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1 | GNU GENERAL PUBLIC LICENSE | ||
2 | Version 3, 29 June 2007 | ||
3 | |||
4 | Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> | ||
5 | Everyone is permitted to copy and distribute verbatim copies | ||
6 | of this license document, but changing it is not allowed. | ||
7 | |||
8 | Preamble | ||
9 | |||
10 | The GNU General Public License is a free, copyleft license for | ||
11 | software and other kinds of works. | ||
12 | |||
13 | The licenses for most software and other practical works are designed | ||
14 | to take away your freedom to share and change the works. By contrast, | ||
15 | the GNU General Public License is intended to guarantee your freedom to | ||
16 | share and change all versions of a program--to make sure it remains free | ||
17 | software for all its users. We, the Free Software Foundation, use the | ||
18 | GNU General Public License for most of our software; it applies also to | ||
19 | any other work released this way by its authors. You can apply it to | ||
20 | your programs, too. | ||
21 | |||
22 | When we speak of free software, we are referring to freedom, not | ||
23 | price. Our General Public Licenses are designed to make sure that you | ||
24 | have the freedom to distribute copies of free software (and charge for | ||
25 | them if you wish), that you receive source code or can get it if you | ||
26 | want it, that you can change the software or use pieces of it in new | ||
27 | free programs, and that you know you can do these things. | ||
28 | |||
29 | To protect your rights, we need to prevent others from denying you | ||
30 | these rights or asking you to surrender the rights. Therefore, you have | ||
31 | certain responsibilities if you distribute copies of the software, or if | ||
32 | you modify it: responsibilities to respect the freedom of others. | ||
33 | |||
34 | For example, if you distribute copies of such a program, whether | ||
35 | gratis or for a fee, you must pass on to the recipients the same | ||
36 | freedoms that you received. You must make sure that they, too, receive | ||
37 | or can get the source code. And you must show them these terms so they | ||
38 | know their rights. | ||
39 | |||
40 | Developers that use the GNU GPL protect your rights with two steps: | ||
41 | (1) assert copyright on the software, and (2) offer you this License | ||
42 | giving you legal permission to copy, distribute and/or modify it. | ||
43 | |||
44 | For the developers' and authors' protection, the GPL clearly explains | ||
45 | that there is no warranty for this free software. For both users' and | ||
46 | authors' sake, the GPL requires that modified versions be marked as | ||
47 | changed, so that their problems will not be attributed erroneously to | ||
48 | authors of previous versions. | ||
49 | |||
50 | Some devices are designed to deny users access to install or run | ||
51 | modified versions of the software inside them, although the manufacturer | ||
52 | can do so. This is fundamentally incompatible with the aim of | ||
53 | protecting users' freedom to change the software. The systematic | ||
54 | pattern of such abuse occurs in the area of products for individuals to | ||
55 | use, which is precisely where it is most unacceptable. Therefore, we | ||
56 | have designed this version of the GPL to prohibit the practice for those | ||
57 | products. If such problems arise substantially in other domains, we | ||
58 | stand ready to extend this provision to those domains in future versions | ||
59 | of the GPL, as needed to protect the freedom of users. | ||
60 | |||
61 | Finally, every program is threatened constantly by software patents. | ||
62 | States should not allow patents to restrict development and use of | ||
63 | software on general-purpose computers, but in those that do, we wish to | ||
64 | avoid the special danger that patents applied to a free program could | ||
65 | make it effectively proprietary. To prevent this, the GPL assures that | ||
66 | patents cannot be used to render the program non-free. | ||
67 | |||
68 | The precise terms and conditions for copying, distribution and | ||
69 | modification follow. | ||
70 | |||
71 | TERMS AND CONDITIONS | ||
72 | |||
73 | 0. Definitions. | ||
74 | |||
75 | "This License" refers to version 3 of the GNU General Public License. | ||
76 | |||
77 | "Copyright" also means copyright-like laws that apply to other kinds of | ||
78 | works, such as semiconductor masks. | ||
79 | |||
80 | "The Program" refers to any copyrightable work licensed under this | ||
81 | License. Each licensee is addressed as "you". "Licensees" and | ||
82 | "recipients" may be individuals or organizations. | ||
83 | |||
84 | To "modify" a work means to copy from or adapt all or part of the work | ||
