contrib/tcsh-6/sh.glob.c

   1 /*
   2  * sh.glob.c: Regular expression expansion
   3  */
   4 /*-
   5  * Copyright (c) 1980, 1991 The Regents of the University of California.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 #include "sh.h"
  33 #include "tc.h"
  34 #include "tw.h"
  35
  36 #include "glob.h"
  37
  38 /*
  39  * Values for gflag
  40  */
  41 #define G_NONE  0               /* No globbing needed                   */
  42 #define G_GLOB  1               /* string contains *?[] characters      */
  43 #define G_CSH   2               /* string contains ~`{ characters       */
  44
  45 #define GLOBSPACE       100     /* Alloc increment                      */
  46
  47
  48 #define LBRC '{'
  49 #define RBRC '}'
  50 #define LBRK '['
  51 #define RBRK ']'
  52 #define EOS '\0'
  53
  54 /*
  55  * globbing is now done in two stages. In the first pass we expand
  56  * csh globbing idioms ~`{ and then we proceed doing the normal
  57  * globbing if needed ?*[
  58  *
  59  * Csh type globbing is handled in globexpand() and the rest is
  60  * handled in glob() which is part of the 4.4BSD libc.
  61  *
  62  */
  63 static  Char     *globtilde     (Char *);
  64 static  Char     *handleone     (Char *, Char **, int);
  65 static  Char    **libglob       (Char **);
  66 static  Char    **globexpand    (Char **, int);
  67 static  int       globbrace     (const Char *, Char ***);
  68 static  void      expbrace      (Char ***, Char ***, int);
  69 static  void      pword         (struct blk_buf *, struct Strbuf *);
  70 static  void      backeval      (struct blk_buf *, struct Strbuf *, Char *,
  71                                  int);
  72 static Char *
  73 globtilde(Char *s)
  74 {
  75     Char *name, *u, *home, *res;
  76
  77     u = s;
  78
  79     if (s[1] == '~')
  80         return Strsave(s);
  81
  82     for (s++; *s && *s != '/' && *s != ':'; s++)
  83         continue;
  84
  85     name = Strnsave(u + 1, s - (u + 1));
  86     cleanup_push(name, xfree);
  87     home = gethdir(name);
  88     if (home == NULL) {
  89         if (adrof(STRnonomatch)) {
  90             cleanup_until(name);
  91             return u;
  92         }
  93         if (*name)
  94             stderror(ERR_UNKUSER, short2str(name));
  95         else
  96             stderror(ERR_NOHOME);
  97     }
  98     cleanup_until(name);
  99     if (home[0] == '/' && home[1] == '\0' && s[0] == '/')
 100         res = Strsave(s);
 101     else
 102         res = Strspl(home, s);
 103     xfree(home);
 104     xfree(u);
 105     return res;
 106 }
 107
 108 /* Returns a newly allocated string, old or NULL */
 109 Char *
 110 globequal(Char *old)
 111 {
 112     int     dig;
 113     const Char *dir;
 114     Char    *b;
 115
 116     /*
 117      * kfk - 17 Jan 1984 - stack hack allows user to get at arbitrary dir names
 118      * in stack. PWP: let =foobar pass through (for X windows)
 119      */
 120     if (old[1] == '-' && (old[2] == '\0' || old[2] == '/')) {
 121         /* =- */
 122         const Char *olddir = varval (STRowd);
 123
 124         if (olddir && *olddir &&
 125             !dcwd->di_next->di_name && !dcwd->di_prev->di_name)
 126             return Strspl(olddir, &old[2]);
 127         dig = -1;
 128         b = &old[2];
 129     }
 130     else if (Isdigit(old[1])) {
 131         /* =<number> */
 132         dig = old[1] - '0';
 133         for (b = &old[2]; Isdigit(*b); b++)
 134             dig = dig * 10 + (*b - '0');
 135         if (*b != '\0' && *b != '/')
 136             /* =<number>foobar */
 137             return old;
