temporary su login

[gs_stoller at juno.com]

Robin Becker wrote:
> My collocation supplier is about to move our FreeBSD box and wants some 
> way to shut it down cleanly. Is there a simple way to allow a non-root 
> user to have shutdown rights without just giving them the world. At 
> present I don't even allow login via ssh on that box ie it's purely key 
> based.
	What I would do is develop a script (owned by  root ) and
callable by everybody which then checks the  user-id  of its caller,
and if it is an acceptable one, the script will issue a warning
(to wall) and then shutdown the system.