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
20#include <fcntl.h>
21#include <stdbool.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/types.h>
28#include <unistd.h>
29
30#include <sparse/sparse.h>
31
32#ifndef O_BINARY
33#define O_BINARY 0
34#endif
35
36#if defined(__APPLE__) && defined(__MACH__)
37#define lseek64 lseek
38#define off64_t off_t
39#endif
40
41void usage()
42{
43    fprintf(stderr, "Usage: img2simg <raw_image_file> <sparse_image_file> [<block_size>]\n");
44}
45
46int main(int argc, char *argv[])
47{
48	int in;
49	int out;
50	unsigned int i;
51	int ret;
52	struct sparse_file *s;
53	unsigned int block_size = 4096;
54	off64_t len;
55
56	if (argc < 3 || argc > 4) {
57		usage();
58		exit(-1);
59	}
60
61	if (argc == 4) {
62		block_size = atoi(argv[3]);
63	}
64
65	if (block_size < 1024 || block_size % 4 != 0) {
66		usage();
67		exit(-1);
68	}
69
70	if (strcmp(argv[1], "-") == 0) {
71		in = STDIN_FILENO;
72	} else {
73		in = open(argv[1], O_RDONLY | O_BINARY);
74		if (in < 0) {
75			fprintf(stderr, "Cannot open input file %s\n", argv[1]);
76			exit(-1);
77		}
78	}
79
80	if (strcmp(argv[2], "-") == 0) {
81		out = STDOUT_FILENO;
82	} else {
83		out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0664);
84		if (out < 0) {
85			fprintf(stderr, "Cannot open output file %s\n", argv[2]);
86			exit(-1);
87		}
88	}
89
90	len = lseek64(in, 0, SEEK_END);
91	lseek64(in, 0, SEEK_SET);
92
93	s = sparse_file_new(block_size, len);
94	if (!s) {
95		fprintf(stderr, "Failed to create sparse file\n");
96		exit(-1);
97	}
98
99	sparse_file_verbose(s);
100	ret = sparse_file_read(s, in, false, false);
101	if (ret) {
102		fprintf(stderr, "Failed to read file\n");
103		exit(-1);
104	}
105
106	ret = sparse_file_write(s, out, false, true, false);
107	if (ret) {
108		fprintf(stderr, "Failed to write sparse file\n");
109		exit(-1);
110	}
111
112	close(in);
113	close(out);
114
115	exit(0);
116}
117