resources.stdlicenses.GPL-3.0-or-later Maven / Gradle / Ivy
GNU General Public License v3.0 or later | Software Package Data Exchange (SPDX)
GNU General Public License v3.0 or later
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GNU General Public License v3.0 or later
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GPL-3.0-or-later
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This license was released: 29 June 2007
Text
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright © 2007 Free Software Foundation, Inc.
<https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft
license for software and other kinds of works.
The licenses for most software and other practical works are designed to
take away your freedom to share and change the works. By contrast, the GNU
General Public License is intended to guarantee your freedom to share and
change all versions of a program--to make sure it remains free software
for all its users. We, the Free Software Foundation, use the GNU General
Public License for most of our software; it applies also to any other work
released this way by its authors. You can apply it to your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge
for them if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of
it in new free programs, and that you know you can do these things.
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or
if you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether gratis
or for a fee, you must pass on to the recipients the same freedoms that
you received. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their rights.
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.
For the developers' and authors' protection, the GPL clearly
explains that there is no warranty for this free software. For
both users' and authors' sake, the GPL requires that modified
versions be marked as changed, so that their problems will
not be attributed erroneously to authors of previous versions.
Some devices are designed to deny users access to install or run modified
versions of the software inside them, although the manufacturer can
do so. This is fundamentally incompatible with the aim of protecting
users' freedom to change the software. The systematic pattern of
such abuse occurs in the area of products for individuals to use,
which is precisely where it is most unacceptable. Therefore, we have
designed this version of the GPL to prohibit the practice for those
products. If such problems arise substantially in other domains,
we stand ready to extend this provision to those domains in future
versions of the GPL, as needed to protect the freedom of users.
Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish
to avoid the special danger that patents applied to a free program
could make it effectively proprietary. To prevent this, the GPL
assures that patents cannot be used to render the program non-free.
The precise terms and conditions for copying,
distribution and modification follow.
TERMS AND CONDITIONS
-
0.
Definitions.
"This License" refers to version 3 of the GNU General Public License.
"Copyright" also means copyright-like laws that apply
to other kinds of works, such as semiconductor masks.
"The Program" refers to any copyrightable work licensed under
this License. Each licensee is addressed as "you". "Licensees"
and "recipients" may be individuals or organizations.
To "modify" a work means to copy from or adapt all or part of the
work in a fashion requiring copyright permission, other than the
making of an exact copy. The resulting work is called a "modified
version" of the earlier work or a work "based on" the earlier work.
A "covered work" means either the unmodified
Program or a work based on the Program.
To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it
on a computer or modifying a private copy. Propagation includes
copying, distribution (with or without modification), making available
to the public, and in some countries other activities as well.
To "convey" a work means any kind of propagation
that enables other parties to make or receive copies.
Mere interaction with a user through a computer
network, with no transfer of a copy, is not conveying.
An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to
the extent that warranties are provided), that licensees may convey
the work under this License, and how to view a copy of this License.
If the interface presents a list of user commands or options,
such as a menu, a prominent item in the list meets this criterion.
-
1.
Source Code.
The "source code" for a work means the preferred
form of the work for making modifications to it.
"Object code" means any non-source form of a work.
A "Standard Interface" means an interface that either is an official
standard defined by a recognized standards body, or, in the case
of interfaces specified for a particular programming language,
one that is widely used among developers working in that language.
The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form
of packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form. A
"Major Component", in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.
The "Corresponding Source" for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts
to control those activities. However, it does not include the work's
System Libraries, or general-purpose tools or generally available
free programs which are used unmodified in performing those activities
but which are not part of the work. For example, Corresponding
Source includes interface definition files associated with source
files for the work, and the source code for shared libraries
and dynamically linked subprograms that the work is specifically
designed to require, such as by intimate data communication or
control flow between those subprograms and other parts of the work.
The Corresponding Source need not include anything that users can
regenerate automatically from other parts of the Corresponding Source.
The Corresponding Source for a work
in source code form is that same work.
-
2.
Basic Permissions.
All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met. This License explicitly affirms your unlimited
permission to run the unmodified Program. The output from running a
covered work is covered by this License only if the output, given its
content, constitutes a covered work. This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.
You may make, run and propagate covered works that you do not convey,
without conditions so long as your license otherwise remains in force.
You may convey covered works to others for the sole purpose of having
them make modifications exclusively for you, or provide you with
facilities for running those works, provided that you comply with
the terms of this License in conveying all material for which you do
not control copyright. Those thus making or running the covered works
for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies
of your copyrighted material outside their relationship with you.
