Chris@154: GNU GENERAL PUBLIC LICENSE Chris@154: Version 2, June 1991 Chris@154: Chris@154: Copyright (C) 1989, 1991 Free Software Foundation, Inc., Chris@154: 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Chris@154: Everyone is permitted to copy and distribute verbatim copies Chris@154: of this license document, but changing it is not allowed. Chris@154: Chris@154: Preamble Chris@154: Chris@154: The licenses for most software are designed to take away your Chris@154: freedom to share and change it. By contrast, the GNU General Public Chris@154: License is intended to guarantee your freedom to share and change free Chris@154: software--to make sure the software is free for all its users. This Chris@154: General Public License applies to most of the Free Software Chris@154: Foundation's software and to any other program whose authors commit to Chris@154: using it. (Some other Free Software Foundation software is covered by Chris@154: the GNU Lesser General Public License instead.) You can apply it to Chris@154: your programs, too. Chris@154: Chris@154: When we speak of free software, we are referring to freedom, not Chris@154: price. Our General Public Licenses are designed to make sure that you Chris@154: have the freedom to distribute copies of free software (and charge for Chris@154: this service if you wish), that you receive source code or can get it Chris@154: if you want it, that you can change the software or use pieces of it Chris@154: in new free programs; and that you know you can do these things. Chris@154: Chris@154: To protect your rights, we need to make restrictions that forbid Chris@154: anyone to deny you these rights or to ask you to surrender the rights. Chris@154: These restrictions translate to certain responsibilities for you if you Chris@154: distribute copies of the software, or if you modify it. Chris@154: Chris@154: For example, if you distribute copies of such a program, whether Chris@154: gratis or for a fee, you must give the recipients all the rights that Chris@154: you have. You must make sure that they, too, receive or can get the Chris@154: source code. And you must show them these terms so they know their Chris@154: rights. Chris@154: Chris@154: We protect your rights with two steps: (1) copyright the software, and Chris@154: (2) offer you this license which gives you legal permission to copy, Chris@154: distribute and/or modify the software. Chris@154: Chris@154: Also, for each author's protection and ours, we want to make certain Chris@154: that everyone understands that there is no warranty for this free Chris@154: software. If the software is modified by someone else and passed on, we Chris@154: want its recipients to know that what they have is not the original, so Chris@154: that any problems introduced by others will not reflect on the original Chris@154: authors' reputations. Chris@154: Chris@154: Finally, any free program is threatened constantly by software Chris@154: patents. We wish to avoid the danger that redistributors of a free Chris@154: program will individually obtain patent licenses, in effect making the Chris@154: program proprietary. To prevent this, we have made it clear that any Chris@154: patent must be licensed for everyone's free use or not licensed at all. Chris@154: Chris@154: The precise terms and conditions for copying, distribution and Chris@154: modification follow. Chris@154: Chris@154: GNU GENERAL PUBLIC LICENSE Chris@154: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION Chris@154: Chris@154: 0. This License applies to any program or other work which contains Chris@154: a notice placed by the copyright holder saying it may be distributed Chris@154: under the terms of this General Public License. The "Program", below, Chris@154: refers to any such program or work, and a "work based on the Program" Chris@154: means either the Program or any derivative work under copyright law: Chris@154: that is to say, a work containing the Program or a portion of it, Chris@154: either verbatim or with modifications and/or translated into another Chris@154: language. (Hereinafter, translation is included without limitation in Chris@154: the term "modification".) Each licensee is addressed as "you". Chris@154: Chris@154: Activities other than copying, distribution and modification are not Chris@154: covered by this License; they are outside its scope. The act of Chris@154: running the Program is not restricted, and the output from the Program Chris@154: is covered only if its contents constitute a work based on the Chris@154: Program (independent of having been made by running the Program). Chris@154: Whether that is true depends on what the Program does. Chris@154: Chris@154: 1. You may copy and distribute verbatim copies of the Program's Chris@154: source code as you receive it, in any medium, provided that you Chris@154: conspicuously and appropriately publish on each copy an appropriate Chris@154: copyright notice and disclaimer of warranty; keep intact all the Chris@154: notices that refer to this License and to the absence of any warranty; Chris@154: and give any other recipients of the Program a copy of this License Chris@154: along with the