Which init system for Debian?

Posted Nov 15, 2013 23:50 UTC (Fri) by nix (subscriber, #2304)
In reply to: Which init system for Debian? by anselm
Parent article: Which init system for Debian?

... though, of course, if this information was actually useful systemd would be able to use it rather than cgroups.

What we really need is an option (inherited or systemwide, it doesn't matter) forcing *all* SIGCHLDs to go to PID 1, even if they also go to their real parent. But this is hard to implement in practice because the first thing you do on receipt of a SIGCHLD is reap the child, and you can't have two processes reaping the same child... not even a hack where PID 1's reap doesn't actually make the child go away if it has a live parent would work (the live parent could get to it first, leaving PID 1 with nothing to see).

Gah. Everything around child process management in Unix is just a horror. No wonder ptrace(), which builds on it in a halfwitted and agonizing fashion and has just the same problem with a process with 'two parents', is so horrible to use.