203 lines
14 KiB
Plaintext
203 lines
14 KiB
Plaintext
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The GNU General Public License (GPL)
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Version 2, June 1991
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Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Everyone is permitted to copy and distribute verbatim copies
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of this license 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 and change it. By contrast, the GNU
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General Public License is intended to 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 most of the Free Software Foundation's
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software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is
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covered by the GNU Library General Public License instead.) You can apply it to your programs, too.
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When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make
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sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you
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receive source code or can get it if you want it, that you can change the software or use pieces of it in new free
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programs; and that you know you can do these things.
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To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to
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surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the
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software, or if you modify it.
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For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all
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the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them
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these terms so they know their rights.
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We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal
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permission to copy, distribute and/or modify the software.
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Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty
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for this free software. If the software is modified by someone else and passed on, we want its recipients to know that
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what they have is not the original, so that any problems introduced by others will not reflect on the original authors'
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reputations.
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Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors
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of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this,
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we have made it clear that any patent must be licensed for everyone's free use or not licensed at all.
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The precise terms and conditions for copying, distribution and modification 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 placed by the copyright holder saying it
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may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or
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work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to
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say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into
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another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is
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addressed as "you".
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Activities other than copying, distribution and modification are not covered by this License; they are outside its
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scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents
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constitute a work based on the Program (independent of having been made by running the Program). Whether that is true
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depends on what the Program does.
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1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided
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that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of
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warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other
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recipients of the Program a copy of this License along with the Program.
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You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection
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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, thus forming a work based on the Program, and
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copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of
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these conditions:
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a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any
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change.
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b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the
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Program or any part thereof, to be 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, you must cause it, when started running for
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such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright
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notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may
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redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if
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the Program itself is interactive but does not normally print such an announcement, your work based on the Program is
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not required to print an announcement.)
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These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the
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Program, and can be reasonably considered independent and separate works in themselves, then this License, and its
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terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same
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sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of
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this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part
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regardless of who wrote it.
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Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you;
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rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the
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Program.
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In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the
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Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License.
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3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form
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under the terms of Sections 1 and 2 above provided that you also do one of the following:
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a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms
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of Sections 1 and 2 above on a medium 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 any third party, for a charge no more than
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your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source
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code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange;
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or,
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c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This
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alternative is allowed only for noncommercial distribution and only if you received the program in object code or
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executable 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 modifications to it. For an executable work,
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complete source code means all the source code for all modules it contains, plus any associated interface definition
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files, plus the scripts used to control compilation and installation of the executable. However, as a special exception,
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the source code distributed need not include anything that is normally distributed (in either source or binary form)
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with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless
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that component itself accompanies the executable.
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If distribution of executable or object code is made by offering access to copy from a designated place, then offering
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equivalent access to copy the source code from the same place counts as distribution of the source code, even though
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third parties are not compelled to copy the source along with the object code.
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4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any
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attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your
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rights under this License. However, parties who have received copies, or rights, from you under this License will not
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have their licenses terminated 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 it. However, nothing else grants you
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permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do
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not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you
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indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or
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modifying 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), the recipient automatically receives a
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license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You
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may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not
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responsible for enforcing compliance by third parties to this License.
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7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to
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patent issues), conditions are imposed 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 this License. If you cannot distribute so as
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to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence
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you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution
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of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy
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both it and this License would be to refrain entirely from distribution of the Program.
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If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the
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section is intended to apply and 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 or other property right claims or to contest
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validity of any such claims; this section has the sole purpose of protecting the integrity of the free software
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distribution system, which is implemented by public license practices. Many people have made generous contributions to
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the wide range of software distributed through that system in reliance on consistent application of that system; it is
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up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee
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cannot impose that choice.
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This section is intended to make thoroughly clear what is believed to be a 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 countries either by patents or by copyrighted
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interfaces, the original copyright 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 permitted only in or among countries not thus
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excluded. In such case, this 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 the General Public License from time to time.
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Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or
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concerns.
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Each version is given a distinguishing version number. If the Program specifies a version number of this License which
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applies to it and "any later version", 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 Program does not specify a version number of
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this License, you may choose 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 whose distribution conditions are
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different, write to the author to ask for 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. Our decision will be guided by the two
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goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of
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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 THE PROGRAM, TO THE EXTENT PERMITTED BY
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APPLICABLE LAW. EXCEPT WHEN OTHERWISE 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, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
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PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
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CORRECTION.
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12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY
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WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL,
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SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT
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LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF
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THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGES.
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END OF TERMS AND CONDITIONS
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