Re: udev and DBUS

[David Zeuthen <david@fubar.dk>]

(for some reason it seems that linux-hotplug-devel rejects my mail once
in a while so if you reply, please quote in full)

On Thu, 2004-02-26 at 18:00, Marco d'Itri wrote:
> On Feb 26, David Zeuthen <david@fubar.dk> wrote:
> 
>  >Maybe we should remove dbus support from udev and distributions and/or
>  >hardware/hotplug abstractions like HAL can install their own callout
>  >scripts (side-question: is it now as easy to install a callout as with
>  >hotplug e.g. place an executable in /etc/hotplug.d/default/) which sends
>  >a dbus message to a well-defined service (in HAL's case this would be
>  >org.freedesktop.Hal.Manager).
> I'm not sure if this would work, because I think HAL wants to know which
> name has just been created by udev.
> 

Right - my suggestion was for HAL to install a callout in udev, a script
really, that sends a D-BUS message to the HAL service.

>  >What do you think?
> 
> Last week I added this to README.Debian:
> 
> D-BUS support
> ~~~~~~~~~~~~~
> It has been temporarily disabled for many reasons, among them it needing
> libraries in /usr/lib and introducing a pause of many seconds at boot time.
> A possible solution could be to build two versions of the daemon, start
> the bare one in the init script[1] and patch it to exit when SIGUSR1 has
> been received and the queue is empty.
> 
> 
> [1] or initrd or initramfs.

This could work as well, but it's really up to Greg to answer this one I
think. Since udev is now a daemon we should probably revisit D-BUS
support and add support for queries, I'll look into this.

Thanks,
David


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