#! /usr/bin/perl -w
use strict;
use IO::Socket::INET;

$SIG{PIPE} = "IGNORE";
my $client;

sub call_server {
    my $answer;
    for (0..1) {
        return $answer if 
            $client and 
            print $client "some_command\n" and
            defined($answer = <$client>);
        $client = IO::Socket::INET->new(PeerAddr => "localhost",
                                        PeerPort => 16666) or
            die "Couldn't connect to server: $!";
    }
    die "Server in trouble";
}

foreach(1..10) {
   print call_server();
   sleep 10; # allow sometime to test server restart
}