On 02/14/2010 12:55 AM, Don Stewart wrote:

juhe_xmonad:

...

Hello,

There is a startupHook in XConfig. I'm missing shutdownHook however. Is there any proper way to execute custom code when xmonad is about to exit?

xmonad exits by throwing an asynchronous exception from the inner loop out to main. The runtime catches this an exits gracefully.

You can write your own shutdown hook by catching this exception in your config main, and running your hook, before rethrowing.

I bet someone's already done this, and wrapped it up nicely, otherwise, look at Control.Exception in the Haskell base library for how to use the catch/handle functions.

Pseudocode:

import Control.Exception import XMonad

main = handle xmonad shutdown where shutdown e = do ... my action ... throw e

Thanks for quick response! -- Juraj