. GNU GENERAL PUBLIC LICENSE+ Version 2, June 19918 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 yourDfreedom to share and change it. By contrast, the GNU General PublicFLicense is intended to guarantee your freedom to share and change freeDsoftware--to make sure the software is free for all its users. This;General Public License applies to most of the Free SoftwareFFoundation's software and to any other program whose authors commit toFusing it. (Some other Free Software Foundation software is covered byEthe GNU Library General Public License instead.) You can apply it toyour programs, too.B When we speak of free software, we are referring to freedom, notFprice. Our General Public Licenses are designed to make sure that youFhave the freedom to distribute copies of free software (and charge forEthis service if you wish), that you receive source code or can get itDif 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.B To protect your rights, we need to make restrictions that forbidFanyone to deny you these rights or to ask you to surrender the rights.GThese restrictions translate to certain responsibilities for you if you7distribute copies of the software, or if you modify it.B For example, if you distribute copies of such a program, whetherEgratis or for a fee, you must give the recipients all the rights thatDyou have. You must make sure that they, too, receive or can get theCsource code. And you must show them these terms so they know theirrights.H We protect your rights with two steps: (1) copyright the software, andD(2) offer you this license which gives you legal permission to copy,&distribute and/or modify the software.F Also, for each author's protection and ours, we want to make certainAthat everyone understands that there is no warranty for this freeHsoftware. If the software is modified by someone else and passed on, weGwant its recipients to know that what they have is not the original, soGthat any problems introduced by others will not reflect on the originalauthors' reputations.@ Finally, any free program is threatened constantly by softwareCpatents. We wish to avoid the danger that redistributors of a freeFprogram will individually obtain patent licenses, in effect making theEprogram proprietary. To prevent this, we have made it clear that anyGpatent must be licensed for everyone's free use or not licensed at all.@ The precise terms and conditions for copying, distribution andmodification follow.. GNU GENERAL PUBLIC LICENSEB TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATIONE 0. This License applies to any program or other work which containsDa notice placed by the copyright holder saying it may be distributedFunder the terms of this General Public License. The "Program", below,Erefers to any such program or work, and a "work based on the Program"Dmeans either the Program or any derivative work under copyright law:Athat is to say, a work containing the Program or a portion of it,Deither verbatim or with modifications and/or translated into anotherFlanguage. (Hereinafter, translation is included without limitation in?the term "modification".) Each licensee is addressed as "you".DActivities other than copying, distribution and modification are not@covered by this License; they are outside its scope. The act ofFrunning the Program is not restricted, and the output from the Program>is covered only if its contents constitute a work based on theAProgram (independent of having been made by running the Program).6Whether that is true depends on what the Program does.A 1. You may copy and distribute verbatim copies of the Program's?source code as you receive it, in any medium, provided that youCconspicuously and appropriately publish on each copy an appropriate@copyright notice and disclaimer of warranty; keep intact all theFnotices that refer to this License and to the absence of any warranty;Cand give any other recipients of the Program a copy of this Licensealong with the Program.EYou may charge a fee for the physical act of transferring a copy, andGyou may at your option offer warranty protection in exchange for a fee.E 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 andBdistribute such modifications or work under the terms of Section 1;above, provided that you also meet all of these conditions:C a) You must cause the modified files to carry prominent noticesB stating that you changed the files and the date of any change.F b) You must cause any work that you distribute or publish, that inC whole or in part contains or is derived from the Program or anyE part thereof, to be licensed as a whole at no charge to all third, parties under the terms of this License.D c) If the modified program normally reads commands interactively> when run, you must cause it, when started running for suchD interactive use in the most ordinary way, to print or display an@ announcement including an appropriate copyright notice and aF notice that there is no warranty (or else, saying that you provideA a warranty) and that users may redistribute the program underE these conditions, and telling the user how to view a copy of thisB License. (Exception: if the Program itself is interactive butD 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. IfDidentifiable sections of that work are not derived from the Program,Band can be reasonably considered