COPYING revision 0fbdf6cbd4dfc633454eba2f841c123789e297ad
1The tools for F2FS are covered by GNU Public License version 2. 2Exceptionally, the following files are also covered by the GNU Library General 3Public License Version 2 as the dual licenses. 4- include/f2fs_fs.h 5- lib/libf2fs.c 6- lib/libf2fs_io.c 7- mkfs/f2fs_format.c 8- mkfs/f2fs_format_main.c 9- mkfs/f2fs_format_utils.c 10- mkfs/f2fs_format_utils.h 11 12================================================================================ 13Copyright (c) 2012 Samsung Electronics Co., Ltd. 14 http://www.samsung.com/ 15 16This program is free software; you can redistribute it and/or modify 17it under the terms of the GNU General Public License version 2 as 18published by the Free Software Foundation. 19 20================================================================================ 21 GNU GENERAL PUBLIC LICENSE 22 Version 2, June 1991 23 24 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 25 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 26 Everyone is permitted to copy and distribute verbatim copies 27 of this license document, but changing it is not allowed. 28 29 Preamble 30 31 The licenses for most software are designed to take away your 32freedom to share and change it. By contrast, the GNU General Public 33License is intended to guarantee your freedom to share and change free 34software--to make sure the software is free for all its users. This 35General Public License applies to most of the Free Software 36Foundation's software and to any other program whose authors commit to 37using it. (Some other Free Software Foundation software is covered by 38the GNU Library General Public License instead.) You can apply it to 39your programs, too. 40 41 When we speak of free software, we are referring to freedom, not 42price. Our General Public Licenses are designed to make sure that you 43have the freedom to distribute copies of free software (and charge for 44this service if you wish), that you receive source code or can get it 45if you want it, that you can change the software or use pieces of it 46in new free programs; and that you know you can do these things. 47 48 To protect your rights, we need to make restrictions that forbid 49anyone to deny you these rights or to ask you to surrender the rights. 50These restrictions translate to certain responsibilities for you if you 51distribute copies of the software, or if you modify it. 52 53 For example, if you distribute copies of such a program, whether 54gratis or for a fee, you must give the recipients all the rights that 55you have. You must make sure that they, too, receive or can get the 56source code. And you must show them these terms so they know their 57rights. 58 59 We protect your rights with two steps: (1) copyright the software, and 60(2) offer you this license which gives you legal permission to copy, 61distribute and/or modify the software. 62 63 Also, for each author's protection and ours, we want to make certain 64that everyone understands that there is no warranty for this free 65software. If the software is modified by someone else and passed on, we 66want its recipients to know that what they have is not the original, so 67that any problems introduced by others will not reflect on the original 68authors' reputations. 69 70 Finally, any free program is threatened constantly by software 71patents. We wish to avoid the danger that redistributors of a free 72program will individually obtain patent licenses, in effect making the 73program proprietary. To prevent this, we have made it clear that any 74patent must be licensed for everyone's free use or not licensed at all. 75 76 The precise terms and conditions for copying, distribution and 77modification follow. 78 79 GNU GENERAL PUBLIC LICENSE 80 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 81 82 0. This License applies to any program or other work which contains 83a notice placed by the copyright holder saying it may be distributed 84under the terms of this General Public License. The "Program", below, 85refers to any such program or work, and a "work based on the Program" 86means either the Program or any derivative work under copyright law: 87that is to say, a work containing the Program or a portion of it, 88either verbatim or with modifications and/or translated into another 89language. (Hereinafter, translation is included without limitation in 90the term "modification".) Each licensee is addressed as "you". 91 92Activities other than copying, distribution and modification are not 93covered by this License; they are outside its scope. The act of 94running the Program is not restricted, and the output from the Program 95is covered only if its contents constitute a work based on the 96Program (independent of having been made by running the Program). 97Whether that is true depends on what the Program does. 98 99 1. You may copy and distribute verbatim copies of the Program's 100source code as you receive it, in any medium, provided that you 101conspicuously and appropriately publish on each copy an appropriate 102copyright notice and disclaimer of warranty; keep intact all the 103notices that refer to this License and to the absence of any warranty; 104and give any other recipients of the Program a copy of this License 105along with the Program. 106 107You may charge a fee for the physical act of transferring a copy, and 108you may at your option offer warranty protection in exchange for a fee. 109 110 2. You may modify your copy or copies of the Program or any portion 111of it, thus forming a work based on the Program, and copy and 112distribute such modifications or work under the terms of Section 1 113above, provided that you also meet all of these conditions: 114 115 a) You must cause the modified files to carry prominent notices 116 stating that you changed the files and the date of any change. 