rob@76: GNU GENERAL PUBLIC LICENSE rob@76: Version 2, June 1991 rob@76: rob@76: Copyright (C) 1989, 1991 Free Software Foundation, Inc. rob@76: 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA rob@76: Everyone is permitted to copy and distribute verbatim copies rob@76: of this license document, but changing it is not allowed. rob@76: rob@76: Preamble rob@76: rob@76: The licenses for most software are designed to take away your rob@76: freedom to share and change it. By contrast, the GNU General Public rob@76: License is intended to guarantee your freedom to share and change free rob@76: software--to make sure the software is free for all its users. This rob@76: General Public License applies to most of the Free Software rob@76: Foundation's software and to any other program whose authors commit to rob@76: using it. (Some other Free Software Foundation software is covered by rob@76: the GNU Library General Public License instead.) You can apply it to rob@76: your programs, too. rob@76: rob@76: When we speak of free software, we are referring to freedom, not rob@76: price. Our General Public Licenses are designed to make sure that you rob@76: have the freedom to distribute copies of free software (and charge for rob@76: this service if you wish), that you receive source code or can get it rob@76: if you want it, that you can change the software or use pieces of it rob@76: in new free programs; and that you know you can do these things. rob@76: rob@76: To protect your rights, we need to make restrictions that forbid rob@76: anyone to deny you these rights or to ask you to surrender the rights. rob@76: These restrictions translate to certain responsibilities for you if you rob@76: distribute copies of the software, or if you modify it. rob@76: rob@76: For example, if you distribute copies of such a program, whether rob@76: gratis or for a fee, you must give the recipients all the rights that rob@76: you have. You must make sure that they, too, receive or can get the rob@76: source code. And you must show them these terms so they know their rob@76: rights. rob@76: rob@76: We protect your rights with two steps: (1) copyright the software, and rob@76: (2) offer you this license which gives you legal permission to copy, rob@76: distribute and/or modify the software. rob@76: rob@76: Also, for each author's protection and ours, we want to make certain rob@76: that everyone understands that there is no warranty for this free rob@76: software. If the software is modified by someone else and passed on, we rob@76: want its recipients to know that what they have is not the original, so rob@76: that any problems introduced by others will not reflect on the original rob@76: authors' reputations. rob@76: rob@76: Finally, any free program is threatened constantly by software rob@76: patents. We wish to avoid the danger that redistributors of a free rob@76: program will individually obtain patent licenses, in effect making the rob@76: program proprietary. To prevent this, we have made it clear that any rob@76: patent must be licensed for everyone's free use or not licensed at all. rob@76: rob@76: The precise terms and conditions for copying, distribution and rob@76: modification follow. rob@76: rob@76: GNU GENERAL PUBLIC LICENSE rob@76: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION rob@76: rob@76: 0. This License applies to any program or other work which contains rob@76: a notice placed by the copyright holder saying it may be distributed rob@76: under the terms of this General Public License. The "Program", below, rob@76: refers to any such program or work, and a "work based on the Program" rob@76: means either the Program or any derivative work under copyright law: rob@76: that is to say, a work containing the Program or a portion of it, rob@76: either verbatim or with modifications and/or translated into another rob@76: language. (Hereinafter, translation is included without limitation in rob@76: the term "modification".) Each licensee is addressed as "you". rob@76: rob@76: Activities other than copying, distribution and modification are not rob@76: covered by this License; they are outside its scope. The act of rob@76: running the Program is not restricted, and the output from the Program rob@76: is covered only if its contents constitute a work based on the rob@76: Program (independent of having been made by running the Program). rob@76: Whether that is true depends on what the Program does. rob@76: rob@76: 1. You may copy and distribute verbatim copies of the Program's rob@76: source code as you receive it, in any medium, provided that you rob@76: conspicuously and appropriately publish on each copy an appropriate rob@76: copyright notice and disclaimer of warranty; keep intact all the rob@76: notices that refer to this License and to the absence of any warranty; rob@76: and give any other recipients of the Program a copy of this License rob@76: along with the