| /* |
| * lookup.c --- ext2fs directory lookup operations |
| * |
| * Copyright (C) 1993, 1994, 1994, 1995 Theodore Ts'o. |
| * |
| * %Begin-Header% |
| * This file may be redistributed under the terms of the GNU Public |
| * License. |
| * %End-Header% |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #if HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| #include <stdlib.h> |
| #if HAVE_ERRNO_H |
| #include <errno.h> |
| #endif |
| |
| #include <linux/ext2_fs.h> |
| |
| #include "ext2fs.h" |
| |
| struct lookup_struct { |
| const char *name; |
| int len; |
| ino_t *inode; |
| int found; |
| }; |
| |
| #ifdef __TURBOC__ |
| #pragma argsused |
| #endif |
| static int lookup_proc(struct ext2_dir_entry *dirent, |
| int offset, |
| int blocksize, |
| char *buf, |
| void *private) |
| { |
| struct lookup_struct *ls = (struct lookup_struct *) private; |
| |
| if (ls->len != dirent->name_len) |
| return 0; |
| if (strncmp(ls->name, dirent->name, dirent->name_len)) |
| return 0; |
| *ls->inode = dirent->inode; |
| ls->found++; |
| return DIRENT_ABORT; |
| } |
| |
| |
| errcode_t ext2fs_lookup(ext2_filsys fs, ino_t dir, const char *name, |
| int namelen, char *buf, ino_t *inode) |
| { |
| errcode_t retval; |
| struct lookup_struct ls; |
| |
| EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); |
| |
| ls.name = name; |
| ls.len = namelen; |
| ls.inode = inode; |
| ls.found = 0; |
| |
| retval = ext2fs_dir_iterate(fs, dir, 0, buf, lookup_proc, &ls); |
| if (retval) |
| return retval; |
| |
| return (ls.found) ? 0 : ENOENT; |
| } |
| |
| |