- NAME
- SYNOPSIS
- DESCRIPTION
- GNU GENERAL PUBLIC LICENSE

# NAME

perlgpl - the GNU General Public License, version 1

# SYNOPSIS

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

# DESCRIPTION

Perl is free software; you can redistribute it and/or modify it under the terms of either:

            a) the GNU General Public License as published by the Free
            Software Foundation; either version 1, or (at your option) any
            later version, or

            b) the "Artistic License" which comes with this Kit.

This is the "GNU General Public License, version 1". It's here so that modules, programs, etc., that want to declare this as their distribution license can link to it.

For the Perl Artistic License, see perlartistic.

# GNU GENERAL PUBLIC LICENSE

                        GNU GENERAL PUBLIC LICENSE
                         Version 1, February 1989

      Copyright (C) 1989 Free Software Foundation, Inc.
                    51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

      Everyone is permitted to copy and distribute verbatim copies
      of this license document, but changing it is not allowed.

                                Preamble

       The license agreements of most software companies try to keep users
     at the mercy of those companies.  By contrast, our General Public
     License is intended to guarantee your freedom to share and change free
     software--to make sure the software is free for all its users.  The
     General Public License applies to the Free Software Foundation's
     software and to any other program whose authors commit to using it.
     You can use it for your programs, too.

       When we speak of free software, we are referring to freedom, not
     price.  Specifically, the General Public License is designed to make
     sure that you have the freedom to give away or sell copies of free
     software, that you receive source code or can get it if you want it,
     that you can change the software or use pieces of it in new free
     programs; and that you know you can do these things.

       To protect your rights, we need to make restrictions that forbid
     anyone to deny you these rights or to ask you to surrender the rights.
     These restrictions translate to certain responsibilities for you if you
     distribute copies of the software, or if you modify it.

       For example, if you distribute copies of a such a program, whether
     gratis or for a fee, you must give the recipients all the rights that
     you have.  You must make sure that they, too, receive or can get the
     source code.  And you must tell them their rights.

       We protect your rights with two steps: (1) copyright the software,
     and (2) offer you this license which gives you legal permission to
     copy, distribute and/or modify the software.

       Also, for each author's protection and ours, we want to make certain
     that everyone understands that there is no warranty for this free
     software.  If the software is modified by someone else and passed on,
     we want its recipients to know that what they have is not the original,
     so that any problems introduced by others will not reflect on the
     original authors' reputations.

       The precise terms and conditions for copying, distribution and
     modification follow.

                        GNU GENERAL PUBLIC LICENSE
        TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

       0. This License Agreement applies to any program or other work which
     contains a notice placed by the copyright holder saying it may be
     distributed under the terms of this General Public License.  The
     "Program", below, refers to any such program or work, and a "work based
     on the Program" means either the Program or any work containing the
     Program or a portion of it, either verbatim or with modifications.
     Each licensee is addressed as "you".

       1. You may copy and distribute verbatim copies of the Program's
     source code as you receive it, in any medium, provided that you
     conspicuously and appropriately publish on each copy an appropriate
     copyright notice and disclaimer of warranty; keep intact all the
     notices that refer to this General Public License and to the absence of
     any warranty; and give any other recipients of the Program a copy of
     this General Public License along with the Program.  You may charge a
     fee for the physical act of transferring a copy.

       2. You may modify your copy or copies of the Program or any portion
     of it, and copy and distribute such modifications under the terms of
     Paragraph 1 above, provided that you also do the following:

         a) cause the modified files to carry prominent notices stating that
         you changed the files and the date of any change; and

         b) cause the whole of any work that you distribute or publish, that
         in whole or in part contains the Program or any part thereof,
         either with or without modifications, to be licensed at no charge
         to all third parties under the terms of this General Public License
         (except that you may choose to grant warranty protection to some or
         all third parties, at your option).

         c) If the modified program normally reads commands interactively
         when run, you must cause it, when started running for such
         interactive use in the simplest and most usual way, to print or
         display an announcement including an appropriate copyright notice
         and a notice that there is no warranty (or else, saying that you
         provide a warranty) and that users may redistribute the program
         under these conditions, and telling the user how to view a copy of
         this General Public License.

         d) You may charge a fee for the physical act of transferring a
         copy, and you may at your option offer warranty protection in
         exchange for a fee.

     Mere aggregation of another independent work with the Program (or its
     derivative) on a volume of a storage or distribution medium does not
     bring the other work under the scope of these terms.

