DoUnlock(string reason)
{
    llOwnerSay(reason + ". Sending unlock commands.");
    llMessageLinked(LINK_SET, 4, "var lock 0 0", NULL_KEY);
    llMessageLinked(LINK_SET, 5, "var lock 0 OFF", NULL_KEY);
}

default
{
    state_entry()
    {
        llListen(1, "", llGetOwner(), "unlock");
        DoUnlock("Locksmith script (re)starting");
    }

    listen(integer c, string s, key k, string m)
    {
        DoUnlock("'/1 unlock' received");
    }

    link_message(integer sn, integer n, string s, key k)
    {
        if (llGetSubString(s, 0, 9) == "var lock 1") {
            llSleep(1.0);
            DoUnlock("Attempt to lock HUD detected");
        }
    }
}