Fri Mar 10 11:46:08 EST 2006 rsc
    This is definitely not correct.
    You can't re-chdir after every single command.
    That's going to slow tons of stuff, and
    it breaks interacting with acme (try cd /dev/acme/new
    multiple times).
    
    Even rewriting /dev/wdir after every command
    seems like overkill to me.  The vast majority 
    leave /dev/wdir correct.  
    
    I don't think there's a good solution.
    This one creates more problems than it solves
    (as do most).