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 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 41 42 Everyone is permitted to copy and distribute verbatim copies 43 of this license document, but changing it is not allowed. 44 45 Preamble 46 47 The license agreements of most software companies try to keep users 48 at the mercy of those companies. By contrast, our General Public 49 License is intended to guarantee your freedom to share and change free 50 software--to make sure the software is free for all its users. The 51 General Public License applies to the Free Software Foundation's 52 software and to any other program whose authors commit to using it. 53 You can use it for your programs, too. 54 55 When we speak of free software, we are referring to freedom, not 56 price. Specifically, the General Public License is designed to make 57 sure that you have the freedom to give away or sell copies of free 58 software, that you receive source code or can get it if you want it, 59 that you can change the software or use pieces of it in new free 60 programs; and that you know you can do these things. 61 62 To protect your rights, we need to make restrictions that forbid 63 anyone to deny you these rights or to ask you to surrender the rights. 64 These restrictions translate to certain responsibilities for you if you 65 distribute copies of the software, or if you modify it. 66 67 For example, if you distribute copies of a such a program, whether 68 gratis or for a fee, you must give the recipients all the rights that 69 you have. You must make sure that they, too, receive or can get the 70 source code. And you must tell them their rights. 71 72 We protect your rights with two steps: (1) copyright the software, 73 and (2) offer you this license which gives you legal permission to 74 copy, distribute and/or modify the software. 75 76 Also, for each author's protection and ours, we want to make certain 77 that everyone understands that there is no warranty for this free 78 software. If the software is modified by someone else and passed on, 79 we want its recipients to know that what they have is not the original, 80 so that any problems introduced by others will not reflect on the 81 original authors' reputations. 82 83 The precise terms and conditions for copying, distribution and 84 modification follow. 85 86 GNU GENERAL PUBLIC LICENSE 87 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 88 89 0. This License Agreement applies to any program or other work which 90 contains a notice placed by the copyright holder saying it may be 91 distributed under the terms of this General Public License. The 92 "Program", below, refers to any such program or work, and a "work based 93 on the Program" means either the Program or any work containing the 94 Program or a portion of it, either verbatim or with modifications. 95 Each licensee is addressed as "you". 96 97 1. You may copy and distribute verbatim copies of the Program's 98 source code as you receive it, in any medium, provided that you 99 conspicuously and appropriately publish on each copy an appropriate 100 copyright notice and disclaimer of warranty; keep intact all the 101 notices that refer to this General Public License and to the absence of 102 any warranty; and give any other recipients of the Program a copy of 103 this General Public License along with the Program. You may charge a 104 fee for the physical act of transferring a copy. 105 106 2. You may modify your copy or copies of the Program or any portion 107 of it, and copy and distribute such modifications under the terms of 108 Paragraph 1 above, provided that you also do the following: 109 110 a) cause the modified files to carry prominent notices stating that 111 you changed the files and the date of any change; and 112 113 b) cause the whole of any work that you distribute or publish, that 114 in whole or in part contains the Program or any part thereof, 115 either with or without modifications, to be licensed at no charge 116 to all third parties under the terms of this General Public License 117 (except that you may choose to grant warranty protection to some or 118 all third parties, at your option). 119 120 c) If the modified program normally reads commands interactively 121 when run, you must cause it, when started running for such 122 interactive use in the simplest and most usual way, to print or 123 display an announcement including an appropriate copyright notice 124 and a notice that there is no warranty (or else, saying that you 125 provide a warranty) and that users may redistribute the program 126 under these conditions, and telling the user how to view a copy of 127 this General Public License. 128 129 d) You may charge a fee for the physical act of transferring a 130 copy, and you may at your option offer warranty protection in 131 exchange for a fee. 132 133 Mere aggregation of another independent work with the Program (or its 134 derivative) on a volume of a storage or distribution medium does not 135 bring the other work under the scope of these terms. 136 137 3. You may copy and distribute the Program (or a portion or 138 derivative of it, under Paragraph 2) in object code or executable form 139 under the terms of Paragraphs 1 and 2 above provided that you also do 140 one of the following: 141 142 a) accompany it with the complete corresponding machine-readable 143 source code, which must be distributed under the terms of 144 Paragraphs 1 and 2 above; or, 145 146 b) accompany it with a written offer, valid for at least three 147 years, to give any third party free (except for a nominal charge 148 for the cost of distribution) a complete machine-readable copy of 149 the corresponding source code, to be distributed under the terms of 150 Paragraphs 1 and 2 above; or, 151 152 c) accompany it with the information you received as to where the 153 corresponding source code may be obtained. (This alternative is 154 allowed only for noncommercial distribution and only if you 155 received the program in object code or executable form alone.) 156 157 Source code for a work means the preferred form of the work for making 158 modifications to it. For an executable file, complete source code 159 means all the source code for all modules it contains; but, as a 160 special exception, it need not include source code for modules which 161 are standard libraries that accompany the operating system on which the 162 executable file runs, or for standard header files or definitions files 163 that accompany that operating system. 