COPYING 18 KB

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  1. GNU GENERAL PUBLIC LICENSE
  2. Version 2, June 1991
  3. Copyright (C) 1989, 1991 Free Software Foundation, Inc.
  4. 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  5. Everyone is permitted to copy and distribute verbatim copies
  6. of this license document, but changing it is not allowed.
  7. Preamble
  8. The licenses for most software are designed to take away your freedom
  9. to share and change it. By contrast, the GNU General Public License
  10. is intended to guarantee your freedom to share and change free
  11. software--to make sure the software is free for all its users. This
  12. General Public License applies to most of the Free Software
  13. Foundation's software and to any other program whose authors commit
  14. to using it. (Some other Free Software Foundation software is covered
  15. by the GNU Library General Public License instead.) You can apply it
  16. to your programs, too.
  17. When we speak of free software, we are referring to freedom, not
  18. price. Our General Public Licenses are designed to make sure that you
  19. have the freedom to distribute copies of free software (and charge
  20. for this service if you wish), that you receive source code or can
  21. get it if you want it, that you can change the software or use pieces
  22. of it in new free programs; and that you know you can do these
  23. things.
  24. To protect your rights, we need to make restrictions that forbid
  25. anyone to deny you these rights or to ask you to surrender the
  26. rights. These restrictions translate to certain responsibilities for
  27. you if you distribute copies of the software, or if you modify it.
  28. For example, if you distribute copies of such a program, whether
  29. gratis or for a fee, you must give the recipients all the rights that
  30. you have. You must make sure that they, too, receive or can get the
  31. source code. And you must show them these terms so they know their
  32. rights.
  33. We protect your rights with two steps: (1) copyright the software,
  34. and (2) offer you this license which gives you legal permission to
  35. copy, distribute and/or modify the software.
  36. Also, for each author's protection and ours, we want to make certain
  37. that everyone understands that there is no warranty for this free
  38. software. If the software is modified by someone else and passed on,
  39. we want its recipients to know that what they have is not the
  40. original, so that any problems introduced by others will not reflect
  41. on the original authors' reputations.
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  43. patents. We wish to avoid the danger that redistributors of a free
  44. program will individually obtain patent licenses, in effect making
  45. the program proprietary. To prevent this, we have made it clear that
  46. any patent must be licensed for everyone's free use or not licensed
  47. at all.
  48. The precise terms and conditions for copying, distribution and
  49. modification follow.
  50. TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
  51. 0. This License applies to any program or other work which contains a
  52. notice placed by the copyright holder saying it may be distributed
  53. under the terms of this General Public License. The "Program", below,
  54. refers to any such program or work, and a "work based on the Program"
  55. means either the Program or any derivative work under copyright law:
  56. that is to say, a work containing the Program or a portion of it,
  57. either verbatim or with modifications and/or translated into another
  58. language. (Hereinafter, translation is included without limitation in
  59. the term "modification".) Each licensee is addressed as "you".
  60. Activities other than copying, distribution and modification are not
  61. covered by this License; they are outside its scope. The act of
  62. running the Program is not restricted, and the output from the
  63. Program is covered only if its contents constitute a work based on
  64. the Program (independent of having been made by running the Program).
  65. Whether that is true depends on what the Program does.
  66. 1. You may copy and distribute verbatim copies of the Program's
  67. source code as you receive it, in any medium, provided that you
  68. conspicuously and appropriately publish on each copy an appropriate
  69. copyright notice and disclaimer of warranty; keep intact all the
  70. notices that refer to this License and to the absence of any
  71. warranty; and give any other recipients of the Program a copy of this
  72. License along with the Program.
  73. You may charge a fee for the physical act of transferring a copy, and
  74. you may at your option offer warranty protection in exchange for a
  75. fee.
  76. 2. You may modify your copy or copies of the Program or any portion
  77. of it, thus forming a work based on the Program, and copy and
  78. distribute such modifications or work under the terms of Section 1
  79. above, provided that you also meet all of these conditions:
  80. a) You must cause the modified files to carry prominent notices
  81. stating that you changed the files and the date of any change.
  82. b) You must cause any work that you distribute or publish, that in
  83. whole or in part contains or is derived from the Program or any part
  84. thereof, to be licensed as a whole at no charge to all third parties
  85. under the terms of this License.
  86. c) If the modified program normally reads commands interactively when
  87. run, you must cause it, when started running for such interactive use
  88. in the most ordinary way, to print or display an announcement
  89. including an appropriate copyright notice and a notice that there is
  90. no warranty (or else, saying that you provide a warranty) and that
  91. users may redistribute the program under these conditions, and
  92. telling the user how to view a copy of this License. (Exception: if
  93. the Program itself is interactive but does not normally print such an
  94. announcement, your work based on the Program is not required to print
  95. an announcement.)
