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Revision: 1.1.1.1 (vendor branch)
Committed: Tue Dec 26 12:26:59 2000 UTC (15 years, 8 months ago) by mjhsieh
Branch: pre, MAIN
CVS Tags: current, HEAD_NEW, HEAD
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1 GNU General Public License
2
3 ----------------------------------------------------------------------------
4
5 Table of Contents
6
7 * GNU GENERAL PUBLIC LICENSE
8 o Preamble
9 o TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
10 o How to Apply These Terms to Your New Programs
11
12 ----------------------------------------------------------------------------
13
14 GNU GENERAL PUBLIC LICENSE
15
16 Version 2, June 1991
17
18 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
20
21 Everyone is permitted to copy and distribute verbatim copies
22 of this license document, but changing it is not allowed.
23
24 Preamble
25
26 The licenses for most software are designed to take away your freedom to
27 share and change it. By contrast, the GNU General Public License is intended
28 to guarantee your freedom to share and change free software--to make sure
29 the software is free for all its users. This General Public License applies
30 to most of the Free Software Foundation's software and to any other program
31 whose authors commit to using it. (Some other Free Software Foundation
32 software is covered by the GNU Library General Public License instead.) You
33 can apply it to your programs, too.
34
35 When we speak of free software, we are referring to freedom, not price. Our
36 General Public Licenses are designed to make sure that you have the freedom
37 to distribute copies of free software (and charge for this service if you
38 wish), that you receive source code or can get it if you want it, that you
39 can change the software or use pieces of it in new free programs; and that
40 you know you can do these things.
41
42 To protect your rights, we need to make restrictions that forbid anyone to
43 deny you these rights or to ask you to surrender the rights. These
44 restrictions translate to certain responsibilities for you if you distribute
45 copies of the software, or if you modify it.
46
47 For example, if you distribute copies of such a program, whether gratis or
48 for a fee, you must give the recipients all the rights that you have. You
49 must make sure that they, too, receive or can get the source code. And you
50 must show them these terms so they know their rights.
51
52 We protect your rights with two steps: (1) copyright the software, and (2)
53 offer you this license which gives you legal permission to copy, distribute
54 and/or modify the software.
55
56 Also, for each author's protection and ours, we want to make certain that
57 everyone understands that there is no warranty for this free software. If
58 the software is modified by someone else and passed on, we want its
59 recipients to know that what they have is not the original, so that any
60 problems introduced by others will not reflect on the original authors'
61 reputations.
62
63 Finally, any free program is threatened constantly by software patents. We
64 wish to avoid the danger that redistributors of a free program will
65 individually obtain patent licenses, in effect making the program
66 proprietary. To prevent this, we have made it clear that any patent must be
67 licensed for everyone's free use or not licensed at all.
68
69 The precise terms and conditions for copying, distribution and modification
70 follow.
71
72 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
73
74 0. This License applies to any program or other work which contains a notice
75 placed by the copyright holder saying it may be distributed under the terms
76 of this General Public License. The "Program", below, refers to any such
77 program or work, and a "work based on the Program" means either the Program
78 or any derivative work under copyright law: that is to say, a work
79 containing the Program or a portion of it, either verbatim or with
80 modifications and/or translated into another language. (Hereinafter,
81 translation is included without limitation in the term "modification".) Each
82 licensee is addressed as "you".
83
84 Activities other than copying, distribution and modification are not covered
85 by this License; they are outside its scope. The act of running the Program
86 is not restricted, and the output from the Program is covered only if its
87 contents constitute a work based on the Program (independent of having been
88 made by running the Program). Whether that is true depends on what the
89 Program does.
90
91 1. You may copy and distribute verbatim copies of the Program's source code
92 as you receive it, in any medium, provided that you conspicuously and
93 appropriately publish on each copy an appropriate copyright notice and
94 disclaimer of warranty; keep intact all the notices that refer to this
95 License and to the absence of any warranty; and give any other recipients of
96 the Program a copy of this License along with the Program.
97
98 You may charge a fee for the physical act of transferring a copy, and you
99 may at your option offer warranty protection in exchange for a fee.
100
101 2. You may modify your copy or copies of the Program or any portion of it,
102 thus forming a work based on the Program, and copy and distribute such
103 modifications or work under the terms of Section 1 above, provided that you
104 also meet all of these conditions:
105
106 * a) You must cause the modified files to carry prominent notices stating
107 that you changed the files and the date of any change.
108
109 * b) You must cause any work that you distribute or publish, that in
110 whole or in part contains or is derived from the Program or any part
111 thereof, to be licensed as a whole at no charge to all third parties
112 under the terms of this License.
