simg2img.c revision bdc6d39ed6c09199a5d806f29b71b44cbb27c5c2 
1/*
2 * Copyright (C) 2010 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#include <sparse/sparse.h>
18
19#include <fcntl.h>
20#include <stdbool.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <sys/types.h>
27#include <unistd.h>
28
29#ifndef O_BINARY
30#define O_BINARY 0
31#endif
32
33void usage()
34{
35  fprintf(stderr, "Usage: simg2img <sparse_image_files> <raw_image_file>\n");
36}
37
38int main(int argc, char *argv[])
39{
40	int in;
41	int out;
42	int i;
43	int ret;
44	struct sparse_file *s;
45
46	if (argc < 3) {
47		usage();
48		exit(-1);
49	}
50
51	out = open(argv[argc - 1], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
52	if (out < 0) {
53		fprintf(stderr, "Cannot open output file %s\n", argv[argc - 1]);
54		exit(-1);
55	}
56
57	for (i = 1; i < argc - 1; i++) {
58		if (strcmp(argv[i], "-") == 0) {
59			in = STDIN_FILENO;
60		} else {
61			in = open(argv[i], O_RDONLY | O_BINARY);
62			if (in < 0) {
63				fprintf(stderr, "Cannot open input file %s\n", argv[i]);
64				exit(-1);
65			}
66		}
67
68		s = sparse_file_import(in, true, false);
69		if (!s) {
70			fprintf(stderr, "Failed to read sparse file\n");
71			exit(-1);
72		}
73
74		lseek(out, SEEK_SET, 0);
75
76		ret = sparse_file_write(s, out, false, false, false);
77		if (ret < 0) {
78			fprintf(stderr, "Cannot write output file\n");
79			exit(-1);
80		}
81		sparse_file_destroy(s);
82		close(in);
83	}
84
85	close(out);
86
87	exit(0);
88}
89
90