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

int main() {
#if defined (_POSIX_JOB_CONTROL)
	printf("job control is supported\n");
	printf("before setpgid, pid = %d, pgid = %d\n", getpid(), getpgrp());

	setpgid(0,getppid());
	printf("after setpgid, pid = %d, pgid = %d\n", getpid(), getpgrp());
	while (1) {
		pause();
	}
	exit(EXIT_SUCCESS);
#else
	printf("job control is not supported\n");
	exit(EXIT_SUCCESS);
#endif
}