113
114 * c) If the modified program normally reads commands interactively when
115 run, you must cause it, when started running for such interactive use
116 in the most ordinary way, to print or display an announcement including
117 an appropriate copyright notice and a notice that there is no warranty
118 (or else, saying that you provide a warranty) and that users may
119 redistribute the program under these conditions, and telling the user
120 how to view a copy of this License. (Exception: if the Program itself
121 is interactive but does not normally print such an announcement, your
122 work based on the Program is not required to print an announcement.)
123
124 These requirements apply to the modified work as a whole. If identifiable
125 sections of that work are not derived from the Program, and can be
126 reasonably considered independent and separate works in themselves, then
127 this License, and its terms, do not apply to those sections when you
128 distribute them as separate works. But when you distribute the same sections
129 as part of a whole which is a work based on the Program, the distribution of
130 the whole must be on the terms of this License, whose permissions for other
131 licensees extend to the entire whole, and thus to each and every part
132 regardless of who wrote it.
133
134 Thus, it is not the intent of this section to claim rights or contest your
135 rights to work written entirely by you; rather, the intent is to exercise
136 the right to control the distribution of derivative or collective works
137 based on the Program.
138
139 In addition, mere aggregation of another work not based on the Program with
140 the Program (or with a work based on the Program) on a volume of a storage
141 or distribution medium does not bring the other work under the scope of this
142 License.
143
144 3. You may copy and distribute the Program (or a work based on it, under
145 Section 2) in object code or executable form under the terms of Sections 1
146 and 2 above provided that you also do one of the following:
147
148 * a) Accompany it with the complete corresponding machine-readable source
149 code, which must be distributed under the terms of Sections 1 and 2
150 above on a medium customarily used for software interchange; or,
151
152 * b) Accompany it with a written offer, valid for at least three years,
153 to give any third party, for a charge no more than your cost of
154 physically performing source distribution, a complete machine-readable
155 copy of the corresponding source code, to be distributed under the
156 terms of Sections 1 and 2 above on a medium customarily used for
157 software interchange; or,
158
159 * c) Accompany it with the information you received as to the offer to
160 distribute corresponding source code. (This alternative is allowed only
161 for noncommercial distribution and only if you received the program in
162 object code or executable form with such an offer, in accord with
163 Subsection b above.)
164
165 The source code for a work means the preferred form of the work for making
166 modifications to it. For an executable work, complete source code means all
167 the source code for all modules it contains, plus any associated interface
168 definition files, plus the scripts used to control compilation and
169 installation of the executable. However, as a special exception, the source
170 code distributed need not include anything that is normally distributed (in
171 either source or binary form) with the major components (compiler, kernel,
172 and so on) of the operating system on which the executable runs, unless that
173 component itself accompanies the executable.
174
175 If distribution of executable or object code is made by offering access to
176 copy from a designated place, then offering equivalent access to copy the
177 source code from the same place counts as distribution of the source code,
178 even though third parties are not compelled to copy the source along with
179 the object code.
180
181 4. You may not copy, modify, sublicense, or distribute the Program except as
182 expressly provided under this License. Any attempt otherwise to copy,
183 modify, sublicense or distribute the Program is void, and will automatically
184 terminate your rights under this License. However, parties who have received
185 copies, or rights, from you under this License will not have their licenses
186 terminated so long as such parties remain in full compliance.
187
188 5. You are not required to accept this License, since you have not signed
189 it. However, nothing else grants you permission to modify or distribute the
190 Program or its derivative works. These actions are prohibited by law if you
191 do not accept this License. Therefore, by modifying or distributing the
192 Program (or any work based on the Program), you indicate your acceptance of
193 this License to do so, and all its terms and conditions for copying,
194 distributing or modifying the Program or works based on it.
195
196 6. Each time you redistribute the Program (or any work based on the
197 Program), the recipient automatically receives a license from the original
198 licensor to copy, distribute or modify the Program subject to these terms
199 and conditions. You may not impose any further restrictions on the
200 recipients' exercise of the rights granted herein. You are not responsible
201 for enforcing compliance by third parties to this License.
202
203 7. If, as a consequence of a court judgment or allegation of patent
204 infringement or for any other reason (not limited to patent issues),
205 conditions are imposed on you (whether by court order, agreement or
206 otherwise) that contradict the conditions of this License, they do not
207 excuse you from the conditions of this License. If you cannot distribute so
208 as to satisfy simultaneously your obligations under this License and any
209 other pertinent obligations, then as a consequence you may not distribute
210 the Program at all. For example, if a patent license would not permit
211 royalty-free redistribution of the Program by all those who receive copies
212 directly or indirectly through you, then the only way you could satisfy both
213 it and this License would be to refrain entirely from distribution of the
214 Program.
215
216 If any portion of this section is held invalid or unenforceable under any
217 particular circumstance, the balance of the section is intended to apply and
218 the section as a whole is intended to apply in other circumstances.
