| /* |
| * unlink.c --- delete links in a ext2fs directory |
| * |
| * Copyright (C) 1993, 1994, 1997 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> |
| |
| #include <linux/ext2_fs.h> |
| |
| #include "ext2fs.h" |
| |
| struct link_struct { |
| const char *name; |
| int namelen; |
| ino_t inode; |
| int flags; |
| int done; |
| }; |
| |
| static int unlink_proc(struct ext2_dir_entry *dirent, |
| int offset, |
| int blocksize, |
| char *buf, |
| void *private) |
| { |
| struct link_struct *ls = (struct link_struct *) private; |
| |
| if (ls->name && (dirent->name_len != ls->namelen)) |
| return 0; |
| if (ls->name && strncmp(ls->name, dirent->name, dirent->name_len)) |
| return 0; |
| if (ls->inode && (dirent->inode != ls->inode)) |
| return 0; |
| |
| dirent->inode = 0; |
| ls->done++; |
| return DIRENT_ABORT|DIRENT_CHANGED; |
| } |
| |
| errcode_t ext2fs_unlink(ext2_filsys fs, ino_t dir, const char *name, ino_t ino, |
| int flags) |
| { |
| errcode_t retval; |
| struct link_struct ls; |
| |
| EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); |
| |
| if (!(fs->flags & EXT2_FLAG_RW)) |
| return EXT2_ET_RO_FILSYS; |
| |
| ls.name = name; |
| ls.namelen = name ? strlen(name) : 0; |
| ls.inode = ino; |
| ls.flags = 0; |
| ls.done = 0; |
| |
| retval = ext2fs_dir_iterate(fs, dir, 0, 0, unlink_proc, &ls); |
| if (retval) |
| return retval; |
| |
| return (ls.done) ? 0 : EXT2_ET_DIR_NO_SPACE; |
| } |
| |