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2 | GNU GENERAL PUBLIC LICENSE |
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3 | Version 2, June 1991 |
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4 | |
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5 | Copyright (C) 1989, 1991 Free Software Foundation, Inc. |
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6 | 675 Mass Ave, Cambridge, MA 02139, USA |
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7 | Everyone is permitted to copy and distribute verbatim copies |
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8 | of this license document, but changing it is not allowed. |
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9 | |
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10 | Preamble |
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11 | |
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12 | The licenses for most software are designed to take away your |
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13 | freedom to share and change it. By contrast, the GNU General Public |
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14 | License is intended to guarantee your freedom to share and change free |
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15 | software--to make sure the software is free for all its users. This |
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16 | General Public License applies to most of the Free Software |
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17 | Foundation's software and to any other program whose authors commit to |
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18 | using it. (Some other Free Software Foundation software is covered by |
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19 | the GNU Library General Public License instead.) You can apply it to |
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20 | your programs, too. |
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21 | |
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22 | When we speak of free software, we are referring to freedom, not |
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23 | price. Our General Public Licenses are designed to make sure that you |
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24 | have the freedom to distribute copies of free software (and charge for |
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25 | this service if you wish), that you receive source code or can get it |
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26 | if you want it, that you can change the software or use pieces of it |
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27 | in new free programs; and that you know you can do these things. |
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28 | |
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29 | To protect your rights, we need to make restrictions that forbid |
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30 | anyone to deny you these rights or to ask you to surrender the rights. |
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31 | These restrictions translate to certain responsibilities for you if you |
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32 | distribute copies of the software, or if you modify it. |
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33 | |
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34 | For example, if you distribute copies of such a program, whether |
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35 | gratis or for a fee, you must give the recipients all the rights that |
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36 | you have. You must make sure that they, too, receive or can get the |
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37 | source code. And you must show them these terms so they know their |
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38 | rights. |
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39 | |
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40 | We protect your rights with two steps: (1) copyright the software, and |
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41 | (2) offer you this license which gives you legal permission to copy, |
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42 | distribute and/or modify the software. |
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43 | |
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44 | Also, for each author's protection and ours, we want to make certain |
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45 | that everyone understands that there is no warranty for this free |
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46 | software. If the software is modified by someone else and passed on, we |
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47 | want its recipients to know that what they have is not the original, so |
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48 | that any problems introduced by others will not reflect on the original |
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49 | authors' reputations. |
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50 | |
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51 | Finally, any free program is threatened constantly by software |
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52 | patents. We wish to avoid the danger that redistributors of a free |
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53 | program will individually obtain patent licenses, in effect making the |
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54 | program proprietary. To prevent this, we have made it clear that any |
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55 | patent must be licensed for everyone's free use or not licensed at all. |
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56 | |
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57 | The precise terms and conditions for copying, distribution and |
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58 | modification follow. |
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59 | |
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60 | GNU GENERAL PUBLIC LICENSE |
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61 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION |
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62 | |
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63 | 0. This License applies to any program or other work which contains |
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64 | a notice placed by the copyright holder saying it may be distributed |
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65 | under the terms of this General Public License. The "Program", below, |
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66 | refers to any such program or work, and a "work based on the Program" |
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67 | means either the Program or any derivative work under copyright law: |
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68 | that is to say, a work containing the Program or a portion of it, |
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69 | either verbatim or with modifications and/or translated into another |
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70 | language. (Hereinafter, translation is included without limitation in |
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71 | the term "modification".) Each licensee is addressed as "you". |
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72 | |
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73 | Activities other than copying, distribution and modification are not |
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74 | covered by this License; they are outside its scope. The act of |
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75 | running the Program is not restricted, and the output from the Program |
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76 | is covered only if its contents constitute a work based on the |
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77 | Program (independent of having been made by running the Program). |
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78 | Whether that is true depends on what the Program does. |
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79 | |
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80 | 1. You may copy and distribute verbatim copies of the Program's |
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81 | source code as you receive it, in any medium, provided that you |
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82 | conspicuously and appropriately publish on each copy an appropriate |
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83 | copyright notice and disclaimer of warranty; keep intact all the |
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84 | notices that refer to this License and to the absence of any warranty; |
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85 | and give any other recipients of the Program a copy of this License |
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86 | along with the Program. |
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87 | |
