[issue12898] add opendir() for POSIX platforms

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> I was proposing adding a function to open directory fds, because 
> there isn't one; fdlistdir(), like many other POSIX functions 
> available in Python, consumes directory fds.

I don't think I understand. This already works:

>>> fd = os.open("Misc", os.O_RDONLY)
>>> os.fdlistdir(fd)
['python.pc', 'README.coverity', 'ACKS.orig', 'NEWS.orig', 'HISTORY', 'python.man', 'valgrind-python.supp', 'TextMate', 'python-config.in', 'NEWS', 'RPM', 'vgrindefs', 'svnmap.txt', 'python-wing4.wpr', 'gdbinit', 'build.sh', 'README.AIX', 'Vim', 'SpecialBuilds.txt', 'indent.pro', 'python-wing3.wpr', 'ACKS', 'README', 'README.valgrind', 'Porting', 'python.pc.in']

Is there anything you want to do on a "directory fd" except listing its contents?

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<http://bugs.python.org/issue12898>
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