 138     }
 139     else
 140         /* =foobar */
 141         return old;
 142
 143     dir = getstakd(dig);
 144     if (dir == NULL)
 145         return NULL;
 146     return Strspl(dir, b);
 147 }
 148
 149 static int
 150 globbrace(const Char *s, Char ***bl)
 151 {
 152     struct Strbuf gbuf = Strbuf_INIT;
 153     struct blk_buf bb = BLK_BUF_INIT;
 154     int     i;
 155     const Char *p, *pm, *pe, *pl;
 156     size_t prefix_len;
 157
 158     /* copy part up to the brace */
 159     for (p = s; *p != LBRC; p++)
 160         ;
 161     prefix_len = p - s;
 162
 163     /* check for balanced braces */
 164     for (i = 0, pe = ++p; *pe; pe++)
 165         if (*pe == LBRK) {
 166             /* Ignore everything between [] */
 167             for (++pe; *pe != RBRK && *pe != EOS; pe++)
 168                 continue;
 169             if (*pe == EOS)
 170                 return (-RBRK);
 171         }
 172         else if (*pe == LBRC)
 173             i++;
 174         else if (*pe == RBRC) {
 175             if (i == 0)
 176                 break;
 177             i--;
 178         }
 179
 180     if (i != 0 || *pe == '\0')
 181         return (-RBRC);
 182
 183     Strbuf_appendn(&gbuf, s, prefix_len);
 184
 185     for (i = 0, pl = pm = p; pm <= pe; pm++)
 186         switch (*pm) {
 187         case LBRK:
 188             for (++pm; *pm != RBRK && *pm != EOS; pm++)
 189                 continue;
 190             if (*pm == EOS) {
 191                 bb_cleanup(&bb);
 192                 xfree(gbuf.s);
 193                 return (-RBRK);
 194             }
 195             break;
 196         case LBRC:
 197             i++;
 198             break;
 199         case RBRC:
 200             if (i) {
 201                 i--;
 202                 break;
 203             }
 204             /* FALLTHROUGH */
 205         case ',':
 206             if (i && *pm == ',')
 207                 break;
 208             else {
 209                 gbuf.len = prefix_len;
 210                 Strbuf_appendn(&gbuf, pl, pm - pl);
 211                 Strbuf_append(&gbuf, pe + 1);
 212                 Strbuf_terminate(&gbuf);
 213                 bb_append(&bb, Strsave(gbuf.s));
 214                 pl = pm + 1;
 215             }
 216             break;
 217         default:
 218             break;
 219         }
 220     *bl = bb_finish(&bb);
 221     xfree(gbuf.s);
 222     return bb.len;
 223 }
 224
 225
 226 static void
 227 expbrace(Char ***nvp, Char ***elp, int size)
 228 {
 229     Char **vl, **el, **nv, *s;
 230
 231     vl = nv = *nvp;
 232     if (elp != NULL)
 233         el = *elp;
 234     else
 235         el = vl + blklen(vl);
 236
 237     for (s = *vl; s; s = *++vl) {
 238         Char  **vp, **bp;
 239
 240         /* leave {} untouched for find */
 241         if (s[0] == '{' && (s[1] == '\0' || (s[1] == '}' && s[2] == '\0')))
 242             continue;
 243         if (Strchr(s, '{') != NULL) {
 244             Char  **bl = NULL;
 245             int     len;
 246
 247             if ((len = globbrace(s, &bl)) < 0)
 248                 stderror(ERR_MISSING, -len);
 249             xfree(s);
 250             if (len == 1) {
 251                 *vl-- = *bl;
 252                 xfree(bl);
 253                 continue;
 254             }
 255             if (&el[len] >= &nv[size]) {
 256                 size_t l, e;
 257                 l = &el[len] - &nv[size];
 258                 size += GLOBSPACE > l ? GLOBSPACE : l;
 259                 l = vl - nv;
 260                 e = el - nv;
