util.subproj/glob.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved
  26  *
  27  * Copyright (c) 1989, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  *
  30  * This code is derived from software contributed to Berkeley by
  31  * Guido van Rossum.
  32  *
  33  * The NEXTSTEP Software License Agreement specifies the terms
  34  * and conditions for redistribution.
  35  *
  36  *      @(#)glob.c      8.3 (Berkeley) 10/13/93
  37  */
  38
  39
  40 /*
  41  * glob(3) -- a superset of the one defined in POSIX 1003.2.
  42  *
  43  * The [!...] convention to negate a range is supported (SysV, Posix, ksh).
  44  *
  45  * Optional extra services, controlled by flags not defined by POSIX:
  46  *
  47  * GLOB_QUOTE:
  48  *      Escaping convention: \ inhibits any special meaning the following
  49  *      character might have (except \ at end of string is retained).
  50  * GLOB_MAGCHAR:
  51  *      Set in gl_flags if pattern contained a globbing character.
  52  * GLOB_NOMAGIC:
  53  *      Same as GLOB_NOCHECK, but it will only append pattern if it did
  54  *      not contain any magic characters.  [Used in csh style globbing]
  55  * GLOB_ALTDIRFUNC:
  56  *      Use alternately specified directory access functions.
  57  * GLOB_TILDE:
  58  *      expand ~user/foo to the /home/dir/of/user/foo
  59  * GLOB_BRACE:
  60  *      expand {1,2}{a,b} to 1a 1b 2a 2b
  61  * gl_matchc:
  62  *      Number of matches in the current invocation of glob.
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/stat.h>
  67
  68 #include <ctype.h>
  69 #include <dirent.h>
  70 #include <errno.h>
  71 #include <glob.h>
  72 #include <pwd.h>
  73 #include <stdio.h>
  74 #include <stdlib.h>
  75 #include <string.h>
  76 #include <unistd.h>
  77
  78 #define DOLLAR          '$'
  79 #define DOT             '.'
  80 #define EOS             '\0'
  81 #define LBRACKET        '['
  82 #define NOT             '!'
  83 #define QUESTION        '?'
  84 #define QUOTE           '\\'
  85 #define RANGE           '-'
  86 #define RBRACKET        ']'
  87 #define SEP             '/'
  88 #define STAR            '*'
  89 #define TILDE           '~'
  90 #define UNDERSCORE      '_'
  91 #define LBRACE          '{'
  92 #define RBRACE          '}'
  93 #define SLASH           '/'
  94 #define COMMA           ','
  95
  96 #ifndef DEBUG
  97
  98 #define M_QUOTE         0x8000
  99 #define M_PROTECT       0x4000
 100 #define M_MASK          0xffff
 101 #define M_ASCII         0x00ff
 102
 103 typedef u_short Char;
 104
 105 #else
 106
 107 #define M_QUOTE         0x80
 108 #define M_PROTECT       0x40
 109 #define M_MASK          0xff
 110 #define M_ASCII         0x7f
 111
 112 typedef char Char;
 113
 114 #endif
 115
 116
 117 #define CHAR(c)         ((Char)((c)&M_ASCII))
 118 #define META(c)         ((Char)((c)|M_QUOTE))
 119 #define M_ALL           META('*')
 120 #define M_END           META(']')
 121 #define M_NOT           META('!')
 122 #define M_ONE           META('?')
