Re: [PATCH 01/11] fs: add O_BENEATH_ONLY flag to openat(2)

On Tue, Jul 08, 2014 at 02:04:45PM +0100, Meredydd Luff wrote:

On 8 July 2014 13:51, Christoph Hellwig [off-list ref] wrote:

quoted

Yeah, it won't work for an explicit directory - I was thinking of
working relative to $CWD.

I think that would sacrifice far too much flexibility. Even without
Capsicum, it would be worthwhile to be able to wire up a static
seccomp-bpf filter to enforce constraints such as "you can open files
under fd#5 for reading, but you can only write to files under fd#6,
and you can't do any global lookups."

Yeah, I didn't intend to advocate this further after your reply.