You should have commented at https://news.ycombinator.com/item?id=11675129 https://news.ycombinator.com/item?id=11675129 . (-: Here, however, your audience has

You should have commented at https://news.ycombinator.com/item?id=11675129 https://news.ycombinator.com/item?id=11675129 . (-: Here, however, your audience has launchd, and has had for over a decade, running on top of Mach IPC; and BSD APIs such as kevent() for tracking forking processes.