Chris@0: GNU GENERAL PUBLIC LICENSE Chris@0: Version 2, June 1991 Chris@0: Chris@0: Copyright (C) 1989, 1991 Free Software Foundation, Inc. 51 Franklin Street, Chris@0: Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and Chris@0: distribute verbatim copies of this license document, but changing it is not Chris@0: allowed. Chris@0: Chris@0: Preamble Chris@0: Chris@0: The licenses for most software are designed to take away your freedom to Chris@0: share and change it. By contrast, the GNU General Public License is Chris@0: intended to guarantee your freedom to share and change free software--to Chris@0: make sure the software is free for all its users. This General Public Chris@0: License applies to most of the Free Software Foundation's software and to Chris@0: any other program whose authors commit to using it. (Some other Free Chris@0: Software Foundation software is covered by the GNU Lesser General Public Chris@0: License instead.) You can apply it to your programs, too. Chris@0: Chris@0: When we speak of free software, we are referring to freedom, not price. Our Chris@0: General Public Licenses are designed to make sure that you have the freedom Chris@0: to distribute copies of free software (and charge for this service if you Chris@0: wish), that you receive source code or can get it if you want it, that you Chris@0: can change the software or use pieces of it in new free programs; and that Chris@0: you know you can do these things. Chris@0: Chris@0: To protect your rights, we need to make restrictions that forbid anyone to Chris@0: deny you these rights or to ask you to surrender the rights. These Chris@0: restrictions translate to certain responsibilities for you if you distribute Chris@0: copies of the software, or if you modify it. Chris@0: Chris@0: For example, if you distribute copies of such a program, whether gratis or Chris@0: for a fee, you must give the recipients all the rights that you have. You Chris@0: must make sure that they, too, receive or can get the source code. And you Chris@0: must show them these terms so they know their rights. Chris@0: Chris@0: We protect your rights with two steps: (1) copyright the software, and (2) Chris@0: offer you this license which gives you legal permission to copy, distribute Chris@0: and/or modify the software. Chris@0: Chris@0: Also, for each author's protection and ours, we want to make certain that Chris@0: everyone understands that there is no warranty for this free software. If Chris@0: the software is modified by someone else and passed on, we want its Chris@0: recipients to know that what they have is not the original, so that any Chris@0: problems introduced by others will not reflect on the original authors' Chris@0: reputations. Chris@0: Chris@0: Finally, any free program is threatened constantly by software patents. We Chris@0: wish to avoid the danger that redistributors of a free program will Chris@0: individually obtain patent licenses, in effect making the program Chris@0: proprietary. To prevent this, we have made it clear that any patent must be Chris@0: licensed for everyone's free use or not licensed at all. Chris@0: Chris@0: The precise terms and conditions for copying, distribution and modification Chris@0: follow. Chris@0: Chris@0: GNU GENERAL PUBLIC LICENSE Chris@0: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION Chris@0: Chris@0: 0. This License applies to any program or other work which contains a notice Chris@0: placed by the copyright holder saying it may be distributed under the Chris@0: terms of this General Public License. The "Program", below, refers to Chris@0: any such program or work, and a "work based on the Program" means either Chris@0: the Program or any derivative work under copyright law: that is to say, a Chris@0: work containing the Program or a portion of it, either verbatim or with Chris@0: modifications and/or translated into another language. (Hereinafter, Chris@0: translation is included without limitation in the term "modification".) Chris@0: Each licensee is addressed as "you". Chris@0: Chris@0: Activities other than copying, distribution and modification are not Chris@0: covered by this License; they are outside its scope. The act of running Chris@0: the Program is not restricted, and the output from the Program is covered Chris@0: only if its contents constitute a work based on the Program (independent Chris@0: of having been made by running the Program). Whether that is true depends Chris@0: on what the Program does. Chris@0: Chris@0: 1. You may copy and distribute verbatim copies of the Program's source code Chris@0: as you receive it, in any medium, provided that you conspicuously and Chris@0: appropriately publish on each copy an appropriate copyright notice and Chris@0: disclaimer of warranty; keep intact all the notices that refer to this Chris@0: License and to the absence of any warranty; and give any other recipients Chris@0: of the Program a copy of this License along with the Program. Chris@0: Chris@0: You may charge a fee for the physical act of transferring a copy, and you Chris@0: may at your option offer warranty protection in exchange for a fee. Chris@0: Chris@0: 2. 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You may copy and distribute the Program (or a work based on it, under Chris@0: Section 2) in object code or executable form under the terms of Sections Chris@0: 1 and 2 above provided that you also do one of the following: Chris@0: Chris@0: a) Accompany it with the complete corresponding machine-readable source Chris@0: code, which must be distributed under the terms of Sections 1 and 2 Chris@0: above on a medium customarily used for software interchange; or, Chris@0: Chris@0: b) Accompany it with a written offer, valid for at least three years, to Chris@0: give any third party, for a charge no more than your cost of Chris@0: physically performing source distribution, a complete machine-readable Chris@0: copy of the corresponding source code, to be distributed under the Chris@0: terms of Sections 1 and 2 above on a medium customarily used for Chris@0: software interchange; or, Chris@0: Chris@0: c) Accompany it with the information you received as to the offer to Chris@0: distribute corresponding source code. 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Chris@0: Chris@0: This section is intended to make thoroughly clear what is believed to be Chris@0: a consequence of the rest of this License. Chris@0: Chris@0: 8. If the distribution and/or use of the Program is restricted in certain Chris@0: countries either by patents or by copyrighted interfaces, the original Chris@0: copyright holder who places the Program under this License may add an Chris@0: explicit geographical distribution limitation excluding those countries, Chris@0: so that distribution is permitted only in or among countries not thus Chris@0: excluded. In such case, this License incorporates the limitation as if Chris@0: written in the body of this License. Chris@0: Chris@0: 9. The Free Software Foundation may publish revised and/or new versions of Chris@0: the General Public License from time to time. Such new versions will be Chris@0: similar in spirit to the present version, but may differ in detail to Chris@0: address new problems or concerns. Chris@0: Chris@0: Each version is given a distinguishing version number. If the Program Chris@0: specifies a version number of this License which applies to it and "any Chris@0: later version", you have the option of following the terms and conditions Chris@0: either of that version or of any later version published by the Free Chris@0: Software Foundation. If the Program does not specify a version number of Chris@0: this License, you may choose any version ever published by the Free Chris@0: Software Foundation. Chris@0: Chris@0: 10. If you wish to incorporate parts of the Program into other free programs Chris@0: whose distribution conditions are different, write to the author to ask Chris@0: for permission. For software which is copyrighted by the Free Software Chris@0: Foundation, write to the Free Software Foundation; we sometimes make Chris@0: exceptions for this. 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