Chris@57: GNU GENERAL PUBLIC LICENSE Chris@57: Version 2, June 1991 Chris@57: Chris@57: Copyright (C) 1989, 1991 Free Software Foundation, Inc. Chris@711: 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA Chris@57: Everyone is permitted to copy and distribute verbatim copies Chris@57: of this license document, but changing it is not allowed. Chris@57: Chris@57: Preamble Chris@57: Chris@57: The licenses for most software are designed to take away your Chris@57: freedom to share and change it. By contrast, the GNU General Public Chris@57: License is intended to guarantee your freedom to share and change free Chris@57: software--to make sure the software is free for all its users. This Chris@57: General Public License applies to most of the Free Software Chris@57: Foundation's software and to any other program whose authors commit to Chris@57: using it. (Some other Free Software Foundation software is covered by Chris@57: the GNU Library General Public License instead.) You can apply it to Chris@57: your programs, too. Chris@57: Chris@57: When we speak of free software, we are referring to freedom, not Chris@57: price. Our General Public Licenses are designed to make sure that you Chris@57: have the freedom to distribute copies of free software (and charge for Chris@57: this service if you wish), that you receive source code or can get it Chris@57: if you want it, that you can change the software or use pieces of it Chris@57: in new free programs; and that you know you can do these things. Chris@57: Chris@57: To protect your rights, we need to make restrictions that forbid Chris@57: anyone to deny you these rights or to ask you to surrender the rights. Chris@57: These restrictions translate to certain responsibilities for you if you Chris@57: distribute copies of the software, or if you modify it. Chris@57: Chris@57: For example, if you distribute copies of such a program, whether Chris@57: gratis or for a fee, you must give the recipients all the rights that Chris@57: you have. You must make sure that they, too, receive or can get the Chris@57: source code. And you must show them these terms so they know their Chris@57: rights. Chris@57: Chris@57: We protect your rights with two steps: (1) copyright the software, and Chris@57: (2) offer you this license which gives you legal permission to copy, Chris@57: distribute and/or modify the software. Chris@57: Chris@57: Also, for each author's protection and ours, we want to make certain Chris@57: that everyone understands that there is no warranty for this free Chris@57: software. If the software is modified by someone else and passed on, we Chris@57: want its recipients to know that what they have is not the original, so Chris@57: that any problems introduced by others will not reflect on the original Chris@57: authors' reputations. Chris@57: Chris@57: Finally, any free program is threatened constantly by software Chris@57: patents. We wish to avoid the danger that redistributors of a free Chris@57: program will individually obtain patent licenses, in effect making the Chris@57: program proprietary. To prevent this, we have made it clear that any Chris@57: patent must be licensed for everyone's free use or not licensed at all. Chris@57: Chris@57: The precise terms and conditions for copying, distribution and Chris@57: modification follow. Chris@57: Chris@57: GNU GENERAL PUBLIC LICENSE Chris@57: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION Chris@57: Chris@57: 0. This License applies to any program or other work which contains Chris@57: a notice placed by the copyright holder saying it may be distributed Chris@57: under the terms of this General Public License. The "Program", below, Chris@57: refers to any such program or work, and a "work based on the Program" Chris@57: means either the Program or any derivative work under copyright law: Chris@57: that is to say, a work containing the Program or a portion of it, Chris@57: either verbatim or with modifications and/or translated into another Chris@57: language. (Hereinafter, translation is included without limitation in Chris@57: the term "modification".) Each licensee is addressed as "you". Chris@57: Chris@57: Activities other than copying, distribution and modification are not Chris@57: covered by this License; they are outside its scope. The act of Chris@57: running the Program is not restricted, and the output from the Program Chris@57: is covered only if its contents constitute a work based on the Chris@57: Program (independent of having been made by running the Program). Chris@57: Whether that is true depends on what the Program does. Chris@57: Chris@57: 1. You may copy and distribute verbatim copies of the Program's Chris@57: source code as you receive it, in any medium, provided that you Chris@57: conspicuously and appropriately publish on each copy an appropriate Chris@57: copyright notice and disclaimer of warranty; keep intact all the Chris@57: notices that refer to this License and to the absence of any warranty; Chris@57: and give any other recipients of the Program a copy of this License Chris@57: along with the Program. Chris@57: Chris@57: You may charge a fee for the physical act of transferring a copy, and Chris@57: you may at your option offer warranty protection in exchange for a fee. Chris@57: Chris@57: 2. 