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19 <h2 class=
"appendix">GNU GENERAL PUBLIC LICENSE
</h2>
21 <div align=
"center">Version
2, June
1991</div>
22 <pre class=
"display"> Copyright
© 1989,
1991 Free Software Foundation, Inc.
23 59 Temple Place - Suite
330, Boston, MA
02111-
1307, USA
25 Everyone is permitted to copy and distribute verbatim copies
26 of this license document, but changing it is not allowed.
29 <h3 class=
"unnumberedsec">Preamble
</h3>
31 <p>The licenses for most software are designed to take away your
32 freedom to share and change it. By contrast, the GNU General Public
33 License is intended to guarantee your freedom to share and change free
34 software--to make sure the software is free for all its users. This
35 General Public License applies to most of the Free Software
36 Foundation's software and to any other program whose authors commit to
37 using it. (Some other Free Software Foundation software is covered by
38 the GNU Library General Public License instead.) You can apply it to
41 <p>When we speak of free software, we are referring to freedom, not
42 price. Our General Public Licenses are designed to make sure that you
43 have the freedom to distribute copies of free software (and charge for
44 this service if you wish), that you receive source code or can get it
45 if you want it, that you can change the software or use pieces of it
46 in new free programs; and that you know you can do these things.
48 <p>To protect your rights, we need to make restrictions that forbid
49 anyone to deny you these rights or to ask you to surrender the rights.
50 These restrictions translate to certain responsibilities for you if you
51 distribute copies of the software, or if you modify it.
53 <p>For example, if you distribute copies of such a program, whether
54 gratis or for a fee, you must give the recipients all the rights that
55 you have. You must make sure that they, too, receive or can get the
56 source code. And you must show them these terms so they know their
59 <p>We protect your rights with two steps: (
1) copyright the software, and
60 (
2) offer you this license which gives you legal permission to copy,
61 distribute and/or modify the software.
63 <p>Also, for each author's protection and ours, we want to make certain
64 that everyone understands that there is no warranty for this free
65 software. If the software is modified by someone else and passed on, we
66 want its recipients to know that what they have is not the original, so
67 that any problems introduced by others will not reflect on the original
70 <p>Finally, any free program is threatened constantly by software
71 patents. We wish to avoid the danger that redistributors of a free
72 program will individually obtain patent licenses, in effect making the
73 program proprietary. To prevent this, we have made it clear that any
74 patent must be licensed for everyone's free use or not licensed at all.
76 <p>The precise terms and conditions for copying, distribution and
79 <div align=
"center">TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
</div>
81 <li>This License applies to any program or other work which contains
82 a notice placed by the copyright holder saying it may be distributed
83 under the terms of this General Public License. The
"Program", below,
84 refers to any such program or work, and a
"work based on the Program"
85 means either the Program or any derivative work under copyright law:
86 that is to say, a work containing the Program or a portion of it,
87 either verbatim or with modifications and/or translated into another
88 language. (Hereinafter, translation is included without limitation in
89 the term
"modification".) Each licensee is addressed as
"you".
91 <p>Activities other than copying, distribution and modification are not
92 covered by this License; they are outside its scope. The act of
93 running the Program is not restricted, and the output from the Program
94 is covered only if its contents constitute a work based on the
95 Program (independent of having been made by running the Program).
96 Whether that is true depends on what the Program does.
98 </p><li>You may copy and distribute verbatim copies of the Program's
99 source code as you receive it, in any medium, provided that you
100 conspicuously and appropriately publish on each copy an appropriate
101 copyright notice and disclaimer of warranty; keep intact all the
102 notices that refer to this License and to the absence of any warranty;
103 and give any other recipients of the Program a copy of this License
104 along with the Program.
106 <p>You may charge a fee for the physical act of transferring a copy, and
107 you may at your option offer warranty protection in exchange for a fee.
109 </p><li>You may modify your copy or copies of the Program or any portion
110 of it, thus forming a work based on the Program, and copy and
111 distribute such modifications or work under the terms of Section
1
112 above, provided that you also meet all of these conditions:
115 <li>You must cause the modified files to carry prominent notices
116 stating that you changed the files and the date of any change.
118 <li>You must cause any work that you distribute or publish, that in
119 whole or in part contains or is derived from the Program or any
120 part thereof, to be licensed as a whole at no charge to all third
121 parties under the terms of this License.
123 <li>If the modified program normally reads commands interactively
124 when run, you must cause it, when started running for such
125 interactive use in the most ordinary way, to print or display an
126 announcement including an appropriate copyright notice and a
127 notice that there is no warranty (or else, saying that you provide
128 a warranty) and that users may redistribute the program under
129 these conditions, and telling the user how to view a copy of this
130 License. (Exception: if the Program itself is interactive but
131 does not normally print such an announcement, your work based on
132 the Program is not required to print an announcement.)
