Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 1 | /* |
| 2 | * lookup.c --- ext2fs directory lookup operations |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 3 | * |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 4 | * Copyright (C) 1993, 1994, 1994, 1995 Theodore Ts'o. |
| 5 | * |
| 6 | * %Begin-Header% |
Theodore Ts'o | 543547a | 2010-05-17 21:31:56 -0400 | [diff] [blame] | 7 | * This file may be redistributed under the terms of the GNU Library |
| 8 | * General Public License, version 2. |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 9 | * %End-Header% |
| 10 | */ |
| 11 | |
Theodore Ts'o | d1154eb | 2011-09-18 17:34:37 -0400 | [diff] [blame] | 12 | #include "config.h" |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 13 | #include <stdio.h> |
| 14 | #include <string.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 15 | #if HAVE_UNISTD_H |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 16 | #include <unistd.h> |
Theodore Ts'o | 4cbe8af | 1997-08-10 23:07:40 +0000 | [diff] [blame] | 17 | #endif |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 18 | |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 19 | #include "ext2_fs.h" |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 20 | #include "ext2fs.h" |
| 21 | |
| 22 | struct lookup_struct { |
| 23 | const char *name; |
| 24 | int len; |
Theodore Ts'o | 31dbecd | 2001-01-11 04:54:39 +0000 | [diff] [blame] | 25 | ext2_ino_t *inode; |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 26 | int found; |
Theodore Ts'o | efc6f62 | 2008-08-27 23:07:54 -0400 | [diff] [blame] | 27 | }; |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 28 | |
Theodore Ts'o | 3cb6c50 | 1997-08-11 20:29:22 +0000 | [diff] [blame] | 29 | #ifdef __TURBOC__ |
Theodore Ts'o | 48e6e81 | 2003-07-06 00:36:48 -0400 | [diff] [blame] | 30 | #pragma argsused |
Theodore Ts'o | 3cb6c50 | 1997-08-11 20:29:22 +0000 | [diff] [blame] | 31 | #endif |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 32 | static int lookup_proc(struct ext2_dir_entry *dirent, |
Theodore Ts'o | 5443492 | 2003-12-07 01:28:50 -0500 | [diff] [blame] | 33 | int offset EXT2FS_ATTR((unused)), |
| 34 | int blocksize EXT2FS_ATTR((unused)), |
| 35 | char *buf EXT2FS_ATTR((unused)), |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 36 | void *priv_data) |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 37 | { |
Theodore Ts'o | b5abe6f | 1998-01-19 14:47:53 +0000 | [diff] [blame] | 38 | struct lookup_struct *ls = (struct lookup_struct *) priv_data; |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 39 | |
Theodore Ts'o | 674a4ee | 1998-03-23 02:06:52 +0000 | [diff] [blame] | 40 | if (ls->len != (dirent->name_len & 0xFF)) |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 41 | return 0; |
Theodore Ts'o | 674a4ee | 1998-03-23 02:06:52 +0000 | [diff] [blame] | 42 | if (strncmp(ls->name, dirent->name, (dirent->name_len & 0xFF))) |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 43 | return 0; |
| 44 | *ls->inode = dirent->inode; |
| 45 | ls->found++; |
| 46 | return DIRENT_ABORT; |
| 47 | } |
| 48 | |
| 49 | |
Theodore Ts'o | 31dbecd | 2001-01-11 04:54:39 +0000 | [diff] [blame] | 50 | errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, |
| 51 | int namelen, char *buf, ext2_ino_t *inode) |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 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 | |
Theodore Ts'o | 1f0b6c1 | 1997-10-31 06:07:47 +0000 | [diff] [blame] | 67 | return (ls.found) ? 0 : EXT2_ET_FILE_NOT_FOUND; |
Theodore Ts'o | 19c78dc | 1997-04-29 16:17:09 +0000 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | |