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. @url{http://fsf.org/} 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@appendix GNU GENERAL PUBLIC LICENSE 18@c The GNU General Public License. 19@center Version 3, 29 June 2007 20 21@c This file is intended to be included within another document, 22@c hence no sectioning command or @node. 23 24@display 25Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/} 26 27Everyone is permitted to copy and distribute verbatim copies of this 28license document, but changing it is not allowed. 29@end display 30 31@heading Preamble 32 33The GNU General Public License is a free, copyleft license for 34software and other kinds of works. 35 36The licenses for most software and other practical works are designed 37to take away your freedom to share and change the works. By contrast, 38the GNU General Public License is intended to guarantee your freedom 39to share and change all versions of a program---to make sure it remains 40free software for all its users. We, the Free Software Foundation, 41use the GNU General Public License for most of our software; it 42applies also to any other work released this way by its authors. You 43can apply it to your programs, too. 44 45When we speak of free software, we are referring to freedom, not 46price. Our General Public Licenses are designed to make sure that you 47have the freedom to distribute copies of free software (and charge for 48them if you wish), that you receive source code or can get it if you 49want it, that you can change the software or use pieces of it in new 50free programs, and that you know you can do these things. 51 52To protect your rights, we need to prevent others from denying you 53these rights or asking you to surrender the rights. Therefore, you 54have certain responsibilities if you distribute copies of the 55software, or if you modify it: responsibilities to respect the freedom 56of others. 57 58For example, if you distribute copies of such a program, whether 59gratis or for a fee, you must pass on to the recipients the same 60freedoms that you received. You must make sure that they, too, 61receive or can get the source code. And you must show them these 62terms so they know their rights. 63 64Developers that use the GNU GPL protect your rights with two steps: 65(1) assert copyright on the software, and (2) offer you this License 66giving you legal permission to copy, distribute and/or modify it. 67 68For the developers' and authors' protection, the GPL clearly explains 69that there is no warranty for this free software. For both users' and 70authors' sake, the GPL requires that modified versions be marked as 71changed, so that their problems will not be attributed erroneously to 72authors of previous versions. 73 74Some devices are designed to deny users access to install or run 75modified versions of the software inside them, although the 76manufacturer can do so. This is fundamentally incompatible with the 77aim of protecting users' freedom to change the software. The 78systematic pattern of such abuse occurs in the area of products for 79individuals to use, which is precisely where it is most unacceptable. 80Therefore, we have designed this version of the GPL to prohibit the 81practice for those products. If such problems arise substantially in 82other domains, we stand ready to extend this provision to those 83domains in future versions of the GPL, as needed to protect the 84freedom of users. 85 86Finally, every program is threatened constantly by software patents. 87States should not allow patents to restrict development and use of 88software on general-purpose computers, but in those that do, we wish 89to avoid the special danger that patents applied to a free program 90could make it effectively proprietary. To prevent this, the GPL 91assures that patents cannot be used to render the program non-free. 92 93The precise terms and conditions for copying, distribution and 94modification follow. 95 96@heading TERMS AND CONDITIONS 97 98@enumerate 0 99@item Definitions. 100 101``This License'' refers to version 3 of the GNU General Public License. 102 103``Copyright'' also means copyright-like laws that apply to other kinds 104of works, such as semiconductor masks. 105 106``The Program'' refers to any copyrightable work licensed under this 107License. Each licensee is addressed as ``you''. ``Licensees'' and 108``recipients'' may be individuals or organizations. 109 110To ``modify'' a work means to copy from or adapt all or part of the work 111in a fashion requiring copyright permission, other than the making of 112an exact copy. The resulting work is called a ``modified version'' of 113the earlier work or a work ``based on'' the earlier work. 114 115A ``covered work'' means either the unmodified Program or a work based 116on the Program. 117 118To ``propagate'' a work means to do anything with it that, without 119permission, would make you directly or secondarily liable for 120infringement under applicable copyright law, except executing it on a 121computer or modifying a private copy. Propagation includes copying, 122distribution (with or without modification), making available to the 123public, and in some countries other activities as well. 124 125To ``convey'' a work means any kind of propagation that enables other 126parties to make or receive copies. Mere interaction with a user 127through a computer network, with no transfer of a copy, is not 128conveying. 