1 2=head1 NAME 3 4perlgpl - the GNU General Public License, version 1 5 6=head1 SYNOPSIS 7 8 You can refer to this document in Pod via "L<perlgpl>" 9 Or you can see this document by entering "perldoc perlgpl" 10 11=head1 DESCRIPTION 12 13Perl is free software; you can redistribute it and/or modify 14it under the terms of either: 15 16 a) the GNU General Public License as published by the Free 17 Software Foundation; either version 1, or (at your option) any 18 later version, or 19 20 b) the "Artistic License" which comes with this Kit. 21 22This is the B<"GNU General Public License, version 1">. 23It's here so that modules, programs, etc., that want to declare 24this as their distribution license can link to it. 25 26For the Perl Artistic License, see L<perlartistic>. 27 28=cut 29 30# Because the following document's language disallows "changing" 31# it, we haven't gone thru and prettied it up with =item's or 32# anything. It's good enough the way it is. 33 34=head1 GNU GENERAL PUBLIC LICENSE 35 36 GNU GENERAL PUBLIC LICENSE 37 Version 1, February 1989 38 39 Copyright (C) 1989 Free Software Foundation, Inc. 40 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA 41 Everyone is permitted to copy and distribute verbatim copies 42 of this license document, but changing it is not allowed. 43 44 Preamble 45 46 The license agreements of most software companies try to keep users 47 at the mercy of those companies. By contrast, our General Public 48 License is intended to guarantee your freedom to share and change free 49 software--to make sure the software is free for all its users. The 50 General Public License applies to the Free Software Foundation's 51 software and to any other program whose authors commit to using it. 52 You can use it for your programs, too. 53 54 When we speak of free software, we are referring to freedom, not 55 price. Specifically, the General Public License is designed to make 56 sure that you have the freedom to give away or sell copies of free 57 software, that you receive source code or can get it if you want it, 58 that you can change the software or use pieces of it in new free 59 programs; and that you know you can do these things. 60 61 To protect your rights, we need to make restrictions that forbid 62 anyone to deny you these rights or to ask you to surrender the rights. 63 These restrictions translate to certain responsibilities for you if you 64 distribute copies of the software, or if you modify it. 65 66 For example, if you distribute copies of a such a program, whether 67 gratis or for a fee, you must give the recipients all the rights that 68 you have. You must make sure that they, too, receive or can get the 69 source code. And you must tell them their rights. 70 71 We protect your rights with two steps: (1) copyright the software, and 72 (2) offer you this license which gives you legal permission to copy, 73 distribute and/or modify the software. 74 75 Also, for each author's protection and ours, we want to make certain 76 that everyone understands that there is no warranty for this free 77 software. If the software is modified by someone else and passed on, we 78 want its recipients to know that what they have is not the original, so 79 that any problems introduced by others will not reflect on the original 80 authors' reputations. 81 82 The precise terms and conditions for copying, distribution and 83 modification follow. 84 85 GNU GENERAL PUBLIC LICENSE 86 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 87 88 0. This License Agreement applies to any program or other work which 89 contains a notice placed by the copyright holder saying it may be 90 distributed under the terms of this General Public License. The 91 "Program", below, refers to any such program or work, and a "work based 92 on the Program" means either the Program or any work containing the 93 Program or a portion of it, either verbatim or with modifications. Each 94 licensee is addressed as "you". 95 96 1. You may copy and distribute verbatim copies of the Program's source 97 code as you receive it, in any medium, provided that you conspicuously and 98 appropriately publish on each copy an appropriate copyright notice and 99 disclaimer of warranty; keep intact all the notices that refer to this 100 General Public License and to the absence of any warranty; and give any 101 other recipients of the Program a copy of this General Public License 102 along with the Program. You may charge a fee for the physical act of 103 transferring a copy. 104 105 2. You may modify your copy or copies of the Program or any portion of 106 it, and copy and distribute such modifications under the terms of Paragraph 107 1 above, provided that you also do the following: 108 109 a) cause the modified files to carry prominent notices stating that 110 you changed the files and the date of any change; and 111 112 b) cause the whole of any work that you distribute or publish, that 113 in whole or in part contains the Program or any part thereof, either 114 with or without modifications, to be licensed at no charge to all 115 third parties under the terms of this General Public License (except 116 that you may choose to grant warranty protection to some or all 117 third parties, at your option). 118 119 c) If the modified program normally reads commands interactively when 120 run, you must cause it, when started running for such interactive use 121 in the simplest and most usual way, to print or display an 122 announcement including an appropriate copyright notice and a notice 123 that there is no warranty (or else, saying that you provide a 124 warranty) and that users may redistribute the program under these 125 conditions, and telling the user how to view a copy of this General 126 Public License. 127 128 d) You may charge a fee for the physical act of transferring a 129 copy, and you may at your option offer warranty protection in 130 exchange for a fee. 131 132 Mere aggregation of another independent work with the Program (or its 133 derivative) on a volume of a storage or distribution medium does not bring 134 the other work under the scope of these terms. 135 136 3. You may copy and distribute the Program (or a portion or derivative of 137 it, under Paragraph 2) in object code or executable form under the terms of 138 Paragraphs 1 and 2 above provided that you also do one of the following: 139 140 a) accompany it with the complete corresponding machine-readable 141 source code, which must be distributed under the terms of 142 Paragraphs 1 and 2 above; or, 143 144 b) accompany it with a written offer, valid for at least three 145 years, to give any third party free (except for a nominal charge 146 for the cost of distribution) a complete machine-readable copy of the 147 corresponding source code, to be distributed under the terms of 148 Paragraphs 1 and 2 above; or, 149 150 c) accompany it with the information you received as to where the 151 corresponding source code may be obtained. (This alternative is 152 allowed only for noncommercial distribution and only if you 153 received the program in object code or executable form alone.) 