Expect - Interrupt program - Ctrl+C
To send a Ctrl+C, do:
send \x03To handle an incoming Ctrl+C, do:
trap {your handler script here} SIGINTYou might want to make the handler script (which can be a multi-line thing) send the signal on to the inner process…
trap { send \x03 send_user "You pressed Ctrl+C\n"} SIGINTBut take care! When the user presses Ctrl+C in a text-mode program (in most GUIs, it's a copy action) they are usually expecting it to go away pretty soon, so you should take care to ensure that you don't spend too long after the signal arrives cleaning everything up.