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