Conveying under any other circumstances is permitted
solely under the conditions stated below. Sublicensing
is not allowed; section 10 makes it unnecessary.
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3.
Protecting Users' Legal Rights From Anti-Circumvention Law.
No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article
11 of the WIPO copyright treaty adopted on 20 December 1996, or
similar laws prohibiting or restricting circumvention of such measures.
When you convey a covered work, you waive any legal power to
forbid circumvention of technological measures to the extent
such circumvention is effected by exercising rights under this
License with respect to the covered work, and you disclaim any
intention to limit operation or modification of the work as a means
of enforcing, against the work's users, your or third parties'
legal rights to forbid circumvention of technological measures.
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4.
Conveying Verbatim Copies.
You may convey verbatim copies of the Program's source code as
you receive it, in any medium, provided that you conspicuously
and appropriately publish on each copy an appropriate copyright
notice; keep intact all notices stating that this License and any
non-permissive terms added in accord with section 7 apply to the
code; keep intact all notices of the absence of any warranty; and
give all recipients a copy of this License along with the Program.
You may charge any price or no price for each copy that you
convey, and you may offer support or warranty protection for a fee.
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5.
Conveying Modified Source Versions.
You may convey a work based on the Program, or the modifications to
produce it from the Program, in the form of source code under the terms
of section 4, provided that you also meet all of these conditions:
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a)
The work must carry prominent notices stating
that you modified it, and giving a relevant date.
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b)
The work must carry prominent notices stating that
it is released under this License and any conditions
added under section 7. This requirement modifies the
requirement in section 4 to "keep intact all notices".
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c)
You must license the entire work, as a whole, under this License
to anyone who comes into possession of a copy. This License
will therefore apply, along with any applicable section 7
additional terms, to the whole of the work, and all its parts,
regardless of how they are packaged. This License gives no
permission to license the work in any other way, but it does not
invalidate such permission if you have separately received it.
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d)
If the work has interactive user interfaces, each must
display Appropriate Legal Notices; however, if the Program
has interactive interfaces that do not display Appropriate
Legal Notices, your work need not make them do so.
A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered
work, and which are not combined with it such as to form a larger
program, in or on a volume of a storage or distribution medium,
is called an "aggregate" if the compilation and its resulting
copyright are not used to limit the access or legal rights
of the compilation's users beyond what the individual works
permit. Inclusion of a covered work in an aggregate does not
cause this License to apply to the other parts of the aggregate.
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6.
Conveying Non-Source Forms.
You may convey a covered work in object code form
under the terms of sections 4 and 5, provided that you
also convey the machine-readable Corresponding Source
under the terms of this License, in one of these ways:
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a)
Convey the object code in, or embodied in, a physical
product (including a physical distribution medium),
accompanied by the Corresponding Source fixed on a durable
physical medium customarily used for software interchange.
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b)
Convey the object code in, or embodied in, a physical product
(including a physical distribution medium), accompanied by a
written offer, valid for at least three years and valid for
as long as you offer spare parts or customer support for that
product model, to give anyone who possesses the object code
either (1) a copy of the Corresponding Source for all the software
in the product that is covered by this License, on a durable
physical medium customarily used for software interchange,
for a price no more than your reasonable cost of physically
performing this conveying of source, or (2) access to copy
the Corresponding Source from a network server at no charge.
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c)
Convey individual copies of the object code with a
copy of the written offer to provide the Corresponding
Source. This alternative is allowed only occasionally
and noncommercially, and only if you received the object
code with such an offer, in accord with subsection 6b.
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d)
Convey the object code by offering access from a designated place
(gratis or for a charge), and offer equivalent access to the
Corresponding Source in the same way through the same place at
no further charge. You need not require recipients to copy the
Corresponding Source along with the object code. If the place
to copy the object code is a network server, the Corresponding
Source may be on a different server (operated by you or a third
party) that supports equivalent copying facilities, provided you
maintain clear directions next to the object code saying where
to find the Corresponding Source. Regardless of what server hosts
the Corresponding Source, you remain obligated to ensure that it
is available for as long as needed to satisfy these requirements.
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e)
Convey the object code using peer-to-peer transmission,
provided you inform other peers where the object code
and Corresponding Source of the work are being offered
to the general public at no charge under subsection 6d.
A separable portion of the object code, whose source code is
excluded from the Corresponding Source as a System Library,
need not be included in conveying the object code work.
