GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Cop
yright (C) 1989, 1991 Free Software Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
Ever
yone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
Preamble
The licenses for most soft
ware 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 Soft
ware Foundation software is covered by the GNU Lesser 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
kno
w 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
cop
y, 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
soft
ware. 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 an
y problems introduced by others will not reflect on the original authors' reputations.
Finall
y, 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
an
y 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", belo
w, refers to any such program or work, and a "work
based on the Program" means either the Program or an
y 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
in
cluded without limitation in the term "modification".) Each licensee is addressed as "you".
Act
ivities 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 b
y 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 an
y 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.
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