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