contrib/tcsh/glob.c

   1 /*
   2  * Copyright (c) 1989 The Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Guido van Rossum.
   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 #if defined(LIBC_SCCS) && !defined(lint)
  33 static char sccsid[] = "@(#)glob.c      5.12 (Berkeley) 6/24/91";
  34 #endif /* LIBC_SCCS and not lint */
  35 /*
  36  * Glob: the interface is a superset of the one defined in POSIX 1003.2,
  37  * draft 9.
  38  *
  39  * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
  40  *
  41  * Optional extra services, controlled by flags not defined by POSIX:
  42  *
  43  * GLOB_QUOTE:
  44  *      Escaping convention: \ inhibits any special meaning the following
  45  *      character might have (except \ at end of string is retained).
  46  * GLOB_MAGCHAR:
  47  *      Set in gl_flags if pattern contained a globbing character.
  48  * GLOB_ALTNOT:
  49  *      Use ^ instead of ! for "not".
  50  * gl_matchc:
  51  *      Number of matches in the current invocation of glob.
  52  */
  53
  54 #ifdef notdef
  55 #include <sys/types.h>
  56 #include <sys/param.h>
  57 #include <sys/stat.h>
  58 #include <dirent.h>
  59 #include <ctype.h>
  60 typedef void * ptr_t;
  61 #endif
  62 #ifdef WINNT_NATIVE
  63         #pragma warning(disable:4244)
  64 #endif /* WINNT_NATIVE */
  65
  66 #define Char __Char
  67 #include "sh.h"
  68 #undef Char
  69 #undef QUOTE
  70 #undef TILDE
  71 #undef META
  72 #undef CHAR
  73 #undef ismeta
  74 #undef Strchr
  75
  76 #include "glob.h"
  77
  78 #ifndef S_ISDIR
  79 #define S_ISDIR(a)      (((a) & S_IFMT) == S_IFDIR)
  80 #endif
  81
  82 #if !defined(S_ISLNK) && defined(S_IFLNK)
  83 #define S_ISLNK(a)      (((a) & S_IFMT) == S_IFLNK)
  84 #endif
  85
  86 #if !defined(S_ISLNK) && !defined(lstat)
  87 #define lstat stat
  88 #endif
  89
  90 typedef unsigned short Char;
  91
  92 static  int      glob1          __P((Char *, glob_t *, int));
  93 static  int      glob2          __P((Char *, Char *, Char *, glob_t *, int));
  94 static  int      glob3          __P((Char *, Char *, Char *, Char *,
  95                                      glob_t *, int));
  96 static  int      globextend     __P((Char *, glob_t *));
  97 static  int      match          __P((Char *, Char *, Char *, int));
  98 #ifndef __clipper__
  99 static  int      compare        __P((const ptr_t, const ptr_t));
 100 #endif
 101 static  DIR     *Opendir        __P((Char *));
 102 #ifdef S_IFLNK
 103 static  int      Lstat          __P((Char *, struct stat *));
 104 #endif
 105 static  int      Stat           __P((Char *, struct stat *sb));
 106 static  Char    *Strchr         __P((Char *, int));
 107 #ifdef DEBUG
 108 static  void     qprintf        __P((Char *));
 109 #endif
 110
 111 #define DOLLAR          '$'
 112 #define DOT             '.'
 113 #define EOS             '\0'
 114 #define LBRACKET        '['
 115 #define NOT             '!'
 116 #define ALTNOT          '^'
 117 #define QUESTION        '?'
 118 #define QUOTE           '\\'
 119 #define RANGE           '-'
 120 #define RBRACKET        ']'
 121 #define SEP             '/'
 122 #define STAR            '*'
 123 #define TILDE           '~'
 124 #define UNDERSCORE      '_'
 125
 126 #define M_META          0x8000
 127 #define M_PROTECT       0x4000
 128 #define M_MASK          0xffff
 129 #define M_ASCII         0x00ff
 130
 131 #define CHAR(c)         ((c)&M_ASCII)
 132 #define META(c)         ((c)|M_META)
 133 #define M_ALL           META('*')
 134 #define M_END           META(']')
 135 #define M_NOT           META('!')
