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1 GNU GENERAL PUBLIC LICENSE
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2 Version 1, February 1989
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3
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4 Copyright (C) 1989 Free Software Foundation, Inc.
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5 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
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6 Everyone is permitted to copy and distribute verbatim copies
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7 of this license document, but changing it is not allowed.
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8
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9 Preamble
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10
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11 The license agreements of most software companies try to keep users
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12 at the mercy of those companies. By contrast, our General Public
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13 License is intended to guarantee your freedom to share and change free
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14 software--to make sure the software is free for all its users. The
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15 General Public License applies to the Free Software Foundation's
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16 software and to any other program whose authors commit to using it.
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17 You can use it for your programs, too.
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18
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19 When we speak of free software, we are referring to freedom, not
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20 price. Specifically, the General Public License is designed to make
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21 sure that you have the freedom to give away or sell copies of free
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22 software, that you receive source code or can get it if you want it,
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23 that you can change the software or use pieces of it in new free
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24 programs; and that you know you can do these things.
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25
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26 To protect your rights, we need to make restrictions that forbid
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27 anyone to deny you these rights or to ask you to surrender the rights.
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28 These restrictions translate to certain responsibilities for you if you
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29 distribute copies of the software, or if you modify it.
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30
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31 For example, if you distribute copies of a such a program, whether
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32 gratis or for a fee, you must give the recipients all the rights that
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33 you have. You must make sure that they, too, receive or can get the
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34 source code. And you must tell them their rights.
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35
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36 We protect your rights with two steps: (1) copyright the software, and
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37 (2) offer you this license which gives you legal permission to copy,
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38 distribute and/or modify the software.
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39
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40 Also, for each author's protection and ours, we want to make certain
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41 that everyone understands that there is no warranty for this free
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42 software. If the software is modified by someone else and passed on, we
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43 want its recipients to know that what they have is not the original, so
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44 that any problems introduced by others will not reflect on the original
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45 authors' reputations.
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46
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47 The precise terms and conditions for copying, distribution and
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48 modification follow.
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49
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50 GNU GENERAL PUBLIC LICENSE
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51 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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52
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53 0. This License Agreement applies to any program or other work which
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54 contains a notice placed by the copyright holder saying it may be
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55 distributed under the terms of this General Public License. The
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56 "Program", below, refers to any such program or work, and a "work based
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57 on the Program" means either the Program or any work containing the
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58 Program or a portion of it, either verbatim or with modifications. Each
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59 licensee is addressed as "you".
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60
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61 1. You may copy and distribute verbatim copies of the Program's source
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62 code as you receive it, in any medium, provided that you conspicuously and
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63 appropriately publish on each copy an appropriate copyright notice and
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64 disclaimer of warranty; keep intact all the notices that refer to this
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65 General Public License and to the absence of any warranty; and give any
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66 other recipients of the Program a copy of this General Public License
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67 along with the Program. You may charge a fee for the physical act of
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68 transferring a copy.
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69
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70 2. You may modify your copy or copies of the Program or any portion of
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71 it, and copy and distribute such modifications under the terms of Paragraph
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72 1 above, provided that you also do the following:
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73
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74 a) cause the modified files to carry prominent notices stating that
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75 you changed the files and the date of any change; and
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76
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77 b) cause the whole of any work that you distribute or publish, that
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78 in whole or in part contains the Program or any part thereof, either
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79 with or without modifications, to be licensed at no charge to all
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80 third parties under the terms of this General Public License (except
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81 that you may choose to grant warranty protection to some or all
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82 third parties, at your option).
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83
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84 c) If the modified program normally reads commands interactively when
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85 run, you must cause it, when started running for such interactive use
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86 in the simplest and most usual way, to print or display an
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87 announcement including an appropriate copyright notice and a notice
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88 that there is no warranty (or else, saying that you provide a
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89 warranty) and that users may redistribute the program under these
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90 conditions, and telling the user how to view a copy of this General
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91 Public License.
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92
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93 d) You may charge a fee for the physical act of transferring a
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94 copy, and you may at your option offer warranty protection in
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95 exchange for a fee.
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96
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97 Mere aggregation of another independent work with the Program (or its
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98 derivative) on a volume of a storage or distribution medium does not bring
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99 the other work under the scope of these terms.
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100
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101 3. You may copy and distribute the Program (or a portion or derivative of
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102 it, under Paragraph 2) in object code or executable form under the terms of
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103 Paragraphs 1 and 2 above provided that you also do one of the following:
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104
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105 a) accompany it with the complete corresponding machine-readable
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106 source code, which must be distributed under the terms of
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107 Paragraphs 1 and 2 above; or,
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108
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109 b) accompany it with a written offer, valid for at least three
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110 years, to give any third party free (except for a nominal charge
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111 for the cost of distribution) a complete machine-readable copy of the
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112 corresponding source code, to be distributed under the terms of
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113 Paragraphs 1 and 2 above; or,
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114
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115 c) accompany it with the information you received as to where the
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116 corresponding source code may be obtained. (This alternative is
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117 allowed only for noncommercial distribution and only if you
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118 received the program in object code or executable form alone.)
