Re: system(3) semantics when SIGCHLD is SIG_IGN'd

To: tech-userlevel%NetBSD.org@localhost
Subject: Re: system(3) semantics when SIGCHLD is SIG_IGN'd
From: David Holland <dholland-tech%netbsd.org@localhost>
Date: Sun, 20 Aug 2023 01:10:00 +0000

On Sat, Aug 12, 2023 at 11:58:36AM +0000, Taylor R Campbell wrote:
 > What should system(3) do when the signal action for SIGCHLD is
 > SIG_IGN, or has SA_NOCLDWAIT set?
 > [...]

My suggestion would be invent a new working mechanism for disowning
children and banish the mess to COMPAT_POSIX_MISTAKE.

I had never noticed this specific additional behavior that prohibits
wait(2) from operating properly; that makes the feature broken instead
of just messy and ugly.

-- 
David A. Holland
dholland%netbsd.org@localhost

References:
- system(3) semantics when SIGCHLD is SIG_IGN'd
  - From: Taylor R Campbell

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