 136 #define M_ALTNOT        META('^')
 137 #define M_ONE           META('?')
 138 #define M_RNG           META('-')
 139 #define M_SET           META('[')
 140 #define ismeta(c)       (((c)&M_META) != 0)
 141
 142 #ifndef BUFSIZE
 143 #define GLOBBUFLEN      MAXPATHLEN
 144 #else
 145 #define GLOBBUFLEN      BUFSIZE
 146 #endif
 147
 148 int
 149 globcharcoll(c1, c2)
 150     int c1, c2;
 151 {
 152 #if defined(NLS) && defined(LC_COLLATE) && !defined(NOSTRCOLL)
 153     char s1[2], s2[2];
 154
 155     if (c1 == c2)
 156         return (0);
 157     /*
 158      * From kevin lyda <kevin@suberic.net>:
 159      * strcoll does not guarantee case sorting, so we pre-process now:
 160      */
 161     if (islower(c1) && isupper(c2))
 162         return (1);
 163     s1[0] = c1;
 164     s2[0] = c2;
 165     s1[1] = s2[1] = '\0';
 166     return strcoll(s1, s2);
 167 #else
 168     return (c1 - c2);
 169 #endif
 170 }
 171
 172 /*
 173  * Need to dodge two kernel bugs:
 174  * opendir("") != opendir(".")
 175  * NAMEI_BUG: on plain files trailing slashes are ignored in some kernels.
 176  *            POSIX specifies that they should be ignored in directories.
 177  */
 178
 179 static DIR *
 180 Opendir(str)
 181     register Char *str;
 182 {
 183     char    buf[GLOBBUFLEN];
 184     register char *dc = buf;
 185 #if defined(hpux) || defined(__hpux)
 186     struct stat st;
 187 #endif
 188
 189     if (!*str)
 190         return (opendir("."));
 191     while ((*dc++ = *str++) != '\0')
 192         continue;
 193 #if defined(hpux) || defined(__hpux)
 194     /*
 195      * Opendir on some device files hangs, so avoid it
 196      */
 197     if (stat(buf, &st) == -1 || !S_ISDIR(st.st_mode))
 198         return NULL;
 199 #endif
 200     return (opendir(buf));
 201 }
 202
 203 #ifdef S_IFLNK
 204 static int
 205 Lstat(fn, sb)
 206     register Char *fn;
 207     struct stat *sb;
 208 {
 209     char    buf[GLOBBUFLEN];
 210     register char *dc = buf;
 211
 212     while ((*dc++ = *fn++) != '\0')
 213         continue;
 214 # ifdef NAMEI_BUG
 215     {
 216         int     st;
 217
 218         st = lstat(buf, sb);
 219         if (*buf)
 220             dc--;
 221         return (*--dc == '/' && !S_ISDIR(sb->st_mode) ? -1 : st);
 222     }
 223 # else
 224     return (lstat(buf, sb));
 225 # endif /* NAMEI_BUG */
 226 }
 227 #else
 228 #define Lstat Stat
 229 #endif /* S_IFLNK */
 230
 231 static int
 232 Stat(fn, sb)
 233     register Char *fn;
 234     struct stat *sb;
 235 {
 236     char    buf[GLOBBUFLEN];
 237     register char *dc = buf;
 238
 239     while ((*dc++ = *fn++) != '\0')
 240         continue;
 241 #ifdef NAMEI_BUG
 242     {
 243         int     st;
 244
 245         st = stat(buf, sb);
 246         if (*buf)
 247             dc--;
 248         return (*--dc == '/' && !S_ISDIR(sb->st_mode) ? -1 : st);
 249     }
 250 #else
 251     return (stat(buf, sb));
 252 #endif /* NAMEI_BUG */
 253 }
 254
 255 static Char *
 256 Strchr(str, ch)
 257     Char *str;
 258     int ch;
 259 {
 260     do
 261         if (*str == ch)
 262             return (str);
 263     while (*str++);
 264     return (NULL);
 265 }
 266
 267 #ifdef DEBUG
 268 static void
 269 qprintf(s)
 270 Char *s;
 271 {
 272     Char *p;
 273
 274     for (p = s; *p; p++)
 275         printf("%c", *p & 0xff);
 276     printf("\n");
 277     for (p = s; *p; p++)
 278         printf("%c", *p & M_PROTECT ? '"' : ' ');
 279     printf("\n");
 280     for (p = s; *p; p++)
 281         printf("%c", *p & M_META ? '_' : ' ');
 282     printf("\n");
 283 }
 284 #endif /* DEBUG */
 285
 286 static int
 287 compare(p, q)
 288     const ptr_t  p, q;
 289 {
 290 #if defined(NLS) && !defined(NOSTRCOLL)
 291     errno = 0;  /* strcoll sets errno, another brain-damage */
 292
 293     return (strcoll(*(char **) p, *(char **) q));
 294 #else
 295     return (strcmp(*(char **) p, *(char **) q));
 296 #endif /* NLS && !NOSTRCOLL */
 297 }
 298
 299 /*
 300  * The main glob() routine: compiles the pattern (optionally processing
 301  * quotes), calls glob1() to do the real pattern matching, and finally
 302  * sorts the list (unless unsorted operation is requested).  Returns 0
 303  * if things went well, nonzero if errors occurred.  It is not an error
 304  * to find no matches.
