update packages

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

diff --git a/octave_packages/m/miscellaneous/ls.m b/octave_packages/m/miscellaneous/ls.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 {Command} {} ls options
+## List directory contents.  For example:
+##
+## @example
+## @group
+## ls -l
+##      @print{} total 12
+##      @print{} -rw-r--r--   1 jwe  users  4488 Aug 19 04:02 foo.m
+##      @print{} -rw-r--r--   1 jwe  users  1315 Aug 17 23:14 bar.m
+## @end group
+## @end example
+##
+## The @code{dir} and @code{ls} commands are implemented by calling your
+## system's directory listing command, so the available options may vary
+## from system to system.
+## @seealso{dir, stat, readdir, glob, filesep, ls_command}
+## @end deftypefn
+
+## Author: jwe
+
+function retval = ls (varargin)
+
+  global __ls_command__;
+
+  if (isempty (__ls_command__) || ! ischar (__ls_command__))
+    ## Initialize value for __ls_command__.
+    ls_command ();
+  endif
+
+  if (! iscellstr (varargin))
+    error ("ls: all arguments must be character strings");
+  endif
+
+  if (nargin > 0)
+    args = tilde_expand (varargin);
+    if (ispc () && ! isunix ())
+      ## shell (cmd.exe) on MinGW uses '^' as escape character
+      args = regexprep (args, '([^\w.*? -])', '^$1');
+    else
+      args = regexprep (args, '([^\w.*? -])', '\$1');
+    endif
+    args = sprintf ("%s ", args{:});
+  else
+    args = "";
+  endif
+
+  cmd = sprintf ("%s %s", __ls_command__, args);
+
+  if (page_screen_output () || nargout > 0)
+    [status, output] = system (cmd);
+
+    if (status != 0)
+      error ("ls: command exited abnormally with status %d\n", status);
+    elseif (nargout == 0)
+      puts (output);
+    else
+      retval = strvcat (regexp (output, '\S+', 'match'){:});
+    endif
+  else
+    ## Just let the output flow if the pager is off.  That way the
+    ## output from things like "ls -R /" will show up immediately and
+    ## we won't have to buffer all the output.
+    system (cmd);
+  endif
+
+endfunction
+
+
+%!test
+%! list = ls ();
+%! assert (ischar (list));
+%! assert (! isempty (list));
+
+%!error ls (1);
+