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88 | You may charge a fee for the physical act of transferring a copy, and |
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89 | you may at your option offer warranty protection in exchange for a fee. |
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90 | |
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91 | 2. You may modify your copy or copies of the Program or any portion |
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92 | of it, thus forming a work based on the Program, and copy and |
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93 | distribute such modifications or work under the terms of Section 1 |
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94 | above, provided that you also meet all of these conditions: |
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95 | |
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96 | a) You must cause the modified files to carry prominent notices |
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97 | stating that you changed the files and the date of any change. |
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98 | |
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99 | b) You must cause any work that you distribute or publish, that in |
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100 | whole or in part contains or is derived from the Program or any |
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101 | part thereof, to be licensed as a whole at no charge to all third |
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102 | parties under the terms of this License. |
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103 | |
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104 | c) If the modified program normally reads commands interactively |
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105 | when run, you must cause it, when started running for such |
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106 | interactive use in the most ordinary way, to print or display an |
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107 | announcement including an appropriate copyright notice and a |
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108 | notice that there is no warranty (or else, saying that you provide |
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109 | a warranty) and that users may redistribute the program under |
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110 | these conditions, and telling the user how to view a copy of this |
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111 | License. (Exception: if the Program itself is interactive but |
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112 | does not normally print such an announcement, your work based on |
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113 | the Program is not required to print an announcement.) |
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114 | |
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115 | These requirements apply to the modified work as a whole. If |
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116 | identifiable sections of that work are not derived from the Program, |
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117 | and can be reasonably considered independent and separate works in |
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118 | themselves, then this License, and its terms, do not apply to those |
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119 | sections when you distribute them as separate works. But when you |
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120 | distribute the same sections as part of a whole which is a work based |
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121 | on the Program, the distribution of the whole must be on the terms of |
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122 | this License, whose permissions for other licensees extend to the |
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123 | entire whole, and thus to each and every part regardless of who wrote it. |
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124 | |
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125 | Thus, it is not the intent of this section to claim rights or contest |
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126 | your rights to work written entirely by you; rather, the intent is to |
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127 | exercise the right to control the distribution of derivative or |
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128 | collective works based on the Program. |
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129 | |
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130 | In addition, mere aggregation of another work not based on the Program |
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131 | with the Program (or with a work based on the Program) on a volume of |
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132 | a storage or distribution medium does not bring the other work under |
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133 | the scope of this License. |
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134 | |
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135 | 3. You may copy and distribute the Program (or a work based on it, |
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136 | under Section 2) in object code or executable form under the terms of |
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137 | Sections 1 and 2 above provided that you also do one of the following: |
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138 | |
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139 | a) Accompany it with the complete corresponding machine-readable |
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140 | source code, which must be distributed under the terms of Sections |
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141 | 1 and 2 above on a medium customarily used for software interchange; or, |
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142 | |
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143 | b) Accompany it with a written offer, valid for at least three |
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144 | years, to give any third party, for a charge no more than your |
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145 | cost of physically performing source distribution, a complete |
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146 | machine-readable copy of the corresponding source code, to be |
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147 | distributed under the terms of Sections 1 and 2 above on a medium |
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148 | customarily used for software interchange; or, |
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149 | |
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150 | c) Accompany it with the information you received as to the offer |
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151 | to distribute corresponding source code. (This alternative is |
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152 | allowed only for noncommercial distribution and only if you |
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153 | received the program in object code or executable form with such |
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154 | an offer, in accord with Subsection b above.) |
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155 | |
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156 | The source code for a work means the preferred form of the work for |
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157 | making modifications to it. For an executable work, complete source |
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158 | code means all the source code for all modules it contains, plus any |
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159 | associated interface definition files, plus the scripts used to |
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160 | control compilation and installation of the executable. However, as a |
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161 | special exception, the source code distributed need not include |
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162 | anything that is normally distributed (in either source or binary |
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163 | form) with the major components (compiler, kernel, and so on) of the |
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164 | operating system on which the executable runs, unless that component |
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165 | itself accompanies the executable. |
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166 | |
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167 | If distribution of executable or object code is made by offering |
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168 | access to copy from a designated place, then offering equivalent |
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169 | access to copy the source code from the same place counts as |
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170 | distribution of the source code, even though third parties are not |
