| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [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 | * %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 | |
| 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 | } |