Re: [gentoo-user] Safe systemd "reload" command

[Michael Orlitzky <mjo@gentoo.org>]

On 06/06/2016 06:04 PM, Tom H wrote:
> 
> 1) I've never used systemd on Gentoo but I assume that you can
> co-install openrc and systemd. So you'd want to check whether systemd
> is running:
> 
> [ -d /run/systemd/system ]
> 

I think the way I did this, it will be a no-op if systemd is not running
(or if e.g. spamd is not running *under* systemd). I committed the cron
job yesterday, so I'll hear about it if it doesn't work.


> 2) spamassassin.service is running
> 3) reload or restart spamassassin.service
> 
> systemctl try-reload-or-restart spamassassin.service
> if sa is running, it'll reload it if sa supports a reload, otherwise
> it'll restart it
> 

Ah, that sounds like an improvement. It looks like amavisd.service
supports reloading, but spamd.service doesn't. The way we do it in
spamd.init is to send a HUP signal to the spamd process (determined from
its PID file). Google tells me that

  ExecReload=/bin/kill -HUP $MAINPID

should work...