 123 #define M_RNG           META('-')
 124 #define M_SET           META('[')
 125 #define ismeta(c)       (((c)&M_QUOTE) != 0)
 126
 127
 128 static int       compare __P((const void *, const void *));
 129 static void      g_Ctoc __P((const Char *, char *));
 130 static int       g_lstat __P((Char *, struct stat *, glob_t *));
 131 static DIR      *g_opendir __P((Char *, glob_t *));
 132 static Char     *g_strchr __P((Char *, int));
 133 #ifdef notdef
 134 static Char     *g_strcat __P((Char *, const Char *));
 135 #endif
 136 static int       g_stat __P((Char *, struct stat *, glob_t *));
 137 static int       glob0 __P((const Char *, glob_t *));
 138 static int       glob1 __P((Char *, glob_t *));
 139 static int       glob2 __P((Char *, Char *, Char *, glob_t *));
 140 static int       glob3 __P((Char *, Char *, Char *, Char *, glob_t *));
 141 static int       globextend __P((const Char *, glob_t *));
 142 static const Char *      globtilde __P((const Char *, Char *, glob_t *));
 143 static int       globexp1 __P((const Char *, glob_t *));
 144 static int       globexp2 __P((const Char *, const Char *, glob_t *, int *));
 145 static int       match __P((Char *, Char *, Char *));
 146 #ifdef DEBUG
 147 static void      qprintf __P((const char *, Char *));
 148 #endif
 149
 150 int
 151 glob(pattern, flags, errfunc, pglob)
 152         const char *pattern;
 153         int flags, (*errfunc) __P((const char *, int));
 154         glob_t *pglob;
 155 {
 156         const u_char *patnext;
 157         int c;
 158         Char *bufnext, *bufend, patbuf[MAXPATHLEN+1];
 159
 160         patnext = (u_char *) pattern;
 161         if (!(flags & GLOB_APPEND)) {
 162                 pglob->gl_pathc = 0;
 163                 pglob->gl_pathv = NULL;
 164                 if (!(flags & GLOB_DOOFFS))
 165                         pglob->gl_offs = 0;
 166         }
 167         pglob->gl_flags = flags & ~GLOB_MAGCHAR;
 168         pglob->gl_errfunc = errfunc;
 169         pglob->gl_matchc = 0;
 170
 171         bufnext = patbuf;
 172         bufend = bufnext + MAXPATHLEN;
 173         if (flags & GLOB_QUOTE) {
 174                 /* Protect the quoted characters. */
 175                 while (bufnext < bufend && (c = *patnext++) != EOS)
 176                         if (c == QUOTE) {
 177                                 if ((c = *patnext++) == EOS) {
 178                                         c = QUOTE;
 179                                         --patnext;
 180                                 }
 181                                 *bufnext++ = c | M_PROTECT;
 182                         }
 183                         else
 184                                 *bufnext++ = c;
 185         }
 186         else
 187             while (bufnext < bufend && (c = *patnext++) != EOS)
 188                     *bufnext++ = c;
 189         *bufnext = EOS;
 190
 191         if (flags & GLOB_BRACE)
 192             return globexp1(patbuf, pglob);
 193         else
 194             return glob0(patbuf, pglob);
 195 }
 196
 197 /*
 198  * Expand recursively a glob {} pattern. When there is no more expansion
 199  * invoke the standard globbing routine to glob the rest of the magic
 200  * characters
 201  */
 202 static int globexp1(pattern, pglob)
 203         const Char *pattern;
 204         glob_t *pglob;
 205 {
 206         const Char* ptr = pattern;
 207         int rv;
 208
 209         /* Protect a single {}, for find(1), like csh */
 210         if (pattern[0] == LBRACE && pattern[1] == RBRACE && pattern[2] == EOS)
 211                 return glob0(pattern, pglob);
 212
 213         while ((ptr = (const Char *) g_strchr((Char *) ptr, LBRACE)) != NULL)
 214                 if (!globexp2(ptr, pattern, pglob, &rv))
 215                         return rv;
 216
 217         return glob0(pattern, pglob);
 218 }
 219
 220
 221 /*
 222  * Recursive brace globbing helper. Tries to expand a single brace.
 223  * If it succeeds then it invokes globexp1 with the new pattern.
 224  * If it fails then it tries to glob the rest of the pattern and returns.
 225  */
 226 static int globexp2(ptr, pattern, pglob, rv)
 227         const Char *ptr, *pattern;
 228         glob_t *pglob;
 229         int *rv;
 230 {
 231         int     i;
 232         Char   *lm, *ls;
 233         const Char *pe, *pm, *pl;
 234         Char    patbuf[MAXPATHLEN + 1];
 235
 236         /* copy part up to the brace */
 237         for (lm = patbuf, pm = pattern; pm != ptr; *lm++ = *pm++)
 238                 continue;
 239         ls = lm;
 240
 241         /* Find the balanced brace */
 242         for (i = 0, pe = ++ptr; *pe; pe++)
 243                 if (*pe == LBRACKET) {
 244                         /* Ignore everything between [] */
 245                         for (pm = pe++; *pe != RBRACKET && *pe != EOS; pe++)
 246                                 continue;
 247                         if (*pe == EOS) {
 248                                 /*
 249                                  * We could not find a matching RBRACKET.
