posix/glob.c

   1 /* Copyright (C) 1991-2002, 2003, 2004, 2005, 2006, 2007, 2008
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifdef  HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #include <glob.h>
  25
  26 #include <errno.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <stddef.h>
  30
  31 /* Outcomment the following line for production quality code.  */
  32 /* #define NDEBUG 1 */
  33 #include <assert.h>
  34
  35 #include <stdio.h>              /* Needed on stupid SunOS for assert.  */
  36
  37 #if !defined _LIBC || !defined GLOB_ONLY_P
  38 #if defined HAVE_UNISTD_H || defined _LIBC
  39 # include <unistd.h>
  40 # ifndef POSIX
  41 #  ifdef _POSIX_VERSION
  42 #   define POSIX
  43 #  endif
  44 # endif
  45 #endif
  46
  47 #include <pwd.h>
  48
  49 #include <errno.h>
  50 #ifndef __set_errno
  51 # define __set_errno(val) errno = (val)
  52 #endif
  53
  54 #if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
  55 # include <dirent.h>
  56 # define NAMLEN(dirent) strlen((dirent)->d_name)
  57 #else
  58 # define dirent direct
  59 # define NAMLEN(dirent) (dirent)->d_namlen
  60 # ifdef HAVE_SYS_NDIR_H
  61 #  include <sys/ndir.h>
  62 # endif
  63 # ifdef HAVE_SYS_DIR_H
  64 #  include <sys/dir.h>
  65 # endif
  66 # ifdef HAVE_NDIR_H
  67 #  include <ndir.h>
  68 # endif
  69 # ifdef HAVE_VMSDIR_H
  70 #  include "vmsdir.h"
  71 # endif /* HAVE_VMSDIR_H */
  72 #endif
  73
  74
  75 /* In GNU systems, <dirent.h> defines this macro for us.  */
  76 #ifdef _D_NAMLEN
  77 # undef NAMLEN
  78 # define NAMLEN(d) _D_NAMLEN(d)
  79 #endif
  80
  81 /* When used in the GNU libc the symbol _DIRENT_HAVE_D_TYPE is available
  82    if the `d_type' member for `struct dirent' is available.
  83    HAVE_STRUCT_DIRENT_D_TYPE plays the same role in GNULIB.  */
  84 #if defined _DIRENT_HAVE_D_TYPE || defined HAVE_STRUCT_DIRENT_D_TYPE
  85 /* True if the directory entry D must be of type T.  */
  86 # define DIRENT_MUST_BE(d, t)   ((d)->d_type == (t))
  87
  88 /* True if the directory entry D might be a symbolic link.  */
  89 # define DIRENT_MIGHT_BE_SYMLINK(d) \
  90     ((d)->d_type == DT_UNKNOWN || (d)->d_type == DT_LNK)
  91
  92 /* True if the directory entry D might be a directory.  */
  93 # define DIRENT_MIGHT_BE_DIR(d)  \
  94     ((d)->d_type == DT_DIR || DIRENT_MIGHT_BE_SYMLINK (d))
  95
  96 #else /* !HAVE_D_TYPE */
  97 # define DIRENT_MUST_BE(d, t)           false
  98 # define DIRENT_MIGHT_BE_SYMLINK(d)     true
  99 # define DIRENT_MIGHT_BE_DIR(d)         true
 100 #endif /* HAVE_D_TYPE */
 101
 102 /* If the system has the `struct dirent64' type we use it internally.  */
 103 #if defined _LIBC && !defined COMPILE_GLOB64
 104 # if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
 105 #  define CONVERT_D_NAMLEN(d64, d32)
 106 # else
 107 #  define CONVERT_D_NAMLEN(d64, d32) \
 108   (d64)->d_namlen = (d32)->d_namlen;
 109 # endif
 110
 111 # if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
 112 #  define CONVERT_D_INO(d64, d32)
 113 # else
 114 #  define CONVERT_D_INO(d64, d32) \
 115   (d64)->d_ino = (d32)->d_ino;
 116 # endif
 117
 118 # ifdef _DIRENT_HAVE_D_TYPE
 119 #  define CONVERT_D_TYPE(d64, d32) \
 120   (d64)->d_type = (d32)->d_type;
 121 # else
 122 #  define CONVERT_D_TYPE(d64, d32)
 123 # endif
 124
 125 # define CONVERT_DIRENT_DIRENT64(d64, d32) \
 126   memcpy ((d64)->d_name, (d32)->d_name, NAMLEN (d32) + 1);                    \
 127   CONVERT_D_NAMLEN (d64, d32)                                                 \
 128   CONVERT_D_INO (d64, d32)                                                    \
 129   CONVERT_D_TYPE (d64, d32)
 130 #endif
 131
 132
 133 #if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
 134 /* Posix does not require that the d_ino field be present, and some
 135    systems do not provide it. */
 136 # define REAL_DIR_ENTRY(dp) 1
 137 #else
 138 # define REAL_DIR_ENTRY(dp) (dp->d_ino != 0)
 139 #endif /* POSIX */
 140
 141 #include <stdlib.h>
 142 #include <string.h>
 143
 144 /* NAME_MAX is usually defined in <dirent.h> or <limits.h>.  */
 145 #include <limits.h>
 146 #ifndef NAME_MAX
 147 # define NAME_MAX (sizeof (((struct dirent *) 0)->d_name))
 148 #endif
 149
 150 #include <alloca.h>
 151
 152 #ifdef _LIBC
 153 # undef strdup
 154 # define strdup(str) __strdup (str)
 155 # define sysconf(id) __sysconf (id)
 156 # define closedir(dir) __closedir (dir)
 157 # define opendir(name) __opendir (name)
 158 # define readdir(str) __readdir64 (str)
 159 # define getpwnam_r(name, bufp, buf, len, res) \
 160    __getpwnam_r (name, bufp, buf, len, res)
 161 # ifndef __stat64
 162 #  define __stat64(fname, buf) __xstat64 (_STAT_VER, fname, buf)
 163 # endif
 164 # define struct_stat64          struct stat64
 165 #else /* !_LIBC */
 166 # include "getlogin_r.h"
 167 # include "mempcpy.h"
 168 # include "stat-macros.h"
 169 # include "strdup.h"
 170 # define __stat64(fname, buf)   stat (fname, buf)
 171 # define struct_stat64          struct stat
 172 # define __stat(fname, buf)     stat (fname, buf)
 173 # define __alloca               alloca
 174 # define __readdir              readdir
 175 # define __readdir64            readdir64
 176 # define __glob_pattern_p       glob_pattern_p
 177 #endif /* _LIBC */
 178
 179 #include <fnmatch.h>
 180
 181 #ifdef _SC_GETPW_R_SIZE_MAX
 182 # define GETPW_R_SIZE_MAX()     sysconf (_SC_GETPW_R_SIZE_MAX)
 183 #else
 184 # define GETPW_R_SIZE_MAX()     (-1)
 185 #endif
 186 #ifdef _SC_LOGIN_NAME_MAX
 187 # define GET_LOGIN_NAME_MAX()   sysconf (_SC_LOGIN_NAME_MAX)
 188 #else
 189 # define GET_LOGIN_NAME_MAX()   (-1)
 190 #endif
 191 \f
 192 static const char *next_brace_sub (const char *begin, int flags) __THROW;
 193
 194 #endif /* !defined _LIBC || !defined GLOB_ONLY_P */
 195
 196 #ifndef attribute_hidden
 197 # define attribute_hidden
 198 #endif
 199
 200 static int glob_in_dir (const char *pattern, const char *directory,
 201                         int flags, int (*errfunc) (const char *, int),
 202                         glob_t *pglob);
 203 extern int __glob_pattern_type (const char *pattern, int quote)
 204     attribute_hidden;
 205
 206 #if !defined _LIBC || !defined GLOB_ONLY_P
 207 static int prefix_array (const char *prefix, char **array, size_t n) __THROW;
 208 static int collated_compare (const void *, const void *) __THROW;
 209
 210
 211 /* Find the end of the sub-pattern in a brace expression.  */
 212 static const char *
 213 next_brace_sub (const char *cp, int flags)
 214 {
 215   unsigned int depth = 0;
 216   while (*cp != '\0')
 217     if ((flags & GLOB_NOESCAPE) == 0 && *cp == '\\')
 218       {
 219         if (*++cp == '\0')
 220           break;
