Which is how the infamous self-pipe trick works: https://cr.yp.to/docs/selfpipe.html https://cr.yp.to/docs/selfpipe.html Nowadays signalfd and pidfd are the be

Which is how the infamous self-pipe trick works: https://cr.yp.to/docs/selfpipe.html https://cr.yp.to/docs/selfpipe.html Nowadays signalfd and pidfd are the better options.