is there a way to register for processes state changes from userspace ?

[Jason Ball]

Look at netlink sockets.
On 9 Jul 2015 5:08 pm, "Nikolay Borisov" <n.borisov.lkml at gmail.com> wrote:

>
>
> On 07/09/2015 09:39 AM, Ramon Fried wrote:
> > at the specific PID procfs directory.
> > Is there a better way to achieve that ? Something like netlink
> notifications for subscribed processes will be great...
> > Thanks.
>
> If your process is abruptly killed then there is no way for the process
> to tell you that (it's dead after all). Just implement a simple time-out
> mechanism in the spirit of ping.
>
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