signals

TF catches several signals from the OS and handles them specially:

SIGINT (normally generated by typing ^C): Aborts any running macro or blocking hostname resolution or connect, and offers a menu of choices:
C) continue tf; X) exit; T) disable triggers; P) kill processes.
SIGQUIT (normally generated by typing ^\): Prompts the user to quit. If the answer is 'y', TF will dump a core file if the OS supports it, and exit.
SIGTERM: Calls the SIGTERM hook, and then exits TF.
SIGHUP (normally generated when the terminal disconnects): Calls the SIGHUP hook, and then exits TF.
SIGUSR1: Calls the SIGUSR1 hook. TF does not exit.
SIGUSR2: Calls the SIGUSR2 hook. TF does not exit.
SIGTSTP (normally generated by typing ^Z): Suspends the TF process, like /suspend.
SIGWINCH (normally generated by resizing the terminal): Redraws the screen, and calls the RESIZE hook.