1PERLGPL(1) Perl Programmers Reference Guide PERLGPL(1)
2
6 perlgpl - the GNU General Public License, version 1
7
9 You can refer to this document in Pod via "L<perlgpl>"
10 Or you can see this document by entering "perldoc perlgpl"
11
13 Perl is free software; you can redistribute it and/or modify it under
14 the terms of either:
15 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 b) the "Artistic License" which comes with this Kit.
21 This is the "GNU General Public License, version 1". It's here so that
23 modules, programs, etc., that want to declare this as their
24 distribution license can link to it.
25 For the Perl Artistic License, see perlartistic.
27
29 GNU GENERAL PUBLIC LICENSE
30 Version 1, February 1989
31 Copyright (C) 1989 Free Software Foundation, Inc.
33 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
34 Everyone is permitted to copy and distribute verbatim copies
35 of this license document, but changing it is not allowed.
36 Preamble
38 The license agreements of most software companies try to keep users
40 at the mercy of those companies. By contrast, our General Public
41 License is intended to guarantee your freedom to share and change free
42 software--to make sure the software is free for all its users. The
43 General Public License applies to the Free Software Foundation's
44 software and to any other program whose authors commit to using it.
45 You can use it for your programs, too.
46 When we speak of free software, we are referring to freedom, not
48 price. Specifically, the General Public License is designed to make
49 sure that you have the freedom to give away or sell copies of free
50 software, that you receive source code or can get it if you want it,
51 that you can change the software or use pieces of it in new free
52 programs; and that you know you can do these things.
53 To protect your rights, we need to make restrictions that forbid
55 anyone to deny you these rights or to ask you to surrender the rights.
56 These restrictions translate to certain responsibilities for you if you
57 distribute copies of the software, or if you modify it.
58 For example, if you distribute copies of a such a program, whether
60 gratis or for a fee, you must give the recipients all the rights that
61 you have. You must make sure that they, too, receive or can get the
62 source code. And you must tell them their rights.
63 We protect your rights with two steps: (1) copyright the software, and
65 (2) offer you this license which gives you legal permission to copy,
66 distribute and/or modify the software.
67 Also, for each author's protection and ours, we want to make certain
69 that everyone understands that there is no warranty for this free
70 software. If the software is modified by someone else and passed on, we
71 want its recipients to know that what they have is not the original, so
72 that any problems introduced by others will not reflect on the original
73 authors' reputations.
74 The precise terms and conditions for copying, distribution and
76 modification follow.
77 GNU GENERAL PUBLIC LICENSE
79 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
80 0. This License Agreement applies to any program or other work which
82 contains a notice placed by the copyright holder saying it may be
83 distributed under the terms of this General Public License. The
84 "Program", below, refers to any such program or work, and a "work based
85 on the Program" means either the Program or any work containing the
86 Program or a portion of it, either verbatim or with modifications. Each
87 licensee is addressed as "you".
88 1. You may copy and distribute verbatim copies of the Program's source
90 code as you receive it, in any medium, provided that you conspicuously and
91 appropriately publish on each copy an appropriate copyright notice and
92 disclaimer of warranty; keep intact all the notices that refer to this
93 General Public License and to the absence of any warranty; and give any
94 other recipients of the Program a copy of this General Public License
95 along with the Program. You may charge a fee for the physical act of
96 transferring a copy.
97 2. You may modify your copy or copies of the Program or any portion of
99 it, and copy and distribute such modifications under the terms of Paragraph
100 1 above, provided that you also do the following:
101 a) cause the modified files to carry prominent notices stating that
103 you changed the files and the date of any change; and
104 b) cause the whole of any work that you distribute or publish, that
106 in whole or in part contains the Program or any part thereof, either
107 with or without modifications, to be licensed at no charge to all
108 third parties under the terms of this General Public License (except
109 that you may choose to grant warranty protection to some or all
110 third parties, at your option).
111 c) If the modified program normally reads commands interactively when
113 run, you must cause it, when started running for such interactive use
114 in the simplest and most usual way, to print or display an
115 announcement including an appropriate copyright notice and a notice
116 that there is no warranty (or else, saying that you provide a
117 warranty) and that users may redistribute the program under these
118 conditions, and telling the user how to view a copy of this General
119 Public License.
120 d) You may charge a fee for the physical act of transferring a
122 copy, and you may at your option offer warranty protection in
123 exchange for a fee.
124 Mere aggregation of another independent work with the Program (or its
126 derivative) on a volume of a storage or distribution medium does not bring
127 the other work under the scope of these terms.
128 3. You may copy and distribute the Program (or a portion or derivative of
130 it, under Paragraph 2) in object code or executable form under the terms of
131 Paragraphs 1 and 2 above provided that you also do one of the following:
132 a) accompany it with the complete corresponding machine-readable
134 source code, which must be distributed under the terms of
135 Paragraphs 1 and 2 above; or,
136 b) accompany it with a written offer, valid for at least three
138 years, to give any third party free (except for a nominal charge
139 for the cost of distribution) a complete machine-readable copy of the
140 corresponding source code, to be distributed under the terms of
141 Paragraphs 1 and 2 above; or,
142 c) accompany it with the information you received as to where the
144 corresponding source code may be obtained. (This alternative is
145 allowed only for noncommercial distribution and only if you
146 received the program in object code or executable form alone.)
