[arch-projects] [initscripts][RFC] deprecating ck_depends

Tom Gundersen teg at jklm.no
Sat Jun 25 05:04:41 EDT 2011

On Sat, Jun 25, 2011 at 10:48 AM, Kurt J. Bosch
<kjb-temp-2009 at alpenjodel.de> wrote:
> Kurt J. Bosch, 2011-06-25 10:45:
>> Tom Gundersen, 2011-06-23 17:37:
>>> Hi guys,
>>> I'm trying to resolve FS#20903, and I think the only sensible solution
>>> is to
>>> stop using the ck_depends function. I'd like to hear your opinion on
>>> this.
>>> This is the situation:
>>> ck_depends was introduced in
>>> <http://projects.archlinux.org/initscripts.git/commit/?id=2c9681f461a0cde98a88de65e232369df68ed859>
>>> as a simple mechanism to implement dependencies.
>>> What it does, is that it allows an rc script to start other rc scripts.
>>> However, it is not equivalent to adding the depedent rc scripts to the
>>> array. The problem is that at shutdown, we have no record of when the
>>> dependencies were started, and therefore treat them as if they were
>>> started by
>>> the user during runtime.
>>> The end result is that the dependencies of a daemon are started before
>>> the
>>> daemon (as expected), but also stopped before the daemon (contrary to the
>>> expectation).
>>> I don't think parsing the rc scripts at shutdown to figure out the
>>> dependencies
>>> could work, nor do I think it is in the spirit of our initscripts. The
>>> only
>>> correct solution (IMHO) to resolve a dependency is to ask the user to
>>> add the
>>> relevant daemon to the DAEMONS array.
>>> I therefore suggest marking ck_depends as deprecated, and print a warning
>>> whenever it is used.
>>> Did I miss something? Any opinions?
>>> Cheers,
>>> Tom
>> ACK. Actually there already appears to be a warning at the very
>> beginning of function kicking in whenever a daemon is starting another
>> one. I'll just add a comment to ck_depends in my upcoming patches.
>> --
>> Kurt
> Nevermind it is already there. :/

Yeah, I added both those things after sending the email (there was a
discussion on IRC). The last remaining perpetrators are tracked here:


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