 261                 nv = xrealloc(nv, size * sizeof(Char *));
 262                 *nvp = nv; /* To keep cleanups working */
 263                 vl = nv + l;
 264                 el = nv + e;
 265             }
 266             /* nv vl   el     bl
 267              * |  |    |      |
 268              * -.--..--       x--
 269              *   |            len
 270              *   vp
 271              */
 272             vp = vl--;
 273             *vp = *bl;
 274             len--;
 275             for (bp = el; bp != vp; bp--)
 276                 bp[len] = *bp;
 277             el += len;
 278             /* nv vl    el bl
 279              * |  |     |  |
 280              * -.-x  ---    --
 281              *   |len
 282              *   vp
 283              */
 284             vp++;
 285             for (bp = bl + 1; *bp; *vp++ = *bp++)
 286                 continue;
 287             xfree(bl);
 288         }
 289
 290     }
 291     if (elp != NULL)
 292         *elp = el;
 293 }
 294
 295 static Char **
 296 globexpand(Char **v, int noglob)
 297 {
 298     Char   *s;
 299     Char  ***fnv, **vl, **el;
 300     int     size = GLOBSPACE;
 301
 302
 303     fnv = xmalloc(sizeof(Char ***));
 304     *fnv = vl = xmalloc(sizeof(Char *) * size);
 305     *vl = NULL;
 306     cleanup_push(fnv, blk_indirect_cleanup);
 307
 308     /*
 309      * Step 1: expand backquotes.
 310      */
 311     while ((s = *v++) != NULL) {
 312         if (Strchr(s, '`')) {
 313             int     i;
 314             Char **expanded;
 315
 316             expanded = dobackp(s, 0);
 317             for (i = 0; expanded[i] != NULL; i++) {
 318                 *vl++ = expanded[i];
 319                 if (vl == &(*fnv)[size]) {
 320                     size += GLOBSPACE;
 321                     *fnv = xrealloc(*fnv, size * sizeof(Char *));
 322                     vl = &(*fnv)[size - GLOBSPACE];
 323                 }
 324             }
 325             xfree(expanded);
 326         }
 327         else {
 328             *vl++ = Strsave(s);
 329             if (vl == &(*fnv)[size]) {
 330                 size += GLOBSPACE;
 331                 *fnv = xrealloc(*fnv, size * sizeof(Char *));
 332                 vl = &(*fnv)[size - GLOBSPACE];
 333             }
 334         }
 335         *vl = NULL;
 336     }
 337
 338     if (noglob)
 339         goto done;
 340
 341     /*
 342      * Step 2: expand braces
 343      */
 344     el = vl;
 345     expbrace(fnv, &el, size);
 346
 347
 348     /*
 349      * Step 3: expand ~ =
 350      */
 351     vl = *fnv;
 352     for (s = *vl; s; s = *++vl)
 353         switch (*s) {
 354             Char *ns;
 355         case '~':
 356             *vl = globtilde(s);
 357             break;
 358         case '=':
 359             if ((ns = globequal(s)) == NULL) {
 360                 if (!adrof(STRnonomatch))
 361                     stderror(ERR_DEEP); /* Error */
 362             }
 363             if (ns && ns != s) {
 364                 /* Expansion succeeded */
 365                 xfree(s);
 366                 *vl = ns;
 367             }
 368             break;
 369         default:
 370             break;
 371         }
 372     vl = *fnv;
 373
 374     /*
 375      * Step 4: expand .. if the variable symlinks==expand is set
 376      */
 377     if (symlinks == SYM_EXPAND) {
 378         for (s = *vl; s; s = *++vl) {
 379             *vl = dnormalize(s, 1);
 380             xfree(s);
 381         }
 382     }
 383
 384  done:
 385     cleanup_ignore(fnv);
 386     cleanup_until(fnv);
 387     vl = *fnv;
 388     xfree(fnv);
