Chris@19: GNU GENERAL PUBLIC LICENSE Chris@19: Version 2, June 1991 Chris@19: Chris@19: Copyright (C) 1989, 1991 Free Software Foundation, Inc. Chris@19: 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Chris@19: Everyone is permitted to copy and distribute verbatim copies Chris@19: of this license document, but changing it is not allowed. Chris@19: Chris@19: Preamble Chris@19: Chris@19: The licenses for most software are designed to take away your Chris@19: freedom to share and change it. By contrast, the GNU General Public Chris@19: License is intended to guarantee your freedom to share and change free Chris@19: software--to make sure the software is free for all its users. This Chris@19: General Public License applies to most of the Free Software Chris@19: Foundation's software and to any other program whose authors commit to Chris@19: using it. (Some other Free Software Foundation software is covered by Chris@19: the GNU Library General Public License instead.) You can apply it to Chris@19: your programs, too. Chris@19: Chris@19: When we speak of free software, we are referring to freedom, not Chris@19: price. Our General Public Licenses are designed to make sure that you Chris@19: have the freedom to distribute copies of free software (and charge for Chris@19: this service if you wish), that you receive source code or can get it Chris@19: if you want it, that you can change the software or use pieces of it Chris@19: in new free programs; and that you know you can do these things. Chris@19: Chris@19: To protect your rights, we need to make restrictions that forbid Chris@19: anyone to deny you these rights or to ask you to surrender the rights. Chris@19: These restrictions translate to certain responsibilities for you if you Chris@19: distribute copies of the software, or if you modify it. Chris@19: Chris@19: For example, if you distribute copies of such a program, whether Chris@19: gratis or for a fee, you must give the recipients all the rights that Chris@19: you have. You must make sure that they, too, receive or can get the Chris@19: source code. And you must show them these terms so they know their Chris@19: rights. Chris@19: Chris@19: We protect your rights with two steps: (1) copyright the software, and Chris@19: (2) offer you this license which gives you legal permission to copy, Chris@19: distribute and/or modify the software. Chris@19: Chris@19: Also, for each author's protection and ours, we want to make certain Chris@19: that everyone understands that there is no warranty for this free Chris@19: software. If the software is modified by someone else and passed on, we Chris@19: want its recipients to know that what they have is not the original, so Chris@19: that any problems introduced by others will not reflect on the original Chris@19: authors' reputations. Chris@19: Chris@19: Finally, any free program is threatened constantly by software Chris@19: patents. We wish to avoid the danger that redistributors of a free Chris@19: program will individually obtain patent licenses, in effect making the Chris@19: program proprietary. To prevent this, we have made it clear that any Chris@19: patent must be licensed for everyone's free use or not licensed at all. Chris@19: Chris@19: The precise terms and conditions for copying, distribution and Chris@19: modification follow. Chris@19: Chris@19: GNU GENERAL PUBLIC LICENSE Chris@19: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION Chris@19: Chris@19: 0. This License applies to any program or other work which contains Chris@19: a notice placed by the copyright holder saying it may be distributed Chris@19: under the terms of this General Public License. The "Program", below, Chris@19: refers to any such program or work, and a "work based on the Program" Chris@19: means either the Program or any derivative work under copyright law: Chris@19: that is to say, a work containing the Program or a portion of it, Chris@19: either verbatim or with modifications and/or translated into another Chris@19: language. (Hereinafter, translation is included without limitation in Chris@19: the term "modification".) Each licensee is addressed as "you". Chris@19: Chris@19: Activities other than copying, distribution and modification are not Chris@19: covered by this License; they are outside its scope. The act of Chris@19: running the Program is not restricted, and the output from the Program Chris@19: is covered only if its contents constitute a work based on the Chris@19: Program (independent of having been made by running the Program). Chris@19: Whether that is true depends on what the Program does. Chris@19: Chris@19: 1. You may copy and distribute verbatim copies of the Program's Chris@19: source code as you receive it, in any medium, provided that you Chris@19: conspicuously and appropriately publish on each copy an appropriate Chris@19: copyright notice and disclaimer of warranty; keep intact all the Chris@19: notices that refer to this License and to the absence of any warranty; Chris@19: and give any other recipients of the Program a copy of this License Chris@19: along with the