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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.
-
- 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
-