#!/usr/bin/perl

use strict;
use warnings;

open my $fh, '<', '/dev/null';
binmode($fh);

my $buffer;

# read one byte
my $r = read($fh, $buffer, 1);

if($r > 0) {
	print "read something\n";
}
else {
	print "nothing to collect\n";
}

close($fh);