Simple script that notifies you via IM, or email, when your sim has restarted

Sim Restart Notifier.lsl

//////////////////////////////////////////////////////////////////////
// Sim Restart Notifier -- By Antony Fairport
//
// Informs you when the sim it is located on restarts. Handy during
// rolling restarts when you've had to run away and want to be told
// as soon as it's back up.
//
// Revision history:
// ------------------------------------------------------------
//
// 2012-05-21
// Added more information to the notification (channel, version, etc)
// and also added the option to send an email instead of an IM.
//
// 2011-05-31
// First version.

//////////////////////////////////////////////////////////////////////
// Set the following to an email address if you want the restart
// notifier to send an email rather than send an IM. Leave it empty
// to get an IM instead.
string EMAIL_TO = "";

//////////////////////////////////////////////////////////////////////
// Gobals.
string g_sLastChannel = "";
string g_sLastVersion = "";
string g_sLastHost    = "";
string g_sLastRestart = "";

//////////////////////////////////////////////////////////////////////
// Format a llGetTimestamp()
string FormatTime( string sTime )
{
    list l = llParseString2List( sTime, [ "T", "." ], [] );
    
    return llList2String( l, 0 ) + " " + llList2String( l, 1 ) + " UTC";
}

//////////////////////////////////////////////////////////////////////
// Record details about the current server.
RememberServer()
{
    g_sLastChannel = llGetEnv( "sim_channel" );
    g_sLastVersion = llGetEnv( "sim_version" );
    g_sLastHost    = llGetSimulatorHostname();
}

//////////////////////////////////////////////////////////////////////
// Return details of a change (or not).
string Changed( string sOld, string sNew )
{
    if ( sOld != sNew )
    {
        return " (Changed. Was " + sOld + ")";
    }
    else
    {
        return "";
    }
}

//////////////////////////////////////////////////////////////////////
// Send out the information about the restart.
InformAboutRestart()
{
    // Remember the time of this restart.        
    g_sLastRestart = FormatTime( llGetTimestamp() );
    
    // The headline for the information.
    string sHeadline = llGetRegionName() + " has restarted.";
    
    // The body of the information.
    string s = sHeadline + "\n\n";
    
    // Get the current information about the region.
    string sChannel = llGetEnv( "sim_channel" );
    string sVersion = llGetEnv( "sim_version" );
    string sHost    = llGetSimulatorHostname();
    
    // Add the host/server details.
    s += "Channel: " + sChannel + Changed( g_sLastChannel, sChannel ) + "\n";
    s += "Version: " + sVersion + Changed( g_sLastVersion, sVersion ) + "\n";
    s += "Host: "    + sHost    + Changed( g_sLastHost,    sHost    ) + "\n";

    // Having compared, we remember the new server state.
    RememberServer();

    // If we have an email address...
    if ( EMAIL_TO != "" )
    {
        // ...send it as an email.
        llEmail( EMAIL_TO, sHeadline, s );
    }
    else
    {
        // No email address. Just IM it.
        llInstantMessage( llGetOwner(), s );
    }
}

//////////////////////////////////////////////////////////////////////
// Default state.
default
{
    //////////////////////////////////////////////////////////////////
    // State entry.
    state_entry()
    {
        // Remember the current details of the server.
        RememberServer();
    }

    //////////////////////////////////////////////////////////////////
    // Reset on rez.
    on_rez( integer start_param )
    {
        llResetScript();
    }
        
    //////////////////////////////////////////////////////////////////
    // React to a touch.
    touch_start( integer num_detected )
    {
        // If we don't have a last restart time...
        if ( g_sLastRestart == "" )
        {
            // ...so say.
            llWhisper( 0, "No restart has been recorded yet." );
        }
        else
        {
            // Otherwise say what the last recorded restart time is.
            llWhisper( 0, "Last restart was " + g_sLastRestart );
        }
    }
    
    //////////////////////////////////////////////////////////////////
    // React to changes.
    changed( integer change )
    {
        // If the region has started...
        if ( change & CHANGED_REGION_START )
        {
            // ...inform about the restart.
            InformAboutRestart();
        }
        // Reset if we're passed on.
        else if ( change & CHANGED_OWNER )
        {
            llResetScript();
        }
    }
}