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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* rdsquashfs.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "rdsquashfs.h"
static void dump_xattrs(fstree_t *fs, tree_xattr_t *xattr)
{
const char *key, *value;
size_t i;
for (i = 0; i < xattr->num_attr; ++i) {
key = str_table_get_string(&fs->xattr_keys,
xattr->attr[i].key_index);
value = str_table_get_string(&fs->xattr_values,
xattr->attr[i].value_index);
printf("%s=%s\n", key, value);
}
}
int main(int argc, char **argv)
{
sqfs_compressor_config_t cfg;
int status = EXIT_FAILURE;
sqfs_compressor_t *cmp;
data_reader_t *data;
sqfs_super_t super;
sqfs_file_t *file;
tree_node_t *n;
options_t opt;
fstree_t fs;
process_command_line(&opt, argc, argv);
file = sqfs_open_file(opt.image_name, SQFS_FILE_OPEN_READ_ONLY);
if (file == NULL) {
perror(opt.image_name);
goto out_cmd;
}
if (sqfs_super_read(&super, file)) {
fprintf(stderr, "%s: error reading super block.\n",
opt.image_name);
goto out_file;
}
if (!sqfs_compressor_exists(super.compression_id)) {
fprintf(stderr, "%s: unknown compressor used.\n",
opt.image_name);
goto out_file;
}
sqfs_compressor_config_init(&cfg, super.compression_id,
super.block_size,
SQFS_COMP_FLAG_UNCOMPRESS);
cmp = sqfs_compressor_create(&cfg);
if (cmp == NULL)
goto out_file;
if (super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
if (cmp->read_options(cmp, file))
goto out_cmp;
}
if (super.flags & SQFS_FLAG_NO_XATTRS)
opt.rdtree_flags &= ~RDTREE_READ_XATTR;
if (deserialize_fstree(&fs, &super, cmp, file, opt.rdtree_flags))
goto out_cmp;
fstree_gen_file_list(&fs);
data = data_reader_create(file, &super, cmp);
if (data == NULL)
goto out_fs;
if (opt.cmdpath != NULL) {
n = fstree_node_from_path(&fs, opt.cmdpath);
if (n == NULL) {
perror(opt.cmdpath);
goto out;
}
} 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;
}
if (data_reader_dump_file(data, n->data.file,
STDOUT_FILENO, false))
goto out;
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;
if (fill_unpacked_files(&fs, data, opt.flags, opt.num_jobs))
goto out;
if (update_tree_attribs(&fs, n, opt.flags))
goto out;
if (opt.unpack_root != NULL && popd() != 0)
goto out;
break;
case OP_DESCRIBE:
if (describe_tree(fs.root, opt.unpack_root))
goto out;
break;
case OP_RDATTR:
if (n->xattr != NULL)
dump_xattrs(&fs, n->xattr);
break;
}
status = EXIT_SUCCESS;
out:
data_reader_destroy(data);
out_fs:
fstree_cleanup(&fs);
out_cmp:
cmp->destroy(cmp);
out_file:
file->destroy(file);
out_cmd:
free(opt.cmdpath);
return status;
}
|
