about summary refs log tree commit diff
path: root/sysdeps/generic/glob.c
blob: f54c3b3d212cf5d54a01d1339e26a94c7881fd07 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
/* Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/* AIX requires this to be the first thing in the file.  */
#if defined _AIX && !defined __GNUC__
 #pragma alloca
#endif

#ifdef	HAVE_CONFIG_H
# include <config.h>
#endif

/* Enable GNU extensions in glob.h.  */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE	1
#endif

#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>

/* Outcomment the following line for production quality code.  */
/* #define NDEBUG 1 */
#include <assert.h>

#include <stdio.h>		/* Needed on stupid SunOS for assert.  */


/* Comment out all this code if we are using the GNU C Library, and are not
   actually compiling the library itself.  This code is part of the GNU C
   Library, but also included in many other GNU distributions.  Compiling
   and linking in this code is a waste when using the GNU C library
   (especially if it is a shared library).  Rather than having every GNU
   program understand `configure --with-gnu-libc' and omit the object files,
   it is simpler to just do this in the source for each such file.  */

#define GLOB_INTERFACE_VERSION 1
#if !defined _LIBC && defined __GNU_LIBRARY__ && __GNU_LIBRARY__ > 1
# include <gnu-versions.h>
# if _GNU_GLOB_INTERFACE_VERSION == GLOB_INTERFACE_VERSION
#  define ELIDE_CODE
# endif
#endif

#ifndef ELIDE_CODE

#if defined STDC_HEADERS || defined __GNU_LIBRARY__
# include <stddef.h>
#endif

#if defined HAVE_UNISTD_H || defined _LIBC
# include <unistd.h>
# ifndef POSIX
#  ifdef _POSIX_VERSION
#   define POSIX
#  endif
# endif
#endif

#if !defined _AMIGA && !defined VMS && !defined WINDOWS32
# include <pwd.h>
#endif

#if !defined __GNU_LIBRARY__ && !defined STDC_HEADERS
extern int errno;
#endif
#ifndef __set_errno
# define __set_errno(val) errno = (val)
#endif

#ifndef	NULL
# define NULL	0
#endif


#if defined HAVE_DIRENT_H || defined __GNU_LIBRARY__
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# ifdef HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif
# ifdef HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif
# ifdef HAVE_NDIR_H
#  include <ndir.h>
# endif
# ifdef HAVE_VMSDIR_H
#  include "vmsdir.h"
# endif /* HAVE_VMSDIR_H */
#endif


/* In GNU systems, <dirent.h> defines this macro for us.  */
#ifdef _D_NAMLEN
# undef NAMLEN
# define NAMLEN(d) _D_NAMLEN(d)
#endif

/* When used in the GNU libc the symbol _DIRENT_HAVE_D_TYPE is available
   if the `d_type' member for `struct dirent' is available.  */
#ifdef _DIRENT_HAVE_D_TYPE
# define HAVE_D_TYPE	1
#endif


#if (defined POSIX || defined WINDOWS32) && !defined __GNU_LIBRARY__
/* Posix does not require that the d_ino field be present, and some
   systems do not provide it. */
# define REAL_DIR_ENTRY(dp) 1
#else
# define REAL_DIR_ENTRY(dp) (dp->d_ino != 0)
#endif /* POSIX */

#if defined STDC_HEADERS || defined __GNU_LIBRARY__
# include <stdlib.h>
# include <string.h>
# define	ANSI_STRING
#else	/* No standard headers.  */

extern char *getenv ();

# ifdef HAVE_STRING_H
#  include <string.h>
#  define ANSI_STRING
# else
#  include <strings.h>
# endif
# ifdef	HAVE_MEMORY_H
#  include <memory.h>
# endif

extern char *malloc (), *realloc ();
extern void free ();

extern void qsort ();
extern void abort (), exit ();

#endif	/* Standard headers.  */

#ifndef	ANSI_STRING

# ifndef bzero
extern void bzero ();
# endif
# ifndef bcopy
extern void bcopy ();
# endif

# define memcpy(d, s, n)	bcopy ((s), (d), (n))
# define strrchr	rindex
/* memset is only used for zero here, but let's be paranoid.  */
# define memset(s, better_be_zero, n) \
  ((void) ((better_be_zero) == 0 ? (bzero((s), (n)), 0) : (abort(), 0)))
#endif	/* Not ANSI_STRING.  */

#if !defined HAVE_STRCOLL && !defined _LIBC
# define strcoll	strcmp
#endif

#if !defined HAVE_MEMPCPY && __GLIBC__ - 0 == 2 && __GLIBC_MINOR__ >= 1
# define HAVE_MEMPCPY	1
# define mempcpy(Dest, Src, Len) __mempcpy (Dest, Src, Len)
#endif


