Copyright for openafs source package in Noble

This package was debianized by Sam Hartman  on
Fri,  3 Nov 2000 23:41:41 -0500.

It was downloaded via Git from:

    git://git.openafs.org/openafs.git

Upstream Maintainers:

    openafs-gatekeepers@openafs.org

The upstream source is generated from a Git tag for the corresponding
upstream release, but with the WINNT directory removed to reduces the size
of the upstream tarball by about 8MB.

The source package contains the OpenAFS documentation as distributed by
the OpenAFS project, some of which does not include the original source.
These documents were originally created using TeX internally by Transarc,
the original authors of AFS.  By the time that AFS was released as free
software by IBM after acquiring Transarc, the original source could no
longer be found.  It has apparently been lost over the years.

Although these HTML and PDF files would not normally be considered source,
they're all that's available until they can be rewritten and updated in
some better format.  They have been released under the IBM Public License
Version 1.0 (included below), the same license as the rest of OpenAFS.

Normally, this documentation could not be included in Debian without being
accompanied by the original TeX source and build tools under DFSG#2, but
under the circumstances, these files essentially are the source, as
they're all that anyone has.

These documents are being replaced by revised versions in DocBook and
Doxygen, with suitable source, and once that process is complete, the old
sourceless HTML and PDF documents will be removed.  The documentation
installed in the openafs-doc package already includes only material built
from the new maintainable source.

Copyright:

   Copyright 2000, International Business Machines Corporation and others.
   All Rights Reserved.

   IBM Public License Version 1.0
   
   THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS IBM
   PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF
   THE PROGRAM CONSTITUTES RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
   
   1. DEFINITIONS
   
   "Contribution" means:
   a) in the case of International Business Machines Corporation ("IBM"),
       the Original Program, and
       
   b) in the case of each Contributor,
       
   i) changes to the Program, and
       
   ii) additions to the Program;
       
   where such changes and/or additions to the Program originate from and
       are distributed by that particular Contributor. A Contribution
       'originates' from a Contributor if it was added to the Program by
       such Contributor itself or anyone acting on such Contributor's
       behalf. Contributions do not include additions to the Program
       which: (i) are separate modules of software distributed in
       conjunction with the Program under their own license agreement,
       and (ii) are not derivative works of the Program.
       
   "Contributor" means IBM and any other entity that distributes the
   Program.
   
   "Licensed Patents " mean patent claims licensable by a Contributor
   which are necessarily infringed by the use or sale of its Contribution
   alone or when combined with the Program.
   
   "Original Program" means the original version of the software
   accompanying this Agreement as released by IBM, including source code,
   object code and documentation, if any.
   
   "Program" means the Original Program and Contributions.
   
   "Recipient" means anyone who receives the Program under this
   Agreement, including all Contributors.
   
   2. GRANT OF RIGHTS
   a) Subject to the terms of this Agreement, each Contributor hereby
       grants Recipient a non-exclusive, worldwide, royalty-free
       copyright license to reproduce, prepare derivative works of,
       publicly display, publicly perform, distribute and sublicense the
       Contribution of such Contributor, if any, and such derivative
       works, in source code and object code form.
       
   b) Subject to the terms of this Agreement, each Contributor hereby
       grants Recipient a non-exclusive, worldwide, royalty-free patent
       license under Licensed Patents to make, use, sell, offer to sell,
       import and otherwise transfer the Contribution of such
       Contributor, if any, in source code and object code form. This
       patent license shall apply to the combination of the Contribution
       and the Program if, at the time the Contribution is added by the
       Contributor, such addition of the Contribution causes such
       combination to be covered by the Licensed Patents. The patent
       license shall not apply to any other combinations which include
       the Contribution. No hardware per se is licensed hereunder.
       
   c) Recipient understands that although each Contributor grants the
       licenses to its Contributions set forth herein, no assurances are
       provided by any Contributor that the Program does not infringe the
       patent or other intellectual property rights of any other entity.
       Each Contributor disclaims any liability to Recipient for claims
       brought by any other entity based on infringement of intellectual
       property rights or otherwise. As a condition to exercising the
       rights and licenses granted hereunder, each Recipient hereby
       assumes sole responsibility to secure any other intellectual
       property rights needed, if any. For example, if a third party
       patent license is required to allow Recipient to distribute the
       Program, it is Recipient's responsibility to acquire that license
       before distributing the Program.
       
   d) Each Contributor represents that to its knowledge it has sufficient
       copyright rights in its Contribution, if any, to grant the
       copyright license set forth in this Agreement.
       
