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
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)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
ext2fs_lookup(ext2_filsys fs,ext2_ino_t dir,const char * name,int namelen,char * buf,ext2_ino_t * inode)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