From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kay Sievers Date: Fri, 19 Aug 2005 16:35:37 +0000 Subject: Re: general hotplug/udev questions Message-Id: <20050819163537.GA21638@vrfy.org> List-Id: References: <1124394814.4483.46.camel@rich> In-Reply-To: <1124394814.4483.46.camel@rich> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org On Fri, Aug 19, 2005 at 10:33:02PM +0600, Alexander E. Patrakov wrote: > Greg KH wrote: > > >On Fri, Aug 19, 2005 at 03:09:59PM +0600, Alexander E. Patrakov wrote: > > > > > >>Do I understand correctly that the "crawl through sysfs" approach means > >>bus-specific conversion between sysfs contents (e.g the fact that > >>/sys/bus/usb/devices/1-1/idProduct contains "4002" here) and environment > >>variables (in this case, PRODUCT=...)? > >> > >> > > > >Yes, but it's a world easier now that we have added the 'modalias' sysfs > >files so we don't have to reconstruct anything. All we care about at > >coldplug time is loading the modules and creating existing device nodes. > > > > > Sorry, no. We should also care about providing some hook for packages > like SANE and gPhoto2 to chown/chmod pseudofiles in /proc/bus/usb. This > requires perfect reconstruction of at least $PRODUCT and $DEVICE. usbfs can go to nowhere. :) We will get real nodes for libusb access managed by udev with kernel 2.6.14: kay@pim:~> tree /sys/class/usb_device/ /sys/class/usb_device/ |-- usbdev1.1 | |-- dev | `-- device -> ../../../devices/pci0000:00/0000:00:1d.0/usb1 |-- usbdev1.2 | |-- dev | `-- device -> ../../../devices/pci0000:00/0000:00:1d.0/usb1/1-1 |-- usbdev2.1 | |-- dev | `-- device -> ../../../devices/pci0000:00/0000:00:1d.1/usb2 |-- usbdev2.2 | |-- dev | `-- device -> ../../../devices/pci0000:00/0000:00:1d.1/usb2/2-2 | -- usbdev3.1 | |-- dev | `-- device -> ../../../devices/pci0000:00/0000:00:1d.2/usb3 |-- usbdev4.1 | |-- dev | `-- device -> ../../../devices/pci0000:00/0000:00:1d.7/usb4 `-- usbdev4.5 |-- dev `-- device -> ../../../devices/pci0000:00/0000:00:1d.7/usb4/4-3 Kay ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ 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