Startup/shutdown

I know there is a startup script, soo is there a shutdown one?

nope, you could override os.shutdown for your custom shutdown needs though

local oldShutdown = os.shutdown --# make a backup of the old function
function os.shutdown()
  --# add your custom shyutdown here

  oldShutdown() --#this is why we needed the backup
end

Of course, that'll only trigger if you specifically run a script that calls that doctored function. If the server shuts down or the computer's chunk unloads, the system will still simply shut off without running any special code.

so there is no script that fires before the computer shuts down

Edit: is there a way to turn off a computer on a lan network?

Bomb Bloke, on 21 March 2016 - 10:17 PM said:

Of course, that'll only trigger if you specifically run a script that calls that doctored function. If the server shuts down or the computer's chunk unloads, the system will still simply shut off without running any special code.

Lupus590, on 21 March 2016 - 10:15 PM said:

nope, you could override os.shutdown for your custom shutdown needs though

local oldShutdown = os.shutdown --# make a backup of the old function
function os.shutdown()
  --# add your custom shyutdown here

  oldShutdown() --#this is why we needed the backup
end

anyway to turn off computers on a lan network

Duster, on 21 March 2016 - 10:53 PM said:

anyway to turn off computers on a lan network

Yes, peripheral.find("computer").shutdown()
Although, this will not run os.shutdown(), so it can't be overriden.

what do you mean it doesnt run os.shutdown?

Anavrins, on 21 March 2016 - 11:32 PM said:

Duster, on 21 March 2016 - 10:53 PM said:

anyway to turn off computers on a lan network

Yes, peripheral.find("computer").shutdown()
Although, this will not run os.shutdown(), so it can't be overriden.

Anavrins, on 21 March 2016 - 11:32 PM said:

Duster, on 21 March 2016 - 10:53 PM said:

anyway to turn off computers on a lan network

Yes, peripheral.find("computer").shutdown()
Although, this will not run os.shutdown(), so it can't be overriden.

Doesn't this return an address (or side)?

peripheral.call(peripheral.find("computer"), "shutdown")

peripheral.wrap("computer").shutdown()

Shuts down wrapped computer

Creator, on 21 March 2016 - 11:41 PM said:

Anavrins, on 21 March 2016 - 11:32 PM said:

Duster, on 21 March 2016 - 10:53 PM said:

anyway to turn off computers on a lan network

Yes, peripheral.find("computer").shutdown()
Although, this will not run os.shutdown(), so it can't be overriden.

Doesn't this return an address (or side)?

peripheral.call(peripheral.find("computer"), "shutdown")

Moved to Ask a Pro.

Creator, on 21 March 2016 - 11:41 PM said:

Doesn't this return an address (or side)?

peripheral.find() returns wrapped peripherals, not strings.

It is possible to do stuff with the "side name" using its optional "function" parameter, though.

Another trick is that you can use that function to perform actions through all found peripherals. For example, if you wanted to shutdown ALL computers detected on the network, you'd do:

peripheral.find("computer", function(side, object) object.turnOff() end)

If you want to do your custom shutdown over lan then you will need something on every computer which listens for a rednet signal and then calls your custom shutdown.

your master computer then just sends the correct rednet signal to all of the computers

Ok ill try

Lupus590, on 22 March 2016 - 10:09 AM said:

If you want to do your custom shutdown over lan then you will need something on every computer which listens for a rednet signal and then calls your custom shutdown.

your master computer then just sends the correct rednet signal to all of the computers