Experimental Physics and
Industrial Control System

"Chestnut, Ronald P." <[email protected]> · Thu, 22 Apr 2010 11:07:00 -0700

Carl,

I think the only solution is administrative, not technical. It involves instruction to the users and guidelines for EDM and script developers. One small technical thing to do is (figure out how to get and then) pass the "read-only-ness" into the scripts with a required (for script developers) parameter; or perhaps set an EDM-related environment variable which the scripts are required to honor.

For "dangerous" things, we sometimes put text on the EDM screen warning the user of possible side-effects.

Ron Chestnut 

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Carl Schumann
Sent: Thursday, April 22, 2010 10:50 AM
To: [email protected]
Subject: EDM's -ro option and running arbitrary scripts w/ in our case caputs

Hi,

Our EDM display authors frequently use EDM's shell widget to run 
scripts, including scripts that do 'caput's.   Such buttons/scripts 
appear to be able to do settings even when EDM is started with its -ro 
option.   While I can understand why this is so from a difficulty of 
implementation perspective it does seem to mislead the user.   Are my 
facts correct?  If yes, what does one do or think about it?

Thanks,
Carl Schumann

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System