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 "config.h"
20 #include "e2p.h"
21 #if HAVE_UNISTD_H
22 #include <unistd.h>
23 #endif
24 #include <stdlib.h>
25 #include <string.h>
26
iterate_on_dir(const char * dir_name,int (* func)(const char *,struct dirent *,void *),void * private)27 int iterate_on_dir (const char * dir_name,
28 int (*func) (const char *, struct dirent *, void *),
29 void * private)
30 {
31 DIR * dir;
32 struct dirent *de, *dep;
33 int max_len = -1, len, ret = 0;
34
35 #if HAVE_PATHCONF && defined(_PC_NAME_MAX)
36 max_len = pathconf(dir_name, _PC_NAME_MAX);
37 #endif
38 if (max_len == -1) {
39 #ifdef _POSIX_NAME_MAX
40 max_len = _POSIX_NAME_MAX;
41 #else
42 #ifdef NAME_MAX
43 max_len = NAME_MAX;
44 #else
45 max_len = 256;
46 #endif /* NAME_MAX */
47 #endif /* _POSIX_NAME_MAX */
48 }
49 max_len += sizeof(struct dirent);
50
51 de = malloc(max_len+1);
52 if (!de)
53 return -1;
54 memset(de, 0, max_len+1);
55
56 dir = opendir (dir_name);
57 if (dir == NULL) {
58 free(de);
59 return -1;
60 }
61 while ((dep = readdir (dir))) {
62 #ifdef HAVE_RECLEN_DIRENT
63 len = dep->d_reclen;
64 if (len > max_len)
65 len = max_len;
66 #else
67 len = sizeof(struct dirent);
68 #endif
69 memcpy(de, dep, len);
70 if ((*func)(dir_name, de, private))
71 ret++;
72 }
73 free(de);
74 closedir(dir);
75 return ret;
76 }
77