[cap-talk] More Heresey: ACLs not inherently bad
Jonathan S. Shapiro
shap at eros-os.com
Wed Sep 10 05:30:00 CDT 2008
On Tue, 2008-09-09 at 20:30 -0700, Charles Landau wrote:
> Jed Donnelley wrote:
> > Sorry - I was clear on that. I shouldn't have included the leaf
> > object in the above <> (see below as to what I was thinking). What
> > I don't understand is how such a directory-like object distinguishes
> > between a fetch by the "new process" from a fetch by some other
> > process (old process). Are you imagining some Horton-like mechanism
> > where the relevant processes get different capabilities to the
> > directory-like object so that the directory-like object can
> > distinguish the fetches?
> Each time you pass a different set of capabilities to a process, you
> construct a new directory-like object that will give access to that set.
> So in general, different processes will receive capabilities to
> different directory-like objects. It needn't use Horton.
This is precisely the operation that is both performance prohibitive and
(human) complexity prohibitive. It will turn out that humans can't make
the necessary decisions to decide what goes in to those directories.
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