A "User Product" is either (1) a "consumer product", which means
any tangible personal property which is normally used for personal,
family, or household purposes, or (2) anything designed or sold
for incorporation into a dwelling. In determining whether a product
is a consumer product, doubtful cases shall be resolved in favor
of coverage. For a particular product received by a particular
user, "normally used" refers to a typical or common use of that
class of product, regardless of the status of the particular
user or of the way in which the particular user actually uses,
or expects or is expected to use, the product. A product is a
consumer product regardless of whether the product has substantial
commercial, industrial or non-consumer uses, unless such uses
represent the only significant mode of use of the product.
"Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required
to install and execute modified versions of a covered work in
that User Product from a modified version of its Corresponding
Source. The information must suffice to ensure that the continued
functioning of the modified object code is in no case prevented
or interfered with solely because modification has been made.
If you convey an object code work under this section in, or with,
or specifically for use in, a User Product, and the conveying
occurs as part of a transaction in which the right of possession
and use of the User Product is transferred to the recipient in
perpetuity or for a fixed term (regardless of how the transaction
is characterized), the Corresponding Source conveyed under this
section must be accompanied by the Installation Information.
But this requirement does not apply if neither you nor any third
party retains the ability to install modified object code on the
User Product (for example, the work has been installed in ROM).
The requirement to provide Installation Information does not
include a requirement to continue to provide support service,
warranty, or updates for a work that has been modified
or installed by the recipient, or for the User Product in
which it has been modified or installed. Access to a network
may be denied when the modification itself materially and
adversely affects the operation of the network or violates
the rules and protocols for communication across the network.
Corresponding Source conveyed, and Installation Information
provided, in accord with this section must be in a format that
is publicly documented (and with an implementation available
to the public in source code form), and must require no
special password or key for unpacking, reading or copying.
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7.
Additional Terms.
"Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program
shall be treated as though they were included in this License, to
the extent that they are valid under applicable law. If additional
permissions apply only to part of the Program, that part may be used
separately under those permissions, but the entire Program remains
governed by this License without regard to the additional permissions.
When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part
of it. (Additional permissions may be written to require their own
removal in certain cases when you modify the work.) You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.
Notwithstanding any other provision of this License, for material you
add to a covered work, you may (if authorized by the copyright holders
of that material) supplement the terms of this License with terms:
-
a)
Disclaiming warranty or limiting liability differently
from the terms of sections 15 and 16 of this License; or
-
b)
Requiring preservation of specified reasonable legal
notices or author attributions in that material or in the
Appropriate Legal Notices displayed by works containing it; or
-
c)
Prohibiting misrepresentation of the origin of that material,
or requiring that modified versions of such material be marked
in reasonable ways as different from the original version; or
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d)
Limiting the use for publicity purposes of names
of licensors or authors of the material; or
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e)
Declining to grant rights under trademark law for use
of some trade names, trademarks, or service marks; or
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f)
Requiring indemnification of licensors and authors of that
material by anyone who conveys the material (or modified
versions of it) with contractual assumptions of liability
to the recipient, for any liability that these contractual
assumptions directly impose on those licensors and authors.
All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10. If the Program
as you received it, or any part of it, contains a notice stating
that it is governed by this License along with a term that is
a further restriction, you may remove that term. If a license
document contains a further restriction but permits relicensing or
conveying under this License, you may add to a covered work material
governed by the terms of that license document, provided that the
further restriction does not survive such relicensing or conveying.
If you add terms to a covered work in accord with this
section, you must place, in the relevant source files, a
statement of the additional terms that apply to those files,
or a notice indicating where to find the applicable terms.
Additional terms, permissive or non-permissive, may be
stated in the form of a separately written license, or stated
as exceptions; the above requirements apply either way.
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8.
Termination.
You may not propagate or modify a covered work except as
expressly provided under this License. Any attempt otherwise
to propagate or modify it is void, and will automatically
terminate your rights under this License (including any patent
licenses granted under the third paragraph of section 11).
However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly
and finally terminates your license, and (b) permanently, if
the copyright holder fails to notify you of the violation by
some reasonable means prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you
of the violation by some reasonable means, this is the first
time you have received notice of violation of this License
(for any work) from that copyright holder, and you cure the
violation prior to 30 days after your receipt of the notice.
Termination of your rights under this section does not
terminate the licenses of parties who have received copies or
rights from you under this License. If your rights have been
terminated and not permanently reinstated, you do not qualify
to receive new licenses for the same material under section 10.
-
9.
Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate
or modify any covered work. These actions infringe copyright if you
do not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
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10.
Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License. You are not responsible
for enforcing compliance by third parties with this License.
An "entity transaction" is a transaction transferring control of
an organization, or substantially all assets of one, or subdividing
an organization, or merging organizations. If propagation of a
covered work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest,
if the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you
may not impose a license fee, royalty, or other charge for exercise
of rights granted under this License, and you may not initiate
litigation (including a cross-claim or counterclaim in a lawsuit)
alleging that any patent claim is infringed by making, using, selling,
offering for sale, or importing the Program or any portion of it.
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11.
Patents.
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent
claims owned or controlled by the contributor, whether already
acquired or hereafter acquired, that would be infringed by some
manner, permitted by this License, of making, using, or selling
its contributor version, but do not include claims that would
be infringed only as a consequence of further modification
of the contributor version. For purposes of this definition,
"control" includes the right to grant patent sublicenses in
a manner consistent with the requirements of this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims,
to make, use, sell, offer for sale, import and otherwise run,
modify and propagate the contents of its contributor version.
In the following three paragraphs, a "patent license" is any
express agreement or commitment, however denominated, not to
enforce a patent (such as an express permission to practice
a patent or covenant not to sue for patent infringement). To
"grant" such a patent license to a party means to make such an
agreement or commitment not to enforce a patent against the party.
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through
a publicly available network server or other readily accessible
means, then you must either (1) cause the Corresponding Source to
be so available, or (2) arrange to deprive yourself of the benefit
of the patent license for this particular work, or (3) arrange, in
a manner consistent with the requirements of this License, to extend
the patent license to downstream recipients. "Knowingly relying"
means you have actual knowledge that, but for the patent license, your
conveying the covered work in a country, or your recipient's use of
the covered work in a country, would infringe one or more identifiable
patents in that country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance
of, a covered work, and grant a patent license to some of the
parties receiving the covered work authorizing them to use,
propagate, modify or convey a specific copy of the covered work,
then the patent license you grant is automatically extended
to all recipients of the covered work and works based on it.
A patent license is "discriminatory" if it does not include within the
scope of its coverage, prohibits the exercise of, or is conditioned
on the non-exercise of one or more of the rights that are specifically
granted under this License. You may not convey a covered work if
you are a party to an arrangement with a third party that is in the
business of distributing software, under which you make payment to
the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or
limiting any implied license or other defenses to infringement
that may otherwise be available to you under applicable patent law.
-
12.
No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement
or otherwise) that contradict the conditions of this License,
they do not excuse you from the conditions of this License. If
you cannot convey a covered work so as to satisfy simultaneously
your obligations under this License and any other pertinent
obligations, then as a consequence you may not convey it at all.
For example, if you agree to terms that obligate you to collect
a royalty for further conveying from those to whom you convey the
Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
-
13.
Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into
a single combined work, and to convey the resulting work. The
terms of this License will continue to apply to the part which
is the covered work, but the special requirements of the GNU
Affero General Public License, section 13, concerning interaction
through a network will apply to the combination as such.
-
14.
Revised Versions of this License.
The Free Software Foundation may publish revised and/or new
versions of the GNU General Public License from time to time. Such
new versions will be similar in spirit to the present version,
but may differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU
General Public License "or any later version" applies to it,
you have the option of following the terms and conditions either
of that numbered version or of any later version published by
the Free Software Foundation. If the Program does not specify a
version number of the GNU General Public License, you may choose
any version ever published by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that
proxy's public statement of acceptance of a version permanently
authorizes you to choose that version for the Program.
Later license versions may give you additional or
different permissions. However, no additional obligations
are imposed on any author or copyright holder as a
result of your choosing to follow a later version.
-
15.
Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU
ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
16.
Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING
BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE
OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER
OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
-
17.
Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability
provided above cannot be given local legal effect according to
their terms, reviewing courts shall apply local law that most
closely approximates an absolute waiver of all civil liability in
connection with the Program, unless a warranty or assumption of
liability accompanies a copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be
of the greatest possible use to the public, the best
way to achieve this is to make it free software which
everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and
a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation, either version
3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General
Public License along with this program. If not, see
<https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a
short notice like this when it starts in an interactive mode:
<program> Copyright (C) <year>
<name of author>
This program comes with ABSOLUTELY NO
WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute
it under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should
show the appropriate parts of the General Public License.
Of course, your program's commands might be different;
for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a
programmer) or school, if any, to sign a "copyright disclaimer"
for the program, if necessary. For more information on
this, and how to apply and follow the GNU GPL, see
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