1 GNU GENERAL PUBLIC LICENSE 2 Version 1, February 1989 3 4 Copyright (C) 1989 Free Software Foundation, Inc. 5 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA 6 Everyone is permitted to copy and distribute verbatim copies 7 of this license document, but changing it is not allowed. 8 9 Preamble 10 11 The license agreements of most software companies try to keep users 12at the mercy of those companies. By contrast, our General Public 13License is intended to guarantee your freedom to share and change free 14software--to make sure the software is free for all its users. The 15General Public License applies to the Free Software Foundation's 16software and to any other program whose authors commit to using it. 17You can use it for your programs, too. 18 19 When we speak of free software, we are referring to freedom, not 20price. Specifically, the General Public License is designed to make 21sure that you have the freedom to give away or sell copies of free 22software, that you receive source code or can get it if you want it, 23that you can change the software or use pieces of it in new free 24programs; and that you know you can do these things. 25 26 To protect your rights, we need to make restrictions that forbid 27anyone to deny you these rights or to ask you to surrender the rights. 28These restrictions translate to certain responsibilities for you if you 29distribute copies of the software, or if you modify it. 30 31 For example, if you distribute copies of a such a program, whether 32gratis or for a fee, you must give the recipients all the rights that 33you have. You must make sure that they, too, receive or can get the 34source code. And you must tell them their rights. 35 36 We protect your rights with two steps: (1) copyright the software, and 37(2) offer you this license which gives you legal permission to copy, 38distribute and/or modify the software. 39 40 Also, for each author's protection and ours, we want to make certain 41that everyone understands that there is no warranty for this free 42software. If the software is modified by someone else and passed on, we 43want its recipients to know that what they have is not the original, so 44that any problems introduced by others will not reflect on the original 45authors' reputations. 46 47 The precise terms and conditions for copying, distribution and 48modification follow. 49 50 GNU GENERAL PUBLIC LICENSE 51 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 52 53 0. This License Agreement applies to any program or other work which 54contains a notice placed by the copyright holder saying it may be 55distributed under the terms of this General Public License. The 56"Program", below, refers to any such program or work, and a "work based 57on the Program" means either the Program or any work containing the 58Program or a portion of it, either verbatim or with modifications. Each 59licensee is addressed as "you". 60 61 1. You may copy and distribute verbatim copies of the Program's source 62code as you receive it, in any medium, provided that you conspicuously and 63appropriately publish on each copy an appropriate copyright notice and 64disclaimer of warranty; keep intact all the notices that refer to this 65General Public License and to the absence of any warranty; and give any 66other recipients of the Program a copy of this General Public License 67along with the Program. You may charge a fee for the physical act of 68transferring a copy. 69 70 2. You may modify your copy or copies of the Program or any portion of 71it, and copy and distribute such modifications under the terms of Paragraph 721 above, provided that you also do the following: 73 74 a) cause the modified files to carry prominent notices stating that 75 you changed the files and the date of any change; and 76 77 b) cause the whole of any work that you distribute or publish, that 78 in whole or in part contains the Program or any part thereof, either 79 with or without modifications, to be licensed at no charge to all 80 third parties under the terms of this General Public License (except 81 that you may choose to grant warranty protection to some or all 82 third parties, at your option). 83 84 c) If the modified program normally reads commands interactively when 85 run, you must cause it, when started running for such interactive use 86 in the simplest and most usual way, to print or display an 87 announcement including an appropriate copyright notice and a notice 88 that there is no warranty (or else, saying that you provide a 89 warranty) and that users may redistribute the program under these 90 conditions, and telling the user how to view a copy of this General 91 Public License. 92 93 d) You may charge a fee for the physical act of transferring a 94 copy, and you may at your option offer warranty protection in 95 exchange for a fee. 96 97Mere aggregation of another independent work with the Program (or its 98derivative) on a volume of a storage or distribution medium does not bring 99the other work under the scope of these terms. 100 101 3. You may copy and distribute the Program (or a portion or derivative of 102it, under Paragraph 2) in object code or executable form under the terms of 103Paragraphs 1 and 2 above provided that you also do one of the following: 104 105 a) accompany it with the complete corresponding machine-readable 106 source code, which must be distributed under the terms of 107 Paragraphs 1 and 2 above; or, 108 109 b) accompany it with a written offer, valid for at least three 110 years, to give any third party free (except for a nominal charge 111 for the cost of distribution) a complete machine-readable copy of the 112 corresponding source code, to be distributed under the terms of 113 Paragraphs 1 and 2 above; or, 114 115 c) accompany it with the information you received as to where the 116 corresponding source code may be obtained. (This alternative is 117 allowed only for noncommercial distribution and only if you 118 received the program in object code or executable form alone.) 