Re: [PATCH 1/4] fs: Implement close-on-fork

On Wed, Apr 22, 2020 at 03:36:09PM +0000, Karstens, Nate wrote:

There was some skepticism about whether our practice of
closing/reopening sockets was advisable. Regardless, it does expose what
I believe to be something that was overlooked in the forking process
model. We posted two solutions to the Austin Group defect tracker:

I don't think it was "overlooked" at all.  It's not safe to call system()
from a threaded app.  That's all.  It's right there in the DESCRIPTION:

   The system() function need not be thread-safe.
https://pubs.opengroup.org/onlinepubs/9699919799/functions/system.html

Ultimately the Austin Group felt that close-on-fork
was the preferred approach. I think it's also worth
pointing that out Solaris reportedly has this feature
(https://www.mail-archive.com/austin-group-l@opengroup.org/msg05359.html).

I am perplexed that the Austin Group thought this was a good idea.