Re: CVS commit: src/tests/lib/libc/sys

[Taylor R Campbell <campbell+netbsd-source-changes-d%mumble.net@localhost>]

> Date: Thu, 14 May 2020 23:36:28 +0200
> From: Kamil Rytarowski <n54%gmx.com@localhost>
> 
> If a signal would not reach the child process (as it is ignored or
> masked+SA_IGNOREd) and it is not a crash signal, it is dropped. As I
> checked, it's the design in UNIX to overlook SIGCHLD signals in UNIX.
> Race free signals could be maybe possible, but with some design rethinking.

I don't understand -- are you saying that if I mask SIGCHLD, e.g. with
sigprocmask(SIG_BLOCK), then because sigprop[SIGCHLD] has SA_IGNORE
set, any SIGCHLD signals will be discarded while I have it masked?

This can't be right, so either I misunderstood what you're saying, or
something else is afoot with the test that is making it flaky, or
there's a bug in the kernel.