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/**
* Copyright (c) 2008-2010 Alper Akcan <alper.akcan@gmail.com>
* Copyright (c) 2009-2010 Renzo Davoli <renzo@cs.unibo.it>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (in the main directory of the fuse-ext2
* distribution in the file COPYING); if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "fuse-ext2.h"
struct rmdir_st {
ext2_ino_t parent;
int empty;
};
static int rmdir_proc (ext2_ino_t dir EXT2FS_ATTR((unused)),
int entry EXT2FS_ATTR((unused)),
struct ext2_dir_entry *dirent,
int offset EXT2FS_ATTR((unused)),
int blocksize EXT2FS_ATTR((unused)),
char *buf EXT2FS_ATTR((unused)), void *private)
{
int *p_empty= (int *) private;
debugf("enter");
debugf("walking on: %s", dirent->name);
if (dirent->inode == 0 ||
(((dirent->name_len & 0xFF) == 1) && (dirent->name[0] == '.')) ||
(((dirent->name_len & 0xFF) == 2) && (dirent->name[0] == '.') &&
(dirent->name[1] == '.'))) {
debugf("leave");
return 0;
}
*p_empty = 0;
debugf("leave (not empty)");
return 0;
}
int do_check_empty_dir(ext2_filsys e2fs, ext2_ino_t ino)
{
errcode_t rc;
int empty = 1;
rc = ext2fs_dir_iterate2(e2fs, ino, 0, 0, rmdir_proc, &empty);
if (rc) {
debugf("while iterating over directory");
return -EIO;
}
if (empty == 0) {
debugf("directory not empty");
return -ENOTEMPTY;
}
return 0;
}
int op_rmdir (const char *path)
{
int rt;
errcode_t rc;
char *p_path;
char *r_path;
ext2_ino_t p_ino;
struct ext2_inode p_inode;
ext2_ino_t r_ino;
struct ext2_inode r_inode;
ext2_filsys e2fs;
FUSE_EXT2_LOCK;
e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s", path);
rt=do_check_split(path, &p_path, &r_path);
if (rt != 0) {
debugf("do_check_split: failed");
goto err;
}
debugf("parent: %s, child: %s", p_path, r_path);
rt = do_readinode(e2fs, p_path, &p_ino, &p_inode);
if (rt) {
debugf("do_readinode(%s, &p_ino, &p_inode); failed", p_path);
goto err_free_split;
}
rt = do_readinode(e2fs, path, &r_ino, &r_inode);
if (rt) {
debugf("do_readinode(%s, &r_ino, &r_inode); failed", path);
goto err_free_split;
}
if (!LINUX_S_ISDIR(r_inode.i_mode)) {
debugf("%s is not a directory", path);
rt = -ENOTDIR;
goto err_free_split;
}
if (r_ino == EXT2_ROOT_INO) {
debugf("root dir cannot be removed", path);
rt = -EIO;
goto err_free_split;
}
rt = do_check_empty_dir(e2fs, r_ino);
if (rt) {
debugf("do_check_empty_dir filed");
goto err_free_split;
}
rc = ext2fs_unlink(e2fs, p_ino, r_path, r_ino, 0);
if (rc) {
debugf("while unlinking ino %d", (int) r_ino);
rt = -EIO;
goto err_free_split;
}
rt = do_killfilebyinode(e2fs, r_ino, &r_inode);
if (rt) {
debugf("do_killfilebyinode(r_ino, &r_inode); failed");
goto err_free_split;
}
rt = do_readinode(e2fs, p_path, &p_ino, &p_inode);
if (rt) {
debugf("do_readinode(p_path, &p_ino, &p_inode); failed");
goto err_free_split;
}
if (p_inode.i_links_count > 1) {
p_inode.i_links_count--;
}
rc = ext2fs_write_inode(e2fs, p_ino, &p_inode);
if (rc) {
debugf("ext2fs_write_inode(e2fs, ino, inode); failed");
rt = -EIO;
goto err_free_split;
}
free_split(p_path, r_path);
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
err_free_split:
free_split(p_path, r_path);
err:
FUSE_EXT2_UNLOCK;
return rt;
}
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