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Chris@57: Chris@57: c) If the modified program normally reads commands interactively Chris@57: when run, you must cause it, when started running for such Chris@57: interactive use in the most ordinary way, to print or display an Chris@57: announcement including an appropriate copyright notice and a Chris@57: notice that there is no warranty (or else, saying that you provide Chris@57: a warranty) and that users may redistribute the program under Chris@57: these conditions, and telling the user how to view a copy of this Chris@57: License. (Exception: if the Program itself is interactive but Chris@57: does not normally print such an announcement, your work based on Chris@57: the Program is not required to print an announcement.) Chris@57: Chris@57: These requirements apply to the modified work as a whole. If Chris@57: identifiable sections of that work are not derived from the Program, Chris@57: and can be reasonably considered independent and separate works in Chris@57: themselves, then this License, and its terms, do not apply to those Chris@57: sections when you distribute them as separate works. But when you Chris@57: distribute the same sections as part of a whole which is a work based Chris@57: on the Program, the distribution of the whole must be on the terms of Chris@57: this License, whose permissions for other licensees extend to the Chris@57: entire whole, and thus to each and every part regardless of who wrote it. Chris@57: Chris@57: Thus, it is not the intent of this section to claim rights or contest Chris@57: your rights to work written entirely by you; rather, the intent is to Chris@57: exercise the right to control the distribution of derivative or Chris@57: collective works based on the Program. Chris@57: Chris@57: In addition, mere aggregation of another work not based on the Program Chris@57: with the Program (or with a work based on the Program) on a volume of Chris@57: a storage or distribution medium does not bring the other work under Chris@57: the scope of this License. Chris@57: Chris@57: 3. You may copy and distribute the Program (or a work based on it, Chris@57: under Section 2) in object code or executable form under the terms of Chris@57: Sections 1 and 2 above provided that you also do one of the following: Chris@57: Chris@57: a) Accompany it with the complete corresponding machine-readable Chris@57: source code, which must be distributed under the terms of Sections Chris@57: 1 and 2 above on a medium customarily used for software interchange; or, Chris@57: Chris@57: b) Accompany it with a written offer, valid for at least three Chris@57: years, to give any third party, for a charge no more than your Chris@57: cost of physically performing source distribution, a complete Chris@57: machine-readable copy of the corresponding source code, to be Chris@57: distributed under the terms of Sections 1 and 2 above on a medium Chris@57: customarily used for software interchange; or, Chris@57: Chris@57: c) Accompany it with the information you received as to the offer Chris@57: to distribute corresponding source code. (This alternative is Chris@57: allowed only for noncommercial distribution and only if you Chris@57: received the program in object code or executable form with such Chris@57: an offer, in accord with Subsection b above.) Chris@57: Chris@57: The source code for a work means the preferred form of the work for Chris@57: making modifications to it. For an executable work, complete source Chris@57: code means all the source code for all modules it contains, plus any Chris@57: associated interface definition files, plus the scripts used to Chris@57: control compilation and installation of the executable. However, as a Chris@57: special exception, the source code distributed need not include Chris@57: anything that is normally distributed (in either source or binary Chris@57: form) with the major components (compiler, kernel, and so on) of the Chris@57: operating system on which the executable runs, unless that component Chris@57: itself accompanies the executable. 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You are not required to accept this License, since you have not Chris@57: signed it. However, nothing else grants you permission to modify or Chris@57: distribute the Program or its derivative works. These actions are Chris@57: prohibited by law if you do not accept this License. Therefore, by Chris@57: modifying or distributing the Program (or any work based on the Chris@57: Program), you indicate your acceptance of this License to do so, and Chris@57: all its terms and conditions for copying, distributing or modifying Chris@57: the Program or works based on it. Chris@57: Chris@57: 6. Each time you redistribute the Program (or any work based on the Chris@57: Program), the recipient automatically receives a license from the Chris@57: original licensor to copy, distribute or modify the Program subject to Chris@57: these terms and conditions. You may not impose any further Chris@57: restrictions on the recipients' exercise of the rights granted herein. Chris@57: You are not responsible for enforcing compliance by third