#ifndef	__GNU_LIBRARY__
# ifdef	__GNUC__
__inline
# endif
# ifndef __SASC
#  ifdef WINDOWS32
static void *
#  else
static char *
# endif
my_realloc (p, n)
     char *p;
     unsigned int n;
{
  /* These casts are the for sake of the broken Ultrix compiler,
     which warns of illegal pointer combinations otherwise.  */
  if (p == NULL)
    return (char *) malloc (n);
  return (char *) realloc (p, n);
}
# define	realloc	my_realloc
# endif /* __SASC */
#endif /* __GNU_LIBRARY__ */


#if !defined __alloca && !defined __GNU_LIBRARY__

# ifdef	__GNUC__
#  undef alloca
#  define alloca(n)	__builtin_alloca (n)
# else	/* Not GCC.  */
#  ifdef HAVE_ALLOCA_H
#   include <alloca.h>
#  else	/* Not HAVE_ALLOCA_H.  */
#   ifndef _AIX
#    ifdef WINDOWS32
#     include <malloc.h>
#    else
extern char *alloca ();
#    endif /* WINDOWS32 */
#   endif /* Not _AIX.  */
#  endif /* sparc or HAVE_ALLOCA_H.  */
# endif	/* GCC.  */

# define __alloca	alloca

#endif

#ifndef __GNU_LIBRARY__
# define __stat stat
# ifdef STAT_MACROS_BROKEN
#  undef S_ISDIR
# endif
# ifndef S_ISDIR
#  define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
# endif
#endif

#ifdef _LIBC
# define strdup(str) __strdup (str)
# define sysconf(id) __sysconf (id)
# define closedir(dir) __closedir (dir)
# define opendir(name) __opendir (name)
# define readdir(str) __readdir (str)
#endif

#if !(defined STDC_HEADERS || defined __GNU_LIBRARY__)
# undef	size_t
# define size_t	unsigned int
#endif

/* Some system header files erroneously define these.
   We want our own definitions from <fnmatch.h> to take precedence.  */
#ifndef __GNU_LIBRARY__
# undef	FNM_PATHNAME
# undef	FNM_NOESCAPE
# undef	FNM_PERIOD
#endif
#include <fnmatch.h>

/* Some system header files erroneously define these.
   We want our own definitions from <glob.h> to take precedence.  */
#ifndef __GNU_LIBRARY__
# undef	GLOB_ERR
# undef	GLOB_MARK
# undef	GLOB_NOSORT
# undef	GLOB_DOOFFS
# undef	GLOB_NOCHECK
# undef	GLOB_APPEND
# undef	GLOB_NOESCAPE
# undef	GLOB_PERIOD
#endif
#include <glob.h>

static
#if __GNUC__ - 0 >= 2
inline
#endif
const char *next_brace_sub __P ((const char *begin));
static int glob_in_dir __P ((const char *pattern, const char *directory,
			     int flags,
			     int (*errfunc) __P ((const char *, int)),
			     glob_t *pglob));
static int prefix_array __P ((const char *prefix, char **array, size_t n));
static int collated_compare __P ((const __ptr_t, const __ptr_t));


/* Find the end of the sub-pattern in a brace expression.  We define
   this as an inline function if the compiler permits.  */
static
#if __GNUC__ - 0 >= 2
inline
#endif
const char *
next_brace_sub (begin)
     const char *begin;
{
  unsigned int depth = 0;
  const char *cp = begin;

  while (1)
    {
      if (depth == 0)
	{
	  if (*cp != ',' && *cp != '}' && *cp != '\0')
	    {
	      if (*cp == '{')
		++depth;
	      ++cp;
	      continue;
	    }
	}
      else
	{
	  while (*cp != '\0' && (*cp != '}' || depth > 0))
	    {
	      if (*cp == '}')
		--depth;
	      ++cp;
	    }
	  if (*cp == '\0')
	    /* An incorrectly terminated brace expression.  */
	    return NULL;

	  continue;
	}
      break;
    }

  return cp;
}

/* Do glob searching for PATTERN, placing results in PGLOB.
   The bits defined above may be set in FLAGS.
   If a directory cannot be opened or read and ERRFUNC is not nil,
   it is called with the pathname that caused the error, and the
   `errno' value from the failing call; if it returns non-zero
   `glob' returns GLOB_ABORTED; if it returns zero, the error is ignored.
   If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned.
   Otherwise, `glob' returns zero.  */
int
glob (pattern, flags, errfunc, pglob)
     const char *pattern;
     int flags;
     int (*errfunc) __P ((const char *, int));
     glob_t *pglob;
{
  const char *filename;
  char *dirname;
  size_t dirlen;
  int status;
  int oldcount;

  if (pattern == NULL || pglob == NULL || (flags & ~__GLOB_FLAGS) != 0)
    {
      __set_errno (EINVAL);
      return -1;
    }

  if (flags & GLOB_BRACE)
    {
      const char *begin = strchr (pattern, '{');
      if (begin != NULL)
	{
	  /* Allocate working buffer large enough for our work.  Note that
	    we have at least an opening and closing brace.  */
	  int firstc;
	  char *alt_start;
	  const char *p;
	  const char *next;
	  const char *rest;
	  size_t rest_len;
#ifdef __GNUC__
	  char onealt[strlen (pattern) - 1];
#else
	  char *onealt = (char *) malloc (strlen (pattern) - 1);
	  if (onealt == NULL)
	    {
	      if (!(flags & GLOB_APPEND))
		globfree (pglob);
	      return GLOB_NOSPACE;
	    }
#endif

