The commands and utilities under the "test" directory are licensed under the 
GNU General Public License (GPL) Version 2, June 1991. The full text of the 
GPL is located at:

sysfsutils/cmd/GPL

The sysfs library is licensed under the GNU Lesser Public License (LGPL)
Version 2.1, February 1999. The full text of the LGPL is located at:

sysfsutils/lib/LGPL