[cap-talk] What are caps good for? "Encapsulation"? POLAvs. confinement

Jonathan S. Shapiro shap at eros-os.org
Sat May 8 07:23:55 EDT 2004


On Fri, 2004-05-07 at 23:20, David Chizmadia (JHU) wrote:
> As Shap explained
> confinement to me in the context of EROS, it is actually
> about ensuring that an agent can only interact with the
> outside world through its specified interfaces - *AND THAT
> THE OUTSIDE WORLD CAN ONLY INTERACT WITH THE AGENT THROUGH
> THOSE SAME INTERFACES*.

Shap didn't explain any such thing. Confinement only concerns *outward*
communication. It makes no guarantees or claims about the whether the
non-confined world is well behaved.




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