 305  */
 306 int
 307 glob(pattern, flags, errfunc, pglob)
 308     const char *pattern;
 309     int     flags;
 310     int     (*errfunc) __P((const char *, int));
 311     glob_t *pglob;
 312 {
 313     int     err, oldpathc;
 314     Char *bufnext, *bufend, *compilebuf, m_not;
 315     const unsigned char *compilepat, *patnext;
 316     int     c, not;
 317     Char patbuf[GLOBBUFLEN + 1], *qpatnext;
 318     int     no_match;
 319
 320     patnext = (unsigned char *) pattern;
 321     if (!(flags & GLOB_APPEND)) {
 322         pglob->gl_pathc = 0;
 323         pglob->gl_pathv = NULL;
 324         if (!(flags & GLOB_DOOFFS))
 325             pglob->gl_offs = 0;
 326     }
 327     pglob->gl_flags = flags & ~GLOB_MAGCHAR;
 328     pglob->gl_errfunc = errfunc;
 329     oldpathc = pglob->gl_pathc;
 330     pglob->gl_matchc = 0;
 331
 332     if (pglob->gl_flags & GLOB_ALTNOT) {
 333         not = ALTNOT;
 334         m_not = M_ALTNOT;
 335     }
 336     else {
 337         not = NOT;
 338         m_not = M_NOT;
 339     }
 340
 341     bufnext = patbuf;
 342     bufend = bufnext + GLOBBUFLEN;
 343     compilebuf = bufnext;
 344     compilepat = patnext;
 345
 346     no_match = *patnext == not;
 347     if (no_match)
 348         patnext++;
 349
 350     if (flags & GLOB_QUOTE) {
 351         /* Protect the quoted characters */
 352         while (bufnext < bufend && (c = *patnext++) != EOS)
 353 #ifdef DSPMBYTE
 354             if (Ismbyte1(c) && *patnext != EOS)
 355             {
 356               *bufnext++ = (Char) c;
 357               *bufnext++ = (Char) *patnext++;
 358             }
 359             else
 360 #endif /* DSPMBYTE */
 361             if (c == QUOTE) {
 362                 if ((c = *patnext++) == EOS) {
 363                     c = QUOTE;
 364                     --patnext;
 365                 }
 366                 *bufnext++ = (Char) (c | M_PROTECT);
 367             }
 368             else
 369                 *bufnext++ = (Char) c;
 370     }
 371     else
 372         while (bufnext < bufend && (c = *patnext++) != EOS)
 373             *bufnext++ = (Char) c;
 374     *bufnext = EOS;
 375
 376     bufnext = patbuf;
 377     qpatnext = patbuf;
 378     /* we don't need to check for buffer overflow any more */
 379     while ((c = *qpatnext++) != EOS) {
 380 #ifdef DSPMBYTE
 381         if (Ismbyte1(c) && *qpatnext != EOS)
 382         {
 383           *bufnext++ = CHAR(c);
 384           *bufnext++ = CHAR(*qpatnext++);
 385         }
 386         else
 387 #endif /* DSPMBYTE */
 388         switch (c) {
 389         case LBRACKET:
 390             c = *qpatnext;
 391             if (c == not)
 392                 ++qpatnext;
 393             if (*qpatnext == EOS ||
 394                 Strchr(qpatnext + 1, RBRACKET) == NULL) {
 395                 *bufnext++ = LBRACKET;
 396                 if (c == not)
 397                     --qpatnext;
 398                 break;
 399             }
 400             pglob->gl_flags |= GLOB_MAGCHAR;
 401             *bufnext++ = M_SET;
 402             if (c == not)
 403                 *bufnext++ = m_not;
 404             c = *qpatnext++;
 405             do {
 406                 *bufnext++ = CHAR(c);
 407                 if (*qpatnext == RANGE &&
