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- GNU GENERAL PUBLIC LICENSE |
- Version 2, June 1991 |
- |
- Copyright (C) 1989, 1991 Free Software Foundation, Inc., |
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Lesser 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 |
- |
- 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., |
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Lesser General |
-Public License instead of this License. |