On Tue, Feb 10, 2009 at 03:48:36PM -0600, Shawn Walker wrote:

> I'm not sure how the seek/tell dance could be accomplished to calculate a 
> hash at first glance,

Sorry; I must have gotten mixed up -- it would be a way to set the size of
/dev/null to zero without having to stat it or read its data, not to
compute the hash.

> although calculating file size makes sense.
>
> What about this?
>
>         fhash = sha.new()
>         while length > 0:
>                 data = f.read(min(bufsz, length))
>                 fhash.update(data)
>                 l = len(data)
>                 if l == 0:
>                         length = 0
>                 else:
>                         length -= l
>         f.close()

Won't that still loop forever?  Perhaps you meant "if l == 0: break"?

Explicitly setting pkg.size for /dev/null may still be the way to go.

Danek
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