 250                                  * Ignore and just look for RBRACE
 251                                  */
 252                                 pe = pm;
 253                         }
 254                 }
 255                 else if (*pe == LBRACE)
 256                         i++;
 257                 else if (*pe == RBRACE) {
 258                         if (i == 0)
 259                                 break;
 260                         i--;
 261                 }
 262
 263         /* Non matching braces; just glob the pattern */
 264         if (i != 0 || *pe == EOS) {
 265                 *rv = glob0(patbuf, pglob);
 266                 return 0;
 267         }
 268
 269         for (i = 0, pl = pm = ptr; pm <= pe; pm++)
 270                 switch (*pm) {
 271                 case LBRACKET:
 272                         /* Ignore everything between [] */
 273                         for (pl = pm++; *pm != RBRACKET && *pm != EOS; pm++)
 274                                 continue;
 275                         if (*pm == EOS) {
 276                                 /*
 277                                  * We could not find a matching RBRACKET.
 278                                  * Ignore and just look for RBRACE
 279                                  */
 280                                 pm = pl;
 281                         }
 282                         break;
 283
 284                 case LBRACE:
 285                         i++;
 286                         break;
 287
 288                 case RBRACE:
 289                         if (i) {
 290                             i--;
 291                             break;
 292                         }
 293                         /* FALLTHROUGH */
 294                 case COMMA:
 295                         if (i && *pm == COMMA)
 296                                 break;
 297                         else {
 298                                 /* Append the current string */
 299                                 for (lm = ls; (pl < pm); *lm++ = *pl++)
 300                                         continue;
 301                                 /*
 302                                  * Append the rest of the pattern after the
 303                                  * closing brace
 304                                  */
 305                                 for (pl = pe + 1; (*lm++ = *pl++) != EOS;)
 306                                         continue;
 307
 308                                 /* Expand the current pattern */
 309 #ifdef DEBUG
 310                                 qprintf("globexp2:", patbuf);
 311 #endif
 312                                 *rv = globexp1(patbuf, pglob);
 313
 314                                 /* move after the comma, to the next string */
 315                                 pl = pm + 1;
 316                         }
 317                         break;
 318
 319                 default:
 320                         break;
 321                 }
 322         *rv = 0;
 323         return 0;
 324 }
 325
 326
 327
 328 /*
 329  * expand tilde from the passwd file.
 330  */
 331 static const Char *
 332 globtilde(pattern, patbuf, pglob)
 333         const Char *pattern;
 334         Char *patbuf;
 335         glob_t *pglob;
 336 {
 337         struct passwd *pwd;
 338         char *h;
 339         const Char *p;
 340         Char *b;
 341
 342         if (*pattern != TILDE || !(pglob->gl_flags & GLOB_TILDE))
 343                 return pattern;
 344
 345         /* Copy up to the end of the string or / */
 346         for (p = pattern + 1, h = (char *) patbuf; *p && *p != SLASH;
 347              *h++ = *p++)
 348                 continue;
 349
 350         *h = EOS;
 351
 352         if (((char *) patbuf)[0] == EOS) {
 353                 /*
 354                  * handle a plain ~ or ~/ by expanding $HOME
 355                  * first and then trying the password file
 356                  */
 357                 if ((h = getenv("HOME")) == NULL) {
 358                         if ((pwd = getpwuid(getuid())) == NULL)
 359                                 return pattern;
 360                         else
 361                                 h = pwd->pw_dir;
 362                 }
 363         }
 364         else {
 365                 /*
 366                  * Expand a ~user
 367                  */
 368                 if ((pwd = getpwnam((char*) patbuf)) == NULL)
 369                         return pattern;
 370                 else
 371                         h = pwd->pw_dir;
 372         }
 373
 374         /* Copy the home directory */
 375         for (b = patbuf; *h; *b++ = *h++)
 376                 continue;
 377
 378         /* Append the rest of the pattern */
 379         while ((*b++ = *p++) != EOS)
 380                 continue;
 381
 382         return patbuf;
 383 }
 384
 385
 386 /*
 387  * The main glob() routine: compiles the pattern (optionally processing
 388  * quotes), calls glob1() to do the real pattern matching, and finally
 389  * sorts the list (unless unsorted operation is requested).  Returns 0
 390  * if things went well, nonzero if errors occurred.  It is not an error
 391  * to find no matches.
