1 |
GNU GENERAL PUBLIC LICENSE |
2 |
Version 2, June 1991 |
3 |
|
4 |
Copyright (C) 1989, 1991 Free Software Foundation, Inc. |
5 |
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
6 |
Everyone is permitted to copy and distribute verbatim copies |
7 |
of this license document, but changing it is not allowed. |
8 |
|
9 |
Preamble |
10 |
|
11 |
The licenses for most software are designed to take away your |
12 |
freedom to share and change it. By contrast, the GNU General Public |
13 |
License is intended to guarantee your freedom to share and change free |
14 |
software--to make sure the software is free for all its users. This |
15 |
General Public License applies to most of the Free Software |
16 |
Foundation's software and to any other program whose authors commit to |
17 |
using it. (Some other Free Software Foundation software is covered by |
18 |
the GNU Lesser General Public License instead.) You can apply it to |
19 |
your programs, too. |
20 |
|
21 |
When we speak of free software, we are referring to freedom, not |
22 |
price. Our General Public Licenses are designed to make sure that you |
23 |
have the freedom to distribute copies of free software (and charge for |
24 |
this service if you wish), that you receive source code or can get it |
25 |
if you want it, that you can change the software or use pieces of it |
26 |
in new free programs; and that you know you can do these things. |
27 |
|
28 |
To protect your rights, we need to make restrictions that forbid |
29 |
anyone to deny you these rights or to ask you to surrender the rights. |
30 |
These restrictions translate to certain responsibilities for you if you |
31 |
distribute copies of the software, or if you modify it. |
32 |
|
33 |
For example, if you distribute copies of such a program, whether |
34 |
gratis or for a fee, you must give the recipients all the rights that |
35 |
you have. You must make sure that they, too, receive or can get the |
36 |
source code. And you must show them these terms so they know their |
37 |
rights. |
38 |
|
39 |
We protect your rights with two steps: (1) copyright the software, and |
40 |
(2) offer you this license which gives you legal permission to copy, |
41 |
distribute and/or modify the software. |
42 |
|
43 |
Also, for each author's protection and ours, we want to make certain |
44 |
that everyone understands that there is no warranty for this free |
45 |
software. If the software is modified by someone else and passed on, we |
46 |
want its recipients to know that what they have is not the original, so |
47 |
that any problems introduced by others will not reflect on the original |
48 |
authors' reputations. |
49 |
|
50 |
Finally, any free program is threatened constantly by software |
51 |
patents. We wish to avoid the danger that redistributors of a free |
52 |
program will individually obtain patent licenses, in effect making the |
53 |
program proprietary. To prevent this, we have made it clear that any |
54 |
patent must be licensed for everyone's free use or not licensed at all. |
55 |
|
56 |
The precise terms and conditions for copying, distribution and |
57 |
modification follow. |
58 |
|
59 |
GNU GENERAL PUBLIC LICENSE |
60 |
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION |
61 |
|
62 |
0. This License applies to any program or other work which contains |
63 |
a notice placed by the copyright holder saying it may be distributed |
64 |
under the terms of this General Public License. The "Program", below, |
65 |
refers to any such program or work, and a "work based on the Program" |
66 |
means either the Program or any derivative work under copyright law: |
67 |
that is to say, a work containing the Program or a portion of it, |
68 |
either verbatim or with modifications and/or translated into another |
69 |
language. (Hereinafter, translation is included without limitation in |
70 |
the term "modification".) Each licensee is addressed as "you". |
71 |
|
72 |
Activities other than copying, distribution and modification are not |
73 |
covered by this License; they are outside its scope. The act of |
74 |
running the Program is not restricted, and the output from the Program |
75 |
is covered only if its contents constitute a work based on the |
76 |
Program (independent of having been made by running the Program). |
77 |
Whether that is true depends on what the Program does. |
78 |
|
79 |
1. You may copy and distribute verbatim copies of the Program's |
80 |
source code as you receive it, in any medium, provided that you |
81 |
conspicuously and appropriately publish on each copy an appropriate |
82 |
copyright notice and disclaimer of warranty; keep intact all the |
83 |
notices that refer to this License and to the absence of any warranty; |
84 |
and give any other recipients of the Program a copy of this License |
85 |
along with the Program. |
86 |
|
87 |
You may charge a fee for the physical act of transferring a copy, and |
88 |
you may at your option offer warranty protection in exchange for a fee. |
89 |
|
90 |
2. You may modify your copy or copies of the Program or any portion |
91 |
of it, thus forming a work based on the Program, and copy and |
92 |
distribute such modifications or work under the terms of Section 1 |
93 |
above, provided that you also meet all of these conditions: |
94 |
|
95 |
a) You must cause the modified files to carry prominent notices |
96 |
stating that you changed the files and the date of any change. |
97 |
|
98 |
b) You must cause any work that you distribute or publish, that in |
99 |
whole or in part contains or is derived from the Program or any |
100 |
part thereof, to be licensed as a whole at no charge to all third |
