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COPYING 15KB

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  1. GNU GENERAL PUBLIC LICENSE
  2. Version 2, June 1991
  3. Copyright (C) 1989, 1991 Free Software Foundation, Inc. 51 Franklin Street,
  4. Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and
  5. distribute verbatim copies of this license document, but changing it is not
  6. allowed.
  7. Preamble
  8. The licenses for most software are designed to take away your freedom to
  9. share and change it. By contrast, the GNU General Public License is
  10. intended to guarantee your freedom to share and change free software--to
  11. make sure the software is free for all its users. This General Public
  12. License applies to most of the Free Software Foundation's software and to
  13. any other program whose authors commit to using it. (Some other Free
  14. Software Foundation software is covered by the GNU Lesser General Public
  15. License instead.) You can apply it to your programs, too.
  16. When we speak of free software, we are referring to freedom, not price. Our
  17. General Public Licenses are designed to make sure that you have the freedom
  18. to distribute copies of free software (and charge for this service if you
  19. wish), that you receive source code or can get it if you want it, that you
  20. can change the software or use pieces of it in new free programs; and that
  21. you know you can do these things.
  22. To protect your rights, we need to make restrictions that forbid anyone to
  23. deny you these rights or to ask you to surrender the rights. These
  24. restrictions translate to certain responsibilities for you if you distribute
  25. copies of the software, or if you modify it.
  26. For example, if you distribute copies of such a program, whether gratis or
  27. for a fee, you must give the recipients all the rights that you have. You
  28. must make sure that they, too, receive or can get the source code. And you
  29. must show them these terms so they know their rights.
  30. We protect your rights with two steps: (1) copyright the software, and (2)
  31. offer you this license which gives you legal permission to copy, distribute
  32. and/or modify the software.
  33. Also, for each author's protection and ours, we want to make certain that
  34. everyone understands that there is no warranty for this free software. If
  35. the software is modified by someone else and passed on, we want its
  36. recipients to know that what they have is not the original, so that any
  37. problems introduced by others will not reflect on the original authors'
  38. reputations.
  39. Finally, any free program is threatened constantly by software patents. We
  40. wish to avoid the danger that redistributors of a free program will
  41. individually obtain patent licenses, in effect making the program
  42. proprietary. To prevent this, we have made it clear that any patent must be
  43. licensed for everyone's free use or not licensed at all.
  44. The precise terms and conditions for copying, distribution and modification
  45. follow.
  46. GNU GENERAL PUBLIC LICENSE
  47. TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
  48. 0. This License applies to any program or other work which contains a notice
  49. placed by the copyright holder saying it may be distributed under the
  50. terms of this General Public License. The "Program", below, refers to
  51. any such program or work, and a "work based on the Program" means either
  52. the Program or any derivative work under copyright law: that is to say, a
  53. work containing the Program or a portion of it, either verbatim or with
  54. modifications and/or translated into another language. (Hereinafter,
  55. translation is included without limitation in the term "modification".)
  56. Each licensee is addressed as "you".
  57. Activities other than copying, distribution and modification are not
  58. covered by this License; they are outside its scope. The act of running
  59. the Program is not restricted, and the output from the Program is covered
  60. only if its contents constitute a work based on the Program (independent
  61. of having been made by running the Program). Whether that is true depends
  62. on what the Program does.
  63. 1. You may copy and distribute verbatim copies of the Program's source code
  64. as you receive it, in any medium, provided that you conspicuously and
  65. appropriately publish on each copy an appropriate copyright notice and
  66. disclaimer of warranty; keep intact all the notices that refer to this
  67. License and to the absence of any warranty; and give any other recipients
  68. of the Program a copy of this License along with the Program.
  69. You may charge a fee for the physical act of transferring a copy, and you
  70. may at your option offer warranty protection in exchange for a fee.
