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100644 101 lines (84 sloc) 2.526 kB
b1b799a added replacements for missing system/library calls
rtv authored
1 /* Copyright (C) 1992-1998, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
18
19 /*
20 * $Id: scandir.c,v 1.1 2002-12-05 01:50:22 rtv Exp $
21 *
22 * taken from glibc, modified slightly for standalone compilation, and used as
23 * a fallback implementation when scandir() is not available. - BPG
24 */
25
26 #include <dirent.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <errno.h>
30
31 int
32 scandir(dir, namelist, select, cmp)
33 const char *dir;
34 struct dirent ***namelist;
35 int (*select) (const struct dirent *);
36 int (*cmp) (const void *, const void *);
37 {
38 DIR *dp = opendir (dir);
39 struct dirent **v = NULL;
40 size_t vsize = 0, i;
41 struct dirent *d;
42 int save;
43
44 if (dp == NULL)
45 return -1;
46
47 save = errno;
48 errno = 0;
49
50 i = 0;
51 while ((d = readdir (dp)) != NULL)
52 if (select == NULL || (*select) (d))
53 {
54 struct dirent *vnew;
55 size_t dsize;
56
57 /* Ignore errors from select or readdir */
58 errno = 0;
59
60 if (i == vsize)
61 {
62 struct dirent **new;
63 if (vsize == 0)
64 vsize = 10;
65 else
66 vsize *= 2;
67 new = (struct dirent **) realloc (v, vsize * sizeof (*v));
68 if (new == NULL)
69 break;
70 v = new;
71 }
72
73 dsize = &d->d_name[strlen(d->d_name)+1] - (char *) d;
74 vnew = (struct dirent *) malloc (dsize);
75 if (vnew == NULL)
76 break;
77
78 v[i++] = (struct dirent *) memcpy (vnew, d, dsize);
79 }
80
81 if (errno != 0)
82 {
83 save = errno;
84 (void) closedir (dp);
85 while (i > 0)
86 free (v[--i]);
87 free (v);
88 errno = save;
89 return -1;
90 }
91
92 (void) closedir (dp);
93 errno = save;
94
95 /* Sort the list if we have a comparison function to sort with. */
96 if (cmp != NULL)
97 qsort (v, i, sizeof (*v), cmp);
98 *namelist = v;
99 return i;
100 }
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