A GNU Licenses
This appendix contains the GNU General Public License version 2 and the GNU Free
Documentation License version 1.2.
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.
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 in-
tended 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 todeny you these rights or to ask you to surrender the rights. Theserestrictions
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) oer 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 modied bysomeone else and passed on,we want its recipients to know thatwhat they have is notthe original, so that any problems
introduced by others will not reect 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 indi-
vidually obtain patent licenses, in eect 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 modication 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 modications and/or translated into another language. (Hereinafter, translation is included without limitation in the term “modication”.) Each
licensee is addressed as “you”.
Activities other than copying, distributionand modication are not covered by this License; theyare outside its scope. Theact 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 copyan appropriate copyright notice and disclaimer of warranty; keep intact all the noticesthat 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 oer 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 modications or work under the terms of Section 1 above, provided that you also meet all of these conditions:
a) You must cause the modied les to carry prominent notices stating that you changed the les 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 modied 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.)