Program. Chris@19: Chris@19: You may charge a fee for the physical act of transferring a copy, and Chris@19: you may at your option offer warranty protection in exchange for a fee. Chris@19: Chris@19: 2. You may modify your copy or copies of the Program or any portion Chris@19: of it, thus forming a work based on the Program, and copy and Chris@19: distribute such modifications or work under the terms of Section 1 Chris@19: above, provided that you also meet all of these conditions: Chris@19: Chris@19: a) You must cause the modified files to carry prominent notices Chris@19: stating that you changed the files and the date of any change. Chris@19: Chris@19: b) You must cause any work that you distribute or publish, that in Chris@19: whole or in part contains or is derived from the Program or any Chris@19: part thereof, to be licensed as a whole at no charge to all third Chris@19: parties under the terms of this License. Chris@19: Chris@19: c) If the modified program normally reads commands interactively Chris@19: when run, you must cause it, when started running for such Chris@19: interactive use in the most ordinary way, to print or display an Chris@19: announcement including an appropriate copyright notice and a Chris@19: notice that there is no warranty (or else, saying that you provide Chris@19: a warranty) and that users may redistribute the program under Chris@19: these conditions, and telling the user how to view a copy of this Chris@19: License. (Exception: if the Program itself is interactive but Chris@19: does not normally print such an announcement, your work based on Chris@19: the Program is not required to print an announcement.) Chris@19: Chris@19: These requirements apply to the modified work as a whole. If Chris@19: identifiable sections of that work are not derived from the Program, Chris@19: and can be reasonably considered independent and separate works in Chris@19: themselves, then this License, and its terms, do not apply to those Chris@19: sections when you distribute them as separate works. But when you Chris@19: distribute the same sections as part of a whole which is a work based Chris@19: on the Program, the distribution of the whole must be on the terms of Chris@19: this License, whose permissions for other licensees extend to the Chris@19: entire whole, and thus to each and every part regardless of who wrote it. Chris@19: Chris@19: Thus, it is not the intent of this section to claim rights or contest Chris@19: your rights to work written entirely by you; rather, the intent is to Chris@19: exercise the right to control the distribution of derivative or Chris@19: collective works based on the Program. Chris@19: Chris@19: In addition, mere aggregation of another work not based on the Program Chris@19: with the Program (or with a work based on the Program) on a volume of Chris@19: a storage or distribution medium does not bring the other work under Chris@19: the scope of this License. Chris@19: Chris@19: 3. You may copy and distribute the Program (or a work based on it, Chris@19: under Section 2) in object code or executable form under the terms of Chris@19: Sections 1 and 2 above provided that you also do one of the following: Chris@19: Chris@19: a) Accompany it with the complete corresponding machine-readable Chris@19: source code, which must be distributed under the terms of Sections Chris@19: 1 and 2 above on a medium customarily used for software interchange; or, Chris@19: Chris@19: b) Accompany it with a written offer, valid for at least three Chris@19: years, to give any third party, for a charge no more than your Chris@19: cost of physically performing source distribution, a complete Chris@19: machine-readable copy of the corresponding source code, to be Chris@19: distributed under the terms of Sections 1 and 2 above on a medium Chris@19: customarily used for software interchange; or, Chris@19: Chris@19: c) Accompany it with the information you received as to the offer Chris@19: to distribute corresponding source code. (This alternative is Chris@19: allowed only for noncommercial distribution and only if you Chris@19: received the program in object code or executable form with such Chris@19: an offer, in accord with Subsection b above.) Chris@19: Chris@19: The source code for a work means the preferred form of the work for Chris@19: making modifications to it. For an executable work, complete source Chris@19: code means all the source code for all modules it contains, plus any Chris@19: associated interface definition files, plus the scripts used to Chris@19: control compilation and installation of the executable. However, as a Chris@19: special exception, the source code distributed need not include Chris@19: anything that is normally distributed (in either source or binary Chris@19: form) with the major components (compiler, kernel, and so on) of the Chris@19: operating system on which the executable runs, unless that component Chris@19: itself accompanies the executable. Chris@19: Chris@19: If distribution of executable or object code is made by offering Chris@19: access to copy from a designated place, then