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
lookup_proc(struct ext2_dir_entry * dirent,int offset EXT2FS_ATTR ((unused)),int blocksize EXT2FS_ATTR ((unused)),char * buf EXT2FS_ATTR ((unused)),void * priv_data)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
ext2fs_lookup(ext2_filsys fs,ext2_ino_t dir,const char * name,int namelen,char * buf,ext2_ino_t * inode)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