Licence GPL
General
Public License (GPL)
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass
Ave, Cambridge, MA 02139, USA. Everyone is permitted to copy and
distribute verbatim copies of this license document, but changing
it is not allowed.
PREAMBLE
The
licenses for most software are designed to take away your freedom
to share and change it. By contrast, the GNU General Public License
is intended to guarantee your freedom to share and change free software--to
make sure the software is free for all its users. This General Public
License applies to most of the Free Software Foundation's software
and to any other program whose authors commit to using it. (Some
other Free Software Foundation software is covered by the GNU Library
General Public License instead.) You can apply it to your programs,
too.
When
we speak of free software, we are referring to freedom, not price.
Our General Public Licenses are designed to make sure that you have
the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get
it if you want it, that you can change the software or use pieces
of it in new free programs; and that you know you can do these things.
To
protect your rights, we need to make restrictions that forbid anyone
to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you
if you distribute copies of the software, or if you modify it.
For
example, if you distribute copies of such a program, whether gratis
or for a fee, you must give the recipients all the rights that you
have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their
rights.
We
protect your rights with two steps: (1) copyright the software,
and (2) offer you this license which gives you legal permission
to copy, distribute and/or modify the software.
Also,
for each author's protection and ours, we want to make certain that
everyone understands that there is no warranty for this free software.
If the software is modified by someone else and passed on, we want
its recipients to know that what they have is not the original,
so that any problems introduced by others will not reflect on the
original authors' reputations.
Finally,
any free program is threatened constantly by software patents. We
wish to avoid the danger that redistributors of a free program will
individually obtain patent licenses, in effect making the program
proprietary. To prevent this, we have made it clear that any patent
must be licensed for everyone's free use or not licensed at all.
The
precise terms and conditions for copying, distribution and modification
follow.
GNU
GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0.
This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright
law: that is to say, a work containing the Program or a portion
of it, either verbatim or with modifications and/or translated into
another language. (Hereinafter, translation is included without
limitation in the term "modification".) Each licensee is addressed
as "you".
Activities
other than copying, distribution and modification are not covered
by this License; they are outside its scope. The act of running
the Program is not restricted, and the output from the Program is
covered only if its contents constitute a work based on the Program
(independent of having been made by running the Program). Whether
that is true depends on what the Program does.
1.
You may copy and distribute verbatim copies of the Program's source
code as you receive it, in any medium, provided that you conspicuously
and appropriately publish on each copy an appropriate copyright
notice and disclaimer of warranty; keep intact all the notices that
refer to this License and to the absence of any warranty; and give
any other recipients of the Program a copy of this License along
with the Program.
You
may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for
a fee.
2.
You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and distribute
such modifications or work under the terms of Section 1 above, provided
that you also meet all of these conditions:
a)
You must cause the modified files to carry prominent notices stating
that you changed the files and the date of any change.
b)
You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c)
If the modified program normally reads commands interactively when
run, you must cause it, when started running for such interactive
use in the most ordinary way, to print or display an announcement
including an appropriate copyright notice and a notice that there
is no warranty (or else, saying that you provide a warranty) and
that users may redistribute the program under these conditions,
and telling the user how to view a copy of this License. (Exception:
if the Program itself is interactive but does not normally print
such an announcement, your work based on the Program is not required
to print an announcement.)
These
requirements apply to the modified work as a whole. If identifiable
sections of that work are not derived from the Program, and can
be reasonably considered independent and separate works in themselves,
then this License, and its terms, do not apply to those sections
when you distribute them as separate works. But when you distribute
the same sections as part of a whole which is a work based on the
Program, the distribution of the whole must be on the terms of this
License, whose permissions for other licensees extend to the entire
whole, and thus to each and every part regardless of who wrote it.
Thus,
it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent
is to exercise the right to control the distribution of derivative
or collective works based on the Program.
In
addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume
of a storage or distribution medium does not bring the other work
under the scope of this License.
3.
