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1 | =pod |
2 | |
3 | =head1 GNU GENERAL PUBLIC LICENSE |
4 | |
5 | This document includes the GNU General Public License, one of the two |
6 | alternatives licenses under which Perl can be redistributed and/or |
7 | modified. See also the Perl Artistic License L<perlartistic>. |
8 | |
9 | =head2 The License Text |
10 | |
11 | GNU GENERAL PUBLIC LICENSE |
12 | Version 1, February 1989 |
13 | |
14 | Copyright (C) 1989 Free Software Foundation, Inc. |
15 | 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
16 | Everyone is permitted to copy and distribute verbatim copies |
17 | of this license document, but changing it is not allowed. |
18 | |
19 | Preamble |
20 | |
21 | The license agreements of most software companies try to keep users |
22 | at the mercy of those companies. By contrast, our General Public |
23 | License is intended to guarantee your freedom to share and change free |
24 | software--to make sure the software is free for all its users. The |
25 | General Public License applies to the Free Software Foundation's |
26 | software and to any other program whose authors commit to using it. |
27 | You can use it for your programs, too. |
28 | |
29 | When we speak of free software, we are referring to freedom, not |
30 | price. Specifically, the General Public License is designed to make |
31 | sure that you have the freedom to give away or sell copies of free |
32 | software, that you receive source code or can get it if you want it, |
33 | that you can change the software or use pieces of it in new free |
34 | programs; and that you know you can do these things. |
35 | |
36 | To protect your rights, we need to make restrictions that forbid |
37 | anyone to deny you these rights or to ask you to surrender the rights. |
38 | These restrictions translate to certain responsibilities for you if you |
39 | distribute copies of the software, or if you modify it. |
40 | |
41 | For example, if you distribute copies of a such a program, whether |
42 | gratis or for a fee, you must give the recipients all the rights that |
43 | you have. You must make sure that they, too, receive or can get the |
44 | source code. And you must tell them their rights. |
45 | |
46 | We protect your rights with two steps: (1) copyright the software, and |
47 | (2) offer you this license which gives you legal permission to copy, |
48 | distribute and/or modify the software. |
49 | |
50 | Also, for each author's protection and ours, we want to make certain |
51 | that everyone understands that there is no warranty for this free |
52 | software. If the software is modified by someone else and passed on, we |
53 | want its recipients to know that what they have is not the original, so |
54 | that any problems introduced by others will not reflect on the original |
55 | authors' reputations. |
56 | |
57 | The precise terms and conditions for copying, distribution and |
58 | modification follow. |
59 | |
60 | GNU GENERAL PUBLIC LICENSE |
61 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION |
62 | |
63 | 0. This License Agreement applies to any program or other work which |
64 | contains a notice placed by the copyright holder saying it may be |
65 | distributed under the terms of this General Public License. The |
66 | "Program", below, refers to any such program or work, and a "work based |
67 | on the Program" means either the Program or any work containing the |
68 | Program or a portion of it, either verbatim or with modifications. Each |
69 | licensee is addressed as "you". |
70 | |
71 | 1. You may copy and distribute verbatim copies of the Program's source |
72 | code as you receive it, in any medium, provided that you conspicuously and |
73 | appropriately publish on each copy an appropriate copyright notice and |
74 | disclaimer of warranty; keep intact all the notices that refer to this |
75 | General Public License and to the absence of any warranty; and give any |
76 | other recipients of the Program a copy of this General Public License |
77 | along with the Program. You may charge a fee for the physical act of |
78 | transferring a copy. |
79 | |
80 | 2. You may modify your copy or copies of the Program or any portion of |
81 | it, and copy and distribute such modifications under the terms of Paragraph |
82 | 1 above, provided that you also do the following: |
83 | |
84 | a) cause the modified files to carry prominent notices stating that |
85 | you changed the files and the date of any change; and |
86 | |
87 | b) cause the whole of any work that you distribute or publish, that |
88 | in whole or in part contains the Program or any part thereof, either |
89 | with or without modifications, to be licensed at no charge to all |
90 | third parties under the terms of this General Public License (except |
91 | that you may choose to grant warranty protection to some or all |
92 | third parties, at your option). |
93 | |
94 | c) If the modified program normally reads commands interactively when |
95 | run, you must cause it, when started running for such interactive use |
96 | in the simplest and most usual way, to print or display an |
97 | announcement including an appropriate copyright notice and a notice |
98 | that there is no warranty (or else, saying that you provide a |
99 | warranty) and that users may redistribute the program under these |
100 | conditions, and telling the user how to view a copy of this General |
101 | Public License. |
102 | |
103 | d) You may charge a fee for the physical act of transferring a |
104 | copy, and you may at your option offer warranty protection in |
105 | exchange for a fee. |
106 | |
107 | Mere aggregation of another independent work with the Program (or its |
108 | derivative) on a volume of a storage or distribution medium does not bring |
109 | the other work under the scope of these terms. |
110 | |
111 | 3. You may copy and distribute the Program (or a portion or derivative of |
112 | it, under Paragraph 2) in object code or executable form under the terms of |
113 | Paragraphs 1 and 2 above provided that you also do one of the following: |
114 | |
115 | a) accompany it with the complete corresponding machine-readable |
116 | source code, which must be distributed under the terms of |
117 | Paragraphs 1 and 2 above; or, |
118 | |
119 | b) accompany it with a written offer, valid for at least three |
120 | years, to give any third party free (except for a nominal charge |
121 | for the cost of distribution) a complete machine-readable copy of the |
122 | corresponding source code, to be distributed under the terms of |
123 | Paragraphs 1 and 2 above; or, |
124 | |
125 | c) accompany it with the information you received as to where the |
126 | corresponding source code may be obtained. (This alternative is |
127 | allowed only for noncommercial distribution and only if you |
128 | received the program in object code or executable form alone.) |
129 | |
130 | Source code for a work means the preferred form of the work for making |
