[systemd-devel] Antw: Re: Re: [EXT] Re: Q: Querying units for "what provides" a target

[Ulrich Windl]

>>> Michael Biebl <mbiebl at gmail.com> schrieb am 09.09.2022 um 12:31 in
Nachricht
<CAGWsdOhvoQds8WrruopEjcjeho9ncCGVb_emCnFwKS687t+j5w at mail.gmail.com>:
> Am Fr., 9. Sept. 2022 um 12:08 Uhr schrieb Ulrich Windl
> <Ulrich.Windl at rz.uni-regensburg.de>:
>>
>> >>> Michael Biebl <mbiebl at gmail.com> schrieb am 09.09.2022 um 10:55 in
>> Nachricht
>> <CAGWsdOibC4k0CqxubSRKRV3ZU=xPpdeMYGnA8b4sC80hMDbqOg at mail.gmail.com>:
>> > Example: syslog.service
>> >
>> > $ systemctl status syslog.service
>> > ● rsyslog.service - System Logging Service
>> >      Loaded: loaded (/lib/systemd/system/rsyslog.service; enabled;
>> > preset: enabled)
>> >      Active: active (running) since Thu 2022-09-08 08:55:45 CEST; 1 day
1h
>> > ago
>> > TriggeredBy: ● syslog.socket
>> >        Docs: man:rsyslogd(8)
>> >              man:rsyslog.conf(5)
>> >              https://www.rsyslog.com/doc/ 
>> >    Main PID: 624 (rsyslogd)
>> >       Tasks: 4 (limit: 19002)
>> >      Memory: 3.8M
>> >         CPU: 1.341s
>> >      CGroup: /system.slice/rsyslog.service
>> >              └─624 /usr/sbin/rsyslogd -n -iNONE
>> >
>> > You'll see that syslog.service is provided by  provided by
>> > rsyslog.service (and the actual name of the file on the disk)
>> > Isn't this what you wanted? If not, I must have misunderstood what you
>> > are looking for.
>>
>> Hi!
>>
>> I'm afraid that does not help:
>> # systemctl status time-set.target
>> ● time-set.target - System Time Set
>>      Loaded: loaded (/usr/lib/systemd/system/time-set.target; static)
>>      Active: active since Mon 2022-09-05 14:30:42 CEST; 3 days ago
>>        Docs: man:systemd.special(7)
>>
>> Now what is actually providing "time-set" (if any)?
>> Does that mean "nothing provides time-set"?
>>
>> Likewise:
>> # systemctl status time-sync.target
>> ● time-sync.target - System Time Synchronized
>>      Loaded: loaded (/usr/lib/systemd/system/time-sync.target; static)
>>      Active: active since Mon 2022-09-05 14:32:00 CEST; 3 days ago
>>        Docs: man:systemd.special(7)
>>
>> Sep 05 14:32:00 host16 systemd[1]: Reached target System Time
Synchronized.
>>
>> Clear now?
> 
> Not really.
> Are you interested in what services hook into time-sync.target (and
> are ordered before it)?

Yes. I call it "providing time set/sync".

Regards,
Ulrich