xref: /illumos-kvm/COPYING.linux (revision 2a9ff8dc)
1The KVM Project is derived from the Linux kernel.
2
3   NOTE! This copyright does *not* cover user programs that use kernel
4 services by normal system calls - this is merely considered normal use
5 of the kernel, and does *not* fall under the heading of "derived work".
6 Also note that the GPL below is copyrighted by the Free Software
7 Foundation, but the instance of code that it refers to (the Linux
8 kernel) is copyrighted by me and others who actually wrote it.
9
10 Also note that the only valid version of the GPL as far as the kernel
11 is concerned is _this_ particular version of the license (ie v2, not
12 v2.2 or v3.x or whatever), unless explicitly otherwise stated.
13
14			Linus Torvalds
15
16----------------------------------------
17
18		    GNU GENERAL PUBLIC LICENSE
19		       Version 2, June 1991
20
21 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
22                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
23 Everyone is permitted to copy and distribute verbatim copies
24 of this license document, but changing it is not allowed.
25
26			    Preamble
27
28  The licenses for most software are designed to take away your
29freedom to share and change it.  By contrast, the GNU General Public
30License is intended to guarantee your freedom to share and change free
31software--to make sure the software is free for all its users.  This
32General Public License applies to most of the Free Software
33Foundation's software and to any other program whose authors commit to
34using it.  (Some other Free Software Foundation software is covered by
35the GNU Library General Public License instead.)  You can apply it to
36your programs, too.
37
38  When we speak of free software, we are referring to freedom, not
39price.  Our General Public Licenses are designed to make sure that you
40have the freedom to distribute copies of free software (and charge for
41this service if you wish), that you receive source code or can get it
42if you want it, that you can change the software or use pieces of it
43in new free programs; and that you know you can do these things.
44
45  To protect your rights, we need to make restrictions that forbid
46anyone to deny you these rights or to ask you to surrender the rights.
47These restrictions translate to certain responsibilities for you if you
48distribute copies of the software, or if you modify it.
49
50  For example, if you distribute copies of such a program, whether
51gratis or for a fee, you must give the recipients all the rights that
52you have.  You must make sure that they, too, receive or can get the
53source code.  And you must show them these terms so they know their
54rights.
55
56  We protect your rights with two steps: (1) copyright the software, and
57(2) offer you this license which gives you legal permission to copy,
58distribute and/or modify the software.
59
60  Also, for each author's protection and ours, we want to make certain
61that everyone understands that there is no warranty for this free
62software.  If the software is modified by someone else and passed on, we
63want its recipients to know that what they have is not the original, so
64that any problems introduced by others will not reflect on the original
65authors' reputations.
66
67  Finally, any free program is threatened constantly by software
68patents.  We wish to avoid the danger that redistributors of a free
69program will individually obtain patent licenses, in effect making the
70program proprietary.  To prevent this, we have made it clear that any
71patent must be licensed for everyone's free use or not licensed at all.
72
73  The precise terms and conditions for copying, distribution and
74modification follow.
75
76		    GNU GENERAL PUBLIC LICENSE
77   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
78
79  0. This License applies to any program or other work which contains
80a notice placed by the copyright holder saying it may be distributed
81under the terms of this General Public License.  The "Program", below,
82refers to any such program or work, and a "work based on the Program"
83means either the Program or any derivative work under copyright law:
84that is to say, a work containing the Program or a portion of it,
85either verbatim or with modifications and/or translated into another
86language.  (Hereinafter, translation is included without limitation in
87the term "modification".)  Each licensee is addressed as "you".
88
89Activities other than copying, distribution and modification are not
90covered by this License; they are outside its scope.  The act of
91running the Program is not restricted, and the output from the Program
92is covered only if its contents constitute a work based on the
93Program (independent of having been made by running the Program).
94Whether that is true depends on what the Program does.
95
96  1. You may copy and distribute verbatim copies of the Program's
97source code as you receive it, in any medium, provided that you
98conspicuously and appropriately publish on each copy an appropriate
99copyright notice and disclaimer of warranty; keep intact all the
100notices that refer to this License and to the absence of any warranty;
101and give any other recipients of the Program a copy of this License
102along with the Program.
103
104You may charge a fee for the physical act of transferring a copy, and
105you may at your option offer warranty protection in exchange for a fee.
106
107  2. You may modify your copy or copies of the Program or any portion
108of it, thus forming a work based on the Program, and copy and
109distribute such modifications or work under the terms of Section 1
110above, provided that you also meet all of these conditions:
111
112    a) You must cause the modified files to carry prominent notices
113    stating that you changed the files and the date of any change.
