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[CreaPhase.git] / octave_packages / m / miscellaneous / ls_command.m

diff --git a/octave_packages/m/miscellaneous/ls_command.m b/octave_packages/m/miscellaneous/ls_command.m
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+## Copyright (C) 2006-2012 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 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} {@var{val} =} ls_command ()
+## @deftypefnx {Function File} {@var{old_val} =} ls_command (@var{new_val})
+## Query or set the shell command used by Octave's @code{ls} command.
+## @seealso{ls}
+## @end deftypefn
+
+## Author: jwe
+
+function old_cmd = ls_command (cmd)
+
+  global __ls_command__;
+
+  if (isempty (__ls_command__))
+    ## MinGW uses different ls_command
+    if (ispc () && ! isunix ()
+        && isempty (file_in_path (getenv ("PATH"), "ls")))
+      __ls_command__ = "dir /D";
+    else
+      __ls_command__ = "ls -C";
+    endif
+  endif
+
+  if (nargin == 0 || nargin == 1)
+
+    old_cmd = __ls_command__;
+
+    if (nargin == 1)
+      if (ischar (cmd))
+        __ls_command__ = cmd;
+      else
+        error ("ls_command: expecting argument to be a character string");
+      endif
+    endif
+
+  endif
+
+endfunction
+
+
+%!test
+%! cmd = ls_command ();
+%! assert (ischar (cmd));
+%! if (ispc () && ! isunix ())
+%!   assert (cmd(1:3), "dir"); 
+%! else
+%!   assert (cmd(1:2), "ls"); 
+%! endif
+