> > - would it be a good idea to enclose variables in case expressions by
> > double quotes? 
> 
> Why?  If the arguments won't ever have spaces in them, as is the case
> for users and groups (I hope), there is no need to.

is it ensured that these arguments, i.e. these variables, can never be
empty?

-- 
Georg Schwarz    http://home.pages.de/~schwarz/
 georg.schwarz@freenet.de  +49 178 8545053