[question] shutdown event

Hello all !
I ask you guys if there is a shutdown event when the ctrl+s are done ? It's because I do a program that do something important and I don't want the user to shutdown the computer. If this event doesn't exist, is there a way to block ctrl+s ?
Thanks you.

That would be useful

ZudoHackz, on 26 November 2012 - 03:48 AM said:

That would be useful

That's why I ask for it XD

You can just modify coroutine.

local oldCo = coroutine.yeild
coroutine.yeild() = nil

Not sure if it works though.

Human, on 26 November 2012 - 04:00 AM said:

You can just modify coroutine.

local oldCo = coroutine.yeild
coroutine.yeild() = nil

Not sure if it works though.

So there is no event ? Because i don't understand what the coroutines are for so I don't want to touch it until I u'derstand it at least a bit…

bjornir90, on 26 November 2012 - 04:09 AM said:

Human, on 26 November 2012 - 04:00 AM said:

You can just modify coroutine.

 local oldCo = coroutine.yeild coroutine.yeild() = nil 

Not sure if it works though.

So there is no event ? Because i don't understand what the coroutines are for so I don't want to touch it until I u'derstand it at least a bit…

Well os.pullEvent uses coroutine thus making coroutine nil will stop coroutine and stop shutting down and restarting.

Human, on 26 November 2012 - 04:10 AM said:

bjornir90, on 26 November 2012 - 04:09 AM said:

Human, on 26 November 2012 - 04:00 AM said:

You can just modify coroutine.

 local oldCo = coroutine.yeild coroutine.yeild() = nil 

Not sure if it works though.

So there is no event ? Because i don't understand what the coroutines are for so I don't want to touch it until I u'derstand it at least a bit…

Well os.pullEvent uses coroutine thus making coroutine nil will stop coroutine and stop shutting down and restarting.

Ok thanks you but after I do that os.pullEvent wille not work anymore ?

However, if you do this, you definitely want to back up coroutine.yield to some other variable, then restore it. Because without that, read() won't even work. You won't be able to run a single program.

e.g.

cobackup = coroutine.yield
coroutine.yield = nil
-- Your Code Here
coroutine.yield = cobackup

Also, these events are hardcoded, so I'm not sure if that really would work.

TheHopefulNoob, on 26 November 2012 - 04:15 AM said:

However, if you do this, you definitely want to back up coroutine.yield to some other variable, then restore it. Because without that, read() won't even work. You won't be able to run a single program. Also, these events are hardcoded, so I'm not sure if that really would work.

If you looked at the code I did back it up. This is the only way I know of to stop shutting down though.

Thanks you all alot ! I will try this and see :D/>/>

What good does the event do if the computer shuts down?

ChunLing, on 26 November 2012 - 07:11 AM said:

What good does the event do if the computer shuts down?

One could have a program save data before the computer shuts down, maybe?

Then again, you could just have the program save said data and then shut the computer down, but it's always nice to have a fail safe when the user does it manually.

Human, on 26 November 2012 - 04:00 AM said:

You can just modify coroutine.

local oldCo = coroutine.yeild
coroutine.yeild() = nil

Not sure if it works though.

Don't suggest things like this without knowing what the consequences would actually be. If you corrected that piece of code so that it actually did what you think it should, all you'd do is cause the computer to throw an attempt to call nil error. You would not get around the shutdown or restart keys in any way, shape or form.

I guess someone should have answered the question, now that I think of it. When the user first presses Ctrl+S or Ctrl+R, the key events for the Ctrl key and the S or R keys are received like normal. So you should be able to do something like just have the computer write itself a file mentioning that it's getting a shutdown command (and delete that file a few seconds later if it turned out to be a false alarm).

Or, you could have the computer activate a deadly trap that will kill the user for their temerity. But beware of the false positive.

ChunLing, on 26 November 2012 - 02:06 PM said:

I guess someone should have answered the question, now that I think of it. When the user first presses Ctrl+S or Ctrl+R, the key events for the Ctrl key and the S or R keys are received like normal. So you should be able to do something like just have the computer write itself a file mentioning that it's getting a shutdown command (and delete that file a few seconds later if it turned out to be a false alarm).

Or, you could have the computer activate a deadly trap that will kill the user for their temerity. But beware of the false positive.

Yeah that's what I thougt first but I searched an easyer way to do that. Thanks you all. :)/>