Add ddns.1 manpage.
[oddments/ddns.git] / COPYING
2 Version 3, 29 June 2007
4 Copyright (C) 2007 Free Software Foundation, Inc. <>
5 Everyone is permitted to copy and distribute verbatim copies
6 of this license document, but changing it is not allowed.
8 Preamble
10 The GNU General Public License is a free, copyleft license for
11software and other kinds of works.
13 The licenses for most software and other practical works are designed
14to take away your freedom to share and change the works. By contrast,
15the GNU General Public License is intended to guarantee your freedom to
16share and change all versions of a program--to make sure it remains free
17software for all its users. We, the Free Software Foundation, use the
18GNU General Public License for most of our software; it applies also to
19any other work released this way by its authors. You can apply it to
20your programs, too.
22 When we speak of free software, we are referring to freedom, not
23price. Our General Public Licenses are designed to make sure that you
24have the freedom to distribute copies of free software (and charge for
25them if you wish), that you receive source code or can get it if you
26want it, that you can change the software or use pieces of it in new
27free programs, and that you know you can do these things.
29 To protect your rights, we need to prevent others from denying you
30these rights or asking you to surrender the rights. Therefore, you have
31certain responsibilities if you distribute copies of the software, or if
32you modify it: responsibilities to respect the freedom of others.
34 For example, if you distribute copies of such a program, whether
35gratis or for a fee, you must pass on to the recipients the same
36freedoms that you received. You must make sure that they, too, receive
37or can get the source code. And you must show them these terms so they
38know their rights.
40 Developers that use the GNU GPL protect your rights with two steps:
41(1) assert copyright on the software, and (2) offer you this License
42giving you legal permission to copy, distribute and/or modify it.
44 For the developers' and authors' protection, the GPL clearly explains
45that there is no warranty for this free software. For both users' and
46authors' sake, the GPL requires that modified versions be marked as
47changed, so that their problems will not be attributed erroneously to
48authors of previous versions.
50 Some devices are designed to deny users access to install or run
51modified versions of the software inside them, although the manufacturer
52can do so. This is fundamentally incompatible with the aim of
53protecting users' freedom to change the software. The systematic
54pattern of such abuse occurs in the area of products for individuals to
55use, which is precisely where it is most unacceptable. Therefore, we
56have designed this version of the GPL to prohibit the practice for those
57products. If such problems arise substantially in other domains, we
58stand ready to extend this provision to those domains in future versions
59of the GPL, as needed to protect the freedom of users.
61 Finally, every program is threatened constantly by software patents.
62States should not allow patents to restrict development and use of
63software on general-purpose computers, but in those that do, we wish to
64avoid the special danger that patents applied to a free program could
65make it effectively proprietary. To prevent this, the GPL assures that
66patents cannot be used to render the program non-free.
68 The precise terms and conditions for copying, distribution and
69modification follow.
73 0. Definitions.
75 "This License" refers to version 3 of the GNU General Public License.
77 "Copyright" also means copyright-like laws that apply to other kinds of
78works, such as semiconductor masks.
80 "The Program" refers to any copyrightable work licensed under this
81License. Each licensee is addressed as "you". "Licensees" and
82"recipients" may be individuals or organizations.
84 To "modify" a work means to copy from or adapt all or part of the work
85in a fashion requiring copyright permission, other than the making of an
86exact copy. The resulting work is called a "modified version" of the
87earlier work or a work "based on" the earlier work.
89 A "covered work" means either the unmodified Program or a work based
90on the Program.
92 To "propagate" a work means to do anything with it that, without
93permission, would make you directly or secondarily liable for
94infringement under applicable copyright law, except executing it on a
95computer or modifying a private copy. Propagation includes copying,
96distribution (with or without modification), making available to the
97public, and in some countries other activities as well.
99 To "convey" a work means any kind of propagation that enables other
100parties to make or receive copies. Mere interaction with a user through
101a computer network, with no transfer of a copy, is not conveying.
103 An interactive user interface displays "Appropriate Legal Notices"
104to the extent that it includes a convenient and prominently visible
105feature that (1) displays an appropriate copyright notice, and (2)
106tells the user that there is no warranty for the work (except to the
107extent that warranties are provided), that licensees may convey the
108work under this License, and how to view a copy of this License. If
109the interface presents a list of user commands or options, such as a
110menu, a prominent item in the list meets this criterion.
