Re: [Openxdsm-devel] Re: [PROPOSAL] Extended attributes for Posix security extensions

[Hans Reiser]

"Stephen C. Tweedie" wrote:
> 
> Hi,
> 
> On Wed, Oct 25, 2000 at 09:39:05AM -0700, Hans Reiser wrote:
> 
> > > It is certainly _possible_ to allow ACLs to change on rename/link, but
> > > POSIX ACLs don't do that.  Other filesystems may well do.
> > >
> > Suppose /a is permissions 700 and /b is 777, and you rename /a/foo to /b/foo, you 
>have then changed
> > the permissions required for accessing the file.  Permissions ARE path traversal 
>dependent in Unix.
> > Inheritance of them should be also.
> 
> OK, we're agreeing on functionality and just using different
> terminology: the rename above doesn't change any properties of the
> file in question, but does affect the permissions on the full
> pathname.  The two are quite distinct in Unix.
> 
> --Stephen
I was at least awkward in my statement, and perhaps imprecise to the point of being 
buggy.  That
said, I can imagine both path dependent and path independent inheritance being useful. 
 It could be
useful to impose inheritance on children of a directory.

Hans
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