CMakeLua/Utilities/cmtar/compat/glob.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *  The Regents of the University of California.  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. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *  This product includes software developed by the University of
  19  *  California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #if defined(LIBC_SCCS) && !defined(lint)
  38 #if 0
  39 static char sccsid[] = "@(#)glob.c  8.3 (Berkeley) 10/13/93";
  40 #else
  41 static char rcsid[] = "$OpenBSD: glob.c,v 1.8 1998/08/14 21:39:30 deraadt Exp $";
  42 #endif
  43 #endif /* LIBC_SCCS and not lint */
  44
  45 /*
  46  * glob(3) -- a superset of the one defined in POSIX 1003.2.
  47  *
  48  * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
  49  *
  50  * Optional extra services, controlled by flags not defined by POSIX:
  51  *
  52  * GLOB_QUOTE:
  53  *  Escaping convention: \ inhibits any special meaning the following
  54  *  character might have (except \ at end of string is retained).
  55  * GLOB_MAGCHAR:
  56  *  Set in gl_flags if pattern contained a globbing character.
  57  * GLOB_NOMAGIC:
  58  *  Same as GLOB_NOCHECK, but it will only append pattern if it did
  59  *  not contain any magic characters.  [Used in csh style globbing]
  60  * GLOB_ALTDIRFUNC:
  61  *  Use alternately specified directory access functions.
  62  * GLOB_TILDE:
  63  *  expand ~user/foo to the /home/dir/of/user/foo
  64  * GLOB_BRACE:
  65  *  expand {1,2}{a,b} to 1a 1b 2a 2b
  66  * gl_matchc:
  67  *  Number of matches in the current invocation of glob.
  68  */
  69
  70 #include <config.h>
  71
  72 //#include <sys/param.h>
  73 #include <compat.h>
  74 #include <sys/stat.h>
  75
  76 //#include <dirent.h>
  77 #include <errno.h>
  78 #include <pwd.h>
  79 #include <stdio.h>
  80
  81 #ifdef STDC_HEADERS
  82 # include <stdlib.h>
  83 # include <string.h>
  84 #endif
  85
  86 #ifdef HAVE_UNISTD_H
  87 # include <unistd.h>
  88 #endif
  89
  90 #include <compat.h>
  91
  92
  93 #define  DOLLAR    '$'
  94 #define  DOT    '.'
  95 #define  EOS    '\0'
  96 #define  LBRACKET  '['
  97 #define  NOT    '!'
  98 #define  QUESTION  '?'
  99 #define  QUOTE    '\\'
 100 #define  RANGE    '-'
 101 #define  RBRACKET  ']'
 102 #define  SEP    '/'
 103 #define  STAR    '*'
 104 #define  TILDE    '~'
 105 #define  UNDERSCORE  '_'
 106 #define  LBRACE    '{'
 107 #define  RBRACE    '}'
 108 #define  SLASH    '/'
 109 #define  COMMA    ','
 110
 111 #ifndef DEBUG
 112
 113 #define  M_QUOTE    0x8000
 114 #define  M_PROTECT  0x4000
 115 #define  M_MASK    0xffff
 116 #define  M_ASCII    0x00ff
 117
 118 typedef u_short Char;
 119
 120 #else
 121
 122 #define  M_QUOTE    0x80
 123 #define  M_PROTECT  0x40
 124 #define  M_MASK    0xff
 125 #define  M_ASCII    0x7f
 126
 127 typedef char Char;
 128
 129 #endif
 130
 131
 132 #define  CHAR(c)    ((Char)((c)&M_ASCII))
 133 #define  META(c)    ((Char)((c)|M_QUOTE))
 134 #define  M_ALL    META('*')
 135 #define  M_END    META(']')
 136 #define  M_NOT    META('!')
 137 #define  M_ONE    META('?')
