Chris@198: GNU GENERAL PUBLIC LICENSE Chris@198: Version 2, June 1991 Chris@198: Chris@198: Copyright (C) 1989, 1991 Free Software Foundation, Inc. Chris@198: 675 Mass Ave, Cambridge, MA 02139, USA Chris@198: Everyone is permitted to copy and distribute verbatim copies Chris@198: of this license document, but changing it is not allowed. Chris@198: Chris@198: Preamble Chris@198: Chris@198: The licenses for most software are designed to take away your Chris@198: freedom to share and change it. By contrast, the GNU General Public Chris@198: License is intended to guarantee your freedom to share and change free Chris@198: software--to make sure the software is free for all its users. This Chris@198: General Public License applies to most of the Free Software Chris@198: Foundation's software and to any other program whose authors commit to Chris@198: using it. (Some other Free Software Foundation software is covered by Chris@198: the GNU Library General Public License instead.) You can apply it to Chris@198: your programs, too. Chris@198: Chris@198: When we speak of free software, we are referring to freedom, not Chris@198: price. Our General Public Licenses are designed to make sure that you Chris@198: have the freedom to distribute copies of free software (and charge for Chris@198: this service if you wish), that you receive source code or can get it Chris@198: if you want it, that you can change the software or use pieces of it Chris@198: in new free programs; and that you know you can do these things. Chris@198: Chris@198: To protect your rights, we need to make restrictions that forbid Chris@198: anyone to deny you these rights or to ask you to surrender the rights. Chris@198: These restrictions translate to certain responsibilities for you if you Chris@198: distribute copies of the software, or if you modify it. Chris@198: Chris@198: For example, if you distribute copies of such a program, whether Chris@198: gratis or for a fee, you must give the recipients all the rights that Chris@198: you have. You must make sure that they, too, receive or can get the Chris@198: source code. And you must show them these terms so they know their Chris@198: rights. Chris@198: Chris@198: We protect your rights with two steps: (1) copyright the software, and Chris@198: (2) offer you this license which gives you legal permission to copy, Chris@198: distribute and/or modify the software. Chris@198: Chris@198: Also, for each author's protection and ours, we want to make certain Chris@198: that everyone understands that there is no warranty for this free Chris@198: software. If the software is modified by someone else and passed on, we Chris@198: want its recipients to know that what they have is not the original, so Chris@198: that any problems introduced by others will not reflect on the original Chris@198: authors' reputations. Chris@198: Chris@198: Finally, any free program is threatened constantly by software Chris@198: patents. We wish to avoid the danger that redistributors of a free Chris@198: program will individually obtain patent licenses, in effect making the Chris@198: program proprietary. To prevent this, we have made it clear that any Chris@198: patent must be licensed for everyone's free use or not licensed at all. Chris@198: Chris@198: The precise terms and conditions for copying, distribution and Chris@198: modification follow. Chris@198: Chris@198: GNU GENERAL PUBLIC LICENSE Chris@198: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION Chris@198: Chris@198: 0. This License applies to any program or other work which contains Chris@198: a notice placed by the copyright holder saying it may be distributed Chris@198: under the terms of this General Public License. The "Program", below, Chris@198: refers to any such program or work, and a "work based on the Program" Chris@198: means either the Program or any derivative work under copyright law: Chris@198: that is to say, a work containing the Program or a portion of it, Chris@198: either verbatim or with modifications and/or translated into another Chris@198: language. (Hereinafter, translation is included without limitation in Chris@198: the term "modification".) Each licensee is addressed as "you". Chris@198: Chris@198: Activities other than copying, distribution and modification are not Chris@198: covered by this License; they are outside its scope. The act of Chris@198: running the Program is not restricted, and the output from the Program Chris@198: is covered only if its contents constitute a work based on the Chris@198: Program (independent of having been made by running the Program). Chris@198: Whether that is true depends on what the Program does. Chris@198: Chris@198: 1. You may copy and distribute verbatim copies of the Program's Chris@198: source code as you receive it, in any medium, provided that you Chris@198: conspicuously and appropriately publish on each copy an appropriate Chris@198: copyright notice and disclaimer of warranty; keep intact all the Chris@198: notices that refer to this License and to the absence of any warranty; Chris@198: and give any other recipients of the Program a copy of this License Chris@198: along with the Program. Chris@198: Chris@198: You may charge a fee for the physical act of transferring a copy, and Chris@198: you may at your option offer warranty protection in exchange for a fee. Chris@198: Chris@198: 2. You may modify your copy or copies of the Program or any portion Chris@198: of it, thus forming a work based on the Program, and copy and Chris@198: distribute such modifications or work under the terms of Section 1 Chris@198: above, provided that you also meet all of these conditions: Chris@198: Chris@198: a) You must cause the modified files to carry prominent notices Chris@198: stating that you changed the files and the date of any change. Chris@198: Chris@198: