[systemd-devel] some issues with missing HAVE_SYSV_COMPAT and /run/lock

[Gustavo Sverzut Barbieri]

On Wed, Apr 6, 2011 at 2:42 PM, Kay Sievers <kay.sievers at vrfy.org> wrote:
> On Wed, Apr 6, 2011 at 16:35, Marius Tolzmann <tolzmann at molgen.mpg.de> wrote:
>> On 04/06/11 16:01, Lennart Poettering wrote:
>>> On Wed, 06.04.11 15:30, Marius Tolzmann (tolzmann at molgen.mpg.de) wrote:
>>>
>>>> * /run/lock is not mounted/created since tmpfiles.d/legacy.conf is not
>>>>   installed (?)
>>>
>>> Yes, correct.
>>>
>>>> So how am i supposed to fix the missing /run/lock issue? i thought
>>>> systemd would be responsible for creating this or mounting some tmpfs
>>>> (i don't know the status quo in the /run / lock / lockdev discussion ;)
>>>
>>> Well, we came to the conclusion that /var/lock is just completely broken
>>> and we only want it on systems caring for legacy support. On legacy-free
>>> systems that dir shouldn't exist (or at least systemd should not create
>>> it) since it is deeply broken and we shouldn't bless something that
>>> broken.
>>
>> so what is the replacement dir for /var/lock? wasn't it /run/lock?
>>
>> if it was: how can i fix the missing /run/lock issue on a system without
>> legacy support (e.g. legacy.conf)?
>>
>> i am a bit confused here since legacy.conf seems to be responsible for
>> creating /run/lock stuff which isn't the legacy way to do it (?) but the
>> proposed new way of handling lockfiles [since /run is new] (?)
>>
>> or is it that i don't need /run/lock at all?
>>
>> or short: where are my lockfiles supposed to go with systemd v23? 8)
>>
>> i really like all the cleanup stuff systemd brings to the gnu/linux
>> world but it is sometimes very confusing... 8)
>
> Nothing remotely sane should ever create files with a magically (the
> magic is not even defined) encoded filenames in it, to coordinate
> access to a device.
>
> It's one of the things where "unix" had really no idea what they are
> doing, regardless that it's ugly as hell, it just can't work reliably
> ever.
>
> Just drop all that utter nonsense if you don't need it, and use proper
> locks on the device node that go away when the locking process dies.
>
> We really don't want that in systemd for new systems.

Marius, do you see anything using /var/lock? At least on my Gentoo
it's not used (as expected). /var/run (/run) OTOH is full of users :-)


-- 
Gustavo Sverzut Barbieri
http://profusion.mobi embedded systems
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