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Subject: [Bug 203162] when close(fd) on a fifo fails with EINTR, the file
 descriptor is not really closed
Date: Thu, 17 Sep 2015 01:10:59 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203162

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kib@FreeBSD.org

--- Comment #4 from Konstantin Belousov <kib@FreeBSD.org> ---
Created attachment 161136
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=161136&action=edit
A bit more fairness into the signal interruption of fifo open

The patch would prefer to return success over the EINTR when signal is
delivered while other end of fifo becomes ready simultaneously.

Note that the patch still does not fix the fundamental underground issue of the
troubles, which is in the test structure itself.  If child reader manages to
close fifo before the parent writer sleeping in open has a chance to run,
parent would deadlock, since nothing else would open the fifo for read.

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