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171 | compelled to copy the source along with the object code. |
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172 | |
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173 | 4. You may not copy, modify, sublicense, or distribute the Program |
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174 | except as expressly provided under this License. Any attempt |
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175 | otherwise to copy, modify, sublicense or distribute the Program is |
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176 | void, and will automatically terminate your rights under this License. |
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177 | However, parties who have received copies, or rights, from you under |
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178 | this License will not have their licenses terminated so long as such |
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179 | parties remain in full compliance. |
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180 | |
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181 | 5. You are not required to accept this License, since you have not |
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182 | signed it. However, nothing else grants you permission to modify or |
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183 | distribute the Program or its derivative works. These actions are |
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184 | prohibited by law if you do not accept this License. Therefore, by |
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185 | modifying or distributing the Program (or any work based on the |
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186 | Program), you indicate your acceptance of this License to do so, and |
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187 | all its terms and conditions for copying, distributing or modifying |
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188 | the Program or works based on it. |
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189 | |
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190 | 6. Each time you redistribute the Program (or any work based on the |
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191 | Program), the recipient automatically receives a license from the |
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192 | original licensor to copy, distribute or modify the Program subject to |
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193 | these terms and conditions. You may not impose any further |
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194 | restrictions on the recipients' exercise of the rights granted herein. |
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195 | You are not responsible for enforcing compliance by third parties to |
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196 | this License. |
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197 | |
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198 | 7. If, as a consequence of a court judgment or allegation of patent |
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199 | infringement or for any other reason (not limited to patent issues), |
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200 | conditions are imposed on you (whether by court order, agreement or |
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201 | otherwise) that contradict the conditions of this License, they do not |
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202 | excuse you from the conditions of this License. If you cannot |
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203 | distribute so as to satisfy simultaneously your obligations under this |
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204 | License and any other pertinent obligations, then as a consequence you |
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205 | may not distribute the Program at all. For example, if a patent |
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206 | license would not permit royalty-free redistribution of the Program by |
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207 | all those who receive copies directly or indirectly through you, then |
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208 | the only way you could satisfy both it and this License would be to |
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209 | refrain entirely from distribution of the Program. |
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210 | |
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211 | If any portion of this section is held invalid or unenforceable under |
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212 | any particular circumstance, the balance of the section is intended to |
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213 | apply and the section as a whole is intended to apply in other |
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214 | circumstances. |
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215 | |
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216 | It is not the purpose of this section to induce you to infringe any |
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217 | patents or other property right claims or to contest validity of any |
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218 | such claims; this section has the sole purpose of protecting the |
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219 | integrity of the free software distribution system, which is |
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220 | implemented by public license practices. Many people have made |
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221 | generous contributions to the wide range of software distributed |
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222 | through that system in reliance on consistent application of that |
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223 | system; it is up to the author/donor to decide if he or she is willing |
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224 | to distribute software through any other system and a licensee cannot |
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225 | impose that choice. |
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226 | |
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227 | This section is intended to make thoroughly clear what is believed to |
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228 | be a consequence of the rest of this License. |
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229 | |
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230 | 8. If the distribution and/or use of the Program is restricted in |
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231 | certain countries either by patents or by copyrighted interfaces, the |
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232 | original copyright holder who places the Program under this License |
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233 | may add an explicit geographical distribution limitation excluding |
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234 | those countries, so that distribution is permitted only in or among |
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235 | countries not thus excluded. In such case, this License incorporates |
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236 | the limitation as if written in the body of this License. |
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237 | |
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238 | 9. The Free Software Foundation may publish revised and/or new versions |
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239 | of the General Public License from time to time. Such new versions will |
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240 | be similar in spirit to the present version, but may differ in detail to |
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241 | address new problems or concerns. |
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242 | |
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243 | Each version is given a distinguishing version number. If the Program |
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244 | specifies a version number of this License which applies to it and "any |
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245 | later version", you have the option of following the terms and conditions |
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246 | either of that version or of any later version published by the Free |
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247 | Software Foundation. If the Program does not specify a version number of |
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248 | this License, you may choose any version ever published by the Free Software |
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249 | Foundation. |
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250 | |
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251 | 10. If you wish to incorporate parts of the Program into other free |
