C:\Users\Patryk>ls --version
ls (fileutils) 4.4.231 2011/07
Written by Richard Stallman and David MacKenzie
Microsoft Windows extensions by Alan Klietz.

Copyright (C) 2001 Free Software Foundation, Inc.

Microsoft Windows extensions copyright (C) 2010, Algin Technology LLC
Distributed under GNU General Public License version 2.

This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.