You may copy and distribute the Program (or a work based on it,
under Section 2) in object code or executable form under the terms
of Sections 1 and 2 above provided that you also do one of the following:
a)
Accompany it with the complete corresponding machine-readable source
code, which must be distributed under the terms of Sections 1 and
2 above on a medium customarily used for software interchange; or,
b)
Accompany it with a written offer, valid for at least three years,
to give any third party, for a charge no more than your cost of
physically performing source distribution, a complete machine-readable
copy of the corresponding source code, to be distributed under the
terms of Sections 1 and 2 above on a medium customarily used for
software interchange; or,
c)
Accompany it with the information you received as to the offer to
distribute corresponding source code. (This alternative is allowed
only for noncommercial distribution and only if you received the
program in object code or executable form with such an offer, in
accord with Subsection b above.)
The
source code for a work means the preferred form of the work for
making modifications to it. For an executable work, complete source
code means all the source code for all modules it contains, plus
any associated interface definition files, plus the scripts used
to control compilation and installation of the executable. However,
as a special exception, the source code distributed need not include
anything that is normally distributed (in either source or binary
form) with the major components (compiler, kernel, and so on) of
the operating system on which the executable runs, unless that component
itself accompanies the executable.
If
distribution of executable or object code is made by offering access
to copy from a designated place, then offering equivalent access
to copy the source code from the same place counts as distribution
of the source code, even though third parties are not compelled
to copy the source along with the object code.
4.
You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt otherwise
to copy, modify, sublicense or distribute the Program is void, and
will automatically terminate your rights under this License. However,
parties who have received copies, or rights, from you under this
License will not have their licenses terminated so long as such
parties remain in full compliance.
5.
You are not required to accept this License, since you have not
signed it. However, nothing else grants you permission to modify
or distribute the Program or its derivative works. These actions
are prohibited by law if you do not accept this License. Therefore,
by modifying or distributing the Program (or any work based on the
Program), you indicate your acceptance of this License to do so,
and all its terms and conditions for copying, distributing or modifying
the Program or works based on it.
6.
Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the
original licensor to copy, distribute or modify the Program subject
to these terms and conditions. You may not impose any further restrictions
on the recipients' exercise of the rights granted herein. You are
not responsible for enforcing compliance by third parties to this
License.
7.
If, as a consequence of a court judgment or allegation of patent
infringement or for any other reason (not limited to patent issues),
conditions are imposed on you (whether by court order, agreement
or otherwise) that contradict the conditions of this License, they
do not excuse you from the conditions of this License. If you cannot
distribute so as to satisfy simultaneously your obligations under
this License and any other pertinent obligations, then as a consequence
you may not distribute the Program at all. For example, if a patent
license would not permit royalty-free redistribution of the Program
by all those who receive copies directly or indirectly through you,
then the only way you could satisfy both it and this License would
be to refrain entirely from distribution of the Program.
If
any portion of this section is held invalid or unenforceable under
any particular circumstance, the balance of the section is intended
to apply and the section as a whole is intended to apply in other
circumstances.
It
is not the purpose of this section to induce you to infringe any
patents or other property right claims or to contest validity of
any such claims; this section has the sole purpose of protecting
the integrity of the free software distribution system, which is
implemented by public license practices. Many people have made generous
contributions to the wide range of software distributed through
that system in reliance on consistent application of that system;
it is up to the author/donor to decide if he or she is willing to
distribute software through any other system and a licensee cannot
impose that choice.
This
section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.
8.
If the distribution and/or use of the Program is restricted in certain
countries either by patents or by copyrighted interfaces, the original
copyright holder who places the Program under this License may add
an explicit geographical distribution limitation excluding those
countries, so that distribution is permitted only in or among countries
not thus excluded. In such case, this License incorporates the limitation
as if written in the body of this License.
9.
The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ
in detail to address new problems or concerns.
Each
version is given a distinguishing version number. If the Program
specifies a version number of this License which applies to it and
"any later version", you have the option of following the terms
and conditions either of that version or of any later version published
by the Free Software Foundation. If the Program does not specify
a version number of this License, you may choose any version ever
published by the Free Software Foundation.
10.
If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the
author to ask for permission. For software which is copyrighted
by the Free Software Foundation, write to the Free Software Foundation;
we sometimes make exceptions for this. Our decision will be guided
by the two goals of preserving the free status of all derivatives
of our free software and of promoting the sharing and reuse of software
generally.
NO
WARRANTY
11.
BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT
WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER
PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
12.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING
BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE
OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER
OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
END
OF TERMS AND CONDITIONS
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