This is a Debian prepackaged version of tree, the directory tree lister.

It was downloaded from http://mama.indstate.edu/users/ice/tree/

The current maintainer of this package is Florian Ernst <florian@debian.org>,
the previous maintainers were
Joey Hess      (until 17 Feb 1997)
Scott K. Ellis (until 14 Jul 2004)


The following copyright applies to this package:

Main author: Steve Baker (ice@mama.indstate.edu)

Copyright (c) 1996 - 2022 by
Steve Baker, Thomas Moore, Francesc Rocher, Florian Sesser, Kyosuke Tokoro

 This program 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 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.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License with
 the Debian GNU/Linux distribution in file /usr/share/common-licenses/GPL;
 if not, write to the Free Software Foundation, Inc., 51 Franklin St,
 Fifth Floor, Boston, MA 02110-1301, USA.

On Debian systems, the complete text of the GNU General Public
License, version 2, can be found in /usr/share/common-licenses/GPL-2.


For strverscmp.c the following applies:
/* Compare strings while treating digits characters numerically.
   Copyright (C) 1997, 2002, 2005 Free Software Foundation, Inc.
   This file is part of the libiberty library.
   Contributed by Jean-François Bignolles <bignolle@ecoledoc.ibp.fr>, 1997.

   Libiberty 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.

   Libiberty 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 the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301 USA.  */