service file docs?

[Michael Biebl]

Am 06.06.2014 13:56, schrieb Michael Meskes:
> Hi Michael,
> 
>> I think it’d be better if you posted what you already have and what
>> problem you are trying to solve.
> 
> Sure, no problem. Here's what I have:
> 
> ---
> [Unit]
> Description=Check And Enable File System Quotas
> Documentation=man:quotaon(8)
> DefaultDependencies=no
> After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service

This is a bit odd.

> Before=local-fs.target shutdown.target

Why the shutdown.target here? And do you really want to run the quota
script *before* the local file systems have been mounted?

> ConditionPathExists=/usr/share/quota/quotaon.sh

That seems unnecessary.
Since the service file is in /lib, it will be removed along with the
quotaon.sh script. So I don't see the need to explicitly test for it.

> 
> [Service]
> Type=oneshot
> RemainAfterExit=yes
> ExecStart=/usr/share/quota/quotaon.sh
> ExecStop=/usr/share/quota/quotaoff.sh
> StandardOutput=journal+console

Is there a need to divert from the default StandardOutput setting?

> 
> [Install]
> WantedBy=sysinit.target
> ---
> 
> AFAICT this works nicely on boot and on manual invocation after deactivating
> the systemd provided quotaon.service. What I'm trying to figure out is how to
> make sure my stop script gets called upon rebooting or halting. 

If you have DefaultDependencies=no and you want to have your service
stopped on shutdown, add
Conflicts=shutdown.target

> Also I have to figure out whether to integrate the logic of the systemd
> provided quotacheck.service and if so, how to. But first I got to get it
> running.

I think what's important is to avoid duplicating any functionality
between what is already provided by systemd.




-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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