| paul@3 | 1 | GNU GENERAL PUBLIC LICENSE
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| paul@3 | 2 | Version 2, June 1991
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| paul@3 | 3 |
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| paul@3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
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| paul@3 | 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| paul@3 | 6 | Everyone is permitted to copy and distribute verbatim copies
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| paul@3 | 7 | of this license document, but changing it is not allowed.
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| paul@3 | 8 |
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| paul@3 | 9 | Preamble
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| paul@3 | 10 |
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| paul@3 | 11 | The licenses for most software are designed to take away your
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| paul@3 | 12 | freedom to share and change it. By contrast, the GNU General Public
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| paul@3 | 13 | License is intended to guarantee your freedom to share and change free
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| paul@3 | 14 | software--to make sure the software is free for all its users. This
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| paul@3 | 15 | General Public License applies to most of the Free Software
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| paul@3 | 16 | Foundation's software and to any other program whose authors commit to
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| paul@3 | 17 | using it. (Some other Free Software Foundation software is covered by
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| paul@3 | 18 | the GNU Lesser General Public License instead.) You can apply it to
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| paul@3 | 19 | your programs, too.
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| paul@3 | 20 |
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| paul@3 | 21 | When we speak of free software, we are referring to freedom, not
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| paul@3 | 22 | price. Our General Public Licenses are designed to make sure that you
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| paul@3 | 23 | have the freedom to distribute copies of free software (and charge for
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| paul@3 | 24 | this service if you wish), that you receive source code or can get it
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| paul@3 | 25 | if you want it, that you can change the software or use pieces of it
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| paul@3 | 26 | in new free programs; and that you know you can do these things.
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| paul@3 | 27 |
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| paul@3 | 28 | To protect your rights, we need to make restrictions that forbid
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| paul@3 | 29 | anyone to deny you these rights or to ask you to surrender the rights.
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| paul@3 | 30 | These restrictions translate to certain responsibilities for you if you
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| paul@3 | 31 | distribute copies of the software, or if you modify it.
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| paul@3 | 32 |
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| paul@3 | 33 | For example, if you distribute copies of such a program, whether
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| paul@3 | 34 | gratis or for a fee, you must give the recipients all the rights that
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| paul@3 | 35 | you have. You must make sure that they, too, receive or can get the
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| paul@3 | 36 | source code. And you must show them these terms so they know their
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| paul@3 | 37 | rights.
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| paul@3 | 38 |
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| paul@3 | 39 | We protect your rights with two steps: (1) copyright the software, and
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| paul@3 | 40 | (2) offer you this license which gives you legal permission to copy,
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| paul@3 | 41 | distribute and/or modify the software.
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| paul@3 | 42 |
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| paul@3 | 43 | Also, for each author's protection and ours, we want to make certain
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| paul@3 | 44 | that everyone understands that there is no warranty for this free
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| paul@3 | 45 | software. If the software is modified by someone else and passed on, we
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| paul@3 | 46 | want its recipients to know that what they have is not the original, so
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| paul@3 | 47 | that any problems introduced by others will not reflect on the original
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| paul@3 | 48 | authors' reputations.
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| paul@3 | 49 |
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| paul@3 | 50 | Finally, any free program is threatened constantly by software
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| paul@3 | 51 | patents. We wish to avoid the danger that redistributors of a free
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| paul@3 | 52 | program will individually obtain patent licenses, in effect making the
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| paul@3 | 53 | program proprietary. To prevent this, we have made it clear that any
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| paul@3 | 54 | patent must be licensed for everyone's free use or not licensed at all.
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| paul@3 | 55 |
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| paul@3 | 56 | The precise terms and conditions for copying, distribution and
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| paul@3 | 57 | modification follow.
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| paul@3 | 58 |
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| paul@3 | 59 | GNU GENERAL PUBLIC LICENSE
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| paul@3 | 60 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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| paul@3 | 61 |
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| paul@3 | 62 | 0. This License applies to any program or other work which contains
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| paul@3 | 63 | a notice placed by the copyright holder saying it may be distributed
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| paul@3 | 64 | under the terms of this General Public License. The "Program", below,
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| paul@3 | 65 | refers to any such program or work, and a "work based on the Program"
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| paul@3 | 66 | means either the Program or any derivative work under copyright law:
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| paul@3 | 67 | that is to say, a work containing the Program or a portion of it,
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| paul@3 | 68 | either verbatim or with modifications and/or translated into another
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| paul@3 | 69 | language. (Hereinafter, translation is included without limitation in
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| paul@3 | 70 | the term "modification".) Each licensee is addressed as "you".
