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 , 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 - 2014 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 , 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. */