 392  */
 393 static int
 394 glob0(pattern, pglob)
 395         const Char *pattern;
 396         glob_t *pglob;
 397 {
 398         const Char *qpatnext;
 399         int c, err, oldpathc;
 400         Char *bufnext, patbuf[MAXPATHLEN+1];
 401
 402         qpatnext = globtilde(pattern, patbuf, pglob);
 403         oldpathc = pglob->gl_pathc;
 404         bufnext = patbuf;
 405
 406         /* We don't need to check for buffer overflow any more. */
 407         while ((c = *qpatnext++) != EOS) {
 408                 switch (c) {
 409                 case LBRACKET:
 410                         c = *qpatnext;
 411                         if (c == NOT)
 412                                 ++qpatnext;
 413                         if (*qpatnext == EOS ||
 414                             g_strchr((Char *) qpatnext+1, RBRACKET) == NULL) {
 415                                 *bufnext++ = LBRACKET;
 416                                 if (c == NOT)
 417                                         --qpatnext;
 418                                 break;
 419                         }
 420                         *bufnext++ = M_SET;
 421                         if (c == NOT)
 422                                 *bufnext++ = M_NOT;
 423                         c = *qpatnext++;
 424                         do {
 425                                 *bufnext++ = CHAR(c);
 426                                 if (*qpatnext == RANGE &&
 427                                     (c = qpatnext[1]) != RBRACKET) {
 428                                         *bufnext++ = M_RNG;
 429                                         *bufnext++ = CHAR(c);
 430                                         qpatnext += 2;
 431                                 }
 432                         } while ((c = *qpatnext++) != RBRACKET);
 433                         pglob->gl_flags |= GLOB_MAGCHAR;
 434                         *bufnext++ = M_END;
 435                         break;
 436                 case QUESTION:
 437                         pglob->gl_flags |= GLOB_MAGCHAR;
 438                         *bufnext++ = M_ONE;
 439                         break;
 440                 case STAR:
 441                         pglob->gl_flags |= GLOB_MAGCHAR;
 442                         /* collapse adjacent stars to one,
 443                          * to avoid exponential behavior
 444                          */
 445                         if (bufnext == patbuf || bufnext[-1] != M_ALL)
 446                             *bufnext++ = M_ALL;
 447                         break;
 448                 default:
 449                         *bufnext++ = CHAR(c);
 450                         break;
 451                 }
 452         }
 453         *bufnext = EOS;
 454 #ifdef DEBUG
 455         qprintf("glob0:", patbuf);
 456 #endif
 457
 458         if ((err = glob1(patbuf, pglob)) != 0)
 459                 return(err);
 460
 461         /*
 462          * If there was no match we are going to append the pattern
 463          * if GLOB_NOCHECK was specified or if GLOB_NOMAGIC was specified
 464          * and the pattern did not contain any magic characters
 465          * GLOB_NOMAGIC is there just for compatibility with csh.
