Documentation for “Zerocat Label Documentation”
Generated on: Tue, 03 Jun 2025 18:56:25 +0200
Repository: git://zerocat.org/zerocat/projects/doc
Version: v0.2.4-0-86e12c3
Branch: master
Copyright (C) 2016 hoki hkienle@posteo.de
Copyright (C) 2016 kai kmx@posteo.net
Copyright (C) 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 Kai Mertens kmx@posteo.net
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".
The goal of Zerocat Label Documentation is to provide you with some general information about the label itself, in opposite to project specific infos.
It is assumed that you are running a GNU/Linux-libre operating system. We recommend to run GNU Guix System – alternatively, install the GNU Guix package manager.
Use Git to clone the project’s sources:
$ git clone git://zerocat.org/zerocat/projects/doc
Change into the project’s documentation folder:
$ cd doc/doc/
Study this README.md to get started:
$ cat ../doc/README.md
All paths within the documentation are relative to the location of the
documentation source files, which are located in this project’s doc/
folder.
Versions are tagged according to the following pattern:
v<major>.<minor>.<revision>
<major> – The resulting product is a major change or upgrade.<minor> – Additional functionality or new features are introduced.<revision> – Bug fixes, minor changes, graphical stuff.A tag should be annotated with related change log entries.
The first tag should be: v0.0.0
To checkout a version tag, run:
git checkout vx.x.x
However, this should be optional.
Using the tip of branch master should be just fine.
Use GNU Make to create a dedicated profile, and an up-to-date profile generation. This allows you to match your environment to the one used by Zerocat, thus yielding for bit-identical results:
$ make -C ../guix pull
Checkout the profile generation, instantiate channels, create a pure shell that provides nothing but prerequisites:
$ make -C ../guix environment
To confirm that your project environment is properly set up, run:
[env]$ make -C ../guix usage
Invocations of make to generate the documentation, compile the
sources, etc., should be done from this project environment, only.
To restore the initial environment, later on, when you are done with this project, type:
[env]$ exit
To remove this project’s handy guix profile, type:
$ make -C ../guix clean
This will remove symlinks only. If you want to remove the profile from your system, run the GNU Guix Garbage Collector.
To list all available targets, type:
$ make -C ../guix help
To build the documentation, type:
[env]$ make -C ../doc
The terminal output should provide a shortcut to the index.html file
of the generated HTML documentation. Open this file with your favorite
browser.
To get a full list of available targets, type:
[env]$ make -C ../doc help
To clean-up, type:
[env]$ make -C ../doc clean
To build the documentation in one go, type:
$ echo "make -C ../doc" | make -C ../guix environment
Documentation source files are written in markdown syntax. They should carry their individual copyright and license notices right below the title giving headline, e.g.:
<Title-of-Document>
===================
Copyright (C) <Year> <Name-of-Author> <Email-Address>
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
Texts. A copy of the license is included in the section entitled
"GNU Free Documentation License".
<Other-Headline>
----------------
...content...
The generated documentation carries a license notice right at top on
its title page, with copyright statements generated from git log
output.
Sections of the generated documentation are build from selected markdown source files, with their individual copyright and license notice stripped.
In order to enrich the generated documentation ...
*.md markdown source files to ../doc/.... and adapt ../doc/Makefile to produce nice output.
In case more tools are needed, don't forget to update ../guix/manifest0.scm.
To make your image look nice within the documentation, select a landscape layout of 16:9 aspect ratio.
Use ImageMagick to prepare your image, e.g.:
If your image is big, reduce it to a maximal width of 2000 pixel:
mogrify -resize 2000x <image>
Please clean image files from metadata, before committing, i.e.:
mogrify -strip <image>
If you embed your image into a markdown documentation file, use this syntax:
![<path/to/image>][]
[<path/to/image>]: <path/to/image> "title message"
or alternatly:
![<path/to/image>][my-image-shortcut]
[my-image-shortcut]: <path/to/image> "title message"
These patterns will guarantee that <img> tags will have their src,
alt and title attributes properly set within the html output.
Please use this license header for code source files:
Zerocat Label Documentation --- Generic Information
Copyright (C) <Year> <Name-of-Author> <Email-Address>
This file is part of Zerocat Label Documentation.
Zerocat Label Documentation 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.
Zerocat Label Documentation 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 Zerocat Label Documentation.
If not, see <http://www.gnu.org/licenses/>.