135 <p>These requirements apply to the modified work as a whole. If
136 identifiable sections of that work are not derived from the Program,
137 and can be reasonably considered independent and separate works in
138 themselves, then this License, and its terms, do not apply to those
139 sections when you distribute them as separate works. But when you
140 distribute the same sections as part of a whole which is a work based
141 on the Program, the distribution of the whole must be on the terms of
142 this License, whose permissions for other licensees extend to the
143 entire whole, and thus to each and every part regardless of who wrote it.
145 <p>Thus, it is not the intent of this section to claim rights or contest
146 your rights to work written entirely by you; rather, the intent is to
147 exercise the right to control the distribution of derivative or
148 collective works based on the Program.
150 <p>In addition, mere aggregation of another work not based on the Program
151 with the Program (or with a work based on the Program) on a volume of
152 a storage or distribution medium does not bring the other work under
153 the scope of this License.
155 </p><li>You may copy and distribute the Program (or a work based on it,
156 under Section
2) in object code or executable form under the terms of
157 Sections
1 and
2 above provided that you also do one of the following:
160 <li>Accompany it with the complete corresponding machine-readable
161 source code, which must be distributed under the terms of Sections
162 1 and
2 above on a medium customarily used for software interchange; or,
164 <li>Accompany it with a written offer, valid for at least three
165 years, to give any third party, for a charge no more than your
166 cost of physically performing source distribution, a complete
167 machine-readable copy of the corresponding source code, to be
168 distributed under the terms of Sections
1 and
2 above on a medium
169 customarily used for software interchange; or,
171 <li>Accompany it with the information you received as to the offer
172 to distribute corresponding source code. (This alternative is
173 allowed only for noncommercial distribution and only if you
174 received the program in object code or executable form with such
175 an offer, in accord with Subsection b above.)
178 <p>The source code for a work means the preferred form of the work for
179 making modifications to it. For an executable work, complete source
180 code means all the source code for all modules it contains, plus any
181 associated interface definition files, plus the scripts used to
182 control compilation and installation of the executable. However, as a
183 special exception, the source code distributed need not include
184 anything that is normally distributed (in either source or binary
185 form) with the major components (compiler, kernel, and so on) of the
186 operating system on which the executable runs, unless that component
187 itself accompanies the executable.
189 <p>If distribution of executable or object code is made by offering
190 access to copy from a designated place, then offering equivalent
191 access to copy the source code from the same place counts as
192 distribution of the source code, even though third parties are not
193 compelled to copy the source along with the object code.
195 </p><li>You may not copy, modify, sublicense, or distribute the Program
196 except as expressly provided under this License. Any attempt
197 otherwise to copy, modify, sublicense or distribute the Program is
198 void, and will automatically terminate your rights under this License.
199 However, parties who have received copies, or rights, from you under
200 this License will not have their licenses terminated so long as such
201 parties remain in full compliance.
203 <li>You are not required to accept this License, since you have not
204 signed it. However, nothing else grants you permission to modify or
205 distribute the Program or its derivative works. These actions are
206 prohibited by law if you do not accept this License. Therefore, by
207 modifying or distributing the Program (or any work based on the
208 Program), you indicate your acceptance of this License to do so, and
209 all its terms and conditions for copying, distributing or modifying
210 the Program or works based on it.
212 <li>Each time you redistribute the Program (or any work based on the
213 Program), the recipient automatically receives a license from the
214 original licensor to copy, distribute or modify the Program subject to
215 these terms and conditions. You may not impose any further
216 restrictions on the recipients' exercise of the rights granted herein.
217 You are not responsible for enforcing compliance by third parties to
220 <li>If, as a consequence of a court judgment or allegation of patent
221 infringement or for any other reason (not limited to patent issues),
222 conditions are imposed on you (whether by court order, agreement or
223 otherwise) that contradict the conditions of this License, they do not
224 excuse you from the conditions of this License. If you cannot
225 distribute so as to satisfy simultaneously your obligations under this
226 License and any other pertinent obligations, then as a consequence you
227 may not distribute the Program at all. For example, if a patent
228 license would not permit royalty-free redistribution of the Program by
229 all those who receive copies directly or indirectly through you, then
230 the only way you could satisfy both it and this License would be to
231 refrain entirely from distribution of the Program.
233 <p>If any portion of this section is held invalid or unenforceable under
234 any particular circumstance, the balance of the section is intended to
235 apply and the section as a whole is intended to apply in other
238 <p>It is not the purpose of this section to induce you to infringe any
239 patents or other property right claims or to contest validity of any
240 such claims; this section has the sole purpose of protecting the
241 integrity of the free software distribution system, which is
242 implemented by public license practices. Many people have made
243 generous contributions to the wide range of software distributed
244 through that system in reliance on consistent application of that
245 system; it is up to the author/donor to decide if he or she is willing
246 to distribute software through any other system and a licensee cannot
249 <p>This section is intended to make thoroughly clear what is believed to
250 be a consequence of the rest of this License.
