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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6
votes
1answer
46 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
28 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 ...
3
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1answer
26 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
51 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 ...
4
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2answers
77 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
59 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
20 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 += &...
1
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1answer
72 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
26 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
96 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
44 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 ...
9
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2answers
124 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
44 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 ...
11
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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
132 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 ...
2
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1answer
63 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
45 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
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1answer
167 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
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1answer
45 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
90 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
30 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
172 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
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2answers
134 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
535 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
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1answer
309 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 ...
0
votes
1answer
59 views

How can an AGPL library be more permissive when using the library's public APIs?

Server-client based HTTP open-source projects like MongoDB use AGPL/SSPL for their main backend implementation and use a more permissive license for their client so that devs embedding MongoDB clients ...
2
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1answer
43 views

Does the GPLv3 license on my project require me to also include the source code of a tool to edit the icon of my executable file?

Godot requires a tool called rcedit to change the application icon. According to my understanding of GPL, I believe I have to include the source code of Godot with the releases of my game. Do I also ...
6
votes
1answer
144 views

In which cases must I relicense my product under the CC BY-SA license?

Because copyright law can encompass a huge range of scenarios and be unclear to talk about in abstract terms, I'm going to give concrete examples. I understand CC BY is a permissive license. All it ...
4
votes
1answer
603 views

Are there any AGPL-style licences that require source code modifications to be public?

So my understanding of the AGPL, is that it requires modifications to be distributed to the users of the network service, but I'm looking for a licence that would require any modifications (non-...
7
votes
2answers
1k views

If I use a public API endpoint that has its source code licensed under AGPL in my app, do I need to disclose my source?

If there's a public API server that has it's source code licensed with AGPL, and if I make an app that uses these public endpoints in some part of it, (entire application doesn't necessarily depend on ...
1
vote
1answer
89 views

How do Wikipedia licenses, CC-BY-SA and GFDL differ?

Wikipedia licenses most of their text and images under two licenses, CC-BY-SA and GFDL. We can choose either of the licenses while using the work. I know both of them are copyleft licenses and ...
10
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2answers
1k views

Will adding a BY-SA image to a blog post make the entire post BY-SA?

I tried to read the license deed but it was too advanced for me to understand. Consider these 2 situations, I take a CC-BY-SA image and upload it to my blogpost it as is, without any modification. I ...
2
votes
1answer
62 views

My university is asking to choose between BY-SA and GFDL to release my work

An infographic I designed is to be uploaded to my university website. They have asked me to choose between the BY-SA and GFDL to release my work. I tried looking up the difference but I cannot find ...
4
votes
2answers
97 views

Amount and way of publishing under share-alike license

I found a small C++ code example (containing a function) that is under CC-BY-SA-4.0 license. I am thinking about revising that example, extending it to multiple functions and using it in a much bigger ...
6
votes
1answer
595 views

Why to prefer permissive license over copyleft license?

In open source software/projects why do people release there codes with permissive license instead of a copyleft license. I mean the original author will not get back much (if anything at all ) if he ...
2
votes
2answers
95 views

Are there advocates for open source, copyleft biology?

I know this might seem off-topic, but you can think of a living organism as a software, with its DNA/genome being the code. In that sense, there is a project aimed at discovering the source code of ...
4
votes
1answer
121 views

Is there a license that “forces leaks”, so to speak?

I am looking for a license that "forces leaks", so to speak. What I mean by that is: A copyright holder must convey a copy of derivatives works they made using the license to anyone who requests it. ...
1
vote
1answer
266 views

How does share-alike play with commercial use?

I'd like to know how a licence can both allow commercial use and be share-alike. My reasoning is as follow : If we use it in a product (which is authorized by the "commercial use" part), we have to ...
4
votes
1answer
62 views

Revert copyleft license without consent of all copyright holders

Let's say that Alice has started a project under a permissive license, e. g. MIT. Then Bob forked it and added some features. Now the project has two copyright holders, Alice and Bob. Then Bob decided ...
3
votes
1answer
175 views

Compatibility of RPL (Reciprocal Public License) with other licenses

I have found a library that I would like to use in my project "as-is", but it is licensed under the Reciprocal Public License. As far as I understand it, you have to make your source code using that ...
4
votes
1answer
303 views

How do I detect an AGPL violation?

For client side code, even if it is obfuscated or is just a binary, I can imagine there might be ways of doing this, but if I have some server-side AGPL licensed code, how am I supposed to know that ...
5
votes
2answers
314 views

Is there a good license for a libertarian programmer who's against intellectual property?

I know, I know, you're probably thinking CC0 or WTFPL or something along those lines. But the thing is, the way I see it, people have a right to redistribute anything, even if the author doesn't want ...
1
vote
1answer
904 views

Using iText library with AGPL license to make application open sourced

I am working on a project to generate a 508 compliant annual PDF Publication from our database using iText 7 java library. This library works great for accessible PDFs. We are in the process of ...
3
votes
1answer
166 views

How should I license my project if it can install GPL-based plugins?

I'm developing a software which has two parts, kernel and plugins, their code are completely separated. Here's the question: Some of the plugins should be GPL based, as they invoked GPL code. The ...
0
votes
0answers
16 views

can I use CC BY-SA 3.0 media (pictures) in a software partly licensed under a non-derivative license?

I am working on a software wich contains graphics i didn't make that are licensed under CC BY-SA 3.0. since the software contains other parts I didn't make, I want to put it under two different ...
4
votes
1answer
1k views

Is dual licensing a software that contains gpl programs possible?

I have seen that there is a question about gpl and dual licensing, but I know copyleft can behave different depending on the shape of the software. so here's my question: I have a package of lua ...
1
vote
1answer
108 views

Can you make GPL-licensed software using the Tizen SDK?

Unfortunately, Tizen has a proprietary SDK, as discussed here, which mandates that: You may not use any component part of the Tizen SDK in any way independent from the Tizen SDK. You may not load ...
7
votes
1answer
89 views

Can I license Latex code under GPL but the content under CC BY-SA?

I have written a non-trivial scientific text for university. It is written in Latex and I want to make the source available under GPL (v3 if that matters) so other can learn from my Latex skills. ...
0
votes
1answer
35 views

How to control content changes under a CC BY-SA

I am writing a fiction whose goal is to bring the reader to examine her/his political beliefs in the light of various political implications and then to arrive, on her/his own, at possibly different ...