1@ignore
2@c Set file name and title for man page.
3@setfilename gpl
4@settitle GNU General Public License
5@c man begin SEEALSO
6gfdl(7), fsf-funding(7).
7@c man end
8@c man begin COPYRIGHT
9Copyright @copyright{} 2007 Free Software Foundation, Inc.
10
11Everyone is permitted to copy and distribute verbatim copies of this
12license document, but changing it is not allowed.
13@c man end
14@end ignore
15@node Copying
16@c man begin DESCRIPTION
17@unnumbered GNU General Public License
18@center Version 3, 29 June 2007
19
20@c This file is intended to be included in another file.
21
22@display
23Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/}
24
25Everyone is permitted to copy and distribute verbatim copies of this
26license document, but changing it is not allowed.
27@end display
28
29@heading Preamble
30
31The GNU General Public License is a free, copyleft license for
32software and other kinds of works.
33
34The licenses for most software and other practical works are designed
35to take away your freedom to share and change the works.  By contrast,
36the GNU General Public License is intended to guarantee your freedom
37to share and change all versions of a program--to make sure it remains
38free software for all its users.  We, the Free Software Foundation,
39use the GNU General Public License for most of our software; it
40applies also to any other work released this way by its authors.  You
41can apply it to your programs, too.
42
43When we speak of free software, we are referring to freedom, not
44price.  Our General Public Licenses are designed to make sure that you
45have the freedom to distribute copies of free software (and charge for
46them if you wish), that you receive source code or can get it if you
47want it, that you can change the software or use pieces of it in new
48free programs, and that you know you can do these things.
49
50To protect your rights, we need to prevent others from denying you
51these rights or asking you to surrender the rights.  Therefore, you
52have certain responsibilities if you distribute copies of the
53software, or if you modify it: responsibilities to respect the freedom
54of others.
55
56For example, if you distribute copies of such a program, whether
57gratis or for a fee, you must pass on to the recipients the same
58freedoms that you received.  You must make sure that they, too,
59receive or can get the source code.  And you must show them these
60terms so they know their rights.
61
62Developers that use the GNU GPL protect your rights with two steps:
63(1) assert copyright on the software, and (2) offer you this License
64giving you legal permission to copy, distribute and/or modify it.
65
66For the developers' and authors' protection, the GPL clearly explains
67that there is no warranty for this free software.  For both users' and
68authors' sake, the GPL requires that modified versions be marked as
69changed, so that their problems will not be attributed erroneously to
70authors of previous versions.
71
72Some devices are designed to deny users access to install or run
73modified versions of the software inside them, although the
74manufacturer can do so.  This is fundamentally incompatible with the
75aim of protecting users' freedom to change the software.  The
76systematic pattern of such abuse occurs in the area of products for
77individuals to use, which is precisely where it is most unacceptable.
78Therefore, we have designed this version of the GPL to prohibit the
79practice for those products.  If such problems arise substantially in
80other domains, we stand ready to extend this provision to those
81domains in future versions of the GPL, as needed to protect the
82freedom of users.
83
84Finally, every program is threatened constantly by software patents.
85States should not allow patents to restrict development and use of
86software on general-purpose computers, but in those that do, we wish
87to avoid the special danger that patents applied to a free program
88could make it effectively proprietary.  To prevent this, the GPL
89assures that patents cannot be used to render the program non-free.
90
91The precise terms and conditions for copying, distribution and
92modification follow.
93
94@heading TERMS AND CONDITIONS
95
96@enumerate 0
97@item Definitions.
98
99``This License'' refers to version 3 of the GNU General Public License.
100
101``Copyright'' also means copyright-like laws that apply to other kinds
102of works, such as semiconductor masks.
103
104``The Program'' refers to any copyrightable work licensed under this
105License.  Each licensee is addressed as ``you''.  ``Licensees'' and
106``recipients'' may be individuals or organizations.
107
108To ``modify'' a work means to copy from or adapt all or part of the work
109in a fashion requiring copyright permission, other than the making of
110an exact copy.  The resulting work is called a ``modified version'' of
111the earlier work or a work ``based on'' the earlier work.
