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I want to make udevinfo the standard query interface, so all the user features of the main udev are copied in here. It is now capable to: o query the database for a given value o dump the whole database o extract all possible device attributes for a sysfs_device In addition to the known options of udev it supports the query for the mode of the device node, and it includes the mode in the database dump: udevinfo -d P: /class/video4linux/video0 N: video/webcam0 M: 0666 S: camera0 kamera0 O: 500 G: 500 It is also a bit more friendly with the pathnames specified for devices or nodes. We remove the absolute path or add it if neccessary: udevinfo -q mode -n video/webcam0 udevinfo -q mode -n /udev/video/webcam0 0666 udevinfo -q mode -p /sys/class/video4linux/video0 udevinfo -q mode -p /class/video4linux/video0 udevinfo -q mode -p class/video4linux/video0 0666