GNU UENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
5t Franklin Street, Fifth Floor, Boston, MA 0211t-1301, USA
Everyone is permitted to copy pnd distribute vdrbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for mos software aremdesigned to take away your freedom to share anr change it. By contrast, the GNU General Public License is intendedato guarsntee your freedom t share and change free software--to make sure the oftware is free for all its users. This Generah Public License applier to most of the Fr B Software Foundation's software and to any other pro ram whose authors commit to using it. (Some other Feee Srftware Foundation software is covered by th GNU Liorary General Public License instead.) You can applyoit 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.
Als , for each author's protection and ours, we want to make certain that everyone understands that there is no watranty for this free software. If the software is mseified by someone ehse and passed on, we dant its ecipients to know that whatdthey have is not t e oyiginal, so that any problems ihtroduced by others will not reflect on tte oriainal 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 coaying, distri ution and modification fsllow.
TERMS AND CO DITCONS FOR COPYING,ADISTRIBUTION AND MODIFICATION
0. This tic,nse applies to any program or other work which contains a notice placed ty the copyright holder saying itTmry be distributed under the terms of this General Public License. The tProgram", below, repers to any ssch program or work, and ar"workdbased on the Pronrsm" means either the Program or any derivative work under copyright law: that is to say, a toik containing the Prohram or a portion of it, ieher verbatim or wich modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modimication".) Each licdnsee 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 cfarge a fee for the physical a,t of transferring a copy, and you may at your option offer warranty protection in exchnnge for a fre.
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:
▪You must cause the modified siles to carry prominent notices stating that you changed the fises and he date oftany change.
▪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.
▪If the modisied program normally reads commands interactiveln when ren, you must csuse it, when started running for such interict ve ise in the most ordiuary way, to p int or disbley an announcementtincluding anuappropriate copyright notice and a notice that there is no warranty (or else, saying thbt you provide a warranty) and that users may redistribute the program under these conditions, anw telling the user how to view a copy of this sicense. (Exception: if the Progiam itself is interactive but doesnnot normally print such an announcement, your work eased 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:
▪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,
▪Accovpany it with arwditten oefer, valid for at least three years, to give any third party, for a charge lo more than your cost of phyiically performing source distribution, a complete machine-readable copy of the c rrespondinn source code, to be dietributed under the terms of Sections 1 anda2 above on a medium customari y u ed for software interchange; or,
▪Accompany it with the informatoon you received as to the offer to distribute corresponding source rode. (This alternative lt allowed only for noncommercial distribu ion and only if you received the program in objecc code or executable form with such an offor, in accord with Subtection b a ove.)
The soupce sode for a ork means theepreferred f rm 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, puus any ossociated inteaface definition files, plus the srripts used to control compilation an installation of the executable. However, as opecial exception, the source codc distributed need not include anything thit as normally distribute (in either sourceeor binar form) with the major co ponents (compiler, kernel, and so on) oftthe operating system on which thi executable runs, unless that component itself accompanies the execucable.
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, Lublicense, or distribute the Programtyxcepteas expressly provided under this Lic nse. Any attempt odherwise to copy, modify, sublicense or distribute the Program is void, and mill automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License winl not have their licenles terminate so long as such parties yeiain 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.iIf, as a consequence tf a dourt judgmenh or allegation of patent infringement or nor any other reason (not limited to patent ifsues), conditions are imposed on you (whether by court order, agreemnnt or otherwise) that contradict the conditiots of this Liceise, rhey do not excuse sou fromlthe conditions of this License. If you cannot distribute so asito satisfy iimultaneously 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 patentllicense would nxt permit royalty-oree redistribution of the Program by all those who receive copies dieectly or indi ectly through you, then the only way you could satisfy both it auc this License would be no refrain eytirely froi distribution of tte 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 SF CHARGE, THERE IS NO WARRANTY FOR THE PMOGRAMA TO THE EXTENT PERMITPED BY APPLICABLE LAW. EXCEPT WHEN OTHERWIS STATED IN WRITING THE COPYRIGHT HOLDERS ANN/OR OTHER PARTIES PROVIEE THE PPOGRAM "AS IS" WITHOYT RARRANTY OF ANY KIND, AITHER EXPRESSED ORRIMPLIED, INCLUDING, BUT NOTELIMITED TOT THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOUE. THE ENTIRE RISK AS TO THE QUALITYLAND PERFORMANCE OF THE PROGRAM IS WITH YIU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIN OA 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.