gpl(7)

NAME

gpl - GNU General Public License

DESCRIPTION

GNU GENERAL PUBLIC LICENSE

Version 2, June 1991
Copyright (c) 1989, 1991 Free Software Foundation,
Inc.
51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA
Everyone is permitted to copy and distribute ver
batim 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 Gen
eral 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 Soft
ware
Foundation's software and to any other program whose au
thors 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 permis
sion 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 ef
fect 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 li
censed at all.

The precise terms and conditions for copying, distribu
tion 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 Li
cense. 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 con
taining the Program or a portion of it, either verbatim or with
modifications and/or translated into another language. (Here
inafter, translation is included without limitation in the term
"modification".) Each licensee is addressed as "you".

Activities other than copying, distribution and modi
fication 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 consti
tute 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 in
tact all the notices that refer to this License and to the ab
sence of any warranty; and give any other recipients of the Pro
gram a copy of this License along with the Program.

You may charge a fee for the physical act of transfer
ring 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 condi
tions:

a. You must cause the modified files to carry promi
nent 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 interac
tive 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 distri
bution 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 dis
tribution 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 ma
chine-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 al
ternative 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 distribut
ed (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 par
ties 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 un
der 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 Li
cense. 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 copy
ing, 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 li
cense 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 simultaneous
ly 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 per
mit 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 re
frain entirely from distribution of the Program.

If any portion of this section is held invalid or un
enforceable under any particular circumstance, the balance of the
section is intended to apply and the section as a whole is in
tended 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 sys
tem, which is implemented by public license practices. Many peo
ple have made generous contributions to the wide range of soft
ware distributed through that system in reliance on consistent
application of that system; it is up to the author/donor to de
cide 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 re
stricted 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 con
cerns.

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 APPLI
CABLE 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 PAR
TY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED
ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPE
CIAL, 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 SUS
TAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OP
ERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PAR
TY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
Appendix: 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 no
tice is found.

<one line to give the program's name and a brief
idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redis
tribute it and/or modify
it under the terms of the GNU General Public Li
cense 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 PUR
POSE. 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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA
Also add information on how to contact you by electronic
and paper mail.
If the program is interactive, make it output a short no
tice 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 re
distribute it
under certain conditions; type `show c' for de
tails.
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---what
ever suits your program.
You should also get your employer (if you work as a pro
grammer) 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 in
terest 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.

SEE ALSO

gfdl(7), fsf-funding(7).

COPYRIGHT

Copyright (c) 1989, 1991 Free Software Foundation, Inc.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
Everyone is permitted to copy and distribute verbatim
copies of this license document, but changing it is not allowed.
gcc-4.1.1 2006-05-24
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