#include <pthread.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>

void *thr(void *arg)
{
	for (;;)
		close(open("./test.dat", O_RDWR|O_CREAT, 0666));
	return (NULL);
}

int main()
{
	pthread_t td;

	pthread_create(&td, NULL, thr, NULL);
	for (;;)
		rfork(RFCFDG);
	return (0);
}