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| paul@3 | 71 |
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| paul@3 | 72 | Activities other than copying, distribution and modification are not
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| paul@3 | 73 | covered by this License; they are outside its scope. The act of
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| paul@3 | 74 | running the Program is not restricted, and the output from the Program
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| paul@3 | 75 | is covered only if its contents constitute a work based on the
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| paul@3 | 76 | Program (independent of having been made by running the Program).
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| paul@3 | 77 | Whether that is true depends on what the Program does.
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| paul@3 | 78 |
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| paul@3 | 79 | 1. You may copy and distribute verbatim copies of the Program's
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| paul@3 | 80 | source code as you receive it, in any medium, provided that you
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| paul@3 | 81 | conspicuously and appropriately publish on each copy an appropriate
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| paul@3 | 82 | copyright notice and disclaimer of warranty; keep intact all the
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| paul@3 | 83 | notices that refer to this License and to the absence of any warranty;
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| paul@3 | 84 | and give any other recipients of the Program a copy of this License
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| paul@3 | 85 | along with the Program.
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| paul@3 | 86 |
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| paul@3 | 87 | You may charge a fee for the physical act of transferring a copy, and
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| paul@3 | 88 | you may at your option offer warranty protection in exchange for a fee.
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| paul@3 | 89 |
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| paul@3 | 90 | 2. You may modify your copy or copies of the Program or any portion
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| paul@3 | 91 | of it, thus forming a work based on the Program, and copy and
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| paul@3 | 92 | distribute such modifications or work under the terms of Section 1
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| paul@3 | 93 | above, provided that you also meet all of these conditions:
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| paul@3 | 94 |
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| paul@3 | 95 | a) You must cause the modified files to carry prominent notices
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| paul@3 | 96 | stating that you changed the files and the date of any change.
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| paul@3 | 97 |
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| paul@3 | 98 | b) You must cause any work that you distribute or publish, that in
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| paul@3 | 99 | whole or in part contains or is derived from the Program or any
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| paul@3 | 100 | part thereof, to be licensed as a whole at no charge to all third
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| paul@3 | 101 | parties under the terms of this License.
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| paul@3 | 102 |
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| paul@3 | 103 | c) If the modified program normally reads commands interactively
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| paul@3 | 104 | when run, you must cause it, when started running for such
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| paul@3 | 105 | interactive use in the most ordinary way, to print or display an
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| paul@3 | 106 | announcement including an appropriate copyright notice and a
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| paul@3 | 107 | notice that there is no warranty (or else, saying that you provide
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| paul@3 | 108 | a warranty) and that users may redistribute the program under
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| paul@3 | 109 | these conditions, and telling the user how to view a copy of this
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| paul@3 | 110 | License. (Exception: if the Program itself is interactive but
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| paul@3 | 111 | does not normally print such an announcement, your work based on
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| paul@3 | 112 | the Program is not required to print an announcement.)
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| paul@3 | 113 |
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| paul@3 | 114 | These requirements apply to the modified work as a whole. If
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| paul@3 | 115 | identifiable sections of that work are not derived from the Program,
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| paul@3 | 116 | and can be reasonably considered independent and separate works in
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| paul@3 | 117 | themselves, then this License, and its terms, do not apply to those
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| paul@3 | 118 | sections when you distribute them as separate works. But when you
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| paul@3 | 119 | distribute the same sections as part of a whole which is a work based
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| paul@3 | 120 | on the Program, the distribution of the whole must be on the terms of
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| paul@3 | 121 | this License, whose permissions for other licensees extend to the
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| paul@3 | 122 | entire whole, and thus to each and every part regardless of who wrote it.
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| paul@3 | 123 |
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| paul@3 | 124 | Thus, it is not the intent of this section to claim rights or contest
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| paul@3 | 125 | your rights to work written entirely by you; rather, the intent is to
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| paul@3 | 126 | exercise the right to control the distribution of derivative or
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| paul@3 | 127 | collective works based on the Program.
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| paul@3 | 128 |
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| paul@3 | 129 | In addition, mere aggregation of another work not based on the Program
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| paul@3 | 130 | with the Program (or with a work based on the Program) on a volume of
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| paul@3 | 131 | a storage or distribution medium does not bring the other work under
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| paul@3 | 132 | the scope of this License.