117 118 b) You must cause any work that you distribute or publish, that in 119 whole or in part contains or is derived from the Program or any 120 part thereof, to be licensed as a whole at no charge to all third 121 parties under the terms of this License. 122 123 c) If the modified program normally reads commands interactively 124 when run, you must cause it, when started running for such 125 interactive use in the most ordinary way, to print or display an 126 announcement including an appropriate copyright notice and a 127 notice that there is no warranty (or else, saying that you provide 128 a warranty) and that users may redistribute the program under 129 these conditions, and telling the user how to view a copy of this 130 License. (Exception: if the Program itself is interactive but 131 does not normally print such an announcement, your work based on 132 the Program is not required to print an announcement.) 133 134These requirements apply to the modified work as a whole. If 135identifiable sections of that work are not derived from the Program, 136and can be reasonably considered independent and separate works in 137themselves, then this License, and its terms, do not apply to those 138sections when you distribute them as separate works. But when you 139distribute the same sections as part of a whole which is a work based 140on the Program, the distribution of the whole must be on the terms of 141this License, whose permissions for other licensees extend to the 142entire whole, and thus to each and every part regardless of who wrote it. 143 144Thus, it is not the intent of this section to claim rights or contest 145your rights to work written entirely by you; rather, the intent is to 146exercise the right to control the distribution of derivative or 147collective works based on the Program. 148 149In addition, mere aggregation of another work not based on the Program 150with the Program (or with a work based on the Program) on a volume of 151a storage or distribution medium does not bring the other work under 152the scope of this License. 153 154 3. You may copy and distribute the Program (or a work based on it, 155under Section 2) in object code or executable form under the terms of 156Sections 1 and 2 above provided that you also do one of the following: 157 158 a) Accompany it with the complete corresponding machine-readable 159 source code, which must be distributed under the terms of Sections 160 1 and 2 above on a medium customarily used for software interchange; or, 161 162 b) Accompany it with a written offer, valid for at least three 163 years, to give any third party, for a charge no more than your 164 cost of physically performing source distribution, a complete 165 machine-readable copy of the corresponding source code, to be 166 distributed under the terms of Sections 1 and 2 above on a medium 167 customarily used for software interchange; or, 168 169 c) Accompany it with the information you received as to the offer 170 to distribute corresponding source code. (This alternative is 171 allowed only for noncommercial distribution and only if you 172 received the program in object code or executable form with such 173 an offer, in accord with Subsection b above.) 174 175The source code for a work means the preferred form of the work for 176making modifications to it. For an executable work, complete source 177code means all the source code for all modules it contains, plus any 178associated interface definition files, plus the scripts used to 179control compilation and installation of the executable. However, as a 180special exception, the source code distributed need not include 181anything that is normally distributed (in either source or binary 182form) with the major components (compiler, kernel, and so on) of the 183operating system on which the executable runs, unless that component 184itself accompanies the executable. 185 186If distribution of executable or object code is made by offering 187access to copy from a designated place, then offering equivalent 188access to copy the source code from the same place counts as 189distribution of the source code, even though third parties are not 190compelled to copy the source along with the object code. 191 192 4. You may not copy, modify, sublicense, or distribute the Program 193except as expressly provided under this License. Any attempt 194otherwise to copy, modify, sublicense or distribute the Program is 195void, and will automatically terminate your rights under this License. 196However, parties who have received copies, or rights, from you under 197this License will not have their licenses terminated so long as such 198parties remain in full compliance. 199 200 5. You are not required to accept this License, since you have not 201signed it. However, nothing else grants you permission to modify or 202distribute the Program or its derivative works. These actions are 203prohibited by law if you do not accept this License. Therefore, by 204modifying or distributing the Program (or any work based on the 205Program), you indicate your acceptance of this License to do so, and 206all its terms and conditions for copying, distributing or modifying 207the Program or works based on it. 208 209 6. Each time you redistribute the Program (or any work based on the 210Program), the recipient automatically receives a license from the 211original licensor to copy, distribute or modify the Program subject to 212these terms and conditions. You may not impose any further 213restrictions on the recipients' exercise of the rights granted herein. 