parties to Chris@57: this License. Chris@57: Chris@57: 7. If, as a consequence of a court judgment or allegation of patent Chris@57: infringement or for any other reason (not limited to patent issues), Chris@57: conditions are imposed on you (whether by court order, agreement or Chris@57: otherwise) that contradict the conditions of this License, they do not Chris@57: excuse you from the conditions of this License. If you cannot Chris@57: distribute so as to satisfy simultaneously your obligations under this Chris@57: License and any other pertinent obligations, then as a consequence you Chris@57: may not distribute the Program at all. For example, if a patent Chris@57: license would not permit royalty-free redistribution of the Program by Chris@57: all those who receive copies directly or indirectly through you, then Chris@57: the only way you could satisfy both it and this License would be to Chris@57: refrain entirely from distribution of the Program. Chris@57: Chris@57: If any portion of this section is held invalid or unenforceable under Chris@57: any particular circumstance, the balance of the section is intended to Chris@57: apply and the section as a whole is intended to apply in other Chris@57: circumstances. Chris@57: Chris@57: It is not the purpose of this section to induce you to infringe any Chris@57: patents or other property right claims or to contest validity of any Chris@57: such claims; this section has the sole purpose of protecting the Chris@57: integrity of the free software distribution system, which is Chris@57: implemented by public license practices. Many people have made Chris@57: generous contributions to the wide range of software distributed Chris@57: through that system in reliance on consistent application of that Chris@57: system; it is up to the author/donor to decide if he or she is willing Chris@57: to distribute software through any other system and a licensee cannot Chris@57: impose that choice. Chris@57: Chris@57: This section is intended to make thoroughly clear what is believed to Chris@57: be a consequence of the rest of this License. Chris@57: Chris@57: 8. If the distribution and/or use of the Program is restricted in Chris@57: certain countries either by patents or by copyrighted interfaces, the Chris@57: original copyright holder who places the Program under this License Chris@57: may add an explicit geographical distribution limitation excluding Chris@57: those countries, so that distribution is permitted only in or among Chris@57: countries not thus excluded. In such case, this License incorporates Chris@57: the limitation as if written in the body of this License. Chris@57: Chris@57: 9. The Free Software Foundation may publish revised and/or new versions Chris@57: of the General Public License from time to time. Such new versions will Chris@57: be similar in spirit to the present version, but may differ in detail to Chris@57: address new problems or concerns. Chris@57: Chris@57: Each version is given a distinguishing version number. If the Program Chris@57: specifies a version number of this License which applies to it and "any Chris@57: later version", you have the option of following the terms and conditions Chris@57: either of that version or of any later version published by the Free Chris@57: Software Foundation. If the Program does not specify a version number of Chris@57: this License, you may choose any version ever published by the Free Software Chris@57: Foundation. Chris@57: Chris@57: 10. If you wish to incorporate parts of the Program into other free Chris@57: programs whose distribution conditions are different, write to the author Chris@57: to ask for permission. For software which is copyrighted by the Free Chris@57: Software Foundation, write to the Free Software Foundation; we sometimes Chris@57: make exceptions for this. Our decision will be guided by the two goals Chris@57: of preserving the free status of all derivatives of our free software and Chris@57: of promoting the sharing and reuse of software generally. Chris@57: Chris@57: NO WARRANTY Chris@57: Chris@57: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY Chris@57: FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN Chris@57: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES Chris@57: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED Chris@57: OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF Chris@57: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS Chris@57: TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE Chris@57: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, Chris@57: REPAIR OR CORRECTION. Chris@57: Chris@57: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING Chris@57: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR Chris@57: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, Chris@57: INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING Chris@57: OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED Chris@57: TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY Chris@57: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER Chris@57: PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE Chris@57: POSSIBILITY OF SUCH DAMAGES. Chris@57: Chris@57: END OF TERMS AND CONDITIONS