164 165 4. You may not copy, modify, sublicense, distribute or transfer the 166 Program except as expressly provided under this General Public License. 167 Any attempt otherwise to copy, modify, sublicense, distribute or 168 transfer the Program is void, and will automatically terminate your 169 rights to use the Program under this License. However, parties who 170 have received copies, or rights to use copies, from you under this 171 General Public License will not have their licenses terminated so long 172 as such parties remain in full compliance. 173 174 5. By copying, distributing or modifying the Program (or any work 175 based on the Program) you indicate your acceptance of this license to 176 do so, and all its terms and conditions. 177 178 6. Each time you redistribute the Program (or any work based on the 179 Program), the recipient automatically receives a license from the 180 original licensor to copy, distribute or modify the Program subject to 181 these terms and conditions. You may not impose any further 182 restrictions on the recipients' exercise of the rights granted herein. 183 184 7. The Free Software Foundation may publish revised and/or new 185 versions of the General Public License from time to time. Such new 186 versions will be similar in spirit to the present version, but may 187 differ in detail to address new problems or concerns. 188 189 Each version is given a distinguishing version number. If the Program 190 specifies a version number of the license which applies to it and "any 191 later version", you have the option of following the terms and 192 conditions either of that version or of any later version published by 193 the Free Software Foundation. If the Program does not specify a 194 version number of the license, you may choose any version ever 195 published by the Free Software Foundation. 196 197 8. If you wish to incorporate parts of the Program into other free 198 programs whose distribution conditions are different, write to the 199 author to ask for permission. For software which is copyrighted by the 200 Free Software Foundation, write to the Free Software Foundation; we 201 sometimes make exceptions for this. Our decision will be guided by the 202 two goals of preserving the free status of all derivatives of our free 203 software and of promoting the sharing and reuse of software generally. 204 205 NO WARRANTY 206 207 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO 208 WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. 209 EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR 210 OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, 211 EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 212 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 213 THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS 214 WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 215 ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 216 217 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN 218 WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY 219 AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU 220 FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR 221 CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE 222 PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING 223 RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A 224 FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF 225 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 226 DAMAGES. 227 228 END OF TERMS AND CONDITIONS 229 230 Appendix: How to Apply These Terms to Your New Programs 231 232 If you develop a new program, and you want it to be of the greatest 233 possible use to humanity, the best way to achieve this is to make it 234 free software which everyone can redistribute and change under these 235 terms. 236 237 To do so, attach the following notices to the program. It is safest 238 to attach them to the start of each source file to most effectively 239 convey the exclusion of warranty; and each file should have at least 240 the "copyright" line and a pointer to where the full notice is found. 241 242 <one line to give the program's name and a brief idea of what it 243 does.> 244 Copyright (C) 19yy <name of author> 245 246 This program is free software; you can redistribute it and/or 247 modify it under the terms of the GNU General Public License as 248 published by the Free Software Foundation; either version 1, or (at 249 your option) any later version. 250 251 This program is distributed in the hope that it will be useful, 252 but WITHOUT ANY WARRANTY; without even the implied warranty of 253 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 254 GNU General Public License for more details. 255 256 You should have received a copy of the GNU General Public License 257 along with this program; if not, write to the Free Software 258 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 259 02110-1301 USA 260 261 262 Also add information on how to contact you by electronic and paper 263 mail. 264 265 If the program is interactive, make it output a short notice like this 266 when it starts in an interactive mode: 267 268 Gnomovision version 69, Copyright (C) 19xx name of author 269 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type 270 'show w'. This is free software, and you are welcome to 271 redistribute it under certain conditions; type 'show c' for 272 details. 273 274 The hypothetical commands 'show w' and 'show c' should show the 275 appropriate parts of the General Public License. Of course, the 276 commands you use may be called something other than 'show w' and 'show 277 c'; they could even be mouse-clicks or menu items--whatever suits your 278 program. 279 280 You should also get your employer (if you work as a programmer) or your 281 school, if any, to sign a "copyright disclaimer" for the program, if 282 necessary. Here a sample; alter the names: 283 284 Yoyodyne, Inc., hereby disclaims all copyright interest in the 285 program 'Gnomovision' (a program to direct compilers to make passes 286 at assemblers) written by James Hacker. 287 288 <signature of Ty Coon>, 1 April 1989 289 Ty Coon, President of Vice 290 291 That's all there is to it! 292 293=cut 294