MEDM's Shell Command + su

["Bertrand H.J. Biritz" <bbiritz@ucla.edu>]

Dear Tech-talk,

I am trying to implement the following:

using the MEDM's Shell Command object I would like to "su" into  
another account and launch a MEDM screen from there.

The idea is to have a regular detector operator not be able to change  
the demand voltage/current. Instead they need to click on the  
"configuration" button which will bring up the terminal window and ask  
them for the password.

Right now, when I use "su" it has me enter the password in clear text  
(i.e. it echo's it) and then fails.

Any thoughts on how to implement this? Should I use a shell script and  
call that from MEDM?

Thanks,
Bertrand