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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug nptl/29029] poll() spuriously returns EINTR during thread
 cancellation and with cancellation disabled
Date: Wed, 06 Apr 2022 13:31:57 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29029

--- Comment #3 from Florian Weimer <fweimer at redhat dot com> ---
Well, I spoke to soon, it's actually documented in signal(7):

=E2=80=9C
       The following interfaces are never restarted after being
       interrupted by a signal handler, regardless of the use of
       SA_RESTART; they always fail with the error EINTR when
       interrupted by a signal handler:
=E2=80=9D

<https://man7.org/linux/man-pages/man7/signal.7.html>

I think that explains why glibc used the old, more complex code: it may be
required for POSIX conformance.

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