This is the Debian GNU/Linux prepackaged version of the GNU groff
document formatting system. 
GNU groff was written by James Clark <jjc@jclark.com>.  

This Debian package was previously maintained by Fabrizio Polacco
<fpolacco@debian.org>.
It is now maintained by Colin Watson <cjwatson@debian.org>.

The original tarball came from <URL:ftp://groff.ffii.org/pub/groff/>:
  48fa768dd6fdeb7968041dd5ae8e2b02  groff-1.20.1.tar.gz
and was simply renamed to groff_1.20.1.orig.tar.gz.

Some patches have been applied to groff outside the debian directory.

The Debian diff also appends /usr/share/groff/tmac to the default macro path
for compatibility with versions of groff earlier than 1.17 (patch by Colin
Watson).

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

Copyright (C) 1989-2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
              2008, 2009
Free Software Foundation, Inc.
     Written by James Clark (jjc@jclark.com)

This file is part of groff.

groff is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or
(at your option) any later version.

groff 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 General Public License
for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

On Debian systems, a copy of the GNU General Public License is available
in /usr/share/common-licenses/GPL-3 as part of the base-files package.

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

Included in this release are implementations of troff, pic, eqn, tbl,
grn, refer, -man, -mdoc, and -ms macros, and drivers for PostScript, TeX
dvi format, HP LaserJet 4 printers, Canon CAPSL printers, HTML format
(still alpha), and typewriter-like devices.  Also included is a modified
version of the Berkeley -me macros, an enhanced version of the X11
xditview previewer, and an implementation of the -mm macros contributed
by Joergen Haegg (jh@axis.se).

xditview is copyrighted by MIT under the usual X terms.

/*
 * Copyright 1991 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.
 *
 * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */

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

The groff manual is also distributed under the terms of the GNU Free
Documentation License version 1.3.  On Debian systems, this is available in
/usr/share/common-licenses/GFDL-1.3 as part of the base-files package.
However, Debian does not consider this free when the Front-Cover Texts or
Back-Cover Texts options are used.  groff is distributed with a LICENSES
file containing the following text (excerpted):

  The groff program is a free software project.  It is licensed under the GNU
  General Public License (GNU GPL), version 3 or later.
  
  The file COPYING in the top directory of the groff source package contains a
  copy of the GPL that was downloaded from the GNU web site
  http://www.gnu.org/copyleft/gpl.txt at 3 jan 2009.
  
  All files part of groff are licensed under this version of the GPL (or
  licenses which are compatible with the GPL). You are free to choose
  version 3 or any subsequent version of the GPL.

I e-mailed the upstream maintainer to clarify the intent of this. Here is
the relevant part of the reply:

  From: Werner LEMBERG <wl@gnu.org>
  To: cjwatson@debian.org
  Subject: Re: Clarifying the scope of groff/LICENSE
  Date: Thu, 18 Nov 2004 00:19:52 +0100 (CET)
  
  > Since "compatible with the GPL" means to all intents and purposes
  > "may be distributed under the terms of the GPL", can I correctly
  > assume that groff/LICENSE grants me permission to distribute
  > groff/doc/groff.texinfo and groff/doc/pic.ms under the terms of the
  > GPL?
  
  This is the intention, of course.
  
  > If not, is the FDL thing from yesteryear going to be resolved some
  > other way?  I just want to make sure that I don't get forced to
  > remove the groff manual, since that would really diminish the
  > quality of the Debian package IMHO.
  
  Sigh.  I haven't found time to revert the FDL stuff back to GPL.  It
  basically affects only Bernd Warken and me, and we have both agreed to
  return to GPL in case FDL makes problems.

(Note that this e-mail predates the current wording in LICENSES.)

It is therefore my understanding that the copyright holders of the groff
documentation intend it to be distributable under the terms of the GPL
version 3 or later.  The reference above to the FDL text in
/usr/share/common-licenses/ is for information only.

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

The following material is based on that in the groff LICENSES file, which
itself is licensed as follows:

  Copyright 2003, 2006, 2007, 2009
    Free Software Foundation, Inc.

  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.

