Re: New hotplug interface is not working right for me

["Eric S. Raymond" <esr@thyrsus.com>]

Greg KH <greg@kroah.com>:
> On Fri, Mar 11, 2005 at 12:20:54AM -0500, Eric S. Raymond wrote:
> > Greg KH <greg@kroah.com>:
> > > > The problem appears to be that whatever thread of control is creating 
> > > > the /dev/ttyUSB* node is running asynchronously with the hotplug
> > > > script and does not reliably (or even usually) create it before the
> > > > gpsd instance gets spawned and goes looking for the node.
> > > 
> > > Then use the /etc/dev.d/ interface instead.  That requires udev and a
> > > 2.6 kernel, but is the only way you can know exactly when the /dev entry
> > > is created.
> > 
> > Where is this documented?
> 
> In the udev documentation and a simple google search brings it up.
>
> > Even if the /etc/dev.d/ interface works, that doesn't really make it
> > acceptable that the /etc/hotplug.d/ interface is broken.  There is some
> > locking that ought to be happening and isn't.
> 
> The interface is not broken, you are trying to trigger off of two
> different hotplug events (one when the device appears, and a different
> one when the device node is to be created.)

If it's not broken, then it's not documented either.

Or, at least, I don't see any documentation that tells me about a
second hotplug event when /dev/ttyUSB0 is created.  Now, if I could
write a script that would fire on only only /dev/ttyUSB* creation events and
allow me to filter on the vendor/product ID, that would be fine -- those
are what I'm really interested in.

> Also, please don't restrict this to private email, all further responses
> should be on the linux-hotplug-devel mailing list.

Done.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>


-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_ide95&alloc_id\x14396&op=click
_______________________________________________
Linux-hotplug-devel mailing list  http://linux-hotplug.sourceforge.net
Linux-hotplug-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel