option to wait for pid file to appear

[h.reindl@xxxxxxxxxxxxx (Reindl Harald)]

Am 17.05.2018 um 22:54 schrieb Igor Bukanov:
> On 17 May 2018 at 19:23, Lennart Poettering <lennart at poettering.net> wrote:
> 
>> So yes, this is a bug in nginx. They really should fix that. And this
>> is not only broken when you use systemd, but on sysvinit too, as a
>> command like this would likely fail there too: "service nginx start
>> service nginx status", as the start would return before the PID file
>> is written, and then status would claim the service to be down...
> 
> Given that systemd deals with this situation in a very reasonable way,
> nginx must not be alone in doing this. And if this a common way to
> write such code, perhaps it should not be considered a bug but rather
> one more peculiarity of application services the service manager
> should deal....

why?

either fix the pidfile stuff in nginx or simply start supporting
"Type=notify" as a lot of other services already do

and NO i don't grasp why "live updates" need that at all instead have
main-pid as a tiny shim-controller which *never* exits at all