Questions tagged [copyleft]

For questions about the copyleft concept (also known as Share-Alike), a concept that promotes or enforces the use of the same or compatible license for derived works.

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18 views

Dual license GPL/non-commercial + commercial SDK license

Looking to release an open-source SDK, all of which uses novel code OR dependencies that are MIT/Apache. For the business model, I would like to sell commercial-use licenses for use with the SDK, ...
3
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1answer
36 views

AGPLv3, (DNS) Host files, and DNS SaaS

I co-develop a FOSS DNS client and a DNS stub-resolver which builds blocklists based off of the nextdns/metadata repository. Recently, I happened to notice that there's at least one AGPLv3 blocklist (...
3
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2answers
77 views

License where somebody can distribute modified binaries but if they do I can disassemble them and help myself to the changes

In my freetime I've started to develop this retrocomputing project. The nature of the community is such that as likely as not just going to pass around binaries and modify them as even attempt to ...
6
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0answers
67 views

Is a principle to distinguish "mere aggregation" vs "larger work" described in GPL FAQ universal?

When talking about "mere aggregation" vs "larger work", i.e. if a work under license X should be considered a separate program or a part of the larger work, GNU GPL license and its ...
2
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2answers
38 views

CC BY-NC-SA "ShareAlike" (source vs binaries)

If I use and adapt a part from the source code of an open-source (Java) project Licensed under CC BY-NC-SA (3.0) into my project : I know the "ShareAlike" requirement means I'll have to ...
1
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1answer
62 views

Ways to avoid section 10.2 of MPLv2

I am looking for a copyleft license. My issue with GPLv3 is that it is so hard to understand. I don't want to license my work under terms I do not even understand. Fundamentally, I don't understand it ...
3
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2answers
366 views

Is GPL copyleft triggered by distribution alone?

Would distributing a commercial closed source application along with a GPLd standalone binary, which the closed source application calls trigger the requirement to license whole app under GPL? (For ...
1
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1answer
82 views

Is copyleft triggered for a backend service with GPLv3 dependency dynamically linked, if the backend exposes public API endpoints for mobile client?

I'm trying to figure out if GPLv3 copyleft is triggered for the following scenario: A company has a backend service written in a dynamically typed programming language. The service has a bunch of ...
0
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2answers
64 views

Copyleft licenses that do not mandate free distribution?

The GPL tries to guarantee that a piece of software, and all derivative versions of that software, will allow anybody to use, study, modify, and distribute the software however they choose. I think ...
1
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1answer
76 views

How to use GPL-licensed project with MIT code snippet license correctly?

My company uses WordPress (GPL license), a child theme of a theme and plugins under GPL and just a few code snippets under the MIT license. Because the GPL license is the stronger license (MIT license ...
-1
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2answers
141 views

Am I violating the terms of the base licenses when I publish my project on GitHub without any license and/or links to authors of used components?

Many developers, students, etc. put their code on GitHub without any links to authors of used components and licenses. I tried find a new job and yesterday HR ask me create Rest API with django + drf ...
4
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2answers
110 views

What sort of requirements apply to (A)GPL software on an SSH server?

I'm trying to better understand the GNU AGPL. The only thing the AGPL is concerned with beyond the GPL is remote interaction: if you modify the Program, your modified version must prominently offer ...
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2answers
86 views

Extremely copyleft licenses enforcing redistribution of source code intended for internal use

I would like to release my software under stronger copyleft than GPL (and AGPL), namely I would like to impose the burden of releasing sources of any derivative work, even the work intended for ...
1
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1answer
120 views

Why doesn't the loading of GPLed JS in the browser count as distribution?

Let's say I have a GPL web app. Somebody forks it, adds some back end changes and hosts it. In theory, the person installing it is the user so they need the modified source code, not the people ...
33
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8answers
7k views

Under copyleft, why distinguish between "free as in free speech" and "free as in free beer"?

I'm having trouble wrapping my head around why copyleft libre software advocates say they advocate for "free as in free speech" software, rather than monetarily free software, when it seems ...
1
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1answer
40 views

AFL - obligation to distribute source code of derivative work?

