Irregular Expressions

May 21 2010   12:37PM GMT

Biba explained – Part 4

Dan O'Connor Dan O'Connor Profile: Dan O'Connor

In the last section we left off on compartments and labels.  I think we have explained what and how the label works with the files and processes in a system, compartments have a good chance at making your head hurt.

Here is an example label with a compartment.

process     biba/50:5+6+7

Ok so what is this?  With the biba stuff in FreeBSD you can use ‘ps’ to report on the label that is applied to processes using the flag “-Z”.   The biba/ on the end is the actual label, I will break it down.

biba/50:5+6+7

The 50 ( between the / and the : ) is the level of the process, the numbers following the ‘:’ are the compartments that the process is assigned to. ( These are 0 – 255 )

In the next part we will go into how this effects how biba operates.

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