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libusb for Debian ----------------- libusb uses a pseudo-filesystem known as 'usbdevfs` or 'usbfs` to access the USB devices connected to your machine. This filesystem must be mounted under /proc/bus/usb for libusb to work. It could be done using the following command: mount -t usbfs none /proc/bus/usb An alternative and more permanent method would be to add none /proc/bus/usb usbfs defaults 0 0 to your /etc/fstab file. It will mount the usbfs for you automatically at boot time ; only root will be able to access the USB devices with this setup. You can then issue `cat /proc/bus/usb/devices` to extract USB device information, and user mode drivers can use usbfs to interact with USB devices. Several mount options are available, that allow you to set the permissions on the files created under /proc/bus/usb so that non-root users can use libusb applications: - devuid=xxx, devgid=xxx, devmode=xxx respectively set the uid, the gid and the mode of the devices files, ie /proc/bus/usb/BBB/DDD - busuid=xxx, busgid=xxx, devmode=xxx respectively set the uid, the gid and the mode of the bus files, ie /proc/bus/usb/BBB - listuid=xxx, listgid=xxx, listmode=xxx respectively set the uid, the gid and the mode of /proc/bus/usb/devices -- Aurelien Jarno <aurel32@debian.org>, Sun, 21 Mar 2004 01:01:44 +0100