1228068Sbapt@c This GPL is meant to be included from other files. 2228068Sbapt@c To format a standalone GPL, use license.texi. 3228068Sbapt 4228068Sbapt@center Version 2, June 1991 5228068Sbapt 6228068Sbapt@display 7228068SbaptCopyright @copyright{} 1989, 1991 Free Software Foundation, Inc., 8228068Sbapt59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 9228068Sbapt 10228068SbaptEveryone is permitted to copy and distribute verbatim copies 11228068Sbaptof this license document, but changing it is not allowed. 12228068Sbapt@end display 13228068Sbapt 14228068Sbapt@unnumberedsec Preamble 15228068Sbapt 16228068Sbapt The licenses for most software are designed to take away your 17228068Sbaptfreedom to share and change it. By contrast, the GNU General Public 18228068SbaptLicense is intended to guarantee your freedom to share and change free 19228068Sbaptsoftware---to make sure the software is free for all its users. This 20228068SbaptGeneral Public License applies to most of the Free Software 21228068SbaptFoundation's software and to any other program whose authors commit to 22228068Sbaptusing it. (Some other Free Software Foundation software is covered by 23228068Sbaptthe GNU Library General Public License instead.) You can apply it to 24228068Sbaptyour programs, too. 25228068Sbapt 26228068Sbapt When we speak of free software, we are referring to freedom, not 27228068Sbaptprice. Our General Public Licenses are designed to make sure that you 28228068Sbapthave the freedom to distribute copies of free software (and charge for 29228068Sbaptthis service if you wish), that you receive source code or can get it 30228068Sbaptif you want it, that you can change the software or use pieces of it 31228068Sbaptin new free programs; and that you know you can do these things. 32228068Sbapt 33228068Sbapt To protect your rights, we need to make restrictions that forbid 34228068Sbaptanyone to deny you these rights or to ask you to surrender the rights. 35228068SbaptThese restrictions translate to certain responsibilities for you if you 36228068Sbaptdistribute copies of the software, or if you modify it. 37228068Sbapt 38228068Sbapt For example, if you distribute copies of such a program, whether 39228068Sbaptgratis or for a fee, you must give the recipients all the rights that 40228068Sbaptyou have. You must make sure that they, too, receive or can get the 41228068Sbaptsource code. And you must show them these terms so they know their 42228068Sbaptrights. 43228068Sbapt 44228068Sbapt We protect your rights with two steps: (1) copyright the software, and 45228068Sbapt(2) offer you this license which gives you legal permission to copy, 46228068Sbaptdistribute and/or modify the software. 47228068Sbapt 48228068Sbapt Also, for each author's protection and ours, we want to make certain 49228068Sbaptthat everyone understands that there is no warranty for this free 50228068Sbaptsoftware. If the software is modified by someone else and passed on, we 51228068Sbaptwant its recipients to know that what they have is not the original, so 52228068Sbaptthat any problems introduced by others will not reflect on the original 53228068Sbaptauthors' reputations. 54228068Sbapt 55228068Sbapt Finally, any free program is threatened constantly by software 56228068Sbaptpatents. We wish to avoid the danger that redistributors of a free 57228068Sbaptprogram will individually obtain patent licenses, in effect making the 58228068Sbaptprogram proprietary. To prevent this, we have made it clear that any 59228068Sbaptpatent must be licensed for everyone's free use or not licensed at all. 60228068Sbapt 61228068Sbapt The precise terms and conditions for copying, distribution and 62228068Sbaptmodification follow. 63228068Sbapt 64228068Sbapt@iftex 65228068Sbapt@unnumberedsec TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 66228068Sbapt@end iftex 67228068Sbapt@ifinfo 68228068Sbapt@center TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 69228068Sbapt@end ifinfo 70228068Sbapt 71228068Sbapt@enumerate 0 72228068Sbapt@item 73228068SbaptThis License applies to any program or other work which contains 74228068Sbapta notice placed by the copyright holder saying it may be distributed 75228068Sbaptunder the terms of this General Public License. The ``Program'', below, 76228068Sbaptrefers to any such program or work, and a ``work based on the Program'' 77228068Sbaptmeans either the Program or any derivative work under copyright law: 78228068Sbaptthat is to say, a work containing the Program or a portion of it, 79228068Sbapteither verbatim or with modifications and/or translated into another 80228068Sbaptlanguage. (Hereinafter, translation is included without limitation in 81228068Sbaptthe term ``modification''.) Each licensee is addressed as ``you''. 