	  /* We know the prefix for all sub-patterns.  */
#ifdef HAVE_MEMPCPY
	  alt_start = mempcpy (onealt, pattern, begin - pattern);
#else
	  memcpy (onealt, pattern, begin - pattern);
	  alt_start = &onealt[begin - pattern];
#endif

	  /* Find the first sub-pattern and at the same time find the
	     rest after the closing brace.  */
	  next = next_brace_sub (begin + 1);
	  if (next == NULL)
	    {
	      /* It is an illegal expression.  */
#ifndef __GNUC__
	      free (onealt);
#endif
	      return glob (pattern, flags & ~GLOB_BRACE, errfunc, pglob);
	    }

	  /* Now find the end of the whole brace expression.  */
	  rest = next;
	  while (*rest != '}')
	    {
	      rest = next_brace_sub (rest + 1);
	      if (rest == NULL)
		{
		  /* It is an illegal expression.  */
#ifndef __GNUC__
		  free (onealt);
#endif
		  return glob (pattern, flags & ~GLOB_BRACE, errfunc, pglob);
		}
	    }
	  /* Please note that we now can be sure the brace expression
	     is well-formed.  */
	  rest_len = strlen (++rest) + 1;

	  /* We have a brace expression.  BEGIN points to the opening {,
	     NEXT points past the terminator of the first element, and END
	     points past the final }.  We will accumulate result names from
	     recursive runs for each brace alternative in the buffer using
	     GLOB_APPEND.  */

	  if (!(flags & GLOB_APPEND))
	    {
	      /* This call is to set a new vector, so clear out the
		 vector so we can append to it.  */
	      pglob->gl_pathc = 0;
	      pglob->gl_pathv = NULL;
	    }
	  firstc = pglob->gl_pathc;

	  p = begin + 1;
	  while (1)
	    {
	      int result;

	      /* Construct the new glob expression.  */
#ifdef HAVE_MEMPCPY
	      mempcpy (mempcpy (alt_start, p, next - p), rest, rest_len);
#else
	      memcpy (alt_start, p, next - p);
	      memcpy (&alt_start[next - p], rest, rest_len);
#endif

	      result = glob (onealt,
			     ((flags & ~(GLOB_NOCHECK|GLOB_NOMAGIC))
			      | GLOB_APPEND), errfunc, pglob);

	      /* If we got an error, return it.  */
	      if (result && result != GLOB_NOMATCH)
		{
#ifndef __GNUC__
		  free (onealt);
#endif
		  if (!(flags & GLOB_APPEND))
		    globfree (pglob);
		  return result;
		}

	      if (*next == '}')
		/* We saw the last entry.  */
		break;

	      p = next + 1;
	      next = next_brace_sub (p);
	      assert (next != NULL);
	    }

#ifndef __GNUC__
	  free (onealt);
#endif

	  if (pglob->gl_pathc != firstc)
	    /* We found some entries.  */
	    return 0;
	  else if (!(flags & (GLOB_NOCHECK|GLOB_NOMAGIC)))
	    return GLOB_NOMATCH;
	}
    }

  /* Find the filename.  */
  filename = strrchr (pattern, '/');
  if (filename == NULL)
    {
      /* This can mean two things: a simple name or "~name".  The later
	 case is nothing but a notation for a directory.  */
      if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && pattern[0] == '~')
	{
	  dirname = (char *) pattern;
	  dirlen = strlen (pattern);

	  /* Set FILENAME to NULL as a special flag.  This is ugly but
	     other solutions would requiremuch more code.  We test for
	     this special case below.  */
	  filename = NULL;
	}
      else
	{
	  filename = pattern;
#ifdef _AMIGA
	  dirname = (char *) "";
#else
	  dirname = (char *) ".";
#endif
	  dirlen = 0;
	}
    }
  else if (filename == pattern)
    {
      /* "/pattern".  */
      dirname = (char *) "/";
      dirlen = 1;
      ++filename;
    }
  else
    {
      dirlen = filename - pattern;
      dirname = (char *) __alloca (dirlen + 1);
#ifdef HAVE_MEMPCPY
      *((char *) mempcpy (dirname, pattern, dirlen)) = '\0';
#else
      memcpy (dirname, pattern, dirlen);
      dirname[dirlen] = '\0';
#endif
      ++filename;

      if (filename[0] == '\0' && dirlen > 1)
	/* "pattern/".  Expand "pattern", appending slashes.  */
	{
	  int val = glob (dirname, flags | GLOB_MARK, errfunc, pglob);
	  if (val == 0)
	    pglob->gl_flags = ((pglob->gl_flags & ~GLOB_MARK)
			       | (flags & GLOB_MARK));
	  return val;
	}
    }

  if (!(flags & GLOB_APPEND))
    {
      pglob->gl_pathc = 0;
      pglob->gl_pathv = NULL;
    }

  oldcount = pglob->gl_pathc;