Program. rob@76: rob@76: You may charge a fee for the physical act of transferring a copy, and rob@76: you may at your option offer warranty protection in exchange for a fee. rob@76: rob@76: 2. You may modify your copy or copies of the Program or any portion rob@76: of it, thus forming a work based on the Program, and copy and rob@76: distribute such modifications or work under the terms of Section 1 rob@76: above, provided that you also meet all of these conditions: rob@76: rob@76: a) You must cause the modified files to carry prominent notices rob@76: stating that you changed the files and the date of any change. rob@76: rob@76: b) You must cause any work that you distribute or publish, that in rob@76: whole or in part contains or is derived from the Program or any rob@76: part thereof, to be licensed as a whole at no charge to all third rob@76: parties under the terms of this License. rob@76: rob@76: c) If the modified program normally reads commands interactively rob@76: when run, you must cause it, when started running for such rob@76: interactive use in the most ordinary way, to print or display an rob@76: announcement including an appropriate copyright notice and a rob@76: notice that there is no warranty (or else, saying that you provide rob@76: a warranty) and that users may redistribute the program under rob@76: these conditions, and telling the user how to view a copy of this rob@76: License. (Exception: if the Program itself is interactive but rob@76: does not normally print such an announcement, your work based on rob@76: the Program is not required to print an announcement.) rob@76: rob@76: These requirements apply to the modified work as a whole. If rob@76: identifiable sections of that work are not derived from the Program, rob@76: and can be reasonably considered independent and separate works in rob@76: themselves, then this License, and its terms, do not apply to those rob@76: sections when you distribute them as separate works. But when you rob@76: distribute the same sections as part of a whole which is a work based rob@76: on the Program, the distribution of the whole must be on the terms of rob@76: this License, whose permissions for other licensees extend to the rob@76: entire whole, and thus to each and every part regardless of who wrote it. rob@76: rob@76: Thus, it is not the intent of this section to claim rights or contest rob@76: your rights to work written entirely by you; rather, the intent is to rob@76: exercise the right to control the distribution of derivative or rob@76: collective works based on the Program. rob@76: rob@76: In addition, mere aggregation of another work not based on the Program rob@76: with the Program (or with a work based on the Program) on a volume of rob@76: a storage or distribution medium does not bring the other work under rob@76: the scope of this License. rob@76: rob@76: 3. You may copy and distribute the Program (or a work based on it, rob@76: under Section 2) in object code or executable form under the terms of rob@76: Sections 1 and 2 above provided that you also do one of the following: rob@76: rob@76: a) Accompany it with the complete corresponding machine-readable rob@76: source code, which must be distributed under the terms of Sections rob@76: 1 and 2 above on a medium customarily used for software interchange; or, rob@76: rob@76: b) Accompany it with a written offer, valid for at least three rob@76: years, to give any third party, for a charge no more than your rob@76: cost of physically performing source distribution, a complete rob@76: machine-readable copy of the corresponding source code, to be rob@76: distributed under the terms of Sections 1 and 2 above on a medium rob@76: customarily used for software interchange; or, rob@76: rob@76: c) Accompany it with the information you received as to the offer rob@76: to distribute corresponding source code. (This alternative is rob@76: allowed only for noncommercial distribution and only if you rob@76: received the program in object code or executable form with such rob@76: an offer, in accord with Subsection b above.) rob@76: rob@76: The source code for a work means the preferred form of the work for rob@76: making modifications to it. For an executable work, complete source rob@76: code means all the source code for all modules it contains, plus any rob@76: associated interface definition files, plus the scripts used to rob@76: control compilation and installation of the executable. However, as a rob@76: special exception, the source code distributed need not include rob@76: anything that is normally distributed (in either source or binary rob@76: form) with the major components (compiler, kernel, and so on) of the rob@76: operating system on which the executable runs, unless that component rob@76: itself accompanies the executable. rob@76: rob@76: If distribution of executable or object code is made by offering rob@76: access to copy from a designated place, then