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1 | |
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2 | GNU GENERAL PUBLIC LICENSE |
3 | Version 1, February 1989 |
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4 | |
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5 | Copyright (C) 1989 Free Software Foundation, Inc. |
6 | 675 Mass Ave, Cambridge, MA 02139, USA |
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7 | Everyone is permitted to copy and distribute verbatim copies |
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8 | of this license document, but changing it is not allowed. |
9 | |
10 | Preamble |
11 | |
12 | The license agreements of most software companies try to keep users |
13 | at the mercy of those companies. By contrast, our General Public |
14 | License is intended to guarantee your freedom to share and change free |
15 | software--to make sure the software is free for all its users. The |
16 | General Public License applies to the Free Software Foundation's |
17 | software and to any other program whose authors commit to using it. |
18 | You can use it for your programs, too. |
19 | |
20 | When we speak of free software, we are referring to freedom, not |
21 | price. Specifically, the General Public License is designed to make |
22 | sure that you have the freedom to give away or sell copies of free |
23 | software, that you receive source code or can get it if you want it, |
24 | that you can change the software or use pieces of it in new free |
25 | programs; and that you know you can do these things. |
26 | |
27 | To protect your rights, we need to make restrictions that forbid |
28 | anyone to deny you these rights or to ask you to surrender the rights. |
29 | These restrictions translate to certain responsibilities for you if you |
30 | distribute copies of the software, or if you modify it. |
31 | |
32 | For example, if you distribute copies of a such a program, whether |
33 | gratis or for a fee, you must give the recipients all the rights that |
34 | you have. You must make sure that they, too, receive or can get the |
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35 | source code. And you must tell them their rights. |
36 | |
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37 | We protect your rights with two steps: (1) copyright the software, and |
38 | (2) offer you this license which gives you legal permission to copy, |
39 | distribute and/or modify the software. |
40 | |
41 | Also, for each author's protection and ours, we want to make certain |
42 | that everyone understands that there is no warranty for this free |
43 | software. If the software is modified by someone else and passed on, we |
44 | want its recipients to know that what they have is not the original, so |
45 | that any problems introduced by others will not reflect on the original |
46 | authors' reputations. |
47 | |
48 | The precise terms and conditions for copying, distribution and |
49 | modification follow. |
50 | \f |
51 | GNU GENERAL PUBLIC LICENSE |
52 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION |
53 | |
54 | 0. This License Agreement applies to any program or other work which |
55 | contains a notice placed by the copyright holder saying it may be |
56 | distributed under the terms of this General Public License. The |
57 | "Program", below, refers to any such program or work, and a "work based |
58 | on the Program" means either the Program or any work containing the |
59 | Program or a portion of it, either verbatim or with modifications. Each |
60 | licensee is addressed as "you". |
61 | |
62 | 1. You may copy and distribute verbatim copies of the Program's source |
63 | code as you receive it, in any medium, provided that you conspicuously and |
64 | appropriately publish on each copy an appropriate copyright notice and |
65 | disclaimer of warranty; keep intact all the notices that refer to this |
66 | General Public License and to the absence of any warranty; and give any |
67 | other recipients of the Program a copy of this General Public License |
68 | along with the Program. You may charge a fee for the physical act of |
69 | transferring a copy. |
70 | |
71 | 2. You may modify your copy or copies of the Program or any portion of |
72 | it, and copy and distribute such modifications under the terms of Paragraph |
73 | 1 above, provided that you also do the following: |
74 | |
75 | a) cause the modified files to carry prominent notices stating that |
76 | you changed the files and the date of any change; and |
77 | |
78 | b) cause the whole of any work that you distribute or publish, that |
79 | in whole or in part contains the Program or any part thereof, either |
80 | with or without modifications, to be licensed at no charge to all |
81 | third parties under the terms of this General Public License (except |
82 | that you may choose to grant warranty protection to some or all |
83 | third parties, at your option). |
84 | |
85 | c) If the modified program normally reads commands interactively when |
86 | run, you must cause it, when started running for such interactive use |
87 | in the simplest and most usual way, to print or display an |
88 | announcement including an appropriate copyright notice and a notice |
89 | that there is no warranty (or else, saying that you provide a |
90 | warranty) and that users may redistribute the program under these |
91 | conditions, and telling the user how to view a copy of this General |
92 | Public License. |
93 | |
94 | d) You may charge a fee for the physical act of transferring a |
95 | copy, and you may at your option offer warranty protection in |
96 | exchange for a fee. |
97 | |
98 | Mere aggregation of another independent work with the Program (or its |
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99 | derivative) on a volume of a storage or distribution medium does not bring |
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100 | the other work under the scope of these terms. |
101 | \f |
102 | 3. You may copy and distribute the Program (or a portion or derivative of |
103 | it, under Paragraph 2) in object code or executable form under the terms of |
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104 | Paragraphs 1 and 2 above provided that you also do one of the following: |
105 | |
106 | a) accompany it with the complete corresponding machine-readable |
107 | source code, which must be distributed under the terms of |
108 | Paragraphs 1 and 2 above; or, |
109 | |
110 | b) accompany it with a written offer, valid for at least three |
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111 | years, to give any third party free (except for a nominal charge |
112 | for the cost of distribution) a complete machine-readable copy of the |
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113 | corresponding source code, to be distributed under the terms of |
114 | Paragraphs 1 and 2 above; or, |
115 | |
116 | c) accompany it with the information you received as to where the |
117 | corresponding source code may be obtained. (This alternative is |
118 | allowed only for noncommercial distribution and only if you |