154 155 Source code for a work means the preferred form of the work for making 156 modifications to it. For an executable file, complete source code means 157 all the source code for all modules it contains; but, as a special 158 exception, it need not include source code for modules which are standard 159 libraries that accompany the operating system on which the executable 160 file runs, or for standard header files or definitions files that 161 accompany that operating system. 162 163 4. You may not copy, modify, sublicense, distribute or transfer the 164 Program except as expressly provided under this General Public License. 165 Any attempt otherwise to copy, modify, sublicense, distribute or transfer 166 the Program is void, and will automatically terminate your rights to use 167 the Program under this License. However, parties who have received 168 copies, or rights to use copies, from you under this General Public 169 License will not have their licenses terminated so long as such parties 170 remain in full compliance. 171 172 5. By copying, distributing or modifying the Program (or any work based 173 on the Program) you indicate your acceptance of this license to do so, 174 and all its terms and conditions. 175 176 6. Each time you redistribute the Program (or any work based on the 177 Program), the recipient automatically receives a license from the original 178 licensor to copy, distribute or modify the Program subject to these 179 terms and conditions. You may not impose any further restrictions on the 180 recipients' exercise of the rights granted herein. 181 182 7. The Free Software Foundation may publish revised and/or new versions 183 of the General Public License from time to time. Such new versions will 184 be similar in spirit to the present version, but may differ in detail to 185 address new problems or concerns. 186 187 Each version is given a distinguishing version number. If the Program 188 specifies a version number of the license which applies to it and "any 189 later version", you have the option of following the terms and conditions 190 either of that version or of any later version published by the Free 191 Software Foundation. If the Program does not specify a version number of 192 the license, you may choose any version ever published by the Free Software 193 Foundation. 194 195 8. If you wish to incorporate parts of the Program into other free 196 programs whose distribution conditions are different, write to the author 197 to ask for permission. For software which is copyrighted by the Free 198 Software Foundation, write to the Free Software Foundation; we sometimes 199 make exceptions for this. Our decision will be guided by the two goals 200 of preserving the free status of all derivatives of our free software and 201 of promoting the sharing and reuse of software generally. 202 203 NO WARRANTY 204 205 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 206 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 207 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 208 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 209 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 210 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 211 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 212 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 213 REPAIR OR CORRECTION. 214 215 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 216 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 217 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 218 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 219 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 220 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 221 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 222 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 223 POSSIBILITY OF SUCH DAMAGES. 224 225 END OF TERMS AND CONDITIONS 226 227 Appendix: How to Apply These Terms to Your New Programs 228 229 If you develop a new program, and you want it to be of the greatest 230 possible use to humanity, the best way to achieve this is to make it 231 free software which everyone can redistribute and change under these 232 terms. 233 234 To do so, attach the following notices to the program. It is safest to 235 attach them to the start of each source file to most effectively convey 236 the exclusion of warranty; and each file should have at least the 237 "copyright" line and a pointer to where the full notice is found. 238 239 <one line to give the program's name and a brief idea of what it does.> 240 Copyright (C) 19yy <name of author> 241 242 This program is free software; you can redistribute it and/or modify 243 it under the terms of the GNU General Public License as published by 244 the Free Software Foundation; either version 1, or (at your option) 245 any later version. 246 247 This program is distributed in the hope that it will be useful, 248 but WITHOUT ANY WARRANTY; without even the implied warranty of 249 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 250 GNU General Public License for more details. 251 252 You should have received a copy of the GNU General Public License 253 along with this program; if not, write to the Free Software Foundation, 254 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 255 256 Also add information on how to contact you by electronic and paper mail. 257 258 If the program is interactive, make it output a short notice like this 259 when it starts in an interactive mode: 260 261 Gnomovision version 69, Copyright (C) 19xx name of author 262 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 263 This is free software, and you are welcome to redistribute it 264 under certain conditions; type `show c' for details. 265 266 The hypothetical commands `show w' and `show c' should show the 267 appropriate parts of the General Public License. Of course, the 268 commands you use may be called something other than `show w' and `show 269 c'; they could even be mouse-clicks or menu items--whatever suits your 270 program. 271 272 You should also get your employer (if you work as a programmer) or your 273 school, if any, to sign a "copyright disclaimer" for the program, if 274 necessary. Here a sample; alter the names: 275 276 Yoyodyne, Inc., hereby disclaims all copyright interest in the 277 program `Gnomovision' (a program to direct compilers to make passes 278 at assemblers) written by James Hacker. 279 280 <signature of Ty Coon>, 1 April 1989 281 Ty Coon, President of Vice 282 283 That's all there is to it! 284 285=cut 286 287 288