119 120Source code for a work means the preferred form of the work for making 121modifications to it. For an executable file, complete source code means 122all the source code for all modules it contains; but, as a special 123exception, it need not include source code for modules which are standard 124libraries that accompany the operating system on which the executable 125file runs, or for standard header files or definitions files that 126accompany that operating system. 127 128 4. You may not copy, modify, sublicense, distribute or transfer the 129Program except as expressly provided under this General Public License. 130Any attempt otherwise to copy, modify, sublicense, distribute or transfer 131the Program is void, and will automatically terminate your rights to use 132the Program under this License. However, parties who have received 133copies, or rights to use copies, from you under this General Public 134License will not have their licenses terminated so long as such parties 135remain in full compliance. 136 137 5. By copying, distributing or modifying the Program (or any work based 138on the Program) you indicate your acceptance of this license to do so, 139and all its terms and conditions. 140 141 6. Each time you redistribute the Program (or any work based on the 142Program), the recipient automatically receives a license from the original 143licensor to copy, distribute or modify the Program subject to these 144terms and conditions. You may not impose any further restrictions on the 145recipients' exercise of the rights granted herein. 146 147 7. The Free Software Foundation may publish revised and/or new versions 148of the General Public License from time to time. Such new versions will 149be similar in spirit to the present version, but may differ in detail to 150address new problems or concerns. 151 152Each version is given a distinguishing version number. If the Program 153specifies a version number of the license which applies to it and "any 154later version", you have the option of following the terms and conditions 155either of that version or of any later version published by the Free 156Software Foundation. If the Program does not specify a version number of 157the license, you may choose any version ever published by the Free Software 158Foundation. 159 160 8. If you wish to incorporate parts of the Program into other free 161programs whose distribution conditions are different, write to the author 162to ask for permission. For software which is copyrighted by the Free 163Software Foundation, write to the Free Software Foundation; we sometimes 164make exceptions for this. Our decision will be guided by the two goals 165of preserving the free status of all derivatives of our free software and 166of promoting the sharing and reuse of software generally. 167 168 NO WARRANTY 169 170 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 171FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 172OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 173PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 174OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 175MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 176TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 177PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 178REPAIR OR CORRECTION. 179 180 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 181WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 182REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 183INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 184OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 185TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 186YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 187PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 188POSSIBILITY OF SUCH DAMAGES. 189 190 END OF TERMS AND CONDITIONS 191 192 Appendix: How to Apply These Terms to Your New Programs 193 194 If you develop a new program, and you want it to be of the greatest 195possible use to humanity, the best way to achieve this is to make it 196free software which everyone can redistribute and change under these 197terms. 198 199 To do so, attach the following notices to the program. It is safest to 200attach them to the start of each source file to most effectively convey 201the exclusion of warranty; and each file should have at least the 202"copyright" line and a pointer to where the full notice is found. 203 204 <one line to give the program's name and a brief idea of what it does.> 205 Copyright (C) 19yy <name of author> 206 207 This program is free software; you can redistribute it and/or modify 208 it under the terms of the GNU General Public License as published by 209 the Free Software Foundation; either version 1, or (at your option) 210 any later version. 211 212 This program is distributed in the hope that it will be useful, 213 but WITHOUT ANY WARRANTY; without even the implied warranty of 214 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 215 GNU General Public License for more details. 216 217 You should have received a copy of the GNU General Public License 218 along with this program; if not, write to the Free Software Foundation, 219 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 220 221Also add information on how to contact you by electronic and paper mail. 222 223If the program is interactive, make it output a short notice like this 224when it starts in an interactive mode: 225 226 Gnomovision version 69, Copyright (C) 19xx name of author 227 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 228 This is free software, and you are welcome to redistribute it 229 under certain conditions; type `show c' for details. 230 231The hypothetical commands `show w' and `show c' should show the 232appropriate parts of the General Public License. Of course, the 233commands you use may be called something other than `show w' and `show 234c'; they could even be mouse-clicks or menu items--whatever suits your 235program. 236 237You should also get your employer (if you work as a programmer) or your 238school, if any, to sign a "copyright disclaimer" for the program, if 239necessary. Here a sample; alter the names: 240 241 Yoyodyne, Inc., hereby disclaims all copyright interest in the 242 program `Gnomovision' (a program to direct compilers to make passes 243 at assemblers) written by James Hacker. 244 245 <signature of Ty Coon>, 1 April 1989 246 Ty Coon, President of Vice 247 248That's all there is to it! 249