LICENSE
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- The GNU General Public License (GPL)
- 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
- How to Apply These Terms to Your New Programs
- If you develop a new program, and you want it to be of the greatest possible use
- to the public, the best way to achieve this is to make it free software which
- everyone can redistribute and change under these terms.
- To do so, attach the following notices to the program. It is safest to attach
- them to the start of each source file to most effectively convey the exclusion
- of warranty; and each file should have at least the "copyright" line and a
- pointer to where the full notice is found.
- One line to give the program's name and a brief idea of what it does.
- Copyright (C) <year> <name of author>
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 2 of the License, or (at your option) any
- later version.
- This program is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along with
- this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- Place, Suite 330, Boston, MA 02111-1307 USA
- Also add information on how to contact you by electronic and paper mail.
- If the program is interactive, make it output a short notice like this when it
- starts in an interactive mode:
- Gnomovision version 69, Copyright (C) year name of author Gnomovision comes
- with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software,
- and you are welcome to redistribute it under certain conditions; type `show c'
- for details.
- The hypothetical commands `show w' and `show c' should show the appropriate
- parts of the General Public License. Of course, the commands you use may be
- called something other than `show w' and `show c'; they could even be
- mouse-clicks or menu items--whatever suits your program.
- You should also get your employer (if you work as a programmer) or your school,
- if any, to sign a "copyright disclaimer" for the program, if necessary. Here is
- a sample; alter the names:
- Yoyodyne, Inc., hereby disclaims all copyright interest in the program
- `Gnomovision' (which makes passes at compilers) written by James Hacker.
- signature of Ty Coon, 1 April 1989
- Ty Coon, President of Vice
- This General Public License does not permit incorporating your program into
- proprietary programs. If your program is a subroutine library, you may consider
- it more useful to permit linking proprietary applications with the library. If
- this is what you want to do, use the GNU Library General Public License instead
- of this License.