Re: udev and dbus

[Patrick Mansfield <patmans@us.ibm.com>]

On Wed, Mar 10, 2004 at 11:18:06AM -0800, Greg KH wrote:
> On Wed, Mar 10, 2004 at 05:31:09PM +0100, David Zeuthen wrote:
> > 
> >  1. Remove dbus support from udev and make udev call /sbin/hotplug with
> >     a single positional parameter, 'udev', and the environment variables
> >     DEVPATH pointing to the appropriate directory in sysfs, ACTION
> >     assuming 'add' respectively 'remove' and DEVICE_FILE pointing to
> >     the created / removed special device file.
> > 
> >     This way, applications, like HAL, interested in the event can simply
> >     install a small program in /etc/hotplug.d/[udev,default] to do
> >     whatever they want with the event, like sending it to a daemon
> >     possibly through what may be the IPC-flavour of the month :-)
> > 
> >     (yes, this might be abusing the hotplug multiplexor)
> 
> Yes, that is abusing the hotplug multiplexor.  I don't like it :)

I like it. Why does the kernel get to abuse it but not user space ;-)

Then dbus or anyone can create an agent. And those wanting to
automatically mount devices, start applications, or setup dm have a nice
place to put their scripts. In a initrd/initramfs, you could even mount
and start init based on the root device showing up.

We should have a simple "your /dev/foo has arrived" interface.

-- Patrick Mansfield


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