129 130An interactive user interface displays ``Appropriate Legal Notices'' to 131the extent that it includes a convenient and prominently visible 132feature that (1) displays an appropriate copyright notice, and (2) 133tells the user that there is no warranty for the work (except to the 134extent that warranties are provided), that licensees may convey the 135work under this License, and how to view a copy of this License. If 136the interface presents a list of user commands or options, such as a 137menu, a prominent item in the list meets this criterion. 138 139@item Source Code. 140 141The ``source code'' for a work means the preferred form of the work for 142making modifications to it. ``Object code'' means any non-source form 143of a work. 144 145A ``Standard Interface'' means an interface that either is an official 146standard defined by a recognized standards body, or, in the case of 147interfaces specified for a particular programming language, one that 148is widely used among developers working in that language. 149 150The ``System Libraries'' of an executable work include anything, other 151than the work as a whole, that (a) is included in the normal form of 152packaging a Major Component, but which is not part of that Major 153Component, and (b) serves only to enable use of the work with that 154Major Component, or to implement a Standard Interface for which an 155implementation is available to the public in source code form. A 156``Major Component'', in this context, means a major essential component 157(kernel, window system, and so on) of the specific operating system 158(if any) on which the executable work runs, or a compiler used to 159produce the work, or an object code interpreter used to run it. 160 161The ``Corresponding Source'' for a work in object code form means all 162the source code needed to generate, install, and (for an executable 163work) run the object code and to modify the work, including scripts to 164control those activities. However, it does not include the work's 165System Libraries, or general-purpose tools or generally available free 166programs which are used unmodified in performing those activities but 167which are not part of the work. For example, Corresponding Source 168includes interface definition files associated with source files for 169the work, and the source code for shared libraries and dynamically 170linked subprograms that the work is specifically designed to require, 171such as by intimate data communication or control flow between those 172subprograms and other parts of the work. 173 174The Corresponding Source need not include anything that users can 175regenerate automatically from other parts of the Corresponding Source. 176 177The Corresponding Source for a work in source code form is that same 178work. 179 180@item Basic Permissions. 181 182All rights granted under this License are granted for the term of 183copyright on the Program, and are irrevocable provided the stated 184conditions are met. This License explicitly affirms your unlimited 185permission to run the unmodified Program. The output from running a 186covered work is covered by this License only if the output, given its 187content, constitutes a covered work. This License acknowledges your 188rights of fair use or other equivalent, as provided by copyright law. 189 190You may make, run and propagate covered works that you do not convey, 191without conditions so long as your license otherwise remains in force. 192You may convey covered works to others for the sole purpose of having 193them make modifications exclusively for you, or provide you with 194facilities for running those works, provided that you comply with the 195terms of this License in conveying all material for which you do not 196control copyright. Those thus making or running the covered works for 197you must do so exclusively on your behalf, under your direction and 198control, on terms that prohibit them from making any copies of your 199copyrighted material outside their relationship with you. 200 201Conveying under any other circumstances is permitted solely under the 202conditions stated below. Sublicensing is not allowed; section 10 203makes it unnecessary. 204 205@item Protecting Users' Legal Rights From Anti-Circumvention Law. 206 207No covered work shall be deemed part of an effective technological 208measure under any applicable law fulfilling obligations under article 20911 of the WIPO copyright treaty adopted on 20 December 1996, or 210similar laws prohibiting or restricting circumvention of such 211measures. 212 213When you convey a covered work, you waive any legal power to forbid 214circumvention of technological measures to the extent such 215circumvention is effected by exercising rights under this License with 216respect to the covered work, and you disclaim any intention to limit 217operation or modification of the work as a means of enforcing, against 218the work's users, your or third parties' legal rights to forbid 219circumvention of technological measures. 220 221@item Conveying Verbatim Copies. 