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
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* extract.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfsdiff.h"
static int extract(data_reader_t *data, const sqfs_inode_generic_t *inode,
const char *prefix, const char *path, size_t block_size)
{
char *ptr, *temp;
int fd;
temp = alloca(strlen(prefix) + strlen(path) + 2);
sprintf(temp, "%s/%s", prefix, path);
ptr = strrchr(temp, '/');
*ptr = '\0';
if (mkdir_p(temp))
return -1;
*ptr = '/';
fd = open(temp, O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd < 0) {
perror(temp);
return -1;
}
if (data_reader_dump(data, inode, fd, block_size, true)) {
close(fd);
return -1;
}
close(fd);
return 0;
}
int extract_files(sqfsdiff_t *sd, const sqfs_inode_generic_t *old,
const sqfs_inode_generic_t *new,
const char *path)
{
if (old != NULL) {
if (extract(sd->sqfs_old.data, old, "old",
path, sd->sqfs_old.super.block_size))
return -1;
}
if (new != NULL) {
if (extract(sd->sqfs_new.data, new, "new",
path, sd->sqfs_new.super.block_size))
return -1;
}
return 0;
}
|
