1PERLGPL(1)             Perl Programmers Reference Guide             PERLGPL(1)
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NAME

6       perlgpl - the GNU General Public License, version 1
7

SYNOPSIS

9        You can refer to this document in Pod via "L<perlgpl>"
10        Or you can see this document by entering "perldoc perlgpl"
11

DESCRIPTION

13       Perl is free software; you can redistribute it and/or modify it under
14       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
22       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
26       For the Perl Artistic License, see perlartistic.
27

GNU GENERAL PUBLIC LICENSE

29                           GNU GENERAL PUBLIC LICENSE
30                            Version 1, February 1989
31
32         Copyright (C) 1989 Free Software Foundation, Inc.
33                       51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
34
35         Everyone is permitted to copy and distribute verbatim copies
36         of this license document, but changing it is not allowed.
37
38                                   Preamble
39
40          The license agreements of most software companies try to keep users
41        at the mercy of those companies.  By contrast, our General Public
42        License is intended to guarantee your freedom to share and change free
43        software--to make sure the software is free for all its users.  The
44        General Public License applies to the Free Software Foundation's
45        software and to any other program whose authors commit to using it.
46        You can use it for your programs, too.
47
48          When we speak of free software, we are referring to freedom, not
49        price.  Specifically, the General Public License is designed to make
50        sure that you have the freedom to give away or sell copies of free
51        software, that you receive source code or can get it if you want it,
52        that you can change the software or use pieces of it in new free
53        programs; and that you know you can do these things.
54
55          To protect your rights, we need to make restrictions that forbid
56        anyone to deny you these rights or to ask you to surrender the rights.
57        These restrictions translate to certain responsibilities for you if you
58        distribute copies of the software, or if you modify it.
59
60          For example, if you distribute copies of a such a program, whether
61        gratis or for a fee, you must give the recipients all the rights that
62        you have.  You must make sure that they, too, receive or can get the
63        source code.  And you must tell them their rights.
64
65          We protect your rights with two steps: (1) copyright the software,
66        and (2) offer you this license which gives you legal permission to
67        copy, distribute and/or modify the software.
68
69          Also, for each author's protection and ours, we want to make certain
70        that everyone understands that there is no warranty for this free
71        software.  If the software is modified by someone else and passed on,
72        we want its recipients to know that what they have is not the original,
73        so that any problems introduced by others will not reflect on the
74        original authors' reputations.
75
76          The precise terms and conditions for copying, distribution and
77        modification follow.
78
79                           GNU GENERAL PUBLIC LICENSE
80           TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
81
82          0. This License Agreement applies to any program or other work which
83        contains a notice placed by the copyright holder saying it may be
84        distributed under the terms of this General Public License.  The
85        "Program", below, refers to any such program or work, and a "work based
86        on the Program" means either the Program or any work containing the
87        Program or a portion of it, either verbatim or with modifications.
88        Each licensee is addressed as "you".
89
90          1. You may copy and distribute verbatim copies of the Program's
91        source code as you receive it, in any medium, provided that you
92        conspicuously and appropriately publish on each copy an appropriate
93        copyright notice and disclaimer of warranty; keep intact all the
94        notices that refer to this General Public License and to the absence of
95        any warranty; and give any other recipients of the Program a copy of
96        this General Public License along with the Program.  You may charge a
97        fee for the physical act of transferring a copy.
98
99          2. You may modify your copy or copies of the Program or any portion
100        of it, and copy and distribute such modifications under the terms of
101        Paragraph 1 above, provided that you also do the following:
102
103            a) cause the modified files to carry prominent notices stating that
104            you changed the files and the date of any change; and
105
106            b) cause the whole of any work that you distribute or publish, that
107            in whole or in part contains the Program or any part thereof,
108            either with or without modifications, to be licensed at no charge
109            to all third parties under the terms of this General Public License
110            (except that you may choose to grant warranty protection to some or
111            all third parties, at your option).
112
113            c) If the modified program normally reads commands interactively
114            when run, you must cause it, when started running for such
115            interactive use in the simplest and most usual way, to print or
116            display an announcement including an appropriate copyright notice
117            and a notice that there is no warranty (or else, saying that you
118            provide a warranty) and that users may redistribute the program
119            under these conditions, and telling the user how to view a copy of
120            this General Public License.
121
122            d) You may charge a fee for the physical act of transferring a
123            copy, and you may at your option offer warranty protection in
124            exchange for a fee.
125
126        Mere aggregation of another independent work with the Program (or its
127        derivative) on a volume of a storage or distribution medium does not
128        bring the other work under the scope of these terms.
129
130          3. You may copy and distribute the Program (or a portion or
131        derivative of it, under Paragraph 2) in object code or executable form
132        under the terms of Paragraphs 1 and 2 above provided that you also do
133        one of the following:
134
135            a) accompany it with the complete corresponding machine-readable
136            source code, which must be distributed under the terms of
137            Paragraphs 1 and 2 above; or,
138
139            b) accompany it with a written offer, valid for at least three
140            years, to give any third party free (except for a nominal charge
141            for the cost of distribution) a complete machine-readable copy of
142            the corresponding source code, to be distributed under the terms of
143            Paragraphs 1 and 2 above; or,
144
145            c) accompany it with the information you received as to where the
146            corresponding source code may be obtained.  (This alternative is
147            allowed only for noncommercial distribution and only if you
