is ditributed under the GNU GENERAL PUBLIC LICENSE
as set forth below:
GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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
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.
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
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:
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.
- 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.)
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:
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.
- 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.)
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
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
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
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
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the
greatest possible use to the public, the best way to achieve
this is to make it free software which everyone can redistribute
and change under these terms.
To do so, attach the following notices to the program. It
is safest to attach them to the start of each source file
to most effectively convey the exclusion of warranty; and
each file should have at least the "copyright" line and a
pointer to where the full notice is found.
one line to give the program's name and an idea of what it does.
Copyright (C) yyyy name of author
This program 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 2
of the License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Also add information on how to contact you by electronic
and paper mail.
If the program is interactive, make it output a short notice
like this when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
type `show w'. This is free software, and you are welcome
to redistribute it under certain conditions; type `show c'
The hypothetical commands `show w' and `show
c' should show the appropriate parts of the General
Public License. Of course, the commands you use may be called
something other than `show w' and `show
c'; they could even be mouse-clicks or menu items--whatever
suits your program.
You should also get your employer (if you work as a programmer)
or your school, if any, to sign a "copyright disclaimer" for
the program, if necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright
interest in the program `Gnomovision'
(which makes passes at compilers) written
by James Hacker.
signature of Ty Coon, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating
your program into proprietary programs. If your program is
a subroutine library, you may consider it more useful to permit
linking proprietary applications with the library. If this
is what you want to do, use the GNU Library General Public
License instead of this License.