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? Jürg
