;
1615                     MapsAreInited = 0;
1616                     NLSMapsAreInited = 0;
1617                     ed_InitMaps();
1618                 }
1619 #ifdef apollo
1620                 else if (eq(name, STRSYSTYPE))
1621                     dohash(NULL, NULL);
1622 #endif /* apollo */
1623                 else if (islocale_var(name)) {
1624 #ifdef NLS
1625                     int     k;
1626
1627 # ifdef SETLOCALEBUG
1628                     dont_free = 1;
1629 # endif /* SETLOCALEBUG */
1630                     (void) setlocale(LC_ALL, "");
1631 # ifdef LC_COLLATE
1632                     (void) setlocale(LC_COLLATE, "");
1633 # endif
1634 # ifdef LC_CTYPE
1635                     (void) setlocale(LC_CTYPE, ""); /* for iscntrl */
1636 # endif /* LC_CTYPE */
1637 # ifdef NLS_CATALOGS
1638 #  ifdef LC_MESSAGES
1639                     (void) setlocale(LC_MESSAGES, "");
1640 #  endif /* LC_MESSAGES */
1641                     nlsclose();
1642                     nlsinit();
1643 # endif /* NLS_CATALOGS */
1644 # ifdef SETLOCALEBUG
1645                     dont_free = 0;
1646 # endif /* SETLOCALEBUG */
1647 # ifdef STRCOLLBUG
1648                     fix_strcoll_bug();
1649 # endif /* STRCOLLBUG */
1650                     tw_cmd_free();/* since the collation sequence has changed */
1651                     for (k = 0200; k <= 0377 && !Isprint(CTL_ESC(k)); k++)
1652                         continue;
1653                     AsciiOnly = MB_CUR_MAX == 1 && k > 0377;
1654 #else /* !NLS */
1655                     AsciiOnly = getenv("LANG") == NULL &&
1656                         getenv("LC_CTYPE") == NULL;
1657 #endif /* NLS */
1658                     NLSMapsAreInited = 0;
1659                     ed_Init();
1660                     if (MapsAreInited && !NLSMapsAreInited)
1661                         ed_InitNLSMaps();
1662
1663                 }
1664 #ifdef WINNT_NATIVE
1665                 else if (eq(name,(STRtcshlang))) {
1666                     nls_dll_unload();
1667                     nlsinit();
1668                 }
1669 #endif /* WINNT_NATIVE */
1670 #ifdef COLOR_LS_F
1671                 else if (eq(name, STRLS_COLORS))
1672                     parseLS_COLORS(n);
1673 #endif /* COLOR_LS_F */
1674 #ifdef NLS_CATALOGS
1675                 else if (eq(name, STRNLSPATH)) {
1676                     nlsclose();
1677                     nlsinit();
1678                 }
1679 #endif
1680                 /*
1681                  * start again cause the environment changes
1682                  */
1683                 break;
1684             }
1685     cleanup_until(name);
1686 }
1687
1688 void
1689 tsetenv(const Char *name, const Char *val)
1690 {
1691 #ifdef SETENV_IN_LIB
1692 /*
1693  * XXX: This does not work right, since tcsh cannot track changes to
1694  * the environment this way. (the builtin setenv without arguments does
1695  * not print the right stuff neither does unsetenv). This was for Mach,
1696  * it is not needed anymore.
1697  */
1698 #undef setenv
1699     char   *cname;
1700
1701     if (name == NULL)
1702         return;
1703     cname = strsave(short2str(name));
1704     setenv(cname, short2str(val), 1);
1705     xfree(cname);
1706 #else /* !SETENV_IN_LIB */
1707     Char **ep = STR_environ;
1708     const Char *ccp;
1709     Char *cp, *dp;
1710     Char   *blk[2];
1711     Char  **oep = ep;
1712
1713 #ifdef WINNT_NATIVE
1714     nt_set_env(name,val);
1715 #endif /* WINNT_NATIVE */
1716     for (; *ep; ep++) {
1717 #ifdef WINNT_NATIVE
1718         for (ccp = name, dp = *ep; *ccp && Tolower(*ccp & TRIM) == Tolower(*dp);
1719                                 ccp++, dp++)
1720 #else
1721         for (ccp = name, dp = *ep; *ccp && (*ccp & TRIM) == *dp; ccp++, dp++)
1722 #endif /* WINNT_NATIVE */
1723             continue;
1724         if (*ccp != 0 || *dp != '=')
1725             continue;
1726         cp = Strspl(STRequal, val);
1727         xfree(*ep);
1728         *ep = strip(Strspl(name, cp));
1729         xfree(cp);
1730         blkfree((Char **) environ);
1731         environ = short2blk(STR_environ);
1732         return;
1733     }
1734     cp = Strspl(name, STRequal);
1735     blk[0] = strip(Strspl(cp, val));
1736     xfree(cp);
1737     blk[1] = 0;
1738     STR_environ = blkspl(STR_environ, blk);
1739     blkfree((Char **) environ);
1740     environ = short2blk(STR_environ);
1741     xfree(oep);
1742 #endif /* SETENV_IN_LIB */
1743 }
1744
