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

[Stephen C. Tweedie]

Hi,

On Tue, Oct 24, 2000 at 09:20:05AM +0200, Ragnar Kj?rstad wrote:

> I don't know how much need there is for inheritence here, but if a lot
> of attributes will need it I think it should be supported in the
> interface instead. (though hardlinks really make this hard)

POSIX makes an unambiguous definition of inheritence --- inheritence
is applied on file creation.  Hard links only create a new directory
entry, not a file, so the ACLs on the linked file don't change.
Similar rules apply to rename.  Basically, you don't want things like
mv and ln to modify the ACLs on an existing file (although of course
the ACLs on the directory containing the new dirent may change the
effective permissions by removing the right to access the dirent in
the first place).

Cheers,
 Stephen
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