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    SubjectRe: Direct access to hardware
    According to James Sutherland:
    > On 21 Jul 2000, Miquel van Smoorenburg wrote:
    > > It _is_ possible. Check out "capabilities".
    > It isn't possible. Root can bypass them all completely, as long as
    > /dev/kmem etc. exist.

    If CAP_SYS_RAWIO isn't set, even root cannot open /dev/mem /dev/kmem
    and /dev/port. Read linux/char/mem.c, check open_port etc

    > Shall we delete capabilities on this basis? I think
    > not - so why apply that argument to Andre's bugfix?

    Well no, as many others have pointed out, it's the other way around-
    capabilities should be applied to everything that gives access to
    some hardware's firmware programming interface.

    Cistron Certified Internetwork Expert #1.

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