On Mon, May 25, 2020 at 1:25 AM Serhiy Storchaka <storch...@gmail.com> wrote:
>
> 24.05.20 17:48, Eric V. Smith пише:
> > Does anyone have an opinion on https://bugs.python.org/issue39673? It
> > maps ETIME to TimeoutError, in addition to the already existing ETIMEDOUT.
> >
> > http://man7.org/linux/man-pages/man3/errno.3.html says:
> >
> >         *ETIME *Timer expired (POSIX.1 (XSI STREAMS option)).
> >
> >                         (POSIX.1 says "STREAMioctl(2)  
> > <http://man7.org/linux/man-pages/man2/ioctl.2.html>  timeout".)
> >
> >         *ETIMEDOUT *Connection timed out (POSIX.1-2001).
> >
> >
> > It seems like a reasonable change to me, but I'm not a subject matter
> > expert on STREAMS, or what other affect this might have.
>
> Why it was not mapped at first place? Was there any discussion?

AFAICT from a few minutes of searching, ETIME is almost never used,
which probably explains it. It doesn't show up in glibc at all, and
only a few times in the Linux kernel sources, most notably in the
graphics subsystem -- and apparently this causes some annoyance for
the *BSDs, which share a bunch of that code and don't have ETIME, so
they #define ETIME ETIMEDOUT to get the code to build.

I'm not sure there's any point in making the change – the BPO doesn't
even have an example of it, just someone who was poking around in
obscure corners of errno and noticed it – but it seems harmless. It
sounds like literally no-one knows what the difference between these
is supposed to be.

-n

-- 
Nathaniel J. Smith -- https://vorpus.org
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