Use EVFILT_SIGNAL for kqueue-enabled systems
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notgull commented
kqueue supports EVFILT_SIGNAL, which would allow us to wait on a signal without needing to use a pipe. I'm working on exposing this functionality in async-io via smol-rs/async-io#112. However, this would require setting up an executor to listen for signals.
notgull commented
Not really needed and it might have surprising behavior that I don't want to deal with.