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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* sqfs2tar.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfs2tar.h"
static sqfs_ostream_t *out_file = NULL;
static int terminate_archive(void)
{
char buffer[1024];
memset(buffer, '\0', sizeof(buffer));
return out_file->append(out_file, buffer, sizeof(buffer));
}
static int write_file_data(sqfs_dir_iterator_t *it, const sqfs_dir_entry_t *ent)
{
sqfs_istream_t *in;
int ret;
ret = it->open_file_ro(it, &in);
if (ret)
return ret;
do {
ret = sqfs_istream_splice(in, out_file,
SQFS_DEFAULT_BLOCK_SIZE);
} while (ret > 0);
in = sqfs_drop(in);
if (ret == 0)
ret = padd_file(out_file, ent->size);
return ret;
}
static int write_entry(sqfs_dir_iterator_t *it, const sqfs_dir_entry_t *ent)
{
static unsigned int record_counter;
sqfs_xattr_t *xattr = NULL;
char *target = NULL;
int ret;
if (S_ISLNK(ent->mode) ||
(ent->flags & SQFS_DIR_ENTRY_FLAG_HARD_LINK)) {
ret = it->read_link(it, &target);
if (ret != 0) {
sqfs_perror(ent->name, "reading link target", ret);
return ret;
}
}
ret = it->read_xattr(it, &xattr);
if (ret != 0) {
sqfs_perror(ent->name, "reading xattr data", ret);
sqfs_free(target);
return ret;
}
ret = write_tar_header(out_file, ent, target, xattr, record_counter++);
if (ret)
sqfs_perror(ent->name, "writing tar header", ret);
if (S_ISREG(ent->mode) && ret == 0)
ret = write_file_data(it, ent);
sqfs_xattr_list_free(xattr);
sqfs_free(target);
return ret;
}
int main(int argc, char **argv)
{
int ret, status = EXIT_FAILURE;
sqfs_dir_iterator_t *it = NULL;
process_args(argc, argv);
ret = ostream_open_stdout(&out_file);
if (ret) {
sqfs_perror("stdout", "creating stream wrapper", ret);
goto out;
}
if (compressor > 0) {
xfrm_stream_t *xfrm = compressor_stream_create(compressor,NULL);
sqfs_ostream_t *strm;
if (xfrm == NULL)
goto out;
strm = ostream_xfrm_create(out_file, xfrm);
sqfs_drop(out_file);
sqfs_drop(xfrm);
out_file = strm;
if (out_file == NULL)
goto out;
}
it = tar_compat_iterator_create(filename);
if (it == NULL)
goto out;
if (!no_links) {
sqfs_dir_iterator_t *hl;
ret = sqfs_hard_link_filter_create(&hl, it);
it = sqfs_drop(it);
if (ret != 0) {
sqfs_perror(filename, "creating hard link filter", ret);
goto out;
}
it = hl;
}
for (;;) {
sqfs_dir_entry_t *ent;
ret = it->next(it, &ent);
if (ret > 0)
break;
if (ret < 0) {
sqfs_perror(filename, "reading directory entry", ret);
goto out;
}
ret = write_entry(it, ent);
if (ret == SQFS_ERROR_UNSUPPORTED) {
fprintf(stderr, "WARNING: %s: unsupported file type\n",
ent->name);
if (dont_skip) {
fputs("Not allowed to skip files, aborting!\n",
stderr);
sqfs_free(ent);
goto out;
}
fprintf(stderr, "Skipping %s\n", ent->name);
sqfs_free(ent);
continue;
}
if (ret) {
sqfs_perror(ent->name, NULL, ret);
sqfs_free(ent);
goto out;
}
sqfs_free(ent);
}
if (terminate_archive())
goto out;
ret = out_file->flush(out_file);
if (ret) {
sqfs_perror(out_file->get_filename(out_file), NULL, ret);
goto out;
}
status = EXIT_SUCCESS;
out:
sqfs_drop(it);
sqfs_drop(out_file);
strlist_cleanup(&subdirs);
free(root_becomes);
return status;
}
|