Captive Dialog Bash Menu (Repost)

A captive dialog (or like technology) bash menu written in C that is easily changed by management is what this company needs. We are attempting to provide access to technicians via shell and only allowing them to do certain things on the server based off of their UNIX group and user. This shell should keep the user from breaking out into any other shell and should be easily updatable by the Senior Systems Administrator. Furthermore, this shell should run on both Linux and BSD systems alike. For more information, please contact me by PM.