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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
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 limita-
tion in the term "modification".) Each licensee is
addressed as "you".
Activities other than copying, distribution and modifi-
cation are not covered by this License; they are out-
side 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 Pro-
gram's source code as you receive it, in any medium,
provided that you conspicuously and appropriately pub-
lish 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 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 conditions:
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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 interactive but does not normally print
such an announcement, your work based on the Pro-
gram 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 consid-
ered independent and separate works in themselves, then
this License, and its terms, do not apply to those sec-
tions 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 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 distribu-
tion 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 exe-
cutable form under the terms of Sections 1 and 2 above
provided that you also do one of the following:
-3-
a. Accompany it with the complete corresponding
machine-readable source code, which must be dis-
tributed under the terms of Sections 1 and 2 above
on a medium customarily used for software inter-
change; 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 per-
forming 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 non-
commercial 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 exe-
cutable 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 dis-
tributed 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, subli-
cense or distribute the Program is void, and will auto-
matically 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
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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 modi-
fying 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 per-
tinent obligations, then as a consequence you may not
distribute the Program at all. For example, if a
patent license would not permit royalty-free redistri-
bution 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 unen-
forceable under any particular circumstance, the bal-
ance of the section is intended to apply and the sec-
tion as a whole is intended to apply in other circum-
stances.
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 consis-
tent application of that system; it is up to the
author/donor to decide if he or she is willing to dis-
tribute software through any other system and a
licensee cannot impose that choice.
-5-
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 condi-
tions either of that version or of any later version
published by the Free Software Foundation. If the Pro-
gram 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 sta-
tus of all derivatives of our free software and of pro-
moting 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 PRO-
VIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
NESS 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.
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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, INCLUD-
ING 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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