/*
 * Copyright 2011 Stefan Lankes, 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 <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/wait.h>

int main(int argc, char** argv)
{
	int status = 0;
	pid_t pid, mypid = getpid();

	printf("Create child process...\n");

	pid = fork();
	if (pid == 0) { // child
		char* newargs[] = {"/bin/hello", "one", "two", "three", NULL};
		char* newenv[] = {"USER=root", "PATH=/bin:/sbin:/usr/bin", "PWD=/", "TEMP=/tmp", NULL};

		mypid = getpid();
		printf("Hello from child process! mypid = %u\n", mypid);
		execve("/bin/hello", newargs, newenv);

		return errno;
	} else {
		mypid = getpid();
		printf("Hello from parent process! pid = %u, mypid = %u\n", pid, mypid);
		wait(&status);
		printf("Child terminated with status %d\n", status);
	}

	return errno;
}