#ifndef VMS
  if ((flags & (GLOB_TILDE|GLOB_TILDE_CHECK)) && dirname[0] == '~')
    {
      if (dirname[1] == '\0' || dirname[1] == '/')
	{
	  /* Look up home directory.  */
	  char *home_dir = getenv ("HOME");
# ifdef _AMIGA
	  if (home_dir == NULL || home_dir[0] == '\0')
	    home_dir = "SYS:";
# else
#  ifdef WINDOWS32
	  if (home_dir == NULL || home_dir[0] == '\0')
            home_dir = "c:/users/default"; /* poor default */
#  else
	  if (home_dir == NULL || home_dir[0] == '\0')
	    {
	      int success;
#   if defined HAVE_GETLOGIN_R || defined _LIBC
	      extern int getlogin_r __P ((char *, size_t));
	      size_t buflen = sysconf (_SC_LOGIN_NAME_MAX) + 1;
	      char *name;

	      if (buflen == 0)
		/* `sysconf' does not support _SC_LOGIN_NAME_MAX.  Try
		   a moderate value.  */
		buflen = 16;
	      name = (char *) __alloca (buflen);

	      success = getlogin_r (name, buflen) >= 0;
#   else
	      extern char *getlogin __P ((void));
	      char *name;

	      success = (name = getlogin ()) != NULL;
#   endif
	      if (success)
		{
#   if defined HAVE_GETPWNAM_R || defined _LIBC
		  size_t pwbuflen = sysconf (_SC_GETPW_R_SIZE_MAX);
		  char *pwtmpbuf;
		  struct passwd pwbuf, *p;

		  pwtmpbuf = (char *) __alloca (pwbuflen);

		  success = (__getpwnam_r (name, &pwbuf, pwtmpbuf,
					   pwbuflen, &p) >= 0);
#   else
		  struct passwd *p = getpwnam (name);
		  success = p != NULL;
#   endif
		  if (success)
		    home_dir = p->pw_dir;
		}
	    }
	  if (home_dir == NULL || home_dir[0] == '\0')
	    if (flags & GLOB_TILDE_CHECK)
	      return GLOB_NOMATCH;
	    else
	      home_dir = (char *) "~"; /* No luck.  */
#  endif /* WINDOWS32 */
# endif
	  /* Now construct the full directory.  */
	  if (dirname[1] == '\0')
	    dirname = home_dir;
	  else
	    {
	      char *newp;
	      size_t home_len = strlen (home_dir);
	      newp = (char *) __alloca (home_len + dirlen);
# ifdef HAVE_MEMPCPY
	      mempcpy (mempcpy (newp, home_dir, home_len),
		       &dirname[1], dirlen);
# else
	      memcpy (newp, home_dir, home_len);
	      memcpy (&newp[home_len], &dirname[1], dirlen);
# endif
	      dirname = newp;
	    }
	}
# if !defined _AMIGA && !defined WINDOWS32
      else
	{
	  char *end_name = strchr (dirname, '/');
	  char *user_name;
	  char *home_dir;

	  if (end_name == NULL)
	    user_name = dirname + 1;
	  else
	    {
	      user_name = (char *) __alloca (end_name - dirname);
# ifdef HAVE_MEMPCPY
	      *((char *) mempcpy (user_name, dirname + 1, end_name - dirname))
		= '\0';
# else
	      memcpy (user_name, dirname + 1, end_name - dirname);
	      user_name[end_name - dirname - 1] = '\0';
# endif
	    }

