On Fri, Jan 24, 2020 at 12:09:37PM -0800, Sargun Dhillon wrote: > On Fri, Jan 24, 2020 at 10:03 AM Tycho Andersen <tycho@xxxxxxxx> wrote: > > > > On Fri, Jan 24, 2020 at 01:17:42AM -0800, Sargun Dhillon wrote: > > > Currently, this just opens the group leader of the thread that triggere > > > the event, as pidfds (currently) are limited to group leaders. > > > > I don't love the semantics of this; when they're not limited to thread > > group leaders any more, we won't be able to change this. Is that work > > far off? > > > > Tycho > > We would be able to change this in the future if we introduced a flag like > SECCOMP_USER_NOTIF_FLAG_PIDFD_THREAD which would send a > pidfd that's for the thread, and not just the group leader. The flag could > either be XOR with SECCOMP_USER_NOTIF_FLAG_PIDFD, or > could require both. Alternatively, we can rename > SECCOMP_USER_NOTIF_FLAG_PIDFD to > SECCOMP_USER_NOTIF_FLAG_GROUP_LEADER_PIDFD. Ok, but then isn't this just another temporary API? Seems like it's worth waiting until the Right Way exists. Tycho