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

The grn preprocessor was written by Barry Roitblat <barry@rentonww.com> and
David Slattengren <slatteng@Xinet.COM>. These files have been part of the
original Berkeley ditroff distribution, without AT&T code, and are in the
public domain.

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

The gxditview output device was based on X11's xditview program and thus has
the X licence.

  Copyright 1991 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.

  M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
  BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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

The -mdoc and -me macro sets are distributed under the terms of the BSD
licence.

  Copyright (c) 1991, 1993
 	The Regents of the University of California.  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. [Deleted.  See
      ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change]
  4. Neither the name of the University 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 REGENTS 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 REGENTS 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.

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

The file tmac/hyphen.us is identical to the file hyphen.tex, part of the TeX
system written by Donald E. Knuth; the master file can be found at:

  ftp://labrea.stanford.edu/pub/tex/dist/lib/hyphen.tex

It has been renamed for consistency, i.e., to make patterns available under
the filenames hyphen.<language>, e.g. hyphen.de or hyphen.uk.

  Unlimited copying and redistribution of this file are permitted as long
  as this file is not modified. Modifications are permitted, but only if
  the resulting file is not named hyphen.tex.

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

The file tmac/hyphen.fr contains the same patterns as the file frhyph.tex
(for TeX), which can be found at:

  http://dante.ctan.org/CTAN/language/hyphenation/frhyph.tex

The patterns have been converted to a format groff can understand.

   frhyph.tex % French hyphenation patterns
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   This file is available for free and can used and redistributed
   asis for free. Modified versions should have another name.
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  % \message{frhyph.tex - French hyphenation patterns (V2.11) <2002/01/16>}

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

The file tmac/hyphen.sv is identical to the file svhyph.tex, which can be
found at:

  http://dante.ctan.org/CTAN/language/hyphenation/svhyph.tex

  Copyright 1994 by Jan Michael Rynning. All rights reserved.
  This program may be distributed and/or modified under the conditions of
  the LaTeX Project Public License, either version 1.2 of this license or
  (at your option) any later version.  The latest version of this license
  is in http://www.latex-project.org/lppl.txt and version 1.2 or later is
  part of all distributions of LaTeX version 1999/12/01 or later.

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

The files tmac/hyphen.det and tmac/hyphen.den contain the same patterns as
the files `dehypht-x-2017-03-31.pat' and `dehyphn-x-2017-03-31.pat' (for
TeX), respectively, which can be found at:

  http://ctan.org/tex-archive/language/hyphenation/dehyph-exptl

The patterns have been converted to latin-1.

  Copyright (C) 1988,1991 Rechenzentrum der Ruhr-Universitaet Bochum
                [german hyphen patterns]
  Copyright (C) 1993,1994,1999 Bernd Raichle/DANTE e.V.
                [macros, adaption for TeX 2]
  Copyright (C) 1998--2001 Walter Schmidt
                [adaption to new German orthography]

  -----------------------------------------------------------------
  IMPORTANT NOTICE:

  This program can be redistributed and/or modified under the terms
  of the LaTeX Project Public License Distributed from CTAN
  archives in directory macros/latex/base/lppl.txt; either
  version 1 of the License, or any later version.
  -----------------------------------------------------------------

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

The file tmac/hyphen.cs contains the same patterns as the file czhyphen.tex
(for TeX), which can be found in the archive:

  http://dante.ctan.org/CTAN/macros/cstex/base/csplain.tar.gz

The patterns have been converted to a format groff can understand.

  This is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This file 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program. If not, see <http://www.gnu.org/licenses/>.

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

doc/meintro.me and doc/meref.me are distributed under the following terms:

  Copyright (c) 1986 The Regents of the University of California.
  All rights reserved.

  Redistribution and use in source and binary forms are permitted
  provided that the above copyright notice and this paragraph are
  duplicated in all such forms and that any documentation,
  advertising materials, and other materials related to such
  distribution and use acknowledge that the software was developed
  by the University of California, Berkeley.  The name of the
  University may not be used to endorse or promote products derived
  from this software without specific prior written permission.
  THIS SOFTWARE 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.