 408                     (c = qpatnext[1]) != RBRACKET) {
 409                     *bufnext++ = M_RNG;
 410                     *bufnext++ = CHAR(c);
 411                     qpatnext += 2;
 412                 }
 413             } while ((c = *qpatnext++) != RBRACKET);
 414             *bufnext++ = M_END;
 415             break;
 416         case QUESTION:
 417             pglob->gl_flags |= GLOB_MAGCHAR;
 418             *bufnext++ = M_ONE;
 419             break;
 420         case STAR:
 421             pglob->gl_flags |= GLOB_MAGCHAR;
 422             /* collapse adjacent stars to one, to avoid
 423              * exponential behavior
 424              */
 425             if (bufnext == patbuf || bufnext[-1] != M_ALL)
 426                 *bufnext++ = M_ALL;
 427             break;
 428         default:
 429             *bufnext++ = CHAR(c);
 430             break;
 431         }
 432     }
 433     *bufnext = EOS;
 434 #ifdef DEBUG
 435     qprintf(patbuf);
 436 #endif
 437
 438     if ((err = glob1(patbuf, pglob, no_match)) != 0)
 439         return (err);
 440
 441     /*
 442      * If there was no match we are going to append the pattern
 443      * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
 444      * and the pattern did not contain any magic characters
 445      * GLOB_NOMAGIC is there just for compatibility with csh.
 446      */
 447     if (pglob->gl_pathc == oldpathc &&
 448         ((flags & GLOB_NOCHECK) ||
 449          ((flags & GLOB_NOMAGIC) && !(pglob->gl_flags & GLOB_MAGCHAR)))) {
 450         if (!(flags & GLOB_QUOTE)) {
 451             Char *dp = compilebuf;
 452             const unsigned char *sp = compilepat;
 453
 454             while ((*dp++ = *sp++) != '\0')
 455                 continue;
 456         }
 457         else {
 458             /*
 459              * copy pattern, interpreting quotes; this is slightly different
 460              * than the interpretation of quotes above -- which should prevail?
 461              */
 462             while (*compilepat != EOS) {
 463                 if (*compilepat == QUOTE) {
 464                     if (*++compilepat == EOS)
 465                         --compilepat;
 466                 }
 467                 *compilebuf++ = (unsigned char) *compilepat++;
 468             }
 469             *compilebuf = EOS;
 470         }
 471         return (globextend(patbuf, pglob));
 472     }
 473     else if (!(flags & GLOB_NOSORT) && (pglob->gl_pathc != oldpathc))
 474         qsort((char *) (pglob->gl_pathv + pglob->gl_offs + oldpathc),
 475               pglob->gl_pathc - oldpathc, sizeof(char *),
 476               (int (*) __P((const void *, const void *))) compare);
 477     return (0);
 478 }
 479
 480 static int
 481 glob1(pattern, pglob, no_match)
 482     Char *pattern;
 483     glob_t *pglob;
 484     int     no_match;
 485 {
 486     Char pathbuf[GLOBBUFLEN + 1];
 487
 488     /*
 489      * a null pathname is invalid -- POSIX 1003.1 sect. 2.4.
 490      */
 491     if (*pattern == EOS)
 492         return (0);
 493     return (glob2(pathbuf, pathbuf, pattern, pglob, no_match));
 494 }
 495
 496 /*
 497  * functions glob2 and glob3 are mutually recursive; there is one level
 498  * of recursion for each segment in the pattern that contains one or
 499  * more meta characters.