 138 #define  M_RNG    META('-')
 139 #define  M_SET    META('[')
 140 #define  ismeta(c)  (((c)&M_QUOTE) != 0)
 141
 142
 143 static int   compare (const void *, const void *);
 144 static void   g_Ctoc (const Char *, char *);
 145 static int   g_lstat (Char *, struct stat *, glob_t *);
 146 static DIR  *g_opendir (Char *, glob_t *);
 147 static Char  *g_strchr (Char *, int);
 148 #ifdef notdef
 149 static Char  *g_strcat (Char *, const Char *);
 150 #endif
 151 static int   g_stat (Char *, struct stat *, glob_t *);
 152 static int   glob0 (const Char *, glob_t *);
 153 static int   glob1 (Char *, glob_t *);
 154 static int   glob2 (Char *, Char *, Char *, glob_t *);
 155 static int   glob3 (Char *, Char *, Char *, Char *, glob_t *);
 156 static int   globextend (const Char *, glob_t *);
 157 static const Char *  globtilde (const Char *, Char *, size_t, glob_t *);
 158 static int   globexp1 (const Char *, glob_t *);
 159 static int   globexp2 (const Char *, const Char *, glob_t *, int *);
 160 static int   match (Char *, Char *, Char *);
 161 #ifdef DEBUG
 162 static void   qprintf (const char *, Char *);
 163 #endif
 164
 165 int
 166 openbsd_glob(pattern, flags, errfunc, pglob)
 167   const char *pattern;
 168   int flags, (*errfunc) __P((const char *, int));
 169   glob_t *pglob;
 170 {
 171   const u_char *patnext;
 172   int c;
 173   Char *bufnext, *bufend, patbuf[MAXPATHLEN+1];
 174
 175   patnext = (u_char *) pattern;
 176   if (!(flags & GLOB_APPEND)) {
 177     pglob->gl_pathc = 0;
 178     pglob->gl_pathv = NULL;
 179     if (!(flags & GLOB_DOOFFS))
 180       pglob->gl_offs = 0;
 181   }
 182   pglob->gl_flags = flags & ~GLOB_MAGCHAR;
 183   pglob->gl_errfunc = errfunc;
 184   pglob->gl_matchc = 0;
 185
 186   bufnext = patbuf;
 187   bufend = bufnext + MAXPATHLEN;
 188   if (flags & GLOB_NOESCAPE)
 189       while (bufnext < bufend && (c = *patnext++) != EOS)
 190         *bufnext++ = c;
 191   else {
 192     /* Protect the quoted characters. */
 193     while (bufnext < bufend && (c = *patnext++) != EOS)
 194       if (c == QUOTE) {
 195         if ((c = *patnext++) == EOS) {
 196           c = QUOTE;
 197           --patnext;
 198         }
 199         *bufnext++ = c | M_PROTECT;
 200       }
 201       else
 202         *bufnext++ = c;
 203   }
 204   *bufnext = EOS;
 205
 206   if (flags & GLOB_BRACE)
 207     return globexp1(patbuf, pglob);
 208   else
 209     return glob0(patbuf, pglob);
 210 }
 211
 212 /*
 213  * Expand recursively a glob {} pattern. When there is no more expansion
 214  * invoke the standard globbing routine to glob the rest of the magic
 215  * characters
 216  */
 217 static int globexp1(pattern, pglob)
 218   const Char *pattern;
 219   glob_t *pglob;
 220 {
 221   const Char* ptr = pattern;
 222   int rv;
 223
 224   /* Protect a single {}, for find(1), like csh */
 225   if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
 226     return glob0(pattern, pglob);
 227
 228   while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL)
 229     if (!globexp2(ptr, pattern, pglob, &rv))
 230       return rv;
 231
 232   return glob0(pattern, pglob);
 233 }
 234
 235
 236 /*
 237  * Recursive brace globbing helper. Tries to expand a single brace.
 238  * If it succeeds then it invokes globexp1 with the new pattern.