85 | in a fashion requiring copyright permission, other than the making of an | ||
86 | exact copy. The resulting work is called a "modified version" of the | ||
87 | earlier work or a work "based on" the earlier work. | ||
88 | |||
89 | A "covered work" means either the unmodified Program or a work based | ||
90 | on the Program. | ||
91 | |||
92 | To "propagate" a work means to do anything with it that, without | ||
93 | permission, would make you directly or secondarily liable for | ||
94 | infringement under applicable copyright law, except executing it on a | ||
95 | computer or modifying a private copy. Propagation includes copying, | ||
96 | distribution (with or without modification), making available to the | ||
97 | public, and in some countries other activities as well. | ||
98 | |||
99 | To "convey" a work means any kind of propagation that enables other | ||
100 | parties to make or receive copies. Mere interaction with a user through | ||
101 | a computer network, with no transfer of a copy, is not conveying. | ||
102 | |||
103 | An interactive user interface displays "Appropriate Legal Notices" | ||
104 | to the extent that it includes a convenient and prominently visible | ||
105 | feature that (1) displays an appropriate copyright notice, and (2) | ||
106 | tells the user that there is no warranty for the work (except to the | ||
107 | extent that warranties are provided), that licensees may convey the | ||
108 | work under this License, and how to view a copy of this License. If | ||
109 | the interface presents a list of user commands or options, such as a | ||
110 | menu, a prominent item in the list meets this criterion. | ||
111 | |||
112 | 1. Source Code. | ||
113 | |||
114 | The "source code" for a work means the preferred form of the work | ||
115 | for making modifications to it. "Object code" means any non-source | ||
116 | form of a work. | ||
117 | |||
118 | A "Standard Interface" means an interface that either is an official | ||
119 | standard defined by a recognized standards body, or, in the case of | ||
120 | interfaces specified for a particular programming language, one that | ||
121 | is widely used among developers working in that language. | ||
122 | |||
123 | The "System Libraries" of an executable work include anything, other | ||
124 | than the work as a whole, that (a) is included in the normal form of | ||
125 | packaging a Major Component, but which is not part of that Major | ||
126 | Component, and (b) serves only to enable use of the work with that | ||
127 | Major Component, or to implement a Standard Interface for which an | ||
128 | implementation is available to the public in source code form. A | ||
129 | "Major Component", in this context, means a major essential component | ||
130 | (kernel, window system, and so on) of the specific operating system | ||
131 | (if any) on which the executable work runs, or a compiler used to | ||
132 | produce the work, or an object code interpreter used to run it. | ||
133 | |||
134 | The "Corresponding Source" for a work in object code form means all | ||
135 | the source code needed to generate, install, and (for an executable | ||
136 | work) run the object code and to modify the work, including scripts to | ||
137 | control those activities. However, it does not include the work's | ||
138 | System Libraries, or general-purpose tools or generally available free | ||
139 | programs which are used unmodified in performing those activities but | ||
140 | which are not part of the work. For example, Corresponding Source | ||
141 | includes interface definition files associated with source files for | ||
142 | the work, and the source code for shared libraries and dynamically | ||
143 | linked subprograms that the work is specifically designed to require, | ||
144 | such as by intimate data communication or control flow between those | ||
145 | subprograms and other parts of the work. | ||
146 | |||
147 | The Corresponding Source need not include anything that users | ||
148 | can regenerate automatically from other parts of the Corresponding | ||
149 | Source. | ||
150 | |||
151 | The Corresponding Source for a work in source code form is that | ||
152 | same work. | ||
153 | |||
154 | 2. Basic Permissions. | ||
155 | |||
156 | All rights granted under this License are granted for the term of | ||
157 | copyright on the Program, and are irrevocable provided the stated | ||
158 | conditions are met. This License explicitly affirms your unlimited | ||
159 | permission to run the unmodified Program. The output from running a | ||
160 | covered work is covered by this License only if the output, given its | ||
161 | content, constitutes a covered work. This License acknowledges your | ||
162 | rights of fair use or other equivalent, as provided by copyright law. | ||
163 | |||
164 | You may make, run and propagate covered works that you do not | ||