If you intend to write shell scripts, use this skeleton to make them work for GNU Guix:
#!/bin/sh
# Re-exec if we are not using Bash or are using Bash in POSIX mode.
if [ -z "$BASH" ] || [ "$BASH" = "/bin/sh" ]; then
bash=`command -v bash`
if [ -z "$bash" ]; then
echo "Couldn't find Bash, sorry!"
exit 1
else
exec "$bash" "$0" "$@"
fi
fi
# We're using Bash now.
set -o errexit
set -o nounset
set -o pipefail
# Your code goes here ...
Update ../doc/CHANGES.md and list your contributions.
You can use git shortlog to get a starting point for your edit.
Zerocat Label Documentation ships copyrighted work.
Zerocat Label Documentation is free software. It makes use of free software licenses as recognized by Free Software Foundation (FSF), and should be freely distributable:
Files located in folder hardware/, if available, describe hardware
of a free design, licensed under:
Authorship, copyright and license information may be provided in more detail on a per-folder and/or per-file basis. Check the sources.
Please report a bug if you find the distribution hindered.
See Zerocat Website for contact information.
Change Logs can be created with:
git shortlog vx.x.x..HEAD | tac | sed -r -e '1d; s/^[ ]*/* /; $d;' -
commit 03d0f7cca1git log output.This version comes with a new documentation system, according to: Zerocat Project Template v0.0.12
File ../images/ce-marking.png has been manually reproduced according to information given on: https://ec.europa.eu/growth/single-market/ce-marking_en
The domain names “www.zerocat.org” and “www.zerocat.de” are both pointing
to our server.
The server’s IP address is “185.242.113.29”.
Zerocat’s git repositories are hosted by user git, and access control
is managed by a gatekeeper. A client can talk to the server’s
gatekeeper using SSH authentication, thus the generation of an
SSH keypair might be required.
Please make sure the following programs are available on your machine:
git – Distributed version control systemopenssh – Client and server for the secure shell (ssh) protocolGet yourself prepared by studying the output of:
man git-cloneman sshman ssh-keygenman ssh-configYou can generate a new pair of SSH keys by running:
$ ssh-keygen\
-t rsa\
-b 4096\
-C ""\
-f ~/.ssh/my-zerocat-ssh-id
Adapt settings to your needs. This will create a pair of keys – a
secret and a public one, i.e.: ~/.ssh/my-zerocat-ssh-id and
~/.ssh/my-zerocat-ssh-id.pub
In case your public SSH key has been deposited on the server, you
might talk to the gatekeeper over ssh and use the info command to get
a full overview of repositories and of your current access permissions:
$ ssh -2 -4\
-i ~/.ssh/my-zerocat-ssh-id\
-p 32323\
git@zerocat.org info
Note, as default, this would look up your ~/.ssh/id_rsa file for
authentication, but you specified an individual identity file with the
-i option.
The gatekeeper offers some more commands, like:
help (lists all available commands)desc (describes a specified repository)Example:
$ ssh -2 -4\
-i ~/.ssh/my-zerocat-ssh-id\
-p 32323\
git@zerocat.org desc zerocat/projects/chipflasher
Note the server’s SSH Daemon is listening to port 32323 only.
The ssh client supports a configuration file named ~/.ssh/config,
where you can manually bundle the required credentials to make things
easier to deal with, e.g.:
~/.ssh/config
--------------------------------------
host git-gatekeeper-zerocat
user git
hostname 185.242.113.29
port 32323
identityfile ~/.ssh/my-zerocat-ssh-id
addressfamily inet
serveraliveinterval 60
serveralivecountmax 10
PubkeyAcceptedKeyTypes +ssh-rsa
$ git clone ssh://git-gatekeeper-zerocat/zerocat/projects/<project-name>
This will download the repository and sets origin to the same used
URL.
Now change into the newly created project folder and run git log
to see the project’s history.
Some repositories are publically accessible without authentication, i.e.:
You can clone them via git protocol, e.g.:
$ git clone git://zerocat.org/zerocat/projects/zerocat-mini-machine
These public projects and their prebuilt documentations are promoted on the website: http://www.zerocat.org/
Pro Git, Apress, 2nd edition, 2014
Git from the Bottom Up
The Thing About Git, explains git add --patch
fetch and merge vs. pull
gitk example run-through: Use gitk to understand git – merge and rebase
How to Write good Commit Messages
To ease collaboration, we would like to suggest the follwing settings
for your Git Configuration. You might place them in the .git/config
file of a project’s root folder, or – as an alternative – in your
global Git Configuration File ~/.gitconfig.