 389     return vl;
 390 }
 391
 392 static Char *
 393 handleone(Char *str, Char **vl, int action)
 394 {
 395     size_t chars;
 396     Char **t, *p, *strp;
 397
 398     switch (action) {
 399     case G_ERROR:
 400         setname(short2str(str));
 401         blkfree(vl);
 402         stderror(ERR_NAME | ERR_AMBIG);
 403         break;
 404     case G_APPEND:
 405         chars = 0;
 406         for (t = vl; (p = *t++) != NULL; chars++)
 407             chars += Strlen(p);
 408         str = xmalloc(chars * sizeof(Char));
 409         for (t = vl, strp = str; (p = *t++) != NULL; chars++) {
 410             while (*p)
 411                  *strp++ = *p++ & TRIM;
 412             *strp++ = ' ';
 413         }
 414         *--strp = '\0';
 415         blkfree(vl);
 416         break;
 417     case G_IGNORE:
 418         str = Strsave(strip(*vl));
 419         blkfree(vl);
 420         break;
 421     default:
 422         break;
 423     }
 424     return (str);
 425 }
 426
 427 static Char **
 428 libglob(Char **vl)
 429 {
 430     int     gflgs = GLOB_QUOTE | GLOB_NOMAGIC | GLOB_ALTNOT;
 431     glob_t  globv;
 432     char   *ptr;
 433     int     nonomatch = adrof(STRnonomatch) != 0, magic = 0, match = 0;
 434
 435     if (adrof(STRglobdot))
 436        gflgs |= GLOB_DOT;
 437
 438     if (adrof(STRglobstar))
 439        gflgs |= GLOB_STAR;
 440
 441     if (!vl || !vl[0])
 442         return(vl);
 443
 444     globv.gl_offs = 0;
 445     globv.gl_pathv = 0;
 446     globv.gl_pathc = 0;
 447
 448     if (nonomatch)
 449         gflgs |= GLOB_NOCHECK;
 450
 451     do {
 452         ptr = short2qstr(*vl);
 453         switch (glob(ptr, gflgs, 0, &globv)) {
 454         case GLOB_ABEND:
 455             globfree(&globv);
 456             setname(ptr);
 457             stderror(ERR_NAME | ERR_GLOB);
 458             /* NOTREACHED */
 459         case GLOB_NOSPACE:
 460             globfree(&globv);
 461             stderror(ERR_NOMEM);
 462             /* NOTREACHED */
 463         default:
 464             break;
 465         }
 466         if (globv.gl_flags & GLOB_MAGCHAR) {
 467             match |= (globv.gl_matchc != 0);
 468             magic = 1;
 469         }
 470         gflgs |= GLOB_APPEND;
 471     }
 472     while (*++vl);
 473     vl = (globv.gl_pathc == 0 || (magic && !match && !nonomatch)) ?
 474         NULL : blk2short(globv.gl_pathv);
 475     globfree(&globv);
 476     return (vl);
 477 }
 478
 479 Char   *
 480 globone(Char *str, int action)
 481 {
 482     Char   *v[2], **vl, **vo;
 483     int gflg, noglob;
 484
 485     noglob = adrof(STRnoglob) != 0;
 486     v[0] = str;
 487     v[1] = 0;
 488     gflg = tglob(v);
 489     if (gflg == G_NONE)
 490         return (strip(Strsave(str)));
 491
 492     if (gflg & G_CSH) {
 493         /*
 494          * Expand back-quote, tilde and brace
 495          */
 496         vo = globexpand(v, noglob);
 497         if (noglob || (gflg & G_GLOB) == 0) {
 498             vl = vo;
 499             goto result;
 500         }
 501         cleanup_push(vo, blk_cleanup);
 502     }
 503     else if (noglob || (gflg & G_GLOB) == 0)
 504         return (strip(Strsave(str)));
 505     else
 506         vo = v;
 507
 508     vl = libglob(vo);
 509     if (gflg & G_CSH) {
 510         if (vl != vo)
 511             cleanup_until(vo);
 512         else
 513             cleanup_ignore(vo);
 514     }
 515     if (vl == NULL) {
 516         setname(short2str(str));
 517         stderror(ERR_NAME | ERR_NOMATCH);
 518     }
 519  result:
 520     if (vl && vl[0] == NULL) {
 521         if (vl != v)
