[systemd-devel] Why does sysv generator translate Required-Start keyword into an After= ordering dep only ?

[Francis Moreau]

On Tue, Mar 8, 2016 at 9:23 AM, Andrei Borzenkov <arvidjaar at gmail.com> wrote:
> 08.03.2016 11:07, Francis Moreau пишет:
>> On Tue, Mar 8, 2016 at 7:51 AM, Andrei Borzenkov <arvidjaar at gmail.com> wrote:
>>> 07.03.2016 10:04, Francis Moreau пишет:
>>>> Hello,
>>>>
>>>> Sorry for the long delay.
>>>>
>>>> On Fri, Feb 26, 2016 at 5:05 AM, Andrei Borzenkov <arvidjaar at gmail.com> wrote:
>>>>> 26.02.2016 00:55, Francis Moreau пишет:
>>>>>>
>>>>>> But now I'm wondering how the following case is handled: a sysinit
>>>>>> script "a" has "Required-Start: b". But "b" is a native systemd
>>>>>> service. I don't think the tool that enable/disable sysv services can
>>>>>> enable and order correctly the native service.
>>>>>>
>>>>>
>>>>> What difference does it make?
>>>>
>>>> The difference is that in my current understanding nothing will pull "b" in.
>>>
>>> That was answered in part you trimmed off. sysvinit never actively
>>> pulled "b" in either so nothing really changed here.
>>>
>>
>> In my understanding insserv is part of the sysvinit implementation.
>>
>> Therefore to enable a service with sysvinit, we do:
>>
>>  - insserv a (this will create S<xx>a *and* S<yy>b" with yy < xx)
>
> That would be new to me. insserv creates links ("enables") exactly those
> services that you specify. So if you say "insserv a" you will get only
> "a" enabled; this /may/ rearrange other services including "b" if they
> are already enabled but this will not enable "b".
>

That's how I understood Lennart's excerpt I was referring to previously.

-- 
Francis