1 /*
2 * iod.c - Iterate a function on each entry of a directory
3 *
4 * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr>
5 * Laboratoire MASI, Institut Blaise Pascal
6 * Universite Pierre et Marie Curie (Paris VI)
7 *
8 * This file can be redistributed under the terms of the GNU Library General
9 * Public License
10 */
11
12 /*
13 * History:
14 * 93/10/30 - Creation
15 */
16
17 #include "e2p.h"
18 #if HAVE_UNISTD_H
19 #include <unistd.h>
20 #endif
21 #include <stdlib.h>
22 #include <string.h>
23
iterate_on_dir(const char * dir_name,int (* func)(const char *,struct dirent *,void *),void * private)24 int iterate_on_dir (const char * dir_name,
25 int (*func) (const char *, struct dirent *, void *),
26 void * private)
27 {
28 DIR * dir;
29 struct dirent *de, *dep;
30 int max_len = -1, len;
31
32 #if HAVE_PATHCONF && defined(_PC_NAME_MAX)
33 max_len = pathconf(dir_name, _PC_NAME_MAX);
34 #endif
35 if (max_len == -1) {
36 #ifdef _POSIX_NAME_MAX
37 max_len = _POSIX_NAME_MAX;
38 #else
39 #ifdef NAME_MAX
40 max_len = NAME_MAX;
41 #else
42 max_len = 256;
43 #endif /* NAME_MAX */
44 #endif /* _POSIX_NAME_MAX */
45 }
46 max_len += sizeof(struct dirent);
47
48 de = malloc(max_len+1);
49 if (!de)
50 return -1;
51 memset(de, 0, max_len+1);
52
53 dir = opendir (dir_name);
54 if (dir == NULL) {
55 free(de);
56 return -1;
57 }
58 while ((dep = readdir (dir))) {
59 len = sizeof(struct dirent);
60 #ifdef HAVE_RECLEN_DIRENT
61 if (len < dep->d_reclen)
62 len = dep->d_reclen;
63 if (len > max_len)
64 len = max_len;
65 #endif
66 memcpy(de, dep, len);
67 (*func) (dir_name, de, private);
68 }
69 free(de);
70 closedir(dir);
71 return 0;
72 }
73