Re: [Libusb-devel] udev craze: need /dev/bus/usb rationale

[Greg KH <greg@kroah.com>]

On Mon, Feb 06, 2006 at 03:29:41PM -0800, Johannes Erdfelt wrote:
> On Fri, Jan 27, 2006, Linus Walleij <triad@df.lth.se> wrote:
> > On Fri, 27 Jan 2006, Johannes Erdfelt wrote:
> > >In libusb 1.0, we open /proc/bus/usb/devices and poll on the fd to get
> > >informed when the bus state changes (device plugged in or disconnected).
> > >
> > >Is there a replacement in sysfs?
> > 
> > Intuitively I would say that linux.c should be rewritten to make use of 
> > inotify where available, i.e. register a callback for events in 
> > /dev/bus/usb (/proc/bus/usb) and act on these callbacks instead of 
> > polling.
> > 
> > Does any of the kernel guys know if this is a good way to go?
> > 
> > Perhaps there is an even smarter way.
> 
> I'm working on implementing inotify support into libusb 1.0 right now.

Does usbfs support inotify events?  For some reason I didn't think it
did, but I'm probably wrong...

thanks,

greg k-h


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