165 | convey, without conditions so long as your license otherwise remains | ||
166 | in force. You may convey covered works to others for the sole purpose | ||
167 | of having them make modifications exclusively for you, or provide you | ||
168 | with facilities for running those works, provided that you comply with | ||
169 | the terms of this License in conveying all material for which you do | ||
170 | not control copyright. Those thus making or running the covered works | ||
171 | for you must do so exclusively on your behalf, under your direction | ||
172 | and control, on terms that prohibit them from making any copies of | ||
173 | your copyrighted material outside their relationship with you. | ||
174 | |||
175 | Conveying under any other circumstances is permitted solely under | ||
176 | the conditions stated below. Sublicensing is not allowed; section 10 | ||
177 | makes it unnecessary. | ||
178 | |||
179 | 3. Protecting Users' Legal Rights From Anti-Circumvention Law. | ||
180 | |||
181 | No covered work shall be deemed part of an effective technological | ||
182 | measure under any applicable law fulfilling obligations under article | ||
183 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or | ||
184 | similar laws prohibiting or restricting circumvention of such | ||
185 | measures. | ||
186 | |||
187 | When you convey a covered work, you waive any legal power to forbid | ||
188 | circumvention of technological measures to the extent such circumvention | ||
189 | is effected by exercising rights under this License with respect to | ||
190 | the covered work, and you disclaim any intention to limit operation or | ||
191 | modification of the work as a means of enforcing, against the work's | ||
192 | users, your or third parties' legal rights to forbid circumvention of | ||
193 | technological measures. | ||
194 | |||
195 | 4. Conveying Verbatim Copies. | ||
196 | |||
197 | You may convey verbatim copies of the Program's source code as you | ||
198 | receive it, in any medium, provided that you conspicuously and | ||
199 | appropriately publish on each copy an appropriate copyright notice; | ||
200 | keep intact all notices stating that this License and any | ||
201 | non-permissive terms added in accord with section 7 apply to the code; | ||
202 | keep intact all notices of the absence of any warranty; and give all | ||
203 | recipients a copy of this License along with the Program. | ||
204 | |||
205 | You may charge any price or no price for each copy that you convey, | ||
206 | and you may offer support or warranty protection for a fee. | ||
207 | |||
208 | 5. Conveying Modified Source Versions. | ||
209 | |||
210 | You may convey a work based on the Program, or the modifications to | ||
211 | produce it from the Program, in the form of source code under the | ||
212 | terms of section 4, provided that you also meet all of these conditions: | ||
213 | |||
214 | a) The work must carry prominent notices stating that you modified | ||
215 | it, and giving a relevant date. | ||
216 | |||
217 | b) The work must carry prominent notices stating that it is | ||
218 | released under this License and any conditions added under section | ||
219 | 7. This requirement modifies the requirement in section 4 to | ||
220 | "keep intact all notices". | ||
221 | |||
222 | c) You must license the entire work, as a whole, under this | ||
223 | License to anyone who comes into possession of a copy. This | ||
224 | License will therefore apply, along with any applicable section 7 | ||
225 | additional terms, to the whole of the work, and all its parts, | ||
226 | regardless of how they are packaged. This License gives no | ||
227 | permission to license the work in any other way, but it does not | ||
228 | invalidate such permission if you have separately received it. | ||
229 | |||
230 | d) If the work has interactive user interfaces, each must display | ||
231 | Appropriate Legal Notices; however, if the Program has interactive | ||
232 | interfaces that do not display Appropriate Legal Notices, your | ||
233 | work need not make them do so. | ||
234 | |||
235 | A compilation of a covered work with other separate and independent | ||
236 | works, which are not by their nature extensions of the covered work, | ||
237 | and which are not combined with it such as to form a larger program, | ||
238 | in or on a volume of a storage or distribution medium, is called an | ||
239 | "aggregate" if the compilation and its resulting copyright are not | ||
240 | used to limit the access or legal rights of the compilation's users | ||
241 | beyond what the individual works permit. Inclusion of a covered work | ||
242 | in an aggregate does not cause this License to apply to the other | ||
243 | parts of the aggregate. | ||
244 | |||
245 | 6. Conveying Non-Sour |