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 * %Begin-Header%
9 * This file may be redistributed under the terms of the GNU Library
10 * General Public License, version 2.
11 * %End-Header%
12 */
13
14 /*
15 * History:
16 * 93/10/30 - Creation
17 */
18
19 #include "e2p.h"
20 #if HAVE_UNISTD_H
21 #include <unistd.h>
22 #endif
23 #include <stdlib.h>
24 #include <string.h>
25
iterate_on_dir(const char * dir_name,int (* func)(const char *,struct dirent *,void *),void * private)26 int iterate_on_dir (const char * dir_name,
27 int (*func) (const char *, struct dirent *, void *),
28 void * private)
29 {
30 DIR * dir;
31 struct dirent *de, *dep;
32 int max_len = -1, len, ret = 0;
33
34 #if HAVE_PATHCONF && defined(_PC_NAME_MAX)
35 max_len = pathconf(dir_name, _PC_NAME_MAX);
36 #endif
37 if (max_len == -1) {
38 #ifdef _POSIX_NAME_MAX
39 max_len = _POSIX_NAME_MAX;
40 #else
41 #ifdef NAME_MAX
42 max_len = NAME_MAX;
43 #else
44 max_len = 256;
45 #endif /* NAME_MAX */
46 #endif /* _POSIX_NAME_MAX */
47 }
48 max_len += sizeof(struct dirent);
49
50 de = malloc(max_len+1);
51 if (!de)
52 return -1;
53 memset(de, 0, max_len+1);
54
55 dir = opendir (dir_name);
56 if (dir == NULL) {
57 free(de);
58 return -1;
59 }
60 while ((dep = readdir (dir))) {
61 #ifdef HAVE_RECLEN_DIRENT
62 len = dep->d_reclen;
63 if (len > max_len)
64 len = max_len;
65 #else
66 len = sizeof(struct dirent);
67 #endif
68 memcpy(de, dep, len);
69 if ((*func)(dir_name, de, private))
70 ret++;
71 }
72 free(de);
73 closedir(dir);
74 return ret;
75 }
76