paul@181 | 1 | /* |
paul@181 | 2 | * iod.c - Iterate a function on each entry of a directory |
paul@181 | 3 | * |
paul@181 | 4 | * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr> |
paul@181 | 5 | * Laboratoire MASI, Institut Blaise Pascal |
paul@181 | 6 | * Universite Pierre et Marie Curie (Paris VI) |
paul@181 | 7 | * |
paul@181 | 8 | * %Begin-Header% |
paul@181 | 9 | * This file may be redistributed under the terms of the GNU Library |
paul@181 | 10 | * General Public License, version 2. |
paul@181 | 11 | * %End-Header% |
paul@181 | 12 | */ |
paul@181 | 13 | |
paul@181 | 14 | /* |
paul@181 | 15 | * History: |
paul@181 | 16 | * 93/10/30 - Creation |
paul@181 | 17 | */ |
paul@181 | 18 | |
paul@181 | 19 | #include "config.h" |
paul@181 | 20 | #include "e2p.h" |
paul@181 | 21 | #if HAVE_UNISTD_H |
paul@181 | 22 | #include <unistd.h> |
paul@181 | 23 | #endif |
paul@181 | 24 | #include <stdlib.h> |
paul@181 | 25 | #include <string.h> |
paul@181 | 26 | |
paul@181 | 27 | int iterate_on_dir (const char * dir_name, |
paul@181 | 28 | int (*func) (const char *, struct dirent *, void *), |
paul@181 | 29 | void * private) |
paul@181 | 30 | { |
paul@181 | 31 | DIR * dir; |
paul@181 | 32 | struct dirent *de, *dep; |
paul@181 | 33 | int max_len = -1, len, ret = 0; |
paul@181 | 34 | |
paul@181 | 35 | #if HAVE_PATHCONF && defined(_PC_NAME_MAX) |
paul@181 | 36 | max_len = pathconf(dir_name, _PC_NAME_MAX); |
paul@181 | 37 | #endif |
paul@181 | 38 | if (max_len == -1) { |
paul@181 | 39 | #ifdef _POSIX_NAME_MAX |
paul@181 | 40 | max_len = _POSIX_NAME_MAX; |
paul@181 | 41 | #else |
paul@181 | 42 | #ifdef NAME_MAX |
paul@181 | 43 | max_len = NAME_MAX; |
paul@181 | 44 | #else |
paul@181 | 45 | max_len = 256; |
paul@181 | 46 | #endif /* NAME_MAX */ |
paul@181 | 47 | #endif /* _POSIX_NAME_MAX */ |
paul@181 | 48 | } |
paul@181 | 49 | max_len += sizeof(struct dirent); |
paul@181 | 50 | |
paul@181 | 51 | de = malloc(max_len+1); |
paul@181 | 52 | if (!de) |
paul@181 | 53 | return -1; |
paul@181 | 54 | memset(de, 0, max_len+1); |
paul@181 | 55 | |
paul@181 | 56 | dir = opendir (dir_name); |
paul@181 | 57 | if (dir == NULL) { |
paul@181 | 58 | free(de); |
paul@181 | 59 | return -1; |
paul@181 | 60 | } |
paul@181 | 61 | while ((dep = readdir (dir))) { |
paul@181 | 62 | #ifdef HAVE_RECLEN_DIRENT |
paul@181 | 63 | len = dep->d_reclen; |
paul@181 | 64 | if (len > max_len) |
paul@181 | 65 | len = max_len; |
paul@181 | 66 | #else |
paul@181 | 67 | len = sizeof(struct dirent); |
paul@181 | 68 | #endif |
paul@181 | 69 | memcpy(de, dep, len); |
paul@181 | 70 | if ((*func)(dir_name, de, private)) |
paul@181 | 71 | ret++; |
paul@181 | 72 | } |
paul@181 | 73 | free(de); |
paul@181 | 74 | closedir(dir); |
paul@181 | 75 | return ret; |
paul@181 | 76 | } |