 239  * If it fails then it tries to glob the rest of the pattern and returns.
 240  */
 241 static int globexp2(ptr, pattern, pglob, rv)
 242   const Char *ptr, *pattern;
 243   glob_t *pglob;
 244   int *rv;
 245 {
 246   int     i;
 247   Char   *lm, *ls;
 248   const Char *pe, *pm, *pl;
 249   Char    patbuf[MAXPATHLEN + 1];
 250
 251   /* copy part up to the brace */
 252   for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
 253     continue;
 254   ls = lm;
 255
 256   /* Find the balanced brace */
 257   for (i = 0, pe = ++ptr; *pe; pe++)
 258     if (*pe == LBRACKET) {
 259       /* Ignore everything between [] */
 260       for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
 261         continue;
 262       if (*pe == EOS) {
 263         /*
 264          * We could not find a matching RBRACKET.
 265          * Ignore and just look for RBRACE
 266          */
 267         pe = pm;
 268       }
 269     }
 270     else if (*pe == LBRACE)
 271       i++;
 272     else if (*pe == RBRACE) {
 273       if (i == 0)
 274         break;
 275       i--;
 276     }
 277
 278   /* Non matching braces; just glob the pattern */
 279   if (i != 0 || *pe == EOS) {
 280     *rv = glob0(patbuf, pglob);
 281     return 0;
 282   }
 283
 284   for (i = 0, pl = pm = ptr; pm <= pe; pm++)
 285     switch (*pm) {
 286     case LBRACKET:
 287       /* Ignore everything between [] */
 288       for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
 289         continue;
 290       if (*pm == EOS) {
 291         /*
 292          * We could not find a matching RBRACKET.
 293          * Ignore and just look for RBRACE
 294          */
 295         pm = pl;
 296       }
 297       break;
 298
 299     case LBRACE:
 300       i++;
 301       break;
 302
 303     case RBRACE:
 304       if (i) {
 305           i--;
 306           break;
 307       }
 308       /* FALLTHROUGH */
 309     case COMMA:
 310       if (i && *pm == COMMA)
 311         break;
 312       else {
 313         /* Append the current string */
 314         for (lm = ls; (pl < pm); *lm++ = *pl++)
 315           continue;
 316         /*
 317          * Append the rest of the pattern after the
 318          * closing brace
 319          */
 320         for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
 321           continue;
 322
 323         /* Expand the current pattern */
 324 #ifdef DEBUG
 325         qprintf("globexp2:", patbuf);
 326 #endif
 327         *rv = globexp1(patbuf, pglob);
 328
 329         /* move after the comma, to the next string */
 330         pl = pm + 1;
 331       }
 332       break;
 333
 334     default:
 335       break;
 336     }
 337   *rv = 0;
 338   return 0;
 339 }
 340
 341
 342
 343 /*
 344  * expand tilde from the passwd file.