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119
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120 Source code for a work means the preferred form of the work for making
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121 modifications to it. For an executable file, complete source code means
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122 all the source code for all modules it contains; but, as a special
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123 exception, it need not include source code for modules which are standard
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124 libraries that accompany the operating system on which the executable
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125 file runs, or for standard header files or definitions files that
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126 accompany that operating system.
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127
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128 4. You may not copy, modify, sublicense, distribute or transfer the
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129 Program except as expressly provided under this General Public License.
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130 Any attempt otherwise to copy, modify, sublicense, distribute or transfer
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131 the Program is void, and will automatically terminate your rights to use
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132 the Program under this License. However, parties who have received
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133 copies, or rights to use copies, from you under this General Public
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134 License will not have their licenses terminated so long as such parties
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135 remain in full compliance.
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136
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137 5. By copying, distributing or modifying the Program (or any work based
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138 on the Program) you indicate your acceptance of this license to do so,
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139 and all its terms and conditions.
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140
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141 6. Each time you redistribute the Program (or any work based on the
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142 Program), the recipient automatically receives a license from the original
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143 licensor to copy, distribute or modify the Program subject to these
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144 terms and conditions. You may not impose any further restrictions on the
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145 recipients' exercise of the rights granted herein.
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146
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147 7. The Free Software Foundation may publish revised and/or new versions
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148 of the General Public License from time to time. Such new versions will
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149 be similar in spirit to the present version, but may differ in detail to
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150 address new problems or concerns.
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151
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152 Each version is given a distinguishing version number. If the Program
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153 specifies a version number of the license which applies to it and "any
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154 later version", you have the option of following the terms and conditions
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155 either of that version or of any later version published by the Free
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156 Software Foundation. If the Program does not specify a version number of
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157 the license, you may choose any version ever published by the Free Software
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158 Foundation.
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159
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160 8. If you wish to incorporate parts of the Program into other free
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161 programs whose distribution conditions are different, write to the author
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162 to ask for permission. For software which is copyrighted by the Free
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163 Software Foundation, write to the Free Software Foundation; we sometimes
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164 make exceptions for this. Our decision will be guided by the two goals
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165 of preserving the free status of all derivatives of our free software and
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166 of promoting the sharing and reuse of software generally.
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167
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168 NO WARRANTY
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169
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170 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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171 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
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172 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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173 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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174 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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175 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
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176 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
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177 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
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178 REPAIR OR CORRECTION.
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179
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180 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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181 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
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182 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
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183 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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184 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
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185 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
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186 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
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187 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
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188 POSSIBILITY OF SUCH DAMAGES.
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189
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190 END OF TERMS AND CONDITIONS
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191
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192 Appendix: How to Apply These Terms to Your New Programs
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193
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194 If you develop a new program, and you want it to be of the greatest
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195 possible use to humanity, the best way to achieve this is to make it
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196 free software which everyone can redistribute and change under these
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197 terms.
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198
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199 To do so, attach the following notices to the program. It is safest to
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200 attach them to the start of each source file to most effectively convey
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201 the exclusion of warranty; and each file should have at least the
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202 "copyright" line and a pointer to where the full notice is found.
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203
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204 <one line to give the program's name and a brief idea of what it does.>
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205 Copyright (C) 19yy <name of author>
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206
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207 This program is free software; you can redistribute it and/or modify
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208 it under the terms of the GNU General Public License as published by
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209 the Free Software Foundation; either version 1, or (at your option)
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210 any later version.
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211
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212 This program is distributed in the hope that it will be useful,
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213 but WITHOUT ANY WARRANTY; without even the implied warranty of
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214 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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215 GNU General Public License for more details.
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216
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217 You should have received a copy of the GNU General Public License
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218 along with this program; if not, write to the Free Software Foundation,
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219 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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220
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221 Also add information on how to contact you by electronic and paper mail.
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222
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223 If the program is interactive, make it output a short notice like this
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224 when it starts in an interactive mode:
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225
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226 Gnomovision version 69, Copyright (C) 19xx name of author
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227 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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228 This is free software, and you are welcome to redistribute it
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229 under certain conditions; type `show c' for details.
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230
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231 The hypothetical commands `show w' and `show c' should show the
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232 appropriate parts of the General Public License. Of course, the
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233 commands you use may be called something other than `show w' and `show
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234 c'; they could even be mouse-clicks or menu items--whatever suits your
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235 program.
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236
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237 You should also get your employer (if you work as a programmer) or your
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238 school, if any, to sign a "copyright disclaimer" for the program, if
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239 necessary. Here a sample; alter the names:
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240
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241 Yoyodyne, Inc., hereby disclaims all copyright interest in the
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242 program `Gnomovision' (a program to direct compilers to make passes
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243 at assemblers) written by James Hacker.
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244
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245 <signature of Ty Coon>, 1 April 1989
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246 Ty Coon, President of Vice
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247
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248 That's all there is to it!
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