112
113A ``covered work'' means either the unmodified Program or a work based
114on the Program.
115
116To ``propagate'' a work means to do anything with it that, without
117permission, would make you directly or secondarily liable for
118infringement under applicable copyright law, except executing it on a
119computer or modifying a private copy.  Propagation includes copying,
120distribution (with or without modification), making available to the
121public, and in some countries other activities as well.
122
123To ``convey'' a work means any kind of propagation that enables other
124parties to make or receive copies.  Mere interaction with a user
125through a computer network, with no transfer of a copy, is not
126conveying.
127
128An interactive user interface displays ``Appropriate Legal Notices'' to
129the extent that it includes a convenient and prominently visible
130feature that (1) displays an appropriate copyright notice, and (2)
131tells the user that there is no warranty for the work (except to the
132extent that warranties are provided), that licensees may convey the
133work under this License, and how to view a copy of this License.  If
134the interface presents a list of user commands or options, such as a
135menu, a prominent item in the list meets this criterion.
136
137@item Source Code.
138
139The ``source code'' for a work means the preferred form of the work for
140making modifications to it.  ``Object code'' means any non-source form
141of a work.
142
143A ``Standard Interface'' means an interface that either is an official
144standard defined by a recognized standards body, or, in the case of
145interfaces specified for a particular programming language, one that
146is widely used among developers working in that language.
147
148The ``System Libraries'' of an executable work include anything, other
149than the work as a whole, that (a) is included in the normal form of
150packaging a Major Component, but which is not part of that Major
151Component, and (b) serves only to enable use of the work with that
152Major Component, or to implement a Standard Interface for which an
153implementation is available to the public in source code form.  A
154``Major Component'', in this context, means a major essential component
155(kernel, window system, and so on) of the specific operating system
156(if any) on which the executable work runs, or a compiler used to
157produce the work, or an object code interpreter used to run it.
158
159The ``Corresponding Source'' for a work in object code form means all
160the source code needed to generate, install, and (for an executable
161work) run the object code and to modify the work, including scripts to
162control those activities.  However, it does not include the work's
163System Libraries, or general-purpose tools or generally available free
164programs which are used unmodified in performing those activities but
165which are not part of the work.  For example, Corresponding Source
166includes interface definition files associated with source files for
167the work, and the source code for shared libraries and dynamically
168linked subprograms that the work is specifically designed to require,
169such as by intimate data communication or control flow between those
170subprograms and other parts of the work.
171
172The Corresponding Source need not include anything that users can
173regenerate automatically from other parts of the Corresponding Source.
174
175The Corresponding Source for a work in source code form is that same
176work.
177
178@item Basic Permissions.
179
180All rights granted under this License are granted for the term of
181copyright on the Program, and are irrevocable provided the stated
182conditions are met.  This License explicitly affirms your unlimited
183permission to run the unmodified Program.  The output from running a
184covered work is covered by this License only if the output, given its
185content, constitutes a covered work.  This License acknowledges your
186rights of fair use or other equivalent, as provided by copyright law.
187
188You may make, run and propagate covered works that you do not convey,
189without conditions so long as your license otherwise remains in force.
190You may convey covered works to others for the sole purpose of having
191them make modifications exclusively for you, or provide you with
192facilities for running those works, provided that you comply with the
193terms of this License in conveying all material for which you do not
194control copyright.  Those thus making or running the covered works for
195you must do so exclusively on your behalf, under your direction and
196control, on terms that prohibit them from making any copies of your
197copyrighted material outside their relationship with you.
198
199Conveying under any other circumstances is permitted solely under the
200conditions stated below.  Sublicensing is not allowed; section 10
201makes it unnecessary.
202
203@item Protecting Users' Legal Rights From Anti-Circumvention Law.
204
205No covered work shall be deemed part of an effective technological
206measure under any applicable law fulfilling obligations under article
20711 of the WIPO copyright treaty adopted on 20 December 1996, or
208similar laws prohibiting or restricting circumvention of such
209measures.
