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