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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* rdsquashfs.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "rdsquashfs.h"
int main(int argc, char **argv)
{
int status = EXIT_FAILURE;
data_reader_t *data = NULL;
sqfs_super_t super;
compressor_t *cmp;
tree_node_t *n;
options_t opt;
fstree_t fs;
int sqfsfd;
process_command_line(&opt, argc, argv);
sqfsfd = open(opt.image_name, O_RDONLY);
if (sqfsfd < 0) {
perror(opt.image_name);
goto out_cmd;
}
if (sqfs_super_read(&super, sqfsfd))
goto out_fd;
if (!compressor_exists(super.compression_id)) {
fputs("Image uses a compressor that has not been built in\n",
stderr);
goto out_fd;
}
cmp = compressor_create(super.compression_id, false,
super.block_size, NULL);
if (cmp == NULL)
goto out_fd;
if (super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
if (cmp->read_options(cmp, sqfsfd))
goto out_cmp;
}
if (deserialize_fstree(&fs, &super, cmp, sqfsfd, opt.rdtree_flags))
goto out_cmp;
fstree_gen_file_list(&fs);
if (opt.cmdpath != NULL) {
n = fstree_node_from_path(&fs, opt.cmdpath);
if (n == NULL) {
perror(opt.cmdpath);
goto out_fs;
}
} else {
n = fs.root;
}
switch (opt.op) {
case OP_LS:
list_files(n);
break;
case OP_CAT:
if (!S_ISREG(n->mode)) {
fprintf(stderr, "/%s: not a regular file\n",
opt.cmdpath);
goto out_fs;
}
data = data_reader_create(sqfsfd, &super, cmp);
if (data == NULL)
goto out_fs;
if (data_reader_dump_file(data, n->data.file,
STDOUT_FILENO, false))
goto out_fs;
break;
case OP_UNPACK:
if (opt.unpack_root != NULL) {
if (mkdir_p(opt.unpack_root))
return -1;
if (pushd(opt.unpack_root))
return -1;
}
if (restore_fstree(n, opt.flags))
goto out_fs;
data = data_reader_create(sqfsfd, &super, cmp);
if (data == NULL)
goto out_fs;
if (fill_unpacked_files(&fs, data, opt.flags, opt.num_jobs))
goto out_fs;
if (update_tree_attribs(n, opt.flags))
goto out_fs;
if (opt.unpack_root != NULL && popd() != 0)
goto out_fs;
break;
case OP_DESCRIBE:
describe_tree(fs.root, opt.unpack_root);
break;
}
status = EXIT_SUCCESS;
out_fs:
if (data != NULL)
data_reader_destroy(data);
fstree_cleanup(&fs);
out_cmp:
cmp->destroy(cmp);
out_fd:
close(sqfsfd);
out_cmd:
free(opt.cmdpath);
return status;
}
|