101 |
parties under the terms of this License. |
102 |
|
103 |
c) If the modified program normally reads commands interactively |
104 |
when run, you must cause it, when started running for such |
105 |
interactive use in the most ordinary way, to print or display an |
106 |
announcement including an appropriate copyright notice and a |
107 |
notice that there is no warranty (or else, saying that you provide |
108 |
a warranty) and that users may redistribute the program under |
109 |
these conditions, and telling the user how to view a copy of this |
110 |
License. (Exception: if the Program itself is interactive but |
111 |
does not normally print such an announcement, your work based on |
112 |
the Program is not required to print an announcement.) |
113 |
|
114 |
These requirements apply to the modified work as a whole. If |
115 |
identifiable sections of that work are not derived from the Program, |
116 |
and can be reasonably considered independent and separate works in |
117 |
themselves, then this License, and its terms, do not apply to those |
118 |
sections when you distribute them as separate works. But when you |
119 |
distribute the same sections as part of a whole which is a work based |
120 |
on the Program, the distribution of the whole must be on the terms of |
121 |
this License, whose permissions for other licensees extend to the |
122 |
entire whole, and thus to each and every part regardless of who wrote it. |
123 |
|
124 |
Thus, it is not the intent of this section to claim rights or contest |
125 |
your rights to work written entirely by you; rather, the intent is to |
126 |
exercise the right to control the distribution of derivative or |
127 |
collective works based on the Program. |
128 |
|
129 |
In addition, mere aggregation of another work not based on the Program |
130 |
with the Program (or with a work based on the Program) on a volume of |
131 |
a storage or distribution medium does not bring the other work under |
132 |
the scope of this License. |
133 |
|
134 |
3. You may copy and distribute the Program (or a work based on it, |
135 |
under Section 2) in object code or executable form under the terms of |
136 |
Sections 1 and 2 above provided that you also do one of the following: |
137 |
|
138 |
a) Accompany it with the complete corresponding machine-readable |
139 |
source code, which must be distributed under the terms of Sections |
140 |
1 and 2 above on a medium customarily used for software interchange; or, |
141 |
|
142 |
b) Accompany it with a written offer, valid for at least three |
143 |
years, to give any third party, for a charge no more than your |
144 |
cost of physically performing source distribution, a complete |
145 |
machine-readable copy of the corresponding source code, to be |
146 |
distributed under the terms of Sections 1 and 2 above on a medium |
147 |
customarily used for software interchange; or, |
148 |
|
149 |
c) Accompany it with the information you received as to the offer |
150 |
to distribute corresponding source code. (This alternative is |
151 |
allowed only for noncommercial distribution and only if you |
152 |
received the program in object code or executable form with such |
153 |
an offer, in accord with Subsection b above.) |
154 |
|
155 |
The source code for a work means the preferred form of the work for |
156 |
making modifications to it. For an executable work, complete source |
157 |
code means all the source code for all modules it contains, plus any |
158 |
associated interface definition files, plus the scripts used to |
159 |
control compilation and installation of the executable. However, as a |
160 |
special exception, the source code distributed need not include |
161 |
anything that is normally distributed (in either source or binary |
162 |
form) with the major components (compiler, kernel, and so on) of the |
163 |
operating system on which the executable runs, unless that component |
164 |
itself accompanies the executable. |
165 |
|
166 |
If distribution of executable or object code is made by offering |
167 |
access to copy from a designated place, then offering equivalent |
168 |
access to copy the source code from the same place counts as |
169 |
distribution of the source code, even though third parties are not |
170 |
compelled to copy the source along with the object code. |
171 |
|
172 |
4. You may not copy, modify, sublicense, or distribute the Program |
173 |
except as expressly provided under this License. Any attempt |
174 |
otherwise to copy, modify, sublicense or distribute the Program is |
175 |
void, and will automatically terminate your rights under this License. |
176 |
However, parties who have received copies, or rights, from you under |
177 |
this License will not have their licenses terminated so long as such |
178 |
parties remain in full compliance. |
179 |
|
180 |
5. You are not required to accept this License, since you have not |
181 |
signed it. However, nothing else grants you permission to modify or |
182 |
distribute the Program or its derivative works. These actions are |
183 |
prohibited by law if you do not accept this License. Therefore, by |
184 |
modifying or distributing the Program (or any work based on the |
185 |
Program), you indicate your acceptance of this License to do so, and |
186 |
all its terms and conditions for copying, distributing or modifying |
187 |
the Program or works based on it. |
188 |
|
189 |
6. Each time you redistribute the Program (or any work based on the |
190 |
Program), the recipient automatically receives a license from the |
191 |
original licensor to copy, distribute or modify the Program subject to |
192 |