 221         ++cp;
 222       }
 223     else
 224       {
 225         if ((*cp == '}' && depth-- == 0) || (*cp == ',' && depth == 0))
 226           break;
 227
 228         if (*cp++ == '{')
 229           depth++;
 230       }
 231
 232   return *cp != '\0' ? cp : NULL;
 233 }
 234
 235 #endif /* !defined _LIBC || !defined GLOB_ONLY_P */
 236
 237 /* Do glob searching for PATTERN, placing results in PGLOB.
 238    The bits defined above may be set in FLAGS.
 239    If a directory cannot be opened or read and ERRFUNC is not nil,
 240    it is called with the pathname that caused the error, and the
 241    `errno' value from the failing call; if it returns non-zero
 242    `glob' returns GLOB_ABORTED; if it returns zero, the error is ignored.
 243    If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned.
 244    Otherwise, `glob' returns zero.  */
 245 int
 246 #ifdef GLOB_ATTRIBUTE
 247 GLOB_ATTRIBUTE
 248 #endif
 249 glob (pattern, flags, errfunc, pglob)
 250      const char *pattern;
 251      int flags;
 252      int (*errfunc) (const char *, int);
 253      glob_t *pglob;
 254 {
 255   const char *filename;
 256   const char *dirname;
 257   size_t dirlen;
 258   int status;
 259   size_t oldcount;
 260   int meta;
 261   int dirname_modified;
 262   glob_t dirs;
 263
 264   if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0)
 265     {
 266       __set_errno (EINVAL);
 267       return -1;
 268     }
 269
 270   if (!(flags & GLOB_DOOFFS))
 271     /* Have to do this so `globfree' knows where to start freeing.  It
 272        also makes all the code that uses gl_offs simpler. */
 273     pglob->gl_offs = 0;
 274
 275   if (flags & GLOB_BRACE)
 276     {
 277       const char *begin;
 278
 279       if (flags & GLOB_NOESCAPE)
 280         begin = strchr (pattern, '{');
 281       else
 282         {
 283           begin = pattern;
 284           while (1)
 285             {
 286               if (*begin == '\0')
 287                 {
 288                   begin = NULL;
 289                   break;
 290                 }
 291
 292               if (*begin == '\\' && begin[1] != '\0')
 293                 ++begin;
 294               else if (*begin == '{')
 295                 break;
 296
 297               ++begin;
 298             }
 299         }
 300
 301       if (begin != NULL)
 302         {
 303           /* Allocate working buffer large enough for our work.  Note that
 304             we have at least an opening and closing brace.  */
 305           size_t firstc;
 306           char *alt_start;
 307           const char *p;
 308           const char *next;
 309           const char *rest;
 310           size_t rest_len;
 311 #ifdef __GNUC__
 312           char onealt[strlen (pattern) - 1];
 313 #else
 314           char *onealt = (char *) malloc (strlen (pattern) - 1);
 315           if (onealt == NULL)
 316             {
 317               if (!(flags & GLOB_APPEND))
 318                 {
 319                   pglob->gl_pathc = 0;
 320                   pglob->gl_pathv = NULL;
 321                 }
 322               return GLOB_NOSPACE;
 323             }
 324 #endif
 325
 326           /* We know the prefix for all sub-patterns.  */
 327           alt_start = mempcpy (onealt, pattern, begin - pattern);
 328
 329           /* Find the first sub-pattern and at the same time find the
 330              rest after the closing brace.  */
 331           next = next_brace_sub (begin + 1, flags);
 332           if (next == NULL)
 333             {
 334               /* It is an illegal expression.  */
 335 #ifndef __GNUC__
 336               free (onealt);
 337 #endif
 338               return glob (pattern, flags & ~GLOB_BRACE, errfunc, pglob);
 339             }
 340
 341           /* Now find the end of the whole brace expression.  */
 342           rest = next;
 343           while (*rest != '}')
 344             {
 345               rest = next_brace_sub (rest + 1, flags);
 346               if (rest == NULL)
 347                 {
 348                   /* It is an illegal expression.  */
 349 #ifndef __GNUC__
 350                   free (onealt);
 351 #endif
 352                   return glob (pattern, flags & ~GLOB_BRACE, errfunc, pglob);
 353                 }
 354             }
 355           /* Please note that we now can be sure the brace expression
 356              is well-formed.  */
 357           rest_len = strlen (++rest) + 1;
 358
 359           /* We have a brace expression.  BEGIN points to the opening {,
 360              NEXT points past the terminator of the first element, and END
 361              points past the final }.  We will accumulate result names from
 362              recursive runs for each brace alternative in the buffer using
 363              GLOB_APPEND.  */
 364
 365           if (!(flags & GLOB_APPEND))
 366             {
 367               /* This call is to set a new vector, so clear out the
 368                  vector so we can append to it.  */
 369               pglob->gl_pathc = 0;
 370               pglob->gl_pathv = NULL;
 371             }
 372           firstc = pglob->gl_pathc;
 373
 374           p = begin + 1;
 375           while (1)
 376             {
 377               int result;
 378
 379               /* Construct the new glob expression.  */
 380               mempcpy (mempcpy (alt_start, p, next - p), rest, rest_len);
 381
 382               result = glob (onealt,
 383                              ((flags & ~(GLOB_NOCHECK | GLOB_NOMAGIC))
 384                               | GLOB_APPEND), errfunc, pglob);
 385
 386               /* If we got an error, return it.  */
 387               if (result && result != GLOB_NOMATCH)
 388                 {
 389 #ifndef __GNUC__
 390                   free (onealt);
 391 #endif
 392                   if (!(flags & GLOB_APPEND))
 393                     {
 394                       globfree (pglob);
 395                       pglob->gl_pathc = 0;
 396                     }
 397                   return result;
 398                 }
 399
 400               if (*next == '}')
 401                 /* We saw the last entry.  */
 402                 break;
 403
 404               p = next + 1;
 405               next = next_brace_sub (p, flags);
 406               assert (next != NULL);
 407             }
 408
 409 #ifndef __GNUC__
 410           free (onealt);
 411 #endif
 412
 413           if (pglob->gl_pathc != firstc)
 414             /* We found some entries.  */
 415             return 0;
 416           else if (!(flags & (GLOB_NOCHECK|GLOB_NOMAGIC)))
 417             return GLOB_NOMATCH;
 418         }
 419     }
 420
 421   /* Find the filename.  */