114
115    b) You must cause any work that you distribute or publish, that in
116    whole or in part contains or is derived from the Program or any
117    part thereof, to be licensed as a whole at no charge to all third
118    parties under the terms of this License.
119
120    c) If the modified program normally reads commands interactively
121    when run, you must cause it, when started running for such
122    interactive use in the most ordinary way, to print or display an
123    announcement including an appropriate copyright notice and a
124    notice that there is no warranty (or else, saying that you provide
125    a warranty) and that users may redistribute the program under
126    these conditions, and telling the user how to view a copy of this
127    License.  (Exception: if the Program itself is interactive but
128    does not normally print such an announcement, your work based on
129    the Program is not required to print an announcement.)
130
131These requirements apply to the modified work as a whole.  If
132identifiable sections of that work are not derived from the Program,
133and can be reasonably considered independent and separate works in
134themselves, then this License, and its terms, do not apply to those
135sections when you distribute them as separate works.  But when you
136distribute the same sections as part of a whole which is a work based
137on the Program, the distribution of the whole must be on the terms of
138this License, whose permissions for other licensees extend to the
139entire whole, and thus to each and every part regardless of who wrote it.
140
141Thus, it is not the intent of this section to claim rights or contest
142your rights to work written entirely by you; rather, the intent is to
143exercise the right to control the distribution of derivative or
144collective works based on the Program.
145
146In addition, mere aggregation of another work not based on the Program
147with the Program (or with a work based on the Program) on a volume of
148a storage or distribution medium does not bring the other work under
149the scope of this License.
150
151  3. You may copy and distribute the Program (or a work based on it,
152under Section 2) in object code or executable form under the terms of
153Sections 1 and 2 above provided that you also do one of the following:
154
155    a) Accompany it with the complete corresponding machine-readable
156    source code, which must be distributed under the terms of Sections
157    1 and 2 above on a medium customarily used for software interchange; or,
158
159    b) Accompany it with a written offer, valid for at least three
160    years, to give any third party, for a charge no more than your
161    cost of physically performing source distribution, a complete
162    machine-readable copy of the corresponding source code, to be
163    distributed under the terms of Sections 1 and 2 above on a medium
164    customarily used for software interchange; or,
165
166    c) Accompany it with the information you received as to the offer
167    to distribute corresponding source code.  (This alternative is
168    allowed only for noncommercial distribution and only if you
169    received the program in object code or executable form with such
170    an offer, in accord with Subsection b above.)
171
172The source code for a work means the preferred form of the work for
173making modifications to it.  For an executable work, complete source
174code means all the source code for all modules it contains, plus any
175associated interface definition files, plus the scripts used to
176control compilation and installation of the executable.  However, as a
177special exception, the source code distributed need not include
178anything that is normally distributed (in either source or binary
179form) with the major components (compiler, kernel, and so on) of the
180operating system on which the executable runs, unless that component
181itself accompanies the executable.
182
183If distribution of executable or object code is made by offering
184access to copy from a designated place, then offering equivalent
185access to copy the source code from the same place counts as
186distribution of the source code, even though third parties are not
187compelled to copy the source along with the object code.
188
189  4. You may not copy, modify, sublicense, or distribute the Program
190except as expressly provided under this License.  Any attempt
191otherwise to copy, modify, sublicense or distribute the Program is
192void, and will automatically terminate your rights under this License.
193However, parties who have received copies, or rights, from you under
194this License will not have their licenses terminated so long as such
195parties remain in full compliance.
196
197  5. You are not required to accept this License, since you have not
198signed it.  However, nothing else grants you permission to modify or
199distribute the Program or its derivative works.  These actions are
200prohibited by law if you do not accept this License.  Therefore, by
201modifying or distributing the Program (or any work based on the
202Program), you indicate your acceptance of this License to do so, and
203all its terms and conditions for copying, distributing or modifying
204the Program or works based on it.
205
206  6. Each time you redistribute the Program (or any work based on the
207Program), the recipient automatically receives a license from the
208original licensor to copy, distribute or modify the Program subject to
209these terms and conditions.  You may not impose any further
210restrictions on the recipients' exercise of the rights granted herein.
211You are not responsible for enforcing compliance by third parties to
212this License.
213
214  7. If, as a consequence of a court judgment or allegation of patent
215infringement or for any other reason (not limited to patent issues),
216conditions are imposed on you (whether by court order, agreement or
217otherwise) that contradict the conditions of this License, they do not
218excuse you from the conditions of this License.  If you cannot
219distribute so as to satisfy simultaneously your obligations under this
220License and any other pertinent obligations, then as a consequence you
221may not distribute the Program at all.  For example, if a patent
222license would not permit royalty-free redistribution of the Program by
223all those who receive copies directly or indirectly through you, then
224the only way you could satisfy both it and this License would be to
225refrain entirely from distribution of the Program.
