1 /* 2 * lookup.c --- ext2fs directory lookup operations 3 * 4 * Copyright (C) 1993, 1994, 1994, 1995 Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Library 8 * General Public License, version 2. 9 * %End-Header% 10 */ 11 12 #include "config.h" 13 #include <stdio.h> 14 #include <string.h> 15 #if HAVE_UNISTD_H 16 #include <unistd.h> 17 #endif 18 19 #include "ext2_fs.h" 20 #include "ext2fs.h" 21 22 struct lookup_struct { 23 const char *name; 24 int len; 25 ext2_ino_t *inode; 26 int found; 27 }; 28 29 #ifdef __TURBOC__ 30 #pragma argsused 31 #endif 32 static int lookup_proc(struct ext2_dir_entry *dirent, 33 int offset EXT2FS_ATTR((unused)), 34 int blocksize EXT2FS_ATTR((unused)), 35 char *buf EXT2FS_ATTR((unused)), 36 void *priv_data) 37 { 38 struct lookup_struct *ls = (struct lookup_struct *) priv_data; 39 40 if (ls->len != ext2fs_dirent_name_len(dirent)) 41 return 0; 42 if (strncmp(ls->name, dirent->name, ext2fs_dirent_name_len(dirent))) 43 return 0; 44 *ls->inode = dirent->inode; 45 ls->found++; 46 return DIRENT_ABORT; 47 } 48 49 50 errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 51 int namelen, char *buf, ext2_ino_t *inode) 52 { 53 errcode_t retval; 54 struct lookup_struct ls; 55 56 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); 57 58 ls.name = name; 59 ls.len = namelen; 60 ls.inode = inode; 61 ls.found = 0; 62 63 retval = ext2fs_dir_iterate(fs, dir, 0, buf, lookup_proc, &ls); 64 if (retval) 65 return retval; 66 67 return (ls.found) ? 0 : EXT2_ET_FILE_NOT_FOUND; 68 } 69 70 71
