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- GNU GENERAL PUBLIC LICENSE
- Version 2, June 1991
- Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave,
- Cambridge, MA 02139, 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
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- 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.
- 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
- 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
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- 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
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- source distribution, a complete machine-readable copy of the corresponding
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- 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
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- The source code for a work means the preferred form of the work for
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- 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
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