Re: scratch/sigchld-fd 8f0ce42 1/2: Fix deadlock when receiving SIGCHLD during 'pselect'.

[Eli Zaretskii]

> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: emacs-devel@gnu.org,  phst@google.com,  p.stephani2@gmail.com
> Date: Wed, 20 Jan 2021 16:48:43 +0100
> 
> On Jan 20 2021, Eli Zaretskii wrote:
> 
> > So maybe this is the problem we should solve: make the SIGCHLD handler
> > reset the bit of the process's output from the fd_set passed to
> > pselect.
> 
> You cannot do that.  That creates races all over the place.

What kind of races, and where in our code? please elaborate.