offering equivalent rob@76: access to copy the source code from the same place counts as rob@76: distribution of the source code, even though third parties are not rob@76: compelled to copy the source along with the object code. rob@76: rob@76: 4. You may not copy, modify, sublicense, or distribute the Program rob@76: except as expressly provided under this License. Any attempt rob@76: otherwise to copy, modify, sublicense or distribute the Program is rob@76: void, and will automatically terminate your rights under this License. rob@76: However, parties who have received copies, or rights, from you under rob@76: this License will not have their licenses terminated so long as such rob@76: parties remain in full compliance. rob@76: rob@76: 5. You are not required to accept this License, since you have not rob@76: signed it. However, nothing else grants you permission to modify or rob@76: distribute the Program or its derivative works. These actions are rob@76: prohibited by law if you do not accept this License. Therefore, by rob@76: modifying or distributing the Program (or any work based on the rob@76: Program), you indicate your acceptance of this License to do so, and rob@76: all its terms and conditions for copying, distributing or modifying rob@76: the Program or works based on it. rob@76: rob@76: 6. Each time you redistribute the Program (or any work based on the rob@76: Program), the recipient automatically receives a license from the rob@76: original licensor to copy, distribute or modify the Program subject to rob@76: these terms and conditions. You may not impose any further rob@76: restrictions on the recipients' exercise of the rights granted herein. rob@76: You are not responsible for enforcing compliance by third parties to rob@76: this License. rob@76: rob@76: 7. If, as a consequence of a court judgment or allegation of patent rob@76: infringement or for any other reason (not limited to patent issues), rob@76: conditions are imposed on you (whether by court order, agreement or rob@76: otherwise) that contradict the conditions of this License, they do not rob@76: excuse you from the conditions of this License. If you cannot rob@76: distribute so as to satisfy simultaneously your obligations under this rob@76: License and any other pertinent obligations, then as a consequence you rob@76: may not distribute the Program at all. For example, if a patent rob@76: license would not permit royalty-free redistribution of the Program by rob@76: all those who receive copies directly or indirectly through you, then rob@76: the only way you could satisfy both it and this License would be to rob@76: refrain entirely from distribution of the Program. rob@76: rob@76: If any portion of this section is held invalid or unenforceable under rob@76: any particular circumstance, the balance of the section is intended to rob@76: apply and the section as a whole is intended to apply in other rob@76: circumstances. rob@76: rob@76: It is not the purpose of this section to induce you to infringe any rob@76: patents or other property right claims or to contest validity of any rob@76: such claims; this section has the sole purpose of protecting the rob@76: integrity of the free software distribution system, which is rob@76: implemented by public license practices. Many people have made rob@76: generous contributions to the wide range of software distributed rob@76: through that system in reliance on consistent application of that rob@76: system; it is up to the author/donor to decide if he or she is willing rob@76: to distribute software through any other system and a licensee cannot rob@76: impose that choice. rob@76: rob@76: This section is intended to make thoroughly clear what is believed to rob@76: be a consequence of the rest of this License. rob@76: rob@76: 8. If the distribution and/or use of the Program is restricted in rob@76: certain countries either by patents or by copyrighted interfaces, the rob@76: original copyright holder who places the Program under this License rob@76: may add an explicit geographical distribution limitation excluding rob@76: those countries, so that distribution is permitted only in or among rob@76: countries not thus excluded. In such case, this License incorporates rob@76: the limitation as if written in the body of this License. rob@76: rob@76: 9. The Free Software Foundation may publish revised and/or new versions rob@76: of the General Public License from time to time. Such new versions will rob@76: be similar in spirit to the present version, but may differ in detail to rob@76: address new problems or concerns. rob@76: rob@76: Each version is given a distinguishing version number. If the Program rob@76: specifies a version number of this License which applies to it and "any rob@76: later version", you have the option of following the terms and conditions rob@76: either of that version or of any later version published by the Free rob@76: Software