This file is indexed.

/usr/share/doc/xpuzzles/copyright is in xpuzzles 7.7.1-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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Downloaded from <ftp://ftp.tux.org/pub/tux/bagleyd/xpuzzles/>

Initially packaged by Christoph Lameter <clameter@waterf.org>
on Thu, 08 Sep 1996 15:37:25 +0100 and maintained by
Christoph Lameter           <clameter@waterf.org> (until 11 Nov 1996)
Vincent Renardias           <vincent@waw.com>     (until 29 Sep 1998)
Darren Benham               <gecko@debian.org>    (until 12 Mar 2000)
Matej Vela                  <vela@debian.org>     (until 29 Dec 2001)
with additional help from
Christian Kurz              <shorty@debian.org>
Henrique de Moraes Holschuh <hmh@debian.org>
Joey Hess                   <joeyh@debian.org>
Thomas Bushnell, BSG        <tb@debian.org>
Florian Ernst                <florian@debian.org> (until 23 Dec 2005)
Jose Carlos Medeiros         <debian@psabs.com.br> (until 17 Aug 2006)

The current maintainer is Varun Hiremath <varunhiremath@gmail.com>

The source code includes the following copyright licence:

----------------------------------------------------------
/*-
#
#  Copyright © 1994 - 2005	David Albert Bagley, bagleyd@tux.org
#
#                   All Rights Reserved
#
#  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 the author not be
#  used in advertising or publicity pertaining to distribution of the
#  software without specific, written prior permission.
#
#  This program is distributed in the hope that it will be "playable",
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
*/
----------------------------------------------------------

For xcubes/CubesS.c there exists the following note:

----------------------------------------------------------
#  Taken from the X puzzle by Don Bennett, HP Labs
#
[...]
/*
 *      $XConsortium: puzzle.c,v 1.14 94/03/28 18:34:10 gildea Exp $
 */

/* Puzzle - © Copyright 1987, 1988 Don Bennett.
 *
 * 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.
 */
----------------------------------------------------------


The files */{file.c,picture.c,sound.c} show:

----------------------------------------------------------
/*
#  Taken from xlock, many authors...
#
#                   All Rights Reserved
#
#  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 the author not be
#  used in advertising or publicity pertaining to distribution of the
#  software without specific, written prior permission.
#
#  This program 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.
#
*/
----------------------------------------------------------

The */mkinstalldirs scripts show:

----------------------------------------------------------
# Author: Noah Friedman <friedman@prep.ai.mit.edu>
# Created: 1993-05-16
# Public domain
----------------------------------------------------------

The */install-sh scripts show:

----------------------------------------------------------
# Copyright 1991 by the Massachusetts Institute of Technology
#
# Permission to use, copy, modify, distribute, and sell this software and its
# documentation for any purpose is hereby granted without fee, 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.  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.
----------------------------------------------------------