222 223You may convey verbatim copies of the Program's source code as you 224receive it, in any medium, provided that you conspicuously and 225appropriately publish on each copy an appropriate copyright notice; 226keep intact all notices stating that this License and any 227non-permissive terms added in accord with section 7 apply to the code; 228keep intact all notices of the absence of any warranty; and give all 229recipients a copy of this License along with the Program. 230 231You may charge any price or no price for each copy that you convey, 232and you may offer support or warranty protection for a fee. 233 234@item Conveying Modified Source Versions. 235 236You may convey a work based on the Program, or the modifications to 237produce it from the Program, in the form of source code under the 238terms of section 4, provided that you also meet all of these 239conditions: 240 241@enumerate a 242@item 243The work must carry prominent notices stating that you modified it, 244and giving a relevant date. 245 246@item 247The work must carry prominent notices stating that it is released 248under this License and any conditions added under section 7. This 249requirement modifies the requirement in section 4 to ``keep intact all 250notices''. 251 252@item 253You must license the entire work, as a whole, under this License to 254anyone who comes into possession of a copy. This License will 255therefore apply, along with any applicable section 7 additional terms, 256to the whole of the work, and all its parts, regardless of how they 257are packaged. This License gives no permission to license the work in 258any other way, but it does not invalidate such permission if you have 259separately received it. 260 261@item 262If the work has interactive user interfaces, each must display 263Appropriate Legal Notices; however, if the Program has interactive 264interfaces that do not display Appropriate Legal Notices, your work 265need not make them do so. 266@end enumerate 267 268A compilation of a covered work with other separate and independent 269works, which are not by their nature extensions of the covered work, 270and which are not combined with it such as to form a larger program, 271in or on a volume of a storage or distribution medium, is called an 272``aggregate'' if the compilation and its resulting copyright are not 273used to limit the access or legal rights of the compilation's users 274beyond what the individual works permit. Inclusion of a covered work 275in an aggregate does not cause this License to apply to the other 276parts of the aggregate. 277 278@item Conveying Non-Source Forms. 279 280You may convey a covered work in object code form under the terms of 281sections 4 and 5, provided that you also convey the machine-readable 282Corresponding Source under the terms of this License, in one of these 283ways: 284 285@enumerate a 286@item 287Convey the object code in, or embodied in, a physical product 288(including a physical distribution medium), accompanied by the 289Corresponding Source fixed on a durable physical medium customarily 290used for software interchange. 291 292@item 293Convey the object code in, or embodied in, a physical product 294(including a physical distribution medium), accompanied by a written 295offer, valid for at least three years and valid for as long as you 296offer spare parts or customer support for that product model, to give 297anyone who possesses the object code either (1) a copy of the 298Corresponding Source for all the software in the product that is 299covered by this License, on a durable physical medium customarily used 300for software interchange, for a price no more than your reasonable 301cost of physically performing this conveying of source, or (2) access 302to copy the Corresponding Source from a network server at no charge. 303 304@item 305Convey individual copies of the object code with a copy of the written 306offer to provide the Corresponding Source. This alternative is 307allowed only occasionally and noncommercially, and only if you 308received the object code with such an offer, in accord with subsection 3096b. 310 311@item 312Convey the object code by offering access from a designated place 313(gratis or for a charge), and offer equivalent access to the 314Corresponding Source in the same way through the same place at no 315further charge. You need not require recipients to copy the 316Corresponding Source along with the object code. If the place to copy 317the object code is a network server, the Corresponding Source may be 318on a different server (operated by you or a third party) that supports 319equivalent copying facilities, provided you maintain clear directions 320next to the object code saying where to find the Corresponding Source. 321Regardless of what server hosts the Corresponding Source, you remain 322obligated to ensure that it is available for as long as needed to 323satisfy these requirements. 324 325@item 326Convey the object code using peer-to-peer transmission, provided you 327inform other peers where the object code and Corresponding Source of 328the work are being offered to the general public at no charge under 329subsection 6d. 330 331@end enumerate 332 333A separable portion of the object code, whose source code is excluded 334from the Corresponding Source as a System Library, need not be 335included in conveying the object code work. 336 337A ``User Product'' is either (1) a ``consumer product'', which means any 338tangible personal property which is normally used for personal, 339family, or household purposes, or (2) anything designed or sold for 340incorporation into a dwelling. In determining whether a product is a 341consumer product, doubtful cases shall be resolved in favor of 342coverage. For a particular product received by a particular user, 343``normally used'' refers to a typical or common use of that class of 344product, regardless of the status of the particular user or of the way 345in which the particular user actually uses, or expects or is expected 346to use, the product. A product is a consumer product regardless of 347whether the product has substantial commercial, industrial or 348non-consumer uses, unless such uses represent the only significant 349mode of use of the product. 350 351``Installation Information'' for a User Product means any methods, 352procedures, authorization keys, or other information required to 353install and execute modified versions of a covered work in that User 354Product from a modified version of its Corresponding Source. The 355information must suffice to ensure that the continued functioning of 356the modified object code is in no case prevented or interfered with 357solely because modification has been made. 358 359If you convey an object code work under this section in, or with, or 360specifically for use in, a User Product, and the conveying occurs as 361part of a transaction in which the right of possession and use of the 362User Product is transferred to the recipient in perpetuity or for a 363fixed term (regardless of how the transaction is characterized), the 364Corresponding Source conveyed under this section must be accompanied 365by the Installation Information. But this requirement does not apply 366if neither you nor any third party retains the ability to install 367modified object code on the User Product (for example, the work has 368been installed in ROM). 369 370The requirement to provide Installation Information does not include a 371requirement to continue to provide support service, warranty, or 372updates for a work that has been modified or installed by the 373recipient, or for the User Product in which it has been modified or 374installed. Access to a network may be denied when the modification 375itself materially and adversely affects the operation of the network 376or violates the rules and protocols for communication across the 377network. 378 379Corresponding Source conveyed, and Installation Information provided, 380in accord with this section must be in a format that is publicly 381documented (and with an implementation available to the public in 382source code form), and must require no special password or key for 383unpacking, reading or copying. 384 385@item Additional Terms. 386 387``Additional permissions'' are terms that supplement the terms of this 388License by making exceptions from one or more of its conditions. 389Additional permissions that are applicable to the entire Program shall 390be treated as though they were included in this License, to the extent 391that they are valid under applicable law. If additional permissions 392apply only to part of the Program, that part may be used separately 393under those permissions, but the entire Program remains governed by 394this License without regard to the additional permissions. 395 396When you convey a copy of a covered work, you may at your option 397remove any additional permissions from that copy, or from any part of 398it. (Additional permissions may be written to require their own 399removal in certain cases when you modify the work.) You may place 400additional permissions on material, added by you to a covered work, 401for which you have or can give appropriate copyright permission. 402 403Notwithstanding any other provision of this License, for material you 404add to a covered work, you may (if authorized by the copyright holders 405of that material) supplement the terms of this License with terms: 406 407@enumerate a 408@item 409Disclaiming warranty or limiting liability differently from the terms 410of sections 15 and 16 of this License; or 411 412@item 413Requiring preservation of specified reasonable legal notices or author 414attributions in that material or in the Appropriate Legal Notices 415displayed by works containing it; or 416 417@item 418Prohibiting misrepresentation of the origin of that material, or 419requiring that modified versions of such material be marked in 420reasonable ways as different from the original version; or 421 422@item 423Limiting the use for publicity purposes of names of licensors or 424authors of the material; or 425 426@item 427Declining to grant rights under trademark law for use of some trade 428names, trademarks, or service marks; or 429 430@item 431Requiring indemnification of licensors and authors of that material by 432anyone who conveys the material (or modified versions of it) with 433contractual assumptions of liability to the recipient, for any 434liability that these contractual assumptions directly impose on those 435licensors and authors. 