  96. These requirements apply to the modified work as a whole. If
  97. identifiable sections of that work are not derived from the Program,
  98. and can be reasonably considered independent and separate works in
  99. themselves, then this License, and its terms, do not apply to those
  100. sections when you distribute them as separate works. But when you
  101. distribute the same sections as part of a whole which is a work based
  102. on the Program, the distribution of the whole must be on the terms of
  103. this License, whose permissions for other licensees extend to the
  104. entire whole, and thus to each and every part regardless of who wrote
  105. it.
  106. Thus, it is not the intent of this section to claim rights or contest
  107. your rights to work written entirely by you; rather, the intent is to
  108. exercise the right to control the distribution of derivative or
  109. collective works based on the Program.
  110. In addition, mere aggregation of another work not based on the
  111. Program with the Program (or with a work based on the Program) on a
  112. volume of a storage or distribution medium does not bring the other
  113. work under the scope of this License.
  114. 3. You may copy and distribute the Program (or a work based on it,
  115. under Section 2) in object code or executable form under the terms of
  116. Sections 1 and 2 above provided that you also do one of the
  117. following:
  118. a) Accompany it with the complete corresponding machine-readable
  119. source code, which must be distributed under the terms of Sections 1
  120. and 2 above on a medium customarily used for software interchange;
  121. or,
  122. b) Accompany it with a written offer, valid for at least three years,
  123. to give any third party, for a charge no more than your cost of
  124. physically performing source distribution, a complete
  125. machine-readable copy of the corresponding source code, to be
  126. distributed under the terms of Sections 1 and 2 above on a medium
  127. customarily used for software interchange; or,
  128. c) Accompany it with the information you received as to the offer to
  129. distribute corresponding source code. (This alternative is allowed
  130. only for noncommercial distribution and only if you received the
  131. program in object code or executable form with such an offer, in
  132. accord with Subsection b above.)
  133. The source code for a work means the preferred form of the work for
  134. making modifications to it. For an executable work, complete source
  135. code means all the source code for all modules it contains, plus any
  136. associated interface definition files, plus the scripts used to
  137. control compilation and installation of the executable. However, as a
  138. special exception, the source code distributed need not include
  139. anything that is normally distributed (in either source or binary
  140. form) with the major components (compiler, kernel, and so on) of the
  141. operating system on which the executable runs, unless that component
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  143. If distribution of executable or object code is made by offering
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  145. access to copy the source code from the same place counts as
  146. distribution of the source code, even though third parties are not
  147. compelled to copy the source along with the object code.
  148. 4. You may not copy, modify, sublicense, or distribute the Program
  149. except as expressly provided under this License. Any attempt
  150. otherwise to copy, modify, sublicense or distribute the Program is
  151. void, and will automatically terminate your rights under this
  152. License. However, parties who have received copies, or rights, from
  153. you under this License will not have their licenses terminated so
  154. long as such parties remain in full compliance.
  155. 5. You are not required to accept this License, since you have not
  156. signed it. However, nothing else grants you permission to modify or
  157. distribute the Program or its derivative works. These actions are
  158. prohibited by law if you do not accept this License. Therefore, by
  159. modifying or distributing the Program (or any work based on the
  160. Program), you indicate your acceptance of this License to do so, and
  161. all its terms and conditions for copying, distributing or modifying
  162. the Program or works based on it.
  163. 6. Each time you redistribute the Program (or any work based on the
  164. Program), the recipient automatically receives a license from the
  165. original licensor to copy, distribute or modify the Program subject
  166. to these terms and conditions. You may not impose any further
  167. restrictions on the recipients' exercise of the rights granted
  168. herein. You are not responsible for enforcing compliance by third
  169. parties to this License.
  170. 7. If, as a consequence of a court judgment or allegation of patent
  171. infringement or for any other reason (not limited to patent issues),
  172. conditions are imposed on you (whether by court order, agreement or
  173. otherwise) that contradict the conditions of this License, they do
  174. not excuse you from the conditions of this License. If you cannot
  175. distribute so as to satisfy simultaneously your obligations under
  176. this License and any other pertinent obligations, then as a
  177. consequence you may not distribute the Program at all. For example,
  178. if a patent license would not permit royalty-free redistribution of
  179. the Program by all those who receive copies directly or indirectly
  180. through you, then the only way you could satisfy both it and this
  181. License would be to refrain entirely from distribution of the
  182. Program.
  183. If any portion of this section is held invalid or unenforceable under
  184. any particular circumstance, the balance of the section is intended
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  187. It is not the purpose of this section to induce you to infringe any
  188. patents or other property right claims or to contest validity of any
  189. such claims; this section has the sole purpose of protecting the
  190. integrity of the free software distribution system, which is
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  193. through that system in reliance on consistent application of that
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  195. willing to distribute software through any other system and a
  196. licensee cannot impose that choice.
