1#include <stdio.h>
 2#include <unistd.h>
 3#include <sys/types.h>
 4#include <sys/stat.h>
 5#include <fcntl.h>
 6#include <stdlib.h>
 7
 8#define BUF_SIZE 256
 9int main(void)
10{
11	int fd = open("/dev/urandom", O_RDONLY);
12	int i;
13	char buf[BUF_SIZE];
14
15	if (fd < 0)
16		return 1;
17	for (i = 0; i < 4; ++i)
18		read(fd, buf, BUF_SIZE);
19
20	close(fd);
21	return 0;
22}