436@end enumerate 437 438All other non-permissive additional terms are considered ``further 439restrictions'' within the meaning of section 10. If the Program as you 440received it, or any part of it, contains a notice stating that it is 441governed by this License along with a term that is a further 442restriction, you may remove that term. If a license document contains 443a further restriction but permits relicensing or conveying under this 444License, you may add to a covered work material governed by the terms 445of that license document, provided that the further restriction does 446not survive such relicensing or conveying. 447 448If you add terms to a covered work in accord with this section, you 449must place, in the relevant source files, a statement of the 450additional terms that apply to those files, or a notice indicating 451where to find the applicable terms. 452 453Additional terms, permissive or non-permissive, may be stated in the 454form of a separately written license, or stated as exceptions; the 455above requirements apply either way. 456 457@item Termination. 458 459You may not propagate or modify a covered work except as expressly 460provided under this License. Any attempt otherwise to propagate or 461modify it is void, and will automatically terminate your rights under 462this License (including any patent licenses granted under the third 463paragraph of section 11). 464 465However, if you cease all violation of this License, then your license 466from a particular copyright holder is reinstated (a) provisionally, 467unless and until the copyright holder explicitly and finally 468terminates your license, and (b) permanently, if the copyright holder 469fails to notify you of the violation by some reasonable means prior to 47060 days after the cessation. 471 472Moreover, your license from a particular copyright holder is 473reinstated permanently if the copyright holder notifies you of the 474violation by some reasonable means, this is the first time you have 475received notice of violation of this License (for any work) from that 476copyright holder, and you cure the violation prior to 30 days after 477your receipt of the notice. 478 479Termination of your rights under this section does not terminate the 480licenses of parties who have received copies or rights from you under 481this License. If your rights have been terminated and not permanently 482reinstated, you do not qualify to receive new licenses for the same 483material under section 10. 484 485@item Acceptance Not Required for Having Copies. 486 487You are not required to accept this License in order to receive or run 488a copy of the Program. Ancillary propagation of a covered work 489occurring solely as a consequence of using peer-to-peer transmission 490to receive a copy likewise does not require acceptance. However, 491nothing other than this License grants you permission to propagate or 492modify any covered work. These actions infringe copyright if you do 493not accept this License. Therefore, by modifying or propagating a 494covered work, you indicate your acceptance of this License to do so. 495 496@item Automatic Licensing of Downstream Recipients. 497 498Each time you convey a covered work, the recipient automatically 499receives a license from the original licensors, to run, modify and 500propagate that work, subject to this License. You are not responsible 501for enforcing compliance by third parties with this License. 502 503An ``entity transaction'' is a transaction transferring control of an 504organization, or substantially all assets of one, or subdividing an 505organization, or merging organizations. If propagation of a covered 506work results from an entity transaction, each party to that 507transaction who receives a copy of the work also receives whatever 508licenses to the work the party's predecessor in interest had or could 509give under the previous paragraph, plus a right to possession of the 510Corresponding Source of the work from the predecessor in interest, if 511the predecessor has it or can get it with reasonable efforts. 512 513You may not impose any further restrictions on the exercise of the 514rights granted or affirmed under this License. For example, you may 515not impose a license fee, royalty, or other charge for exercise of 516rights granted under this License, and you may not initiate litigation 517(including a cross-claim or counterclaim in a lawsuit) alleging that 518any patent claim is infringed by making, using, selling, offering for 519sale, or importing the Program or any portion of it. 520 521@item Patents. 522 523A ``contributor'' is a copyright holder who authorizes use under this 524License of the Program or a work on which the Program is based. The 525work thus licensed is called the contributor's ``contributor version''. 526 527A contributor's ``essential patent claims'' are all patent claims owned 528or controlled by the contributor, whether already acquired or 529hereafter acquired, that would be infringed by some manner, permitted 530by this License, of making, using, or selling its contributor version, 531but do not include claims that would be infringed only as a 532consequence of further modification of the contributor version. For 533purposes of this definition, ``control'' includes the right to grant 534patent sublicenses in a manner consistent with the requirements of 535this License. 