mirror of
https://github.com/sheumann/hush.git
synced 2024-11-18 01:11:52 +00:00
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/*
|
|
* valid_blk.c --- does the inode have valid blocks?
|
|
*
|
|
* Copyright 1997 by Theodore Ts'o
|
|
*
|
|
* %Begin-Header%
|
|
* This file may be redistributed under the terms of the GNU Public
|
|
* License.
|
|
* %End-Header%
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#if HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#include <string.h>
|
|
#include <time.h>
|
|
|
|
#include "ext2_fs.h"
|
|
#include "ext2fs.h"
|
|
|
|
/*
|
|
* This function returns 1 if the inode's block entries actually
|
|
* contain block entries.
|
|
*/
|
|
int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode)
|
|
{
|
|
/*
|
|
* Only directories, regular files, and some symbolic links
|
|
* have valid block entries.
|
|
*/
|
|
if (!LINUX_S_ISDIR(inode->i_mode) && !LINUX_S_ISREG(inode->i_mode) &&
|
|
!LINUX_S_ISLNK(inode->i_mode))
|
|
return 0;
|
|
|
|
/*
|
|
* If the symbolic link is a "fast symlink", then the symlink
|
|
* target is stored in the block entries.
|
|
*/
|
|
if (LINUX_S_ISLNK (inode->i_mode)) {
|
|
if (inode->i_file_acl == 0) {
|
|
/* With no EA block, we can rely on i_blocks */
|
|
if (inode->i_blocks == 0)
|
|
return 0;
|
|
} else {
|
|
/* With an EA block, life gets more tricky */
|
|
if (inode->i_size >= EXT2_N_BLOCKS*4)
|
|
return 1; /* definitely using i_block[] */
|
|
if (inode->i_size > 4 && inode->i_block[1] == 0)
|
|
return 1; /* definitely using i_block[] */
|
|
return 0; /* Probably a fast symlink */
|
|
}
|
|
}
|
|
return 1;
|
|
}
|