my $pid = fork();
if ($pid == 0) {
    sleep_count(3, 'Verifying with Nagios that resin is down: ');
}
else {
    my $nagios_check = `/usr/lib/nagios/plugins/check_http -H host.com -I $ip -p 80`;
    until ( $nagios_check !~ /HTTP OK HTTP\/1.0 200 OK/ ) {
        $nagios_check = `/usr/lib/nagios/plugins/check_http -H host.com -I $ip -p 80`;
        sleep 10;
    }
    waitpid($pid,0);
}