214You are not responsible for enforcing compliance by third parties to 215this License. 216 217 7. If, as a consequence of a court judgment or allegation of patent 218infringement or for any other reason (not limited to patent issues), 219conditions are imposed on you (whether by court order, agreement or 220otherwise) that contradict the conditions of this License, they do not 221excuse you from the conditions of this License. If you cannot 222distribute so as to satisfy simultaneously your obligations under this 223License and any other pertinent obligations, then as a consequence you 224may not distribute the Program at all. For example, if a patent 225license would not permit royalty-free redistribution of the Program by 226all those who receive copies directly or indirectly through you, then 227the only way you could satisfy both it and this License would be to 228refrain entirely from distribution of the Program. 229 230If any portion of this section is held invalid or unenforceable under 231any particular circumstance, the balance of the section is intended to 232apply and the section as a whole is intended to apply in other 233circumstances. 234 235It is not the purpose of this section to induce you to infringe any 236patents or other property right claims or to contest validity of any 237such claims; this section has the sole purpose of protecting the 238integrity of the free software distribution system, which is 239implemented by public license practices. Many people have made 240generous contributions to the wide range of software distributed 241through that system in reliance on consistent application of that 242system; it is up to the author/donor to decide if he or she is willing 243to distribute software through any other system and a licensee cannot 244impose that choice. 245 246This section is intended to make thoroughly clear what is believed to 247be a consequence of the rest of this License. 248 249 8. If the distribution and/or use of the Program is restricted in 250certain countries either by patents or by copyrighted interfaces, the 251original copyright holder who places the Program under this License 252may add an explicit geographical distribution limitation excluding 253those countries, so that distribution is permitted only in or among 254countries not thus excluded. In such case, this License incorporates 255the limitation as if written in the body of this License. 256 257 9. The Free Software Foundation may publish revised and/or new versions 258of the General Public License from time to time. Such new versions will 259be similar in spirit to the present version, but may differ in detail to 260address new problems or concerns. 261 262Each version is given a distinguishing version number. If the Program 263specifies a version number of this License which applies to it and "any 264later version", you have the option of following the terms and conditions 265either of that version or of any later version published by the Free 266Software Foundation. If the Program does not specify a version number of 267this License, you may choose any version ever published by the Free Software 268Foundation. 269 270 10. If you wish to incorporate parts of the Program into other free 271programs whose distribution conditions are different, write to the author 272to ask for permission. For software which is copyrighted by the Free 273Software Foundation, write to the Free Software Foundation; we sometimes 274make exceptions for this. Our decision will be guided by the two goals 275of preserving the free status of all derivatives of our free software and 276of promoting the sharing and reuse of software generally. 277 278 NO WARRANTY 279 280 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 281FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 282OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 283PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 284OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 285MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 286TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 287PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 288REPAIR OR CORRECTION. 289 290 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 291WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 292REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 293INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 294OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 295TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 296YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 297PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 298POSSIBILITY OF SUCH DAMAGES. 299 300 END OF TERMS AND CONDITIONS 301 302 How to Apply These Terms to Your New Programs 303 304 If you develop a new program, and you want it to be of the greatest 305possible use to the public, the best way to achieve this is to make it 306free software which everyone can redistribute and change under these terms. 307 308 To do so, attach the following notices to the program. It is safest 309to attach them to the start of each source file to most effectively 310convey the exclusion of warranty; and each file should have at least 311the "copyright" line and a pointer to where the full notice is found. 312 313 <one line to give the program's name and a brief idea of what it does.