[user]
name = <your name>
email = <your email address>
signingkey = <your PGP key ID>
[commit]
gpgsign = true
[core]
editor = nano
[alias]
# git log:
# l: log, g: --graph --color,
# c: --oneline, s: --pretty=short, f: --pretty=format,
# a: --all
lg = log --graph --color --decorate
lga = log --graph --color --decorate --all
lgc = log --graph --color --decorate --oneline
lgca = log --graph --color --decorate --oneline --all
lgs = log --graph --color --decorate --pretty=short
lgsa = log --graph --color --decorate --pretty=short --all
lgf = log --graph --color --decorate --pretty=format:'%C(auto) %h %d %G? %aN %s'
lgfa = log --graph --color --decorate --pretty=format:'%C(auto) %h %d %G? %aN %s' --all
# git diff:
check = diff --check
[push]
default = simple
The [alias] section now contains some aliases for git log, and
commands like git lgca should help you to get a quick overview of the
repository’s history. In case you need to verify authors, use git
lgfa instead.
To see whether your changes would introduce misplaced white-space, run
git check as an alias of git diff --check.
When using GPG-signed commits as suggested by gpgsign = true in
section [commit], please check your ~/.gnupg/gpg-agent.conf to have
a line available which specifies a pinentry program, i.e.:
pinentry-program /usr/bin/pinentry
Inspired by "Pro Git" book.
# get started with a repository
git init
git clone
# show changes
git diff
git diff --cached # same as `--staged`
git status
git status -uno
git status -s
# commit changes
git commit -am "<commit message>" # fast commit of *all* changes
git add <file>
git add --patch
git commit -m "<commit message>" # fast commit of *staged* changes
git commit --no-status
git commit --uno
# rename or delete files
git mv
git rm
# work with branches
git branch # list local branches, mark current one
git branch <a-new-branch> # create a new local branch, but stay on current one
git checkout -b <a-new-branch> # create *and* checkout a new local branch
git stash # push away current changes which might hinder you to checkout elsewhere
git stash pop # pop previously pushed changes
# set up new-branch to track remote new-branch
git checkout new-branch
# delete branch upstream
git push origin :my-obsolete-branch
# delete local copies of already deleted upstream branches
git fetch --prune # refers to all local copies of remotes
# show history of commits
git log
git log --pretty=format:"%h %an %s" --graph
git log --abbrev-commit --pretty=oneline --graph
git log --abbrev-commit --pretty=medium
git log -p -2
git log --follow <filename>
# git configuration
git config --list
git config --add format.pretty oneline
git remote -v
git difftool --tool-help
# show differences between commits/ branches/ tags/ etc.
# in detail...: git diff <from> <to>
git diff master documentation
# in short...: git diff --stat <from> <to>
git diff --stat <refspec> HEAD # you can omit 'HEAD'
Project Initiator and Maintainer ...
master or asks contributors to do soContributors ...
Contributor
git branch my-new-branch ; git checkout my-new-branch
git add new-file-in-branch
...
git commit
...
git push origin my-new-branch # Announce this via email
git branch --set-upstream-to=origin/my-new-branch my-new-branch
...
...
git push origin --delete my-new-branch # We are done with the branch, delete on server
Others
git pull origin # Now new remote branches are visible
git checkout my-new-branch # Sets up tracking branch (git branch -vv)
...
...
git branch --delete my-new-branch # We are done with the branch, delete locally
Project Maintainer
git checkout master
git merge my-new-branch
The (original) language is described here: https://daringfireball.net/projects/markdown/
Plenty of variants and extensions are around:
There a many different translators available.
This is a C/C++ implementation with an extensive test suite: https://github.com/jgm/cmark
To run it:
cmark in.md > out.html
To get something quickly up and running for openSUSE there is the "discount" package available:
It consists of a single lisp file markdown-mode.el that needs to be
found in the Emacs load path. (Does not work with XEmacs.)
https://github.com/defunkt/markdown-mode
This is supposed to be as brief as possible. The goal is to capture a minimal subset of Markdown that is sufficent for our needs and is understood widely by various tools.
How to write markdown files, some guides:
<value>../doc/___*italic***bold*****bold italic***Maintain a copyright and license notice right below title giving, first headline. Maintain copyright statements without leading spaces, but with two spaces inbetween and at the end in order to force a line break:
Copyright (C) <Year> <Name-of-Author> <Email-Address>
... GNU-FDL License Notice ...