131 | modifications to it. For an executable file, complete source code means |
132 | all the source code for all modules it contains; but, as a special |
133 | exception, it need not include source code for modules which are standard |
134 | libraries that accompany the operating system on which the executable |
135 | file runs, or for standard header files or definitions files that |
136 | accompany that operating system. |
137 | |
138 | 4. You may not copy, modify, sublicense, distribute or transfer the |
139 | Program except as expressly provided under this General Public License. |
140 | Any attempt otherwise to copy, modify, sublicense, distribute or transfer |
141 | the Program is void, and will automatically terminate your rights to use |
142 | the Program under this License. However, parties who have received |
143 | copies, or rights to use copies, from you under this General Public |
144 | License will not have their licenses terminated so long as such parties |
145 | remain in full compliance. |
146 | |
147 | 5. By copying, distributing or modifying the Program (or any work based |
148 | on the Program) you indicate your acceptance of this license to do so, |
149 | and all its terms and conditions. |
150 | |
151 | 6. Each time you redistribute the Program (or any work based on the |
152 | Program), the recipient automatically receives a license from the original |
153 | licensor to copy, distribute or modify the Program subject to these |
154 | terms and conditions. You may not impose any further restrictions on the |
155 | recipients' exercise of the rights granted herein. |
156 | |
157 | 7. The Free Software Foundation may publish revised and/or new versions |
158 | of the General Public License from time to time. Such new versions will |
159 | be similar in spirit to the present version, but may differ in detail to |
160 | address new problems or concerns. |
161 | |
162 | Each version is given a distinguishing version number. If the Program |
163 | specifies a version number of the license which applies to it and "any |
164 | later version", you have the option of following the terms and conditions |
165 | either of that version or of any later version published by the Free |
166 | Software Foundation. If the Program does not specify a version number of |
167 | the license, you may choose any version ever published by the Free Software |
168 | Foundation. |
169 | |
170 | 8. If you wish to incorporate parts of the Program into other free |
171 | programs whose distribution conditions are different, write to the author |
172 | to ask for permission. For software which is copyrighted by the Free |
173 | Software Foundation, write to the Free Software Foundation; we sometimes |
174 | make exceptions for this. Our decision will be guided by the two goals |
175 | of preserving the free status of all derivatives of our free software and |
176 | of promoting the sharing and reuse of software generally. |
177 | |
178 | NO WARRANTY |
179 | |
180 | 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
181 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN |
182 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES |
183 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED |
184 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
185 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS |
186 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE |
187 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, |
188 | REPAIR OR CORRECTION. |
189 | |
190 | 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
191 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
192 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, |
193 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING |
194 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED |
195 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY |
196 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER |
197 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE |
198 | POSSIBILITY OF SUCH DAMAGES. |
199 | |
200 | END OF TERMS AND CONDITIONS |
201 | |
202 | Appendix: How to Apply These Terms to Your New Programs |
203 | |
204 | If you develop a new program, and you want it to be of the greatest |
205 | possible use to humanity, the best way to achieve this is to make it |
206 | free software which everyone can redistribute and change under these |
207 | terms. |
208 | |
209 | To do so, attach the following notices to the program. It is safest to |
210 | attach them to the start of each source file to most effectively convey |
211 | the exclusion of warranty; and each file should have at least the |
212 | "copyright" line and a pointer to where the full notice is found. |
213 | |
214 | <one line to give the program's name and a brief idea of what it does.> |
215 | Copyright (C) 19yy <name of author> |
216 | |
217 | This program is free software; you can redistribute it and/or modify |
218 | it under the terms of the GNU General Public License as published by |
219 | the Free Software Foundation; either version 1, or (at your option) |
220 | any later version. |
221 | |
222 | This program is distributed in the hope that it will be useful, |
223 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
224 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
225 | GNU General Public License for more details. |
226 | |
227 | You should have received a copy of the GNU General Public License |
228 | along with this program; if not, write to the Free Software Foundation, |
229 | Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
230 | |
231 | Also add information on how to contact you by electronic and paper mail. |
232 | |
233 | If the program is interactive, make it output a short notice like this |
234 | when it starts in an interactive mode: |
235 | |
236 | Gnomovision version 69, Copyright (C) 19xx name of author |
237 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. |
238 | This is free software, and you are welcome to redistribute it |
239 | under certain conditions; type `show c' for details. |
240 | |
241 | The hypothetical commands `show w' and `show c' should show the |
242 | appropriate parts of the General Public License. Of course, the |
243 | commands you use may be called something other than `show w' and `show |
244 | c'; they could even be mouse-clicks or menu items--whatever suits your |
245 | program. |
246 | |
247 | You should also get your employer (if you work as a programmer) or your |
248 | school, if any, to sign a "copyright disclaimer" for the program, if |
249 | necessary. Here a sample; alter the names: |
250 | |
251 | Yoyodyne, Inc., hereby disclaims all copyright interest in the |
252 | program `Gnomovision' (a program to direct compilers to make passes |
253 | at assemblers) written by James Hacker. |
254 | |
255 | <signature of Ty Coon>, 1 April 1989 |
256 | Ty Coon, President of Vice |
257 | |
258 | That's all there is to it! |
259 | |
260 | =cut |