[systemd-devel] [PATCH 2/5] udev: builtin - use RUN rather than IMPORT where it makes sense

[Kay Sievers]

On Mon, Mar 18, 2013 at 3:24 PM, Tom Gundersen <teg at jklm.no> wrote:
> On Mon, Mar 18, 2013 at 3:01 PM, Kay Sievers <kay at vrfy.org> wrote:

>> IMPORT is used to be called immediately and not be queued up to the
>> end of the rules handling, so that later rules could assume that this
>> rule has finished. PROGRAM would do the same as IMPORT and run
>> immediately, RUN always only happens at the very end, regardless where
>> it shows up in the sequence.
>>
>> Not sure if that matter in any interesting way, but it is surely a
>> different behaviour, and we should check that.
>
> Good point. I suppose it might be possible that later rules depend on
> modules/firmware being loaded, so RUN is probably the wrong choice.
> Any reason the ppdev module was loaded using RUN rather than IMPORT?

Hmm, there is probably nothing that replies on that stuff. We should
use one of the versions everywhere. But which one? :)

> I suppose this difference in execution between IMPORT/RUN/PROGRAM
> should be made clearer in the man page, I'll make a stab at it unless
> anyone beats me to it.

Yeah, "Add a program to the list of programs to be executed ..." is
not really telling the whole story, and that could be expressed
better.

Thanks,
Kay