Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 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 | |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 17 | #include "e2p.h" |
Theodore Ts'o | 593c6ea | 2002-07-14 15:58:38 -0400 | [diff] [blame] | 18 | #if HAVE_UNISTD_H |
| 19 | #include <unistd.h> |
| 20 | #endif |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 21 | |
| 22 | int iterate_on_dir (const char * dir_name, |
| 23 | int (*func) (const char *, struct dirent *, void *), |
| 24 | void * private) |
| 25 | { |
| 26 | DIR * dir; |
Theodore Ts'o | 593c6ea | 2002-07-14 15:58:38 -0400 | [diff] [blame] | 27 | struct dirent *de, *dep; |
| 28 | int max_len = -1, len; |
| 29 | |
| 30 | #if HAVE_PATHCONF && defined(_PC_NAME_MAX) |
| 31 | max_len = pathconf(dir_name, _PC_NAME_MAX); |
Theodore Ts'o | 50e1e10 | 1997-04-26 13:58:21 +0000 | [diff] [blame] | 32 | #endif |
Theodore Ts'o | 593c6ea | 2002-07-14 15:58:38 -0400 | [diff] [blame] | 33 | if (max_len == -1) { |
| 34 | #ifdef _POSIX_NAME_MAX |
| 35 | max_len = _POSIX_NAME_MAX; |
| 36 | #else |
| 37 | #ifdef NAME_MAX |
| 38 | max_len = NAME_MAX; |
| 39 | #else |
| 40 | max_len = 256; |
| 41 | #endif /* NAME_MAX */ |
| 42 | #endif /* _POSIX_NAME_MAX */ |
| 43 | } |
| 44 | max_len += sizeof(struct dirent); |
| 45 | |
| 46 | de = malloc(max_len+1); |
| 47 | if (!de) |
| 48 | return -1; |
| 49 | memset(de, 0, max_len+1); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 50 | |
| 51 | dir = opendir (dir_name); |
Theodore Ts'o | 593c6ea | 2002-07-14 15:58:38 -0400 | [diff] [blame] | 52 | if (dir == NULL) { |
| 53 | free(de); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 54 | return -1; |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 55 | } |
Theodore Ts'o | 593c6ea | 2002-07-14 15:58:38 -0400 | [diff] [blame] | 56 | while ((dep = readdir (dir))) { |
| 57 | len = dep->d_reclen; |
| 58 | if (len < (sizeof(struct dirent))) |
| 59 | len = sizeof(struct dirent); |
| 60 | if (len > max_len) |
| 61 | len = max_len; |
| 62 | memcpy(de, dep, len); |
| 63 | (*func) (dir_name, de, private); |
| 64 | } |
| 65 | free(de); |
| 66 | closedir(dir); |
Theodore Ts'o | 3839e65 | 1997-04-26 13:21:57 +0000 | [diff] [blame] | 67 | return 0; |
| 68 | } |