> 314 Copyright (C) <year> <name of author> 315 316 This program is free software; you can redistribute it and/or modify 317 it under the terms of the GNU General Public License as published by 318 the Free Software Foundation; either version 2 of the License, or 319 (at your option) any later version. 320 321 This program is distributed in the hope that it will be useful, 322 but WITHOUT ANY WARRANTY; without even the implied warranty of 323 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 324 GNU General Public License for more details. 325 326 You should have received a copy of the GNU General Public License 327 along with this program; if not, write to the Free Software 328 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 329 330 331Also add information on how to contact you by electronic and paper mail. 332 333If the program is interactive, make it output a short notice like this 334when it starts in an interactive mode: 335 336 Gnomovision version 69, Copyright (C) year name of author 337 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 338 This is free software, and you are welcome to redistribute it 339 under certain conditions; type `show c' for details. 340 341The hypothetical commands `show w' and `show c' should show the appropriate 342parts of the General Public License. Of course, the commands you use may 343be called something other than `show w' and `show c'; they could even be 344mouse-clicks or menu items--whatever suits your program. 345 346You should also get your employer (if you work as a programmer) or your 347school, if any, to sign a "copyright disclaimer" for the program, if 348necessary. Here is a sample; alter the names: 349 350 Yoyodyne, Inc., hereby disclaims all copyright interest in the program 351 `Gnomovision' (which makes passes at compilers) written by James Hacker. 352 353 <signature of Ty Coon>, 1 April 1989 354 Ty Coon, President of Vice 355 356This General Public License does not permit incorporating your program into 357proprietary programs. If your program is a subroutine library, you may 358consider it more useful to permit linking proprietary applications with the 359library. If this is what you want to do, use the GNU Library General 360Public License instead of this License. 361 362================================================================================ 363 GNU LIBRARY GENERAL PUBLIC LICENSE 364 Version 2, June 1991 365 366 Copyright (C) 1991 Free Software Foundation, Inc. 367 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 368 Everyone is permitted to copy and distribute verbatim copies 369 of this license document, but changing it is not allowed. 370 371[This is the first released version of the library GPL. It is 372 numbered 2 because it goes with version 2 of the ordinary GPL.] 373 374 Preamble 375 376 The licenses for most software are designed to take away your 377freedom to share and change it. By contrast, the GNU General Public 378Licenses are intended to guarantee your freedom to share and change 379free software--to make sure the software is free for all its users. 380 381 This license, the Library General Public License, applies to some 382specially designated Free Software Foundation software, and to any 383other libraries whose authors decide to use it. You can use it for 384your libraries, too. 385 386 When we speak of free software, we are referring to freedom, not 387price. Our General Public Licenses are designed to make sure that you 388have the freedom to distribute copies of free software (and charge for 389this service if you wish), that you receive source code or can get it 390if you want it, that you can change the software or use pieces of it 391in new free programs; and that you know you can do these things. 392 393 To protect your rights, we need to make restrictions that forbid 394anyone to deny you these rights or to ask you to surrender the rights. 395These restrictions translate to certain responsibilities for you if 396you distribute copies of the library, or if you modify it. 397 398 For example, if you distribute copies of the library, whether gratis 399or for a fee, you must give the recipients all the rights that we gave 400you. You must make sure that they, too, receive or can get the source 401code. If you link a program with the library, you must provide 402complete object files to the recipients so that they can relink them 403with the library, after making changes to the library and recompiling 404it. And you must show them these terms so they know their rights. 405 406 Our method of protecting your rights has two steps: (1) copyright 407the library, and (2) offer you this license which gives you legal 408permission to copy, distribute and/or modify the library. 409 410 Also, for each distributor's protection, we want to make certain 411that everyone understands that there is no warranty for this free 412library. If the library is modified by someone else and passed on, we 413want its recipients to know that what they have is not the original 414version, so that any problems introduced by others will not reflect on 415the original authors' reputations. 416 417 Finally, any free program is threatened constantly by software 418patents. We wish to avoid the danger that companies distributing free 419software will individually obtain patent licenses, thus in effect 420transforming the program into proprietary software. To prevent this, 421we have made it clear that any patent must be licensed for everyone's 422free use or not licensed at all. 423 424 Most GNU software, including some libraries, is covered by the ordinary 425GNU General Public License, which was designed for utility programs. This 426license, the GNU Library General Public License, applies to certain 427designated libraries. This license is quite different from the ordinary 428one; be sure to read it in full, and don't assume that anything in it is 429the same as in the ordinary license. 