Program. Chris@154: Chris@154: You may charge a fee for the physical act of transferring a copy, and Chris@154: you may at your option offer warranty protection in exchange for a fee. Chris@154: Chris@154: 2. You may modify your copy or copies of the Program or any portion Chris@154: of it, thus forming a work based on the Program, and copy and Chris@154: distribute such modifications or work under the terms of Section 1 Chris@154: above, provided that you also meet all of these conditions: Chris@154: Chris@154: a) You must cause the modified files to carry prominent notices Chris@154: stating that you changed the files and the date of any change. Chris@154: Chris@154: b) You must cause any work that you distribute or publish, that in Chris@154: whole or in part contains or is derived from the Program or any Chris@154: part thereof, to be licensed as a whole at no charge to all third Chris@154: parties under the terms of this License. Chris@154: Chris@154: c) If the modified program normally reads commands interactively Chris@154: when run, you must cause it, when started running for such Chris@154: interactive use in the most ordinary way, to print or display an Chris@154: announcement including an appropriate copyright notice and a Chris@154: notice that there is no warranty (or else, saying that you provide Chris@154: a warranty) and that users may redistribute the program under Chris@154: these conditions, and telling the user how to view a copy of this Chris@154: License. (Exception: if the Program itself is interactive but Chris@154: does not normally print such an announcement, your work based on Chris@154: the Program is not required to print an announcement.) Chris@154: Chris@154: These requirements apply to the modified work as a whole. If Chris@154: identifiable sections of that work are not derived from the Program, Chris@154: and can be reasonably considered independent and separate works in Chris@154: themselves, then this License, and its terms, do not apply to those Chris@154: sections when you distribute them as separate works. But when you Chris@154: distribute the same sections as part of a whole which is a work based Chris@154: on the Program, the distribution of the whole must be on the terms of Chris@154: this License, whose permissions for other licensees extend to the Chris@154: entire whole, and thus to each and every part regardless of who wrote it. Chris@154: Chris@154: Thus, it is not the intent of this section to claim rights or contest Chris@154: your rights to work written entirely by you; rather, the intent is to Chris@154: exercise the right to control the distribution of derivative or Chris@154: collective works based on the Program. Chris@154: Chris@154: In addition, mere aggregation of another work not based on the Program Chris@154: with the Program (or with a work based on the Program) on a volume of Chris@154: a storage or distribution medium does not bring the other work under Chris@154: the scope of this License. Chris@154: Chris@154: 3. You may copy and distribute the Program (or a work based on it, Chris@154: under Section 2) in object code or executable form under the terms of Chris@154: Sections 1 and 2 above provided that you also do one of the following: Chris@154: Chris@154: a) Accompany it with the complete corresponding machine-readable Chris@154: source code, which must be distributed under the terms of Sections Chris@154: 1 and 2 above on a medium customarily used for software interchange; or, Chris@154: Chris@154: b) Accompany it with a written offer, valid for at least three Chris@154: years, to give any third party, for a charge no more than your Chris@154: cost of physically performing source distribution, a complete Chris@154: machine-readable copy of the corresponding source code, to be Chris@154: distributed under the terms of Sections 1 and 2 above on a medium Chris@154: customarily used for software interchange; or, Chris@154: Chris@154: c) Accompany it with the information you received as to the offer Chris@154: to distribute corresponding source code. (This alternative is Chris@154: allowed only for noncommercial distribution and only if you Chris@154: received the program in object code or executable form with such Chris@154: an offer, in accord with Subsection b above.) Chris@154: Chris@154: The source code for a work means the preferred form of the work for Chris@154: making modifications to it. For an executable work, complete source Chris@154: code means all the source code for all modules it contains, plus any Chris@154: associated interface definition files, plus the scripts used to Chris@154: control compilation and installation of the executable. However, as a Chris@154: special exception, the source code distributed need not include Chris@154: anything that is normally distributed (in either source or binary Chris@154: form) with the major components (compiler, kernel, and so on) of the Chris@154: operating system on which the executable runs, unless that component Chris@154: itself accompanies the executable. Chris@154: Chris@154: If distribution of executable or object code is made by offering Chris@154: access to copy from a designated place, then offering