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LICENSE
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LICENSE
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The GNU General Public License (GPL-2.0)
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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
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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 is
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covered by the GNU Library 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.
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Our General Public Licenses are designed to make sure that you have the
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freedom to distribute copies of free software (and charge for this service
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if you wish), that you receive source code or can get it if you want it,
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that you can change the software or use pieces of it in new free programs;
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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
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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 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
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for a fee, you must give the recipients all the rights that you have.
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You must make sure that they, too, receive or can get the source code.
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And you 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
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(2) offer you this license which gives you legal permission to copy,
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distribute 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.
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If the software is modified by someone else and passed on, we want its
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recipients to know that what they have is not the original, so that any
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problems introduced by others will not reflect on the
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original authors' reputations.
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Finally, any free program is threatened constantly by software patents.
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We wish to avoid the danger that redistributors of a free program will
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individually obtain patent licenses, in effect making the program proprietary.
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To prevent this, we have made it clear that any patent must be licensed for
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everyone's free use or not licensed at all.
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The precise terms and conditions for copying, distribution
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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
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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
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program or work, and a "work based on the Program" means either the Program
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or any derivative work under copyright law: that is to say, a work containing
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the Program or a portion of it, either verbatim or with modifications and/or
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translated into another language. (Hereinafter, translation is included
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without limitation in the term "modification".)
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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
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what the Program 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
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appropriately publish on each copy an appropriate copyright notice and
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disclaimer of warranty; keep intact all the notices that refer to this
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License and to the absence of any warranty; and give any other recipients
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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
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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
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modifications or work under the terms of Section 1 above, provided that you
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also meet all of these conditions:
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a) You must cause the modified files to carry prominent notices stating
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that 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
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or in part contains or is derived from the Program or any part thereof,
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to be licensed as a whole at no charge to all third parties under
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the terms of this 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
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most ordinary way, to print or display an announcement including an
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appropriate copyright notice and a notice that there is no warranty
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(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
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to view a copy of this License. (Exception: if the Program itself is
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interactive but does not normally print such an announcement, your work
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based on the Program is not required to print 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
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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
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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
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works based 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
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the scope of this License.
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3. You may copy and distribute the Program (or a work based on it,
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under Section 2) in object code or executable form under the terms of
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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
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code, which must be distributed under the terms of Sections 1 and 2 above
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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
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give any third party, for a charge no more than your cost of physically
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performing source distribution, a complete machine-readable copy of the
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corresponding source code, to be distributed under the terms of
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Sections 1 and 2 above on a medium customarily used
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for software interchange; or,
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c) Accompany it with the information you received as to the offer to
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distribute corresponding source code. (This alternative is allowed only
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for noncommercial distribution and only if you received the program in
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object code or executable form with such an offer, in accord
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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
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installation of the executable. However, as a special exception, the source
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code distributed need not include anything that is normally distributed
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(in either source or binary form) with the major components (compiler, kernel,
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and so on) of the operating system on which the executable runs, unless that
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component itself 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
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along with the object code.
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4. You may not copy, modify, sublicense, or distribute the Program except as
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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
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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.
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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
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License to do so, and all its terms and conditions for copying, distributing
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or 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),
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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
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and conditions. You may not impose any further restrictions on the recipients'
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exercise of the rights granted herein. You are not responsible for enforcing
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compliance by third parties to this License.
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7. If, as a consequence of a court judgment or allegation of patent
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infringement or for any other reason (not limited to patent issues),
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conditions are imposed on you (whether by court order, agreement or otherwise)
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that contradict the conditions of this License, they do not excuse you from
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the conditions of this License. If you cannot distribute so as to satisfy
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simultaneously your obligations under this License and any other pertinent
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obligations, then as a consequence you may not distribute the Program at all.
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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
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through you, then the only way you could satisfy both it and this License
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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
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particular circumstance, the balance of the section is intended to apply
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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
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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
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that system; it is up to the author/donor to decide if he or she is willing
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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
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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
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copyright holder who places the Program under this License may add an explicit
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geographical distribution limitation excluding those countries, so that
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distribution is permitted only in or among countries not thus excluded.
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In such case, this License incorporates the limitation as if written
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in the body of this License.
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9. The Free Software Foundation may publish revised and/or new versions of the
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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
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new problems or concerns.
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Each version is given a distinguishing version number. If the Program
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specifies a version number of this License which applies to it and
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"any later version", you have the option of following the terms and conditions
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either of that version or of any later version published by the
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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
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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 of
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all derivatives of our free software and of promoting the sharing
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and reuse 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
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PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
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PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE,
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YOU ASSUME 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 WILL
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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
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SUCH 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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