430 431 The reason we have a separate public license for some libraries is that 432they blur the distinction we usually make between modifying or adding to a 433program and simply using it. Linking a program with a library, without 434changing the library, is in some sense simply using the library, and is 435analogous to running a utility program or application program. However, in 436a textual and legal sense, the linked executable is a combined work, a 437derivative of the original library, and the ordinary General Public License 438treats it as such. 439 440 Because of this blurred distinction, using the ordinary General 441Public License for libraries did not effectively promote software 442sharing, because most developers did not use the libraries. We 443concluded that weaker conditions might promote sharing better. 444 445 However, unrestricted linking of non-free programs would deprive the 446users of those programs of all benefit from the free status of the 447libraries themselves. This Library General Public License is intended to 448permit developers of non-free programs to use free libraries, while 449preserving your freedom as a user of such programs to change the free 450libraries that are incorporated in them. (We have not seen how to achieve 451this as regards changes in header files, but we have achieved it as regards 452changes in the actual functions of the Library.) The hope is that this 453will lead to faster development of free libraries. 454 455 The precise terms and conditions for copying, distribution and 456modification follow. Pay close attention to the difference between a 457"work based on the library" and a "work that uses the library". The 458former contains code derived from the library, while the latter only 459works together with the library. 460 461 Note that it is possible for a library to be covered by the ordinary 462General Public License rather than by this special one. 463 464 GNU LIBRARY GENERAL PUBLIC LICENSE 465 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 466 467 0. This License Agreement applies to any software library which 468contains a notice placed by the copyright holder or other authorized 469party saying it may be distributed under the terms of this Library 470General Public License (also called "this License"). Each licensee is 471addressed as "you". 472 473 A "library" means a collection of software functions and/or data 474prepared so as to be conveniently linked with application programs 475(which use some of those functions and data) to form executables. 476 477 The "Library", below, refers to any such software library or work 478which has been distributed under these terms. A "work based on the 479Library" means either the Library or any derivative work under 480copyright law: that is to say, a work containing the Library or a 481portion of it, either verbatim or with modifications and/or translated 482straightforwardly into another language. (Hereinafter, translation is 483included without limitation in the term "modification".) 484 485 "Source code" for a work means the preferred form of the work for 486making modifications to it. For a library, complete source code means 487all the source code for all modules it contains, plus any associated 488interface definition files, plus the scripts used to control compilation 489and installation of the library. 490 491 Activities other than copying, distribution and modification are not 492covered by this License; they are outside its scope. The act of 493running a program using the Library is not restricted, and output from 494such a program is covered only if its contents constitute a work based 495on the Library (independent of the use of the Library in a tool for 496writing it). Whether that is true depends on what the Library does 497and what the program that uses the Library does. 498 499 1. You may copy and distribute verbatim copies of the Library's 500complete source code as you receive it, in any medium, provided that 501you conspicuously and appropriately publish on each copy an 502appropriate copyright notice and disclaimer of warranty; keep intact 503all the notices that refer to this License and to the absence of any 504warranty; and distribute a copy of this License along with the 505Library. 506 507 You may charge a fee for the physical act of transferring a copy, 508and you may at your option offer warranty protection in exchange for a 509fee. 510 511 2. You may modify your copy or copies of the Library or any portion 512of it, thus forming a work based on the Library, and copy and 513distribute such modifications or work under the terms of Section 1 514above, provided that you also meet all of these conditions: 515 516 a) The modified work must itself be a software library. 517 518 b) You must cause the files modified to carry prominent notices 519 stating that you changed the files and the date of any change. 520 521 c) You must cause the whole of the work to be licensed at no 522 charge to all third parties under the terms of this License. 523 524 d) If a facility in the modified Library refers to a function or a 525 table of data to be supplied by an application program that uses 526 the facility, other than as an argument passed when the facility 527 is invoked, then you must make a good faith effort to ensure that, 528 in the event an application does not supply such function or 529 table, the facility still operates, and performs whatever part of 530 its purpose remains meaningful. 