  71. 2. You may modify your copy or copies of the Program or any portion of it,
  72. thus forming a work based on the Program, and copy and distribute such
  73. modifications or work under the terms of Section 1 above, provided that
  74. you also meet all of these conditions:
  75. a) You must cause the modified files to carry prominent notices stating
  76. that you changed the files and the date of any change.
  77. b) You must cause any work that you distribute or publish, that in whole
  78. or in part contains or is derived from the Program or any part
  79. thereof, to be licensed as a whole at no charge to all third parties
  80. under the terms of this License.
  81. c) If the modified program normally reads commands interactively when
  82. run, you must cause it, when started running for such interactive use
  83. in the most ordinary way, to print or display an announcement
  84. including an appropriate copyright notice and a notice that there is
  85. no warranty (or else, saying that you provide a warranty) and that
  86. users may redistribute the program under these conditions, and telling
  87. the user how to view a copy of this License. (Exception: if the
  88. Program itself is interactive but does not normally print such an
  89. announcement, your work based on the Program is not required to print
  90. an announcement.)
  91. These requirements apply to the modified work as a whole. If
  92. identifiable sections of that work are not derived from the Program, and
  93. can be reasonably considered independent and separate works in
  94. themselves, then this License, and its terms, do not apply to those
  95. sections when you distribute them as separate works. But when you
  96. distribute the same sections as part of a whole which is a work based on
  97. the Program, the distribution of the whole must be on the terms of this
  98. License, whose permissions for other licensees extend to the entire
  99. whole, and thus to each and every part regardless of who wrote it.
  100. Thus, it is not the intent of this section to claim rights or contest
  101. your rights to work written entirely by you; rather, the intent is to
  102. exercise the right to control the distribution of derivative or
  103. collective works based on the Program.
  104. In addition, mere aggregation of another work not based on the Program
  105. with the Program (or with a work based on the Program) on a volume of a
  106. storage or distribution medium does not bring the other work under the
  107. scope of this License.
  108. 3. You may copy and distribute the Program (or a work based on it, under
  109. Section 2) in object code or executable form under the terms of Sections
  110. 1 and 2 above provided that you also do one of the following:
  111. a) Accompany it with the complete corresponding machine-readable source
  112. code, which must be distributed under the terms of Sections 1 and 2
  113. above on a medium customarily used for software interchange; or,
  114. b) Accompany it with a written offer, valid for at least three years, to
  115. give any third party, for a charge no more than your cost of
  116. physically performing source distribution, a complete machine-readable
  117. copy of the corresponding source code, to be distributed under the
  118. terms of Sections 1 and 2 above on a medium customarily used for
  119. software interchange; or,
  120. c) Accompany it with the information you received as to the offer to
  121. distribute corresponding source code. (This alternative is allowed
  122. only for noncommercial distribution and only if you received the
  123. program in object code or executable form with such an offer, in
  124. accord with Subsection b above.)
  125. The source code for a work means the preferred form of the work for
  126. making modifications to it. For an executable work, complete source code
  127. means all the source code for all modules it contains, plus any
  128. associated interface definition files, plus the scripts used to control
  129. compilation and installation of the executable. However, as a special
  130. exception, the source code distributed need not include anything that is
  131. normally distributed (in either source or binary form) with the major
  132. components (compiler, kernel, and so on) of the operating system on which
  133. the executable runs, unless that component itself accompanies the
  134. executable.
  135. If distribution of executable or object code is made by offering access
  136. to copy from a designated place, then offering equivalent access to copy
  137. the source code from the same place counts as distribution of the source
  138. code, even though third parties are not compelled to copy the source
  139. along with the object code.
  140. 4. You may not copy, modify, sublicense, or distribute the Program except as
  141. expressly provided under this License. Any attempt otherwise to copy,
  142. modify, sublicense or distribute the Program is void, and will
  143. automatically terminate your rights under this License. However, parties
  144. who have received copies, or rights, from you under this License will not
  145. have their licenses terminated so long as such parties remain in full
  146. compliance.
