| User interface basics / Establish a GUI front-end connection | |
When setting the FGLGUIDEBUG environment variable to 1, information about GUI communication will be printed to stderr by the runtime system, and the GUI protocol exchange will be indented for a better readability in the front-end log window.
UNIX™ (shell) example:
$ FGLGUIDEBUG=1 $ export FGLGUIDEBUG $ fglrun myprog 2>guidbg.txt
Note that in TUI mode, displayed screens can be dumped by setting the DBSCREENDUMP or DBSCREENOUT environment variables. This can be used to take a snapshot of the current TUI screen, for debugging or testing purpose.