equivalent Chris@154: access to copy the source code from the same place counts as Chris@154: distribution of the source code, even though third parties are not Chris@154: compelled to copy the source along with the object code. Chris@154: Chris@154: 4. You may not copy, modify, sublicense, or distribute the Program Chris@154: except as expressly provided under this License. Any attempt Chris@154: otherwise to copy, modify, sublicense or distribute the Program is Chris@154: void, and will automatically terminate your rights under this License. Chris@154: However, parties who have received copies, or rights, from you under Chris@154: this License will not have their licenses terminated so long as such Chris@154: parties remain in full compliance. Chris@154: Chris@154: 5. You are not required to accept this License, since you have not Chris@154: signed it. However, nothing else grants you permission to modify or Chris@154: distribute the Program or its derivative works. These actions are Chris@154: prohibited by law if you do not accept this License. Therefore, by Chris@154: modifying or distributing the Program (or any work based on the Chris@154: Program), you indicate your acceptance of this License to do so, and Chris@154: all its terms and conditions for copying, distributing or modifying Chris@154: the Program or works based on it. Chris@154: Chris@154: 6. Each time you redistribute the Program (or any work based on the Chris@154: Program), the recipient automatically receives a license from the Chris@154: original licensor to copy, distribute or modify the Program subject to Chris@154: these terms and conditions. You may not impose any further Chris@154: restrictions on the recipients' exercise of the rights granted herein. Chris@154: You are not responsible for enforcing compliance by third parties to Chris@154: this License. Chris@154: Chris@154: 7. If, as a consequence of a court judgment or allegation of patent Chris@154: infringement or for any other reason (not limited to patent issues), Chris@154: conditions are imposed on you (whether by court order, agreement or Chris@154: otherwise) that contradict the conditions of this License, they do not Chris@154: excuse you from the conditions of this License. If you cannot Chris@154: distribute so as to satisfy simultaneously your obligations under this Chris@154: License and any other pertinent obligations, then as a consequence you Chris@154: may not distribute the Program at all. For example, if a patent Chris@154: license would not permit royalty-free redistribution of the Program by Chris@154: all those who receive copies directly or indirectly through you, then Chris@154: the only way you could satisfy both it and this License would be to Chris@154: refrain entirely from distribution of the Program. Chris@154: Chris@154: If any portion of this section is held invalid or unenforceable under Chris@154: any particular circumstance, the balance of the section is intended to Chris@154: apply and the section as a whole is intended to apply in other Chris@154: circumstances. Chris@154: Chris@154: It is not the purpose of this section to induce you to infringe any Chris@154: patents or other property right claims or to contest validity of any Chris@154: such claims; this section has the sole purpose of protecting the Chris@154: integrity of the free software distribution system, which is Chris@154: implemented by public license practices. Many people have made Chris@154: generous contributions to the wide range of software distributed Chris@154: through that system in reliance on consistent application of that Chris@154: system; it is up to the author/donor to decide if he or she is willing Chris@154: to distribute software through any other system and a licensee cannot Chris@154: impose that choice. Chris@154: Chris@154: This section is intended to make thoroughly clear what is believed to Chris@154: be a consequence of the rest of this License. Chris@154: Chris@154: 8. If the distribution and/or use of the Program is restricted in Chris@154: certain countries either by patents or by copyrighted interfaces, the Chris@154: original copyright holder who places the Program under this License Chris@154: may add an explicit geographical distribution limitation excluding Chris@154: those countries, so that distribution is permitted only in or among Chris@154: countries not thus excluded. In such case, this License incorporates Chris@154: the limitation as if written in the body of this License. Chris@154: Chris@154: 9. The Free Software Foundation may publish revised and/or new versions Chris@154: of the General Public License from time to time. Such new versions will Chris@154: be similar in spirit to the present version, but may differ in detail to Chris@154: address new problems or concerns. Chris@154: Chris@154: Each version is given a distinguishing version number. If the Program Chris@154: specifies a version number of this License which applies to it and "any Chris@154: later version", you have the option of following the terms and conditions Chris@154: either of that version or of any later version published by the Free Chris@154: Software Foundation. If the Program