my($handle, $port) = Net::Daemon::Test->Child
    ($numTests, $^X, 't/server', '--timeout', 20, '--mode=threads');


print "Making first connection to port $port...\n";
$fh = IO::Socket::INET->new('PeerAddr' => '127.0.0.1',
			    'PeerPort' => $port);
printf("%s 3\n", $fh ? "ok" : "not ok");
eval {
    for (my $i = 0;  $i < 20;  $i++) {
	if (!$fh->print("$i\n")  ||  !$fh->flush()) {
	    die "Error while writing $i: " . $fh->error() . " ($!)";
	}
	my $line = $fh->getline();
	die "Error while reading $i: " . $fh->error() . " ($!)"
	    unless defined($line);
	die "Result error: Expected " . ($i*2) . ", got $line"
	    unless ($line =~ /(\d+)/  &&  $1 == $i*2);
    }
};