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l1c4c5
1998 Mar 12
0
Re: Re: Re: Towards a solution of tmp-file problems
...levels below it, but compartments do not dominate
each other. i.e. a process at level 2 compartments 4 and 5 "dominates"
anything at level 1 or level 2 with either no compartments,
compartment 4, compartment 5 or both compartments 4 and 5. (i.e. l1,
l1c4, l1c5, l1c4c5, l2, l2c4, l2c5, l2c4c5). The implementation I know
uses a mixture of modified kernel and modified file systems. Processes
are allowed to read down (i.e. read anything they dominate) but "write
up" in other words they can only write at their own level or something
even more restrictive.
The relevant bit her...