Re: [PATCH 5/7] seccomp_filter: Document what seccomp_filter isand how it works.

[Steven Rostedt]

On Tue, 2011-05-03 at 03:47 +0200, Frederic Weisbecker wrote:
> 2011/5/3 Frederic Weisbecker <fweisbec@xxxxxxxxx>:

> Even better: applying a filter would always automatically be an
> intersection of the previous one.
> 
> If you do:
> 
> SECCOMP_FILTER_SET, __NR_foo, "a == 1 || a == 2"
> SECCOMP_FILTER_APPLY
> SECCOMP_FILTER_SET, __NR_foo, "b == 2"
> SECCOMP_FILTER_APPLY
> SECCOMP_FILTER_SET, __NR_foo, "c == 3"
> SECCOMP_FILTER_APPLY
> 
> The end result is:
> 
> "(a == 1 || a == 2) && b == 2  && c == 3"
> 

I'm a little confused. Why do we have both a FILTER_SET and a
FILTER_APPLY? Maybe this was discussed earlier in the thread and I
missed it or simply forgot.

Why not just apply on the set call?

-- Steve


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