blob: 27c718ea5a37c7d687c9b86ef371c88780763f85 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* newdir.c --- create a new directory block
*
* Copyright (C) 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 "ext2_fs.h"
#include "ext2fs.h"
#ifndef EXT2_FT_DIR
#define EXT2_FT_DIR 2
#endif
/*
* Create new directory block
*/
errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
ext2_ino_t parent_ino, char **block)
{
struct ext2_dir_entry *dir = NULL;
errcode_t retval;
char *buf;
int rec_len;
int filetype = 0;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
retval = ext2fs_get_mem(fs->blocksize, &buf);
if (retval)
return retval;
memset(buf, 0, fs->blocksize);
dir = (struct ext2_dir_entry *) buf;
dir->rec_len = fs->blocksize;
if (dir_ino) {
if (fs->super->s_feature_incompat &
EXT2_FEATURE_INCOMPAT_FILETYPE)
filetype = EXT2_FT_DIR << 8;
/*
* Set up entry for '.'
*/
dir->inode = dir_ino;
dir->name_len = 1 | filetype;
dir->name[0] = '.';
rec_len = dir->rec_len - EXT2_DIR_REC_LEN(1);
dir->rec_len = EXT2_DIR_REC_LEN(1);
/*
* Set up entry for '..'
*/
dir = (struct ext2_dir_entry *) (buf + dir->rec_len);
dir->rec_len = rec_len;
dir->inode = parent_ino;
dir->name_len = 2 | filetype;
dir->name[0] = '.';
dir->name[1] = '.';
}
*block = buf;
return 0;
}
|