82228068Sbapt 83228068SbaptActivities other than copying, distribution and modification are not 84228068Sbaptcovered by this License; they are outside its scope. The act of 85228068Sbaptrunning the Program is not restricted, and the output from the Program 86228068Sbaptis covered only if its contents constitute a work based on the 87228068SbaptProgram (independent of having been made by running the Program). 88228068SbaptWhether that is true depends on what the Program does. 89228068Sbapt 90228068Sbapt@item 91228068SbaptYou may copy and distribute verbatim copies of the Program's 92228068Sbaptsource code as you receive it, in any medium, provided that you 93228068Sbaptconspicuously and appropriately publish on each copy an appropriate 94228068Sbaptcopyright notice and disclaimer of warranty; keep intact all the 95228068Sbaptnotices that refer to this License and to the absence of any warranty; 96228068Sbaptand give any other recipients of the Program a copy of this License 97228068Sbaptalong with the Program. 98228068Sbapt 99228068SbaptYou may charge a fee for the physical act of transferring a copy, and 100228068Sbaptyou may at your option offer warranty protection in exchange for a fee. 101228068Sbapt 102228068Sbapt@item 103228068SbaptYou may modify your copy or copies of the Program or any portion 104228068Sbaptof it, thus forming a work based on the Program, and copy and 105228068Sbaptdistribute such modifications or work under the terms of Section 1 106228068Sbaptabove, provided that you also meet all of these conditions: 107228068Sbapt 108228068Sbapt@enumerate a 109228068Sbapt@item 110228068SbaptYou must cause the modified files to carry prominent notices 111228068Sbaptstating that you changed the files and the date of any change. 112228068Sbapt 113228068Sbapt@item 114228068SbaptYou must cause any work that you distribute or publish, that in 115228068Sbaptwhole or in part contains or is derived from the Program or any 116228068Sbaptpart thereof, to be licensed as a whole at no charge to all third 117228068Sbaptparties under the terms of this License. 118228068Sbapt 119228068Sbapt@item 120228068SbaptIf the modified program normally reads commands interactively 121228068Sbaptwhen run, you must cause it, when started running for such 122228068Sbaptinteractive use in the most ordinary way, to print or display an 123228068Sbaptannouncement including an appropriate copyright notice and a 124228068Sbaptnotice that there is no warranty (or else, saying that you provide 125228068Sbapta warranty) and that users may redistribute the program under 126228068Sbaptthese conditions, and telling the user how to view a copy of this 127228068SbaptLicense. (Exception: if the Program itself is interactive but 128228068Sbaptdoes not normally print such an announcement, your work based on 129228068Sbaptthe Program is not required to print an announcement.) 130228068Sbapt@end enumerate 131228068Sbapt 132228068SbaptThese requirements apply to the modified work as a whole. If 133228068Sbaptidentifiable sections of that work are not derived from the Program, 134228068Sbaptand can be reasonably considered independent and separate works in 135228068Sbaptthemselves, then this License, and its terms, do not apply to those 136228068Sbaptsections when you distribute them as separate works. But when you 137228068Sbaptdistribute the same sections as part of a whole which is a work based 138228068Sbapton the Program, the distribution of the whole must be on the terms of 139228068Sbaptthis License, whose permissions for other licensees extend to the 140228068Sbaptentire whole, and thus to each and every part regardless of who wrote it. 141228068Sbapt 142228068SbaptThus, it is not the intent of this section to claim rights or contest 143228068Sbaptyour rights to work written entirely by you; rather, the intent is to 144228068Sbaptexercise the right to control the distribution of derivative or 145228068Sbaptcollective works based on the Program. 146228068Sbapt 147228068SbaptIn addition, mere aggregation of another work not based on the Program 148228068Sbaptwith the Program (or with a work based on the Program) on a volume of 149228068Sbapta storage or distribution medium does not bring the other work under 150228068Sbaptthe scope of this License. 