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- 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 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 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 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 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.
-
- 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:
-
- * 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.)
-
- 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.
-
- 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:
-
- * 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.)
-
- 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.
-
- 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, 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
- 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 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
-
-