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| paul@3 | 133 |
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| paul@3 | 134 | 3. You may copy and distribute the Program (or a work based on it,
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| paul@3 | 135 | under Section 2) in object code or executable form under the terms of
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| paul@3 | 136 | Sections 1 and 2 above provided that you also do one of the following:
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| paul@3 | 137 |
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| paul@3 | 138 | a) Accompany it with the complete corresponding machine-readable
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| paul@3 | 139 | source code, which must be distributed under the terms of Sections
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| paul@3 | 140 | 1 and 2 above on a medium customarily used for software interchange; or,
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| paul@3 | 141 |
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| paul@3 | 142 | b) Accompany it with a written offer, valid for at least three
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| paul@3 | 143 | years, to give any third party, for a charge no more than your
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| paul@3 | 144 | cost of physically performing source distribution, a complete
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| paul@3 | 145 | machine-readable copy of the corresponding source code, to be
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| paul@3 | 146 | distributed under the terms of Sections 1 and 2 above on a medium
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| paul@3 | 147 | customarily used for software interchange; or,
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| paul@3 | 148 |
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| paul@3 | 149 | c) Accompany it with the information you received as to the offer
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| paul@3 | 150 | to distribute corresponding source code. (This alternative is
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| paul@3 | 151 | allowed only for noncommercial distribution and only if you
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| paul@3 | 152 | received the program in object code or executable form with such
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| paul@3 | 153 | an offer, in accord with Subsection b above.)
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| paul@3 | 154 |
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| paul@3 | 155 | The source code for a work means the preferred form of the work for
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| paul@3 | 156 | making modifications to it. For an executable work, complete source
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| paul@3 | 157 | code means all the source code for all modules it contains, plus any
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| paul@3 | 158 | associated interface definition files, plus the scripts used to
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| paul@3 | 159 | control compilation and installation of the executable. However, as a
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| paul@3 | 160 | special exception, the source code distributed need not include
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| paul@3 | 161 | anything that is normally distributed (in either source or binary
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| paul@3 | 162 | form) with the major components (compiler, kernel, and so on) of the
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| paul@3 | 163 | operating system on which the executable runs, unless that component
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| paul@3 | 164 | itself accompanies the executable.
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| paul@3 | 165 |
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| paul@3 | 166 | If distribution of executable or object code is made by offering
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| paul@3 | 167 | access to copy from a designated place, then offering equivalent
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| paul@3 | 168 | access to copy the source code from the same place counts as
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| paul@3 | 169 | distribution of the source code, even though third parties are not
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| paul@3 | 170 | compelled to copy the source along with the object code.
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| paul@3 | 171 |
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| paul@3 | 172 | 4. You may not copy, modify, sublicense, or distribute the Program
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| paul@3 | 173 | except as expressly provided under this License. Any attempt
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| paul@3 | 174 | otherwise to copy, modify, sublicense or distribute the Program is
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| paul@3 | 175 | void, and will automatically terminate your rights under this License.
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| paul@3 | 176 | However, parties who have received copies, or rights, from you under
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| paul@3 | 177 | this License will not have their licenses terminated so long as such
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| paul@3 | 178 | parties remain in full compliance.
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| paul@3 | 179 |
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| paul@3 | 180 | 5. You are not required to accept this License, since you have not
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| paul@3 | 181 | signed it. However, nothing else grants you permission to modify or
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| paul@3 | 182 | distribute the Program or its derivative works. These actions are
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| paul@3 | 183 | prohibited by law if you do not accept this License. Therefore, by
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| paul@3 | 184 | modifying or distributing the Program (or any work based on the
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| paul@3 | 185 | Program), you indicate your acceptance of this License to do so, and
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| paul@3 | 186 | all its terms and conditions for copying, distributing or modifying
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| paul@3 | 187 | the Program or works based on it.
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| paul@3 | 188 |
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| paul@3 | 189 | 6. Each time you redistribute the Program (or any work based on the
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| paul@3 | 190 | Program), the recipient automatically receives a license from the
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| paul@3 | 191 | original licensor to copy, distribute or modify the Program subject to
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| paul@3 | 192 | these terms and conditions. You may not impose any further
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| paul@3 | 193 | restrictions on the recipients' exercise of the rights granted herein.
