Proposed fix for issue 15256

[Denys Vlasenko]

(1) This can race with other signals.

(2) This allows SIGWINCH to "erase" a concurrently arriving signal.

I am trying to fix this instead by ignoring signals (poll returning EINTR)
which do *not* set bb_got_signal. (This needs a bit of surgery in hush
to not set it on SIGCHLD).

Please try current git.

On Tue, Jan 24, 2023 at 12:34 PM Marian Buschsieweke
<marian.buschsieweke at ovgu.de> wrote:
>
> Hi everyone,
>
> the attached patch fixes the issue
> https://bugs.busybox.net/show_bug.cgi?id=15256 for me. It is the same as the one uploaded in the issue report.
>
> Kind regards,
> Marian
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