 500  */
 501 static int
 502 glob2(pathbuf, pathend, pattern, pglob, no_match)
 503     Char *pathbuf, *pathend, *pattern;
 504     glob_t *pglob;
 505     int     no_match;
 506 {
 507     struct stat sbuf;
 508     int anymeta;
 509     Char *p, *q;
 510
 511     /*
 512      * loop over pattern segments until end of pattern or until segment with
 513      * meta character found.
 514      */
 515     anymeta = 0;
 516     for (;;) {
 517         if (*pattern == EOS) {  /* end of pattern? */
 518             *pathend = EOS;
 519
 520             if (Lstat(pathbuf, &sbuf))
 521                 return (0);
 522
 523             if (((pglob->gl_flags & GLOB_MARK) &&
 524                  pathend[-1] != SEP) &&
 525                 (S_ISDIR(sbuf.st_mode)
 526 #ifdef S_IFLNK
 527                  || (S_ISLNK(sbuf.st_mode) &&
 528                      (Stat(pathbuf, &sbuf) == 0) &&
 529                      S_ISDIR(sbuf.st_mode))
 530 #endif
 531                  )) {
 532                 *pathend++ = SEP;
 533                 *pathend = EOS;
 534             }
 535             ++pglob->gl_matchc;
 536             return (globextend(pathbuf, pglob));
 537         }
 538
 539         /* find end of next segment, copy tentatively to pathend */
 540         q = pathend;
 541         p = pattern;
 542         while (*p != EOS && *p != SEP) {
 543             if (ismeta(*p))
 544                 anymeta = 1;
 545             *q++ = *p++;
 546         }
 547
 548         if (!anymeta) {         /* no expansion, do next segment */
 549             pathend = q;
 550             pattern = p;
 551             while (*pattern == SEP)
 552                 *pathend++ = *pattern++;
 553         }
 554         else                    /* need expansion, recurse */
 555             return (glob3(pathbuf, pathend, pattern, p, pglob, no_match));
 556     }
 557     /* NOTREACHED */
 558 }
 559
 560
 561 static int
 562 glob3(pathbuf, pathend, pattern, restpattern, pglob, no_match)
 563     Char *pathbuf, *pathend, *pattern, *restpattern;
 564     glob_t *pglob;
 565     int     no_match;
 566 {
 567     DIR    *dirp;
 568     struct dirent *dp;
 569     int     err;
 570     Char m_not = (pglob->gl_flags & GLOB_ALTNOT) ? M_ALTNOT : M_NOT;
 571     char cpathbuf[GLOBBUFLEN], *ptr;;
 572
 573     *pathend = EOS;
 574     errno = 0;
 575
 576     if (!(dirp = Opendir(pathbuf))) {
 577         /* todo: don't call for ENOENT or ENOTDIR? */
 578         for (ptr = cpathbuf; (*ptr++ = (char) *pathbuf++) != EOS;)
 579             continue;
 580         if ((pglob->gl_errfunc && (*pglob->gl_errfunc) (cpathbuf, errno)) ||
 581             (pglob->gl_flags & GLOB_ERR))
 582             return (GLOB_ABEND);
 583         else
 584             return (0);
 585     }
 586
 587     err = 0;
 588
 589     /* search directory for matching names */
 590     while ((dp = readdir(dirp)) != NULL) {
 591         register unsigned char *sc;
 592         register Char *dc;
 593
 594         /* initial DOT must be matched literally */
 595         if (dp->d_name[0] == DOT && *pattern != DOT)
 596             continue;
 597         for (sc = (unsigned char *) dp->d_name, dc = pathend;
 598              (*dc++ = *sc++) != '\0';)
 599             continue;
 600         if (match(pathend, pattern, restpattern, (int) m_not) == no_match) {
 601             *pathend = EOS;
 602             continue;
 603         }
 604         err = glob2(pathbuf, --dc, restpattern, pglob, no_match);
 605         if (err)
 606             break;
 607     }
 608     /* todo: check error from readdir? */
 609     (void) closedir(dirp);
 610     return (err);
 611 }
 612
 613
 614 /*
 615  * Extend the gl_pathv member of a glob_t structure to accomodate a new item,
 616  * add the new item, and update gl_pathc.