1745 void
1746 Unsetenv(Char *name)
1747 {
1748     Char **ep = STR_environ;
1749     Char *cp, *dp;
1750     Char **oep = ep;
1751
1752 #ifdef WINNT_NATIVE
1753         nt_set_env(name,NULL);
1754 #endif /*WINNT_NATIVE */
1755     for (; *ep; ep++) {
1756         for (cp = name, dp = *ep; *cp && *cp == *dp; cp++, dp++)
1757             continue;
1758         if (*cp != 0 || *dp != '=')
1759             continue;
1760         cp = *ep;
1761         *ep = 0;
1762         STR_environ = blkspl(STR_environ, ep + 1);
1763         blkfree((Char **) environ);
1764         environ = short2blk(STR_environ);
1765         *ep = cp;
1766         xfree(cp);
1767         xfree(oep);
1768         return;
1769     }
1770 }
1771
1772 /*ARGSUSED*/
1773 void
1774 doumask(Char **v, struct command *c)
1775 {
1776     Char *cp = v[1];
1777     int i;
1778
1779     USE(c);
1780     if (cp == 0) {
1781         i = (int)umask(0);
1782         (void) umask(i);
1783         xprintf("%o\n", i);
1784         return;
1785     }
1786     i = 0;
1787     while (Isdigit(*cp) && *cp != '8' && *cp != '9')
1788         i = i * 8 + *cp++ - '0';
1789     if (*cp || i < 0 || i > 0777)
1790         stderror(ERR_NAME | ERR_MASK);
1791     (void) umask(i);
1792 }
1793
1794 #ifndef HAVENOLIMIT
1795 # ifndef BSDLIMIT
1796    typedef long RLIM_TYPE;
1797 #  ifdef _OSD_POSIX /* BS2000 */
1798 #   include <ulimit.h>
1799 #  endif
1800 #  ifndef RLIM_INFINITY
1801 #   if !defined(_MINIX) && !defined(__clipper__) && !defined(_CRAY)
1802     extern RLIM_TYPE ulimit();
1803 #   endif /* ! _MINIX && !__clipper__ */
1804 #   define RLIM_INFINITY 0x003fffff
1805 #   define RLIMIT_FSIZE 1
1806 #  endif /* RLIM_INFINITY */
1807 #  ifdef aiws
1808 #   define toset(a) (((a) == 3) ? 1004 : (a) + 1)
1809 #   define RLIMIT_DATA  3
1810 #   define RLIMIT_STACK 1005
1811 #  else /* aiws */
1812 #   define toset(a) ((a) + 1)
1813 #  endif /* aiws */
1814 # else /* BSDLIMIT */
1815 #  if (defined(BSD4_4) || defined(__linux__) || defined(__GNU__) || defined(__GLIBC__) || (HPUXVERSION >= 1100)) && !defined(__386BSD__)
1816     typedef rlim_t RLIM_TYPE;
1817 #  else
1818 #   if defined(SOLARIS2) || (defined(sgi) && SYSVREL > 3)
1819      typedef rlim_t RLIM_TYPE;
1820 #   else
1821 #    if defined(_SX)
1822       typedef long long RLIM_TYPE;
1823 #    else /* !_SX */
1824       typedef unsigned long RLIM_TYPE;
1825 #    endif /* _SX */
1826 #   endif /* SOLARIS2 || (sgi && SYSVREL > 3) */
1827 #  endif /* BSD4_4 && !__386BSD__  */
1828 # endif /* BSDLIMIT */
1829
1830 # if (HPUXVERSION > 700) && (HPUXVERSION < 1100) && defined(BSDLIMIT)
1831 /* Yes hpux8.0 has limits but <sys/resource.h> does not make them public */
1832 /* Yes, we could have defined _KERNEL, and -I/etc/conf/h, but is that better? */
1833 #  ifndef RLIMIT_CPU
1834 #   define RLIMIT_CPU           0
1835 #   define RLIMIT_FSIZE         1
1836 #   define RLIMIT_DATA          2
1837 #   define RLIMIT_STACK         3
1838 #   define RLIMIT_CORE          4
1839 #   define RLIMIT_RSS           5
1840 #   define RLIMIT_NOFILE        6
1841 #  endif /* RLIMIT_CPU */
1842 #  ifndef RLIM_INFINITY
1843 #   define RLIM_INFINITY        0x7fffffff
1844 #  endif /* RLIM_INFINITY */
1845    /*
1846     * old versions of HP/UX counted limits in 512 bytes
1847     */
1848 #  ifndef SIGRTMIN
1849 #   define FILESIZE512
1850 #  endif /* SIGRTMIN */
1851 # endif /* (HPUXVERSION > 700) && (HPUXVERSION < 1100) && BSDLIMIT */
1852
1853 # if SYSVREL > 3 && defined(BSDLIMIT) && !defined(_SX)
1854 /* In order to use rusage, we included "/usr/ucbinclude/sys/resource.h" in */
1855 /* sh.h.  However, some SVR4 limits are defined in <sys/resource.h>.  Rather */
1856 /* than include both and get warnings, we define the extra SVR4 limits here. */
1857 /* XXX: I don't understand if RLIMIT_AS is defined, why don't we define */
1858 /* RLIMIT_VMEM based on it? */
1859 #  ifndef RLIMIT_VMEM
1860 #   define RLIMIT_VMEM  6
1861 #  endif
1862 #  ifndef RLIMIT_AS
1863 #   define RLIMIT_AS    RLIMIT_VMEM
1864 #  endif
1865 # endif /* SYSVREL > 3 && BSDLIMIT */
1866
1867 # if (defined(__linux__) || defined(__GNU__) || defined(__GLIBC__))
1868 #  if defined(RLIMIT_AS) && !defined(RLIMIT_VMEM)
1869 #   define RLIMIT_VMEM  RLIMIT_AS
1870 #  endif
1871 /*
1872  * Oh well, <asm-generic/resource.h> has it, but <bits/resource.h> does not
1873  * Linux headers: When the left hand does not know what the right hand does.
