On Tue, Sep 02, 2008 at 10:41:03AM +0100, Darren J Moffat wrote:

> I can't work out a case where $PWD would be valid yet os.getcwd() failed.  
> Surely $PWD is less useful than os.getcwd() since if the later failed 
> chances are $PWD was just the value it would have returned if the directory 
> hadn't been removed.

All we need is a path -- it doesn't actually need to exist.  The point is,
if you're sitting in a directory that's part of an image -- even if that
directory gets removed from underneath you, you're still underneath the
image root, and the path is still valid for our purposes.

Danek
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