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| paul@3 | 194 | You are not responsible for enforcing compliance by third parties to
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| paul@3 | 195 | this License.
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| paul@3 | 196 |
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| paul@3 | 197 | 7. If, as a consequence of a court judgment or allegation of patent
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| paul@3 | 198 | infringement or for any other reason (not limited to patent issues),
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| paul@3 | 199 | conditions are imposed on you (whether by court order, agreement or
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| paul@3 | 200 | otherwise) that contradict the conditions of this License, they do not
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| paul@3 | 201 | excuse you from the conditions of this License. If you cannot
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| paul@3 | 202 | distribute so as to satisfy simultaneously your obligations under this
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| paul@3 | 203 | License and any other pertinent obligations, then as a consequence you
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| paul@3 | 204 | may not distribute the Program at all. For example, if a patent
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| paul@3 | 205 | license would not permit royalty-free redistribution of the Program by
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| paul@3 | 206 | all those who receive copies directly or indirectly through you, then
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| paul@3 | 207 | the only way you could satisfy both it and this License would be to
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| paul@3 | 208 | refrain entirely from distribution of the Program.
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| paul@3 | 209 |
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| paul@3 | 210 | If any portion of this section is held invalid or unenforceable under
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| paul@3 | 211 | any particular circumstance, the balance of the section is intended to
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| paul@3 | 212 | apply and the section as a whole is intended to apply in other
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| paul@3 | 213 | circumstances.
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| paul@3 | 214 |
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| paul@3 | 215 | It is not the purpose of this section to induce you to infringe any
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| paul@3 | 216 | patents or other property right claims or to contest validity of any
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| paul@3 | 217 | such claims; this section has the sole purpose of protecting the
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| paul@3 | 218 | integrity of the free software distribution system, which is
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| paul@3 | 219 | implemented by public license practices. Many people have made
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| paul@3 | 220 | generous contributions to the wide range of software distributed
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| paul@3 | 221 | through that system in reliance on consistent application of that
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| paul@3 | 222 | system; it is up to the author/donor to decide if he or she is willing
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| paul@3 | 223 | to distribute software through any other system and a licensee cannot
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| paul@3 | 224 | impose that choice.
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| paul@3 | 225 |
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| paul@3 | 226 | This section is intended to make thoroughly clear what is believed to
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| paul@3 | 227 | be a consequence of the rest of this License.
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| paul@3 | 228 |
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| paul@3 | 229 | 8. If the distribution and/or use of the Program is restricted in
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| paul@3 | 230 | certain countries either by patents or by copyrighted interfaces, the
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| paul@3 | 231 | original copyright holder who places the Program under this License
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| paul@3 | 232 | may add an explicit geographical distribution limitation excluding
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| paul@3 | 233 | those countries, so that distribution is permitted only in or among
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| paul@3 | 234 | countries not thus excluded. In such case, this License incorporates
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| paul@3 | 235 | the limitation as if written in the body of this License.
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| paul@3 | 236 |
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| paul@3 | 237 | 9. The Free Software Foundation may publish revised and/or new versions
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| paul@3 | 238 | of the General Public License from time to time. Such new versions will
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| paul@3 | 239 | be similar in spirit to the present version, but may differ in detail to
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| paul@3 | 240 | address new problems or concerns.
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| paul@3 | 241 |
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| paul@3 | 242 | Each version is given a distinguishing version number. If the Program
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| paul@3 | 243 | specifies a version number of this License which applies to it and "any
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| paul@3 | 244 | later version", you have the option of following the terms and conditions
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| paul@3 | 245 | either of that version or of any later version published by the Free
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| paul@3 | 246 | Software Foundation. If the Program does not specify a version number of
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| paul@3 | 247 | this License, you may choose any version ever published by the Free Software
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| paul@3 | 248 | Foundation.
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| paul@3 | 249 |
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| paul@3 | 250 | 10. If you wish to incorporate parts of the Program into other free
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| paul@3 | 251 | programs whose distribution conditions are different, write to the author
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| paul@3 | 252 | to ask for permission. For software which is copyrighted by the Free
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| paul@3 | 253 | Software Foundation, write to the Free Software Foundation; we sometimes
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| paul@3 | 254 | make exceptions for this. Our decision will be guided by the two goals
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| paul@3 | 255 | of preserving the free status of all derivatives of our free software and
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| paul@3 | 256 | of promoting the sharing and reuse of software generally.
