Re: [Lsf-pc] [LSF/MM ATTEND] Richacls

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On Tue, Jan 13, 2015 at 04:16:13PM -0500, J. Bruce Fields wrote:
> 
> Right, but look at the case above carefully again--it's *much* more
> special than the one the container people hit.
> 
> You can absolutely still represent weird modes like 026 with a Richacl
> and it will deny permissions in the traditional way.
> 
> What you can't do is represent the above POSIX ACL.
> 
> This is a case that you can *only* hit with POSIX ACLs (not with mode
> bits).  And that's because the POSIX ACL is doing something bizarre and
> useless that I've never seen any other ACL system do (denying read and
> write together when each would be permitted separately).
> 
> Using the usual "if a tree fell in a forest and nobody heard it..."
> criterion, I think this change would be unlikely to cause us trouble.

Agreed. I scratched my head and simply couln't think of a
case where this could affect security of the system - only
backwards bug compatibility.
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