We can take inspiration from others, for example
Version 1.3, 3 November 2008
Copyright (C) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. http://fsf.org/
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
The purpose of this License is to make a manual, textbook, or other functional and useful document "free" in the sense of freedom: to assure everyone the effective freedom to copy and redistribute it, with or without modifying it, either commercially or noncommercially. Secondarily, this License preserves for the author and publisher a way to get credit for their work, while not being considered responsible for modifications made by others.
This License is a kind of "copyleft", which means that derivative works of the document must themselves be free in the same sense. It complements the GNU General Public License, which is a copyleft license designed for free software.
We have designed this License in order to use it for manuals for free software, because free software needs free documentation: a free program should come with manuals providing the same freedoms that the software does. But this License is not limited to software manuals; it can be used for any textual work, regardless of subject matter or whether it is published as a printed book. We recommend this License principally for works whose purpose is instruction or reference.
This License applies to any manual or other work, in any medium, that contains a notice placed by the copyright holder saying it can be distributed under the terms of this License. Such a notice grants a world-wide, royalty-free license, unlimited in duration, to use that work under the conditions stated herein. The "Document", below, refers to any such manual or work. Any member of the public is a licensee, and is addressed as "you". You accept the license if you copy, modify or distribute the work in a way requiring permission under copyright law.
A "Modified Version" of the Document means any work containing the Document or a portion of it, either copied verbatim, or with modifications and/or translated into another language.
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The "Invariant Sections" are certain Secondary Sections whose titles are designated, as being those of Invariant Sections, in the notice that says that the Document is released under this License. If a section does not fit the above definition of Secondary then it is not allowed to be designated as Invariant. The Document may contain zero Invariant Sections. If the Document does not identify any Invariant Sections then there are none.
The "Cover Texts" are certain short passages of text that are listed, as Front-Cover Texts or Back-Cover Texts, in the notice that says that the Document is released under this License. A Front-Cover Text may be at most 5 words, and a Back-Cover Text may be at most 25 words.
A "Transparent" copy of the Document means a machine-readable copy, represented in a format whose specification is available to the general public, that is suitable for revising the document straightforwardly with generic text editors or (for images composed of pixels) generic paint programs or (for drawings) some widely available drawing editor, and that is suitable for input to text formatters or for automatic translation to a variety of formats suitable for input to text formatters. A copy made in an otherwise Transparent file format whose markup, or absence of markup, has been arranged to thwart or discourage subsequent modification by readers is not Transparent. An image format is not Transparent if used for any substantial amount of text. A copy that is not "Transparent" is called "Opaque".
Examples of suitable formats for Transparent copies include plain ASCII without markup, Texinfo input format, LaTeX input format, SGML or XML using a publicly available DTD, and standard-conforming simple HTML, PostScript or PDF designed for human modification. Examples of transparent image formats include PNG, XCF and JPG. Opaque formats include proprietary formats that can be read and edited only by proprietary word processors, SGML or XML for which the DTD and/or processing tools are not generally available, and the machine-generated HTML, PostScript or PDF produced by some word processors for output purposes only.
The "Title Page" means, for a printed book, the title page itself, plus such following pages as are needed to hold, legibly, the material this License requires to appear in the title page. For works in formats which do not have any title page as such, "Title Page" means the text near the most prominent appearance of the work's title, preceding the beginning of the body of the text.
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A section "Entitled XYZ" means a named subunit of the Document whose title either is precisely XYZ or contains XYZ in parentheses following text that translates XYZ in another language. (Here XYZ stands for a specific section name mentioned below, such as "Acknowledgements", "Dedications", "Endorsements", or "History".) To "Preserve the Title" of such a section when you modify the Document means that it remains a section "Entitled XYZ" according to this definition.
The Document may include Warranty Disclaimers next to the notice which states that this License applies to the Document. These Warranty Disclaimers are considered to be included by reference in this License, but only as regards disclaiming warranties: any other implication that these Warranty Disclaimers may have is void and has no effect on the meaning of this License.
You may copy and distribute the Document in any medium, either commercially or noncommercially, provided that this License, the copyright notices, and the license notice saying this License applies to the Document are reproduced in all copies, and that you add no other conditions whatsoever to those of this License. You may not use technical measures to obstruct or control the reading or further copying of the copies you make or distribute. However, you may accept compensation in exchange for copies. If you distribute a large enough number of copies you must also follow the conditions in section 3.
You may also lend copies, under the same conditions stated above, and you may publicly display copies.