 345  */
 346 static const Char *
 347 globtilde(pattern, patbuf, patbuf_len, pglob)
 348   const Char *pattern;
 349   Char *patbuf;
 350   size_t patbuf_len;
 351   glob_t *pglob;
 352 {
 353   struct passwd *pwd;
 354   char *h;
 355   const Char *p;
 356   Char *b, *eb;
 357
 358   if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
 359     return pattern;
 360
 361   /* Copy up to the end of the string or / */
 362   eb = &patbuf[patbuf_len - 1];
 363   for (p = pattern + 1, h = (char *) patbuf;
 364       h < (char *)eb && *p && *p != SLASH; *h++ = *p++)
 365     continue;
 366
 367   *h = EOS;
 368
 369   if (((char *) patbuf)[0] == EOS) {
 370     /*
 371      * handle a plain ~ or ~/ by expanding $HOME
 372      * first and then trying the password file
 373      */
 374 #ifdef HAVE_ISSETUGID
 375     if (issetugid() != 0 || (h = getenv("HOME")) == NULL) {
 376 #endif
 377       if ((pwd = getpwuid(getuid())) == NULL)
 378         return pattern;
 379       else
 380         h = pwd->pw_dir;
 381 #ifdef HAVE_ISSETUGID
 382     }
 383 #endif
 384   }
 385   else {
 386     /*
 387      * Expand a ~user
 388      */
 389     if ((pwd = getpwnam((char*) patbuf)) == NULL)
 390       return pattern;
 391     else
 392       h = pwd->pw_dir;
 393   }
 394
 395   /* Copy the home directory */
 396   for (b = patbuf; b < eb && *h; *b++ = *h++)
 397     continue;
 398
 399   /* Append the rest of the pattern */
 400   while (b < eb && (*b++ = *p++) != EOS)
 401     continue;
 402   *b = EOS;
 403
 404   return patbuf;
 405 }
 406
 407
 408 /*
 409  * The main glob() routine: compiles the pattern (optionally processing
 410  * quotes), calls glob1() to do the real pattern matching, and finally
 411  * sorts the list (unless unsorted operation is requested).  Returns 0
 412  * if things went well, nonzero if errors occurred.  It is not an error
 413  * to find no matches.
 414  */
 415 static int
 416 glob0(pattern, pglob)
 417   const Char *pattern;
 418   glob_t *pglob;
 419 {
 420   const Char *qpatnext;
 421   int c, err, oldpathc;
 422   Char *bufnext, patbuf[MAXPATHLEN+1];
 423
 424   qpatnext = globtilde(pattern, patbuf, sizeof(patbuf) / sizeof(Char),
 425       pglob);
 426   oldpathc = pglob->gl_pathc;
 427   bufnext = patbuf;
 428
 429   /* We don't need to check for buffer overflow any more. */
 430   while ((c = *qpatnext++) != EOS) {
 431     switch (c) {
 432     case LBRACKET:
 433       c = *qpatnext;
 434       if (c == NOT)
 435         ++qpatnext;
 436       if (*qpatnext == EOS ||
 437           g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) {
 438         *bufnext++ = LBRACKET;
 439         if (c == NOT)
 440           --qpatnext;
 441         break;
 442       }
 443       *bufnext++ = M_SET;
 444       if (c == NOT)
 445         *bufnext++ = M_NOT;
 446       c = *qpatnext++;
 447       do {
 448         *bufnext++ = CHAR(c);
 449         if (*qpatnext == RANGE &&
 450             (c = qpatnext[1]) != RBRACKET) {
 451           *bufnext++ = M_RNG;
 452           *bufnext++ = CHAR(c);
 453           qpatnext += 2;
 454         }
 455       } while ((c = *qpatnext++) != RBRACKET);
 456       pglob->gl_flags |= GLOB_MAGCHAR;
 457       *bufnext++ = M_END;
 458       break;
 459     case QUESTION:
 460       pglob->gl_flags |= GLOB_MAGCHAR;
 461       *bufnext++ = M_ONE;
 462       break;
 463     case STAR:
 464       pglob->gl_flags |= GLOB_MAGCHAR;
 465       /* collapse adjacent stars to one,
 466        * to avoid exponential behavior
 467        */
 468       if (bufnext == patbuf || bufnext[-1] != M_ALL)
 469           *bufnext++ = M_ALL;
 470       break;
 471     default:
 472       *bufnext++ = CHAR(c);
 473       break;
 474     }
 475   }
 476   *bufnext = EOS;
 477 #ifdef DEBUG
 478   qprintf("glob0:", patbuf);
 479 #endif
 480
 481   if ((err = glob1(patbuf, pglob)) != 0)
 482     return(err);
 483
 484   /*
 485    * If there was no match we are going to append the pattern
 486    * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
 487    * and the pattern did not contain any magic characters
 488    * GLOB_NOMAGIC is there just for compatibility with csh.