does not specify a version number of Chris@154: this License, you may choose any version ever published by the Free Software Chris@154: Foundation. Chris@154: Chris@154: 10. If you wish to incorporate parts of the Program into other free Chris@154: programs whose distribution conditions are different, write to the author Chris@154: to ask for permission. For software which is copyrighted by the Free Chris@154: Software Foundation, write to the Free Software Foundation; we sometimes Chris@154: make exceptions for this. Our decision will be guided by the two goals Chris@154: of preserving the free status of all derivatives of our free software and Chris@154: of promoting the sharing and reuse of software generally. Chris@154: Chris@154: NO WARRANTY Chris@154: Chris@154: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY Chris@154: FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN Chris@154: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES Chris@154: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED Chris@154: OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF Chris@154: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS Chris@154: TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE Chris@154: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, Chris@154: REPAIR OR CORRECTION. Chris@154: Chris@154: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING Chris@154: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR Chris@154: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, Chris@154: INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING Chris@154: OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED Chris@154: TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY Chris@154: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER Chris@154: PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE Chris@154: POSSIBILITY OF SUCH DAMAGES. Chris@154: Chris@154: END OF TERMS AND CONDITIONS Chris@154: Chris@154: How to Apply These Terms to Your New Programs Chris@154: Chris@154: If you develop a new program, and you want it to be of the greatest Chris@154: possible use to the public, the best way to achieve this is to make it Chris@154: free software which everyone can redistribute and change under these terms. Chris@154: Chris@154: To do so, attach the following notices to the program. It is safest Chris@154: to attach them to the start of each source file to most effectively Chris@154: convey the exclusion of warranty; and each file should have at least Chris@154: the "copyright" line and a pointer to where the full notice is found. Chris@154: Chris@154: Chris@154: Copyright (C) Chris@154: Chris@154: This program is free software; you can redistribute it and/or modify Chris@154: it under the terms of the GNU General Public License as published by Chris@154: the Free Software Foundation; either version 2 of the License, or Chris@154: (at your option) any later version. Chris@154: Chris@154: This program is distributed in the hope that it will be useful, Chris@154: but WITHOUT ANY WARRANTY; without even the implied warranty of Chris@154: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Chris@154: GNU General Public License for more details. Chris@154: Chris@154: You should have received a copy of the GNU General Public License along Chris@154: with this program; if not, write to the Free Software Foundation, Inc., Chris@154: 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Chris@154: Chris@154: Also add information on how to contact you by electronic and paper mail. Chris@154: Chris@154: If the program is interactive, make it output a short notice like this Chris@154: when it starts in an interactive mode: Chris@154: Chris@154: Gnomovision version 69, Copyright (C) year name of author Chris@154: Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. Chris@154: This is free software, and you are welcome to redistribute it Chris@154: under certain conditions; type `show c' for details. Chris@154: Chris@154: The hypothetical commands `show w' and `show c' should show the appropriate Chris@154: parts of the General Public License. Of course, the commands you use may Chris@154: be called something other than `show w' and `show c'; they could even be Chris@154: mouse-clicks or menu items--whatever suits your program. Chris@154: Chris@154: You should also get your employer (if you work as a programmer) or your Chris@154: school, if any, to sign a "copyright disclaimer" for the program, if Chris@154: necessary. Here is a sample; alter the names: Chris@154: Chris@154: Yoyodyne, Inc., hereby disclaims all copyright interest in the program Chris@154: `Gnomovision' (which makes passes at compilers) written by James Hacker. Chris@154: Chris@154: , 1 April 1989 Chris@154: Ty Coon, President of Vice Chris@154: Chris@154: This General Public License does not permit incorporating your program into Chris@154: proprietary programs. If your program is a subroutine library, you may Chris@154: consider it more useful to permit linking proprietary applications with the Chris@154: library. If this is what you want to do, use the GNU Lesser General Chris@154: Public License instead of this License.