offering equivalent Chris@19: access to copy the source code from the same place counts as Chris@19: distribution of the source code, even though third parties are not Chris@19: compelled to copy the source along with the object code. Chris@19: Chris@19: 4. You may not copy, modify, sublicense, or distribute the Program Chris@19: except as expressly provided under this License. Any attempt Chris@19: otherwise to copy, modify, sublicense or distribute the Program is Chris@19: void, and will automatically terminate your rights under this License. Chris@19: However, parties who have received copies, or rights, from you under Chris@19: this License will not have their licenses terminated so long as such Chris@19: parties remain in full compliance. Chris@19: Chris@19: 5. You are not required to accept this License, since you have not Chris@19: signed it. However, nothing else grants you permission to modify or Chris@19: distribute the Program or its derivative works. These actions are Chris@19: prohibited by law if you do not accept this License. Therefore, by Chris@19: modifying or distributing the Program (or any work based on the Chris@19: Program), you indicate your acceptance of this License to do so, and Chris@19: all its terms and conditions for copying, distributing or modifying Chris@19: the Program or works based on it. Chris@19: Chris@19: 6. Each time you redistribute the Program (or any work based on the Chris@19: Program), the recipient automatically receives a license from the Chris@19: original licensor to copy, distribute or modify the Program subject to Chris@19: these terms and conditions. You may not impose any further Chris@19: restrictions on the recipients' exercise of the rights granted herein. Chris@19: You are not responsible for enforcing compliance by third parties to Chris@19: this License. Chris@19: Chris@19: 7. If, as a consequence of a court judgment or allegation of patent Chris@19: infringement or for any other reason (not limited to patent issues), Chris@19: conditions are imposed on you (whether by court order, agreement or Chris@19: otherwise) that contradict the conditions of this License, they do not Chris@19: excuse you from the conditions of this License. If you cannot Chris@19: distribute so as to satisfy simultaneously your obligations under this Chris@19: License and any other pertinent obligations, then as a consequence you Chris@19: may not distribute the Program at all. For example, if a patent Chris@19: license would not permit royalty-free redistribution of the Program by Chris@19: all those who receive copies directly or indirectly through you, then Chris@19: the only way you could satisfy both it and this License would be to Chris@19: refrain entirely from distribution of the Program. Chris@19: Chris@19: If any portion of this section is held invalid or unenforceable under Chris@19: any particular circumstance, the balance of the section is intended to Chris@19: apply and the section as a whole is intended to apply in other Chris@19: circumstances. Chris@19: Chris@19: It is not the purpose of this section to induce you to infringe any Chris@19: patents or other property right claims or to contest validity of any Chris@19: such claims; this section has the sole purpose of protecting the Chris@19: integrity of the free software distribution system, which is Chris@19: implemented by public license practices. Many people have made Chris@19: generous contributions to the wide range of software distributed Chris@19: through that system in reliance on consistent application of that Chris@19: system; it is up to the author/donor to decide if he or she is willing Chris@19: to distribute software through any other system and a licensee cannot Chris@19: impose that choice. Chris@19: Chris@19: This section is intended to make thoroughly clear what is believed to Chris@19: be a consequence of the rest of this License. Chris@19: Chris@19: 8. If the distribution and/or use of the Program is restricted in Chris@19: certain countries either by patents or by copyrighted interfaces, the Chris@19: original copyright holder who places the Program under this License Chris@19: may add an explicit geographical distribution limitation excluding Chris@19: those countries, so that distribution is permitted only in or among Chris@19: countries not thus excluded. In such case, this License incorporates Chris@19: the limitation as if written in the body of this License. Chris@19: Chris@19: 9. The Free Software Foundation may publish revised and/or new versions Chris@19: of the General Public License from time to time. Such new versions will Chris@19: be similar in spirit to the present version, but may differ in detail to Chris@19: address new problems or concerns. Chris@19: Chris@19: Each version is given a distinguishing version number. If the Program Chris@19: specifies a version number of this License which applies to it and "any Chris@19: later version", you have the option of following the terms and conditions Chris@19: either of that version or of any later version published by the Free Chris@19: Software Foundation. If