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+## Copyright (C) 2006 Bill Denney
+## 
+## This file is part of Octave.
+##
+## Octave 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, or (at your option)
+## any later version.
+##
+## Octave 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 Octave; see the file COPYING.  If not, write to the Free
+## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+## 02110-1301, USA.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} bunzip2 (@var{bzfile}, @var{dir})
+## Unpack the bzip2 archive @var{bzfile} to the directory @var{dir}. If
+## @var{dir} is not specified, it defaults to the current directory.
+## @seealso{unpack, bzip2, tar, untar, gzip, gunzip, zip, unzip}
+## @end deftypefn
+
+## Author: Bill Denney <denney@seas.upenn.edu>
+
+function varargout = bunzip2 (files, outputdir)
+
+  if (! (nargin == 1 || nargin == 2))
+    print_usage ();
+  endif
+
+  if (nargin == 1)
+    outputdir = ".";
+  endif
+  varargout = cell (1, nargout);
+  [varargout{:}] = unpack (files, outputdir, mfilename ());
+
+endfunction