Method signal_handler

vmm/src/lib.rs:699–731

(
        mut signals: Signals,
        original_termios_opt: &Mutex<Option<termios>>,
        exit_evt: &EventFd,
    )

    pub const HANDLED_SIGNALS: [i32; 2] = [SIGTERM, SIGINT];

    fn signal_handler(
        mut signals: Signals,
        original_termios_opt: &Mutex<Option<termios>>,
        exit_evt: &EventFd,
    ) {
        for sig in &Self::HANDLED_SIGNALS {
            unblock_signal(*sig).unwrap();
        }

        for signal in signals.forever() {
            match signal {
                #[allow(clippy::collapsible_match)]
                SIGTERM | SIGINT => {
                    if exit_evt.write(1).is_err() {
                        // Resetting the terminal is usually done as the VMM exits
                        if let Ok(lock) = original_termios_opt.lock() {
                            if let Some(termios) = *lock {
                                // SAFETY: FFI call
                                let _ = unsafe {
                                    tcsetattr(stdout().lock().as_raw_fd(), TCSANOW, &termios)
                                };
                            }
                        } else {
                            warn!("Failed to lock original termios");
                        }

                        std::process::exit(1);
                    }
                }
                _ => (),
            }
        }
    }

    fn setup_signal_handler(&mut self, landlock_enable: bool) -> Result<()> {
        let signals = Signals::new(Self::HANDLED_SIGNALS);