 522             xfree(vl);
 523         return (Strsave(STRNULL));
 524     }
 525     if (vl && vl[1])
 526         return (handleone(str, vl, action));
 527     else {
 528         str = strip(*vl);
 529         if (vl != v)
 530             xfree(vl);
 531         return (str);
 532     }
 533 }
 534
 535 Char  **
 536 globall(Char **v, int gflg)
 537 {
 538     Char  **vl, **vo;
 539     int noglob;
 540
 541     if (!v || !v[0])
 542         return saveblk(v);
 543
 544     noglob = adrof(STRnoglob) != 0;
 545
 546     if (gflg & G_CSH)
 547         /*
 548          * Expand back-quote, tilde and brace
 549          */
 550         vl = vo = globexpand(v, noglob);
 551     else
 552         vl = vo = saveblk(v);
 553
 554     if (!noglob && (gflg & G_GLOB)) {
 555         cleanup_push(vo, blk_cleanup);
 556         vl = libglob(vo);
 557         if (vl == vo)
 558             cleanup_ignore(vo);
 559         cleanup_until(vo);
 560     }
 561     else
 562         trim(vl);
 563
 564     return vl;
 565 }
 566
 567 Char **
 568 glob_all_or_error(Char **v)
 569 {
 570     int gflag;
 571
 572     gflag = tglob(v);
 573     if (gflag) {
 574         v = globall(v, gflag);
 575         if (v == NULL)
 576             stderror(ERR_NAME | ERR_NOMATCH);
 577     } else {
 578         v = saveblk(v);
 579         trim(v);
 580     }
 581     return v;
 582 }
 583
 584 void
 585 rscan(Char **t, void (*f) (Char))
 586 {
 587     Char *p;
 588
 589     while ((p = *t++) != NULL)
 590         while (*p)
 591             (*f) (*p++);
 592 }
 593
 594 void
 595 trim(Char **t)
 596 {
 597     Char *p;
 598
 599     while ((p = *t++) != NULL)
 600         while (*p) {
 601 #if INVALID_BYTE != 0
 602             if ((*p & INVALID_BYTE) != INVALID_BYTE)    /* *p < INVALID_BYTE */
 603 #endif
 604                 *p &= TRIM;
 605             p++;
 606         }
 607 }
 608
 609 int
 610 tglob(Char **t)
 611 {
 612     int gflag;
 613     const Char *p;
 614
 615     gflag = 0;
 616     while ((p = *t++) != NULL) {
 617         if (*p == '~' || *p == '=')
 618             gflag |= G_CSH;
 619         else if (*p == '{' &&
 620                  (p[1] == '\0' || (p[1] == '}' && p[2] == '\0')))
 621             continue;
 622         while (*p != '\0') {
 623             if (*p == '`') {
 624                 gflag |= G_CSH;
 625 #ifdef notdef
 626                 /*
 627                  * We do want to expand echo `echo '*'`, so we don't\
 628                  * use this piece of code anymore.
 629                  */
 630                 p++;
 631                 while (*p && *p != '`')
 632                     if (*p++ == '\\') {
 633                         if (*p)         /* Quoted chars */
 634                             p++;
 635                         else
 636                             break;
 637                     }
 638                 if (!*p)                /* The matching ` */
 639                     break;
 640 #endif
 641             }
 642             else if (*p == '{')
 643                 gflag |= G_CSH;
 644             else if (isglob(*p))
 645                 gflag |= G_GLOB;
 646             else if (symlinks == SYM_EXPAND &&
 647                 p[1] && ISDOTDOT(p) && (p == *(t-1) || *(p-1) == '/') )
 648                 gflag |= G_CSH;
 649             p++;
 650         }
 651     }
 652     return gflag;
 653 }
 654
 655 /*
 656  * Command substitute cp.  If literal, then this is a substitution from a
 657  * << redirection, and so we should not crunch blanks and tabs, separating
 658  * words only at newlines.