	  /* Look up specific user's home directory.  */
	  {
#  if defined HAVE_GETPWNAM_R || defined _LIBC
	    size_t buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
	    char *pwtmpbuf = (char *) __alloca (buflen);
	    struct passwd pwbuf, *p;
	    if (__getpwnam_r (user_name, &pwbuf, pwtmpbuf, buflen, &p) >= 0)
	      home_dir = p->pw_dir;
	    else
	      home_dir = NULL;
#  else
	    struct passwd *p = getpwnam (user_name);
	    if (p != NULL)
	      home_dir = p->pw_dir;
	    else
	      home_dir = NULL;
#  endif
	  }
	  /* If we found a home directory use this.  */
	  if (home_dir != NULL)
	    {
	      char *newp;
	      size_t home_len = strlen (home_dir);
	      size_t rest_len = end_name == NULL ? 0 : strlen (end_name);
	      newp = (char *) __alloca (home_len + rest_len + 1);
#  ifdef HAVE_MEMPCPY
	      *((char *) mempcpy (mempcpy (newp, home_dir, home_len),
				  end_name, rest_len)) = '\0';
#  else
	      memcpy (newp, home_dir, home_len);
	      memcpy (&newp[home_len], end_name, rest_len);
	      newp[home_len + rest_len] = '\0';
#  endif
	      dirname = newp;
	    }
	  else
	    if (flags & GLOB_TILDE_CHECK)
	      /* We have to regard it as an error if we cannot find the
		 home directory.  */
	      return GLOB_NOMATCH;
	}
# endif	/* Not Amiga && not WINDOWS32.  */
    }
#endif	/* Not VMS.  */

  /* Now test whether we looked for "~" or "~NAME".  In this case we
     can give the answer now.  */
  if (filename == NULL)
    {
      struct stat st;

      /* Return the directory if we don't check for error or if it exists.  */
      if ((flags & GLOB_NOCHECK)
	  || (((flags & GLOB_ALTDIRFUNC)
	       ? (*pglob->gl_stat) (dirname, &st)
	       : __stat (dirname, &st)) == 0
	      && S_ISDIR (st.st_mode)))
	{
	  pglob->gl_pathv
	    = (char **) realloc (pglob->gl_pathv,
				 (pglob->gl_pathc +
				  ((flags & GLOB_DOOFFS) ?
				   pglob->gl_offs : 0) +
				  1 + 1) *
				 sizeof (char *));
	  if (pglob->gl_pathv == NULL)
	    return GLOB_NOSPACE;

	  if (flags & GLOB_DOOFFS)
	    while (pglob->gl_pathc < pglob->gl_offs)
	      pglob->gl_pathv[pglob->gl_pathc++] = NULL;

#if defined HAVE_STRDUP || defined _LIBC
	  pglob->gl_pathv[pglob->gl_pathc] = strdup (dirname);
#else
	  {
	    size_t len = strlen (dirname) + 1;
	    char *dircopy = malloc (len);
	    if (dircopy != NULL)
	      pglob->gl_pathv[pglob->gl_pathc] = memcpy (dircopy, dirname,
							 len);
	  }
#endif
	  if (pglob->gl_pathv[pglob->gl_pathc] == NULL)
	    {
	      free (pglob->gl_pathv);
	      return GLOB_NOSPACE;
	    }
	  pglob->gl_pathv[++pglob->gl_pathc] = NULL;
	  pglob->gl_flags = flags;

	  return 0;
	}

      /* Not found.  */
      return GLOB_NOMATCH;
    }

  if (__glob_pattern_p (dirname, !(flags & GLOB_NOESCAPE)))
    {
      /* The directory name contains metacharacters, so we
	 have to glob for the directory, and then glob for
	 the pattern in each directory found.  */
      glob_t dirs;
      register int i;

      status = glob (dirname,
		     ((flags & (GLOB_ERR | GLOB_NOCHECK | GLOB_NOESCAPE))
		      | GLOB_NOSORT | GLOB_ONLYDIR),
		     errfunc, &dirs);
      if (status != 0)
	return status;

      /* We have successfully globbed the preceding directory name.
	 For each name we found, call glob_in_dir on it and FILENAME,
	 appending the results to PGLOB.  */
      for (i = 0; i < dirs.gl_pathc; ++i)
	{
	  int old_pathc;

#ifdef	SHELL
	  {
	    /* Make globbing interruptible in the bash shell. */
	    extern int interrupt_state;

	    if (interrupt_state)
	      {
		globfree (&dirs);
		globfree (&files);
		return GLOB_ABORTED;
	      }
	  }
#endif /* SHELL.  */

	  old_pathc = pglob->gl_pathc;
	  status = glob_in_dir (filename, dirs.gl_pathv[i],
				((flags | GLOB_APPEND)
				 & ~(GLOB_NOCHECK | GLOB_ERR)),
				errfunc, pglob);
	  if (status == GLOB_NOMATCH)
	    /* No matches in this directory.  Try the next.  */
	    continue;

	  if (status != 0)
	    {
	      globfree (&dirs);
	      globfree (pglob);
	      return status;
	    }

	  /* Stick the directory on the front of each name.  */
	  if (prefix_array (dirs.gl_pathv[i],
			    &pglob->gl_pathv[old_pathc],
			    pglob->gl_pathc - old_pathc))
	    {
	      globfree (&dirs);
	      globfree (pglob);
	      return GLOB_NOSPACE;
	    }
	}

      flags |= GLOB_MAGCHAR;