252 </p><li>If the distribution and/or use of the Program is restricted in
253 certain countries either by patents or by copyrighted interfaces, the
254 original copyright holder who places the Program under this License
255 may add an explicit geographical distribution limitation excluding
256 those countries, so that distribution is permitted only in or among
257 countries not thus excluded. In such case, this License incorporates
258 the limitation as if written in the body of this License.
260 <li>The Free Software Foundation may publish revised and/or new versions
261 of the General Public License from time to time. Such new versions will
262 be similar in spirit to the present version, but may differ in detail to
263 address new problems or concerns.
265 <p>Each version is given a distinguishing version number. If the Program
266 specifies a version number of this License which applies to it and
"any
267 later version", you have the option of following the terms and conditions
268 either of that version or of any later version published by the Free
269 Software Foundation. If the Program does not specify a version number of
270 this License, you may choose any version ever published by the Free Software
273 </p><li>If you wish to incorporate parts of the Program into other free
274 programs whose distribution conditions are different, write to the author
275 to ask for permission. For software which is copyrighted by the Free
276 Software Foundation, write to the Free Software Foundation; we sometimes
277 make exceptions for this. Our decision will be guided by the two goals
278 of preserving the free status of all derivatives of our free software and
279 of promoting the sharing and reuse of software generally.
281 <div align=
"center">NO WARRANTY
</div>
283 <li>BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
284 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
285 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
286 PROVIDE THE PROGRAM
"AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
287 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
288 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
289 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
290 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
291 REPAIR OR CORRECTION.
293 <li>IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
294 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
295 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
296 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
297 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
298 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
299 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
300 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
301 POSSIBILITY OF SUCH DAMAGES.
304 <div align=
"center">END OF TERMS AND CONDITIONS
</div>
306 <h3 class=
"unnumberedsec">How to Apply These Terms to Your New Programs
</h3>
308 <p>If you develop a new program, and you want it to be of the greatest
309 possible use to the public, the best way to achieve this is to make it
310 free software which everyone can redistribute and change under these terms.
312 <p>To do so, attach the following notices to the program. It is safest
313 to attach them to the start of each source file to most effectively
314 convey the exclusion of warranty; and each file should have at least
315 the
"copyright" line and a pointer to where the full notice is found.
317 <pre class=
"smallexample"> <var>one line to give the program's name and a brief idea of what it does.
</var>
318 Copyright (C)
<var>year
</var> <var>name of author
</var>
320 This program is free software; you can redistribute it and/or modify
321 it under the terms of the GNU General Public License as published by
322 the Free Software Foundation; either version
2 of the License, or
323 (at your option) any later version.
325 This program is distributed in the hope that it will be useful,
326 but WITHOUT ANY WARRANTY; without even the implied warranty of
327 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
328 GNU General Public License for more details.
330 You should have received a copy of the GNU General Public License
331 along with this program; if not, write to the Free Software
332 Foundation, Inc.,
59 Temple Place - Suite
330,
333 Boston, MA
02111-
1307, USA.
336 <p>Also add information on how to contact you by electronic and paper mail.
338 <p>If the program is interactive, make it output a short notice like this
339 when it starts in an interactive mode:
341 <pre class=
"smallexample"> Gnomovision version
69, Copyright (C)
<var>year
</var> <var>name of author
</var>
342 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
344 This is free software, and you are welcome to redistribute it
345 under certain conditions; type `show c' for details.
348 <p>The hypothetical commands
<code>show w
</code> and
<code>show c
</code> should show
349 the appropriate parts of the General Public License. Of course, the
350 commands you use may be called something other than
<code>show w
</code> and
351 <code>show c
</code>; they could even be mouse-clicks or menu items--whatever
354 <p>You should also get your employer (if you work as a programmer) or your
355 school, if any, to sign a
"copyright disclaimer" for the program, if
356 necessary. Here is a sample; alter the names:
358 <pre class=
"smallexample"> Yoyodyne, Inc., hereby disclaims all copyright interest in the program
359 `Gnomovision' (which makes passes at compilers) written by James Hacker.
361 <var>signature of Ty Coon
</var>,
1 April
1989
362 Ty Coon, President of Vice
365 <p>This General Public License does not permit incorporating your program into
366 proprietary programs. If your program is a subroutine library, you may
367 consider it more useful to permit linking proprietary applications with the
368 library. If this is what you want to do, use the GNU Library General
369 Public License instead of this License.