popen bug, extension

[Eric Blake]

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According to Jeff Johnston on 8/18/2009 10:17 AM:
> Hi Eric,
> 
> Go ahead and commit.  Just fix the typo "wries" in your documentation.
> 
> 2009-08-18  Eric Blake  <ebb9@byu.net>
> 
>     Improve popen compatibility with glibc.
>     * libc/posix/popen.c (popen): The 2006-08-22 change to use
>     FD_CLOEXEC disagrees with other implementations; instead, use
>     pidlist to work even when fcntl is not available.  Meanwhile,
>     support the 'e' modifier to set CLOEXEC, as in glibc.  Drop
>     cygwin-specific code, now that cygwin has its own version.
>     * libc/posix/Makefile.am (CHEWOUT_FILES): Document popen.
>     * libc/posix/posix.tex: New file.

Done with the corrected docs.  However, I did not regenerate Makefile.in,
as I don't have my environment set up for that at the moment.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             ebb9@byu.net
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