[PATCH v3 1/4] seccomp: Add sysctl to display available actions

[Andy Lutomirski]

On Mon, Feb 13, 2017 at 7:45 PM, Tyler Hicks <tyhicks at canonical.com> wrote:
> This patch creates a read-only sysctl containing an ordered list of
> seccomp actions that the kernel supports. The ordering, from left to
> right, is the lowest action value (kill) to the highest action value
> (allow). Currently, a read of the sysctl file would return "kill trap
> errno trace allow". The contents of this sysctl file can be useful for
> userspace code as well as the system administrator.

Would this make more sense as a new seccomp(2) mode a la
SECCOMP_HAS_ACTION?  Then sandboxy things that have no fs access could
use it.

--Andy