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323 lines
16 KiB
Markdown
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title = "License"
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description = "This tutorial's license"
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chapter = false
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weight = 4
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License
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-------
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All chapters copyright of the authors (see below). Unless otherwise
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stated all chapters in this manual licensed with **GNU General Public
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License version 2**.
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This documentation is free documentation; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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This documentation is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this documentation; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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General Public License
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----------------------
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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
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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
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share and change it. By contrast, the GNU General Public License is
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intended to guarantee your freedom to share and change free software--to
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make sure the software is free for all its users. This General Public
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License applies to most of the Free Software Foundation's software and
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to any other program whose authors commit to using it. (Some other Free
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Software Foundation software is covered by the GNU Lesser General Public
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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.
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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
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service if you wish), that you receive source code or can get it if you
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want it, that you can change the software or use pieces of it in new
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free 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
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to deny you these rights or to ask you to surrender the rights. These
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restrictions translate to certain responsibilities for you if you
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distribute copies of the software, or if you modify it.
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For example, if you distribute copies of such a program, whether gratis
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or 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
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that everyone understands that there is no warranty for this free
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software. If the software is modified by someone else and passed on, we
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want its recipients to know that what they have is not the original, so
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that any problems introduced by others will not reflect on the original
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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
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proprietary. To prevent this, we have made it clear that any patent must
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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
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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
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a notice placed by the copyright holder saying it may be distributed
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under the terms of this General Public License. The "Program", below,
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refers to any such program or work, and a "work based on the Program"
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means either the Program or any derivative work under copyright law:
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that is to say, a work containing the Program or a portion of it, either
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verbatim or with modifications and/or translated into another language.
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(Hereinafter, translation is included without limitation in the term
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"modification".) Each licensee is addressed as "you".
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Activities other than copying, distribution and modification are not
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covered by this License; they are outside its scope. The act of running
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the Program is not restricted, and the output from the Program is
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covered only if its contents constitute a work based on the Program
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(independent of having been made by running the Program). Whether that
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is true depends on what the Program does.
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**1.** You may copy and distribute verbatim copies of the Program's
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source code as you receive it, in any medium, provided that you
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conspicuously and appropriately publish on each copy an appropriate
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copyright notice and disclaimer of warranty; keep intact all the notices
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that refer to this License and to the absence of any warranty; and give
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any other recipients of the Program a copy of this License along with
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the Program.
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You may charge a fee for the physical act of transferring a copy, and
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you 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
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of it, thus forming a work based on the Program, and copy and distribute
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such modifications or work under the terms of Section 1 above, provided
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that you also meet all of these conditions:
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**a)** You must cause the modified files to carry prominent notices
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stating 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
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whole or in part contains or is derived from the Program or any part
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thereof, to be licensed as a whole at no charge to all third parties
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under the terms of this License.
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**c)** If the modified program normally reads commands interactively
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when run, you must cause it, when started running for such interactive
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use in the most ordinary way, to print or display an announcement
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including an appropriate copyright notice and a notice that there is no
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warranty (or else, saying that you provide a warranty) and that users
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may redistribute the program under these conditions, and telling the
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user how to view a copy of this License. (Exception: if the Program
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itself is interactive but does not normally print such an announcement,
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your work based on the Program is not required to print an
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announcement.)
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These requirements apply to the modified work as a whole. If
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identifiable sections of that work are not derived from the Program, and
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can be reasonably considered independent and separate works in
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themselves, then this License, and its terms, do not apply to those
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sections when you distribute them as separate works. But when you
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distribute the same sections as part of a whole which is a work based on
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the Program, the distribution of the whole must be on the terms of this
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License, whose permissions for other licensees extend to the entire
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whole, and thus to each and every part regardless of who wrote it.
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Thus, it is not the intent of this section to claim rights or contest
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your rights to work written entirely by you; rather, the intent is to
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exercise the right to control the distribution of derivative or
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collective works based on the Program.