1874  */
1875 #  if defined(RLIMIT_RTPRIO) && !defined(RLIMIT_RTTIME)
1876 #   define RLIMIT_RTTIME (RLIMIT_RTPRIO + 1)
1877 #  endif
1878 # endif
1879
1880 struct limits limits[] =
1881 {
1882 # ifdef RLIMIT_CPU
1883     { RLIMIT_CPU,       "cputime",      1,      "seconds"       },
1884 # endif /* RLIMIT_CPU */
1885
1886 # ifdef RLIMIT_FSIZE
1887 #  ifndef aiws
1888     { RLIMIT_FSIZE,     "filesize",     1024,   "kbytes"        },
1889 #  else
1890     { RLIMIT_FSIZE,     "filesize",     512,    "blocks"        },
1891 #  endif /* aiws */
1892 # endif /* RLIMIT_FSIZE */
1893
1894 # ifdef RLIMIT_DATA
1895     { RLIMIT_DATA,      "datasize",     1024,   "kbytes"        },
1896 # endif /* RLIMIT_DATA */
1897
1898 # ifdef RLIMIT_STACK
1899 #  ifndef aiws
1900     { RLIMIT_STACK,     "stacksize",    1024,   "kbytes"        },
1901 #  else
1902     { RLIMIT_STACK,     "stacksize",    1024 * 1024,    "kbytes"},
1903 #  endif /* aiws */
1904 # endif /* RLIMIT_STACK */
1905
1906 # ifdef RLIMIT_CORE
1907     { RLIMIT_CORE,      "coredumpsize", 1024,   "kbytes"        },
1908 # endif /* RLIMIT_CORE */
1909
1910 # ifdef RLIMIT_RSS
1911     { RLIMIT_RSS,       "memoryuse",    1024,   "kbytes"        },
1912 # endif /* RLIMIT_RSS */
1913
1914 # ifdef RLIMIT_UMEM
1915     { RLIMIT_UMEM,      "memoryuse",    1024,   "kbytes"        },
1916 # endif /* RLIMIT_UMEM */
1917
1918 # ifdef RLIMIT_VMEM
1919     { RLIMIT_VMEM,      "vmemoryuse",   1024,   "kbytes"        },
1920 # endif /* RLIMIT_VMEM */
1921
1922 # if defined(RLIMIT_HEAP) /* found on BS2000/OSD systems */
1923     { RLIMIT_HEAP,      "heapsize",     1024,   "kbytes"        },
1924 # endif /* RLIMIT_HEAP */
1925
1926 # ifdef RLIMIT_NOFILE
1927     { RLIMIT_NOFILE,    "descriptors", 1,       ""              },
1928 # endif /* RLIMIT_NOFILE */
1929
1930 # ifdef RLIMIT_CONCUR
1931     { RLIMIT_CONCUR,    "concurrency", 1,       "thread(s)"     },
1932 # endif /* RLIMIT_CONCUR */
1933
1934 # ifdef RLIMIT_MEMLOCK
1935     { RLIMIT_MEMLOCK,   "memorylocked", 1024,   "kbytes"        },
1936 # endif /* RLIMIT_MEMLOCK */
1937
1938 # ifdef RLIMIT_NPROC
1939     { RLIMIT_NPROC,     "maxproc",      1,      ""              },
1940 # endif /* RLIMIT_NPROC */
1941
1942 # if defined(RLIMIT_OFILE) && !defined(RLIMIT_NOFILE)
1943     { RLIMIT_OFILE,     "openfiles",    1,      ""              },
1944 # endif /* RLIMIT_OFILE && !defined(RLIMIT_NOFILE) */
1945
1946 # ifdef RLIMIT_SBSIZE
1947     { RLIMIT_SBSIZE,    "sbsize",       1,      ""              },
1948 # endif /* RLIMIT_SBSIZE */
1949
1950 #ifdef RLIMIT_POSIXLOCKS
1951     { RLIMIT_POSIXLOCKS, "posixlocks",   1,      ""             },
1952 #endif /* RLIMIT_POSIXLOCKS */
1953
1954 # ifdef RLIMIT_SWAP
1955     { RLIMIT_SWAP,      "swapsize",     1024,   "kbytes"        },
1956 # endif /* RLIMIT_SWAP */
1957
1958 # ifdef RLIMIT_LOCKS
1959     { RLIMIT_LOCKS,     "maxlocks",     1,      ""              },
1960 # endif /* RLIMIT_LOCKS */
1961
1962 # ifdef RLIMIT_SIGPENDING
1963     { RLIMIT_SIGPENDING,"maxsignal",    1,      ""              },
1964 # endif /* RLIMIT_SIGPENDING */
1965
1966 # ifdef RLIMIT_MSGQUEUE
1967     { RLIMIT_MSGQUEUE,  "maxmessage",   1,      ""              },
1968 # endif /* RLIMIT_MSGQUEUE */
1969
1970 # ifdef RLIMIT_NICE
1971     { RLIMIT_NICE,      "maxnice",      1,      ""              },
1972 # endif /* RLIMIT_NICE */
1973
1974 # ifdef RLIMIT_RTPRIO
1975     { RLIMIT_RTPRIO,    "maxrtprio",    1,      ""              },
1976 # endif /* RLIMIT_RTPRIO */
1977
1978 # ifdef RLIMIT_RTTIME
1979     { RLIMIT_RTTIME,    "maxrttime",    1,      "usec"          },
1980 # endif /* RLIMIT_RTTIME */
1981
1982     { -1,               NULL,           0,      NULL            }
1983 };
1984
1985 static struct limits *findlim   (Char *);
1986 static RLIM_TYPE getval         (struct limits *, Char **);
1987 static int strtail              (Char *, const char *);
1988 static void limtail             (Char *, const char *);