 466          */
 467         if (pglob->gl_pathc == oldpathc &&
 468             ((pglob->gl_flags & GLOB_NOCHECK) ||
 469               ((pglob->gl_flags & GLOB_NOMAGIC) &&
 470                !(pglob->gl_flags & GLOB_MAGCHAR))))
 471                 return(globextend(pattern, pglob));
 472         else if (!(pglob->gl_flags & GLOB_NOSORT))
 473                 qsort(pglob->gl_pathv + pglob->gl_offs + oldpathc,
 474                     pglob->gl_pathc - oldpathc, sizeof(char *), compare);
 475         return(0);
 476 }
 477
 478 static int
 479 compare(p, q)
 480         const void *p, *q;
 481 {
 482         return(strcmp(*(char **)p, *(char **)q));
 483 }
 484
 485 static int
 486 glob1(pattern, pglob)
 487         Char *pattern;
 488         glob_t *pglob;
 489 {
 490         Char pathbuf[MAXPATHLEN+1];
 491
 492         /* A null pathname is invalid -- POSIX 1003.1 sect. 2.4. */
 493         if (*pattern == EOS)
 494                 return(0);
 495         return(glob2(pathbuf, pathbuf, pattern, pglob));
 496 }
 497
 498 /*
 499  * The functions glob2 and glob3 are mutually recursive; there is one level
 500  * of recursion for each segment in the pattern that contains one or more
 501  * meta characters.
 502  */
 503 static int
 504 glob2(pathbuf, pathend, pattern, pglob)
 505         Char *pathbuf, *pathend, *pattern;
 506         glob_t *pglob;
 507 {
 508         struct stat sb;
 509         Char *p, *q;
 510         int anymeta;
 511
 512         /*
 513          * Loop over pattern segments until end of pattern or until
 514          * segment with meta character found.
 515          */
 516         for (anymeta = 0;;) {
 517                 if (*pattern == EOS) {          /* End of pattern? */
 518                         *pathend = EOS;
 519                         if (g_lstat(pathbuf, &sb, pglob))
 520                                 return(0);
 521
 522                         if (((pglob->gl_flags & GLOB_MARK) &&
 523                             pathend[-1] != SEP) && (S_ISDIR(sb.st_mode)
 524                             || (S_ISLNK(sb.st_mode) &&
 525                             (g_stat(pathbuf, &sb, pglob) == 0) &&
 526                             S_ISDIR(sb.st_mode)))) {
 527                                 *pathend++ = SEP;
 528                                 *pathend = EOS;
 529                         }
 530                         ++pglob->gl_matchc;
 531                         return(globextend(pathbuf, pglob));
 532                 }
 533
 534                 /* Find end of next segment, copy tentatively to pathend. */
 535                 q = pathend;
 536                 p = pattern;
 537                 while (*p != EOS && *p != SEP) {
 538                         if (ismeta(*p))
 539                                 anymeta = 1;
 540                         *q++ = *p++;
 541                 }
 542
 543                 if (!anymeta) {         /* No expansion, do next segment. */
 544                         pathend = q;
 545                         pattern = p;
 546                         while (*pattern == SEP)
 547                                 *pathend++ = *pattern++;
 548                 } else                  /* Need expansion, recurse. */
 549                         return(glob3(pathbuf, pathend, pattern, p, pglob));
 550         }
 551         /* NOTREACHED */
 552 }
 553
 554 static int
 555 glob3(pathbuf, pathend, pattern, restpattern, pglob)
 556         Char *pathbuf, *pathend, *pattern, *restpattern;
 557         glob_t *pglob;
 558 {
 559         register struct dirent *dp;
 560         DIR *dirp;
 561         int err;
 562         char buf[MAXPATHLEN];
 563
 564         /*
 565          * The readdirfunc declaration can't be prototyped, because it is
 566          * assigned, below, to two functions which are prototyped in glob.h
 567          * and dirent.h as taking pointers to differently typed opaque
 568          * structures.
