/*** Copyright 2010 Lennart Poettering** This is free software; you can redistribute it and/or modify it* under the terms of the GNU Lesser General Public License as published by* the Free Software Foundation; either version 2.1 of the License, or* (at your option) any later version.*** Copyright (C) 2015 Karel Zak <kzak@redhat.com>* Modified the original version from systemd project for util-linux.*/