536 537Each contributor grants you a non-exclusive, worldwide, royalty-free 538patent license under the contributor's essential patent claims, to 539make, use, sell, offer for sale, import and otherwise run, modify and 540propagate the contents of its contributor version. 541 542In the following three paragraphs, a ``patent license'' is any express 543agreement or commitment, however denominated, not to enforce a patent 544(such as an express permission to practice a patent or covenant not to 545sue for patent infringement). To ``grant'' such a patent license to a 546party means to make such an agreement or commitment not to enforce a 547patent against the party. 548 549If you convey a covered work, knowingly relying on a patent license, 550and the Corresponding Source of the work is not available for anyone 551to copy, free of charge and under the terms of this License, through a 552publicly available network server or other readily accessible means, 553then you must either (1) cause the Corresponding Source to be so 554available, or (2) arrange to deprive yourself of the benefit of the 555patent license for this particular work, or (3) arrange, in a manner 556consistent with the requirements of this License, to extend the patent 557license to downstream recipients. ``Knowingly relying'' means you have 558actual knowledge that, but for the patent license, your conveying the 559covered work in a country, or your recipient's use of the covered work 560in a country, would infringe one or more identifiable patents in that 561country that you have reason to believe are valid. 562 563If, pursuant to or in connection with a single transaction or 564arrangement, you convey, or propagate by procuring conveyance of, a 565covered work, and grant a patent license to some of the parties 566receiving the covered work authorizing them to use, propagate, modify 567or convey a specific copy of the covered work, then the patent license 568you grant is automatically extended to all recipients of the covered 569work and works based on it. 570 571A patent license is ``discriminatory'' if it does not include within the 572scope of its coverage, prohibits the exercise of, or is conditioned on 573the non-exercise of one or more of the rights that are specifically 574granted under this License. You may not convey a covered work if you 575are a party to an arrangement with a third party that is in the 576business of distributing software, under which you make payment to the 577third party based on the extent of your activity of conveying the 578work, and under which the third party grants, to any of the parties 579who would receive the covered work from you, a discriminatory patent 580license (a) in connection with copies of the covered work conveyed by 581you (or copies made from those copies), or (b) primarily for and in 582connection with specific products or compilations that contain the 583covered work, unless you entered into that arrangement, or that patent 584license was granted, prior to 28 March 2007. 585 586Nothing in this License shall be construed as excluding or limiting 587any implied license or other defenses to infringement that may 588otherwise be available to you under applicable patent law. 589 590@item No Surrender of Others' Freedom. 591 592If conditions are imposed on you (whether by court order, agreement or 593otherwise) that contradict the conditions of this License, they do not 594excuse you from the conditions of this License. If you cannot convey 595a covered work so as to satisfy simultaneously your obligations under 596this License and any other pertinent obligations, then as a 597consequence you may not convey it at all. For example, if you agree 598to terms that obligate you to collect a royalty for further conveying 599from those to whom you convey the Program, the only way you could 600satisfy both those terms and this License would be to refrain entirely 601from conveying the Program. 602 603@item Use with the GNU Affero General Public License. 604 605Notwithstanding any other provision of this License, you have 606permission to link or combine any covered work with a work licensed 607under version 3 of the GNU Affero General Public License into a single 608combined work, and to convey the resulting work. The terms of this 609License will continue to apply to the part which is the covered work, 610but the special requirements of the GNU Affero General Public License, 611section 13, concerning interaction through a network will apply to the 612combination as such. 613 614@item Revised Versions of this License. 615 616The Free Software Foundation may publish revised and/or new versions 617of the GNU General Public License from time to time. Such new 618versions will be similar in spirit to the present version, but may 619differ in detail to address new problems or concerns. 