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[apt.git] / COPYING

Apt is copyright 1997, 1998, 1999 Jason Gunthorpe and others.

Apt is licened under the terms of the GNU General Public License (GPL),
version 2.0 or later, as published by the Free Software Foundation.  See
the file COPYING.GPL [included], /usr/share/common-licenses/GPL, or
<http://www.gnu.org/copyleft/gpl.txt> for the terms of the latest version
of the GNU General Public License.

In addition, prior to November 15th, 2000, apt may be distributed under
terms identical to the above with the following addition:

Works using apt may link against the GUI library "libqt", copyright by
Troll Tech AS, Norway, provided that:

1. The version of "libqt" is licensed under the terms of the "Qt Free Edition
   License" published by Troll Tech AS.  The license terms identified as
   the Qt Free Edition License below are the only such terms under which
   distribution of works derived from both apt and "libqt" are permitted;

and

2. The source code of the version of "libqt" used is

   a) Distributed with the binary version;

   or

   b) Downloadable by anyone, without fee, using a publicly-announced
      URL on the Internet, for a duration of at least three years
      starting with distribution of the binary version.

On and after November 15th, 2000, the above additional terms lose all
force, and apt will be licensed only under the terms of the GNU General
Public License, version 2.0 or later.

      _______________________________________________________________

The following text, up to the text of the Qt Free Edition License, is
informational and not part of the license terms on apt.

Modifications to apt in either source or compiled form must be licensed
under the terms of the GNU General Public License, version 2.0 (or later),
but need not include the above clause permitting usage of the "libqt"
library under the Qt Free Edition License.  Note that removal of this
clause will result in software which is not licensed for binary
redistribution linked against software governed by the Qt Free Edition
License.  In the event that a version of "libqt" is released that is
licensed under terms that do not conflict with the GPL, the additional
clause above is not required to grant permission for distribution of works
that are derived from both apt and "libqt".

No part of apt is licensed under the Qt Free Edition License.  The terms
below are provided to help identify the circumstances under which the
"libqt" library may be used with apt (or a work derived from both).  The
terms below are copied from the LICENSE file of the qt-1.44 distribution,
as of November 10th, 1999.

      _______________________________________________________________

                        QT FREE EDITION LICENSE

Copyright (C) 1992-1999 Troll Tech AS. All rights reserved. 

This is the license for Qt Free Edition version 1.44; it covers private use,
use of third-party application programs based on Qt, and development of
free software for the free software community. 


                      COPYRIGHT AND RESTRICTIONS

The Qt toolkit is a product of Troll Tech AS. The Qt Free Edition is limited
to use with the X Window System. 

You may copy this version of the Qt Free Edition provided that the entire
archive is distributed unchanged and as a whole, including this notice. 

You may use this version of the Qt Free Edition to compile, link and run
application programs legally developed by third parties. 

You may use the Qt Free Edition to create application programs
provided that: 

      You accept this license. 
      Your software does not require modifications to Qt Free Edition.
      You satisfy ONE of the following three requirements 
      EITHER 
            Users of your software can freely obtain source code for the
            software, freely modify the source code (possibly with
            restrictions on copyright notices, attributions and legal
            responsibility), and freely redistribute original or modified
            versions of the software. 
      OR 
            Your software is distributed under the GNU GENERAL
            PUBLIC LICENSE, version 2 or later, as defined by the
            Free Software Foundation. 
      OR 
            Your software is distributed under the GNU LIBRARY
            GENERAL PUBLIC LICENSE, version 2 or later, as
            defined by the Free Software Foundation. 

If you are paid to develop something with Qt Free Edition or it is a part of
your job the following conditions also apply: 

      Your software must not require libraries, programs, data or
      documentation that are not available outside your organization in
      order to compile or use. 
      If and when your organization starts using the software, you must
      notify Troll Tech AS of the following: 
            Your organization's name and purpose. 
            The software's name and purpose. 
            The software's license. 
            That your organization considers the software to be free
            software. 

You may also use the Qt Free Edition to create reusable components
(such as libraries) provided that you accept the terms above, and in
addition that: 

      Your components' license includes the following text: 

            [Your package] requires the Qt library, which is
            copyright Troll Tech AS. Freely distributable
            programs may generally use Qt Free Edition free of
            charge, see [README.QT] for details. 

      README.QT is distributed along with your components. 
      Qt Free Edition is not distributed as an integral part of your
      components. 

                       LIMITATIONS OF LIABILITY

Troll Tech AS makes no obligation under this license to support or
upgrade Qt Free Edition, or assist in the use of Qt Free Edition. 

In no event shall Troll Tech AS be liable for any lost revenue or profits or
other direct, indirect, special, incidental or consequential damages, even
if Troll Tech has been advised of the possibility of such damages. 

QT FREE EDITION IS PROVIDED AS IS WITH NO WARRANTY OF ANY KIND,
INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
      _______________________________________________________________