blob: b2e8de8ec54d625601e53a24d149d0f32b79998f
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * lookup.c --- ext2fs directory lookup operations |
4 | * |
5 | * Copyright (C) 1993, 1994, 1994, 1995 Theodore Ts'o. |
6 | * |
7 | * %Begin-Header% |
8 | * This file may be redistributed under the terms of the GNU Public |
9 | * License. |
10 | * %End-Header% |
11 | */ |
12 | |
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 != (dirent->name_len & 0xFF)) |
41 | return 0; |
42 | if (strncmp(ls->name, dirent->name, (dirent->name_len & 0xFF))) |
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 |