Chris@909: GNU GENERAL PUBLIC LICENSE Chris@909: Version 2, June 1991 Chris@909: Chris@909: Copyright (C) 1989, 1991 Free Software Foundation, Inc. 51 Franklin Street, Chris@909: Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and Chris@909: distribute verbatim copies of this license document, but changing it is not Chris@909: allowed. Chris@909: Chris@909: Preamble Chris@909: Chris@909: The licenses for most software are designed to take away your freedom to Chris@909: share and change it. By contrast, the GNU General Public License is Chris@909: intended to guarantee your freedom to share and change free software--to Chris@909: make sure the software is free for all its users. This General Public Chris@909: License applies to most of the Free Software Foundation's software and to Chris@909: any other program whose authors commit to using it. (Some other Free Chris@909: Software Foundation software is covered by the GNU Lesser General Public Chris@909: License instead.) You can apply it to your programs, too. Chris@909: Chris@909: When we speak of free software, we are referring to freedom, not price. Our Chris@909: General Public Licenses are designed to make sure that you have the freedom Chris@909: to distribute copies of free software (and charge for this service if you Chris@909: wish), that you receive source code or can get it if you want it, that you Chris@909: can change the software or use pieces of it in new free programs; and that Chris@909: you know you can do these things. Chris@909: Chris@909: To protect your rights, we need to make restrictions that forbid anyone to Chris@909: deny you these rights or to ask you to surrender the rights. These Chris@909: restrictions translate to certain responsibilities for you if you distribute Chris@909: copies of the software, or if you modify it. Chris@909: Chris@909: For example, if you distribute copies of such a program, whether gratis or Chris@909: for a fee, you must give the recipients all the rights that you have. You Chris@909: must make sure that they, too, receive or can get the source code. And you Chris@909: must show them these terms so they know their rights. Chris@909: Chris@909: We protect your rights with two steps: (1) copyright the software, and (2) Chris@909: offer you this license which gives you legal permission to copy, distribute Chris@909: and/or modify the software. Chris@909: Chris@909: Also, for each author's protection and ours, we want to make certain that Chris@909: everyone understands that there is no warranty for this free software. If Chris@909: the software is modified by someone else and passed on, we want its Chris@909: recipients to know that what they have is not the original, so that any Chris@909: problems introduced by others will not reflect on the original authors' Chris@909: reputations. Chris@909: Chris@909: Finally, any free program is threatened constantly by software patents. We Chris@909: wish to avoid the danger that redistributors of a free program will Chris@909: individually obtain patent licenses, in effect making the program Chris@909: proprietary. To prevent this, we have made it clear that any patent must be Chris@909: licensed for everyone's free use or not licensed at all. Chris@909: Chris@909: The precise terms and conditions for copying, distribution and modification Chris@909: follow. Chris@909: Chris@909: GNU GENERAL PUBLIC LICENSE Chris@909: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION Chris@909: Chris@909: 0. This License applies to any program or other work which contains a notice Chris@909: placed by the copyright holder saying it may be distributed under the Chris@909: terms of this General Public License. The "Program", below, refers to Chris@909: any such program or work, and a "work based on the Program" means either Chris@909: the Program or any derivative work under copyright law: that is to say, a Chris@909: work containing the Program or a portion of it, either verbatim or with Chris@909: modifications and/or translated into another language. (Hereinafter, Chris@909: translation is included without limitation in the term "modification".) Chris@909: Each licensee is addressed as "you". Chris@909: Chris@909: Activities other than copying, distribution and modification are not Chris@909: covered by this License; they are outside its scope. The act of running Chris@909: the Program is not restricted, and the output from the Program is covered Chris@909: only if its contents constitute a work based on the Program (independent Chris@909: of having been made by running the Program). Whether that is true depends Chris@909: on what the Program does. Chris@909: Chris@909: 1. You may copy and distribute verbatim copies of the Program's source code Chris@909: as you receive it, in any medium, provided that you conspicuously and Chris@909: appropriately publish on each copy an appropriate copyright notice and Chris@909: disclaimer of warranty; keep intact all the notices that refer to this Chris@909: License and to the absence of any warranty; and give any other recipients Chris@909: of the Program a copy of this License along with the Program. Chris@909: Chris@909: You may charge a fee for the physical act of transferring a copy, and you Chris@909: may at your option offer warranty protection in exchange for a fee. Chris@909: Chris@909: 2. You may modify your copy or copies of the Program or any portion of it, Chris@909: thus forming a work based on the Program, and copy and distribute such Chris@909: modifications or work under the terms of Section 1 above, provided that Chris@909: you also meet all of these conditions: Chris@909: Chris@909: a) You must cause the modified files to carry prominent notices stating Chris@909: that you changed the files and the date of any change. Chris@909: Chris@909: b) You