210
211When you convey a covered work, you waive any legal power to forbid
212circumvention of technological measures to the extent such
213circumvention is effected by exercising rights under this License with
214respect to the covered work, and you disclaim any intention to limit
215operation or modification of the work as a means of enforcing, against
216the work's users, your or third parties' legal rights to forbid
217circumvention of technological measures.
218
219@item Conveying Verbatim Copies.
220
221You may convey verbatim copies of the Program's source code as you
222receive it, in any medium, provided that you conspicuously and
223appropriately publish on each copy an appropriate copyright notice;
224keep intact all notices stating that this License and any
225non-permissive terms added in accord with section 7 apply to the code;
226keep intact all notices of the absence of any warranty; and give all
227recipients a copy of this License along with the Program.
228
229You may charge any price or no price for each copy that you convey,
230and you may offer support or warranty protection for a fee.
231
232@item Conveying Modified Source Versions.
233
234You may convey a work based on the Program, or the modifications to
235produce it from the Program, in the form of source code under the
236terms of section 4, provided that you also meet all of these
237conditions:
238
239@enumerate a
240@item
241The work must carry prominent notices stating that you modified it,
242and giving a relevant date.
243
244@item
245The work must carry prominent notices stating that it is released
246under this License and any conditions added under section 7.  This
247requirement modifies the requirement in section 4 to ``keep intact all
248notices''.
249
250@item
251You must license the entire work, as a whole, under this License to
252anyone who comes into possession of a copy.  This License will
253therefore apply, along with any applicable section 7 additional terms,
254to the whole of the work, and all its parts, regardless of how they
255are packaged.  This License gives no permission to license the work in
256any other way, but it does not invalidate such permission if you have
257separately received it.
258
259@item
260If the work has interactive user interfaces, each must display
261Appropriate Legal Notices; however, if the Program has interactive
262interfaces that do not display Appropriate Legal Notices, your work
263need not make them do so.
264@end enumerate
265
266A compilation of a covered work with other separate and independent
267works, which are not by their nature extensions of the covered work,
268and which are not combined with it such as to form a larger program,
269in or on a volume of a storage or distribution medium, is called an
270``aggregate'' if the compilation and its resulting copyright are not
271used to limit the access or legal rights of the compilation's users
272beyond what the individual works permit.  Inclusion of a covered work
273in an aggregate does not cause this License to apply to the other
274parts of the aggregate.
275
276@item  Conveying Non-Source Forms.
277
278You may convey a covered work in object code form under the terms of
279sections 4 and 5, provided that you also convey the machine-readable
280Corresponding Source under the terms of this License, in one of these
281ways:
282
283@enumerate a
284@item
285Convey the object code in, or embodied in, a physical product
286(including a physical distribution medium), accompanied by the
287Corresponding Source fixed on a durable physical medium customarily
288used for software interchange.
289
290@item
291Convey the object code in, or embodied in, a physical product
292(including a physical distribution medium), accompanied by a written
293offer, valid for at least three years and valid for as long as you
294offer spare parts or customer support for that product model, to give
295anyone who possesses the object code either (1) a copy of the
296Corresponding Source for all the software in the product that is
297covered by this License, on a durable physical medium customarily used
298for software interchange, for a price no more than your reasonable
299cost of physically performing this conveying of source, or (2) access
300to copy the Corresponding Source from a network server at no charge.
301
302@item
303Convey individual copies of the object code with a copy of the written
304offer to provide the Corresponding Source.  This alternative is
305allowed only occasionally and noncommercially, and only if you
306received the object code with such an offer, in accord with subsection
3076b.
308
309@item
310Convey the object code by offering access from a designated place
311(gratis or for a charge), and offer equivalent access to the
312Corresponding Source in the same way through the same place at no
313further charge.  You need not require recipients to copy the
314Corresponding Source along with the object code.  If the place to copy
315the object code is a network server, the Corresponding Source may be
316on a different server (operated by you or a third party) that supports
317equivalent copying facilities, provided you maintain clear directions
318next to the object code saying where to find the Corresponding Source.
