Someone

while (my @ready = $s->can_read()) { 
	my $buff;
	my $res = sysread($fh, $buff, 4294967296);
	if ($res > 0) { 
		$results{$host} .= $buff;
	}
	elsif (defined $res) { 
		delete $results{$fh} if ( $res == 0);
		
	}
	else { 
#	$res is undef, so tell our user about the error
		print "Something broke!\n";
	}
}