Help Required in modifying dwm in Ubuntu

I want to create a utility which performs the functions of dwm but not the way presently it is. When i press quit key, irrespective of unsaved files, opened and edited notes, the quit function kills all of them instantly. is there a way to apply a script or a wrapper to avoid killing entire tasks in one instant? When the user presses quit button, how to display the unsaved list of files to the user? atleast how to retrieve the list of files which are getting affected?