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
|
/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* sqfsdiff.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "sqfsdiff.h"
static int open_sfqs(sqfs_state_t *state, const char *path)
{
state->file = sqfs_open_file(path, SQFS_FILE_OPEN_READ_ONLY);
if (state->file == NULL) {
perror(path);
return -1;
}
if (sqfs_super_read(&state->super, state->file)) {
fprintf(stderr, "error reading super block from %s\n",
path);
goto fail_file;
}
if (!sqfs_compressor_exists(state->super.compression_id)) {
fprintf(stderr, "%s: unknown compressor used.\n",
path);
goto fail_file;
}
sqfs_compressor_config_init(&state->cfg, state->super.compression_id,
state->super.block_size,
SQFS_COMP_FLAG_UNCOMPRESS);
state->cmp = sqfs_compressor_create(&state->cfg);
if (state->cmp == NULL) {
fprintf(stderr, "%s: error creating compressor.\n", path);
goto fail_file;
}
if (state->super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
if (state->cmp->read_options(state->cmp, state->file)) {
fprintf(stderr, "%s: error loading compressor "
"options.\n", path);
goto fail_cmp;
}
}
state->idtbl = sqfs_id_table_create();
if (state->idtbl == NULL) {
perror("error creating ID table");
goto fail_cmp;
}
if (sqfs_id_table_read(state->idtbl, state->file,
&state->super, state->cmp)) {
fprintf(stderr, "%s: error loading ID table\n", path);
goto fail_id;
}
state->dr = sqfs_dir_reader_create(&state->super, state->cmp,
state->file);
if (state->dr == NULL) {
perror("creating directory reader");
goto fail_dr;
}
if (sqfs_dir_reader_get_full_hierarchy(state->dr, state->idtbl,
NULL, 0, &state->root)) {
fprintf(stderr, "%s: error loading file system tree\n", path);
goto fail_dr;
}
state->data = sqfs_data_reader_create(state->file,
state->super.block_size,
state->cmp);
if (state->data == NULL) {
fprintf(stderr, "%s: error loading file system tree\n", path);
goto fail_tree;
}
if (sqfs_data_reader_load_fragment_table(state->data, &state->super))
goto fail_data;
return 0;
fail_data:
sqfs_data_reader_destroy(state->data);
fail_tree:
sqfs_dir_tree_destroy(state->root);
fail_dr:
sqfs_dir_reader_destroy(state->dr);
fail_id:
sqfs_id_table_destroy(state->idtbl);
fail_cmp:
state->cmp->destroy(state->cmp);
fail_file:
state->file->destroy(state->file);
return -1;
}
static void close_sfqs(sqfs_state_t *state)
{
sqfs_data_reader_destroy(state->data);
sqfs_dir_tree_destroy(state->root);
sqfs_dir_reader_destroy(state->dr);
sqfs_id_table_destroy(state->idtbl);
state->cmp->destroy(state->cmp);
state->file->destroy(state->file);
}
int main(int argc, char **argv)
{
int status, ret = 0;
sqfsdiff_t sd;
memset(&sd, 0, sizeof(sd));
process_options(&sd, argc, argv);
if (sd.extract_dir != NULL) {
if (mkdir_p(sd.extract_dir))
return 2;
}
if (open_sfqs(&sd.sqfs_old, sd.old_path))
return 2;
if (open_sfqs(&sd.sqfs_new, sd.new_path)) {
status = 2;
goto out_sqfs_old;
}
if (sd.extract_dir != NULL) {
if (chdir(sd.extract_dir)) {
perror(sd.extract_dir);
ret = -1;
goto out;
}
}
ret = node_compare(&sd, sd.sqfs_old.root, sd.sqfs_new.root);
if (ret != 0)
goto out;
if (sd.compare_super) {
ret = compare_super_blocks(&sd.sqfs_old.super,
&sd.sqfs_new.super);
if (ret != 0)
goto out;
}
out:
if (ret < 0) {
status = 2;
} else if (ret > 0) {
status = 1;
} else {
status = 0;
}
close_sfqs(&sd.sqfs_new);
out_sqfs_old:
close_sfqs(&sd.sqfs_old);
return status;
}
|