 659  */
 660 Char  **
 661 dobackp(Char *cp, int literal)
 662 {
 663     struct Strbuf word = Strbuf_INIT;
 664     struct blk_buf bb = BLK_BUF_INIT;
 665     Char *lp, *rp, *ep;
 666
 667     cleanup_push(&bb, bb_cleanup);
 668     cleanup_push(&word, Strbuf_cleanup);
 669     for (;;) {
 670         for (lp = cp; *lp != '\0' && *lp != '`'; lp++)
 671             ;
 672         Strbuf_appendn(&word, cp, lp - cp);
 673         if (*lp == 0)
 674             break;
 675         lp++;
 676         for (rp = lp; *rp && *rp != '`'; rp++)
 677             if (*rp == '\\') {
 678                 rp++;
 679                 if (!*rp)
 680                     goto oops;
 681             }
 682         if (!*rp) {
 683         oops:
 684             cleanup_until(&bb);
 685             stderror(ERR_UNMATCHED, '`');
 686         }
 687         ep = Strnsave(lp, rp - lp);
 688         cleanup_push(ep, xfree);
 689         backeval(&bb, &word, ep, literal);
 690         cleanup_until(ep);
 691         cp = rp + 1;
 692     }
 693     if (word.len != 0)
 694         pword(&bb, &word);
 695     cleanup_ignore(&bb);
 696     cleanup_until(&bb);
 697     return bb_finish(&bb);
 698 }
 699
 700
 701 static void
 702 backeval(struct blk_buf *bb, struct Strbuf *word, Char *cp, int literal)
 703 {
 704     ssize_t icnt;
 705     Char c, *ip;
 706     struct command faket;
 707     int    hadnl;
 708     int     pvec[2], quoted;
 709     Char   *fakecom[2], ibuf[BUFSIZE];
 710
 711     hadnl = 0;
 712     icnt = 0;
 713     if (!literal) {
 714         for (ip = cp; (*ip & QUOTE) != 0; ip++)
 715                 continue;
 716         quoted = *ip == '\0';
 717     } else
 718         quoted = literal;
 719     faket.t_dtyp = NODE_COMMAND;
 720     faket.t_dflg = F_BACKQ;
 721     faket.t_dlef = 0;
 722     faket.t_drit = 0;
 723     faket.t_dspr = 0;
 724     faket.t_dcom = fakecom;
 725     fakecom[0] = STRfakecom1;
 726     fakecom[1] = 0;
 727
 728     /*
 729      * We do the psave job to temporarily change the current job so that the
 730      * following fork is considered a separate job.  This is so that when
 731      * backquotes are used in a builtin function that calls glob the "current
 732      * job" is not corrupted.  We only need one level of pushed jobs as long as
 733      * we are sure to fork here.
 734      */
 735     psavejob();
 736     cleanup_push(&faket, psavejob_cleanup); /* faket is only a marker */
 737
 738     /*
 739      * It would be nicer if we could integrate this redirection more with the
 740      * routines in sh.sem.c by doing a fake execute on a builtin function that
 741      * was piped out.
 742      */
 743     mypipe(pvec);
 744     cleanup_push(&pvec[0], open_cleanup);
 745     cleanup_push(&pvec[1], open_cleanup);
 746     if (pfork(&faket, -1) == 0) {
 747         jmp_buf_t osetexit;
 748         struct command *t;
 749         size_t omark;
 750
 751         xclose(pvec[0]);
 752         (void) dmove(pvec[1], 1);
 753         (void) dmove(SHDIAG,  2);
 754         initdesc();
 755         closem();
 756         arginp = cp;
 757         for (arginp = cp; *cp; cp++) {
 758             *cp &= TRIM;
 759             if (is_set(STRcsubstnonl) && (*cp == '\n' || *cp == '\r'))
 760                 *cp = ' ';
 761         }
 762
 763         /*
 764          * In the child ``forget'' everything about current aliases or
 765          * eval vectors.