151228068Sbapt 152228068Sbapt@item 153228068SbaptYou may copy and distribute the Program (or a work based on it, 154228068Sbaptunder Section 2) in object code or executable form under the terms of 155228068SbaptSections 1 and 2 above provided that you also do one of the following: 156228068Sbapt 157228068Sbapt@enumerate a 158228068Sbapt@item 159228068SbaptAccompany it with the complete corresponding machine-readable 160228068Sbaptsource code, which must be distributed under the terms of Sections 161228068Sbapt1 and 2 above on a medium customarily used for software interchange; or, 162228068Sbapt 163228068Sbapt@item 164228068SbaptAccompany it with a written offer, valid for at least three 165228068Sbaptyears, to give any third party, for a charge no more than your 166228068Sbaptcost of physically performing source distribution, a complete 167228068Sbaptmachine-readable copy of the corresponding source code, to be 168228068Sbaptdistributed under the terms of Sections 1 and 2 above on a medium 169228068Sbaptcustomarily used for software interchange; or, 170228068Sbapt 171228068Sbapt@item 172228068SbaptAccompany it with the information you received as to the offer 173228068Sbaptto distribute corresponding source code. (This alternative is 174228068Sbaptallowed only for noncommercial distribution and only if you 175228068Sbaptreceived the program in object code or executable form with such 176228068Sbaptan offer, in accord with Subsection b above.) 177228068Sbapt@end enumerate 178228068Sbapt 179228068SbaptThe source code for a work means the preferred form of the work for 180228068Sbaptmaking modifications to it. For an executable work, complete source 181228068Sbaptcode means all the source code for all modules it contains, plus any 182228068Sbaptassociated interface definition files, plus the scripts used to 183228068Sbaptcontrol compilation and installation of the executable. However, as a 184228068Sbaptspecial exception, the source code distributed need not include 185228068Sbaptanything that is normally distributed (in either source or binary 186228068Sbaptform) with the major components (compiler, kernel, and so on) of the 187228068Sbaptoperating system on which the executable runs, unless that component 188228068Sbaptitself accompanies the executable. 189228068Sbapt 190228068SbaptIf distribution of executable or object code is made by offering 191228068Sbaptaccess to copy from a designated place, then offering equivalent 192228068Sbaptaccess to copy the source code from the same place counts as 193228068Sbaptdistribution of the source code, even though third parties are not 194228068Sbaptcompelled to copy the source along with the object code. 195228068Sbapt 196228068Sbapt@item 197228068SbaptYou may not copy, modify, sublicense, or distribute the Program 198228068Sbaptexcept as expressly provided under this License. Any attempt 199228068Sbaptotherwise to copy, modify, sublicense or distribute the Program is 200228068Sbaptvoid, and will automatically terminate your rights under this License. 201228068SbaptHowever, parties who have received copies, or rights, from you under 202228068Sbaptthis License will not have their licenses terminated so long as such 203228068Sbaptparties remain in full compliance. 204228068Sbapt 205228068Sbapt@item 206228068SbaptYou are not required to accept this License, since you have not 207228068Sbaptsigned it. However, nothing else grants you permission to modify or 208228068Sbaptdistribute the Program or its derivative works. These actions are 209228068Sbaptprohibited by law if you do not accept this License. Therefore, by 210228068Sbaptmodifying or distributing the Program (or any work based on the 211228068SbaptProgram), you indicate your acceptance of this License to do so, and 212228068Sbaptall its terms and conditions for copying, distributing or modifying 213228068Sbaptthe Program or works based on it. 214228068Sbapt 215228068Sbapt@item 216228068SbaptEach time you redistribute the Program (or any work based on the 217228068SbaptProgram), the recipient automatically receives a license from the 218228068Sbaptoriginal licensor to copy, distribute or modify the Program subject to 219228068Sbaptthese terms and conditions. You may not impose any further 220228068Sbaptrestrictions on the recipients' exercise of the rights granted herein. 221228068SbaptYou are not responsible for enforcing compliance by third parties to 222228068Sbaptthis License. 223228068Sbapt 224228068Sbapt@item 225228068SbaptIf, as a consequence of a court judgment or allegation of patent 226228068Sbaptinfringement or for any other reason (not limited to patent issues), 227228068Sbaptconditions are imposed on you (whether by court order, agreement or 228228068Sbaptotherwise) that contradict the conditions of this License, they do not 229228068Sbaptexcuse you from the conditions of this License. If you cannot 230228068Sbaptdistribute so as to satisfy simultaneously your obligations under this 231228068SbaptLicense and any other pertinent obligations, then as a consequence you 232228068Sbaptmay not distribute the Program at all. For example, if a patent 233228068Sbaptlicense would not permit royalty-free redistribution of the Program by 234228068Sbaptall those who receive copies directly or indirectly through you, then 235228068Sbaptthe only way you could satisfy both it and this License would be to 236228068Sbaptrefrain entirely from distribution of the Program. 