independent and separate works inCthemselves, then this License, and its terms, do not apply to thoseBsections when you distribute them as separate works. But when youEdistribute the same sections as part of a whole which is a work basedEon the Program, the distribution of the whole must be on the terms ofAthis License, whose permissions for other licensees extend to theIentire whole, and thus to each and every part regardless of who wrote it.EThus, it is not the intent of this section to claim rights or contestEyour 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.FIn addition, mere aggregation of another work not based on the ProgramEwith the Program (or with a work based on the Program) on a volume ofDa storage or distribution medium does not bring the other work underthe scope of this License.D 3. You may copy and distribute the Program (or a work based on it,Eunder Section 2) in object code or executable form under the terms ofFSections 1 and 2 above provided that you also do one of the following:D a) Accompany it with the complete corresponding machine-readableF source code, which must be distributed under the terms of SectionsL 1 and 2 above on a medium customarily used for software interchange; or,B b) Accompany it with a written offer, valid for at least threeB years, to give any third party, for a charge no more than yourA cost of physically performing source distribution, a completeA machine-readable copy of the corresponding source code, to beE distributed under the terms of Sections 1 and 2 above on a medium2 customarily used for software interchange; or,E c) Accompany it with the information you received as to the offerB to distribute corresponding source code. (This alternative is? allowed only for noncommercial distribution and only if youD received the program in object code or executable form with such1 an offer, in accord with Subsection b above.)CThe source code for a work means the preferred form of the work forDmaking modifications to it. For an executable work, complete sourceDcode means all the source code for all modules it contains, plus any?associated interface definition files, plus the scripts used toFcontrol compilation and installation of the executable. However, as a?special exception, the source code distributed need not includeAanything that is normally distributed (in either source or binaryDform) with the major components (compiler, kernel, and so on) of theDoperating 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 asBdistribution of the source code, even though third parties are not8compelled to copy the source along with the object code.D 4. You may not copy, modify, sublicense, or distribute the Program=except as expressly provided under this License. Any attemptBotherwise to copy, modify, sublicense or distribute the Program isFvoid, and will automatically terminate your rights under this License.DHowever, parties who have received copies, or rights, from you underDthis License will not have their licenses terminated so long as such"parties remain in full compliance.D 5. You are not required to accept this License, since you have notDsigned it. However, nothing else grants you permission to modify orBdistribute the Program or its derivative works. These actions areCprohibited by law if you do not accept this License. Therefore, by?modifying or distributing the Program (or any work based on theDProgram), you indicate your acceptance of this License to do so, andCall its terms and conditions for copying, distributing or modifying!the Program or works based on it.E 6. Each time you redistribute the Program (or any work based on theAProgram), the recipient automatically receives a license from theForiginal licensor to copy, distribute or modify the Program subject to;these terms and conditions. You may not impose any furtherFrestrictions on the recipients' exercise of the rights granted herein.DYou are not responsible for enforcing compliance by third parties to this License.E 7. If, as a consequence of a court judgment or allegation of patentDinfringement or for any other reason (not limited to patent issues),Cconditions are imposed on you (whether by court order, agreement orFotherwise) that contradict the conditions of this License, they do not>excuse you from the conditions of this License. If you cannotFdistribute so as to satisfy simultaneously your obligations under thisFLicense and any other pertinent obligations, then as a consequence you@may not distribute the Program at all. For example, if a patentFlicense would not permit royalty-free redistribution of the Program byEall those who receive copies directly or indirectly through you, thenCthe only way you could satisfy both it and this License would be to2refrain entirely from distribution of the Program.EIf any portion of this section is held invalid or unenforceable underFany particular circumstance, the balance of the section is intended to>apply and the section as a whole is intended to apply in othercircumstances.CIt is not the purpose of this section to induce you to infringe anyDpatents 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 distributedAthrough that system in reliance on consistent application of thatFsystem; it is up to the author/donor to decide if he or she is willingEto distribute software through any other system and a licensee