147 Source code for a work means the preferred form of the work for making
149 modifications to it. For an executable file, complete source code means
150 all the source code for all modules it contains; but, as a special
151 exception, it need not include source code for modules which are standard
152 libraries that accompany the operating system on which the executable
153 file runs, or for standard header files or definitions files that
154 accompany that operating system.
155 4. You may not copy, modify, sublicense, distribute or transfer the
157 Program except as expressly provided under this General Public License.
158 Any attempt otherwise to copy, modify, sublicense, distribute or transfer
159 the Program is void, and will automatically terminate your rights to use
160 the Program under this License. However, parties who have received
161 copies, or rights to use copies, from you under this General Public
162 License will not have their licenses terminated so long as such parties
163 remain in full compliance.
164 5. By copying, distributing or modifying the Program (or any work based
166 on the Program) you indicate your acceptance of this license to do so,
167 and all its terms and conditions.
168 6. Each time you redistribute the Program (or any work based on the
170 Program), the recipient automatically receives a license from the original
171 licensor to copy, distribute or modify the Program subject to these
172 terms and conditions. You may not impose any further restrictions on the
173 recipients' exercise of the rights granted herein.
174 7. The Free Software Foundation may publish revised and/or new versions
176 of the General Public License from time to time. Such new versions will
177 be similar in spirit to the present version, but may differ in detail to
178 address new problems or concerns.
179 Each version is given a distinguishing version number. If the Program
181 specifies a version number of the license which applies to it and "any
182 later version", you have the option of following the terms and conditions
183 either of that version or of any later version published by the Free
184 Software Foundation. If the Program does not specify a version number of
185 the license, you may choose any version ever published by the Free Software
186 Foundation.
187 8. If you wish to incorporate parts of the Program into other free
189 programs whose distribution conditions are different, write to the author
190 to ask for permission. For software which is copyrighted by the Free
191 Software Foundation, write to the Free Software Foundation; we sometimes
192 make exceptions for this. Our decision will be guided by the two goals
193 of preserving the free status of all derivatives of our free software and
194 of promoting the sharing and reuse of software generally.
195 NO WARRANTY
197 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
199 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
200 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
201 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
202 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
203 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
204 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
205 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
206 REPAIR OR CORRECTION.
207 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
209 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
210 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
211 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
212 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
213 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
214 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
215 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
216 POSSIBILITY OF SUCH DAMAGES.
217 END OF TERMS AND CONDITIONS
219 Appendix: How to Apply These Terms to Your New Programs
221 If you develop a new program, and you want it to be of the greatest
223 possible use to humanity, the best way to achieve this is to make it
224 free software which everyone can redistribute and change under these
225 terms.
226 To do so, attach the following notices to the program. It is safest to
228 attach them to the start of each source file to most effectively convey
229 the exclusion of warranty; and each file should have at least the
230 "copyright" line and a pointer to where the full notice is found.
231 <one line to give the program's name and a brief idea of what it does.>
233 Copyright (C) 19yy <name of author>
234 This program is free software; you can redistribute it and/or modify
236 it under the terms of the GNU General Public License as published by
237 the Free Software Foundation; either version 1, or (at your option)
238 any later version.
239 This program is distributed in the hope that it will be useful,
241 but WITHOUT ANY WARRANTY; without even the implied warranty of
242 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
243 GNU General Public License for more details.
244 You should have received a copy of the GNU General Public License
246 along with this program; if not, write to the Free Software Foundation,
247 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
248 Also add information on how to contact you by electronic and paper mail.
250 If the program is interactive, make it output a short notice like this
252 when it starts in an interactive mode:
253 Gnomovision version 69, Copyright (C) 19xx name of author
255 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
256 This is free software, and you are welcome to redistribute it
257 under certain conditions; type `show c' for details.
258 The hypothetical commands `show w' and `show c' should show the
260 appropriate parts of the General Public License. Of course, the
261 commands you use may be called something other than `show w' and `show
262 c'; they could even be mouse-clicks or menu items--whatever suits your
263 program.
264 You should also get your employer (if you work as a programmer) or your
266 school, if any, to sign a "copyright disclaimer" for the program, if
267 necessary. Here a sample; alter the names:
268 Yoyodyne, Inc., hereby disclaims all copyright interest in the
270 program `Gnomovision' (a program to direct compilers to make passes
271 at assemblers) written by James Hacker.
272 <signature of Ty Coon>, 1 April 1989
274 Ty Coon, President of Vice
275 That's all there is to it!
277perl v5.12.4 2011-06-01 PERLGPL(1)