Function signal_hook::pipe::register_raw

pub fn register_raw(signal: c_int, pipe: RawFd) -> Result<SigId, Error>

Registers a write to a self-pipe whenever there's the signal.

In this case, the pipe is taken as the RawFd. It is still the caller's responsibility to close it.

Note that passing the wrong file descriptor won't cause UB, but can still lead to severe bugs ‒ like data corruptions in files.