[Freeswitch-users] Assigning a variable with a value from a system command?

Hi. I have a need to assign a variable in vars.xml with the value output from a system command (in this specific instance "hostname -s", but I'd like to have a generic solution for future use). How can I do that? Any suggestions are welcome, as is pointing at any documentation I've so far failed to find :) Thanks, Antony. -- Having been asked for a reference for this man, I can confirm that you will be very lucky indeed if you can get him to work for you. Please reply to the list; please *don't* CC me.