1989 static void limtail2            (Char *, const char *, const char *);
1990 static void plim                (struct limits *, int);
1991 static int setlim               (struct limits *, int, RLIM_TYPE);
1992
1993 #ifdef convex
1994 static  RLIM_TYPE
1995 restrict_limit(double value)
1996 {
1997     /*
1998      * is f too large to cope with? return the maximum or minimum int
1999      */
2000     if (value > (double) INT_MAX)
2001         return (RLIM_TYPE) INT_MAX;
2002     else if (value < (double) INT_MIN)
2003         return (RLIM_TYPE) INT_MIN;
2004     else
2005         return (RLIM_TYPE) value;
2006 }
2007 #else /* !convex */
2008 # define restrict_limit(x)      ((RLIM_TYPE) (x))
2009 #endif /* convex */
2010
2011
2012 static struct limits *
2013 findlim(Char *cp)
2014 {
2015     struct limits *lp, *res;
2016
2017     res = NULL;
2018     for (lp = limits; lp->limconst >= 0; lp++)
2019         if (prefix(cp, str2short(lp->limname))) {
2020             if (res)
2021                 stderror(ERR_NAME | ERR_AMBIG);
2022             res = lp;
2023         }
2024     if (res)
2025         return (res);
2026     stderror(ERR_NAME | ERR_LIMIT);
2027     /* NOTREACHED */
2028     return (0);
2029 }
2030
2031 /*ARGSUSED*/
2032 void
2033 dolimit(Char **v, struct command *c)
2034 {
2035     struct limits *lp;
2036     RLIM_TYPE limit;
2037     int    hard = 0;
2038
2039     USE(c);
2040     v++;
2041     if (*v && eq(*v, STRmh)) {
2042         hard = 1;
2043         v++;
2044     }
2045     if (*v == 0) {
2046         for (lp = limits; lp->limconst >= 0; lp++)
2047             plim(lp, hard);
2048         return;
2049     }
2050     lp = findlim(v[0]);
2051     if (v[1] == 0) {
2052         plim(lp, hard);
2053         return;
2054     }
2055     limit = getval(lp, v + 1);
2056     if (setlim(lp, hard, limit) < 0)
2057         stderror(ERR_SILENT);
2058 }
2059
2060 static  RLIM_TYPE
2061 getval(struct limits *lp, Char **v)
2062 {
2063     float f;
2064     Char   *cp = *v++;
2065
2066     f = atof(short2str(cp));
2067
2068 # ifdef convex
2069     /*
2070      * is f too large to cope with. limit f to minint, maxint  - X-6768 by
2071      * strike
2072      */
2073     if ((f < (double) INT_MIN) || (f > (double) INT_MAX)) {
2074         stderror(ERR_NAME | ERR_TOOLARGE);
2075     }
2076 # endif /* convex */
2077
2078     while (Isdigit(*cp) || *cp == '.' || *cp == 'e' || *cp == 'E')
2079         cp++;
2080     if (*cp == 0) {
2081         if (*v == 0)
2082             return restrict_limit((f * lp->limdiv) + 0.5);
2083         cp = *v;
2084     }
2085     switch (*cp) {
2086 # ifdef RLIMIT_CPU
2087     case ':':
2088         if (lp->limconst != RLIMIT_CPU)
2089             goto badscal;
2090         return f == 0.0 ? (RLIM_TYPE) 0 : restrict_limit((f * 60.0 + atof(short2str(cp + 1))));
2091     case 'h':
2092         if (lp->limconst != RLIMIT_CPU)
2093             goto badscal;
2094         limtail(cp, "hours");
2095         f *= 3600.0;
2096         break;
2097 # endif /* RLIMIT_CPU */
2098     case 'm':
2099 # ifdef RLIMIT_CPU
2100         if (lp->limconst == RLIMIT_CPU) {
2101             limtail(cp, "minutes");
2102             f *= 60.0;
2103             break;
2104         }
2105 # endif /* RLIMIT_CPU */
2106         limtail2(cp, "megabytes", "mbytes");
2107         f *= 1024.0 * 1024.0;
2108         break;
2109 # ifdef RLIMIT_CPU
2110     case 's':
2111         if (lp->limconst != RLIMIT_CPU)
2112             goto badscal;
2113         limtail(cp, "seconds");
2114         break;
2115 # endif /* RLIMIT_CPU */
2116     case 'G':
2117         *cp = 'g';
2118         /*FALLTHROUGH*/
2119     case 'g':
2120 # ifdef RLIMIT_CPU
2121         if (lp->limconst == RLIMIT_CPU)
2122             goto badscal;
2123 # endif /* RLIMIT_CPU */
2124         limtail2(cp, "gigabytes", "gbytes");
2125         f *= 1024.0 * 1024.0 * 1024.0;
2126         break;
2127     case 'M':
2128 # ifdef RLIMIT_CPU