 422   filename = strrchr (pattern, '/');
 423 #if defined __MSDOS__ || defined WINDOWS32
 424   /* The case of "d:pattern".  Since `:' is not allowed in
 425      file names, we can safely assume that wherever it
 426      happens in pattern, it signals the filename part.  This
 427      is so we could some day support patterns like "[a-z]:foo".  */
 428   if (filename == NULL)
 429     filename = strchr (pattern, ':');
 430 #endif /* __MSDOS__ || WINDOWS32 */
 431   dirname_modified = 0;
 432   if (filename == NULL)
 433     {
 434       /* This can mean two things: a simple name or "~name".  The latter
 435          case is nothing but a notation for a directory.  */
 436       if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && pattern[0] == '~')
 437         {
 438           dirname = pattern;
 439           dirlen = strlen (pattern);
 440
 441           /* Set FILENAME to NULL as a special flag.  This is ugly but
 442              other solutions would require much more code.  We test for
 443              this special case below.  */
 444           filename = NULL;
 445         }
 446       else
 447         {
 448           filename = pattern;
 449 #ifdef _AMIGA
 450           dirname = "";
 451 #else
 452           dirname = ".";
 453 #endif
 454           dirlen = 0;
 455         }
 456     }
 457   else if (filename == pattern
 458            || (filename == pattern + 1 && pattern[0] == '\\'
 459                && (flags & GLOB_NOESCAPE) == 0))
 460     {
 461       /* "/pattern" or "\\/pattern".  */
 462       dirname = "/";
 463       dirlen = 1;
 464       ++filename;
 465     }
 466   else
 467     {
 468       char *newp;
 469       dirlen = filename - pattern;
 470 #if defined __MSDOS__ || defined WINDOWS32
 471       if (*filename == ':'
 472           || (filename > pattern + 1 && filename[-1] == ':'))
 473         {
 474           char *drive_spec;
 475
 476           ++dirlen;
 477           drive_spec = (char *) __alloca (dirlen + 1);
 478           *((char *) mempcpy (drive_spec, pattern, dirlen)) = '\0';
 479           /* For now, disallow wildcards in the drive spec, to
 480              prevent infinite recursion in glob.  */
 481           if (__glob_pattern_p (drive_spec, !(flags & GLOB_NOESCAPE)))
 482             return GLOB_NOMATCH;
 483           /* If this is "d:pattern", we need to copy `:' to DIRNAME
 484              as well.  If it's "d:/pattern", don't remove the slash
 485              from "d:/", since "d:" and "d:/" are not the same.*/
 486         }
 487 #endif
 488       newp = (char *) __alloca (dirlen + 1);
 489       *((char *) mempcpy (newp, pattern, dirlen)) = '\0';
 490       dirname = newp;
 491       ++filename;
 492
 493       if (filename[0] == '\0'
 494 #if defined __MSDOS__ || defined WINDOWS32
 495           && dirname[dirlen - 1] != ':'
 496           && (dirlen < 3 || dirname[dirlen - 2] != ':'
 497               || dirname[dirlen - 1] != '/')
 498 #endif
 499           && dirlen > 1)
 500         /* "pattern/".  Expand "pattern", appending slashes.  */
 501         {
 502           int orig_flags = flags;
 503           if (!(flags & GLOB_NOESCAPE) && dirname[dirlen - 1] == '\\')
 504             {
 505               /* "pattern\\/".  Remove the final backslash if it hasn't
 506                  been quoted.  */
 507               char *p = (char *) &dirname[dirlen - 1];
 508
 509               while (p > dirname && p[-1] == '\\') --p;
 510               if ((&dirname[dirlen] - p) & 1)
 511                 {
 512                   *(char *) &dirname[--dirlen] = '\0';
 513                   flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC);
 514                 }
 515             }
 516           int val = glob (dirname, flags | GLOB_MARK, errfunc, pglob);
 517           if (val == 0)
 518             pglob->gl_flags = ((pglob->gl_flags & ~GLOB_MARK)
 519                                | (flags & GLOB_MARK));
 520           else if (val == GLOB_NOMATCH && flags != orig_flags)
 521             {
 522               /* Make sure globfree (&dirs); is a nop.  */
 523               dirs.gl_pathv = NULL;
 524               flags = orig_flags;
 525               oldcount = pglob->gl_pathc + pglob->gl_offs;
 526               goto no_matches;
 527             }
 528           return val;
 529         }
 530     }
 531
 532   if (!(flags & GLOB_APPEND))
 533     {
 534       pglob->gl_pathc = 0;
 535       if (!(flags & GLOB_DOOFFS))
 536         pglob->gl_pathv = NULL;
 537       else
 538         {
 539           size_t i;
 540           pglob->gl_pathv = (char **) malloc ((pglob->gl_offs + 1)
 541                                               * sizeof (char *));
 542           if (pglob->gl_pathv == NULL)
 543             return GLOB_NOSPACE;
 544
 545           for (i = 0; i <= pglob->gl_offs; ++i)
 546             pglob->gl_pathv[i] = NULL;
 547         }
 548     }
 549
 550   oldcount = pglob->gl_pathc + pglob->gl_offs;
 551
 552 #ifndef VMS
 553   if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && dirname[0] == '~')
 554     {
 555       if (dirname[1] == '\0' || dirname[1] == '/'
 556           || (!(flags & GLOB_NOESCAPE) && dirname[1] == '\\'
 557               && (dirname[2] == '\0' || dirname[2] == '/')))
 558         {
 559           /* Look up home directory.  */
 560           const char *home_dir = getenv ("HOME");
 561 # ifdef _AMIGA
 562           if (home_dir == NULL || home_dir[0] == '\0')
 563             home_dir = "SYS:";
 564 # else
 565 #  ifdef WINDOWS32
 566           if (home_dir == NULL || home_dir[0] == '\0')
 567             home_dir = "c:/users/default"; /* poor default */
 568 #  else
 569           if (home_dir == NULL || home_dir[0] == '\0')
 570             {
 571               int success;
 572               char *name;
 573               size_t buflen = GET_LOGIN_NAME_MAX () + 1;
 574
 575               if (buflen == 0)
 576                 /* `sysconf' does not support _SC_LOGIN_NAME_MAX.  Try
 577                    a moderate value.  */
 578                 buflen = 20;
 579               name = (char *) __alloca (buflen);
 580
 581               success = getlogin_r (name, buflen) == 0;
 582               if (success)
 583                 {
 584                   struct passwd *p;
 585 #   if defined HAVE_GETPWNAM_R || defined _LIBC
 586                   long int pwbuflen = GETPW_R_SIZE_MAX ();
 587                   char *pwtmpbuf;
 588                   struct passwd pwbuf;
 589                   int save = errno;
 590
 591 #    ifndef _LIBC
 592                   if (pwbuflen == -1)
 593                     /* `sysconf' does not support _SC_GETPW_R_SIZE_MAX.