 489    */
 490   if (pglob->gl_pathc == oldpathc) {
 491     if ((pglob->gl_flags & GLOB_NOCHECK) ||
 492         ((pglob->gl_flags & GLOB_NOMAGIC) &&
 493         !(pglob->gl_flags & GLOB_MAGCHAR)))
 494       return(globextend(pattern, pglob));
 495     else
 496       return(GLOB_NOMATCH);
 497   }
 498   if (!(pglob->gl_flags & GLOB_NOSORT))
 499     qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
 500         pglob->gl_pathc - oldpathc, sizeof(char *), compare);
 501   return(0);
 502 }
 503
 504 static int
 505 compare(p, q)
 506   const void *p, *q;
 507 {
 508   return(strcmp(*(char **)p, *(char **)q));
 509 }
 510
 511 static int
 512 glob1(pattern, pglob)
 513   Char *pattern;
 514   glob_t *pglob;
 515 {
 516   Char pathbuf[MAXPATHLEN+1];
 517
 518   /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
 519   if (*pattern == EOS)
 520     return(0);
 521   return(glob2(pathbuf, pathbuf, pattern, pglob));
 522 }
 523
 524 /*
 525  * The functions glob2 and glob3 are mutually recursive; there is one level
 526  * of recursion for each segment in the pattern that contains one or more
 527  * meta characters.
 528  */
 529 static int
 530 glob2(pathbuf, pathend, pattern, pglob)
 531   Char *pathbuf, *pathend, *pattern;
 532   glob_t *pglob;
 533 {
 534   struct stat sb;
 535   Char *p, *q;
 536   int anymeta;
 537
 538   /*
 539    * Loop over pattern segments until end of pattern or until
 540    * segment with meta character found.
 541    */
 542   for (anymeta = 0;;) {
 543     if (*pattern == EOS) {    /* End of pattern? */
 544       *pathend = EOS;
 545       if (g_lstat(pathbuf, &sb, pglob))
 546         return(0);
 547
 548       if (((pglob->gl_flags & GLOB_MARK) &&
 549           pathend[-1] != SEP) && (S_ISDIR(sb.st_mode)
 550           || (S_ISLNK(sb.st_mode) &&
 551           (g_stat(pathbuf, &sb, pglob) == 0) &&
 552           S_ISDIR(sb.st_mode)))) {
 553         *pathend++ = SEP;
 554         *pathend = EOS;
 555       }
 556       ++pglob->gl_matchc;
 557       return(globextend(pathbuf, pglob));
 558     }
 559
 560     /* Find end of next segment, copy tentatively to pathend. */
 561     q = pathend;
 562     p = pattern;
 563     while (*p != EOS && *p != SEP) {
 564       if (ismeta(*p))
 565         anymeta = 1;
 566       *q++ = *p++;
 567     }
 568
 569     if (!anymeta) {    /* No expansion, do next segment. */
 570       pathend = q;
 571       pattern = p;
 572       while (*pattern == SEP)
 573         *pathend++ = *pattern++;
 574     } else      /* Need expansion, recurse. */
 575       return(glob3(pathbuf, pathend, pattern, p, pglob));
 576   }
 577   /* NOTREACHED */
 578 }
 579
 580 static int
 581 glob3(pathbuf, pathend, pattern, restpattern, pglob)
 582   Char *pathbuf, *pathend, *pattern, *restpattern;
 583   glob_t *pglob;
 584 {
 585   register struct dirent *dp;
 586   DIR *dirp;
 587   int err;
 588   char buf[MAXPATHLEN];
 589
 590   /*
 591    * The readdirfunc declaration can't be prototyped, because it is
 592    * assigned, below, to two functions which are prototyped in glob.h
 593    * and dirent.h as taking pointers to differently typed opaque
 594    * structures.