620 621Each version is given a distinguishing version number. If the Program 622specifies that a certain numbered version of the GNU General Public 623License ``or any later version'' applies to it, you have the option of 624following the terms and conditions either of that numbered version or 625of any later version published by the Free Software Foundation. If 626the Program does not specify a version number of the GNU General 627Public License, you may choose any version ever published by the Free 628Software Foundation. 629 630If the Program specifies that a proxy can decide which future versions 631of the GNU General Public License can be used, that proxy's public 632statement of acceptance of a version permanently authorizes you to 633choose that version for the Program. 634 635Later license versions may give you additional or different 636permissions. However, no additional obligations are imposed on any 637author or copyright holder as a result of your choosing to follow a 638later version. 639 640@item Disclaimer of Warranty. 641 642THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 643APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 644HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS'' WITHOUT 645WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT 646LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 647A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND 648PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE 649DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR 650CORRECTION. 651 652@item Limitation of Liability. 653 654IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 655WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR 656CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 657INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES 658ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT 659NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR 660LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM 661TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER 662PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 663 664@item Interpretation of Sections 15 and 16. 665 666If the disclaimer of warranty and limitation of liability provided 667above cannot be given local legal effect according to their terms, 668reviewing courts shall apply local law that most closely approximates 669an absolute waiver of all civil liability in connection with the 670Program, unless a warranty or assumption of liability accompanies a 671copy of the Program in return for a fee. 672 673@end enumerate 674 675@heading END OF TERMS AND CONDITIONS 676 677@heading How to Apply These Terms to Your New Programs 678 679If you develop a new program, and you want it to be of the greatest 680possible use to the public, the best way to achieve this is to make it 681free software which everyone can redistribute and change under these 682terms. 683 684To do so, attach the following notices to the program. It is safest 685to attach them to the start of each source file to most effectively 686state the exclusion of warranty; and each file should have at least 687the ``copyright'' line and a pointer to where the full notice is found. 688 689@smallexample 690@var{one line to give the program's name and a brief idea of what it does.} 691Copyright (C) @var{year} @var{name of author} 692 693This program is free software: you can redistribute it and/or modify 694it under the terms of the GNU General Public License as published by 695the Free Software Foundation, either version 3 of the License, or (at 696your option) any later version. 697 698This program is distributed in the hope that it will be useful, but 699WITHOUT ANY WARRANTY; without even the implied warranty of 700MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 701General Public License for more details. 702 703You should have received a copy of the GNU General Public License 704along with this program. If not, see @url{http://www.gnu.org/licenses/}. 705@end smallexample 706 707Also add information on how to contact you by electronic and paper mail. 708 709If the program does terminal interaction, make it output a short 710notice like this when it starts in an interactive mode: 711 712@smallexample 713@var{program} Copyright (C) @var{year} @var{name of author} 714This program comes with ABSOLUTELY NO WARRANTY; for details type @samp{show w}. 715This is free software, and you are welcome to redistribute it 716under certain conditions; type @samp{show c} for details. 717@end smallexample 718 719The hypothetical commands @samp{show w} and @samp{show c} should show 720the appropriate parts of the General Public License. Of course, your 721program's commands might be different; for a GUI interface, you would 722use an ``about box''. 723 724You should also get your employer (if you work as a programmer) or school, 725if any, to sign a ``copyright disclaimer'' for the program, if necessary. 726For more information on this, and how to apply and follow the GNU GPL, see 727@url{http://www.gnu.org/licenses/}. 728 729The GNU General Public License does not permit incorporating your 730program into proprietary programs. If your program is a subroutine 731library, you may consider it more useful to permit linking proprietary 732applications with the library. If this is what you want to do, use 733the GNU Lesser General Public License instead of this License. But 734first, please read @url{http://www.gnu.org/philosophy/why-not-lgpl.html}. 735@c man end 736