Here is a short script that uses the REBOL system-port to intercept "shutdown" types of interrupts from various operating systems.
Why? For example, you would want to do this if you had a REBOL server process on Linux that has internal state. You may want the chance to write out information to files before quitting. This is the code you need to make it happen. The code below will detect both CTRL-C and REBOL ESCAPE key. enable-system-trap: does [ ; Trap OS interrupts if not system/ports/system [ if none? attempt [system/ports/system: open [scheme: 'system]][ print "NOTE: Missing System Port" exit ] ] if find get-modes system/ports/system 'system-modes 'signal [ set-modes system/ports/system [ signal: intersect get-modes system/ports/system 'signal-names [ sigquit sigterm sigint sighup ] ] ] system/console/break: 'signal append system/ports/wait-list system/ports/system ] check-system-trap: func [port /local msg] [ ; Process OS interrupts if not port? port [return none] if any [port/scheme <> 'system port <> system/ports/system][return port] if not system/ports/system [return none] while [msg: pick system/ports/system 1] [ if find [signal escape] msg/1 [ print ["System Trap:" msg] ; (save files here) quit ] ] none ] print "Starting..." enable-system-trap forever [ wake-port: wait 20 ; timeout period check-system-trap wake-port ] -- To unsubscribe from this list, please send an email to [EMAIL PROTECTED] with "unsubscribe" in the subject, without the quotes.