      /* We have ignored the GLOB_NOCHECK flag in the `glob_in_dir' calls.
	 But if we have not found any matching entry and thie GLOB_NOCHECK
	 flag was set we must return the list consisting of the disrectory
	 names followed by the filename.  */
      if (pglob->gl_pathc == oldcount)
	/* No matches.  */
	if (flags & GLOB_NOCHECK)
	  {
	    size_t filename_len = strlen (filename) + 1;
	    char **new_pathv;
	    struct stat st;

	    /* This is an pessimistic guess about the size.  */
	    pglob->gl_pathv
	      = (char **) realloc (pglob->gl_pathv,
				   (pglob->gl_pathc +
				    ((flags & GLOB_DOOFFS) ?
				     pglob->gl_offs : 0) +
				    dirs.gl_pathc + 1) *
				   sizeof (char *));
	    if (pglob->gl_pathv == NULL)
	      {
		globfree (&dirs);
		return GLOB_NOSPACE;
	      }

	    if (flags & GLOB_DOOFFS)
	      while (pglob->gl_pathc < pglob->gl_offs)
		pglob->gl_pathv[pglob->gl_pathc++] = NULL;

	    for (i = 0; i < dirs.gl_pathc; ++i)
	      {
		const char *dir = dirs.gl_pathv[i];
		size_t dir_len = strlen (dir);

		/* First check whether this really is a directory.  */
		if (((flags & GLOB_ALTDIRFUNC)
		     ? (*pglob->gl_stat) (dir, &st) : __stat (dir, &st)) != 0
		    || !S_ISDIR (st.st_mode))
		  /* No directory, ignore this entry.  */
		  continue;

		pglob->gl_pathv[pglob->gl_pathc] = malloc (dir_len + 1
							   + filename_len);
		if (pglob->gl_pathv[pglob->gl_pathc] == NULL)
		  {
		    globfree (&dirs);
		    globfree (pglob);
		    return GLOB_NOSPACE;
		  }

#ifdef HAVE_MEMPCPY
		mempcpy (mempcpy (mempcpy (pglob->gl_pathv[pglob->gl_pathc],
					   dir, dir_len),
				  "/", 1),
			 filename, filename_len);
#else
		memcpy (pglob->gl_pathv[pglob->gl_pathc], dir, dir_len);
		pglob->gl_pathv[pglob->gl_pathc][dir_len] = '/';
		memcpy (&pglob->gl_pathv[pglob->gl_pathc][dir_len + 1],
			filename, filename_len);
#endif
		++pglob->gl_pathc;
	      }

	    pglob->gl_pathv[pglob->gl_pathc] = NULL;
	    pglob->gl_flags = flags;

	    /* Now we know how large the gl_pathv vector must be.  */
	    new_pathv = realloc (pglob->gl_pathv,
				 (pglob->gl_pathc + 1) * sizeof (char *));
	    if (new_pathv != NULL)
	      pglob->gl_pathv = new_pathv;
	  }
	else
	  return GLOB_NOMATCH;

      globfree (&dirs);
    }
  else
    {
      status = glob_in_dir (filename, dirname, flags, errfunc, pglob);
      if (status != 0)
	return status;

      if (dirlen > 0)
	{
	  /* Stick the directory on the front of each name.  */
	  int ignore = oldcount;

	  if ((flags & GLOB_DOOFFS) && ignore < pglob->gl_offs)
	    ignore = pglob->gl_offs;

	  if (prefix_array (dirname,
			    &pglob->gl_pathv[ignore],
			    pglob->gl_pathc - ignore))
	    {
	      globfree (pglob);
	      return GLOB_NOSPACE;
	    }
	}
    }

  if (flags & GLOB_MARK)
    {
      /* Append slashes to directory names.  */
      int i;
      struct stat st;
      for (i = oldcount; i < pglob->gl_pathc; ++i)
	if (((flags & GLOB_ALTDIRFUNC)
	     ? (*pglob->gl_stat) (pglob->gl_pathv[i], &st)
	     : __stat (pglob->gl_pathv[i], &st)) == 0
	    && S_ISDIR (st.st_mode))
	  {
 	    size_t len = strlen (pglob->gl_pathv[i]) + 2;
	    char *new = realloc (pglob->gl_pathv[i], len);
 	    if (new == NULL)
	      {
		globfree (pglob);
		return GLOB_NOSPACE;
	      }
	    strcpy (&new[len - 2], "/");
	    pglob->gl_pathv[i] = new;
	  }
    }

  if (!(flags & GLOB_NOSORT))
    {
      /* Sort the vector.  */
      int non_sort = oldcount;

      if ((flags & GLOB_DOOFFS) && pglob->gl_offs > oldcount)
	non_sort = pglob->gl_offs;

      qsort ((__ptr_t) &pglob->gl_pathv[non_sort],
	     pglob->gl_pathc - non_sort,
	     sizeof (char *), collated_compare);
    }

  return 0;
}


/* Free storage allocated in PGLOB by a previous `glob' call.  */
void
globfree (pglob)
     register glob_t *pglob;
{
  if (pglob->gl_pathv != NULL)
    {
      register int i;
      for (i = 0; i < pglob->gl_pathc; ++i)
	if (pglob->gl_pathv[i] != NULL)
	  free ((__ptr_t) pglob->gl_pathv[i]);
      free ((__ptr_t) pglob->gl_pathv);
    }
}