319Regardless of what server hosts the Corresponding Source, you remain
320obligated to ensure that it is available for as long as needed to
321satisfy these requirements.
322
323@item
324Convey the object code using peer-to-peer transmission, provided you
325inform other peers where the object code and Corresponding Source of
326the work are being offered to the general public at no charge under
327subsection 6d.
328
329@end enumerate
330
331A separable portion of the object code, whose source code is excluded
332from the Corresponding Source as a System Library, need not be
333included in conveying the object code work.
334
335A ``User Product'' is either (1) a ``consumer product'', which means any
336tangible personal property which is normally used for personal,
337family, or household purposes, or (2) anything designed or sold for
338incorporation into a dwelling.  In determining whether a product is a
339consumer product, doubtful cases shall be resolved in favor of
340coverage.  For a particular product received by a particular user,
341``normally used'' refers to a typical or common use of that class of
342product, regardless of the status of the particular user or of the way
343in which the particular user actually uses, or expects or is expected
344to use, the product.  A product is a consumer product regardless of
345whether the product has substantial commercial, industrial or
346non-consumer uses, unless such uses represent the only significant
347mode of use of the product.
348
349``Installation Information'' for a User Product means any methods,
350procedures, authorization keys, or other information required to
351install and execute modified versions of a covered work in that User
352Product from a modified version of its Corresponding Source.  The
353information must suffice to ensure that the continued functioning of
354the modified object code is in no case prevented or interfered with
355solely because modification has been made.
356
357If you convey an object code work under this section in, or with, or
358specifically for use in, a User Product, and the conveying occurs as
359part of a transaction in which the right of possession and use of the
360User Product is transferred to the recipient in perpetuity or for a
361fixed term (regardless of how the transaction is characterized), the
362Corresponding Source conveyed under this section must be accompanied
363by the Installation Information.  But this requirement does not apply
364if neither you nor any third party retains the ability to install
365modified object code on the User Product (for example, the work has
366been installed in ROM).
367
368The requirement to provide Installation Information does not include a
369requirement to continue to provide support service, warranty, or
370updates for a work that has been modified or installed by the
371recipient, or for the User Product in which it has been modified or
372installed.  Access to a network may be denied when the modification
373itself materially and adversely affects the operation of the network
374or violates the rules and protocols for communication across the
375network.
376
377Corresponding Source conveyed, and Installation Information provided,
378in accord with this section must be in a format that is publicly
379documented (and with an implementation available to the public in
380source code form), and must require no special password or key for
381unpacking, reading or copying.
382
383@item Additional Terms.
384
385``Additional permissions'' are terms that supplement the terms of this
386License by making exceptions from one or more of its conditions.
387Additional permissions that are applicable to the entire Program shall
388be treated as though they were included in this License, to the extent
389that they are valid under applicable law.  If additional permissions
390apply only to part of the Program, that part may be used separately
391under those permissions, but the entire Program remains governed by
392this License without regard to the additional permissions.
393
394When you convey a copy of a covered work, you may at your option
395remove any additional permissions from that copy, or from any part of
396it.  (Additional permissions may be written to require their own
397removal in certain cases when you modify the work.)  You may place
398additional permissions on material, added by you to a covered work,
399for which you have or can give appropriate copyright permission.
400
401Notwithstanding any other provision of this License, for material you
402add to a covered work, you may (if authorized by the copyright holders
403of that material) supplement the terms of this License with terms:
404
405@enumerate a
406@item
407Disclaiming warranty or limiting liability differently from the terms
408of sections 15 and 16 of this License; or
409
410@item
411Requiring preservation of specified reasonable legal notices or author
412attributions in that material or in the Appropriate Legal Notices
413displayed by works containing it; or
414
415@item
416Prohibiting misrepresentation of the origin of that material, or
417requiring that modified versions of such material be marked in
418reasonable ways as different from the original version; or
419
420@item
421Limiting the use for publicity purposes of names of licensors or
422authors of the material; or
423
424@item
425Declining to grant rights under trademark law for use of some trade
426names, trademarks, or service marks; or
427
428@item
429Requiring indemnification of licensors and authors of that material by
430anyone who conveys the material (or modified versions of it) with
431contractual assumptions of liability to the recipient, for any
432liability that these contractual assumptions directly impose on those
433licensors and authors.
