On Mon, Feb 18, 2013 at 9:28 PM, lux-integ <lux-in...@btconnect.com> wrote:
> Greetings,
>
> I am new to this list and learning to write systemd service scripts. I would
> like to know if there are equivalents for the shell functions:-
>
> killproc()
> pidofproc()
>
> used heavily in init scripts and as described in linuxstandardbase (url below)
> http://refspecs.linuxbase.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-
> generic/iniscrptfunc.html
>
> If there are no such equivalents I would be gateful for guidance on the best
> way to stop daemons specifying their process_id and removing the said files
> when the daemon has stopped.
Usually you do not need such functions *at all* – systemd will
automatically find and kill the main process of your service. (They're
tracked using cgroups; you can see the processes of every service in
its `systemctl status`, or all services at once using `systemd-cgls`.)
For example, to start & stop the Racoon daemon, only these three lines
are needed:
[Service]
Type=forking
ExecStart=/usr/sbin/racoon
If the service writes a pidfile, you can tell systemd to use that with
the PIDFile= option.
> Also advice would be appreciated on whether in such scripts implementing
> ExecStop=
> then
> ExecStart=
>
> is the recommended way to restart daemons or whether/if there are generic
> 'systemd' ways to restart daemons.
The recommended way is to use `systemctl restart` (which simply stops
the daemon and starts it again).
--
Mantas Mikulėnas
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