531 532 (For example, a function in a library to compute square roots has 533 a purpose that is entirely well-defined independent of the 534 application. Therefore, Subsection 2d requires that any 535 application-supplied function or table used by this function must 536 be optional: if the application does not supply it, the square 537 root function must still compute square roots.) 538 539These requirements apply to the modified work as a whole. If 540identifiable sections of that work are not derived from the Library, 541and can be reasonably considered independent and separate works in 542themselves, then this License, and its terms, do not apply to those 543sections when you distribute them as separate works. But when you 544distribute the same sections as part of a whole which is a work based 545on the Library, the distribution of the whole must be on the terms of 546this License, whose permissions for other licensees extend to the 547entire whole, and thus to each and every part regardless of who wrote 548it. 549 550Thus, it is not the intent of this section to claim rights or contest 551your rights to work written entirely by you; rather, the intent is to 552exercise the right to control the distribution of derivative or 553collective works based on the Library. 554 555In addition, mere aggregation of another work not based on the Library 556with the Library (or with a work based on the Library) on a volume of 557a storage or distribution medium does not bring the other work under 558the scope of this License. 559 560 3. You may opt to apply the terms of the ordinary GNU General Public 561License instead of this License to a given copy of the Library. To do 562this, you must alter all the notices that refer to this License, so 563that they refer to the ordinary GNU General Public License, version 2, 564instead of to this License. (If a newer version than version 2 of the 565ordinary GNU General Public License has appeared, then you can specify 566that version instead if you wish.) Do not make any other change in 567these notices. 568 569 Once this change is made in a given copy, it is irreversible for 570that copy, so the ordinary GNU General Public License applies to all 571subsequent copies and derivative works made from that copy. 572 573 This option is useful when you wish to copy part of the code of 574the Library into a program that is not a library. 575 576 4. You may copy and distribute the Library (or a portion or 577derivative of it, under Section 2) in object code or executable form 578under the terms of Sections 1 and 2 above provided that you accompany 579it with the complete corresponding machine-readable source code, which 580must be distributed under the terms of Sections 1 and 2 above on a 581medium customarily used for software interchange. 582 583 If distribution of object code is made by offering access to copy 584from a designated place, then offering equivalent access to copy the 585source code from the same place satisfies the requirement to 586distribute the source code, even though third parties are not 587compelled to copy the source along with the object code. 588 589 5. A program that contains no derivative of any portion of the 590Library, but is designed to work with the Library by being compiled or 591linked with it, is called a "work that uses the Library". Such a 592work, in isolation, is not a derivative work of the Library, and 593therefore falls outside the scope of this License. 594 595 However, linking a "work that uses the Library" with the Library 596creates an executable that is a derivative of the Library (because it 597contains portions of the Library), rather than a "work that uses the 598library". The executable is therefore covered by this License. 599Section 6 states terms for distribution of such executables. 600 601 When a "work that uses the Library" uses material from a header file 602that is part of the Library, the object code for the work may be a 603derivative work of the Library even though the source code is not. 604Whether this is true is especially significant if the work can be 605linked without the Library, or if the work is itself a library. The 606threshold for this to be true is not precisely defined by law. 607 608 If such an object file uses only numerical parameters, data 609structure layouts and accessors, and small macros and small inline 610functions (ten lines or less in length), then the use of the object 611file is unrestricted, regardless of whether it is legally a derivative 612work. (Executables containing this object code plus portions of the 613Library will still fall under Section 6.) 614 615 Otherwise, if the work is a derivative of the Library, you may 616distribute the object code for the work under the terms of Section 6. 617Any executables containing that work also fall under Section 6, 618whether or not they are linked directly with the Library itself. 619 620 6. As an exception to the Sections above, you may also compile or 621link a "work that uses the Library" with the Library to produce a 622work containing portions of the Library, and distribute that work 623under terms of your choice, provided that the terms permit 624modification of the work for the customer's own use and reverse 625engineering for debugging such modifications. 