%## Copyright (C) 2004, 2006, 2007 Alois Schloegl 
%##
%## 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 3 of the License, 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, see
%## <http://www.gnu.org/licenses/>.

%## -*- texinfo -*-
%## @deftypefn {Function File} {} isdir (@var{f})
%## Return true if @var{f} is a directory.
%## @end deftypefn

function t = isdir (x)
  if (nargin == 1)
    ## Exist returns an integer but isdir should return a logical.
    t = exist (x, "dir") == 7;
  else
    print_usage ("isdir");
  endif
endfunction