AFL license states that "Licensor agrees to provide a machine-readable copy of the Source Code of the Original Work along with each copy of the Original Work that Licensor distributes. [...] As ...
7
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2answers
1k views

Does whole project need to be under GPLv3 when using a GPLv3 library

So I am creating an Android app that uses a Java module called core-ui which is licensed under GPLv3. If I am right, GPLv3 imposes to use the same license in my project as the license of the module. ...
0
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1answer
163 views

Why is the zlib license not considered copyleft?

The final term of the zlib license state This notice may not be removed or altered from any source distribution. However, the Wikipedia page lists Copyleft No The way I understand the above ...
1
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1answer
33 views

Use of a derivative of aGPL v3 licensed software as a single binary in my product

I intend to release a software product (package) that shall include an executable (binary) that makes use of a library licensed under GPL v3. The executable is not linked (neither statically nor ...
4
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1answer
179 views

How to use LGPL with embedded firmwares?

I am developing a firmware for embedded devices. The project contains many libraries, plus one main executable that uses all the libraries. Each component is compiled individually. In the final step, ...
4
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1answer
116 views

Custom Linux distro Copyright and license notices

I am developing a commercial product that ships with a custom embedded Linux distro (similar to Yocto), and am in the process of collecting the copyright and license notices to comply with the GPL ...
-1
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1answer
47 views

What counts as disclosing source for software licenses?

MPL v2, GPL v3 and other licenses alike require giving users access to source code. Having read both licenses, I did not come across specific examples of how to disclose source code, so my question is ...
0
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1answer
53 views

Is there a more radical approach against copyright than copyleft?

Up until recently I thought that copyleft supporters totally reject the concepts of copyright and content licensing but now I know that they don't totally reject these and their main goal is to ...
18
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3answers
4k views

Can I publish a GPL source I'm being paid for to develop?

For a popular program licensed under GPL3, a system of plugins exists. The program and the plugins are closely interoperable and exchange large structures of data, so the plugins will necessarily be ...
6
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1answer
80 views

Acceptable techniques to verify rootfs without circumventing gplv3 terms

GPLv3 has clause to ensure that device manufacturers are not circumventing "freedom to run modified software by users". 3. Protecting Users' Legal Rights From Anti-Circumvention Law states: ...
2
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1answer
65 views

Can I use a data file covered by MPL in a closed source commercial program?

I would like make use of the certifi library in my project, but I am not allowed to use any copy-left libraries, and certifi is MPL. Really the certifi library just provides a pem file of a bunch of ...
4
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3answers
89 views

Can I use documentation licensed under CC BY-SA 4.0 in an application?

There is a very complex API endpoint with a documentation licensed under CC BY-SA 4.0. Due to its complexity, I am considering developing a commercial visual drag & drop editor (single-page web ...
0
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1answer
214 views

How much of my code becomes GPL if I use some GPL code and how different does my code have to be to not be GPL?

I'm new to coding and I've found a lot of useful information regarding this question by reading online, but for whatever reason I simply can't find a simple answer to this. It's about using other ...
5
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2answers
106 views

Is it okay to combine a proprietary program with a GPL program after distribution?

I want to distribute a combined work containing program X, plugin P and plugin Q. Plugin P has a proprietary license (which allows redistribution) and plugin Q is distributed under the GPL. X has a ...
4
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1answer
102 views

Copyleft for screenplay that forces film to be free

Consider I wrote a screenplay or book and I want if someone make a film from it, share it with same license that I used (Or another free license that keeps this constraint). Is CC BY-SA okay? Or is ...
1
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1answer
70 views

Compliance issue with drools-compiler including Eclipse ECJ

We have an dependency to drools-compiler (Version 7.19.0.Final) in one of our microservices: // Drools Compiler :: https://mvnrepository.com/artifact/org.drools/drools-compiler libraryDependencies += &...
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1answer
74 views

What legal considerations needs to be made for distributing a commercial/closed source software which utilizes LGPLv2 open source libraries?

I am developing a Java web application which utilizes Open source libraries with LGPLv2.0 and v2.1 libraries without any modification. For distributing this software commercially, what legal ...
16
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1answer
4k views

I was told by a vendor who licenses their paid software under GPL v2 that I cannot include the software inside my framework. How so?