   3. REQUIREMENTS
   
   A Contributor may choose to distribute the Program in object code form
   under its own license agreement, provided that:
   a) it complies with the terms and conditions of this Agreement; and
       
   b) its license agreement:
       
   i) effectively disclaims on behalf of all Contributors all warranties
       and conditions, express and implied, including warranties or
       conditions of title and non-infringement, and implied warranties
       or conditions of merchantability and fitness for a particular
       purpose;
       
   ii) effectively excludes on behalf of all Contributors all liability
       for damages, including direct, indirect, special, incidental and
       consequential damages, such as lost profits;
       
   iii) states that any provisions which differ from this Agreement are
       offered by that Contributor alone and not by any other party; and
       
   iv) states that source code for the Program is available from such
       Contributor, and informs licensees how to obtain it in a
       reasonable manner on or through a medium customarily used for
       software exchange.
       
   When the Program is made available in source code form:
   a) it must be made available under this Agreement; and
       
   b) a copy of this Agreement must be included with each copy of the
       Program.
       
   Each Contributor must include the following in a conspicuous location
   in the Program:
   
   Copyright © {date here}, International Business Machines Corporation
       and others. All Rights Reserved.
       
   In addition, each Contributor must identify itself as the originator
   of its Contribution, if any, in a manner that reasonably allows
   subsequent Recipients to identify the originator of the Contribution.
   
   4. COMMERCIAL DISTRIBUTION
   
   Commercial distributors of software may accept certain
   responsibilities with respect to end users, business partners and the
   like. While this license is intended to facilitate the commercial use
   of the Program, the Contributor who includes the Program in a
   commercial product offering should do so in a manner which does not
   create potential liability for other Contributors. Therefore, if a
   Contributor includes the Program in a commercial product offering,
   such Contributor ("Commercial Contributor") hereby agrees to defend
   and indemnify every other Contributor ("Indemnified Contributor")
   against any losses, damages and costs (collectively "Losses") arising
   from claims, lawsuits and other legal actions brought by a third party
   against the Indemnified Contributor to the extent caused by the acts
   or omissions of such Commercial Contributor in connection with its
   distribution of the Program in a commercial product offering. The
   obligations in this section do not apply to any claims or Losses
   relating to any actual or alleged intellectual property infringement.
   In order to qualify, an Indemnified Contributor must: a) promptly
   notify the Commercial Contributor in writing of such claim, and b)
   allow the Commercial Contributor to control, and cooperate with the
   Commercial Contributor in, the defense and any related settlement
   negotiations. The Indemnified Contributor may participate in any such
   claim at its own expense.
   
   For example, a Contributor might include the Program in a commercial
   product offering, Product X. That Contributor is then a Commercial
   Contributor. If that Commercial Contributor then makes performance
   claims, or offers warranties related to Product X, those performance
   claims and warranties are such Commercial Contributor's responsibility
   alone. Under this section, the Commercial Contributor would have to
   defend claims against the other Contributors related to those
   performance claims and warranties, and if a court requires any other
   Contributor to pay any damages as a result, the Commercial Contributor
   must pay those damages.
   
   5. NO WARRANTY
   
   EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE PROGRAM IS
   PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT LIMITATION, ANY
   WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, MERCHANTABILITY
   OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is solely
   responsible for determining the appropriateness of using and
   distributing the Program and assumes all risks associated with its
   exercise of rights under this Agreement, including but not limited to
   the risks and costs of program errors, compliance with applicable
   laws, damage to or loss of data, programs or equipment, and
   unavailability or interruption of operations.
   
   6. DISCLAIMER OF LIABILITY
   
   EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NEITHER RECIPIENT NOR
   ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT,
   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING
   WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OR
   DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
   HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
   
   7. GENERAL
   
   If any provision of this Agreement is invalid or unenforceable under
   applicable law, it shall not affect the validity or enforceability of
   the remainder of the terms of this Agreement, and without further
   action by the parties hereto, such provision shall be reformed to the
   minimum extent necessary to make such provision valid and enforceable.
   
   If Recipient institutes patent litigation against a Contributor with
   respect to a patent applicable to software (including a cross-claim or
   counterclaim in a lawsuit), then any patent licenses granted by that
   Contributor to such Recipient under this Agreement shall terminate as
   of the date such litigation is filed. In addition, If Recipient
   institutes patent litigation against any entity (including a
   cross-claim or counterclaim in a lawsuit) alleging that the Program
   itself (excluding combinations of the Program with other software or
   hardware) infringes such Recipient's patent(s), then such Recipient's
   rights granted under Section 2(b) shall terminate as of the date such
   litigation is filed.
   