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In addition, mere aggregation of another work not based on the Program
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with the Program (or with a work based on the Program) on a volume of a
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storage or distribution medium does not bring the other work under the
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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
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source code, which must be distributed under the terms of Sections 1 and
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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
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years, to give any third party, for a charge no more than your cost of
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physically performing source distribution, a complete machine-readable
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copy of the corresponding source code, to be distributed under the terms
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of Sections 1 and 2 above on a medium customarily used for software
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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 with
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Subsection b above.)
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The source code for a work means the preferred form of the work for
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making modifications to it. For an executable work, complete source code
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means all the source code for all modules it contains, plus any
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associated interface definition files, plus the scripts used to control
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compilation and installation of the executable. However, as a special
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exception, the source code distributed need not include anything that is
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normally distributed (in either source or binary form) with the major
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components (compiler, kernel, and so on) of the operating system on
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which the executable runs, unless that component itself accompanies the
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executable.
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If distribution of executable or object code is made by offering access
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to copy from a designated place, then offering equivalent access to copy
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the source code from the same place counts as distribution of the source
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code, 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
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except as expressly provided under this License. Any attempt otherwise
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to copy, modify, sublicense or distribute the Program is void, and will
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automatically terminate your rights under this License. However, parties
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who have received copies, or rights, from you under this License will
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not have their licenses terminated so long as such parties remain in
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full compliance.
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**5.** You are not required to accept this License, since you have not
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signed it. However, nothing else grants you permission to modify or
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distribute the Program or its derivative works. These actions are
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prohibited by law if you do not accept this License. Therefore, by
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modifying or distributing the Program (or any work based on the
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Program), you indicate your acceptance of this License to do so, and all
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its terms and conditions for copying, distributing or modifying the
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Program or works based on it.
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**6.** Each time you redistribute the Program (or any work based on the
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Program), the recipient automatically receives a license from the
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original licensor to copy, distribute or modify the Program subject to
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these terms and conditions. You may not impose any further restrictions
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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
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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
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otherwise) that contradict the conditions of this License, they do not
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excuse you from the conditions of this License. If you cannot distribute
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so as to satisfy simultaneously your obligations under this License and
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any other pertinent obligations, then as a consequence you may not
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distribute the Program at all. For example, if a patent license would
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not permit royalty-free redistribution of the Program by all those who
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receive copies directly or indirectly through you, then the only way you
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could satisfy both it and this License would be to refrain entirely from
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distribution of the Program.
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If any portion of this section is held invalid or unenforceable under
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any particular circumstance, the balance of the section is intended to
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apply and the section as a whole is intended to apply in other
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circumstances.
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It is not the purpose of this section to induce you to infringe any
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patents or other property right claims or to contest validity of any
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such claims; this section has the sole purpose of protecting the
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integrity of the free software distribution system, which is implemented
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by public license practices. Many people have made generous
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contributions to the wide range of software distributed through that
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system in reliance on consistent application of that system; it is up to
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the author/donor to decide if he or she is willing to distribute
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software through any other system and a licensee cannot impose that
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choice.
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This section is intended to make thoroughly clear what is believed to be
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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
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certain countries either by patents or by copyrighted interfaces, the
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original copyright holder who places the Program under this License may
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add an explicit geographical distribution limitation excluding those
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countries, so that distribution is permitted only in or among countries
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not thus excluded. In such case, this License incorporates the
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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
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versions of the General Public License from time to time. Such new
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versions will be similar in spirit to the present version, but may
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differ in detail to address 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 "any
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later version", you have the option of following the terms and
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conditions either of that version or of any later version published by
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the Free Software Foundation. If the Program does not specify a version
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number of this License, you may choose any version ever published by the
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Free Software Foundation.
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**10.** If you wish to incorporate parts of the Program into other free
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programs whose distribution conditions are different, write to the
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author to ask for permission. For software which is copyrighted by the
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Free Software Foundation, write to the Free Software Foundation; we
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sometimes make exceptions for this. Our decision will be guided by the
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two goals of preserving the free status of all derivatives of our free
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software and of promoting the sharing 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
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WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
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EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
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OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
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EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
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ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH
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YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
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NECESSARY SERVICING, REPAIR OR CORRECTION.
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**12.** IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
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WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
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AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
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DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
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DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM
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(INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
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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
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OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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**END OF TERMS AND CONDITIONS**
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