1 /*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define _FILE_OFFSET_BITS 64
18 #define _LARGEFILE64_SOURCE 1
19 #define _GNU_SOURCE
20
21 #include <fcntl.h>
22 #include <stdbool.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <sys/types.h>
29 #include <unistd.h>
30
31 #include <sparse/sparse.h>
32
33 #ifndef O_BINARY
34 #define O_BINARY 0
35 #endif
36
usage()37 void usage()
38 {
39 fprintf(stderr, "Usage: simg2simg <sparse image file> <sparse_image_file> <max_size>\n");
40 }
41
main(int argc,char * argv[])42 int main(int argc, char *argv[])
43 {
44 int in;
45 int out;
46 int i;
47 int ret;
48 struct sparse_file *s;
49 int64_t max_size;
50 struct sparse_file **out_s;
51 int files;
52 char filename[4096];
53
54 if (argc != 4) {
55 usage();
56 exit(-1);
57 }
58
59 max_size = atoll(argv[3]);
60
61 in = open(argv[1], O_RDONLY | O_BINARY);
62 if (in < 0) {
63 fprintf(stderr, "Cannot open input file %s\n", argv[1]);
64 exit(-1);
65 }
66
67 s = sparse_file_import(in, true, false);
68 if (!s) {
69 fprintf(stderr, "Failed to import sparse file\n");
70 exit(-1);
71 }
72
73 files = sparse_file_resparse(s, max_size, NULL, 0);
74 if (files < 0) {
75 fprintf(stderr, "Failed to resparse\n");
76 exit(-1);
77 }
78
79 out_s = calloc(sizeof(struct sparse_file *), files);
80 if (!out_s) {
81 fprintf(stderr, "Failed to allocate sparse file array\n");
82 exit(-1);
83 }
84
85 files = sparse_file_resparse(s, max_size, out_s, files);
86 if (files < 0) {
87 fprintf(stderr, "Failed to resparse\n");
88 exit(-1);
89 }
90
91 for (i = 0; i < files; i++) {
92 ret = snprintf(filename, sizeof(filename), "%s.%d", argv[2], i);
93 if (ret >= (int)sizeof(filename)) {
94 fprintf(stderr, "Filename too long\n");
95 exit(-1);
96 }
97
98 out = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
99 if (out < 0) {
100 fprintf(stderr, "Cannot open output file %s\n", argv[2]);
101 exit(-1);
102 }
103
104 ret = sparse_file_write(out_s[i], out, false, true, false);
105 if (ret) {
106 fprintf(stderr, "Failed to write sparse file\n");
107 exit(-1);
108 }
109 close(out);
110 }
111
112 close(in);
113
114 exit(0);
115 }
116