 569          */
 570         struct dirent *(*readdirfunc)();
 571
 572         *pathend = EOS;
 573         errno = 0;
 574
 575         if ((dirp = g_opendir(pathbuf, pglob)) == NULL) {
 576                 /* TODO: don't call for ENOENT or ENOTDIR? */
 577                 if (pglob->gl_errfunc) {
 578                         g_Ctoc(pathbuf, buf);
 579                         if (pglob->gl_errfunc(buf, errno) ||
 580                             pglob->gl_flags & GLOB_ERR)
 581                                 return (GLOB_ABEND);
 582                 }
 583                 return(0);
 584         }
 585
 586         err = 0;
 587
 588         /* Search directory for matching names. */
 589         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 590                 readdirfunc = pglob->gl_readdir;
 591         else
 592                 readdirfunc = readdir;
 593         while ((dp = (*readdirfunc)(dirp))) {
 594                 register u_char *sc;
 595                 register Char *dc;
 596
 597                 /* Initial DOT must be matched literally. */
 598                 if (dp->d_name[0] == DOT && *pattern != DOT)
 599                         continue;
 600                 for (sc = (u_char *) dp->d_name, dc = pathend;
 601                      (*dc++ = *sc++) != EOS;)
 602                         continue;
 603                 if (!match(pathend, pattern, restpattern)) {
 604                         *pathend = EOS;
 605                         continue;
 606                 }
 607                 err = glob2(pathbuf, --dc, restpattern, pglob);
 608                 if (err)
 609                         break;
 610         }
 611
 612         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 613                 (*pglob->gl_closedir)(dirp);
 614         else
 615                 closedir(dirp);
 616         return(err);
 617 }
 618
 619
 620 /*
 621  * Extend the gl_pathv member of a glob_t structure to accomodate a new item,
 622  * add the new item, and update gl_pathc.
 623  *
 624  * This assumes the BSD realloc, which only copies the block when its size
 625  * crosses a power-of-two boundary; for v7 realloc, this would cause quadratic
 626  * behavior.
 627  *
 628  * Return 0 if new item added, error code if memory couldn't be allocated.
 629  *
 630  * Invariant of the glob_t structure:
 631  *      Either gl_pathc is zero and gl_pathv is NULL; or gl_pathc > 0 and
 632  *      gl_pathv points to (gl_offs + gl_pathc + 1) items.
 633  */
 634 static int
 635 globextend(path, pglob)
 636         const Char *path;
 637         glob_t *pglob;
 638 {
 639         register char **pathv;
 640         register int i;
 641         u_int newsize;
 642         char *copy;
 643         const Char *p;
 644
 645         newsize = sizeof(*pathv) * (2 + pglob->gl_pathc + pglob->gl_offs);
 646         pathv = pglob->gl_pathv ?
 647                     realloc((char *)pglob->gl_pathv, newsize) :
 648                     malloc(newsize);
 649         if (pathv == NULL)
 650                 return(GLOB_NOSPACE);
 651
 652         if (pglob->gl_pathv == NULL && pglob->gl_offs > 0) {
 653                 /* first time around -- clear initial gl_offs items */
 654                 pathv += pglob->gl_offs;
 655                 for (i = pglob->gl_offs; --i >= 0; )
 656                         *--pathv = NULL;
 657         }
 658         pglob->gl_pathv = pathv;
 659
 660         for (p = path; *p++;)
 661                 continue;
 662         if ((copy = malloc(p - path)) != NULL) {
 663                 g_Ctoc(path, copy);
 664                 pathv[pglob->gl_offs + pglob->gl_pathc++] = copy;
 665         }
 666         pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
 667         return(copy == NULL ? GLOB_NOSPACE : 0);
 668 }
 669
 670
 671 /*
 672  * pattern matching function for filenames.  Each occurrence of the *
 673  * pattern causes a recursion level.
 674  */
 675 static int
 676 match(name, pat, patend)
 677         register Char *name, *pat, *patend;
 678 {
 679         int ok, negate_range;
 680         Char c, k;
 681
 682         while (pat < patend) {
 683                 c = *pat++;
 684                 switch (c & M_MASK) {
 685                 case M_ALL:
 686                         if (pat == patend)
 687                                 return(1);
 688                         do
 689                             if (match(name, pat, patend))
 690                                     return(1);
 691                         while (*name++ != EOS);
 692                         return(0);
 693                 case M_ONE:
 694                         if (*name++ == EOS)
 695                                 return(0);
 696                         break;
 697                 case M_SET:
 698                         ok = 0;
 699                         if ((k = *name++) == EOS)
 700                                 return(0);
 701                         if ((negate_range = ((*pat & M_MASK) == M_NOT)) != EOS)
 702                                 ++pat;
 703                         while (((c = *pat++) & M_MASK) != M_END)
 704                                 if ((*pat & M_MASK) == M_RNG) {
 705                                         if (c <= k && k <= pat[1])
 706                                                 ok = 1;
 707                                         pat += 2;
 708                                 } else if (c == k)
 709                                         ok = 1;
 710                         if (ok == negate_range)
 711                                 return(0);
 712                         break;
 713                 default:
 714                         if (*name++ != c)
 715                                 return(0);
 716                         break;
 717                 }
 718         }
 719         return(*name == EOS);
 720 }
 721
 722 /* Free allocated data belonging to a glob_t structure. */
 723 void
 724 globfree(pglob)
 725         glob_t *pglob;
 726 {
 727         register int i;
 728         register char **pp;
 729
 730         if (pglob->gl_pathv != NULL) {
 731                 pp = pglob->gl_pathv + pglob->gl_offs;
 732                 for (i = pglob->gl_pathc; i--; ++pp)
 733                         if (*pp)
 734                                 free(*pp);
 735                 free(pglob->gl_pathv);
 736         }
 737 }
 738
 739 static DIR *
 740 g_opendir(str, pglob)
 741         register Char *str;
 742         glob_t *pglob;
 743 {
 744         char buf[MAXPATHLEN];
 745
 746         if (!*str)
 747                 strcpy(buf, ".");
 748         else
 749                 g_Ctoc(str, buf);
 750
 751         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 752                 return((*pglob->gl_opendir)(buf));
 753
 754         return(opendir(buf));
 755 }
 756
 757 static int
 758 g_lstat(fn, sb, pglob)
 759         register Char *fn;
 760         struct stat *sb;
 761         glob_t *pglob;
 762 {
 763         char buf[MAXPATHLEN];
 764
 765         g_Ctoc(fn, buf);
 766         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 767                 return((*pglob->gl_lstat)(buf, sb));
 768         return(lstat(buf, sb));
 769 }
 770
 771 static int
 772 g_stat(fn, sb, pglob)
 773         register Char *fn;
 774         struct stat *sb;
 775         glob_t *pglob;
 776 {
 777         char buf[MAXPATHLEN];
 778
 779         g_Ctoc(fn, buf);
 780         if (pglob->gl_flags & GLOB_ALTDIRFUNC)
 781                 return((*pglob->gl_stat)(buf, sb));
 782         return(stat(buf, sb));
 783 }
 784
 785 static Char *
 786 g_strchr(str, ch)
 787         Char *str;
 788         int ch;
 789 {
 790         do {
 791                 if (*str == ch)
 792                         return (str);
 793         } while (*str++);
 794         return (NULL);
 795 }
 796
 797 #ifdef notdef
 798 static Char *
 799 g_strcat(dst, src)
 800         Char *dst;
 801         const Char* src;
 802 {
 803         Char *sdst = dst;
 804
 805         while (*dst++)
 806                 continue;
 807         --dst;
 808         while((*dst++ = *src++) != EOS)
 809             continue;
 810
 811         return (sdst);
 812 }
 813 #endif
 814
 815 static void
 816 g_Ctoc(str, buf)
 817         register const Char *str;
 818         char *buf;
 819 {
 820         register char *dc;
 821
 822         for (dc = buf; (*dc++ = *str++) != EOS;)
 823                 continue;
 824 }
 825
 826 #ifdef DEBUG
 827 static void
 828 qprintf(str, s)
 829         const char *str;
 830         register Char *s;
 831 {
 832         register Char *p;
 833
 834         (void)printf("%s:\n", str);
 835         for (p = s; *p; p++)
 836                 (void)printf("%c", CHAR(*p));
 837         (void)printf("\n");
 838         for (p = s; *p; p++)
 839                 (void)printf("%c", *p & M_PROTECT ? '"' : ' ');
 840         (void)printf("\n");
 841         for (p = s; *p; p++)
 842                 (void)printf("%c", ismeta(*p) ? '_' : ' ');
 843         (void)printf("\n");
 844 }
 845 #endif