[Bug libc/12724] fclose violates POSIX 2008 on seekable input streams

["matz at suse dot de" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=12724

Michael Matz <matz at suse dot de> changed:

           What    |Removed                     |Added
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                 CC|                            |matz at suse dot de

--- Comment #3 from Michael Matz <matz at suse dot de> 2011-08-12 15:31:21 UTC ---
Over at SuSE we ran into issues with this change.  See
  https://bugzilla.novell.com/show_bug.cgi?id=711829
.  Ruby does a dup/fdopen, but then doesn't do any reading/writing with 
the new stream, and when it gets fclosed the file position is reset also
for the other stream associated with the same file.  That one does
reads/writes.

I believe that's exactly the interaction between active/inactive streams
that http://austingroupbugs.net/view.php?id=87#c895 is talking about.

Now, that may or may not be useless code in ruby, but there we are.
The current half-POSIX-compliant way is worse than either the non-compliant
or the compliant way.

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