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252 | programs whose distribution conditions are different, write to the author |
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253 | to ask for permission. For software which is copyrighted by the Free |
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254 | Software Foundation, write to the Free Software Foundation; we sometimes |
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255 | make exceptions for this. Our decision will be guided by the two goals |
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256 | of preserving the free status of all derivatives of our free software and |
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257 | of promoting the sharing and reuse of software generally. |
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258 | |
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259 | NO WARRANTY |
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260 | |
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261 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
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262 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN |
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263 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES |
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264 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED |
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265 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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266 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS |
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267 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE |
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268 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, |
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269 | REPAIR OR CORRECTION. |
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270 | |
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271 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
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272 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
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273 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, |
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274 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING |
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275 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED |
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276 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY |
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277 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER |
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278 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE |
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279 | POSSIBILITY OF SUCH DAMAGES. |
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280 | |
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281 | END OF TERMS AND CONDITIONS |
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282 | |
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283 | Appendix: How to Apply These Terms to Your New Programs |
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284 | |
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285 | If you develop a new program, and you want it to be of the greatest |
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286 | possible use to the public, the best way to achieve this is to make it |
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287 | free software which everyone can redistribute and change under these terms. |
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288 | |
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289 | To do so, attach the following notices to the program. It is safest |
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290 | to attach them to the start of each source file to most effectively |
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291 | convey the exclusion of warranty; and each file should have at least |
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292 | the "copyright" line and a pointer to where the full notice is found. |
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293 | |
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294 | <one line to give the program's name and a brief idea of what it does.> |
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295 | Copyright (C) 19yy <name of author> |
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296 | |
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297 | This program is free software; you can redistribute it and/or modify |
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298 | it under the terms of the GNU General Public License as published by |
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299 | the Free Software Foundation; either version 2 of the License, or |
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300 | (at your option) any later version. |
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301 | |
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302 | This program is distributed in the hope that it will be useful, |
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303 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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304 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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305 | GNU General Public License for more details. |
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306 | |
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307 | You should have received a copy of the GNU General Public License |
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308 | along with this program; if not, write to the Free Software |
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309 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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310 | |
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311 | Also add information on how to contact you by electronic and paper mail. |
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312 | |
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313 | If the program is interactive, make it output a short notice like this |
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314 | when it starts in an interactive mode: |
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315 | |
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316 | Gnomovision version 69, Copyright (C) 19yy name of author |
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317 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. |
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318 | This is free software, and you are welcome to redistribute it |
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319 | under certain conditions; type `show c' for details. |
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320 | |
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321 | The hypothetical commands `show w' and `show c' should show the appropriate |
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322 | parts of the General Public License. Of course, the commands you use may |
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323 | be called something other than `show w' and `show c'; they could even be |
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324 | mouse-clicks or menu items--whatever suits your program. |
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325 | |
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326 | You should also get your employer (if you work as a programmer) or your |
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327 | school, if any, to sign a "copyright disclaimer" for the program, if |
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328 | necessary. Here is a sample; alter the names: |
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329 | |
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330 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program |
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331 | `Gnomovision' (which makes passes at compilers) written by James Hacker. |
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332 | |
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333 | <signature of Ty Coon>, 1 April 1989 |
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334 | Ty Coon, President of Vice |
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335 | |
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336 | This General Public License does not permit incorporating your program into |
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337 | proprietary programs. If your program is a subroutine library, you may |
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338 | consider it more useful to permit linking proprietary applications with the |
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339 | library. If this is what you want to do, use the GNU Library General |
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340 | Public License instead of this License. |
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