  147. 5. You are not required to accept this License, since you have not signed
  148. it. However, nothing else grants you permission to modify or distribute
  149. the Program or its derivative works. These actions are prohibited by law
  150. if you do not accept this License. Therefore, by modifying or
  151. distributing the Program (or any work based on the Program), you indicate
  152. your acceptance of this License to do so, and all its terms and
  153. conditions for copying, distributing or modifying the Program or works
  154. based on it.
  155. 6. Each time you redistribute the Program (or any work based on the
  156. Program), the recipient automatically receives a license from the
  157. original licensor to copy, distribute or modify the Program subject to
  158. these terms and conditions. You may not impose any further restrictions
  159. on the recipients' exercise of the rights granted herein. You are not
  160. responsible for enforcing compliance by third parties to this License.
  161. 7. If, as a consequence of a court judgment or allegation of patent
  162. infringement or for any other reason (not limited to patent issues),
  163. conditions are imposed on you (whether by court order, agreement or
  164. otherwise) that contradict the conditions of this License, they do not
  165. excuse you from the conditions of this License. If you cannot distribute
  166. so as to satisfy simultaneously your obligations under this License and
  167. any other pertinent obligations, then as a consequence you may not
  168. distribute the Program at all. For example, if a patent license would
  169. not permit royalty-free redistribution of the Program by all those who
  170. receive copies directly or indirectly through you, then the only way you
  171. could satisfy both it and this License would be to refrain entirely from
  172. distribution of the Program.
  173. If any portion of this section is held invalid or unenforceable under any
  174. particular circumstance, the balance of the section is intended to apply
  175. and the section as a whole is intended to apply in other circumstances.
  176. It is not the purpose of this section to induce you to infringe any
  177. patents or other property right claims or to contest validity of any such
  178. claims; this section has the sole purpose of protecting the integrity of
  179. the free software distribution system, which is implemented by public
  180. license practices. Many people have made generous contributions to the
  181. wide range of software distributed through that system in reliance on
  182. consistent application of that system; it is up to the author/donor to
  183. decide if he or she is willing to distribute software through any other
  184. system and a licensee cannot impose that choice.
  185. This section is intended to make thoroughly clear what is believed to be
  186. a consequence of the rest of this License.
  187. 8. If the distribution and/or use of the Program is restricted in certain
  188. countries either by patents or by copyrighted interfaces, the original
  189. copyright holder who places the Program under this License may add an
  190. explicit geographical distribution limitation excluding those countries,
  191. so that distribution is permitted only in or among countries not thus
  192. excluded. In such case, this License incorporates the limitation as if
  193. written in the body of this License.
  194. 9. The Free Software Foundation may publish revised and/or new versions of
  195. the General Public License from time to time. Such new versions will be
  196. similar in spirit to the present version, but may differ in detail to
  197. address new problems or concerns.
  198. Each version is given a distinguishing version number. If the Program
  199. specifies a version number of this License which applies to it and "any
  200. later version", you have the option of following the terms and conditions
  201. either of that version or of any later version published by the Free
  202. Software Foundation. If the Program does not specify a version number of
  203. this License, you may choose any version ever published by the Free
  204. Software Foundation.
  205. 10. If you wish to incorporate parts of the Program into other free programs
  206. whose distribution conditions are different, write to the author to ask
  207. for permission. For software which is copyrighted by the Free Software
  208. Foundation, write to the Free Software Foundation; we sometimes make
  209. exceptions for this. Our decision will be guided by the two goals of
  210. preserving the free status of all derivatives of our free software and
  211. of promoting the sharing and reuse of software generally.
  212. NO WARRANTY
  213. 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR
  214. THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
  215. OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
  216. PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
  217. EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  218. WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
  219. ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH
  220. YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
  221. NECESSARY SERVICING, REPAIR OR CORRECTION.
  222. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
  223. WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
  224. REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
  225. DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL
  226. DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM
  227. (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
  228. INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF
  229. THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR
  230. OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.