Hah, hadn&#x27;t thought of that. Kind of CPS for processes. I&#x27;m not sure what that would gain you, though, as you&#x27;d have to either a) write both the cd and the user of the cd, and there are less awkward ways to do that than exec&#x27;ing, or b) you&#x27;d have to pass something ELSE to exec to return control after cd finishes.<p>This seems a little awkward and I&#x27;m not sure what is being proven. :P