 595    */
 596   struct dirent *(*readdirfunc)();
 597
 598   *pathend = EOS;
 599   errno = 0;
 600
 601   if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
 602     /* TODO: don't call for ENOENT or ENOTDIR? */
 603     if (pglob->gl_errfunc) {
 604       g_Ctoc(pathbuf, buf);
 605       if (pglob->gl_errfunc(buf, errno) ||
 606           pglob->gl_flags & GLOB_ERR)
 607         return (GLOB_ABORTED);
 608     }
 609     return(0);
 610   }
 611
 612   err = 0;
 613
 614   /* Search directory for matching names. */
 615   if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 616     readdirfunc = pglob->gl_readdir;
 617   else
 618     readdirfunc = readdir;
 619   while ((dp = (*readdirfunc)(dirp))) {
 620     register u_char *sc;
 621     register Char *dc;
 622
 623     /* Initial DOT must be matched literally. */
 624     if (dp->d_name[0] == DOT && *pattern != DOT)
 625       continue;
 626     for (sc = (u_char *) dp->d_name, dc = pathend;
 627          (*dc++ = *sc++) != EOS;)
 628       continue;
 629     if (!match(pathend, pattern, restpattern)) {
 630       *pathend = EOS;
 631       continue;
 632     }
 633     err = glob2(pathbuf, --dc, restpattern, pglob);
 634     if (err)
 635       break;
 636   }
 637
 638   if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 639     (*pglob->gl_closedir)(dirp);
 640   else
 641     closedir(dirp);
 642   return(err);
 643 }
 644
 645
 646 /*
 647  * Extend the gl_pathv member of a glob_t structure to accomodate a new item,
 648  * add the new item, and update gl_pathc.
 649  *
 650  * This assumes the BSD realloc, which only copies the block when its size
 651  * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
 652  * behavior.
 653  *
 654  * Return 0 if new item added, error code if memory couldn't be allocated.
 655  *
 656  * Invariant of the glob_t structure:
 657  *  Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
 658  *  gl_pathv points to (gl_offs + gl_pathc + 1) items.
 659  */
 660 static int
 661 globextend(path, pglob)
 662   const Char *path;
 663   glob_t *pglob;
 664 {
 665   register char **pathv;
 666   register int i;
 667   u_int newsize;
 668   char *copy;
 669   const Char *p;
 670
 671   newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
 672   pathv = pglob->gl_pathv ?
 673         realloc((char *)pglob->gl_pathv, newsize) :
 674         malloc(newsize);
 675   if (pathv == NULL) {
 676     if (pglob->gl_pathv)
 677       free(pglob->gl_pathv);
 678     return(GLOB_NOSPACE);
 679   }
 680
 681   if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
 682     /* first time around -- clear initial gl_offs items */
 683     pathv += pglob->gl_offs;
 684     for (i = pglob->gl_offs; --i >= 0; )
 685       *--pathv = NULL;
 686   }
 687   pglob->gl_pathv = pathv;
 688
 689   for (p = path; *p++;)
 690     continue;
 691   if ((copy = malloc(p - path)) != NULL) {
 692     g_Ctoc(path, copy);
 693     pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
 694   }
 695   pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
 696   return(copy == NULL ? GLOB_NOSPACE : 0);
 697 }
 698
 699
 700 /*
 701  * pattern matching function for filenames.  Each occurrence of the *
 702  * pattern causes a recursion level.