2129         if (lp->limconst == RLIMIT_CPU)
2130             goto badscal;
2131 # endif /* RLIMIT_CPU */
2132         *cp = 'm';
2133         limtail2(cp, "megabytes", "mbytes");
2134         f *= 1024.0 * 1024.0;
2135         break;
2136     case 'k':
2137 # ifdef RLIMIT_CPU
2138         if (lp->limconst == RLIMIT_CPU)
2139             goto badscal;
2140 # endif /* RLIMIT_CPU */
2141         limtail2(cp, "kilobytes", "kbytes");
2142         f *= 1024.0;
2143         break;
2144     case 'b':
2145 # ifdef RLIMIT_CPU
2146         if (lp->limconst == RLIMIT_CPU)
2147             goto badscal;
2148 # endif /* RLIMIT_CPU */
2149         limtail(cp, "blocks");
2150         f *= 512.0;
2151         break;
2152     case 'u':
2153         limtail(cp, "unlimited");
2154         return ((RLIM_TYPE) RLIM_INFINITY);
2155     default:
2156 # ifdef RLIMIT_CPU
2157 badscal:
2158 # endif /* RLIMIT_CPU */
2159         stderror(ERR_NAME | ERR_SCALEF);
2160     }
2161 # ifdef convex
2162     return f == 0.0 ? (RLIM_TYPE) 0 : restrict_limit((f + 0.5));
2163 # else
2164     f += 0.5;
2165     if (f > (float) ((RLIM_TYPE) RLIM_INFINITY))
2166         return ((RLIM_TYPE) RLIM_INFINITY);
2167     else
2168         return ((RLIM_TYPE) f);
2169 # endif /* convex */
2170 }
2171
2172 static int
2173 strtail(Char *cp, const char *str)
2174 {
2175     while (*cp && *cp == (Char)*str)
2176         cp++, str++;
2177     return (*cp != '\0');
2178 }
2179
2180 static void
2181 limtail(Char *cp, const char *str)
2182 {
2183     if (strtail(cp, str))
2184         stderror(ERR_BADSCALE, str);
2185 }
2186
2187 static void
2188 limtail2(Char *cp, const char *str1, const char *str2)
2189 {
2190     if (strtail(cp, str1) && strtail(cp, str2))
2191         stderror(ERR_BADSCALE, str1);
2192 }
2193
2194 /*ARGSUSED*/
2195 static void
2196 plim(struct limits *lp, int hard)
2197 {
2198 # ifdef BSDLIMIT
2199     struct rlimit rlim;
2200 # endif /* BSDLIMIT */
2201     RLIM_TYPE limit;
2202     int     xdiv = lp->limdiv;
2203
2204     xprintf("%-13.13s", lp->limname);
2205
2206 # ifndef BSDLIMIT
2207     limit = ulimit(lp->limconst, 0);
2208 #  ifdef aiws
2209     if (lp->limconst == RLIMIT_DATA)
2210         limit -= 0x20000000;
2211 #  endif /* aiws */
2212 # else /* BSDLIMIT */
2213     (void) getrlimit(lp->limconst, &rlim);
2214     limit = hard ? rlim.rlim_max : rlim.rlim_cur;
2215 # endif /* BSDLIMIT */
2216
2217 # if !defined(BSDLIMIT) || defined(FILESIZE512)
2218     /*
2219      * Christos: filesize comes in 512 blocks. we divide by 2 to get 1024
2220      * blocks. Note we cannot pre-multiply cause we might overflow (A/UX)
2221      */
2222     if (lp->limconst == RLIMIT_FSIZE) {
2223         if (limit >= (RLIM_INFINITY / 512))
2224             limit = RLIM_INFINITY;
2225         else
2226             xdiv = (xdiv == 1024 ? 2 : 1);
2227     }
2228 # endif /* !BSDLIMIT || FILESIZE512 */
2229
2230     if (limit == RLIM_INFINITY)
2231         xprintf("unlimited");
2232     else
2233 # if defined(RLIMIT_CPU) && defined(_OSD_POSIX)
2234     if (lp->limconst == RLIMIT_CPU &&
2235         (unsigned long)limit >= 0x7ffffffdUL)
2236         xprintf("unlimited");
2237     else
2238 # endif
2239 # ifdef RLIMIT_CPU
2240     if (lp->limconst == RLIMIT_CPU)
2241         psecs(limit);
2242     else
2243 # endif /* RLIMIT_CPU */
2244         xprintf("%ld %s", (long) (limit / xdiv), lp->limscale);
2245     xputchar('\n');
2246 }
2247
2248 /*ARGSUSED*/
2249 void
2250 dounlimit(Char **v, struct command *c)
2251 {
2252     struct limits *lp;
2253     int    lerr = 0;
2254     int    hard = 0;
2255     int    force = 0;
2256
2257     USE(c);
2258     while (*++v && **v == '-') {
2259         Char   *vp = *v;
2260         while (*++vp)
2261             switch (*vp) {
2262             case 'f':
2263                 force = 1;
2264                 break;
2265             case 'h':
2266                 hard = 1;
2267                 break;
2268             default:
2269                 stderror(ERR_ULIMUS);
2270                 break;
2271             }
2272     }
2273
2274     if (*v == 0) {
2275         for (lp = limits; lp->limconst >= 0; lp++)
2276             if (setlim(lp, hard, (RLIM_TYPE) RLIM_INFINITY) < 0)
2277                 lerr++;
2278         if (!force && lerr)
2279             stderror(ERR_SILENT);
2280         return;
2281     }
2282     while (*v) {
2283         lp = findlim(*v++);
2284         if (setlim(lp, hard, (RLIM_TYPE) RLIM_INFINITY) < 0 && !force)
2285             stderror(ERR_SILENT);
2286     }
2287 }
2288
2289 static int
2290 setlim(struct limits *lp, int hard, RLIM_TYPE limit)
2291 {
2292 # ifdef BSDLIMIT
2293     struct rlimit rlim;
2294
2295     (void) getrlimit(lp->limconst, &rlim);
2296
2297 #  ifdef FILESIZE512
2298     /* Even though hpux has setrlimit(), it expects fsize in 512 byte blocks */
2299     if (limit != RLIM_INFINITY && lp->limconst == RLIMIT_FSIZE)
2300         limit /= 512;
2301 #  endif /* FILESIZE512 */
2302     if (hard)
2303         rlim.rlim_max = limit;
2304     else if (limit == RLIM_INFINITY && euid != 0)
2305         rlim.rlim_cur = rlim.rlim_max;
2306     else
2307         rlim.rlim_cur = limit;
2308
2309     if (rlim.rlim_cur > rlim.rlim_max)
2310         rlim.rlim_max = rlim.rlim_cur;
2311
2312     if (setrlimit(lp->limconst, &rlim) < 0) {
2313 # else /* BSDLIMIT */
2314     if (limit != RLIM_INFINITY && lp->limconst == RLIMIT_FSIZE)
2315         limit /= 512;
2316 # ifdef aiws
2317     if (lp->limconst == RLIMIT_DATA)
2318         limit += 0x20000000;
2319 # endif /* aiws */
2320     if (ulimit(toset(lp->limconst), limit) < 0) {
2321 # endif /* BSDLIMIT */
2322         int err;
2323         char *op, *type;
2324
2325         err = errno;
2326         op = strsave(limit == RLIM_INFINITY ? CGETS(15, 2, "remove") :
2327                         CGETS(15, 3, "set"));
2328         cleanup_push(op, xfree);
2329         type = strsave(hard ? CGETS(15, 4, " hard") : "");
2330         cleanup_push(type, xfree);
2331         xprintf(CGETS(15, 1, "%s: %s: Can't %s%s limit (%s)\n"), bname,
2332             lp->limname, op, type, strerror(err));
2333         cleanup_until(op);
2334         return (-1);
2335     }
2336     return (0);
2337 }
2338
2339 #endif /* !HAVENOLIMIT */
2340
2341 /*ARGSUSED*/
2342 void
2343 dosuspend(Char **v, struct command *c)
2344 {
2345 #ifdef BSDJOBS
2346     struct sigaction old;
2347 #endif /* BSDJOBS */
2348
2349     USE(c);
2350     USE(v);
2351
2352     if (loginsh)
2353         stderror(ERR_SUSPLOG);
2354     untty();
2355
2356 #ifdef BSDJOBS
2357     sigaction(SIGTSTP, NULL, &old);
2358     signal(SIGTSTP, SIG_DFL);
2359     (void) kill(0, SIGTSTP);
2360     /* the shell stops here */
2361     sigaction(SIGTSTP, &old, NULL);
2362 #else /* !BSDJOBS */
2363     stderror(ERR_JOBCONTROL);
2364 #endif /* BSDJOBS */
2365
2366 #ifdef BSDJOBS
2367     if (tpgrp != -1) {
2368         if (grabpgrp(FSHTTY, opgrp) == -1)
2369             stderror(ERR_SYSTEM, "tcgetpgrp", strerror(errno));
2370         (void) setpgid(0, shpgrp);
2371         (void) tcsetpgrp(FSHTTY, shpgrp);
2372     }
2373 #endif /* BSDJOBS */
2374     (void) setdisc(FSHTTY);
2375 }
2376
2377 /* This is the dreaded EVAL built-in.
2378  *   If you don't fiddle with file descriptors, and reset didfds,
2379  *   this command will either ignore redirection inside or outside
2380  *   its arguments, e.g. eval "date >x"  vs.  eval "date" >x
2381  *   The stuff here seems to work, but I did it by trial and error rather
2382  *   than really knowing what was going on.  If tpgrp is zero, we are
2383  *   probably a background eval, e.g. "eval date &", and we want to
2384  *   make sure that any processes we start stay in our pgrp.
2385  *   This is also the case for "time eval date" -- stay in same pgrp.
2386  *   Otherwise, under stty tostop, processes will stop in the wrong
2387  *   pgrp, with no way for the shell to get them going again.  -IAN!
