Function sys_util::signal::register_signal_handler

pub unsafe fn register_signal_handler(
    num: c_int, 
    handler: extern "C" fn()
) -> Result<()>

Registers handler as the signal handler of signum num.

The value of num must be within [SIGRTMIN, SIGRTMAX] range.

This is considered unsafe because the given handler will be called asynchronously, interrupting whatever the thread was doing and therefore must only do async-signal-safe operations.