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| paul@3 | 257 |
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| paul@3 | 258 | NO WARRANTY
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| paul@3 | 259 |
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| paul@3 | 260 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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| paul@3 | 261 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
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| paul@3 | 262 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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| paul@3 | 263 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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| paul@3 | 264 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| paul@3 | 265 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
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| paul@3 | 266 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
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| paul@3 | 267 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
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| paul@3 | 268 | REPAIR OR CORRECTION.
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| paul@3 | 269 |
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| paul@3 | 270 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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| paul@3 | 271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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| paul@3 | 272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
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| paul@3 | 273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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| paul@3 | 274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
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| paul@3 | 275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
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| paul@3 | 276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
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| paul@3 | 277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
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| paul@3 | 278 | POSSIBILITY OF SUCH DAMAGES.
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| paul@3 | 279 |
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| paul@3 | 280 | END OF TERMS AND CONDITIONS
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| paul@3 | 281 |
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| paul@3 | 282 | How to Apply These Terms to Your New Programs
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| paul@3 | 283 |
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| paul@3 | 284 | If you develop a new program, and you want it to be of the greatest
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| paul@3 | 285 | possible use to the public, the best way to achieve this is to make it
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| paul@3 | 286 | free software which everyone can redistribute and change under these terms.
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| paul@3 | 287 |
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| paul@3 | 288 | To do so, attach the following notices to the program. It is safest
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| paul@3 | 289 | to attach them to the start of each source file to most effectively
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| paul@3 | 290 | convey the exclusion of warranty; and each file should have at least
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| paul@3 | 291 | the "copyright" line and a pointer to where the full notice is found.
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| paul@3 | 292 |
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| paul@3 | 293 | <one line to give the program's name and a brief idea of what it does.>
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| paul@3 | 294 | Copyright (C) <year> <name of author>
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| paul@3 | 295 |
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| paul@3 | 296 | This program is free software; you can redistribute it and/or modify
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| paul@3 | 297 | it under the terms of the GNU General Public License as published by
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| paul@3 | 298 | the Free Software Foundation; either version 2 of the License, or
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| paul@3 | 299 | (at your option) any later version.
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| paul@3 | 300 |
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| paul@3 | 301 | This program is distributed in the hope that it will be useful,
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| paul@3 | 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| paul@3 | 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| paul@3 | 304 | GNU General Public License for more details.
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| paul@3 | 305 |
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| paul@3 | 306 | You should have received a copy of the GNU General Public License along
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| paul@3 | 307 | with this program; if not, write to the Free Software Foundation, Inc.,
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| paul@3 | 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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| paul@3 | 309 |
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| paul@3 | 310 | Also add information on how to contact you by electronic and paper mail.
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| paul@3 | 311 |
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| paul@3 | 312 | If the program is interactive, make it output a short notice like this
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| paul@3 | 313 | when it starts in an interactive mode:
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| paul@3 | 314 |
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| paul@3 | 315 | Gnomovision version 69, Copyright (C) year name of author
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| paul@3 | 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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| paul@3 | 317 | This is free software, and you are welcome to redistribute it
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| paul@3 | 318 | under certain conditions; type `show c' for details.
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| paul@3 | 319 |
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| paul@3 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate
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| paul@3 | 321 | parts of the General Public License. Of course, the commands you use may
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| paul@3 | 322 | be called something other than `show w' and `show c'; they could even be
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| paul@3 | 323 | mouse-clicks or menu items--whatever suits your program.
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| paul@3 | 324 |
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| paul@3 | 325 | You should also get your employer (if you work as a programmer) or your
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| paul@3 | 326 | school, if any, to sign a "copyright disclaimer" for the program, if
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| paul@3 | 327 | necessary. Here is a sample; alter the names:
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| paul@3 | 328 |
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| paul@3 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program
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| paul@3 | 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker.
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| paul@3 | 331 |
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| paul@3 | 332 | <signature of Ty Coon>, 1 April 1989
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| paul@3 | 333 | Ty Coon, President of Vice
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| paul@3 | 334 |
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| paul@3 | 335 | This General Public License does not permit incorporating your program into
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| paul@3 | 336 | proprietary programs. If your program is a subroutine library, you may
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| paul@3 | 337 | consider it more useful to permit linking proprietary applications with the
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| paul@3 | 338 | library. If this is what you want to do, use the GNU Lesser General
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| paul@3 | 339 | Public License instead of this License.
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