Messages in this thread | | | Date | Tue, 18 May 1999 10:02:34 +0200 | From | Alexander Kjeldaas <> | Subject | Re: More capabilities stuff... |
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On Sun, May 16, 1999 at 06:34:54AM -0400, John Wojtowicz wrote: > > >I suppose you intend to turn normal user abilities into default > >capabilities. (the ability to write to a writable file...) >
> That by definition isn't a privilege. If the file is writable by > that user, then the privilege for DAC write permission override > isn't needed to write it. However, the uid check should be short > circuited by the check DAC write permission override.
> I would believe that eventually you would want to convert all uid 0 > checks in the kernel to capabilities checks. Then if you've > compiled the kernel with out capabilities enabled, you'd dummy up > the effective, permitted and inheritable sets for all uid 0 > processes to have ALL privileges in it, and all other normal users > have NONE in their process capability sets. If it is enabled then > you perform the normal capabilities calculations whenever a process > is exec()'ed. Is this the plan Linus?
The above is generally what is happening in 2.2 - there are no checks for uid==0. In addition to the above, there is some capabilities conversions during set*id from/to uid 0.
astor
-- Alexander Kjeldaas, Fast Search & Transfer, Trondheim, Norway
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