112 1. Source Code.
114 The "source code" for a work means the preferred form of the work
115for making modifications to it. "Object code" means any non-source
116form of a work.
118 A "Standard Interface" means an interface that either is an official
119standard defined by a recognized standards body, or, in the case of
120interfaces specified for a particular programming language, one that
121is widely used among developers working in that language.
123 The "System Libraries" of an executable work include anything, other
124than the work as a whole, that (a) is included in the normal form of
125packaging a Major Component, but which is not part of that Major
126Component, and (b) serves only to enable use of the work with that
127Major Component, or to implement a Standard Interface for which an
128implementation is available to the public in source code form. A
129"Major Component", in this context, means a major essential component
130(kernel, window system, and so on) of the specific operating system
131(if any) on which the executable work runs, or a compiler used to
132produce the work, or an object code interpreter used to run it.
134 The "Corresponding Source" for a work in object code form means all
135the source code needed to generate, install, and (for an executable
136work) run the object code and to modify the work, including scripts to
137control those activities. However, it does not include the work's
138System Libraries, or general-purpose tools or generally available free
139programs which are used unmodified in performing those activities but
140which are not part of the work. For example, Corresponding Source
141includes interface definition files associated with source files for
142the work, and the source code for shared libraries and dynamically
143linked subprograms that the work is specifically designed to require,
144such as by intimate data communication or control flow between those
145subprograms and other parts of the work.
147 The Corresponding Source need not include anything that users
148can regenerate automatically from other parts of the Corresponding
151 The Corresponding Source for a work in source code form is that
152same work.
154 2. Basic Permissions.
156 All rights granted under this License are granted for the term of
157copyright on the Program, and are irrevocable provided the stated
158conditions are met. This License explicitly affirms your unlimited
159permission to run the unmodified Program. The output from running a
160covered work is covered by this License only if the output, given its
161content, constitutes a covered work. This License acknowledges your
162rights of fair use or other equivalent, as provided by copyright law.
164 You may make, run and propagate covered works that you do not
165convey, without conditions so long as your license otherwise remains
166in force. You may convey covered works to others for the sole purpose
167of having them make modifications exclusively for you, or provide you
168with facilities for running those works, provided that you comply with
169the terms of this License in conveying all material for which you do
170not control copyright. Those thus making or running the covered works
171for you must do so exclusively on your behalf, under your direction
172and control, on terms that prohibit them from making any copies of
173your copyrighted material outside their relationship with you.
175 Conveying under any other circumstances is permitted solely under
176the conditions stated below. Sublicensing is not allowed; section 10
177makes it unnecessary.
179 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
181 No covered work shall be deemed part of an effective technological
182measure under any applicable law fulfilling obligations under article
18311 of the WIPO copyright treaty adopted on 20 December 1996, or
184similar laws prohibiting or restricting circumvention of such
187 When you convey a covered work, you waive any legal power to forbid
188circumvention of technological measures to the extent such circumvention
189is effected by exercising rights under this License with respect to
190the covered work, and you disclaim any intention to limit operation or
191modification of the work as a means of enforcing, against the work's
192users, your or third parties' legal rights to forbid circumvention of
193technological measures.
195 4. Conveying Verbatim Copies.
197 You may convey verbatim copies of the Program's source code as you
198receive it, in any medium, provided that you conspicuously and
199appropriately publish on each copy an appropriate copyright notice;
200keep intact all notices stating that this License and any
201non-permissive terms added in accord with section 7 apply to the code;
202keep intact all notices of the absence of any warranty; and give all
203recipients a copy of this License along with the Program.
205 You may charge any price or no price for each copy that you convey,
206and you may offer support or warranty protection for a fee.
208 5. Conveying Modified Source Versions.
210 You may convey a work based on the Program, or the modifications to
211produce it from the Program, in the form of source code under the
212terms of section 4, provided that you also meet all of these conditions:
214 a) The work must carry prominent notices stating that you modified
215 it, and giving a relevant date.
217 b) The work must carry prominent notices stating that it is
218 released under this License and any conditions added under section
219 7. This requirement modifies the requirement in section 4 to
220 "keep intact all notices".
