On 02/10, Christian Brauner wrote: > > The question is what is more useful for userspace when they do: > pidfd_send_signal(1234, PIDFD_SEND_PROCESS_GROUP)? > > (1) They either mean to signal a process group that is headed by 1234. Yes, this is what I had in mind, see also another email from me. Simple, clear, and matches kill(-1234). > (2) Or they want to signal a process group of which 1234 is a member or > the leader. Somehow I didn't even consider this option when I thought about PIDFD_SIGNAL_PGRP... > From a usability perspective (1) is a lot more restrictive because it > requires @pidfd to refer to a process group leader. Yes, but to be honest (2) doesn't fit my head. Probably simply because I always had (1) in mind... But I won't argue if you think that (2) has useful usecases. Oleg.
