1*d82e2864SMark Murray#!/usr/bin/perl
2*d82e2864SMark Murray
3*d82e2864SMark Murray#
4*d82e2864SMark Murray# Test program for /dev/urandom
5*d82e2864SMark Murray# Read and display random numbers.
6*d82e2864SMark Murray# This also reads /dev/zero to make sure there is no brokenness there.
7*d82e2864SMark Murray#
8*d82e2864SMark Murray#
9*d82e2864SMark Murray
10*d82e2864SMark Murrayopen(ZERO, "/dev/zero") || die "Cannot open /dev/zero - $!\n";
11*d82e2864SMark Murray
12*d82e2864SMark Murrayfor (;;) {
13*d82e2864SMark Murray	open(BIN, "/dev/urandom");
14*d82e2864SMark Murray	$len = sysread(BIN, $a, 20);
15*d82e2864SMark Murray	sysread(ZERO, $b, 20);
16*d82e2864SMark Murray	close(BIN);
17*d82e2864SMark Murray	if ($len > 0) {
18*d82e2864SMark Murray		for ($j = 0; $j < $len; $j += 2) {
19*d82e2864SMark Murray			$k = unpack("S", substr($a, $j, 2));
20*d82e2864SMark Murray			$z = unpack("S", substr($b, $j, 2));
21*d82e2864SMark Murray			$z == 0 || die "/dev/zero is returning non-zero!\n";
22*d82e2864SMark Murray			printf("%.4X ", $k);
23*d82e2864SMark Murray		}
24*d82e2864SMark Murray		printf "\n";
25*d82e2864SMark Murray	}
26*d82e2864SMark Murray}
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