434@end enumerate
435
436All other non-permissive additional terms are considered ``further
437restrictions'' within the meaning of section 10.  If the Program as you
438received it, or any part of it, contains a notice stating that it is
439governed by this License along with a term that is a further
440restriction, you may remove that term.  If a license document contains
441a further restriction but permits relicensing or conveying under this
442License, you may add to a covered work material governed by the terms
443of that license document, provided that the further restriction does
444not survive such relicensing or conveying.
445
446If you add terms to a covered work in accord with this section, you
447must place, in the relevant source files, a statement of the
448additional terms that apply to those files, or a notice indicating
449where to find the applicable terms.
450
451Additional terms, permissive or non-permissive, may be stated in the
452form of a separately written license, or stated as exceptions; the
453above requirements apply either way.
454
455@item Termination.
456
457You may not propagate or modify a covered work except as expressly
458provided under this License.  Any attempt otherwise to propagate or
459modify it is void, and will automatically terminate your rights under
460this License (including any patent licenses granted under the third
461paragraph of section 11).
462
463However, if you cease all violation of this License, then your license
464from a particular copyright holder is reinstated (a) provisionally,
465unless and until the copyright holder explicitly and finally
466terminates your license, and (b) permanently, if the copyright holder
467fails to notify you of the violation by some reasonable means prior to
46860 days after the cessation.
469
470Moreover, your license from a particular copyright holder is
471reinstated permanently if the copyright holder notifies you of the
472violation by some reasonable means, this is the first time you have
473received notice of violation of this License (for any work) from that
474copyright holder, and you cure the violation prior to 30 days after
475your receipt of the notice.
476
477Termination of your rights under this section does not terminate the
478licenses of parties who have received copies or rights from you under
479this License.  If your rights have been terminated and not permanently
480reinstated, you do not qualify to receive new licenses for the same
481material under section 10.
482
483@item Acceptance Not Required for Having Copies.
484
485You are not required to accept this License in order to receive or run
486a copy of the Program.  Ancillary propagation of a covered work
487occurring solely as a consequence of using peer-to-peer transmission
488to receive a copy likewise does not require acceptance.  However,
489nothing other than this License grants you permission to propagate or
490modify any covered work.  These actions infringe copyright if you do
491not accept this License.  Therefore, by modifying or propagating a
492covered work, you indicate your acceptance of this License to do so.
493
494@item Automatic Licensing of Downstream Recipients.
495
496Each time you convey a covered work, the recipient automatically
497receives a license from the original licensors, to run, modify and
498propagate that work, subject to this License.  You are not responsible
499for enforcing compliance by third parties with this License.
500
501An ``entity transaction'' is a transaction transferring control of an
502organization, or substantially all assets of one, or subdividing an
503organization, or merging organizations.  If propagation of a covered
504work results from an entity transaction, each party to that
505transaction who receives a copy of the work also receives whatever
506licenses to the work the party's predecessor in interest had or could
507give under the previous paragraph, plus a right to possession of the
508Corresponding Source of the work from the predecessor in interest, if
509the predecessor has it or can get it with reasonable efforts.
510
511You may not impose any further restrictions on the exercise of the
512rights granted or affirmed under this License.  For example, you may
513not impose a license fee, royalty, or other charge for exercise of
514rights granted under this License, and you may not initiate litigation
515(including a cross-claim or counterclaim in a lawsuit) alleging that
516any patent claim is infringed by making, using, selling, offering for
517sale, or importing the Program or any portion of it.
518
519@item Patents.
520
521A ``contributor'' is a copyright holder who authorizes use under this
522License of the Program or a work on which the Program is based.  The
523work thus licensed is called the contributor's ``contributor version''.