cannotimpose that choice.EThis section is intended to make thoroughly clear what is believed to-be a consequence of the rest of this License.C 8. If the distribution and/or use of the Program is restricted inEcertain countries either by patents or by copyrighted interfaces, theCoriginal copyright holder who places the Program under this LicenseBmay add an explicit geographical distribution limitation excludingCthose countries, so that distribution is permitted only in or amongEcountries not thus excluded. In such case, this License incorporates9the limitation as if written in the body of this License.I 9. The Free Software Foundation may publish revised and/or new versionsHof the General Public License from time to time. Such new versions willHbe similar in spirit to the present version, but may differ in detail to!address new problems or concerns.FEach version is given a distinguishing version number. If the ProgramGspecifies a version number of this License which applies to it and "anyIlater version", you have the option of following the terms and conditionsDeither of that version or of any later version published by the FreeISoftware Foundation. If the Program does not specify a version number ofLthis License, you may choose any version ever published by the Free SoftwareFoundation.E 10. If you wish to incorporate parts of the Program into other freeIprograms whose distribution conditions are different, write to the authorEto ask for permission. For software which is copyrighted by the FreeHSoftware Foundation, write to the Free Software Foundation; we sometimesGmake exceptions for this. Our decision will be guided by the two goalsIof preserving the free status of all derivatives of our free software and9of promoting the sharing and reuse of software generally.' NO WARRANTYJ 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTYHFOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHENFOTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIESJPROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSEDDOR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OFIMERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK ASFTO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THEHPROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,REPAIR OR CORRECTION.K 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITINGCWILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/ORJREDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,KINCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISINGIOUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITEDHTO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BYJYOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHEREPROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGES.0 END OF TERMS AND CONDITIONS? Appendix: How to Apply These Terms to Your New ProgramsE If you develop a new program, and you want it to be of the greatestFpossible use to the public, the best way to achieve this is to make itKfree software which everyone can redistribute and change under these terms.F To do so, attach the following notices to the program. It is safestCto attach them to the start of each source file to most effectivelyDconvey the exclusion of warranty; and each file should have at leastEthe "copyright" line and a pointer to where the full notice is found.K ( Copyright (C) 19yy H This program is free software; you can redistribute it and/or modifyH it under the terms of the GNU General Public License as published byE the Free Software Foundation; either version 2 of the License, or' (at your option) any later version.C This program is distributed in the hope that it will be useful,B but WITHOUT ANY WARRANTY; without even the implied warranty ofA MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the0 GNU General Public License for more details.E 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., 675 Mass Ave, Cambridge, MA 02139, USA.HAlso add information on how to contact you by electronic and paper mail.FIf the program is interactive, make it output a short notice like this&when it starts in an interactive mode:= Gnomovision version 69, Copyright (C) 19yy name of authorM Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.A This is free software, and you are welcome to redistribute it8 under certain conditions; type `show c' for details.KThe hypothetical commands `show w' and `show c' should show the appropriateIparts of the General Public License. Of course, the commands you use mayHbe called something other than `show w' and `show c'; they could even be8mouse-clicks or menu items--whatever suits your program.GYou should also get your employer (if you work as a programmer) or yourDschool, if any, to sign a "copyright disclaimer" for the program, if.necessary. Here is a sample; alter the names:H Yoyodyne, Inc., hereby disclaims all copyright interest in the programJ `Gnomovision' (which makes passes at compilers) written by James Hacker.& , 1 April 1989 Ty Coon, President of ViceKThis General Public License does not permit incorporating your program intoGproprietary programs. If your program is a subroutine library, you mayKconsider it more useful to permit linking proprietary applications with theElibrary. If this is what you want to do, use the GNU Library General'Public License instead of this License.