 703  */
 704 static int
 705 match(name, pat, patend)
 706   register Char *name, *pat, *patend;
 707 {
 708   int ok, negate_range;
 709   Char c, k;
 710
 711   while (pat < patend) {
 712     c = *pat++;
 713     switch (c & M_MASK) {
 714     case M_ALL:
 715       if (pat == patend)
 716         return(1);
 717       do
 718           if (match(name, pat, patend))
 719             return(1);
 720       while (*name++ != EOS);
 721       return(0);
 722     case M_ONE:
 723       if (*name++ == EOS)
 724         return(0);
 725       break;
 726     case M_SET:
 727       ok = 0;
 728       if ((k = *name++) == EOS)
 729         return(0);
 730       if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
 731         ++pat;
 732       while (((c = *pat++) & M_MASK) != M_END)
 733         if ((*pat & M_MASK) == M_RNG) {
 734           if (c <= k && k <= pat[1])
 735             ok = 1;
 736           pat += 2;
 737         } else if (c == k)
 738           ok = 1;
 739       if (ok == negate_range)
 740         return(0);
 741       break;
 742     default:
 743       if (*name++ != c)
 744         return(0);
 745       break;
 746     }
 747   }
 748   return(*name == EOS);
 749 }
 750
 751 /* Free allocated data belonging to a glob_t structure. */
 752 void
 753 openbsd_globfree(pglob)
 754   glob_t *pglob;
 755 {
 756   register int i;
 757   register char **pp;
 758
 759   if (pglob->gl_pathv != NULL) {
 760     pp = pglob->gl_pathv + pglob->gl_offs;
 761     for (i = pglob->gl_pathc; i--; ++pp)
 762       if (*pp)
 763         free(*pp);
 764     free(pglob->gl_pathv);
 765   }
 766 }
 767
 768 static DIR *
 769 g_opendir(str, pglob)
 770   register Char *str;
 771   glob_t *pglob;
 772 {
 773   char buf[MAXPATHLEN];
 774
 775   if (!*str)
 776     strcpy(buf, ".");
 777   else
 778     g_Ctoc(str, buf);
 779
 780   if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 781     return((*pglob->gl_opendir)(buf));
 782
 783   return(opendir(buf));
 784 }
 785
 786 static int
 787 g_lstat(fn, sb, pglob)
 788   register Char *fn;
 789   struct stat *sb;
 790   glob_t *pglob;
 791 {
 792   char buf[MAXPATHLEN];
 793
 794   g_Ctoc(fn, buf);
 795   if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 796     return((*pglob->gl_lstat)(buf, sb));
 797   return(lstat(buf, sb));
 798 }
 799
 800 static int
 801 g_stat(fn, sb, pglob)
 802   register Char *fn;
 803   struct stat *sb;
 804   glob_t *pglob;
 805 {
 806   char buf[MAXPATHLEN];
 807
 808   g_Ctoc(fn, buf);
 809   if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 810     return((*pglob->gl_stat)(buf, sb));
 811   return(stat(buf, sb));
 812 }
 813
 814 static Char *
 815 g_strchr(str, ch)
 816   Char *str;
 817   int ch;
 818 {
 819   do {
 820     if (*str == ch)
 821       return (str);
 822   } while (*str++);
 823   return (NULL);
 824 }
 825
 826 #ifdef notdef
 827 static Char *
 828 g_strcat(dst, src)
 829   Char *dst;
 830   const Char* src;
 831 {
 832   Char *sdst = dst;
 833
 834   while (*dst++)
 835     continue;
 836   --dst;
 837   while((*dst++ = *src++) != EOS)
 838       continue;
 839
 840   return (sdst);
 841 }
 842 #endif
 843
 844 static void
 845 g_Ctoc(str, buf)
 846   register const Char *str;
 847   char *buf;
 848 {
 849   register char *dc;
 850
 851   for (dc = buf; (*dc++ = *str++) != EOS;)
 852     continue;
 853 }
 854
 855 #ifdef DEBUG
 856 static void
 857 qprintf(str, s)
 858   const char *str;
 859   register Char *s;
 860 {
 861   register Char *p;
 862
 863   (void)printf("%s:\n", str);
 864   for (p = s; *p; p++)
 865     (void)printf("%c", CHAR(*p));
 866   (void)printf("\n");
 867   for (p = s; *p; p++)
 868     (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
 869   (void)printf("\n");
 870   for (p = s; *p; p++)
 871     (void)printf("%c", ismeta(*p) ? '_' : ' ');
 872   (void)printf("\n");
 873 }
 874 #endif