/* Do a collated comparison of A and B.  */
static int
collated_compare (a, b)
     const __ptr_t a;
     const __ptr_t b;
{
  const char *const s1 = *(const char *const * const) a;
  const char *const s2 = *(const char *const * const) b;

  if (s1 == s2)
    return 0;
  if (s1 == NULL)
    return 1;
  if (s2 == NULL)
    return -1;
  return strcoll (s1, s2);
}


/* Prepend DIRNAME to each of N members of ARRAY, replacing ARRAY's
   elements in place.  Return nonzero if out of memory, zero if successful.
   A slash is inserted between DIRNAME and each elt of ARRAY,
   unless DIRNAME is just "/".  Each old element of ARRAY is freed.  */
static int
prefix_array (dirname, array, n)
     const char *dirname;
     char **array;
     size_t n;
{
  register size_t i;
  size_t dirlen = strlen (dirname);

  if (dirlen == 1 && dirname[0] == '/')
    /* DIRNAME is just "/", so normal prepending would get us "//foo".
       We want "/foo" instead, so don't prepend any chars from DIRNAME.  */
    dirlen = 0;

  for (i = 0; i < n; ++i)
    {
      size_t eltlen = strlen (array[i]) + 1;
      char *new = (char *) malloc (dirlen + 1 + eltlen);
      if (new == NULL)
	{
	  while (i > 0)
	    free ((__ptr_t) array[--i]);
	  return 1;
	}

#ifdef HAVE_MEMPCPY
      {
	char *endp = (char *) mempcpy (new, dirname, dirlen);
	*endp++ = '/';
	mempcpy (endp, array[i], eltlen);
      }
#else
      memcpy (new, dirname, dirlen);
      new[dirlen] = '/';
      memcpy (&new[dirlen + 1], array[i], eltlen);
#endif
      free ((__ptr_t) array[i]);
      array[i] = new;
    }

  return 0;
}


/* Return nonzero if PATTERN contains any metacharacters.
   Metacharacters can be quoted with backslashes if QUOTE is nonzero.  */
int
__glob_pattern_p (pattern, quote)
     const char *pattern;
     int quote;
{
  register const char *p;
  int open = 0;

  for (p = pattern; *p != '\0'; ++p)
    switch (*p)
      {
      case '?':
      case '*':
	return 1;

      case '\\':
	if (quote && p[1] != '\0')
	  ++p;
	break;

      case '[':
	open = 1;
	break;

      case ']':
	if (open)
	  return 1;
	break;
      }

  return 0;
}
#ifdef _LIBC
weak_alias (__glob_pattern_p, glob_pattern_p)
#endif


/* Like `glob', but PATTERN is a final pathname component,
   and matches are searched for in DIRECTORY.
   The GLOB_NOSORT bit in FLAGS is ignored.  No sorting is ever done.
   The GLOB_APPEND flag is assumed to be set (always appends).  */
static int
glob_in_dir (pattern, directory, flags, errfunc, pglob)
     const char *pattern;
     const char *directory;
     int flags;
     int (*errfunc) __P ((const char *, int));
     glob_t *pglob;
{
  __ptr_t stream = NULL;

  struct globlink
    {
      struct globlink *next;
      char *name;
    };
  struct globlink *names = NULL;
  size_t nfound;
  int meta;
  int save;

  meta = __glob_pattern_p (pattern, !(flags & GLOB_NOESCAPE));
  if (meta == 0)
    {
      if (flags & (GLOB_NOCHECK|GLOB_NOMAGIC))
	/* We need not do any tests.  The PATTERN contains no meta
	   characters and we must not return an error therefore the
	   result will always contain exactly the one name.  */
	flags |= GLOB_NOCHECK;
      else
	{
	  /* Since we use the normal file functions we can also use stat()
	     to verify the file is there.  */
	  struct stat st;
	  size_t patlen = strlen (pattern);
	  size_t dirlen = strlen (directory);
	  char *fullname = __alloca (dirlen + 1 + patlen + 1);

