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 <stdio.h> 13 #include <string.h> 14 #if HAVE_UNISTD_H 15 #include <unistd.h> 16 #endif 17 18 #include "ext2_fs.h" 19 #include "ext2fs.h" 20 21 struct lookup_struct { 22 const char *name; 23 int len; 24 ext2_ino_t *inode; 25 int found; 26 }; 27 28 #ifdef __TURBOC__ 29 #pragma argsused 30 #endif 31 static int lookup_proc(struct ext2_dir_entry *dirent, 32 int offset EXT2FS_ATTR((unused)), 33 int blocksize EXT2FS_ATTR((unused)), 34 char *buf EXT2FS_ATTR((unused)), 35 void *priv_data) 36 { 37 struct lookup_struct *ls = (struct lookup_struct *) priv_data; 38 39 if (ls->len != (dirent->name_len & 0xFF)) 40 return 0; 41 if (strncmp(ls->name, dirent->name, (dirent->name_len & 0xFF))) 42 return 0; 43 *ls->inode = dirent->inode; 44 ls->found++; 45 return DIRENT_ABORT; 46 } 47 48 49 errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 50 int namelen, char *buf, ext2_ino_t *inode) 51 { 52 errcode_t retval; 53 struct lookup_struct ls; 54 55 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); 56 57 ls.name = name; 58 ls.len = namelen; 59 ls.inode = inode; 60 ls.found = 0; 61 62 retval = ext2fs_dir_iterate(fs, dir, 0, buf, lookup_proc, &ls); 63 if (retval) 64 return retval; 65 66 return (ls.found) ? 0 : EXT2_ET_FILE_NOT_FOUND; 67 } 68 69 70