b) You must cause any work that you distribute or publish, that in Chris@198: whole or in part contains or is derived from the Program or any Chris@198: part thereof, to be licensed as a whole at no charge to all third Chris@198: parties under the terms of this License. Chris@198: Chris@198: c) If the modified program normally reads commands interactively Chris@198: when run, you must cause it, when started running for such Chris@198: interactive use in the most ordinary way, to print or display an Chris@198: announcement including an appropriate copyright notice and a Chris@198: notice that there is no warranty (or else, saying that you provide Chris@198: a warranty) and that users may redistribute the program under Chris@198: these conditions, and telling the user how to view a copy of this Chris@198: License. (Exception: if the Program itself is interactive but Chris@198: does not normally print such an announcement, your work based on Chris@198: the Program is not required to print an announcement.) Chris@198: Chris@198: These requirements apply to the modified work as a whole. If Chris@198: identifiable sections of that work are not derived from the Program, Chris@198: and can be reasonably considered independent and separate works in Chris@198: themselves, then this License, and its terms, do not apply to those Chris@198: sections when you distribute them as separate works. But when you Chris@198: distribute the same sections as part of a whole which is a work based Chris@198: on the Program, the distribution of the whole must be on the terms of Chris@198: this License, whose permissions for other licensees extend to the Chris@198: entire whole, and thus to each and every part regardless of who wrote it. Chris@198: Chris@198: Thus, it is not the intent of this section to claim rights or contest Chris@198: your rights to work written entirely by you; rather, the intent is to Chris@198: exercise the right to control the distribution of derivative or Chris@198: collective works based on the Program. Chris@198: Chris@198: In addition, mere aggregation of another work not based on the Program Chris@198: with the Program (or with a work based on the Program) on a volume of Chris@198: a storage or distribution medium does not bring the other work under Chris@198: the scope of this License. Chris@198: Chris@198: 3. You may copy and distribute the Program (or a work based on it, Chris@198: under Section 2) in object code or executable form under the terms of Chris@198: Sections 1 and 2 above provided that you also do one of the following: Chris@198: Chris@198: a) Accompany it with the complete corresponding machine-readable Chris@198: source code, which must be distributed under the terms of Sections Chris@198: 1 and 2 above on a medium customarily used for software interchange; or, Chris@198: Chris@198: b) Accompany it with a written offer, valid for at least three Chris@198: years, to give any third party, for a charge no more than your Chris@198: cost of physically performing source distribution, a complete Chris@198: machine-readable copy of the corresponding source code, to be Chris@198: distributed under the terms of Sections 1 and 2 above on a medium Chris@198: customarily used for software interchange; or, Chris@198: Chris@198: c) Accompany it with the information you received as to the offer Chris@198: to distribute corresponding source code. (This alternative is Chris@198: allowed only for noncommercial distribution and only if you Chris@198: received the program in object code or executable form with such Chris@198: an offer, in accord with Subsection b above.) Chris@198: Chris@198: The source code for a work means the preferred form of the work for Chris@198: making modifications to it. For an executable work, complete source Chris@198: code means all the source code for all modules it contains, plus any Chris@198: associated interface definition files, plus the scripts used to Chris@198: control compilation and installation of the executable. However, as a Chris@198: special exception, the source code distributed need not include Chris@198: anything that is normally distributed (in either source or binary Chris@198: form) with the major components (compiler, kernel, and so on) of the Chris@198: operating system on which the executable runs, unless that component Chris@198: itself accompanies the executable. Chris@198: Chris@198: If distribution of executable or object code is made by offering Chris@198: access to copy from a designated place, then offering equivalent Chris@198: access to copy the source code from the same place counts as Chris@198: distribution of the source code, even though third parties are not Chris@198: compelled to copy the source along with the object code. Chris@198: Chris@198: 4. You may not copy, modify, sublicense, or distribute the Program Chris@198: except as expressly provided under this License. Any attempt Chris@198: otherwise to copy, modify, sublicense or distribute the Program is Chris@198: void, and will automatically terminate your rights under this License. Chris@198: However, parties who have received copies, or rights, from you under Chris@198: this License will not have their licenses terminated so long as such Chris@198: parties remain in full compliance. Chris@198: Chris@198: 5. You are not required to accept this License, since you have not Chris@198: signed it. However, nothing else grants you permission to modify or Chris@198: distribute the Program or its derivative works. These actions are Chris@198: prohibited by law if you do not accept this License. Therefore, by Chris@198: modifying or distributing the Program (or any work based on the Chris@198: Program), you indicate your acceptance of this License to do so, and Chris@198: all its terms and conditions for copying, distributing or modifying