When duplicati (duplicati gui?) is run from a terminal, and it recieves a keyboard interrupt (crtl-C) it instantly quits. To avoid accidentily shutdown, it would be much saver to ask for the user for confirmation (Exit duplicati? [yn]), similar to the jupiter project.
That’s a nice idea - though I might push it one level further and try to match the options provided when you stop it in the GUI, so offer something like:
Exit Duplicati? Yes, No, After current upload [Yna]