226
227If any portion of this section is held invalid or unenforceable under
228any particular circumstance, the balance of the section is intended to
229apply and the section as a whole is intended to apply in other
230circumstances.
231
232It is not the purpose of this section to induce you to infringe any
233patents or other property right claims or to contest validity of any
234such claims; this section has the sole purpose of protecting the
235integrity of the free software distribution system, which is
236implemented by public license practices.  Many people have made
237generous contributions to the wide range of software distributed
238through that system in reliance on consistent application of that
239system; it is up to the author/donor to decide if he or she is willing
240to distribute software through any other system and a licensee cannot
241impose that choice.
242
243This section is intended to make thoroughly clear what is believed to
244be a consequence of the rest of this License.
245
246  8. If the distribution and/or use of the Program is restricted in
247certain countries either by patents or by copyrighted interfaces, the
248original copyright holder who places the Program under this License
249may add an explicit geographical distribution limitation excluding
250those countries, so that distribution is permitted only in or among
251countries not thus excluded.  In such case, this License incorporates
252the limitation as if written in the body of this License.
253
254  9. The Free Software Foundation may publish revised and/or new versions
255of the General Public License from time to time.  Such new versions will
256be similar in spirit to the present version, but may differ in detail to
257address new problems or concerns.
258
259Each version is given a distinguishing version number.  If the Program
260specifies a version number of this License which applies to it and "any
261later version", you have the option of following the terms and conditions
262either of that version or of any later version published by the Free
263Software Foundation.  If the Program does not specify a version number of
264this License, you may choose any version ever published by the Free Software
265Foundation.
266
267  10. If you wish to incorporate parts of the Program into other free
268programs whose distribution conditions are different, write to the author
269to ask for permission.  For software which is copyrighted by the Free
270Software Foundation, write to the Free Software Foundation; we sometimes
271make exceptions for this.  Our decision will be guided by the two goals
272of preserving the free status of all derivatives of our free software and
273of promoting the sharing and reuse of software generally.
274
275			    NO WARRANTY
276
277  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
278FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
279OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
280PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
281OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
282MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
283TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
284PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
285REPAIR OR CORRECTION.
286
287  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
288WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
289REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
290INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
291OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
292TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
293YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
294PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
295POSSIBILITY OF SUCH DAMAGES.
296
297		     END OF TERMS AND CONDITIONS
298
299	    How to Apply These Terms to Your New Programs
300
301  If you develop a new program, and you want it to be of the greatest
302possible use to the public, the best way to achieve this is to make it
303free software which everyone can redistribute and change under these terms.
304
305  To do so, attach the following notices to the program.  It is safest
306to attach them to the start of each source file to most effectively
307convey the exclusion of warranty; and each file should have at least
308the "copyright" line and a pointer to where the full notice is found.
309
310    <one line to give the program's name and a brief idea of what it does.>
311    Copyright (C) <year>  <name of author>
312
313    This program is free software; you can redistribute it and/or modify
314    it under the terms of the GNU General Public License as published by
315    the Free Software Foundation; either version 2 of the License, or
316    (at your option) any later version.
317
318    This program is distributed in the hope that it will be useful,
319    but WITHOUT ANY WARRANTY; without even the implied warranty of
320    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
321    GNU General Public License for more details.
322
323    You should have received a copy of the GNU General Public License
324    along with this program; if not, write to the Free Software
325    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
326
327
328Also add information on how to contact you by electronic and paper mail.
329
330If the program is interactive, make it output a short notice like this
331when it starts in an interactive mode:
332
333    Gnomovision version 69, Copyright (C) year name of author
334    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
335    This is free software, and you are welcome to redistribute it
336    under certain conditions; type `show c' for details.
337
338The hypothetical commands `show w' and `show c' should show the appropriate
339parts of the General Public License.  Of course, the commands you use may
340be called something other than `show w' and `show c'; they could even be
341mouse-clicks or menu items--whatever suits your program.
342
343You should also get your employer (if you work as a programmer) or your
344school, if any, to sign a "copyright disclaimer" for the program, if
345necessary.  Here is a sample; alter the names:
346
347  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
348  `Gnomovision' (which makes passes at compilers) written by James Hacker.
349
350  <signature of Ty Coon>, 1 April 1989
351  Ty Coon, President of Vice
352
353This General Public License does not permit incorporating your program into
354proprietary programs.  If your program is a subroutine library, you may
355consider it more useful to permit linking proprietary applications with the
356library.  If this is what you want to do, use the GNU Library General
357Public License instead of this License.
358