Function ctrlc2::try_set_handler

pub fn try_set_handler<F>(user_handler: F) -> Result<JoinHandle<()>, Error>
where
    F: FnMut() -> bool + 'static + Send,

The same as ctrlc2::set_handler but errors if a handler already exists for the signal(s).

Errors

Will return an error if another handler exists or if a system error occurred while setting the handler.