these terms and conditions. You may not impose any further |
193 |
restrictions on the recipients' exercise of the rights granted herein. |
194 |
You are not responsible for enforcing compliance by third parties to |
195 |
this License. |
196 |
|
197 |
7. If, as a consequence of a court judgment or allegation of patent |
198 |
infringement or for any other reason (not limited to patent issues), |
199 |
conditions are imposed on you (whether by court order, agreement or |
200 |
otherwise) that contradict the conditions of this License, they do not |
201 |
excuse you from the conditions of this License. If you cannot |
202 |
distribute so as to satisfy simultaneously your obligations under this |
203 |
License and any other pertinent obligations, then as a consequence you |
204 |
may not distribute the Program at all. For example, if a patent |
205 |
license would not permit royalty-free redistribution of the Program by |
206 |
all those who receive copies directly or indirectly through you, then |
207 |
the only way you could satisfy both it and this License would be to |
208 |
refrain entirely from distribution of the Program. |
209 |
|
210 |
If any portion of this section is held invalid or unenforceable under |
211 |
any particular circumstance, the balance of the section is intended to |
212 |
apply and the section as a whole is intended to apply in other |
213 |
circumstances. |
214 |
|
215 |
It is not the purpose of this section to induce you to infringe any |
216 |
patents or other property right claims or to contest validity of any |
217 |
such claims; this section has the sole purpose of protecting the |
218 |
integrity of the free software distribution system, which is |
219 |
implemented by public license practices. Many people have made |
220 |
generous contributions to the wide range of software distributed |
221 |
through that system in reliance on consistent application of that |
222 |
system; it is up to the author/donor to decide if he or she is willing |
223 |
to distribute software through any other system and a licensee cannot |
224 |
impose that choice. |
225 |
|
226 |
This section is intended to make thoroughly clear what is believed to |
227 |
be a consequence of the rest of this License. |
228 |
|
229 |
8. If the distribution and/or use of the Program is restricted in |
230 |
certain countries either by patents or by copyrighted interfaces, the |
231 |
original copyright holder who places the Program under this License |
232 |
may add an explicit geographical distribution limitation excluding |
233 |
those countries, so that distribution is permitted only in or among |
234 |
countries not thus excluded. In such case, this License incorporates |
235 |
the limitation as if written in the body of this License. |
236 |
|
237 |
9. The Free Software Foundation may publish revised and/or new versions |
238 |
of the General Public License from time to time. Such new versions will |
239 |
be similar in spirit to the present version, but may differ in detail to |
240 |
address new problems or concerns. |
241 |
|
242 |
Each version is given a distinguishing version number. If the Program |
243 |
specifies a version number of this License which applies to it and "any |
244 |
later version", you have the option of following the terms and conditions |
245 |
either of that version or of any later version published by the Free |
246 |
Software Foundation. If the Program does not specify a version number of |
247 |
this License, you may choose any version ever published by the Free Software |
248 |
Foundation. |
249 |
|
250 |
10. If you wish to incorporate parts of the Program into other free |
251 |
programs whose distribution conditions are different, write to the author |
252 |
to ask for permission. For software which is copyrighted by the Free |
253 |
Software Foundation, write to the Free Software Foundation; we sometimes |
254 |
make exceptions for this. Our decision will be guided by the two goals |
255 |
of preserving the free status of all derivatives of our free software and |
256 |
of promoting the sharing and reuse of software generally. |
257 |
|
258 |
NO WARRANTY |
259 |
|
260 |
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, |
261 |
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT |
262 |
PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE |
263 |
STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER |
264 |
PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF |
265 |
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT |
266 |
NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
267 |
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
268 |
THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE |
269 |
PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE |
270 |
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY |
271 |
SERVICING, REPAIR OR CORRECTION. |
272 |
|
273 |
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR |
274 |
AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY |
275 |
OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE |
276 |
PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR |
277 |
DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR |
278 |
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR |
279 |
INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED |
280 |
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR |
281 |
LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF |
282 |
THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF |
283 |
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE |
284 |
POSSIBILITY OF SUCH DAMAGES. |
285 |
|
286 |
END OF TERMS AND CONDITIONS |
287 |
|