626 627 You must give prominent notice with each copy of the work that the 628Library is used in it and that the Library and its use are covered by 629this License. You must supply a copy of this License. If the work 630during execution displays copyright notices, you must include the 631copyright notice for the Library among them, as well as a reference 632directing the user to the copy of this License. Also, you must do one 633of these things: 634 635 a) Accompany the work with the complete corresponding 636 machine-readable source code for the Library including whatever 637 changes were used in the work (which must be distributed under 638 Sections 1 and 2 above); and, if the work is an executable linked 639 with the Library, with the complete machine-readable "work that 640 uses the Library", as object code and/or source code, so that the 641 user can modify the Library and then relink to produce a modified 642 executable containing the modified Library. (It is understood 643 that the user who changes the contents of definitions files in the 644 Library will not necessarily be able to recompile the application 645 to use the modified definitions.) 646 647 b) Accompany the work with a written offer, valid for at 648 least three years, to give the same user the materials 649 specified in Subsection 6a, above, for a charge no more 650 than the cost of performing this distribution. 651 652 c) If distribution of the work is made by offering access to copy 653 from a designated place, offer equivalent access to copy the above 654 specified materials from the same place. 655 656 d) Verify that the user has already received a copy of these 657 materials or that you have already sent this user a copy. 658 659 For an executable, the required form of the "work that uses the 660Library" must include any data and utility programs needed for 661reproducing the executable from it. However, as a special exception, 662the source code distributed need not include anything that is normally 663distributed (in either source or binary form) with the major 664components (compiler, kernel, and so on) of the operating system on 665which the executable runs, unless that component itself accompanies 666the executable. 667 668 It may happen that this requirement contradicts the license 669restrictions of other proprietary libraries that do not normally 670accompany the operating system. Such a contradiction means you cannot 671use both them and the Library together in an executable that you 672distribute. 673 674 7. You may place library facilities that are a work based on the 675Library side-by-side in a single library together with other library 676facilities not covered by this License, and distribute such a combined 677library, provided that the separate distribution of the work based on 678the Library and of the other library facilities is otherwise 679permitted, and provided that you do these two things: 680 681 a) Accompany the combined library with a copy of the same work 682 based on the Library, uncombined with any other library 683 facilities. This must be distributed under the terms of the 684 Sections above. 685 686 b) Give prominent notice with the combined library of the fact 687 that part of it is a work based on the Library, and explaining 688 where to find the accompanying uncombined form of the same work. 689 690 8. You may not copy, modify, sublicense, link with, or distribute 691the Library except as expressly provided under this License. Any 692attempt otherwise to copy, modify, sublicense, link with, or 693distribute the Library is void, and will automatically terminate your 694rights under this License. However, parties who have received copies, 695or rights, from you under this License will not have their licenses 696terminated so long as such parties remain in full compliance. 697 698 9. You are not required to accept this License, since you have not 699signed it. However, nothing else grants you permission to modify or 700distribute the Library or its derivative works. These actions are 701prohibited by law if you do not accept this License. Therefore, by 702modifying or distributing the Library (or any work based on the 703Library), you indicate your acceptance of this License to do so, and 704all its terms and conditions for copying, distributing or modifying 705the Library or works based on it. 706 707 10. Each time you redistribute the Library (or any work based on the 708Library), the recipient automatically receives a license from the 709original licensor to copy, distribute, link with or modify the Library 710subject to these terms and conditions. You may not impose any further 711restrictions on the recipients' exercise of the rights granted herein. 712You are not responsible for enforcing compliance by third parties to 713this License. 714 715 11. If, as a consequence of a court judgment or allegation of patent 716infringement or for any other reason (not limited to patent issues), 717conditions are imposed on you (whether by court order, agreement or 718otherwise) that contradict the conditions of this License, they do not 719excuse you from the conditions of this License. If you cannot 720distribute so as to satisfy simultaneously your obligations under this 721License and any other pertinent obligations, then as a consequence you 722may not distribute the Library at all. For example, if a patent 723license would not permit royalty-free redistribution of the Library by 724all those who receive copies directly or indirectly through you, then 725the only way you could satisfy both it and this License would be to 726refrain entirely from distribution of the Library. 727 728If any portion of this section is held invalid or unenforceable under any 729particular circumstance, the balance of the section is intended to apply, 730and the section as a whole is intended to apply in other circumstances. 