2388  */
2389
2390 struct doeval_state
2391 {
2392     Char **evalvec, *evalp;
2393     int didfds;
2394 #ifndef CLOSE_ON_EXEC
2395     int didcch;
2396 #endif
2397     int saveIN, saveOUT, saveDIAG;
2398     int SHIN, SHOUT, SHDIAG;
2399 };
2400
2401 static void
2402 doeval_cleanup(void *xstate)
2403 {
2404     struct doeval_state *state;
2405
2406     state = xstate;
2407     evalvec = state->evalvec;
2408     evalp = state->evalp;
2409     doneinp = 0;
2410 #ifndef CLOSE_ON_EXEC
2411     didcch = state->didcch;
2412 #endif /* CLOSE_ON_EXEC */
2413     didfds = state->didfds;
2414     xclose(SHIN);
2415     xclose(SHOUT);
2416     xclose(SHDIAG);
2417     close_on_exec(SHIN = dmove(state->saveIN, state->SHIN), 1);
2418     close_on_exec(SHOUT = dmove(state->saveOUT, state->SHOUT), 1);
2419     close_on_exec(SHDIAG = dmove(state->saveDIAG, state->SHDIAG), 1);
2420 }
2421
2422 static Char **Ggv;
2423 /*ARGSUSED*/
2424 void
2425 doeval(Char **v, struct command *c)
2426 {
2427     struct doeval_state state;
2428     int gflag, my_reenter;
2429     Char **gv;
2430     jmp_buf_t osetexit;
2431
2432     USE(c);
2433     v++;
2434     if (*v == 0)
2435         return;
2436     gflag = tglob(v);
2437     if (gflag) {
2438         gv = v = globall(v, gflag);
2439         if (v == 0)
2440             stderror(ERR_NOMATCH);
2441         cleanup_push(gv, blk_cleanup);
2442         v = copyblk(v);
2443     }
2444     else {
2445         gv = NULL;
2446         v = copyblk(v);
2447         trim(v);
2448     }
2449
2450     Ggv = gv;
2451     state.evalvec = evalvec;
2452     state.evalp = evalp;
2453     state.didfds = didfds;
2454 #ifndef CLOSE_ON_EXEC
2455     state.didcch = didcch;
2456 #endif /* CLOSE_ON_EXEC */
2457     state.SHIN = SHIN;
2458     state.SHOUT = SHOUT;
2459     state.SHDIAG = SHDIAG;
2460
2461     (void)close_on_exec(state.saveIN = dcopy(SHIN, -1), 1);
2462     (void)close_on_exec(state.saveOUT = dcopy(SHOUT, -1), 1);
2463     (void)close_on_exec(state.saveDIAG = dcopy(SHDIAG, -1), 1);
2464
2465     cleanup_push(&state, doeval_cleanup);
2466
2467     getexit(osetexit);
2468
2469     /* PWP: setjmp/longjmp bugfix for optimizing compilers */
2470 #ifdef cray
2471     my_reenter = 1;             /* assume non-zero return val */
2472     if (setexit() == 0) {
2473         my_reenter = 0;         /* Oh well, we were wrong */
2474 #else /* !cray */
2475     if ((my_reenter = setexit()) == 0) {
2476 #endif /* cray */
2477         evalvec = v;
2478         evalp = 0;
2479         (void)close_on_exec(SHIN = dcopy(0, -1), 1);
2480         (void)close_on_exec(SHOUT = dcopy(1, -1), 1);
2481         (void)close_on_exec(SHDIAG = dcopy(2, -1), 1);
2482 #ifndef CLOSE_ON_EXEC
2483         didcch = 0;
2484 #endif /* CLOSE_ON_EXEC */
2485         didfds = 0;
2486         gv = Ggv;
2487         process(0);
2488         Ggv = gv;
2489     }
2490
2491     if (my_reenter == 0) {
2492         cleanup_until(&state);
2493         if (Ggv)
2494             cleanup_until(Ggv);
2495     }
2496
2497     resexit(osetexit);
2498     if (my_reenter)
2499         stderror(ERR_SILENT);
2500 }
2501
2502 /*************************************************************************/
2503 /* print list of builtin commands */
2504
2505 static void
2506 lbuffed_cleanup (void *dummy)
2507 {
2508     USE(dummy);
2509     lbuffed = 1;
2510 }
2511
2512 /*ARGSUSED*/
2513 void
2514 dobuiltins(Char **v, struct command *c)
2515 {
2516     /* would use print_by_column() in tw.parse.c but that assumes
2517      * we have an array of Char * to pass.. (sg)
2518      */
2519     const struct biltins *b;
2520     int row, col, columns, rows;
2521     unsigned int w, maxwidth;
2522
2523     USE(c);
2524     USE(v);
2525     lbuffed = 0;                /* turn off line buffering */
2526     cleanup_push(&lbuffed, lbuffed_cleanup);
2527
2528     /* find widest string */
2529     for (maxwidth = 0, b = bfunc; b < &bfunc[nbfunc]; ++b)
2530         maxwidth = max(maxwidth, strlen(b->bname));
2531     ++maxwidth;                                 /* for space */
2532
2533     columns = (TermH + 1) / maxwidth;   /* PWP: terminal size change */
2534     if (!columns)
2535         columns = 1;
2536     rows = (nbfunc + (columns - 1)) / columns;
2537
2538     for (b = bfunc, row = 0; row < rows; row++) {
2539         for (col = 0; col < columns; col++) {
2540             if (b < &bfunc[nbfunc]) {
2541                 w = strlen(b->bname);
2542                 xprintf("%s", b->bname);
2543                 if (col < (columns - 1))        /* Not last column? */
2544                     for (; w < maxwidth; w++)
2545                         xputchar(' ');
