[systemd-devel] systemd-timesyncd with read-only root filesystem

[Tomasz Torcz]

On Fri, Dec 09, 2016 at 10:46:51AM +0100, André Hartmann wrote:
> Hi Martin,
> 
> thanks for keeping our dialog alive :)
> 
> To sum up again what I actually want to achive:
> 
> I want to use NTP after bootup by default, but in case no NTP is available,
> the user should be able to set the date and time by hand
> with timedatectl. But timedatectl refuses to do so, if "NTP is enabled".
> 
> And this is my main problem: I don't know how timedatectl decides
> if NTP is enabled or not.

  Just use the source code? Anyway, if you use systemd's implementation
of that API (systemd-timesyncd), the check is here:
https://github.com/systemd/systemd/blob/master/src/timedate/timedated.c#L180

i.e. timedated checks if systemd-timesyncd is enabled.

  If you use other implementations, the check can be different.
For example timedatex checks if any of units listed in
/etc/systemd/ntp-units.d:/usr/lib/systemd/ntp-units.d
is enabled.

  Implementation in systembsd runs "/etc/rc.d/ntpd status" and checks status.

  And so on.

-- 
Tomasz   .. oo o.   oo o. .o   .o o. o. oo o.   ..
Torcz    .. .o .o   .o .o oo   oo .o .. .. oo   oo
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