 594                        Try a moderate value.  */
 595                     pwbuflen = 1024;
 596 #    endif
 597                   pwtmpbuf = (char *) __alloca (pwbuflen);
 598
 599                   while (getpwnam_r (name, &pwbuf, pwtmpbuf, pwbuflen, &p)
 600                          != 0)
 601                     {
 602                       if (errno != ERANGE)
 603                         {
 604                           p = NULL;
 605                           break;
 606                         }
 607 #    ifdef _LIBC
 608                       pwtmpbuf = extend_alloca (pwtmpbuf, pwbuflen,
 609                                                 2 * pwbuflen);
 610 #    else
 611                       pwbuflen *= 2;
 612                       pwtmpbuf = (char *) __alloca (pwbuflen);
 613 #    endif
 614                       __set_errno (save);
 615                     }
 616 #   else
 617                   p = getpwnam (name);
 618 #   endif
 619                   if (p != NULL)
 620                     home_dir = p->pw_dir;
 621                 }
 622             }
 623           if (home_dir == NULL || home_dir[0] == '\0')
 624             {
 625               if (flags & GLOB_TILDE_CHECK)
 626                 return GLOB_NOMATCH;
 627               else
 628                 home_dir = "~"; /* No luck.  */
 629             }
 630 #  endif /* WINDOWS32 */
 631 # endif
 632           /* Now construct the full directory.  */
 633           if (dirname[1] == '\0')
 634             {
 635               dirname = home_dir;
 636               dirlen = strlen (dirname);
 637             }
 638           else
 639             {
 640               char *newp;
 641               size_t home_len = strlen (home_dir);
 642               newp = (char *) __alloca (home_len + dirlen);
 643               mempcpy (mempcpy (newp, home_dir, home_len),
 644                        &dirname[1], dirlen);
 645               dirname = newp;
 646               dirlen += home_len - 1;
 647             }
 648           dirname_modified = 1;
 649         }
 650 # if !defined _AMIGA && !defined WINDOWS32
 651       else
 652         {
 653           char *end_name = strchr (dirname, '/');
 654           const char *user_name;
 655           const char *home_dir;
 656           char *unescape = NULL;
 657
 658           if (!(flags & GLOB_NOESCAPE))
 659             {
 660               if (end_name == NULL)
 661                 {
 662                   unescape = strchr (dirname, '\\');
 663                   if (unescape)
 664                     end_name = strchr (unescape, '\0');
 665                 }
 666               else
 667                 unescape = memchr (dirname, '\\', end_name - dirname);
 668             }
 669           if (end_name == NULL)
 670             user_name = dirname + 1;
 671           else
 672             {
 673               char *newp;
 674               newp = (char *) __alloca (end_name - dirname);
 675               if (unescape != NULL)
 676                 {
 677                   char *p = mempcpy (newp, dirname + 1,
 678                                      unescape - dirname - 1);
 679                   char *q = unescape;
 680                   while (*q != '\0')
 681                     {
 682                       if (*q == '\\')
 683                         {
 684                           if (q[1] == '\0')
 685                             {
 686                               /* "~fo\\o\\" unescape to user_name "foo\\",
 687                                  but "~fo\\o\\/" unescape to user_name
 688                                  "foo".  */
 689                               if (filename == NULL)
 690                                 *p++ = '\\';
 691                               break;
 692                             }
 693                           ++q;
 694                         }
 695                       *p++ = *q++;
 696                     }
 697                   *p = '\0';
 698                 }
 699               else
 700                 *((char *) mempcpy (newp, dirname + 1, end_name - dirname))
 701                   = '\0';
 702               user_name = newp;
 703             }
 704
 705           /* Look up specific user's home directory.  */
 706           {
 707             struct passwd *p;
 708 #  if defined HAVE_GETPWNAM_R || defined _LIBC
 709             long int buflen = GETPW_R_SIZE_MAX ();
 710             char *pwtmpbuf;
 711             struct passwd pwbuf;
 712             int save = errno;
 713
 714 #   ifndef _LIBC
 715             if (buflen == -1)
 716               /* `sysconf' does not support _SC_GETPW_R_SIZE_MAX.  Try a
 717                  moderate value.  */
 718               buflen = 1024;
 719 #   endif
 720             pwtmpbuf = (char *) __alloca (buflen);
 721
 722             while (getpwnam_r (user_name, &pwbuf, pwtmpbuf, buflen, &p) != 0)
 723               {
 724                 if (errno != ERANGE)
 725                   {
 726                     p = NULL;
 727                     break;
 728                   }
 729 #   ifdef _LIBC
 730                 pwtmpbuf = extend_alloca (pwtmpbuf, buflen, 2 * buflen);
 731 #   else
 732                 buflen *= 2;
 733                 pwtmpbuf = __alloca (buflen);
 734 #   endif
 735                 __set_errno (save);
 736               }
 737 #  else
 738             p = getpwnam (user_name);
 739 #  endif
 740             if (p != NULL)
 741               home_dir = p->pw_dir;
 742             else
 743               home_dir = NULL;
 744           }
 745           /* If we found a home directory use this.  */
 746           if (home_dir != NULL)
 747             {
 748               char *newp;
 749               size_t home_len = strlen (home_dir);
 750               size_t rest_len = end_name == NULL ? 0 : strlen (end_name);
 751               newp = (char *) __alloca (home_len + rest_len + 1);
 752               *((char *) mempcpy (mempcpy (newp, home_dir, home_len),
 753                                   end_name, rest_len)) = '\0';
 754               dirname = newp;
 755               dirlen = home_len + rest_len;
 756               dirname_modified = 1;
 757             }
 758           else
 759             if (flags & GLOB_TILDE_CHECK)
