* Jürg Billeter: > On Thu, 2018-12-06 at 14:12 +0100, Florian Weimer wrote: >> * Jürg Billeter: >> >> > On Thu, 2018-12-06 at 13:30 +0100, Florian Weimer wrote: >> > > * Christian Brauner: >> > > >> > > > /* zombies */ >> > > > Zombies can be signaled just as any other process. No special error will be >> > > > reported since a zombie state is an unreliable state (cf. [3]). >> > > >> > > I still disagree with this analysis. If I know that the target process >> > > is still alive, and it is not, this is a persistent error condition >> > > which can be reliably reported. Given that someone might send SIGKILL >> > > to the process behind my back, detecting this error condition could be >> > > useful. >> > >> > As I understand it, kill() behaves the same way. I think it's good that >> > this new syscall keeps the behavior as close as possible to kill(). >> >> No, kill does not behave in this way because the PID can be reused. >> The error condition is not stable there. > > The PID can't be reused as long as it's a zombie. It can only be reused > when it has been wait()ed for. Or am I misunderstanding something? Hmm, that's a fair point. So the original interface is just broken. Florian
