On Fri, Aug 03, 2007 at 09:29:16AM -0700, David Brownell wrote: > On Friday 03 August 2007, Matthew Garrett wrote: > > > Speaking of which, what's this /dev/bus/usb/* crap on Ubuntu? > > > I had to undo all that on my Feisty system before any normal > > > /proc/bus/usb stuff would work again. > > > > "Usbfs files can't handle Access Control Lists (ACL), which are the > > default way to grant access to USB devices for untrusted users of a > > desktop system. The usbfs functionality is replaced by real device-nodes > > managed by udev. These nodes live in /dev/bus/usb and are used by > > libusb." > > > > (From Kconfig) > > That's shortly after the explanation that the relevant Kconfig > option is for ** /proc/bus/usb ** files ... note that despite the > strangeness in that text (usbfs still hasn't been "replaced", so > that should say "will eventually be replaced" not "is replaced"), > it's clear that /proc/bus/usb/ and /dev/bus/usb/ are two different > things. And thus: that Ubuntu's /dev/bus/usb/ setup is flakey.
Hm, if you look at SuSE and Fedora, they too are putting usbfs in /dev/bus/usb/ now, not mounting the filesystem, but using the device nodes for access due to ACLs for local users. libusb works just fine with this, and I think that all other programs that directly access the old /proc/bus/usb mount are fixed up, with the exception of usbview (but I do have patches floating around for that to solve it.) thanks, greg k-h - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