 760               /* We have to regard it as an error if we cannot find the
 761                  home directory.  */
 762               return GLOB_NOMATCH;
 763         }
 764 # endif /* Not Amiga && not WINDOWS32.  */
 765     }
 766 #endif  /* Not VMS.  */
 767
 768   /* Now test whether we looked for "~" or "~NAME".  In this case we
 769      can give the answer now.  */
 770   if (filename == NULL)
 771     {
 772       struct stat st;
 773       struct_stat64 st64;
 774
 775       /* Return the directory if we don't check for error or if it exists.  */
 776       if ((flags & GLOB_NOCHECK)
 777           || (((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0))
 778                ? ((*pglob->gl_stat) (dirname, &st) == 0
 779                   && S_ISDIR (st.st_mode))
 780                : (__stat64 (dirname, &st64) == 0 && S_ISDIR (st64.st_mode)))))
 781         {
 782           int newcount = pglob->gl_pathc + pglob->gl_offs;
 783           char **new_gl_pathv;
 784
 785           new_gl_pathv
 786             = (char **) realloc (pglob->gl_pathv,
 787                                  (newcount + 1 + 1) * sizeof (char *));
 788           if (new_gl_pathv == NULL)
 789             {
 790             nospace:
 791               free (pglob->gl_pathv);
 792               pglob->gl_pathv = NULL;
 793               pglob->gl_pathc = 0;
 794               return GLOB_NOSPACE;
 795             }
 796           pglob->gl_pathv = new_gl_pathv;
 797
 798           if (flags & GLOB_MARK)
 799             {
 800               char *p;
 801               pglob->gl_pathv[newcount] = malloc (dirlen + 2);
 802               if (pglob->gl_pathv[newcount] == NULL)
 803                 goto nospace;
 804               p = mempcpy (pglob->gl_pathv[newcount], dirname, dirlen);
 805               p[0] = '/';
 806               p[1] = '\0';
 807             }
 808           else
 809             {
 810               pglob->gl_pathv[newcount] = strdup (dirname);
 811               if (pglob->gl_pathv[newcount] == NULL)
 812                 goto nospace;
 813             }
 814           pglob->gl_pathv[++newcount] = NULL;
 815           ++pglob->gl_pathc;
 816           pglob->gl_flags = flags;
 817
 818           return 0;
 819         }
 820
 821       /* Not found.  */
 822       return GLOB_NOMATCH;
 823     }
 824
 825   meta = __glob_pattern_type (dirname, !(flags & GLOB_NOESCAPE));
 826   /* meta is 1 if correct glob pattern containing metacharacters.
 827      If meta has bit (1 << 2) set, it means there was an unterminated
 828      [ which we handle the same, using fnmatch.  Broken unterminated
 829      pattern bracket expressions ought to be rare enough that it is
 830      not worth special casing them, fnmatch will do the right thing.  */
 831   if (meta & 5)
 832     {
 833       /* The directory name contains metacharacters, so we
 834          have to glob for the directory, and then glob for
 835          the pattern in each directory found.  */
 836       size_t i;
 837
 838       if (!(flags & GLOB_NOESCAPE) && dirlen > 0 && dirname[dirlen - 1] == '\\')
 839         {
 840           /* "foo\\/bar".  Remove the final backslash from dirname
 841              if it has not been quoted.  */
 842           char *p = (char *) &dirname[dirlen - 1];
 843
 844           while (p > dirname && p[-1] == '\\') --p;
 845           if ((&dirname[dirlen] - p) & 1)
 846             *(char *) &dirname[--dirlen] = '\0';
 847         }
 848
 849       if (__builtin_expect ((flags & GLOB_ALTDIRFUNC) != 0, 0))
 850         {
 851           /* Use the alternative access functions also in the recursive
 852              call.  */
 853           dirs.gl_opendir = pglob->gl_opendir;
 854           dirs.gl_readdir = pglob->gl_readdir;
 855           dirs.gl_closedir = pglob->gl_closedir;
 856           dirs.gl_stat = pglob->gl_stat;
 857           dirs.gl_lstat = pglob->gl_lstat;
 858         }
 859
 860       status = glob (dirname,
 861                      ((flags & (GLOB_ERR | GLOB_NOESCAPE
 862                                 | GLOB_ALTDIRFUNC))
 863                       | GLOB_NOSORT | GLOB_ONLYDIR),
 864                      errfunc, &dirs);
 865       if (status != 0)
 866         {
 867           if ((flags & GLOB_NOCHECK) == 0 || status != GLOB_NOMATCH)
 868             return status;
 869           goto no_matches;
 870         }
 871
 872       /* We have successfully globbed the preceding directory name.
 873          For each name we found, call glob_in_dir on it and FILENAME,
 874          appending the results to PGLOB.  */
 875       for (i = 0; i < dirs.gl_pathc; ++i)
 876         {
 877           int old_pathc;
 878
 879 #ifdef  SHELL
 880           {
 881             /* Make globbing interruptible in the bash shell. */
 882             extern int interrupt_state;
 883
 884             if (interrupt_state)
 885               {
 886                 globfree (&dirs);
 887                 return GLOB_ABORTED;
 888               }
 889           }
 890 #endif /* SHELL.  */
 891
 892           old_pathc = pglob->gl_pathc;
 893           status = glob_in_dir (filename, dirs.gl_pathv[i],
 894                                 ((flags | GLOB_APPEND)
 895                                  & ~(GLOB_NOCHECK | GLOB_NOMAGIC)),
 896                                 errfunc, pglob);
 897           if (status == GLOB_NOMATCH)
 898             /* No matches in this directory.  Try the next.  */
 899             continue;
 900
 901           if (status != 0)
 902             {
 903               globfree (&dirs);
 904               globfree (pglob);
 905               pglob->gl_pathc = 0;
 906               return status;
 907             }
 908
 909           /* Stick the directory on the front of each name.  */
 910           if (prefix_array (dirs.gl_pathv[i],
 911                             &pglob->gl_pathv[old_pathc + pglob->gl_offs],
 912                             pglob->gl_pathc - old_pathc))
 913             {
 914               globfree (&dirs);
 915               globfree (pglob);
 916               pglob->gl_pathc = 0;
 917               return GLOB_NOSPACE;
 918             }
 919         }
 920
 921       flags |= GLOB_MAGCHAR;
 922
 923       /* We have ignored the GLOB_NOCHECK flag in the `glob_in_dir' calls.