731 732It is not the purpose of this section to induce you to infringe any 733patents or other property right claims or to contest validity of any 734such claims; this section has the sole purpose of protecting the 735integrity of the free software distribution system which is 736implemented by public license practices. Many people have made 737generous contributions to the wide range of software distributed 738through that system in reliance on consistent application of that 739system; it is up to the author/donor to decide if he or she is willing 740to distribute software through any other system and a licensee cannot 741impose that choice. 742 743This section is intended to make thoroughly clear what is believed to 744be a consequence of the rest of this License. 745 746 12. If the distribution and/or use of the Library is restricted in 747certain countries either by patents or by copyrighted interfaces, the 748original copyright holder who places the Library under this License may add 749an explicit geographical distribution limitation excluding those countries, 750so that distribution is permitted only in or among countries not thus 751excluded. In such case, this License incorporates the limitation as if 752written in the body of this License. 753 754 13. The Free Software Foundation may publish revised and/or new 755versions of the Library General Public License from time to time. 756Such new versions will be similar in spirit to the present version, 757but may differ in detail to address new problems or concerns. 758 759Each version is given a distinguishing version number. If the Library 760specifies a version number of this License which applies to it and 761"any later version", you have the option of following the terms and 762conditions either of that version or of any later version published by 763the Free Software Foundation. If the Library does not specify a 764license version number, you may choose any version ever published by 765the Free Software Foundation. 766 767 14. If you wish to incorporate parts of the Library into other free 768programs whose distribution conditions are incompatible with these, 769write to the author to ask for permission. For software which is 770copyrighted by the Free Software Foundation, write to the Free 771Software Foundation; we sometimes make exceptions for this. Our 772decision will be guided by the two goals of preserving the free status 773of all derivatives of our free software and of promoting the sharing 774and reuse of software generally. 775 776 NO WARRANTY 777 778 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO 779WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. 780EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR 781OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY 782KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE 783IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 784PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE 785LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME 786THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 787 788 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN 789WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY 790AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU 791FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR 792CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE 793LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING 794RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A 795FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF 796SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 797DAMAGES. 798 799 END OF TERMS AND CONDITIONS 800 801 How to Apply These Terms to Your New Libraries 802 803 If you develop a new library, and you want it to be of the greatest 804possible use to the public, we recommend making it free software that 805everyone can redistribute and change. You can do so by permitting 806redistribution under these terms (or, alternatively, under the terms of the 807ordinary General Public License). 808 809 To apply these terms, attach the following notices to the library. It is 810safest to attach them to the start of each source file to most effectively 811convey the exclusion of warranty; and each file should have at least the 812"copyright" line and a pointer to where the full notice is found. 813 814 <one line to give the library's name and a brief idea of what it does.> 815 Copyright (C) <year> <name of author> 816 817 This library is free software; you can redistribute it and/or 818 modify it under the terms of the GNU Library General Public 819 License as published by the Free Software Foundation; either 820 version 2 of the License, or (at your option) any later version. 821 822 This library is distributed in the hope that it will be useful, 823 but WITHOUT ANY WARRANTY; without even the implied warranty of 824 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 825 Library General Public License for more details. 826 827 You should have received a copy of the GNU Library General Public 828 License along with this library; if not, write to the Free Software 829 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 830 831Also add information on how to contact you by electronic and paper mail. 832 833You should also get your employer (if you work as a programmer) or your 834school, if any, to sign a "copyright disclaimer" for the library, if 835necessary. Here is a sample; alter the names: 836 837 Yoyodyne, Inc., hereby disclaims all copyright interest in the 838 library `Frob' (a library for tweaking knobs) written by James Random Hacker. 839 840 <signature of Ty Coon>, 1 April 1990 841 Ty Coon, President of Vice 842 843That's all there is to it! 844