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+++ b/scripts/path/genpath.m
@@ -0,0 +1,60 @@
+## Copyright (C) 2006 John W. Eaton
+##
+## 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 {Built-in Function} {} genpath (@var{dir})
+## Return a path constructed from @var{dir} and all its subdiretories.
+## @end deftypefn
+
+function retval = genpath (dirname)
+
+  if (nargin == 1)
+    s = stat (dirname);
+    if (S_ISDIR (s.mode))
+      lst = __genpath__ (dirname);
+      lst{2,:} = pathsep ();
+      lst{2,end} = "";
+      retval = strcat (lst{:});
+    else
+      retval = "";
+    endif
+  else
+    print_usage ("genpath");
+  endif
+
+endfunction
+
+function retval = __genpath__ (dirname)
+  
+  retval = {dirname};
+
+  s = dir (dirname);
+  n = length (s);
+  for i = 1:n
+    elt = s(i);
+    nm = elt.name;
+    if (elt.isdir && ! (strcmp (nm, ".") || strcmp (nm, "..")))
+      ## FIXME -- Octave bug: recursion fails here if the __genpath__
+      ## call is moved inside the [].
+      tmp = __genpath__ (fullfile (dirname, nm));
+      retval = [retval, tmp];
+    endif
+  endfor
+
+endfunction