 924          But if we have not found any matching entry and the GLOB_NOCHECK
 925          flag was set we must return the input pattern itself.  */
 926       if (pglob->gl_pathc + pglob->gl_offs == oldcount)
 927         {
 928         no_matches:
 929           /* No matches.  */
 930           if (flags & GLOB_NOCHECK)
 931             {
 932               int newcount = pglob->gl_pathc + pglob->gl_offs;
 933               char **new_gl_pathv;
 934
 935               new_gl_pathv = (char **) realloc (pglob->gl_pathv,
 936                                                 (newcount + 2)
 937                                                 * sizeof (char *));
 938               if (new_gl_pathv == NULL)
 939                 {
 940                   globfree (&dirs);
 941                   return GLOB_NOSPACE;
 942                 }
 943               pglob->gl_pathv = new_gl_pathv;
 944
 945               pglob->gl_pathv[newcount] = __strdup (pattern);
 946               if (pglob->gl_pathv[newcount] == NULL)
 947                 {
 948                   globfree (&dirs);
 949                   globfree (pglob);
 950                   pglob->gl_pathc = 0;
 951                   return GLOB_NOSPACE;
 952                 }
 953
 954               ++pglob->gl_pathc;
 955               ++newcount;
 956
 957               pglob->gl_pathv[newcount] = NULL;
 958               pglob->gl_flags = flags;
 959             }
 960           else
 961             {
 962               globfree (&dirs);
 963               return GLOB_NOMATCH;
 964             }
 965         }
 966
 967       globfree (&dirs);
 968     }
 969   else
 970     {
 971       int old_pathc = pglob->gl_pathc;
 972       int orig_flags = flags;
 973
 974       if (meta & 2)
 975         {
 976           char *p = strchr (dirname, '\\'), *q;
 977           /* We need to unescape the dirname string.  It is certainly
 978              allocated by alloca, as otherwise filename would be NULL
 979              or dirname wouldn't contain backslashes.  */
 980           q = p;
 981           do
 982             {
 983               if (*p == '\\')
 984                 {
 985                   *q = *++p;
 986                   --dirlen;
 987                 }
 988               else
 989                 *q = *p;
 990               ++q;
 991             }
 992           while (*p++ != '\0');
 993           dirname_modified = 1;
 994         }
 995       if (dirname_modified)
 996         flags &= ~(GLOB_NOCHECK | GLOB_NOMAGIC);
 997       status = glob_in_dir (filename, dirname, flags, errfunc, pglob);
 998       if (status != 0)
 999         {
1000           if (status == GLOB_NOMATCH && flags != orig_flags
1001               && pglob->gl_pathc + pglob->gl_offs == oldcount)
1002             {
1003               /* Make sure globfree (&dirs); is a nop.  */
1004               dirs.gl_pathv = NULL;
1005               flags = orig_flags;
1006               goto no_matches;
1007             }
1008           return status;
1009         }
1010
1011       if (dirlen > 0)
1012         {
1013           /* Stick the directory on the front of each name.  */
1014           if (prefix_array (dirname,
1015                             &pglob->gl_pathv[old_pathc + pglob->gl_offs],
1016                             pglob->gl_pathc - old_pathc))
1017             {
1018               globfree (pglob);
1019               pglob->gl_pathc = 0;
1020               return GLOB_NOSPACE;
1021             }
1022         }
1023     }
1024
1025   if (flags & GLOB_MARK)
1026     {
1027       /* Append slashes to directory names.  */
1028       size_t i;
1029       struct stat st;
1030       struct_stat64 st64;
1031
1032       for (i = oldcount; i < pglob->gl_pathc + pglob->gl_offs; ++i)
1033         if ((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
1034              ? ((*pglob->gl_stat) (pglob->gl_pathv[i], &st) == 0
1035                 && S_ISDIR (st.st_mode))
1036              : (__stat64 (pglob->gl_pathv[i], &st64) == 0
1037                 && S_ISDIR (st64.st_mode))))
1038           {
1039             size_t len = strlen (pglob->gl_pathv[i]) + 2;
1040             char *new = realloc (pglob->gl_pathv[i], len);
1041             if (new == NULL)
1042               {
1043                 globfree (pglob);
1044                 pglob->gl_pathc = 0;
1045                 return GLOB_NOSPACE;
1046               }
1047             strcpy (&new[len - 2], "/");
1048             pglob->gl_pathv[i] = new;
1049           }
1050     }
1051
1052   if (!(flags & GLOB_NOSORT))
1053     {
1054       /* Sort the vector.  */
1055       qsort (&pglob->gl_pathv[oldcount],
1056              pglob->gl_pathc + pglob->gl_offs - oldcount,
1057              sizeof (char *), collated_compare);
1058     }
1059
1060   return 0;
1061 }
1062 #if defined _LIBC && !defined glob
1063 libc_hidden_def (glob)
1064 #endif
1065
1066
1067 #if !defined _LIBC || !defined GLOB_ONLY_P
1068
1069 /* Free storage allocated in PGLOB by a previous `glob' call.  */
1070 void
1071 globfree (pglob)
1072      register glob_t *pglob;
1073 {
1074   if (pglob->gl_pathv != NULL)
1075     {
1076       size_t i;
1077       for (i = 0; i < pglob->gl_pathc; ++i)
1078         free (pglob->gl_pathv[pglob->gl_offs + i]);
1079       free (pglob->gl_pathv);
1080       pglob->gl_pathv = NULL;
1081     }
1082 }
1083 #if defined _LIBC && !defined globfree
1084 libc_hidden_def (globfree)
1085 #endif
1086
1087
1088 /* Do a collated comparison of A and B.  */
1089 static int
1090 collated_compare (const void *a, const void *b)
1091 {
1092   const char *const s1 = *(const char *const * const) a;
1093   const char *const s2 = *(const char *const * const) b;
1094
1095   if (s1 == s2)
1096     return 0;
1097   if (s1 == NULL)
1098     return 1;
1099   if (s2 == NULL)
1100     return -1;
1101   return strcoll (s1, s2);
1102 }
1103
1104
1105 /* Prepend DIRNAME to each of N members of ARRAY, replacing ARRAY's
1106    elements in place.  Return nonzero if out of memory, zero if successful.
1107    A slash is inserted between DIRNAME and each elt of ARRAY,
1108    unless DIRNAME is just "/".  Each old element of ARRAY is freed.  */
1109 static int
1110 prefix_array (const char *dirname, char **array, size_t n)
1111 {
1112   register size_t i;
1113   size_t dirlen = strlen (dirname);
1114 #if defined __MSDOS__ || defined WINDOWS32
1115   int sep_char = '/';
1116 # define DIRSEP_CHAR sep_char
1117 #else
1118 # define DIRSEP_CHAR '/'
1119 #endif
1120
1121   if (dirlen == 1 && dirname[0] == '/')
1122     /* DIRNAME is just "/", so normal prepending would get us "//foo".