524
525A contributor's ``essential patent claims'' are all patent claims owned
526or controlled by the contributor, whether already acquired or
527hereafter acquired, that would be infringed by some manner, permitted
528by this License, of making, using, or selling its contributor version,
529but do not include claims that would be infringed only as a
530consequence of further modification of the contributor version.  For
531purposes of this definition, ``control'' includes the right to grant
532patent sublicenses in a manner consistent with the requirements of
533this License.
534
535Each contributor grants you a non-exclusive, worldwide, royalty-free
536patent license under the contributor's essential patent claims, to
537make, use, sell, offer for sale, import and otherwise run, modify and
538propagate the contents of its contributor version.
539
540In the following three paragraphs, a ``patent license'' is any express
541agreement or commitment, however denominated, not to enforce a patent
542(such as an express permission to practice a patent or covenant not to
543sue for patent infringement).  To ``grant'' such a patent license to a
544party means to make such an agreement or commitment not to enforce a
545patent against the party.
546
547If you convey a covered work, knowingly relying on a patent license,
548and the Corresponding Source of the work is not available for anyone
549to copy, free of charge and under the terms of this License, through a
550publicly available network server or other readily accessible means,
551then you must either (1) cause the Corresponding Source to be so
552available, or (2) arrange to deprive yourself of the benefit of the
553patent license for this particular work, or (3) arrange, in a manner
554consistent with the requirements of this License, to extend the patent
555license to downstream recipients.  ``Knowingly relying'' means you have
556actual knowledge that, but for the patent license, your conveying the
557covered work in a country, or your recipient's use of the covered work
558in a country, would infringe one or more identifiable patents in that
559country that you have reason to believe are valid.
560
561If, pursuant to or in connection with a single transaction or
562arrangement, you convey, or propagate by procuring conveyance of, a
563covered work, and grant a patent license to some of the parties
564receiving the covered work authorizing them to use, propagate, modify
565or convey a specific copy of the covered work, then the patent license
566you grant is automatically extended to all recipients of the covered
567work and works based on it.
568
569A patent license is ``discriminatory'' if it does not include within the
570scope of its coverage, prohibits the exercise of, or is conditioned on
571the non-exercise of one or more of the rights that are specifically
572granted under this License.  You may not convey a covered work if you
573are a party to an arrangement with a third party that is in the
574business of distributing software, under which you make payment to the
575third party based on the extent of your activity of conveying the
576work, and under which the third party grants, to any of the parties
577who would receive the covered work from you, a discriminatory patent
578license (a) in connection with copies of the covered work conveyed by
579you (or copies made from those copies), or (b) primarily for and in
580connection with specific products or compilations that contain the
581covered work, unless you entered into that arrangement, or that patent
582license was granted, prior to 28 March 2007.
583
584Nothing in this License shall be construed as excluding or limiting
585any implied license or other defenses to infringement that may
586otherwise be available to you under applicable patent law.
587
588@item No Surrender of Others' Freedom.
589
590If conditions are imposed on you (whether by court order, agreement or
591otherwise) that contradict the conditions of this License, they do not
592excuse you from the conditions of this License.  If you cannot convey
593a covered work so as to satisfy simultaneously your obligations under
594this License and any other pertinent obligations, then as a
595consequence you may not convey it at all.  For example, if you agree
596to terms that obligate you to collect a royalty for further conveying
597from those to whom you convey the Program, the only way you could
598satisfy both those terms and this License would be to refrain entirely
599from conveying the Program.
600
601@item Use with the GNU Affero General Public License.
602
603Notwithstanding any other provision of this License, you have
604permission to link or combine any covered work with a work licensed
605under version 3 of the GNU Affero General Public License into a single
606combined work, and to convey the resulting work.  The terms of this
607License will continue to apply to the part which is the covered work,
608but the special requirements of the GNU Affero General Public License,
609section 13, concerning interaction through a network will apply to the
610combination as such.
611
612@item Revised Versions of this License.
