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What:		/sys/class/
Date:		February 2006
Contact:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Description:
		The /sys/class directory will consist of a group of
		subdirectories describing individual classes of devices
		in the kernel.  The individual directories will consist
		of either subdirectories, or symlinks to other
		directories.

		All programs that use this directory tree must be able
		to handle both subdirectories or symlinks in order to
		work properly.

Users:
	udev <linux-hotplug-devel@lists.sourceforge.net>
於是可以不回頭的逆風飛翔 不怕心頭有雨 眼底有霜