1123        We want "/foo" instead, so don't prepend any chars from DIRNAME.  */
1124     dirlen = 0;
1125 #if defined __MSDOS__ || defined WINDOWS32
1126   else if (dirlen > 1)
1127     {
1128       if (dirname[dirlen - 1] == '/' && dirname[dirlen - 2] == ':')
1129         /* DIRNAME is "d:/".  Don't prepend the slash from DIRNAME.  */
1130         --dirlen;
1131       else if (dirname[dirlen - 1] == ':')
1132         {
1133           /* DIRNAME is "d:".  Use `:' instead of `/'.  */
1134           --dirlen;
1135           sep_char = ':';
1136         }
1137     }
1138 #endif
1139
1140   for (i = 0; i < n; ++i)
1141     {
1142       size_t eltlen = strlen (array[i]) + 1;
1143       char *new = (char *) malloc (dirlen + 1 + eltlen);
1144       if (new == NULL)
1145         {
1146           while (i > 0)
1147             free (array[--i]);
1148           return 1;
1149         }
1150
1151       {
1152         char *endp = mempcpy (new, dirname, dirlen);
1153         *endp++ = DIRSEP_CHAR;
1154         mempcpy (endp, array[i], eltlen);
1155       }
1156       free (array[i]);
1157       array[i] = new;
1158     }
1159
1160   return 0;
1161 }
1162
1163
1164 /* We must not compile this function twice.  */
1165 #if !defined _LIBC || !defined NO_GLOB_PATTERN_P
1166 int
1167 __glob_pattern_type (pattern, quote)
1168      const char *pattern;
1169      int quote;
1170 {
1171   register const char *p;
1172   int ret = 0;
1173
1174   for (p = pattern; *p != '\0'; ++p)
1175     switch (*p)
1176       {
1177       case '?':
1178       case '*':
1179         return 1;
1180
1181       case '\\':
1182         if (quote)
1183           {
1184             if (p[1] != '\0')
1185               ++p;
1186             ret |= 2;
1187           }
1188         break;
1189
1190       case '[':
1191         ret |= 4;
1192         break;
1193
1194       case ']':
1195         if (ret & 4)
1196           return 1;
1197         break;
1198       }
1199
1200   return ret;
1201 }
1202
1203 /* Return nonzero if PATTERN contains any metacharacters.
1204    Metacharacters can be quoted with backslashes if QUOTE is nonzero.  */
1205 int
1206 __glob_pattern_p (pattern, quote)
1207      const char *pattern;
1208      int quote;
1209 {
1210   return __glob_pattern_type (pattern, quote) == 1;
1211 }
1212 # ifdef _LIBC
1213 weak_alias (__glob_pattern_p, glob_pattern_p)
1214 # endif
1215 #endif
1216
1217 #endif /* !GLOB_ONLY_P */
1218
1219
1220 /* We put this in a separate function mainly to allow the memory
1221    allocated with alloca to be recycled.  */
1222 #if !defined _LIBC || !defined GLOB_ONLY_P
1223 static int
1224 __attribute_noinline__
1225 link_exists2_p (const char *dir, size_t dirlen, const char *fname,
1226                glob_t *pglob
1227 # ifndef _LIBC
1228                 , int flags
1229 # endif
1230                 )
1231 {
1232   size_t fnamelen = strlen (fname);
1233   char *fullname = (char *) __alloca (dirlen + 1 + fnamelen + 1);
1234   struct stat st;
1235 # ifndef _LIBC
1236   struct_stat64 st64;
1237 # endif
1238
1239   mempcpy (mempcpy (mempcpy (fullname, dir, dirlen), "/", 1),
1240            fname, fnamelen + 1);
1241
1242 # ifdef _LIBC
1243   return (*pglob->gl_stat) (fullname, &st) == 0;
1244 # else
1245   return ((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
1246            ? (*pglob->gl_stat) (fullname, &st)
1247            : __stat64 (fullname, &st64)) == 0);
1248 # endif
1249 }
1250 # ifdef _LIBC
1251 #  define link_exists_p(dfd, dirname, dirnamelen, fname, pglob, flags) \
1252   (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)                              \
1253    ? link_exists2_p (dirname, dirnamelen, fname, pglob)                       \
1254    : ({ struct stat64 st64;                                                   \
1255        __fxstatat64 (_STAT_VER, dfd, fname, &st64, 0) == 0; }))
1256 # else
1257 #  define link_exists_p(dfd, dirname, dirnamelen, fname, pglob, flags) \
1258   link_exists2_p (dirname, dirnamelen, fname, pglob, flags)
1259 # endif
1260 #endif
1261
1262
1263 /* Like `glob', but PATTERN is a final pathname component,
1264    and matches are searched for in DIRECTORY.
