SystemD Resolved

[Lucélio Gomes de Freitas]

Uau... Good...

Em 18-11-2011 19:03, Deron Meranda escreveu:
> On Fri, Nov 18, 2011 at 3:16 PM, Tom Horsley <horsley1953 at gmail.com> wrote:
>> On Fri, 18 Nov 2011 15:02:11 -0500
>> Deron Meranda wrote:
>>
>>> systemctl status pcscd.service
>>>
>>> grep pcscd /lib/systemd/system/*.service
>>>
>>>
>>> Does that work, or are you asking something more?
>> [root at zooty ~]# systemctl status pcscd.service
>> pcscd.service - PC/SC Smart Card Daemon
>>          Loaded: loaded (/lib/systemd/system/pcscd.service; disabled)
>>          Active: active (running) since Fri, 18 Nov 2011 04:02:03 -0500; 11h ago
>>        Main PID: 9613 (pcscd)
>>          CGroup: name=systemd:/system/pcscd.service
>>                  â 9613 /usr/sbin/pcscd -f
>>
>> That tells me it is running despite being disabled.
>>
>> [root at zooty ~]# grep pcscd /lib/systemd/system/*.service
>> /lib/systemd/system/pcscd.service:Requires=pcscd.socket
>> /lib/systemd/system/pcscd.service:ExecStart=/usr/sbin/pcscd -f
>> /lib/systemd/system/pcscd.service:ExecReload=/usr/sbin/pcscd -H
>> /lib/systemd/system/pcscd.service:Also=pcscd.socket
>>
>> That tells me no other service asks for it to be started
>> (directly, anyway).
>>
>> So, I'm still wondering why the heck it is running.
> Good question. I'm neither a systemd or pcscd expert.
>
> But from what I can tell, pcscd is started by a "trigger", rather than
> by a "runlevel". What happens is that systemd creates a Unix-domain
> socket for pcscd to eventually communicate with applications which use
> it. But the pcscd daemon process itself is not started right away.
>
> Instead systemd detects when an application attempts to connect to
> that Unix-domain socket, and at that time will start the pcscd
> process, passing it the socket descriptor. So in effect pcscd is
> started only when it is needed by an application.  I can't tell you
> want that application is though.
>
> The creation of the socket and the launching of the daemon are two
> separate systemd units:
>
>    systemctl status pcscd.socket
>    systemctl status pcscd.service
>
>
> Also see http://ludovicrousseau.blogspot.com/2011/11/pcscd-auto-start-using-systemd.html

-- 
Lucélio Gomes de Freitas
ETFCSF-> U.G.F.-> P.U.C.(RJ)
Engº, Analista Suporte(Free Mind).
Email: aa.lucelio at gmail.com
Tel: 55 0XX 21 85964911