613
614The Free Software Foundation may publish revised and/or new versions
615of the GNU General Public License from time to time.  Such new
616versions will be similar in spirit to the present version, but may
617differ in detail to address new problems or concerns.
618
619Each version is given a distinguishing version number.  If the Program
620specifies that a certain numbered version of the GNU General Public
621License ``or any later version'' applies to it, you have the option of
622following the terms and conditions either of that numbered version or
623of any later version published by the Free Software Foundation.  If
624the Program does not specify a version number of the GNU General
625Public License, you may choose any version ever published by the Free
626Software Foundation.
627
628If the Program specifies that a proxy can decide which future versions
629of the GNU General Public License can be used, that proxy's public
630statement of acceptance of a version permanently authorizes you to
631choose that version for the Program.
632
633Later license versions may give you additional or different
634permissions.  However, no additional obligations are imposed on any
635author or copyright holder as a result of your choosing to follow a
636later version.
637
638@item Disclaimer of Warranty.
639
640THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
641APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
642HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS'' WITHOUT
643WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
644LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
645A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND
646PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE
647DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
648CORRECTION.
649
650@item Limitation of Liability.
651
652IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
653WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
654CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
655INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
656ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
657NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
658LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
659TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
660PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
661
662@item Interpretation of Sections 15 and 16.
663
664If the disclaimer of warranty and limitation of liability provided
665above cannot be given local legal effect according to their terms,
666reviewing courts shall apply local law that most closely approximates
667an absolute waiver of all civil liability in connection with the
668Program, unless a warranty or assumption of liability accompanies a
669copy of the Program in return for a fee.
670
671@end enumerate
672
673@heading END OF TERMS AND CONDITIONS
674
675@heading How to Apply These Terms to Your New Programs
676
677If you develop a new program, and you want it to be of the greatest
678possible use to the public, the best way to achieve this is to make it
679free software which everyone can redistribute and change under these
680terms.
681
682To do so, attach the following notices to the program.  It is safest
683to attach them to the start of each source file to most effectively
684state the exclusion of warranty; and each file should have at least
685the ``copyright'' line and a pointer to where the full notice is found.
686
687@smallexample
688@var{one line to give the program's name and a brief idea of what it does.}
689Copyright (C) @var{year} @var{name of author}
690
691This program is free software: you can redistribute it and/or modify
692it under the terms of the GNU General Public License as published by
693the Free Software Foundation, either version 3 of the License, or (at
694your option) any later version.
695
696This program is distributed in the hope that it will be useful, but
697WITHOUT ANY WARRANTY; without even the implied warranty of
698MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
699General Public License for more details.
700
701You should have received a copy of the GNU General Public License
702along with this program.  If not, see @url{http://www.gnu.org/licenses/}.
703@end smallexample
704
705Also add information on how to contact you by electronic and paper mail.
706
707If the program does terminal interaction, make it output a short
708notice like this when it starts in an interactive mode:
709
710@smallexample
711@var{program} Copyright (C) @var{year} @var{name of author}
712This program comes with ABSOLUTELY NO WARRANTY; for details type @samp{show w}.
713This is free software, and you are welcome to redistribute it
714under certain conditions; type @samp{show c} for details.
715@end smallexample
716
717The hypothetical commands @samp{show w} and @samp{show c} should show
718the appropriate parts of the General Public License.  Of course, your
719program's commands might be different; for a GUI interface, you would
720use an ``about box''.
721
722You should also get your employer (if you work as a programmer) or school,
723if any, to sign a ``copyright disclaimer'' for the program, if necessary.
724For more information on this, and how to apply and follow the GNU GPL, see
725@url{http://www.gnu.org/licenses/}.
726
727The GNU General Public License does not permit incorporating your
728program into proprietary programs.  If your program is a subroutine
729library, you may consider it more useful to permit linking proprietary
730applications with the library.  If this is what you want to do, use
731the GNU Lesser General Public License instead of this License.  But
732first, please read @url{https://www.gnu.org/licenses/why-not-lgpl.html}.
733@c man end
734