I need a scripting lanuage with case and shell commands
 

I want to set up a script that will let the users pick there window manager after boot up
to do this the script needs to read what X sockets are open it also needs to make a ~/link to the /etc/X11/xinit/xinirct.(window manager)
so I need a case statment to pick the window manager
and to find an open display to run another copy of X on
or I need goto to build the case so what scripting lanuage would work
for this
I have a full slack 9.1 distro installed

BASH