If you publish printed copies (or copies in media that commonly have printed covers) of the Document, numbering more than 100, and the Document's license notice requires Cover Texts, you must enclose the copies in covers that carry, clearly and legibly, all these Cover Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on the back cover. Both covers must also clearly and legibly identify you as the publisher of these copies. The front cover must present the full title with all words of the title equally prominent and visible. You may add other material on the covers in addition. Copying with changes limited to the covers, as long as they preserve the title of the Document and satisfy these conditions, can be treated as verbatim copying in other respects.
If the required texts for either cover are too voluminous to fit legibly, you should put the first ones listed (as many as fit reasonably) on the actual cover, and continue the rest onto adjacent pages.
If you publish or distribute Opaque copies of the Document numbering more than 100, you must either include a machine-readable Transparent copy along with each Opaque copy, or state in or with each Opaque copy a computer-network location from which the general network-using public has access to download using public-standard network protocols a complete Transparent copy of the Document, free of added material. If you use the latter option, you must take reasonably prudent steps, when you begin distribution of Opaque copies in quantity, to ensure that this Transparent copy will remain thus accessible at the stated location until at least one year after the last time you distribute an Opaque copy (directly or through your agents or retailers) of that edition to the public.
It is requested, but not required, that you contact the authors of the Document well before redistributing any large number of copies, to give them a chance to provide you with an updated version of the Document.
You may copy and distribute a Modified Version of the Document under the conditions of sections 2 and 3 above, provided that you release the Modified Version under precisely this License, with the Modified Version filling the role of the Document, thus licensing distribution and modification of the Modified Version to whoever possesses a copy of it. In addition, you must do these things in the Modified Version:
If the Modified Version includes new front-matter sections or appendices that qualify as Secondary Sections and contain no material copied from the Document, you may at your option designate some or all of these sections as invariant. To do this, add their titles to the list of Invariant Sections in the Modified Version's license notice. These titles must be distinct from any other section titles.
You may add a section Entitled "Endorsements", provided it contains nothing but endorsements of your Modified Version by various parties—for example, statements of peer review or that the text has been approved by an organization as the authoritative definition of a standard.
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You may combine the Document with other documents released under this License, under the terms defined in section 4 above for modified versions, provided that you include in the combination all of the Invariant Sections of all of the original documents, unmodified, and list them all as Invariant Sections of your combined work in its license notice, and that you preserve all their Warranty Disclaimers.
The combined work need only contain one copy of this License, and multiple identical Invariant Sections may be replaced with a single copy. If there are multiple Invariant Sections with the same name but different contents, make the title of each such section unique by adding at the end of it, in parentheses, the name of the original author or publisher of that section if known, or else a unique number. Make the same adjustment to the section titles in the list of Invariant Sections in the license notice of the combined work.
In the combination, you must combine any sections Entitled "History" in the various original documents, forming one section Entitled "History"; likewise combine any sections Entitled "Acknowledgements", and any sections Entitled "Dedications". You must delete all sections Entitled "Endorsements".
You may make a collection consisting of the Document and other documents released under this License, and replace the individual copies of this License in the various documents with a single copy that is included in the collection, provided that you follow the rules of this License for verbatim copying of each of the documents in all other respects.
You may extract a single document from such a collection, and distribute it individually under this License, provided you insert a copy of this License into the extracted document, and follow this License in all other respects regarding verbatim copying of that document.
A compilation of the Document or its derivatives with other separate and independent documents or works, in or on a volume of a storage or distribution medium, is called an "aggregate" if the copyright resulting from the compilation is not used to limit the legal rights of the compilation's users beyond what the individual works permit. When the Document is included in an aggregate, this License does not apply to the other works in the aggregate which are not themselves derivative works of the Document.
If the Cover Text requirement of section 3 is applicable to these copies of the Document, then if the Document is less than one half of the entire aggregate, the Document's Cover Texts may be placed on covers that bracket the Document within the aggregate, or the electronic equivalent of covers if the Document is in electronic form. Otherwise they must appear on printed covers that bracket the whole aggregate.
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If a section in the Document is Entitled "Acknowledgements", "Dedications", or "History", the requirement (section 4) to Preserve its Title (section 1) will typically require changing the actual title.
You may not copy, modify, sublicense, or distribute the Document except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense, or distribute it is void, and will automatically terminate your rights under this License.
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, receipt of a copy of some or all of the same material does not give you any rights to use it.
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Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. http://fsf.org/
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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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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.
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.
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.
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.
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.
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.
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
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 <http://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 http://www.gnu.org/licenses/.
The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read http://www.gnu.org/philosophy/why-not-lgpl.html.