#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sched.h>

int main(int argc, char **argv)
{
	int pid;
	struct sched_param sp = { .sched_priority = 5 };

	sched_setscheduler(getpid(), SCHED_FIFO, &sp);

	if ((pid = fork()) < 0) {
		perror("fork");
		exit(0);
	} else if (!pid) {
		printf("child!\n");
		exit(0);
	}

	printf("parent\n");
	exit(0);
}