237228068Sbapt 238228068SbaptIf any portion of this section is held invalid or unenforceable under 239228068Sbaptany particular circumstance, the balance of the section is intended to 240228068Sbaptapply and the section as a whole is intended to apply in other 241228068Sbaptcircumstances. 242228068Sbapt 243228068SbaptIt is not the purpose of this section to induce you to infringe any 244228068Sbaptpatents or other property right claims or to contest validity of any 245228068Sbaptsuch claims; this section has the sole purpose of protecting the 246228068Sbaptintegrity of the free software distribution system, which is 247228068Sbaptimplemented by public license practices. Many people have made 248228068Sbaptgenerous contributions to the wide range of software distributed 249228068Sbaptthrough that system in reliance on consistent application of that 250228068Sbaptsystem; it is up to the author/donor to decide if he or she is willing 251228068Sbaptto distribute software through any other system and a licensee cannot 252228068Sbaptimpose that choice. 253228068Sbapt 254228068SbaptThis section is intended to make thoroughly clear what is believed to 255228068Sbaptbe a consequence of the rest of this License. 256228068Sbapt 257228068Sbapt@item 258228068SbaptIf the distribution and/or use of the Program is restricted in 259228068Sbaptcertain countries either by patents or by copyrighted interfaces, the 260228068Sbaptoriginal copyright holder who places the Program under this License 261228068Sbaptmay add an explicit geographical distribution limitation excluding 262228068Sbaptthose countries, so that distribution is permitted only in or among 263228068Sbaptcountries not thus excluded. In such case, this License incorporates 264228068Sbaptthe limitation as if written in the body of this License. 265228068Sbapt 266228068Sbapt@item 267228068SbaptThe Free Software Foundation may publish revised and/or new versions 268228068Sbaptof the General Public License from time to time. Such new versions will 269228068Sbaptbe similar in spirit to the present version, but may differ in detail to 270228068Sbaptaddress new problems or concerns. 271228068Sbapt 272228068SbaptEach version is given a distinguishing version number. If the Program 273228068Sbaptspecifies a version number of this License which applies to it and ``any 274228068Sbaptlater version'', you have the option of following the terms and conditions 275228068Sbapteither of that version or of any later version published by the Free 276228068SbaptSoftware Foundation. If the Program does not specify a version number of 277228068Sbaptthis License, you may choose any version ever published by the Free Software 278228068SbaptFoundation. 279228068Sbapt 280228068Sbapt@item 281228068SbaptIf you wish to incorporate parts of the Program into other free 282228068Sbaptprograms whose distribution conditions are different, write to the author 283228068Sbaptto ask for permission. For software which is copyrighted by the Free 284228068SbaptSoftware Foundation, write to the Free Software Foundation; we sometimes 285228068Sbaptmake exceptions for this. Our decision will be guided by the two goals 286228068Sbaptof preserving the free status of all derivatives of our free software and 287228068Sbaptof promoting the sharing and reuse of software generally. 288228068Sbapt 289228068Sbapt@iftex 290228068Sbapt@vskip -@baselineskip 291228068Sbapt@vskip -@baselineskip 292228068Sbapt@heading NO WARRANTY 293228068Sbapt@end iftex 294228068Sbapt@ifinfo 295228068Sbapt@center NO WARRANTY 296228068Sbapt@end ifinfo 297228068Sbapt 298228068Sbapt@item 299228068SbaptBECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 300228068SbaptFOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 301228068SbaptOTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 302228068SbaptPROVIDE THE PROGRAM ``AS IS'' WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 303228068SbaptOR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 304228068SbaptMERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 305228068SbaptTO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 306228068SbaptPROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 307228068SbaptREPAIR OR CORRECTION. 