Марк Коренберг added the comment:

Calling getdents()/readdir64() repeatedly while closing descriptors provides 
unexpected behaviour. Reading directory while it modified is not safe by 
default. For example: http://en.it-usenet.org/thread/18514/15719/. 

So, we should re-open directory if we received full array of structures. I 
don't know if just lseek(dirfd, 0) sufficies.

Please reopen bug, as Linux behaviour of stable reading /proc/<pid>/fd may be 
broken in future without any error at python side (!) (typically, second call 
returns empty list if dir was modified)

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nosy: +mmarkk

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<http://bugs.python.org/issue8052>
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