   All Recipient's rights under this Agreement shall terminate if it
   fails to comply with any of the material terms or conditions of this
   Agreement and does not cure such failure in a reasonable period of
   time after becoming aware of such noncompliance. If all Recipient's
   rights under this Agreement terminate, Recipient agrees to cease use
   and distribution of the Program as soon as reasonably practicable.
   However, Recipient's obligations under this Agreement and any licenses
   granted by Recipient relating to the Program shall continue and
   survive.
   
   IBM may publish new versions (including revisions) of this Agreement
   from time to time. Each new version of the Agreement will be given a
   distinguishing version number. The Program (including Contributions)
   may always be distributed subject to the version of the Agreement
   under which it was received. In addition, after a new version of the
   Agreement is published, Contributor may elect to distribute the
   Program (including its Contributions) under the new version. No one
   other than IBM has the right to modify this Agreement. Except as
   expressly stated in Sections 2(a) and 2(b) above, Recipient receives
   no rights or licenses to the intellectual property of any Contributor
   under this Agreement, whether expressly, by implication, estoppel or
   otherwise. All rights in the Program not expressly granted under this
   Agreement are reserved.
   
   This Agreement is governed by the laws of the State of New York and
   the intellectual property laws of the United States of America. No
   party to this Agreement will bring a legal action under this Agreement
   more than one year after the cause of action arose. Each party waives
   its rights to a jury trial in any resulting litigation.

Kerberos 5 ticket support in rxkad is subject to the following copyright:
/*
 * Copyright (c) 1995, 1996, 1997, 2002 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

Some code in rxkad/ticket5.c is subject to the following copyright:
/*
 * Copyright 1992, 2002 by the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 * 
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 */

Some portions of Rx are subject to the following license:
/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user or with the express written consent of
 * Sun Microsystems, Inc.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

ka-forwarder was taken from the AFS/Kerberos 5 Migration Kit, to which it
was donated by Jeffrey T. Hutzelman.  It is covered under the following
license:
/*
 * Copyright (c) 1993 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software_Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */

src/afs/LINUX/osi_flush.s included code under IBM Public License with
permission of the author, Paul MacKerras.

Personal contributions made by Jason Edgecombe
 that refer to the "BSD license" are subject
to the following license:

   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are
   met:

       * Redistributions of source code must retain the above
         copyright notice, this list of conditions and the following
         disclaimer.
       
       * Redistributions in binary form must reproduce the above
         copyright notice, this list of conditions and the following
         disclaimer in the documentation and/or other materials
         provided with the distribution.

       * Neither the name of OpenAFS nor the names of its
         contributors may be used to endorse or promote products
         derived from this software without specific prior written
         permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

doc/protocol/rfc5864.txt is dual-licensed under the following two licenses:
   Copyright 2009, 2010 Russ Allbery 
   Copyright 2010 IETF Trust

   Permission to use, copy, modify, and distribute this document for any
   purpose and without fee is hereby granted, provided that the above
   copyright notice appear in all copies and that both that copyright
   notice and this permission notice appear in supporting documentation,
   and that the name of its authors not be used in advertising or
   publicity pertaining to distribution of this document without specific,
   written prior permission.  Its authors make no representations about
   the suitability of this document for any purpose.  It is provided "as
   is" without express or implied warranty.

   THIS DOCUMENT IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
   WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
and
   Copyright (c) 2010 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Some portions contributed by Benjamin Kaduk have the following license:
  Copyright (C) 2015 by Benjamin Kaduk
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  * Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.

  * Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in
    the documentation and/or other materials provided with the
    distribution.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  OF THE POSSIBILITY OF SUCH DAMAGE.

tests/common/misc.c is subject to the following license:
  Copyright (c) 2019 Sine Nomine Associates. All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.

  THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

====================================================

The files under src/external/autoconf-archive/m4/ are covered by the following
license:

  Copyright (c) 2008 Guido U. Draheim 
  Copyright (c) 2011 Maarten Bosmans 
  Copyright (c) 2013 Gabriele Svelto 
  Copyright (c) 2014 Mike Frysinger 

  Copying and distribution of this file, with or without modification, are
  permitted in any medium without royalty provided the copyright notice
  and this notice are preserved.  This file is offered as-is, without any
  warranty.