2546                 ++b;
2547             }
2548         }
2549         if (row < (rows - 1)) {
2550             if (Tty_raw_mode)
2551                 xputchar('\r');
2552             xputchar('\n');
2553         }
2554     }
2555 #ifdef WINNT_NATIVE
2556     nt_print_builtins(maxwidth);
2557 #else
2558     if (Tty_raw_mode)
2559         xputchar('\r');
2560     xputchar('\n');
2561 #endif /* WINNT_NATIVE */
2562
2563     cleanup_until(&lbuffed);            /* turn back on line buffering */
2564     flush();
2565 }
2566
2567 #ifdef NLS_CATALOGS
2568 char *
2569 xcatgets(nl_catd ctd, int set_id, int msg_id, const char *s)
2570 {
2571     char *res;
2572
2573     errno = 0;
2574     while ((res = catgets(ctd, set_id, msg_id, s)) == s && errno == EINTR) {
2575         handle_pending_signals();
2576         errno = 0;
2577     }
2578     return res;
2579 }
2580
2581
2582 # if defined(HAVE_ICONV) && defined(HAVE_NL_LANGINFO)
2583 char *
2584 iconv_catgets(nl_catd ctd, int set_id, int msg_id, const char *s)
2585 {
2586     static char *buf = NULL;
2587     static size_t buf_size = 0;
2588
2589     char *orig, *dest, *p;
2590     ICONV_CONST char *src;
2591     size_t src_size, dest_size;
2592
2593     orig = xcatgets(ctd, set_id, msg_id, s);
2594     if (catgets_iconv == (iconv_t)-1 || orig == s)
2595         return orig;
2596     src = orig;
2597     src_size = strlen(src) + 1;
2598     if (buf == NULL && (buf = xmalloc(buf_size = src_size + 32)) == NULL)
2599         return orig;
2600     dest = buf;
2601     while (src_size != 0) {
2602         dest_size = buf + buf_size - dest;
2603         if (iconv(catgets_iconv, &src, &src_size, &dest, &dest_size)
2604             == (size_t)-1) {
2605             switch (errno) {
2606             case E2BIG:
2607                 if ((p = xrealloc(buf, buf_size * 2)) == NULL)
2608                     return orig;
2609                 buf_size *= 2;
2610                 dest = p + (dest - buf);
2611                 buf = p;
2612                 break;
2613
2614             case EILSEQ: case EINVAL: default:
2615                 return orig;
2616             }
2617         }
2618     }
2619     return buf;
2620 }
2621 # endif /* HAVE_ICONV && HAVE_NL_LANGINFO */
2622 #endif /* NLS_CATALOGS */
2623
2624 void
2625 nlsinit(void)
2626 {
2627 #ifdef NLS_CATALOGS
2628     static const char default_catalog[] = "tcsh";
2629
2630     char *catalog = (char *)(intptr_t)default_catalog;
2631
2632     if (adrof(STRcatalog) != NULL)
2633         catalog = xasprintf("tcsh.%s", short2str(varval(STRcatalog)));
2634 #ifdef NL_CAT_LOCALE /* POSIX-compliant. */
2635     /*
2636      * Check if LC_MESSAGES is set in the environment and use it, if so.
2637      * If not, fall back to the setting of LANG.
2638      */
2639     catd = catopen(catalog, tgetenv(STRLC_MESSAGES) ? NL_CAT_LOCALE : 0);
2640 #else /* pre-POSIX */
2641 # ifndef MCLoadBySet
2642 #  define MCLoadBySet 0
2643 #  endif
2644     catd = catopen(catalog, MCLoadBySet);
2645 #endif
2646     if (catalog != default_catalog)
2647         xfree(catalog);
2648 #if defined(HAVE_ICONV) && defined(HAVE_NL_LANGINFO)
2649     /* xcatgets (), not CGETS, the charset name should be in ASCII anyway. */
2650     catgets_iconv = iconv_open (nl_langinfo (CODESET),
2651                                 xcatgets(catd, 255, 1, "UTF-8"));
2652 #endif /* HAVE_ICONV && HAVE_NL_LANGINFO */
2653 #endif /* NLS_CATALOGS */
2654 #ifdef WINNT_NATIVE
2655     nls_dll_init();
2656 #endif /* WINNT_NATIVE */
2657     errinit();          /* init the errorlist in correct locale */
2658     mesginit();         /* init the messages for signals */
2659     dateinit();         /* init the messages for dates */
2660     editinit();         /* init the editor messages */
2661     terminit();         /* init the termcap messages */
2662 }
2663
2664 void
2665 nlsclose(void)
2666 {
2667 #ifdef NLS_CATALOGS
2668 #if defined(HAVE_ICONV) && defined(HAVE_NL_LANGINFO)
2669     if (catgets_iconv != (iconv_t)-1) {
2670         iconv_close(catgets_iconv);
2671         catgets_iconv = (iconv_t)-1;
2672     }
2673 #endif /* HAVE_ICONV && HAVE_NL_LANGINFO */
2674     if (catd != (nl_catd)-1) {
2675         /*
2676          * catclose can call other functions which can call longjmp
2677          * making us re-enter this code. Prevent infinite recursion
2678          * by resetting catd. Problem reported and solved by:
2679          * Gerhard Niklasch
2680          */
2681         nl_catd oldcatd = catd;
2682         catd = (nl_catd)-1;
2683         while (catclose(oldcatd) == -1 && errno == EINTR)
2684             handle_pending_signals();
2685     }
2686 #endif /* NLS_CATALOGS */
2687 }