/*
 * Copyright 2013 Steffen Vogel, Chair for Operating Systems,
 *                               RWTH Aachen University
 *
 * 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.
 *
 * This file is part of MetalSVM.
 */

#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>

int main(int argc, char** argv)
{
	printf("======== USER: test forking...\n");

	int id = fork();
	int ret = 0;

	if (id < 0) {
		perror(" PARENT: fork");
		exit(-1);
	}
	else if (id == 0) {
		printf(" CHILD:   This is the child. My pid is %u\n", getpid());
		printf(" CHILD:   Running memtest...\n");

		const char *argv[] = {"/bin/memtest", "512", "kb", "10", NULL};
		execve(argv[0], argv, NULL);
		perror(" CHILD:   exec() returned: ");
		ret = -1;
	}
	else {
		printf(" PARENT:  Here is the parent. My pid is %u\n", getpid());

		wait(&ret);
		printf(" PARENT:  My child returned with code %i...\n", ret);
	}

	return ret;
}