1 /* 2 * iod.c - Iterate a function on each entry of a directory 3 * 4 * Copyright (C) 1993, 1994 Remy Card <card (at) 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 17 #include "e2p.h" 18 #if HAVE_UNISTD_H 19 #include <unistd.h> 20 #endif 21 #include <stdlib.h> 22 #include <string.h> 23 24 int iterate_on_dir (const char * dir_name, 25 int (*func) (const char *, struct dirent *, void *), 26 void * private) 27 { 28 DIR * dir; 29 struct dirent *de, *dep; 30 int max_len = -1, len; 31 32 #if HAVE_PATHCONF && defined(_PC_NAME_MAX) 33 max_len = pathconf(dir_name, _PC_NAME_MAX); 34 #endif 35 if (max_len == -1) { 36 #ifdef _POSIX_NAME_MAX 37 max_len = _POSIX_NAME_MAX; 38 #else 39 #ifdef NAME_MAX 40 max_len = NAME_MAX; 41 #else 42 max_len = 256; 43 #endif /* NAME_MAX */ 44 #endif /* _POSIX_NAME_MAX */ 45 } 46 max_len += sizeof(struct dirent); 47 48 de = malloc(max_len+1); 49 if (!de) 50 return -1; 51 memset(de, 0, max_len+1); 52 53 dir = opendir (dir_name); 54 if (dir == NULL) { 55 free(de); 56 return -1; 57 } 58 while ((dep = readdir (dir))) { 59 len = sizeof(struct dirent); 60 #ifdef HAVE_RECLEN_DIRENT 61 if (len < dep->d_reclen) 62 len = dep->d_reclen; 63 if (len > max_len) 64 len = max_len; 65 #endif 66 memcpy(de, dep, len); 67 (*func) (dir_name, de, private); 68 } 69 free(de); 70 closedir(dir); 71 return 0; 72 } 73