  197. This section is intended to make thoroughly clear what is believed to
  198. be a consequence of the rest of this License.
  199. 8. If the distribution and/or use of the Program is restricted in
  200. certain countries either by patents or by copyrighted interfaces, the
  201. original copyright holder who places the Program under this License
  202. may add an explicit geographical distribution limitation excluding
  203. those countries, so that distribution is permitted only in or among
  204. countries not thus excluded. In such case, this License incorporates
  205. the limitation as if written in the body of this License.
  206. 9. The Free Software Foundation may publish revised and/or new
  207. versions of the General Public License from time to time. Such new
  208. versions will be similar in spirit to the present version, but may
  209. differ in detail to address new problems or concerns.
  210. Each version is given a distinguishing version number. If the Program
  211. specifies a version number of this License which applies to it and
  212. "any later version", you have the option of following the terms and
  213. conditions either of that version or of any later version published
  214. by the Free Software Foundation. If the Program does not specify a
  215. version number of this License, you may choose any version ever
  216. published by the Free Software Foundation.
  217. 10. If you wish to incorporate parts of the Program into other free
  218. programs whose distribution conditions are different, write to the
  219. author to ask for permission. For software which is copyrighted by
  220. the Free Software Foundation, write to the Free Software Foundation;
  221. we sometimes make exceptions for this. Our decision will be guided by
  222. the two goals of preserving the free status of all derivatives of our
  223. free software and of promoting the sharing and reuse of software
  224. generally.
  225. NO WARRANTY
  226. 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
  227. WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
  228. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
  229. OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY
  230. KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
  231. IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  232. PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
  233. PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
  234. THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
  235. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
  236. WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
  237. AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU
  238. FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
  239. CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
  240. PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
  241. RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
  242. FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
  243. SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
  244. SUCH DAMAGES.
  245. END OF TERMS AND CONDITIONS
  246. How to Apply These Terms to Your New Programs
  247. If you develop a new program, and you want it to be of the greatest
  248. possible use to the public, the best way to achieve this is to make
  249. it free software which everyone can redistribute and change under
  250. these terms.
  251. To do so, attach the following notices to the program. It is safest
  252. to attach them to the start of each source file to most effectively
  253. convey the exclusion of warranty; and each file should have at least
  254. the "copyright" line and a pointer to where the full notice is found.
  255. one line to give the program's name and an idea of what it does.
  256. Copyright (C) yyyy name of author
  257. This program is free software; you can redistribute it and/or
  258. modify it under the terms of the GNU General Public License
  259. as published by the Free Software Foundation; either version 2
  260. of the License, or (at your option) any later version.
  261. This program is distributed in the hope that it will be useful,
  262. but WITHOUT ANY WARRANTY; without even the implied warranty of
  263. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  264. GNU General Public License for more details.
  265. You should have received a copy of the GNU General Public License
  266. along with this program; if not, write to the Free Software
  267. Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  268. 02111-1307, USA.
  269. Also add information on how to contact you by electronic and paper
  270. mail.
  271. If the program is interactive, make it output a short notice like
  272. this when it starts in an interactive mode:
  273. Gnomovision version 69, Copyright (C) yyyy name of author
  274. Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
  275. type `show w'. This is free software, and you are welcome
  276. to redistribute it under certain conditions; type `show c'
  277. for details.
  278. The hypothetical commands `show w' and `show c' should show the
  279. appropriate parts of the General Public License. Of course, the
  280. commands you use may be called something other than `show w' and
  281. `show c'; they could even be mouse-clicks or menu items--whatever
  282. suits your program.
  283. You should also get your employer (if you work as a programmer) or
  284. your school, if any, to sign a "copyright disclaimer" for the
  285. program, if necessary. Here is a sample; alter the names:
  286. Yoyodyne, Inc., hereby disclaims all copyright
  287. interest in the program `Gnomovision'
  288. (which makes passes at compilers) written
  289. by James Hacker.
  290. signature of Ty Coon, 1 April 1989
  291. Ty Coon, President of Vice
  292. This General Public License does not permit incorporating your
  293. program into proprietary programs. If your program is a subroutine
  294. library, you may consider it more useful to permit linking
  295. proprietary applications with the library. If this is what you want
  296. to do, use the GNU Library General Public License instead of this
  297. License.
  298. ----------------------------------------------------------------------
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  304. questions to gnu@gnu.org.
  305. Copyright notice above.
  306. Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  307. MA 02111, USA
  308. Updated: 16 Feb 1998 tower