119 | received the program in object code or executable form alone.) |
120 | |
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121 | Source code for a work means the preferred form of the work for making |
122 | modifications to it. For an executable file, complete source code means |
123 | all the source code for all modules it contains; but, as a special |
124 | exception, it need not include source code for modules which are standard |
125 | libraries that accompany the operating system on which the executable |
126 | file runs, or for standard header files or definitions files that |
127 | accompany that operating system. |
128 | |
129 | 4. You may not copy, modify, sublicense, distribute or transfer the |
130 | Program except as expressly provided under this General Public License. |
131 | Any attempt otherwise to copy, modify, sublicense, distribute or transfer |
132 | the Program is void, and will automatically terminate your rights to use |
133 | the Program under this License. However, parties who have received |
134 | copies, or rights to use copies, from you under this General Public |
135 | License will not have their licenses terminated so long as such parties |
136 | remain in full compliance. |
137 | |
138 | 5. By copying, distributing or modifying the Program (or any work based |
139 | on the Program) you indicate your acceptance of this license to do so, |
140 | and all its terms and conditions. |
141 | |
142 | 6. Each time you redistribute the Program (or any work based on the |
143 | Program), the recipient automatically receives a license from the original |
144 | licensor to copy, distribute or modify the Program subject to these |
145 | terms and conditions. You may not impose any further restrictions on the |
146 | recipients' exercise of the rights granted herein. |
147 | \f |
148 | 7. The Free Software Foundation may publish revised and/or new versions |
149 | of the General Public License from time to time. Such new versions will |
150 | be similar in spirit to the present version, but may differ in detail to |
151 | address new problems or concerns. |
152 | |
153 | Each version is given a distinguishing version number. If the Program |
154 | specifies a version number of the license which applies to it and "any |
155 | later version", you have the option of following the terms and conditions |
156 | either of that version or of any later version published by the Free |
157 | Software Foundation. If the Program does not specify a version number of |
158 | the license, you may choose any version ever published by the Free Software |
159 | Foundation. |
160 | |
161 | 8. If you wish to incorporate parts of the Program into other free |
162 | programs whose distribution conditions are different, write to the author |
163 | to ask for permission. For software which is copyrighted by the Free |
164 | Software Foundation, write to the Free Software Foundation; we sometimes |
165 | make exceptions for this. Our decision will be guided by the two goals |
166 | of preserving the free status of all derivatives of our free software and |
167 | of promoting the sharing and reuse of software generally. |
168 | |
169 | NO WARRANTY |
170 | |
171 | 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
172 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN |
173 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES |
174 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED |
175 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
176 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS |
177 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE |
178 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, |
179 | REPAIR OR CORRECTION. |
180 | |
181 | 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
182 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
183 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, |
184 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING |
185 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED |
186 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY |
187 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER |
188 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE |
189 | POSSIBILITY OF SUCH DAMAGES. |
190 | |
191 | END OF TERMS AND CONDITIONS |
192 | \f |
193 | Appendix: How to Apply These Terms to Your New Programs |
194 | |
195 | If you develop a new program, and you want it to be of the greatest |
196 | possible use to humanity, the best way to achieve this is to make it |
197 | free software which everyone can redistribute and change under these |
198 | terms. |
199 | |
200 | To do so, attach the following notices to the program. It is safest to |
201 | attach them to the start of each source file to most effectively convey |
202 | the exclusion of warranty; and each file should have at least the |
203 | "copyright" line and a pointer to where the full notice is found. |
204 | |
205 | <one line to give the program's name and a brief idea of what it does.> |
206 | Copyright (C) 19yy <name of author> |
207 | |
208 | This program is free software; you can redistribute it and/or modify |
209 | it under the terms of the GNU General Public License as published by |
210 | the Free Software Foundation; either version 1, or (at your option) |
211 | any later version. |
212 | |
213 | This program is distributed in the hope that it will be useful, |
214 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
215 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
216 | GNU General Public License for more details. |
217 | |
218 | You should have received a copy of the GNU General Public License |
219 | along with this program; if not, write to the Free Software |
220 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
221 | |
222 | Also add information on how to contact you by electronic and paper mail. |
223 | |
224 | If the program is interactive, make it output a short notice like this |
225 | when it starts in an interactive mode: |
226 | |
227 | Gnomovision version 69, Copyright (C) 19xx name of author |
228 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. |
229 | This is free software, and you are welcome to redistribute it |
230 | under certain conditions; type `show c' for details. |
231 | |
232 | The hypothetical commands `show w' and `show c' should show the |
233 | appropriate parts of the General Public License. Of course, the |
234 | commands you use may be called something other than `show w' and `show |
235 | c'; they could even be mouse-clicks or menu items--whatever suits your |
236 | program. |
237 | |
238 | You should also get your employer (if you work as a programmer) or your |
239 | school, if any, to sign a "copyright disclaimer" for the program, if |
240 | necessary. Here a sample; alter the names: |
241 | |
242 | Yoyodyne, Inc., hereby disclaims all copyright interest in the |
243 | program `Gnomovision' (a program to direct compilers to make passes |
244 | at assemblers) written by James Hacker. |
245 | |
246 | <signature of Ty Coon>, 1 April 1989 |
247 | Ty Coon, President of Vice |
248 | |
249 | That's all there is to it! |