Ruby posix_mq is copyrighted Free Software by all contributors, see logs in revision control for names and email addresses of all of them.
You can redistribute it and/or modify it either under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, version 3.0 LGPLv3 (see COPYING) or version 2 of the GNU General Public License GPLv2 (see COPYING-GPL2).
The project leader Eric Wong reserves the right to upgrade the project license to future versions of the LGPL (but no other licenses).
Ruby posix_mq is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with Ruby posix_mq; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301