mirror of https://github.com/vitalif/e2fsprogs
73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
/*
|
|
* 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>
|
|
#include <unistd.h>
|
|
#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;
|
|
}
|
|
|