the Program does not specify a version number of Chris@19: this License, you may choose any version ever published by the Free Software Chris@19: Foundation. Chris@19: Chris@19: 10. If you wish to incorporate parts of the Program into other free Chris@19: programs whose distribution conditions are different, write to the author Chris@19: to ask for permission. For software which is copyrighted by the Free Chris@19: Software Foundation, write to the Free Software Foundation; we sometimes Chris@19: make exceptions for this. Our decision will be guided by the two goals Chris@19: of preserving the free status of all derivatives of our free software and Chris@19: of promoting the sharing and reuse of software generally. Chris@19: Chris@19: NO WARRANTY Chris@19: Chris@19: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY Chris@19: FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN Chris@19: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES Chris@19: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED Chris@19: OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF Chris@19: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS Chris@19: TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE Chris@19: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, Chris@19: REPAIR OR CORRECTION. Chris@19: Chris@19: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING Chris@19: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR Chris@19: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, Chris@19: INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING Chris@19: OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED Chris@19: TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY Chris@19: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER Chris@19: PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE Chris@19: POSSIBILITY OF SUCH DAMAGES. Chris@19: Chris@19: END OF TERMS AND CONDITIONS Chris@19: Chris@19: How to Apply These Terms to Your New Programs Chris@19: Chris@19: If you develop a new program, and you want it to be of the greatest Chris@19: possible use to the public, the best way to achieve this is to make it Chris@19: free software which everyone can redistribute and change under these terms. Chris@19: Chris@19: To do so, attach the following notices to the program. It is safest Chris@19: to attach them to the start of each source file to most effectively Chris@19: convey the exclusion of warranty; and each file should have at least Chris@19: the "copyright" line and a pointer to where the full notice is found. Chris@19: Chris@19: Chris@19: Copyright (C) Chris@19: Chris@19: This program is free software; you can redistribute it and/or modify Chris@19: it under the terms of the GNU General Public License as published by Chris@19: the Free Software Foundation; either version 2 of the License, or Chris@19: (at your option) any later version. Chris@19: Chris@19: This program is distributed in the hope that it will be useful, Chris@19: but WITHOUT ANY WARRANTY; without even the implied warranty of Chris@19: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Chris@19: GNU General Public License for more details. Chris@19: Chris@19: You should have received a copy of the GNU General Public License Chris@19: along with this program; if not, write to the Free Software Chris@19: Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Chris@19: Chris@19: Chris@19: Also add information on how to contact you by electronic and paper mail. Chris@19: Chris@19: If the program is interactive, make it output a short notice like this Chris@19: when it starts in an interactive mode: Chris@19: Chris@19: Gnomovision version 69, Copyright (C) year name of author Chris@19: Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. Chris@19: This is free software, and you are welcome to redistribute it Chris@19: under certain conditions; type `show c' for details. Chris@19: Chris@19: The hypothetical commands `show w' and `show c' should show the appropriate Chris@19: parts of the General Public License. Of course, the commands you use may Chris@19: be called something other than `show w' and `show c'; they could even be Chris@19: mouse-clicks or menu items--whatever suits your program. Chris@19: Chris@19: You should also get your employer (if you work as a programmer) or your Chris@19: school, if any, to sign a "copyright disclaimer" for the program, if Chris@19: necessary. Here is a sample; alter the names: Chris@19: Chris@19: Yoyodyne, Inc., hereby disclaims all copyright interest in the program Chris@19: `Gnomovision' (which makes passes at compilers) written by James Hacker. Chris@19: Chris@19: , 1 April 1989 Chris@19: Ty Coon, President of Vice Chris@19: Chris@19: This General Public License does not permit incorporating your program into Chris@19: proprietary programs. If your program is a subroutine library, you may Chris@19: consider it more useful to permit linking proprietary applications with the Chris@19: library. If this is what you want to do, use the GNU Library General Chris@19: Public License instead of this License.