 617  *
 618  * This assumes the BSD realloc, which only copies the block when its size
 619  * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
 620  * behavior.
 621  *
 622  * Return 0 if new item added, error code if memory couldn't be allocated.
 623  *
 624  * Invariant of the glob_t structure:
 625  *      Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
 626  *       gl_pathv points to (gl_offs + gl_pathc + 1) items.
 627  */
 628 static int
 629 globextend(path, pglob)
 630     Char *path;
 631     glob_t *pglob;
 632 {
 633     register char **pathv;
 634     register int i;
 635     unsigned int newsize;
 636     char   *copy;
 637     Char *p;
 638
 639     newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
 640     pathv = (char **) (pglob->gl_pathv ?
 641                        xrealloc((ptr_t) pglob->gl_pathv, (size_t) newsize) :
 642                        xmalloc((size_t) newsize));
 643     if (pathv == NULL)
 644         return (GLOB_NOSPACE);
 645
 646     if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
 647         /* first time around -- clear initial gl_offs items */
 648         pathv += pglob->gl_offs;
 649         for (i = pglob->gl_offs; --i >= 0;)
 650             *--pathv = NULL;
 651     }
 652     pglob->gl_pathv = pathv;
 653
 654     for (p = path; *p++;)
 655         continue;
 656     if ((copy = (char *) xmalloc((size_t) (p - path))) != NULL) {
 657         register char *dc = copy;
 658         register Char *sc = path;
 659
 660         while ((*dc++ = *sc++) != '\0')
 661             continue;
 662         pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
 663     }
 664     pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
 665     return ((copy == NULL) ? GLOB_NOSPACE : 0);
 666 }
 667
 668
 669 /*
 670  * pattern matching function for filenames.  Each occurrence of the *
 671  * pattern causes a recursion level.
 672  */
 673 static  int
 674 match(name, pat, patend, m_not)
 675     register Char *name, *pat, *patend;
 676     int m_not;
 677 {
 678     int ok, negate_range;
 679     Char c, k;
 680
 681     while (pat < patend) {
 682         c = *pat++;
 683         switch (c & M_MASK) {
 684         case M_ALL:
 685             if (pat == patend)
 686                 return (1);
 687             do
 688                 if (match(name, pat, patend, m_not))
 689                     return (1);
 690             while (*name++ != EOS);
 691             return (0);
 692         case M_ONE:
 693             if (*name++ == EOS)
 694                 return (0);
 695             break;
 696         case M_SET:
 697             ok = 0;
 698             if ((k = *name++) == EOS)
 699                 return (0);
 700             if ((negate_range = ((*pat & M_MASK) == m_not)) != 0)
 701                 ++pat;
 702             while (((c = *pat++) & M_MASK) != M_END) {
 703                 if ((*pat & M_MASK) == M_RNG) {
 704                     if (globcharcoll(CHAR(c), CHAR(k)) <= 0 &&
 705                         globcharcoll(CHAR(k), CHAR(pat[1])) <= 0)
 706                         ok = 1;
 707                     pat += 2;
 708                 }
 709                 else if (c == k)
 710                     ok = 1;
 711             }
 712             if (ok == negate_range)
 713                 return (0);
 714             break;
 715         default:
 716             k = *name++;
 717             if (samecase(k) != samecase(c))
 718                 return (0);
 719             break;
 720         }
 721     }
 722     return (*name == EOS);
 723 }
 724
 725 /* free allocated data belonging to a glob_t structure */
 726 void
 727 globfree(pglob)
 728     glob_t *pglob;
 729 {
 730     register int i;
 731     register char **pp;
 732
 733     if (pglob->gl_pathv != NULL) {
 734         pp = pglob->gl_pathv + pglob->gl_offs;
 735         for (i = pglob->gl_pathc; i--; ++pp)
 736             if (*pp)
 737                 xfree((ptr_t) *pp), *pp = NULL;
 738         xfree((ptr_t) pglob->gl_pathv), pglob->gl_pathv = NULL;
 739     }
 740 }