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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 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.
-
-
- 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 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
-