222 c) You must license the entire work, as a whole, under this
223 License to anyone who comes into possession of a copy. This
224 License will therefore apply, along with any applicable section 7
225 additional terms, to the whole of the work, and all its parts,
226 regardless of how they are packaged. This License gives no
227 permission to license the work in any other way, but it does not
228 invalidate such permission if you have separately received it.
230 d) If the work has interactive user interfaces, each must display
231 Appropriate Legal Notices; however, if the Program has interactive
232 interfaces that do not display Appropriate Legal Notices, your
233 work need not make them do so.
235 A compilation of a covered work with other separate and independent
236works, which are not by their nature extensions of the covered work,
237and which are not combined with it such as to form a larger program,
238in or on a volume of a storage or distribution medium, is called an
239"aggregate" if the compilation and its resulting copyright are not
240used to limit the access or legal rights of the compilation's users
241beyond what the individual works permit. Inclusion of a covered work
242in an aggregate does not cause this License to apply to the other
243parts of the aggregate.
245 6. Conveying Non-Source Forms.
247 You may convey a covered work in object code form under the terms
248of sections 4 and 5, provided that you also convey the
249machine-readable Corresponding Source under the terms of this License,
250in one of these ways:
252 a) Convey the object code in, or embodied in, a physical product
253 (including a physical distribution medium), accompanied by the
254 Corresponding Source fixed on a durable physical medium
255 customarily used for software interchange.
257 b) Convey the object code in, or embodied in, a physical product
258 (including a physical distribution medium), accompanied by a
259 written offer, valid for at least three years and valid for as
260 long as you offer spare parts or customer support for that product
261 model, to give anyone who possesses the object code either (1) a
262 copy of the Corresponding Source for all the software in the
263 product that is covered by this License, on a durable physical
264 medium customarily used for software interchange, for a price no
265 more than your reasonable cost of physically performing this
266 conveying of source, or (2) access to copy the
267 Corresponding Source from a network server at no charge.
269 c) Convey individual copies of the object code with a copy of the
270 written offer to provide the Corresponding Source. This
271 alternative is allowed only occasionally and noncommercially, and
272 only if you received the object code with such an offer, in accord
273 with subsection 6b.
275 d) Convey the object code by offering access from a designated
276 place (gratis or for a charge), and offer equivalent access to the
277 Corresponding Source in the same way through the same place at no
278 further charge. You need not require recipients to copy the
279 Corresponding Source along with the object code. If the place to
280 copy the object code is a network server, the Corresponding Source
281 may be on a different server (operated by you or a third party)
282 that supports equivalent copying facilities, provided you maintain
283 clear directions next to the object code saying where to find the
284 Corresponding Source. Regardless of what server hosts the
285 Corresponding Source, you remain obligated to ensure that it is
286 available for as long as needed to satisfy these requirements.
288 e) Convey the object code using peer-to-peer transmission, provided
289 you inform other peers where the object code and Corresponding
290 Source of the work are being offered to the general public at no
291 charge under subsection 6d.
293 A separable portion of the object code, whose source code is excluded
294from the Corresponding Source as a System Library, need not be
295included in conveying the object code work.
297 A "User Product" is either (1) a "consumer product", which means any
298tangible personal property which is normally used for personal, family,
299or household purposes, or (2) anything designed or sold for incorporation
300into a dwelling. In determining whether a product is a consumer product,
301doubtful cases shall be resolved in favor of coverage. For a particular
302product received by a particular user, "normally used" refers to a
303typical or common use of that class of product, regardless of the status
304of the particular user or of the way in which the particular user
305actually uses, or expects or is expected to use, the product. A product
306is a consumer product regardless of whether the product has substantial
307commercial, industrial or non-consumer uses, unless such uses represent
308the only significant mode of use of the product.
310 "Installation Information" for a User Product means any methods,
311procedures, authorization keys, or other information required to install
312and execute modified versions of a covered work in that User Product from
313a modified version of its Corresponding Source. The information must
314suffice to ensure that the continued functioning of the modified object
315code is in no case prevented or interfered with solely because
316modification has been made.
318 If you convey an object code work under this section in, or with, or
319specifically for use in, a User Product, and the conveying occurs as
320part of a transaction in which the right of possession and use of the
321User Product is transferred to the recipient in perpetuity or for a
322fixed term (regardless of how the transaction is characterized), the
323Corresponding Source conveyed under this section must be accompanied
324by the Installation Information. But this requirement does not apply