Chris@198: the Program or works based on it. Chris@198: Chris@198: 6. Each time you redistribute the Program (or any work based on the Chris@198: Program), the recipient automatically receives a license from the Chris@198: original licensor to copy, distribute or modify the Program subject to Chris@198: these terms and conditions. You may not impose any further Chris@198: restrictions on the recipients' exercise of the rights granted herein. Chris@198: You are not responsible for enforcing compliance by third parties to Chris@198: this License. Chris@198: Chris@198: 7. If, as a consequence of a court judgment or allegation of patent Chris@198: infringement or for any other reason (not limited to patent issues), Chris@198: conditions are imposed on you (whether by court order, agreement or Chris@198: otherwise) that contradict the conditions of this License, they do not Chris@198: excuse you from the conditions of this License. If you cannot Chris@198: distribute so as to satisfy simultaneously your obligations under this Chris@198: License and any other pertinent obligations, then as a consequence you Chris@198: may not distribute the Program at all. For example, if a patent Chris@198: license would not permit royalty-free redistribution of the Program by Chris@198: all those who receive copies directly or indirectly through you, then Chris@198: the only way you could satisfy both it and this License would be to Chris@198: refrain entirely from distribution of the Program. Chris@198: Chris@198: If any portion of this section is held invalid or unenforceable under Chris@198: any particular circumstance, the balance of the section is intended to Chris@198: apply and the section as a whole is intended to apply in other Chris@198: circumstances. Chris@198: Chris@198: It is not the purpose of this section to induce you to infringe any Chris@198: patents or other property right claims or to contest validity of any Chris@198: such claims; this section has the sole purpose of protecting the Chris@198: integrity of the free software distribution system, which is Chris@198: implemented by public license practices. Many people have made Chris@198: generous contributions to the wide range of software distributed Chris@198: through that system in reliance on consistent application of that Chris@198: system; it is up to the author/donor to decide if he or she is willing Chris@198: to distribute software through any other system and a licensee cannot Chris@198: impose that choice. Chris@198: Chris@198: This section is intended to make thoroughly clear what is believed to Chris@198: be a consequence of the rest of this License. Chris@198: Chris@198: 8. If the distribution and/or use of the Program is restricted in Chris@198: certain countries either by patents or by copyrighted interfaces, the Chris@198: original copyright holder who places the Program under this License Chris@198: may add an explicit geographical distribution limitation excluding Chris@198: those countries, so that distribution is permitted only in or among Chris@198: countries not thus excluded. In such case, this License incorporates Chris@198: the limitation as if written in the body of this License. Chris@198: Chris@198: 9. The Free Software Foundation may publish revised and/or new versions Chris@198: of the General Public License from time to time. Such new versions will Chris@198: be similar in spirit to the present version, but may differ in detail to Chris@198: address new problems or concerns. Chris@198: Chris@198: Each version is given a distinguishing version number. If the Program Chris@198: specifies a version number of this License which applies to it and "any Chris@198: later version", you have the option of following the terms and conditions Chris@198: either of that version or of any later version published by the Free Chris@198: Software Foundation. If the Program does not specify a version number of Chris@198: this License, you may choose any version ever published by the Free Software Chris@198: Foundation. Chris@198: Chris@198: 10. If you wish to incorporate parts of the Program into other free Chris@198: programs whose distribution conditions are different, write to the author Chris@198: to ask for permission. For software which is copyrighted by the Free Chris@198: Software Foundation, write to the Free Software Foundation; we sometimes Chris@198: make exceptions for this. Our decision will be guided by the two goals Chris@198: of preserving the free status of all derivatives of our free software and Chris@198: of promoting the sharing and reuse of software generally. Chris@198: Chris@198: NO WARRANTY Chris@198: Chris@198: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY Chris@198: FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN Chris@198: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES Chris@198: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED Chris@198: OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF Chris@198: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS Chris@198: TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE Chris@198: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, Chris@198: REPAIR OR CORRECTION. Chris@198: Chris@198: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING Chris@198: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR Chris@198: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, Chris@198: INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING Chris@198: OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED Chris@198: TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY Chris@198: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER Chris@198: PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE Chris@198: POSSIBILITY OF SUCH DAMAGES. Chris@198: Chris@198: END OF TERMS AND CONDITIONS