Foundation. If the Program does not specify a version number of rob@76: this License, you may choose any version ever published by the Free Software rob@76: Foundation. rob@76: rob@76: 10. If you wish to incorporate parts of the Program into other free rob@76: programs whose distribution conditions are different, write to the author rob@76: to ask for permission. For software which is copyrighted by the Free rob@76: Software Foundation, write to the Free Software Foundation; we sometimes rob@76: make exceptions for this. Our decision will be guided by the two goals rob@76: of preserving the free status of all derivatives of our free software and rob@76: of promoting the sharing and reuse of software generally. rob@76: rob@76: NO WARRANTY rob@76: rob@76: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY rob@76: FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN rob@76: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES rob@76: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED rob@76: OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF rob@76: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS rob@76: TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE rob@76: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, rob@76: REPAIR OR CORRECTION. rob@76: rob@76: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING rob@76: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR rob@76: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, rob@76: INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING rob@76: OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED rob@76: TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY rob@76: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER rob@76: PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE rob@76: POSSIBILITY OF SUCH DAMAGES. rob@76: rob@76: END OF TERMS AND CONDITIONS rob@76: rob@76: How to Apply These Terms to Your New Programs rob@76: rob@76: If you develop a new program, and you want it to be of the greatest rob@76: possible use to the public, the best way to achieve this is to make it rob@76: free software which everyone can redistribute and change under these terms. rob@76: rob@76: To do so, attach the following notices to the program. It is safest rob@76: to attach them to the start of each source file to most effectively rob@76: convey the exclusion of warranty; and each file should have at least rob@76: the "copyright" line and a pointer to where the full notice is found. rob@76: rob@76: rob@76: Copyright (C) rob@76: rob@76: This program is free software; you can redistribute it and/or modify rob@76: it under the terms of the GNU General Public License as published by rob@76: the Free Software Foundation; either version 2 of the License, or rob@76: (at your option) any later version. rob@76: rob@76: This program is distributed in the hope that it will be useful, rob@76: but WITHOUT ANY WARRANTY; without even the implied warranty of rob@76: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the rob@76: GNU General Public License for more details. rob@76: rob@76: You should have received a copy of the GNU General Public License rob@76: along with this program; if not, write to the Free Software rob@76: Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA rob@76: rob@76: rob@76: Also add information on how to contact you by electronic and paper mail. rob@76: rob@76: If the program is interactive, make it output a short notice like this rob@76: when it starts in an interactive mode: rob@76: rob@76: Gnomovision version 69, Copyright (C) year name of author rob@76: Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. rob@76: This is free software, and you are welcome to redistribute it rob@76: under certain conditions; type `show c' for details. rob@76: rob@76: The hypothetical commands `show w' and `show c' should show the appropriate rob@76: parts of the General Public License. Of course, the commands you use may rob@76: be called something other than `show w' and `show c'; they could even be rob@76: mouse-clicks or menu items--whatever suits your program. rob@76: rob@76: You should also get your employer (if you work as a programmer) or your rob@76: school, if any, to sign a "copyright disclaimer" for the program, if rob@76: necessary. Here is a sample; alter the names: rob@76: rob@76: Yoyodyne, Inc., hereby disclaims all copyright interest in the program rob@76: `Gnomovision' (which makes passes at compilers) written by James Hacker. rob@76: rob@76: , 1 April 1989 rob@76: Ty Coon, President of Vice rob@76: rob@76: This General Public License does not permit incorporating your program into rob@76: proprietary programs. If your program is a subroutine library, you may rob@76: consider it more useful to permit linking proprietary applications with the rob@76: library. If this is what you want to do, use the GNU Library General rob@76: Public License instead of this License.