On Mon, Jul 7, 2014 at 1:20 PM, Paolo Bonzini [off-list ref] wrote:

Il 07/07/2014 12:29, David Drysdale ha scritto:

quoted

Capsicum capabilities are associated with the file descriptor (a la
F_GETFD), not the open file itself -- different FDs with different
associated rights can map to the same underlying open file.

Good to know, thanks.  I suppose you have testcases that cover this.

Paolo

Yeah, there's lots of tests at:
  https://github.com/google/capsicum-test
(which is in a separate repo so it's easy to run against
FreeBSD as well as the Linux code); in particular
  https://github.com/google/capsicum-test/blob/dev/capability-fd.cc
has various interactions of capability FDs.