must cause any work that you distribute or publish, that in whole Chris@909: or in part contains or is derived from the Program or any part Chris@909: thereof, to be licensed as a whole at no charge to all third parties Chris@909: under the terms of this License. Chris@909: Chris@909: c) If the modified program normally reads commands interactively when Chris@909: run, you must cause it, when started running for such interactive use Chris@909: in the most ordinary way, to print or display an announcement Chris@909: including an appropriate copyright notice and a notice that there is Chris@909: no warranty (or else, saying that you provide a warranty) and that Chris@909: users may redistribute the program under these conditions, and telling Chris@909: the user how to view a copy of this License. (Exception: if the Chris@909: Program itself is interactive but does not normally print such an Chris@909: announcement, your work based on the Program is not required to print Chris@909: an announcement.) Chris@909: Chris@909: These requirements apply to the modified work as a whole. If Chris@909: identifiable sections of that work are not derived from the Program, and Chris@909: can be reasonably considered independent and separate works in Chris@909: themselves, then this License, and its terms, do not apply to those Chris@909: sections when you distribute them as separate works. But when you Chris@909: distribute the same sections as part of a whole which is a work based on Chris@909: the Program, the distribution of the whole must be on the terms of this Chris@909: License, whose permissions for other licensees extend to the entire Chris@909: whole, and thus to each and every part regardless of who wrote it. Chris@909: Chris@909: Thus, it is not the intent of this section to claim rights or contest Chris@909: your rights to work written entirely by you; rather, the intent is to Chris@909: exercise the right to control the distribution of derivative or Chris@909: collective works based on the Program. Chris@909: Chris@909: In addition, mere aggregation of another work not based on the Program Chris@909: with the Program (or with a work based on the Program) on a volume of a Chris@909: storage or distribution medium does not bring the other work under the Chris@909: scope of this License. Chris@909: Chris@909: 3. You may copy and distribute the Program (or a work based on it, under Chris@909: Section 2) in object code or executable form under the terms of Sections Chris@909: 1 and 2 above provided that you also do one of the following: Chris@909: Chris@909: a) Accompany it with the complete corresponding machine-readable source Chris@909: code, which must be distributed under the terms of Sections 1 and 2 Chris@909: above on a medium customarily used for software interchange; or, Chris@909: Chris@909: b) Accompany it with a written offer, valid for at least three years, to Chris@909: give any third party, for a charge no more than your cost of Chris@909: physically performing source distribution, a complete machine-readable Chris@909: copy of the corresponding source code, to be distributed under the Chris@909: terms of Sections 1 and 2 above on a medium customarily used for Chris@909: software interchange; or, Chris@909: Chris@909: c) Accompany it with the information you received as to the offer to Chris@909: distribute corresponding source code. (This alternative is allowed Chris@909: only for noncommercial distribution and only if you received the Chris@909: program in object code or executable form with such an offer, in Chris@909: accord with Subsection b above.) Chris@909: Chris@909: The source code for a work means the preferred form of the work for Chris@909: making modifications to it. For an executable work, complete source code Chris@909: means all the source code for all modules it contains, plus any Chris@909: associated interface definition files, plus the scripts used to control Chris@909: compilation and installation of the executable. However, as a special Chris@909: exception, the source code distributed need not include anything that is Chris@909: normally distributed (in either source or binary form) with the major Chris@909: components (compiler, kernel, and so on) of the operating system on which Chris@909: the executable runs, unless that component itself accompanies the Chris@909: executable. Chris@909: Chris@909: If distribution of executable or object code is made by offering access Chris@909: to copy from a designated place, then offering equivalent access to copy Chris@909: the source code from the same place counts as distribution of the source Chris@909: code, even though third parties are not compelled to copy the source Chris@909: along with the object code. Chris@909: Chris@909: 4. You may not copy, modify, sublicense, or distribute the Program except as Chris@909: expressly provided under this License. Any attempt otherwise to copy, Chris@909: modify, sublicense or distribute the Program is void, and will Chris@909: automatically terminate your rights under this License. However, parties Chris@909: who have received copies, or rights, from you under this License will not Chris@909: have their licenses terminated so long as such parties remain in full Chris@909: compliance. Chris@909: Chris@909: 5. You are not required to accept this License, since you have not signed Chris@909: it. However, nothing else grants you permission to modify or distribute Chris@909: the Program or its derivative works. These actions are prohibited by law Chris@909: if you do not accept this License. Therefore, by modifying or Chris@909: distributing the Program (or any work based on the Program), you indicate Chris@909: your acceptance of this License to do so, and all its terms and Chris@909: conditions for copying, distributing or