148            received the program in object code or executable form alone.)
149
150        Source code for a work means the preferred form of the work for making
151        modifications to it.  For an executable file, complete source code
152        means all the source code for all modules it contains; but, as a
153        special exception, it need not include source code for modules which
154        are standard libraries that accompany the operating system on which the
155        executable file runs, or for standard header files or definitions files
156        that accompany that operating system.
157
158          4. You may not copy, modify, sublicense, distribute or transfer the
159        Program except as expressly provided under this General Public License.
160        Any attempt otherwise to copy, modify, sublicense, distribute or
161        transfer the Program is void, and will automatically terminate your
162        rights to use the Program under this License.  However, parties who
163        have received copies, or rights to use copies, from you under this
164        General Public License will not have their licenses terminated so long
165        as such parties remain in full compliance.
166
167          5. By copying, distributing or modifying the Program (or any work
168        based on the Program) you indicate your acceptance of this license to
169        do so, and all its terms and conditions.
170
171          6. Each time you redistribute the Program (or any work based on the
172        Program), the recipient automatically receives a license from the
173        original licensor to copy, distribute or modify the Program subject to
174        these terms and conditions.  You may not impose any further
175        restrictions on the recipients' exercise of the rights granted herein.
176
177          7. The Free Software Foundation may publish revised and/or new
178        versions of the General Public License from time to time.  Such new
179        versions will be similar in spirit to the present version, but may
180        differ in detail to address new problems or concerns.
181
182        Each version is given a distinguishing version number.  If the Program
183        specifies a version number of the license which applies to it and "any
184        later version", you have the option of following the terms and
185        conditions either of that version or of any later version published by
186        the Free Software Foundation.  If the Program does not specify a
187        version number of the license, you may choose any version ever
188        published by the Free Software Foundation.
189
190          8. If you wish to incorporate parts of the Program into other free
191        programs whose distribution conditions are different, write to the
192        author to ask for permission.  For software which is copyrighted by the
193        Free Software Foundation, write to the Free Software Foundation; we
194        sometimes make exceptions for this.  Our decision will be guided by the
195        two goals of preserving the free status of all derivatives of our free
196        software and of promoting the sharing and reuse of software generally.
197
198                                   NO WARRANTY
199
200          9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
201        WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
202        EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
203        OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
204        EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
205        WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
206        THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS
207        WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
208        ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
209
210          10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
211        WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
212        AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU
213        FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
214        CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
215        PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
216        RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
217        FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
218        SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
219        DAMAGES.
220
221                            END OF TERMS AND CONDITIONS
222
223               Appendix: How to Apply These Terms to Your New Programs
224
225          If you develop a new program, and you want it to be of the greatest
226        possible use to humanity, the best way to achieve this is to make it
227        free software which everyone can redistribute and change under these
228        terms.
229
230          To do so, attach the following notices to the program.  It is safest
231        to attach them to the start of each source file to most effectively
232        convey the exclusion of warranty; and each file should have at least
233        the "copyright" line and a pointer to where the full notice is found.
234
235            <one line to give the program's name and a brief idea of what it
236            does.>
237            Copyright (C) 19yy  <name of author>
238
239            This program is free software; you can redistribute it and/or
240            modify it under the terms of the GNU General Public License as
241            published by the Free Software Foundation; either version 1, or (at
242            your option) any later version.
243
244            This program is distributed in the hope that it will be useful,
245            but WITHOUT ANY WARRANTY; without even the implied warranty of
246            MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
247            GNU General Public License for more details.
248
249            You should have received a copy of the GNU General Public License
250            along with this program; if not, write to the Free Software
251            Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
252            02110-1301 USA
253
254
255        Also add information on how to contact you by electronic and paper
256        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
263            'show w'.  This is free software, and you are welcome to
264            redistribute it under certain conditions; type 'show c' for
265            details.
266
267        The hypothetical commands 'show w' and 'show c' should show the
268        appropriate parts of the General Public License.  Of course, the
269        commands you use may be called something other than 'show w' and 'show
270        c'; they could even be mouse-clicks or menu items--whatever suits your
271        program.
272
273        You should also get your employer (if you work as a programmer) or your
274        school, if any, to sign a "copyright disclaimer" for the program, if
275        necessary.  Here a sample; alter the names:
276
277          Yoyodyne, Inc., hereby disclaims all copyright interest in the
278          program 'Gnomovision' (a program to direct compilers to make passes
279          at assemblers) written by James Hacker.
280
281          <signature of Ty Coon>, 1 April 1989
282          Ty Coon, President of Vice
283
284        That's all there is to it!
285
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288perl v5.32.1                      2021-05-31                        PERLGPL(1)
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