219
220 It is not the purpose of this section to induce you to infringe any patents
221 or other property right claims or to contest validity of any such claims;
222 this section has the sole purpose of protecting the integrity of the free
223 software distribution system, which is implemented by public license
224 practices. Many people have made generous contributions to the wide range of
225 software distributed through that system in reliance on consistent
226 application of that system; it is up to the author/donor to decide if he or
227 she is willing to distribute software through any other system and a
228 licensee cannot impose that choice.
229
230 This section is intended to make thoroughly clear what is believed to be a
231 consequence of the rest of this License.
232
233 8. If the distribution and/or use of the Program is restricted in certain
234 countries either by patents or by copyrighted interfaces, the original
235 copyright holder who places the Program under this License may add an
236 explicit geographical distribution limitation excluding those countries, so
237 that distribution is permitted only in or among countries not thus excluded.
238 In such case, this License incorporates the limitation as if written in the
239 body of this License.
240
241 9. The Free Software Foundation may publish revised and/or new versions of
242 the General Public License from time to time. Such new versions will be
243 similar in spirit to the present version, but may differ in detail to
244 address new problems or concerns.
245
246 Each version is given a distinguishing version number. If the Program
247 specifies a version number of this License which applies to it and "any
248 later version", you have the option of following the terms and conditions
249 either of that version or of any later version published by the Free
250 Software Foundation. If the Program does not specify a version number of
251 this License, you may choose any version ever published by the Free Software
252 Foundation.
253
254 10. If you wish to incorporate parts of the Program into other free programs
255 whose distribution conditions are different, write to the author to ask for
256 permission. For software which is copyrighted by the Free Software
257 Foundation, write to the Free Software Foundation; we sometimes make
258 exceptions for this. Our decision will be guided by the two goals of
259 preserving the free status of all derivatives of our free software and of
260 promoting the sharing and reuse of software generally.
261
262 NO WARRANTY
263
264 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR
265 THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
266 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
267 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
268 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
269 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO
270 THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM
271 PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
272 CORRECTION.
273
274 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
275 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
276 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
277 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
278 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO
279 LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR
280 THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
281 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
282 POSSIBILITY OF SUCH DAMAGES.
283
284 END OF TERMS AND CONDITIONS
285
286 How to Apply These Terms to Your New Programs
287
288 If you develop a new program, and you want it to be of the greatest possible
289 use to the public, the best way to achieve this is to make it free software
290 which everyone can redistribute and change under these terms.
291
292 To do so, attach the following notices to the program. It is safest to
293 attach them to the start of each source file to most effectively convey the
294 exclusion of warranty; and each file should have at least the "copyright"
295 line and a pointer to where the full notice is found.
296
297 one line to give the program's name and an idea of what it does.
298 Copyright (C) 19yy name of author
299
300 This program is free software; you can redistribute it and/or
301 modify it under the terms of the GNU General Public License
302 as published by the Free Software Foundation; either version 2
303 of the License, or (at your option) any later version.
304
305 This program is distributed in the hope that it will be useful,
306 but WITHOUT ANY WARRANTY; without even the implied warranty of
307 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
308 GNU General Public License for more details.
309
310 You should have received a copy of the GNU General Public License
311 along with this program; if not, write to the Free Software
312 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
313
314 Also add information on how to contact you by electronic and paper mail.
315
316 If the program is interactive, make it output a short notice like this when
317 it starts in an interactive mode:
318
319 Gnomovision version 69, Copyright (C) 19yy name of author
320 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
321 type `show w'. This is free software, and you are welcome
322 to redistribute it under certain conditions; type `show c'
323 for details.
324
325 The hypothetical commands `show w' and `show c' should show the appropriate
326 parts of the General Public License. Of course, the commands you use may be
327 called something other than `show w' and `show c'; they could even be
328 mouse-clicks or menu items--whatever suits your program.
329
330 You should also get your employer (if you work as a programmer) or your
331 school, if any, to sign a "copyright disclaimer" for the program, if
332 necessary. Here is a sample; alter the names:
333
334 Yoyodyne, Inc., hereby disclaims all copyright
335 interest in the program `Gnomovision'
336 (which makes passes at compilers) written
337 by James Hacker.
338
339 signature of Ty Coon, 1 April 1989
340 Ty Coon, President of Vice
341
342 This General Public License does not permit incorporating your program into
343 proprietary programs. If your program is a subroutine library, you may
344 consider it more useful to permit linking proprietary applications with the
345 library. If this is what you want to do, use the GNU Library General Public
346 License instead of this License.