platform_system_core/libsparse/simg2img.c

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <sparse/sparse.h>

#include <fcntl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

void usage()
{
  fprintf(stderr, "Usage: simg2img <sparse_image_file> <raw_image_file>\n");
}

int main(int argc, char *argv[])
{
	int in;
	int out;
	unsigned int i;
	int ret;
	struct sparse_file *s;

	if (argc != 3) {
		usage();
		exit(-1);
	}

	if (strcmp(argv[1], "-") == 0) {
		in = STDIN_FILENO;
	} else {
		if ((in = open(argv[1], O_RDONLY)) == 0) {
			fprintf(stderr, "Cannot open input file %s\n", argv[1]);
			exit(-1);
		}
	}

	if (strcmp(argv[2], "-") == 0) {
		out = STDOUT_FILENO;
	} else {
		if ((out = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, 0666)) == 0) {
			fprintf(stderr, "Cannot open output file %s\n", argv[2]);
			exit(-1);
		}
	}

	s = sparse_file_import(in, true, false);
	if (!s) {
		fprintf(stderr, "Failed to read sparse file\n");
		exit(-1);
	}
	ret = sparse_file_write(s, out, false, false, false);

	close(in);
	close(out);

	exit(0);
}