 766          */
 767         alvec = NULL;
 768         evalvec = NULL;
 769         alvecp = NULL;
 770         evalp = NULL;
 771
 772         omark = cleanup_push_mark();
 773         getexit(osetexit);
 774         for (;;) {
 775             struct wordent paraml1;
 776             initlex(&paraml1);
 777
 778             (void) setexit();
 779             justpr = 0;
 780
 781             if (haderr) {
 782                 /* unwind */
 783                 doneinp = 0;
 784                 cleanup_pop_mark(omark);
 785                 resexit(osetexit);
 786                 reset();
 787             }
 788             if (seterr) {
 789                 xfree(seterr);
 790                 seterr = NULL;
 791             }
 792
 793             freelex(&paraml1);
 794             (void) lex(&paraml1);
 795             cleanup_push(&paraml1, lex_cleanup);
 796             if (seterr)
 797                 stderror(ERR_OLD);
 798             alias(&paraml1);
 799             t = syntax(paraml1.next, &paraml1, 0);
 800             cleanup_push(t, syntax_cleanup);
 801             /* The F_BACKQ flag must set so the job output is correct if
 802              * printexitvalue is set.  If it's not set, the job output
 803              * will have "Exit N" appended where N is the exit status. */
 804             if (t)
 805                     t->t_dflg = F_BACKQ|F_NOFORK;
 806             if (seterr)
 807                 stderror(ERR_OLD);
 808 #ifdef SIGTSTP
 809             signal(SIGTSTP, SIG_IGN);
 810 #endif
 811 #ifdef SIGTTIN
 812             signal(SIGTTIN, SIG_IGN);
 813 #endif
 814 #ifdef SIGTTOU
 815             signal(SIGTTOU, SIG_IGN);
 816 #endif
 817             execute(t, -1, NULL, NULL, TRUE);
 818
 819             cleanup_until(&paraml1);
 820         }
 821     }
 822     cleanup_until(&pvec[1]);
 823     c = 0;
 824     ip = NULL;
 825     do {
 826         ssize_t     cnt = 0;
 827
 828         for (;;) {
 829             if (icnt == 0) {
 830                 ip = ibuf;
 831                 icnt = wide_read(pvec[0], ibuf, BUFSIZE, 0);
 832                 if (icnt <= 0)
 833                     goto eof;
 834             }
 835             if (hadnl)
 836                 break;
 837             --icnt;
 838             c = (*ip++ & TRIM);
 839             if (c == 0)
 840                 break;
 841 #if defined(WINNT_NATIVE) || defined(__CYGWIN__)
 842             if (c == '\r')
 843                 c = ' ';
 844 #endif /* WINNT_NATIVE || __CYGWIN__ */
 845             if (c == '\n') {
 846                 /*
 847                  * Continue around the loop one more time, so that we can eat
 848                  * the last newline without terminating this word.
 849                  */
 850                 hadnl = 1;
 851                 continue;
 852             }
 853             if (!quoted && (c == ' ' || c == '\t'))
 854                 break;
 855             cnt++;
 856             if (c == '\\' || quoted)
 857                 c |= QUOTE;
 858             Strbuf_append1(word, c);
 859         }
 860         /*
 861          * Unless at end-of-file, we will form a new word here if there were
 862          * characters in the word, or in any case when we take text literally.
 863          * If we didn't make empty words here when literal was set then we
 864          * would lose blank lines.
