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

[Andreas Schwab]

On Jan 19 2021, Eli Zaretskii wrote:

> I'd be happier if we had some direct evidence to these effects.  I'd
> also be surprised to hear that pselect doesn't return with EINTR when
> SIGCHLD comes in.  It is more likely that SIGCHLD is delivered before
> we call pselect, but if that is the case, we should be able to
> reliably detect that, I think.

If you want reliable detection of SIGCHLD, you need to block the signal
around pselect and let pselect unblock it, atomically.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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