1265    The GLOB_NOSORT bit in FLAGS is ignored.  No sorting is ever done.
1266    The GLOB_APPEND flag is assumed to be set (always appends).  */
1267 static int
1268 glob_in_dir (const char *pattern, const char *directory, int flags,
1269              int (*errfunc) (const char *, int),
1270              glob_t *pglob)
1271 {
1272   size_t dirlen = strlen (directory);
1273   void *stream = NULL;
1274   struct globnames
1275     {
1276       struct globnames *next;
1277       size_t count;
1278       char *name[64];
1279     };
1280 #define INITIAL_COUNT sizeof (init_names.name) / sizeof (init_names.name[0])
1281   struct globnames init_names;
1282   struct globnames *names = &init_names;
1283   struct globnames *names_alloca = &init_names;
1284   size_t nfound = 0;
1285   size_t allocasize = sizeof (init_names);
1286   size_t cur = 0;
1287   int meta;
1288   int save;
1289
1290   init_names.next = NULL;
1291   init_names.count = INITIAL_COUNT;
1292
1293   meta = __glob_pattern_type (pattern, !(flags & GLOB_NOESCAPE));
1294   if (meta == 0 && (flags & (GLOB_NOCHECK|GLOB_NOMAGIC)))
1295     {
1296       /* We need not do any tests.  The PATTERN contains no meta
1297          characters and we must not return an error therefore the
1298          result will always contain exactly one name.  */
1299       flags |= GLOB_NOCHECK;
1300     }
1301   else if (meta == 0)
1302     {
1303       /* Since we use the normal file functions we can also use stat()
1304          to verify the file is there.  */
1305       struct stat st;
1306       struct_stat64 st64;
1307       size_t patlen = strlen (pattern);
1308       char *fullname = (char *) __alloca (dirlen + 1 + patlen + 1);
1309
1310       mempcpy (mempcpy (mempcpy (fullname, directory, dirlen),
1311                         "/", 1),
1312                pattern, patlen + 1);
1313       if ((__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
1314            ? (*pglob->gl_stat) (fullname, &st)
1315            : __stat64 (fullname, &st64)) == 0)
1316         /* We found this file to be existing.  Now tell the rest
1317            of the function to copy this name into the result.  */
1318         flags |= GLOB_NOCHECK;
1319     }
1320   else
1321     {
1322       stream = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
1323                 ? (*pglob->gl_opendir) (directory)
1324                 : opendir (directory));
1325       if (stream == NULL)
1326         {
1327           if (errno != ENOTDIR
1328               && ((errfunc != NULL && (*errfunc) (directory, errno))
1329                   || (flags & GLOB_ERR)))
1330             return GLOB_ABORTED;
1331         }
1332       else
1333         {
1334 #ifdef _LIBC
1335           int dfd = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
1336                      ? -1 : dirfd ((DIR *) stream));
1337 #endif
1338           int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0)
1339                            | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)
1340 #if defined _AMIGA || defined VMS
1341                            | FNM_CASEFOLD
1342 #endif
1343                            );
1344           flags |= GLOB_MAGCHAR;
1345
1346           while (1)
1347             {
1348               const char *name;
1349               size_t len;
1350 #if defined _LIBC && !defined COMPILE_GLOB64
1351               struct dirent64 *d;
1352               union
1353                 {
1354                   struct dirent64 d64;
1355                   char room [offsetof (struct dirent64, d_name[0])
1356                              + NAME_MAX + 1];
1357                 }
1358               d64buf;
1359
1360               if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0))
1361                 {
1362                   struct dirent *d32 = (*pglob->gl_readdir) (stream);
1363                   if (d32 != NULL)
1364                     {
1365                       CONVERT_DIRENT_DIRENT64 (&d64buf.d64, d32);
1366                       d = &d64buf.d64;
1367                     }
1368                   else
1369                     d = NULL;
1370                 }
1371               else
1372                 d = __readdir64 (stream);
1373 #else
1374               struct dirent *d = (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0)
1375                                   ? ((struct dirent *)
1376                                      (*pglob->gl_readdir) (stream))
1377                                   : __readdir (stream));
1378 #endif
1379               if (d == NULL)
1380                 break;
1381               if (! REAL_DIR_ENTRY (d))
1382                 continue;
1383
1384               /* If we shall match only directories use the information
1385                  provided by the dirent call if possible.  */
1386               if ((flags & GLOB_ONLYDIR) && !DIRENT_MIGHT_BE_DIR (d))
1387                 continue;
1388
1389               name = d->d_name;
1390
1391               if (fnmatch (pattern, name, fnm_flags) == 0)
1392                 {
1393                   /* If the file we found is a symlink we have to
1394                      make sure the target file exists.  */
1395                   if (!DIRENT_MIGHT_BE_SYMLINK (d)
1396                       || link_exists_p (dfd, directory, dirlen, name, pglob,
1397                                         flags))
1398                     {
1399                       if (cur == names->count)
1400                         {
1401                           struct globnames *newnames;
1402                           size_t count = names->count * 2;
1403                           size_t size = (sizeof (struct globnames)
1404                                          + ((count - INITIAL_COUNT)
1405                                             * sizeof (char *)));
1406                           allocasize += size;
1407                           if (__libc_use_alloca (allocasize))
1408                             newnames = names_alloca = __alloca (size);
1409                           else if ((newnames = malloc (size))
1410                                    == NULL)
1411                             goto memory_error;
1412                           newnames->count = count;
1413                           newnames->next = names;
1414                           names = newnames;
1415                           cur = 0;
1416                         }
1417                       len = NAMLEN (d);
1418                       names->name[cur] = (char *) malloc (len + 1);
1419                       if (names->name[cur] == NULL)
1420                         goto memory_error;
1421                       *((char *) mempcpy (names->name[cur++], name, len))
1422                         = '\0';
1423                       ++nfound;
1424                     }
1425                 }
1426             }
1427         }
1428     }
1429
1430   if (nfound == 0 && (flags & GLOB_NOCHECK))
1431     {
1432       size_t len = strlen (pattern);
1433       nfound = 1;
1434       names->name[cur] = (char *) malloc (len + 1);
1435       if (names->name[cur] == NULL)
1436         goto memory_error;
1437       *((char *) mempcpy (names->name[cur++], pattern, len)) = '\0';
1438     }
1439
1440   int result = GLOB_NOMATCH;
1441   if (nfound != 0)
1442     {
1443       result = 0;
1444
1445       char **new_gl_pathv;
1446       new_gl_pathv
1447         = (char **) realloc (pglob->gl_pathv,
1448                              (pglob->gl_pathc + pglob->gl_offs + nfound + 1)
1449                              * sizeof (char *));
1450       if (new_gl_pathv == NULL)
1451         {
1452         memory_error:
1453           while (1)
1454             {
1455               struct globnames *old = names;
1456               for (size_t i = 0; i < cur; ++i)
1457                 free (names->name[i]);
1458               names = names->next;
1459               /* NB: we will not leak memory here if we exit without
1460                  freeing the current block assigned to OLD.  At least
1461                  the very first block is always allocated on the stack
1462                  and this is the block assigned to OLD here.  */
1463               if (names == NULL)
1464                 {
1465                   assert (old == &init_names);
1466                   break;
1467                 }
1468               cur = names->count;
1469               if (old == names_alloca)
1470                 names_alloca = names;
1471               else
1472                 free (old);
1473             }
1474           result = GLOB_NOSPACE;
1475         }
1476       else
1477         {
1478           while (1)
1479             {
1480               struct globnames *old = names;
1481               for (size_t i = 0; i < cur; ++i)
1482                 new_gl_pathv[pglob->gl_offs + pglob->gl_pathc++]
1483                   = names->name[i];
1484               names = names->next;
1485               /* NB: we will not leak memory here if we exit without
1486                  freeing the current block assigned to OLD.  At least
1487                  the very first block is always allocated on the stack
1488                  and this is the block assigned to OLD here.  */
1489               if (names == NULL)
1490                 {
1491                   assert (old == &init_names);
1492                   break;
1493                 }
1494               cur = names->count;
1495               if (old == names_alloca)
1496                 names_alloca = names;
1497               else
1498                 free (old);
1499             }
1500
1501           pglob->gl_pathv = new_gl_pathv;
1502
1503           pglob->gl_pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
1504
1505           pglob->gl_flags = flags;
1506         }
1507     }
1508
1509   if (stream != NULL)
1510     {
1511       save = errno;
1512       if (__builtin_expect (flags & GLOB_ALTDIRFUNC, 0))
1513         (*pglob->gl_closedir) (stream);
1514       else
1515         closedir (stream);
1516       __set_errno (save);
1517     }
1518
1519   return result;
1520 }