modifying the Program or works Chris@909: based on it. Chris@909: Chris@909: 6. Each time you redistribute the Program (or any work based on the Chris@909: Program), the recipient automatically receives a license from the Chris@909: original licensor to copy, distribute or modify the Program subject to Chris@909: these terms and conditions. You may not impose any further restrictions Chris@909: on the recipients' exercise of the rights granted herein. You are not Chris@909: responsible for enforcing compliance by third parties to this License. Chris@909: Chris@909: 7. If, as a consequence of a court judgment or allegation of patent Chris@909: infringement or for any other reason (not limited to patent issues), Chris@909: conditions are imposed on you (whether by court order, agreement or Chris@909: otherwise) that contradict the conditions of this License, they do not Chris@909: excuse you from the conditions of this License. If you cannot distribute Chris@909: so as to satisfy simultaneously your obligations under this License and Chris@909: any other pertinent obligations, then as a consequence you may not Chris@909: distribute the Program at all. For example, if a patent license would Chris@909: not permit royalty-free redistribution of the Program by all those who Chris@909: receive copies directly or indirectly through you, then the only way you Chris@909: could satisfy both it and this License would be to refrain entirely from Chris@909: distribution of the Program. Chris@909: Chris@909: If any portion of this section is held invalid or unenforceable under any Chris@909: particular circumstance, the balance of the section is intended to apply Chris@909: and the section as a whole is intended to apply in other circumstances. Chris@909: Chris@909: It is not the purpose of this section to induce you to infringe any Chris@909: patents or other property right claims or to contest validity of any such Chris@909: claims; this section has the sole purpose of protecting the integrity of Chris@909: the free software distribution system, which is implemented by public Chris@909: license practices. Many people have made generous contributions to the Chris@909: wide range of software distributed through that system in reliance on Chris@909: consistent application of that system; it is up to the author/donor to Chris@909: decide if he or she is willing to distribute software through any other Chris@909: system and a licensee cannot impose that choice. Chris@909: Chris@909: This section is intended to make thoroughly clear what is believed to be Chris@909: a consequence of the rest of this License. Chris@909: Chris@909: 8. If the distribution and/or use of the Program is restricted in certain Chris@909: countries either by patents or by copyrighted interfaces, the original Chris@909: copyright holder who places the Program under this License may add an Chris@909: explicit geographical distribution limitation excluding those countries, Chris@909: so that distribution is permitted only in or among countries not thus Chris@909: excluded. In such case, this License incorporates the limitation as if Chris@909: written in the body of this License. Chris@909: Chris@909: 9. The Free Software Foundation may publish revised and/or new versions of Chris@909: the General Public License from time to time. Such new versions will be Chris@909: similar in spirit to the present version, but may differ in detail to Chris@909: address new problems or concerns. Chris@909: Chris@909: Each version is given a distinguishing version number. If the Program Chris@909: specifies a version number of this License which applies to it and "any Chris@909: later version", you have the option of following the terms and conditions Chris@909: either of that version or of any later version published by the Free Chris@909: Software Foundation. If the Program does not specify a version number of Chris@909: this License, you may choose any version ever published by the Free Chris@909: Software Foundation. Chris@909: Chris@909: 10. If you wish to incorporate parts of the Program into other free programs Chris@909: whose distribution conditions are different, write to the author to ask Chris@909: for permission. For software which is copyrighted by the Free Software Chris@909: Foundation, write to the Free Software Foundation; we sometimes make Chris@909: exceptions for this. Our decision will be guided by the two goals of Chris@909: preserving the free status of all derivatives of our free software and Chris@909: of promoting the sharing and reuse of software generally. Chris@909: Chris@909: NO WARRANTY Chris@909: Chris@909: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR Chris@909: THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN Chris@909: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES Chris@909: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER Chris@909: EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED Chris@909: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE Chris@909: ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH Chris@909: YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL Chris@909: NECESSARY SERVICING, REPAIR OR CORRECTION. Chris@909: Chris@909: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING Chris@909: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR Chris@909: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR Chris@909: DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL Chris@909: DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM Chris@909: (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED Chris@909: INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF Chris@909: THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR Chris@909: OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.