On Mon, Sep 7, 2020 at 4:38 PM Lennart Poettering
<lenn...@poettering.net> wrote:
>
> "React on the socket close?" — What do you mean by that?
>
I mean if my service explicitly calls close() then systemd could stop
the socket on its side so its are freed until the service is
restarted. I think it is what you described below.
> Note that on Linux you can invoke shutdown() on a listening socket
> (i.e. not just on the connection socket, but on a listening
> socket). iirc in that case systemd actually notices and will put the
> .socket unit in failure mode...
>
I looked at the code and there is:
if (state != SOCKET_LISTENING)
socket_unwatch_fds(s);
So I'm not sure how systemd can react on shutdown(). And I tried to
call shutdown() in my service but it has no effects.
> Would that work for you? (Maybe we could even tweak this a bit in
> systemd, so that when you invoke shutdown() on the socket systemd
> holds for you we do not consider that a failure anymore, but a clean
> way to tell systemd to stop the socket).
That is a good idea especially if systemd doesn't consider an error
when the service closes or shutdown the socket.
But again in the code I can see:
sd_event_add_io(UNIT(s)->manager->event, &p->event_source, p->fd,
EPOLLIN, socket_dispatch_io, p);
It seems that it only listens to "EPOLLIN" events. So it doesn't
listen to "EPOLLUP".
Thank you.
--
Francis
_______________________________________________
systemd-devel mailing list
systemd-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/systemd-devel
