/*
 * Copyright (c) 2000 - 2017 Samsung Electronics Co., Ltd.
 *
 * Contact: MyoungJune Park <mj2004.park@samsung.com>
 *   Created by Wonil Choi <wonil22.choi@samsung.com>
 *
 * 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 <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/reboot.h>

static const char *RESET_FLAG_FILE = "/opt/.factoryreset";
static const char *RUN_SCRIPT_FILE = "/usr/bin/run-factory-reset.sh";

int run_factory_reset(void)
{
	int status;
	pid_t cpid;
	const char *script_cmd[] = {RUN_SCRIPT_FILE, NULL};

	cpid = fork();

	/* error */
	if (cpid == -1) {
		perror("fork");
		return -1;
	}

	/* child */
	if (cpid == 0) {
		execvp(script_cmd[0], (char *const *)script_cmd);
		_exit(-1);
	}

	/* parent */
	if (waitpid(cpid, &status, 0) == -1) {
		perror("waitpid failed");
		return -1;
	}
	if (WIFSIGNALED(status)) {
		perror("exit by signal");
		return -1;
	}
	if (!WIFEXITED(status)) {
		perror("exit abnormally");
		return -1;
	}
	if (WIFEXITED(status) && WEXITSTATUS(status)) {
		perror("child return error");
		return -1;
	}

	return 0;
}

int main(int argc, char **argv)
{
	FILE *fp;

	/* touch /opt/.factoryreset */
	fp = fopen(RESET_FLAG_FILE, "w");
	if (fp == NULL) {
		perror("reset flg file open error");
		return -1;
	}
	fclose(fp);

	run_factory_reset();

	/* unlink /opt/.factoryreset */
	unlink(RESET_FLAG_FILE);
	sync();

	reboot(RB_AUTOBOOT);

	return 0;
}