# ifdef HAVE_MEMPCPY
	  mempcpy (mempcpy (mempcpy (fullname, directory, dirlen),
			    "/", 1),
		   pattern, patlen + 1);
# else
	  memcpy (fullname, directory, dirlen);
	  fullname[dirlen] = '/';
	  memcpy (&fullname[dirlen + 1], pattern, patlen + 1);
# endif
	  if (((flags & GLOB_ALTDIRFUNC)
	       ? (*pglob->gl_stat) (fullname, &st)
	       : __stat (fullname, &st)) == 0)
	    /* We found this file to be existing.  No tell the rest
	       of the function to copy this name into the result.  */
	    flags |= GLOB_NOCHECK;
	}

      nfound = 0;
    }
  else
    {
      if (pattern[0] == '\0')
	{
	  /* This is a special case for matching directories like in
	     "*a/".  */
	  names = (struct globlink *) __alloca (sizeof (struct globlink));
	  names->name = (char *) malloc (1);
	  if (names->name == NULL)
	    goto memory_error;
	  names->name[0] = '\0';
	  names->next = NULL;
	  nfound = 1;
	  meta = 0;
	}
      else
	{
	  stream = ((flags & GLOB_ALTDIRFUNC)
		    ? (*pglob->gl_opendir) (directory)
		    : (__ptr_t) opendir (directory));
	  if (stream == NULL)
	    {
	      if ((errfunc != NULL && (*errfunc) (directory, errno))
		  || (flags & GLOB_ERR))
		return GLOB_ABORTED;
	      nfound = 0;
	      meta = 0;
	    }
	  else
	    {
	      int fnm_flags = ((!(flags & GLOB_PERIOD) ? FNM_PERIOD : 0)
			       | ((flags & GLOB_NOESCAPE) ? FNM_NOESCAPE : 0)
#if defined _AMIGA || defined VMS
				   | FNM_CASEFOLD
#endif
				   );
	      nfound = 0;
	      flags |= GLOB_MAGCHAR;

	      while (1)
		{
		  const char *name;
		  size_t len;
		  struct dirent *d = ((flags & GLOB_ALTDIRFUNC)
				      ? (*pglob->gl_readdir) (stream)
				      : readdir ((DIR *) stream));
		  if (d == NULL)
		    break;
		  if (! REAL_DIR_ENTRY (d))
		    continue;

#ifdef HAVE_D_TYPE
		  /* If we shall match only directories use the information
		     provided by the dirent call if possible.  */
		  if ((flags & GLOB_ONLYDIR)
		      && d->d_type != DT_UNKNOWN && d->d_type != DT_DIR)
		    continue;
#endif

		  name = d->d_name;

		  if (fnmatch (pattern, name, fnm_flags) == 0)
		    {
		      struct globlink *new = (struct globlink *)
			__alloca (sizeof (struct globlink));
		      len = NAMLEN (d);
		      new->name = (char *) malloc (len + 1);
		      if (new->name == NULL)
			goto memory_error;
#ifdef HAVE_MEMPCPY
		      *((char *) mempcpy ((__ptr_t) new->name, name, len))
			= '\0';
#else
		      memcpy ((__ptr_t) new->name, name, len);
		      new->name[len] = '\0';
#endif
		      new->next = names;
		      names = new;
		      ++nfound;
		    }
		}
	    }
	}
    }

  if (nfound == 0 && (flags & GLOB_NOCHECK))
    {
      size_t len = strlen (pattern);
      nfound = 1;
      names = (struct globlink *) __alloca (sizeof (struct globlink));
      names->next = NULL;
      names->name = (char *) malloc (len + 1);
      if (names->name == NULL)
	goto memory_error;
#ifdef HAVE_MEMPCPY
      *((char *) mempcpy (names->name, pattern, len)) = '\0';
#else
      memcpy (names->name, pattern, len);
      names->name[len] = '\0';
#endif
    }

  if (nfound != 0)
    {
      pglob->gl_pathv
	= (char **) realloc (pglob->gl_pathv,
			     (pglob->gl_pathc +
			      ((flags & GLOB_DOOFFS) ? pglob->gl_offs : 0) +
			      nfound + 1) *
			     sizeof (char *));
      if (pglob->gl_pathv == NULL)
	goto memory_error;

      if (flags & GLOB_DOOFFS)
	while (pglob->gl_pathc < pglob->gl_offs)
	  pglob->gl_pathv[pglob->gl_pathc++] = NULL;

      for (; names != NULL; names = names->next)
	pglob->gl_pathv[pglob->gl_pathc++] = names->name;
      pglob->gl_pathv[pglob->gl_pathc] = NULL;

      pglob->gl_flags = flags;
    }

  save = errno;
  if (stream != NULL)
    if (flags & GLOB_ALTDIRFUNC)
      (*pglob->gl_closedir) (stream);
    else
      closedir ((DIR *) stream);
  __set_errno (save);

  return nfound == 0 ? GLOB_NOMATCH : 0;

 memory_error:
  {
    int save = errno;
    if (flags & GLOB_ALTDIRFUNC)
      (*pglob->gl_closedir) (stream);
    else
      closedir ((DIR *) stream);
    __set_errno (save);
  }
  while (names != NULL)
    {
      if (names->name != NULL)
	free ((__ptr_t) names->name);
      names = names->next;
    }
  return GLOB_NOSPACE;
}

#endif	/* Not ELIDE_CODE.  */