Have CVS perform actions on all files before checking in?

[Schoep, Grant @ STORM]

Is it possible to have CVS perform some type of action on types of files
before checking it in? I'd like to configure our server for all java and C++
code to do some nicetys, like strip out ^M's and replace bloody tabs with
spaces where people put them in. Both actions I can manually do from the
command line fairly simply, but it would be great to have CVS just do it for
me(and everyone else).

For this I would definatly want to be able to specify what files it does it
to, as makefiles would get messed up if the tabs were gone.

Any ideas?
-grant