paulo@0: GNU GENERAL PUBLIC LICENSE paulo@0: Version 2, June 1991 paulo@0: paulo@0: Copyright (C) 1989, 1991 Free Software Foundation, Inc. paulo@0: 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA paulo@0: Everyone is permitted to copy and distribute verbatim copies paulo@0: of this license document, but changing it is not allowed. paulo@0: paulo@0: Preamble paulo@0: paulo@0: The licenses for most software are designed to take away your paulo@0: freedom to share and change it. By contrast, the GNU General Public paulo@0: License is intended to guarantee your freedom to share and change free paulo@0: software--to make sure the software is free for all its users. This paulo@0: General Public License applies to most of the Free Software paulo@0: Foundation's software and to any other program whose authors commit to paulo@0: using it. (Some other Free Software Foundation software is covered by paulo@0: the GNU Library General Public License instead.) You can apply it to paulo@0: your programs, too. paulo@0: paulo@0: When we speak of free software, we are referring to freedom, not paulo@0: price. Our General Public Licenses are designed to make sure that you paulo@0: have the freedom to distribute copies of free software (and charge for paulo@0: this service if you wish), that you receive source code or can get it paulo@0: if you want it, that you can change the software or use pieces of it paulo@0: in new free programs; and that you know you can do these things. paulo@0: paulo@0: To protect your rights, we need to make restrictions that forbid paulo@0: anyone to deny you these rights or to ask you to surrender the rights. paulo@0: These restrictions translate to certain responsibilities for you if you paulo@0: distribute copies of the software, or if you modify it. paulo@0: paulo@0: For example, if you distribute copies of such a program, whether paulo@0: gratis or for a fee, you must give the recipients all the rights that paulo@0: you have. You must make sure that they, too, receive or can get the paulo@0: source code. And you must show them these terms so they know their paulo@0: rights. paulo@0: paulo@0: We protect your rights with two steps: (1) copyright the software, and paulo@0: (2) offer you this license which gives you legal permission to copy, paulo@0: distribute and/or modify the software. paulo@0: paulo@0: Also, for each author's protection and ours, we want to make certain paulo@0: that everyone understands that there is no warranty for this free paulo@0: software. If the software is modified by someone else and passed on, we paulo@0: want its recipients to know that what they have is not the original, so paulo@0: that any problems introduced by others will not reflect on the original paulo@0: authors' reputations. paulo@0: paulo@0: Finally, any free program is threatened constantly by software paulo@0: patents. We wish to avoid the danger that redistributors of a free paulo@0: program will individually obtain patent licenses, in effect making the paulo@0: program proprietary. To prevent this, we have made it clear that any paulo@0: patent must be licensed for everyone's free use or not licensed at all. paulo@0: paulo@0: The precise terms and conditions for copying, distribution and paulo@0: modification follow. paulo@0: paulo@0: GNU GENERAL PUBLIC LICENSE paulo@0: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION paulo@0: paulo@0: 0. This License applies to any program or other work which contains paulo@0: a notice placed by the copyright holder saying it may be distributed paulo@0: under the terms of this General Public License. The "Program", below, paulo@0: refers to any such program or work, and a "work based on the Program" paulo@0: means either the Program or any derivative work under copyright law: paulo@0: that is to say, a work containing the Program or a portion of it, paulo@0: either verbatim or with modifications and/or translated into another paulo@0: language. (Hereinafter, translation is included without limitation in paulo@0: the term "modification".) Each licensee is addressed as "you". paulo@0: paulo@0: Activities other than copying, distribution and modification are not paulo@0: covered by this License; they are outside its scope. The act of paulo@0: running the Program is not restricted, and the output from the Program paulo@0: is covered only if its contents constitute a work based on the paulo@0: Program (independent of having been made by running the Program). paulo@0: Whether that is true depends on what the Program does. paulo@0: paulo@0: 1. You may copy and distribute verbatim copies of the Program's paulo@0: source code as you receive it, in any medium, provided that you paulo@0: conspicuously and appropriately publish on each copy an appropriate paulo@0: copyright notice and disclaimer of warranty; keep intact all the paulo@0: notices that refer to this License and to the absence of any warranty; paulo@0: and give any other recipients of the Program a copy of this License paulo@0: along with the Program. paulo@0: paulo@0: You may charge a fee for the physical act of transferring a copy, and paulo@0: you may at your option offer warranty protection in exchange for a fee. paulo@0: paulo@0: 2. You may modify your copy or copies of the Program or any portion paulo@0: of it, thus forming a work based on the Program, and copy and paulo@0: distribute such modifications or work under the terms of Section 1 paulo@0: above, provided that you also meet all of these conditions: paulo@0: paulo@0: a) You must cause the modified files to carry prominent notices paulo@0: stating that you changed the files and the date of any change. paulo@0: paulo@0: b) You