       3. You may copy and distribute the Program (or a portion or
     derivative of it, under Paragraph 2) in object code or executable form
     under the terms of Paragraphs 1 and 2 above provided that you also do
     one of the following:

         a) accompany it with the complete corresponding machine-readable
         source code, which must be distributed under the terms of
         Paragraphs 1 and 2 above; or,

         b) accompany it with a written offer, valid for at least three
         years, to give any third party free (except for a nominal charge
         for the cost of distribution) a complete machine-readable copy of
         the corresponding source code, to be distributed under the terms of
         Paragraphs 1 and 2 above; or,

         c) accompany it with the information you received as to where the
         corresponding source code may be obtained.  (This alternative is
         allowed only for noncommercial distribution and only if you
         received the program in object code or executable form alone.)

     Source code for a work means the preferred form of the work for making
     modifications to it.  For an executable file, complete source code
     means all the source code for all modules it contains; but, as a
     special exception, it need not include source code for modules which
     are standard libraries that accompany the operating system on which the
     executable file runs, or for standard header files or definitions files
     that accompany that operating system.

       4. You may not copy, modify, sublicense, distribute or transfer the
     Program except as expressly provided under this General Public License.
     Any attempt otherwise to copy, modify, sublicense, distribute or
     transfer the Program is void, and will automatically terminate your
     rights to use the Program under this License.  However, parties who
     have received copies, or rights to use copies, from you under this
     General Public License will not have their licenses terminated so long
     as such parties remain in full compliance.

       5. By copying, distributing or modifying the Program (or any work
     based on the Program) you indicate your acceptance of this license to
     do so, and all its terms and conditions.

       6. Each time you redistribute the Program (or any work based on the
     Program), the recipient automatically receives a license from the
     original licensor to copy, distribute or modify the Program subject to
     these terms and conditions.  You may not impose any further
     restrictions on the recipients' exercise of the rights granted herein.

       7. The Free Software Foundation may publish revised and/or new
     versions of the General Public License from time to time.  Such new
     versions will be similar in spirit to the present version, but may
     differ in detail to address new problems or concerns.

     Each version is given a distinguishing version number.  If the Program
     specifies a version number of the license which applies to it and "any
     later version", you have the option of following the terms and
     conditions either of that version or of any later version published by
     the Free Software Foundation.  If the Program does not specify a
     version number of the license, you may choose any version ever
     published by the Free Software Foundation.

       8. If you wish to incorporate parts of the Program into other free
     programs whose distribution conditions are different, write to the
     author to ask for permission.  For software which is copyrighted by the
     Free Software Foundation, write to the Free Software Foundation; we
     sometimes make exceptions for this.  Our decision will be guided by the
     two goals of preserving the free status of all derivatives of our free
     software and of promoting the sharing and reuse of software generally.

                                NO WARRANTY

       9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
     WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
     EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
     OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
     EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS
     WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
     ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

       10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
     WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
     AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU
     FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
     CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
     PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
     RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
     FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
     SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
     DAMAGES.

                         END OF TERMS AND CONDITIONS

            Appendix: How to Apply These Terms to Your New Programs

       If you develop a new program, and you want it to be of the greatest
     possible use to humanity, the best way to achieve this is to make it
     free software which everyone can redistribute and change under these
     terms.

       To do so, attach the following notices to the program.  It is safest
     to attach them to the start of each source file to most effectively
     convey the exclusion of warranty; and each file should have at least
     the "copyright" line and a pointer to where the full notice is found.

         <one line to give the program's name and a brief idea of what it
         does.>
         Copyright (C) 19yy  <name of author>

         This program is free software; you can redistribute it and/or
         modify it under the terms of the GNU General Public License as
         published by the Free Software Foundation; either version 1, or (at
         your option) any later version.

         This program is distributed in the hope that it will be useful,
         but WITHOUT ANY WARRANTY; without even the implied warranty of
         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
         GNU General Public License for more details.

         You should have received a copy of the GNU General Public License
         along with this program; if not, write to the Free Software
         Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
         02110-1301 USA

     Also add information on how to contact you by electronic and paper
     mail.

     If the program is interactive, make it output a short notice like this
     when it starts in an interactive mode:

         Gnomovision version 69, Copyright (C) 19xx name of author
         Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type
         'show w'.  This is free software, and you are welcome to
         redistribute it under certain conditions; type 'show c' for
         details.

     The hypothetical commands 'show w' and 'show c' should show the
     appropriate parts of the General Public License.  Of course, the
     commands you use may be called something other than 'show w' and 'show
     c'; they could even be mouse-clicks or menu items--whatever suits your
     program.

     You should also get your employer (if you work as a programmer) or your
     school, if any, to sign a "copyright disclaimer" for the program, if
     necessary.  Here a sample; alter the names:

       Yoyodyne, Inc., hereby disclaims all copyright interest in the
       program 'Gnomovision' (a program to direct compilers to make passes
       at assemblers) written by James Hacker.

       <signature of Ty Coon>, 1 April 1989
       Ty Coon, President of Vice

     That's all there is to it!