They're a pretty decently sized company within the space and I assume they did their due diligence and so, I'm wondering if I misunderstood something. Are you not allowed to include paid software (A) ...
3
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1answer
99 views

GPL/BSD-like Dual license add special clauses to the GPL

Quick question: I would like to publish a software under a self-written BSD-like license, and under the GPLv3. So far so good. If somebody would fork said project according to the GPL, I would, in my ...
2
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1answer
132 views

Is an open-source license an incentive for companies to buy an exception?

Assume we have a software which we developed completely ourselves from scratch. We are thinking of making the source code available to others, thus I am pondering what license to use. My question is: ...
4
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1answer
108 views

Licensing options for libre game built with MonoGame (Ms-PL)

I want to release a game built with the MonoGame framework, which includes the Ms-PL in its license. I want to include source code with my game and impose a strict requirement for others who modify or ...
10
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2answers
417 views

Is it legal to remove a dependency with a copyleft license from a proprietary project?

Imagine you have a proprietary project (non open source), and by mistake you added a dependency to a library with a strong copyleft license. You have already distributed your code. And you realize ...
2
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0answers
62 views

Licensing auto-generated code under MPL 2.0?

I am writing a specialized binary file parser using Kaitai Struct. In brief, the file formats are described in YAML documents according to a custom spec called KSY, which are then passed to a code ...
12
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1answer
2k views

Quoting GPL licensed text in presentation slides

There is an open source project licensed under the GPL v2. It does also contain textual files (JSON configuration examples). I would like to put those texts on slides in a presentation of mine. Does ...
1
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2answers
168 views

Copyleft license that explicitly disallows monetisation [duplicate]

I plan to open source a full-stack project (hardware schematics + firmware). I want to find a way of open sourcing it with a copyleft-style license that allows anyone to use, modify, and redistribute ...
3
votes
1answer
109 views

License for JSON database that prevents proprietary use

I'm building a database consisting of large JSON files, based on sources that are licensed under the public domain or CC-BY. I would like this database to remain open but I would also like to prevent ...
1
vote
1answer
74 views

What does AGPLv3.0 section 7f mean and can you give an example of its use?

In section 7 of the AGPLv3.0 there is the possibility to make limited changes to the license. I don't think I understand the changes allowed by subsection f) and I have certainly never seen it ...
4
votes
1answer
340 views

Forking an AGPL v3 project that went closed source?

A project (desktop app) that I've been using for a while has decided to go closed source. I fully respect the decision, but also have no interest in the direction where this new development is headed. ...
3
votes
1answer
54 views

Appropriate copyleft license for translation files

I'm using a GPL license (with an AppStore exception) for my app and CC BY-SA for the images used in the app, as I know the GPL isn't appropriate for artwork. However, I'm wondering what I should ...
2
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2answers
149 views

Distributing MIT application with GPLv3 plugin without releasing source for MIT application

We have a MIT licensed application which we sell packed under virtual appliance to our customers. the application has a marketplace where users can download and install additional plugins. We wish to ...
1
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0answers
35 views

Is use of Creative Common's BY-SA licensed database in software 'adaption'?

I am building a functionality in my propriety software for translation of names between Spanish (and other languages) and English. The translation function works by typing words in Spanish which then ...
7
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2answers
280 views

Creative Commons ShareAlike, weak or strong copyleft?

I am wondering whether Creative Commons ShareAlike is a weak or strong copyleft license. That is, does it allow linking with code with under a different license?
4
votes
2answers
166 views

Is Open Public License suitable for libraries?

I would like to know if the Open Public License (OPL) allows library being bundled together or be a part of other code covered by other license (e.g. standard copyright - closed source code). I found ...
7
votes
1answer
662 views

GPL Licensed Woocommerce paid plugins

I have very basic question. I'm building website service where I want to use WooCommerce Subscription and Membership plugins. These plugins are paid on the official websites, but there is written ...
1
vote
1answer
578 views

GPL with license exception for iOS?

I'd really like to use the GPL license for my cross-platform mobile app. I want to publish on the iOS AppStore, the terms of which indirectly prohibit the GPL from being used. What's the best way to ...