 865          */
 866         if (c != 0 && (cnt || literal))
 867             pword(bb, word);
 868         hadnl = 0;
 869     } while (c > 0);
 870  eof:
 871     cleanup_until(&pvec[0]);
 872     pwait();
 873     cleanup_until(&faket); /* psavejob_cleanup(); */
 874 }
 875
 876 static void
 877 pword(struct blk_buf *bb, struct Strbuf *word)
 878 {
 879     Char *s;
 880
 881     s = Strbuf_finish(word);
 882     bb_append(bb, s);
 883     *word = Strbuf_init;
 884 }
 885
 886 int
 887 Gmatch(const Char *string, const Char *pattern)
 888 {
 889     return Gnmatch(string, pattern, NULL);
 890 }
 891
 892 int
 893 Gnmatch(const Char *string, const Char *pattern, const Char **endstr)
 894 {
 895     Char ***fblk, **p;
 896     const Char *tstring = string;
 897     int    gpol = 1, gres = 0;
 898
 899     if (*pattern == '^') {
 900         gpol = 0;
 901         pattern++;
 902     }
 903
 904     fblk = xmalloc(sizeof(Char ***));
 905     *fblk = xmalloc(GLOBSPACE * sizeof(Char *));
 906     (*fblk)[0] = Strsave(pattern);
 907     (*fblk)[1] = NULL;
 908
 909     cleanup_push(fblk, blk_indirect_cleanup);
 910     expbrace(fblk, NULL, GLOBSPACE);
 911
 912     if (endstr == NULL)
 913         /* Exact matches only */
 914         for (p = *fblk; *p; p++)
 915             gres |= t_pmatch(string, *p, &tstring, 1) == 2 ? 1 : 0;
 916     else {
 917         const Char *end;
 918
 919         /* partial matches */
 920         end = Strend(string);
 921         for (p = *fblk; *p; p++)
 922             if (t_pmatch(string, *p, &tstring, 1) != 0) {
 923                 gres |= 1;
 924                 if (end > tstring)
 925                     end = tstring;
 926             }
 927         *endstr = end;
 928     }
 929
 930     cleanup_until(fblk);
 931     return(gres == gpol);
 932 }
 933
 934 /* t_pmatch():
 935  *      Return 2 on exact match,
 936  *      Return 1 on substring match.
 937  *      Return 0 on no match.
 938  *      *estr will point to the end of the longest exact or substring match.
 939  */
 940 int
 941 t_pmatch(const Char *string, const Char *pattern, const Char **estr, int cs)
 942 {
 943     Char stringc, patternc, rangec;
 944     int     match, negate_range;
 945     const Char *pestr, *nstring;
 946
 947     for (nstring = string;; string = nstring) {
 948         stringc = *nstring++ & TRIM;
 949         patternc = *pattern++ & TRIM;
 950         switch (patternc) {
 951         case '\0':
 952             *estr = string;
 953             return (stringc == '\0' ? 2 : 1);
 954         case '?':
 955             if (stringc == 0)
 956                 return (0);
 957             break;
 958         case '*':
 959             if (!*pattern) {
 960                 *estr = Strend(string);
 961                 return (2);
 962             }
 963             pestr = NULL;
 964
 965             for (;;) {
 966                 switch(t_pmatch(string, pattern, estr, cs)) {
 967                 case 0:
 968                     break;
 969                 case 1:
 970                     pestr = *estr;/*FIXME: does not guarantee longest match */
 971                     break;
 972                 case 2:
 973                     return 2;
 974                 default:
 975                     abort();    /* Cannot happen */
 976                 }
 977                 stringc = *string++ & TRIM;
 978                 if (!stringc)
 979                     break;
 980             }
 981
 982             if (pestr) {
 983                 *estr = pestr;
 984                 return 1;
 985             }
 986             else
 987                 return 0;
 988
 989         case '[':
 990             match = 0;
 991             if ((negate_range = (*pattern == '^')) != 0)
 992                 pattern++;
 993             while ((rangec = *pattern++ & TRIM) != '\0') {
 994                 if (rangec == ']')
 995                     break;
 996                 if (match)
 997                     continue;
 998                 if (*pattern == '-' && pattern[1] != ']') {
 999                     Char rangec2;
1000                     pattern++;
1001                     rangec2 = *pattern++ & TRIM;
1002                     match = (globcharcoll(stringc, rangec2, 0) <= 0 &&
1003                         globcharcoll(rangec, stringc, 0) <= 0);
1004                 }
1005                 else
1006                     match = (stringc == rangec);
1007             }
1008             if (rangec == '\0')
1009                 stderror(ERR_NAME | ERR_MISSING, ']');
1010             if ((!match) && (stringc == '\0'))
1011                 return (0);
1012             if (match == negate_range)
1013                 return (0);
1014             break;
1015         default:
1016             if (cs ? patternc  != stringc
1017                 : Tolower(patternc) != Tolower(stringc))
1018                 return (0);
1019             break;
1020         }
1021     }
1022 }