308228068Sbapt 309228068Sbapt@item 310228068SbaptIN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 311228068SbaptWILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 312228068SbaptREDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 313228068SbaptINCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 314228068SbaptOUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 315228068SbaptTO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 316228068SbaptYOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 317228068SbaptPROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 318228068SbaptPOSSIBILITY OF SUCH DAMAGES. 319228068Sbapt@end enumerate 320228068Sbapt 321228068Sbapt@iftex 322228068Sbapt@heading END OF TERMS AND CONDITIONS 323228068Sbapt@end iftex 324228068Sbapt@ifinfo 325228068Sbapt@center END OF TERMS AND CONDITIONS 326228068Sbapt@end ifinfo 327228068Sbapt 328228068Sbapt@page 329228068Sbapt@unnumberedsec How to Apply These Terms to Your New Programs 330228068Sbapt 331228068Sbapt If you develop a new program, and you want it to be of the greatest 332228068Sbaptpossible use to the public, the best way to achieve this is to make it 333228068Sbaptfree software which everyone can redistribute and change under these terms. 334228068Sbapt 335228068Sbapt To do so, attach the following notices to the program. It is safest 336228068Sbaptto attach them to the start of each source file to most effectively 337228068Sbaptconvey the exclusion of warranty; and each file should have at least 338228068Sbaptthe ``copyright'' line and a pointer to where the full notice is found. 339228068Sbapt 340228068Sbapt@smallexample 341228068Sbapt@var{one line to give the program's name and an idea of what it does.} 342228068SbaptCopyright (C) @var{year} @var{name of author} 343228068Sbapt 344228068SbaptThis program is free software; you can redistribute it and/or 345228068Sbaptmodify it under the terms of the GNU General Public License 346228068Sbaptas published by the Free Software Foundation; either version 2 347228068Sbaptof the License, or (at your option) any later version. 348228068Sbapt 349228068SbaptThis program is distributed in the hope that it will be useful, 350228068Sbaptbut WITHOUT ANY WARRANTY; without even the implied warranty of 351228068SbaptMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 352228068SbaptGNU General Public License for more details. 353228068Sbapt 354228068SbaptYou should have received a copy of the GNU General Public License 355228068Sbaptalong with this program; if not, write to the Free Software 356228068SbaptFoundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 357228068Sbapt@end smallexample 358228068Sbapt 359228068SbaptAlso add information on how to contact you by electronic and paper mail. 360228068Sbapt 361228068SbaptIf the program is interactive, make it output a short notice like this 362228068Sbaptwhen it starts in an interactive mode: 363228068Sbapt 364228068Sbapt@smallexample 365228068SbaptGnomovision version 69, Copyright (C) @var{year} @var{name of author} 366228068SbaptGnomovision comes with ABSOLUTELY NO WARRANTY; for details 367228068Sbapttype `show w'. This is free software, and you are welcome 368228068Sbaptto redistribute it under certain conditions; type `show c' 369228068Sbaptfor details. 370228068Sbapt@end smallexample 371228068Sbapt 372228068SbaptThe hypothetical commands @samp{show w} and @samp{show c} should show 373228068Sbaptthe appropriate parts of the General Public License. Of course, the 374228068Sbaptcommands you use may be called something other than @samp{show w} and 375228068Sbapt@samp{show c}; they could even be mouse-clicks or menu items---whatever 376228068Sbaptsuits your program. 377228068Sbapt 378228068SbaptYou should also get your employer (if you work as a programmer) or your 379228068Sbaptschool, if any, to sign a ``copyright disclaimer'' for the program, if 380228068Sbaptnecessary. Here is a sample; alter the names: 381228068Sbapt 382228068Sbapt@example 383228068Sbapt@group 384228068SbaptYoyodyne, Inc., hereby disclaims all copyright 385228068Sbaptinterest in the program `Gnomovision' 386228068Sbapt(which makes passes at compilers) written 387228068Sbaptby James Hacker. 388228068Sbapt 389228068Sbapt@var{signature of Ty Coon}, 1 April 1989 390228068SbaptTy Coon, President of Vice 391228068Sbapt@end group 392228068Sbapt@end example 393228068Sbapt 394228068SbaptThis General Public License does not permit incorporating your program into 395228068Sbaptproprietary programs. If your program is a subroutine library, you may 396228068Sbaptconsider it more useful to permit linking proprietary applications with the 397228068Sbaptlibrary. If this is what you want to do, use the GNU Library General 398228068SbaptPublic License instead of this License. 399