must cause any work that you distribute or publish, that in paulo@0: whole or in part contains or is derived from the Program or any paulo@0: part thereof, to be licensed as a whole at no charge to all third paulo@0: parties under the terms of this License. paulo@0: paulo@0: c) If the modified program normally reads commands interactively paulo@0: when run, you must cause it, when started running for such paulo@0: interactive use in the most ordinary way, to print or display an paulo@0: announcement including an appropriate copyright notice and a paulo@0: notice that there is no warranty (or else, saying that you provide paulo@0: a warranty) and that users may redistribute the program under paulo@0: these conditions, and telling the user how to view a copy of this paulo@0: License. (Exception: if the Program itself is interactive but paulo@0: does not normally print such an announcement, your work based on paulo@0: the Program is not required to print an announcement.) paulo@0: paulo@0: These requirements apply to the modified work as a whole. If paulo@0: identifiable sections of that work are not derived from the Program, paulo@0: and can be reasonably considered independent and separate works in paulo@0: themselves, then this License, and its terms, do not apply to those paulo@0: sections when you distribute them as separate works. But when you paulo@0: distribute the same sections as part of a whole which is a work based paulo@0: on the Program, the distribution of the whole must be on the terms of paulo@0: this License, whose permissions for other licensees extend to the paulo@0: entire whole, and thus to each and every part regardless of who wrote it. paulo@0: paulo@0: Thus, it is not the intent of this section to claim rights or contest paulo@0: your rights to work written entirely by you; rather, the intent is to paulo@0: exercise the right to control the distribution of derivative or paulo@0: collective works based on the Program. paulo@0: paulo@0: In addition, mere aggregation of another work not based on the Program paulo@0: with the Program (or with a work based on the Program) on a volume of paulo@0: a storage or distribution medium does not bring the other work under paulo@0: the scope of this License. paulo@0: paulo@0: 3. You may copy and distribute the Program (or a work based on it, paulo@0: under Section 2) in object code or executable form under the terms of paulo@0: Sections 1 and 2 above provided that you also do one of the following: paulo@0: paulo@0: a) Accompany it with the complete corresponding machine-readable paulo@0: source code, which must be distributed under the terms of Sections paulo@0: 1 and 2 above on a medium customarily used for software interchange; or, paulo@0: paulo@0: b) Accompany it with a written offer, valid for at least three paulo@0: years, to give any third party, for a charge no more than your paulo@0: cost of physically performing source distribution, a complete paulo@0: machine-readable copy of the corresponding source code, to be paulo@0: distributed under the terms of Sections 1 and 2 above on a medium paulo@0: customarily used for software interchange; or, paulo@0: paulo@0: c) Accompany it with the information you received as to the offer paulo@0: to distribute corresponding source code. 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Any attempt paulo@0: otherwise to copy, modify, sublicense or distribute the Program is paulo@0: void, and will automatically terminate your rights under this License. paulo@0: However, parties who have received copies, or rights, from you under paulo@0: this License will not have their licenses terminated so long as such paulo@0: parties remain in full compliance. paulo@0: paulo@0: 5. You are not required to accept this License, since you have not paulo@0: signed it. However, nothing else grants you permission to modify or paulo@0: distribute the Program or its derivative works. These actions are paulo@0: prohibited by law if you do not accept this License. Therefore, by paulo@0: modifying or distributing the Program (or any work based on the paulo@0: Program), you indicate your acceptance of this License to do so, and paulo@0: all its terms and conditions for copying, distributing or modifying paulo@0: the Program or works based on it. paulo@0: paulo@0: 6. 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If you cannot paulo@0: distribute so as to satisfy simultaneously your obligations under this paulo@0: License and any other pertinent obligations, then as a consequence you paulo@0: may not distribute the Program at all. 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Many people have made paulo@0: generous contributions to the wide range of software distributed paulo@0: through that system in reliance on consistent application of that paulo@0: system; it is up to the author/donor to decide if he or she is willing paulo@0: to distribute software through any other system and a licensee cannot paulo@0: impose that choice. paulo@0: paulo@0: This section is intended to make thoroughly clear what is believed to paulo@0: be a consequence of the rest of this License. paulo@0: paulo@0: 8. If the distribution and/or use of the Program is restricted in paulo@0: certain countries either by patents or by copyrighted interfaces, the paulo@0: original copyright holder who places the Program under this License paulo@0: may add an explicit geographical distribution limitation excluding paulo@0: those countries, so that distribution is permitted only in or among paulo@0: countries not thus excluded. In such case, this License incorporates paulo@0: the limitation as if written in the body of this License. paulo@0: paulo@0: 9. The Free Software Foundation may publish revised and/or new versions paulo@0: of the General Public License from time to time. Such new versions will paulo@0: be similar in spirit to the present version, but may differ in detail to paulo@0: address new problems or concerns. paulo@0: paulo@0: Each version is given a distinguishing version number. If the Program paulo@0: specifies a version number of this License which applies to it and "any paulo@0: later version", you have the option of following the terms and conditions paulo@0: either of that version or of any later version published by the Free paulo@0: Software Foundation. If the Program does not specify a version number of paulo@0: this License, you may choose any version ever published by the Free Software paulo@0: Foundation. paulo@0: paulo@0: 10. If you wish to incorporate parts of the Program into other free paulo@0: programs whose distribution conditions are different, write to the author paulo@0: to ask for permission. For software which is copyrighted by the Free paulo@0: Software Foundation, write to the Free Software Foundation; we sometimes paulo@0: make exceptions for this. Our decision will be guided by the two goals paulo@0: of preserving the free status of all derivatives of our free software and paulo@0: of promoting the sharing and reuse of software generally. paulo@0: paulo@0: NO WARRANTY paulo@0: paulo@0: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY paulo@0: FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN paulo@0: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES paulo@0: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED paulo@0: OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF paulo@0: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS paulo@0: TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE paulo@0: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, paulo@0: REPAIR OR CORRECTION. paulo@0: paulo@0: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING paulo@0: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR paulo@0: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, paulo@0: INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING paulo@0: OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED paulo@0: TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY paulo@0: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER paulo@0: PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE paulo@0: POSSIBILITY OF SUCH DAMAGES. paulo@0: paulo@0: END OF TERMS AND CONDITIONS paulo@0: paulo@0: How to Apply These Terms to Your New Programs paulo@0: paulo@0: If you develop a new program, and you want it to be of the greatest paulo@0: possible use to the public, the best way to achieve this is to make it paulo@0: free software which everyone can redistribute and change under these terms. paulo@0: paulo@0: To do so, attach the following notices to the program. It is safest paulo@0: to attach them to the start of each source file to most effectively paulo@0: convey the exclusion of warranty; and each file should have at least paulo@0: the "copyright" line and a pointer to where the full notice is found. paulo@0: paulo@0: paulo@0: Copyright (C) paulo@0: paulo@0: This program is free software; you can redistribute it and/or modify paulo@0: it under the terms of the GNU General Public License as published by paulo@0: the Free Software Foundation; either version 2 of the License, or paulo@0: (at your option) any later version. paulo@0: paulo@0: This program is distributed in the hope that it will be useful, paulo@0: but WITHOUT ANY WARRANTY; without even the implied warranty of paulo@0: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the paulo@0: GNU General Public License for more details. paulo@0: paulo@0: You should have received a copy of the GNU General Public License paulo@0: along with this program; if not, write to the Free Software paulo@0: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA paulo@0: paulo@0: paulo@0: Also add information on how to contact you by electronic and paper mail. paulo@0: paulo@0: If the program is interactive, make it output a short notice like this paulo@0: when it starts in an interactive mode: paulo@0: paulo@0: Gnomovision version 69, Copyright (C) year name of author paulo@0: Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. paulo@0: This is free software, and you are welcome to redistribute it paulo@0: under certain conditions; type `show c' for details. paulo@0: paulo@0: The hypothetical commands `show w' and `show c' should show the appropriate paulo@0: parts of the General Public License. Of course, the commands you use may paulo@0: be called something other than `show w' and `show c'; they could even be paulo@0: mouse-clicks or menu items--whatever suits your program. paulo@0: paulo@0: You should also get your employer (if you work as a programmer) or your paulo@0: school, if any, to sign a "copyright disclaimer" for the program, if paulo@0: necessary. Here is a sample; alter the names: paulo@0: paulo@0: Yoyodyne, Inc., hereby disclaims all copyright interest in the program paulo@0: `Gnomovision' (which makes passes at compilers) written by James Hacker. paulo@0: paulo@0: , 1 April 1989 paulo@0: Ty Coon, President of Vice paulo@0: paulo@0: This General Public License does not permit incorporating your program into paulo@0: proprietary programs. If your program is a subroutine library, you may paulo@0: consider it more useful to permit linking proprietary applications with the paulo@0: library. If this is what you want to do, use the GNU Library General paulo@0: Public License instead of this License.