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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4
votes
1answer
111 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. ...
4
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2answers
91 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 ...
4
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1answer
60 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 ...
4
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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 ...
4
votes
1answer
271 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 ...
4
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1answer
100 views

Is it more accurate to compare CC BY-SA to LGPL rather than GPL?

CC BY-SA, LGPL and GPL are all copyleft licenses. GPL's key feature is that by embedding one work in another (as defined in a software context), the combined work becomes GPL. With LGPL this is not ...
4
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2answers
269 views

Can you use your own work in a closed source product if it's licensed under the GPL?

I'm new to licenses and don't really understand the difference between the license choices on GitHub. If you license your own work under the GNU General Public License, does this mean you wouldn't be ...
4
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1answer
145 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. ...
4
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3answers
176 views

Is linking a correct proxy for derivative work determination in (copyleft) FOSS licenses?

I tend to use these simple tests to determine if the copyleft terms of a third-party project apply to the calling/reusing code: if the calling code is linking (statically or dynamically) with GPL-...
4
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1answer
56 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 ...
4
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1answer
103 views

Are derived videos of ShareAlike licensed material subject to CC BY SA?

If a video were to include media released under a Creative Commons share-alike license, would the final video also need to be released under a similar license since it is a derivative?
4
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1answer
218 views

LGPL 2.1 snippet copyright attribution

I want to use portions of code from the FFMPEG library to provide screen capture function for a commercial application I'm writing. I do understand I need to make a shared library out of the function ...
4
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1answer
169 views

Under AGPLv3+ do I need to provide the source for secondary applications?

I am working on a central application (AGPL3+) that will control and/or provide access to multiple secondary applications, mostly on other servers. It is trivial for me to provide the source for the ...
4
votes
1answer
35 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 ...
3
votes
1answer
92 views

How much does code have to interact for the GPL to take effect?

The GPL says that if you use program A, you agree that if you make a program B that relies on program A, program B must be GPL (otherwise, you violate the GPL and therefore lose the right to use ...
3
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1answer
161 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 ...
3
votes
1answer
44 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 ...
3
votes
1answer
78 views

Open source licences and copyrighting

My question is: where lies the border for a programmer to copyright new software when in GNU/linux basically everything is released on very restrictive licences that force you to copyleft your work? ...
3
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2answers
73 views

JPEG comment to convey Copyleft Multi-Licenced Copyright Notice

This question is related to Copyleft Multi-Licenced Copyright Notice. I upload pictures on commons.wikimedia.org and I want to facilitate the reuse but I want derivatives stay "libre". Therefore I ...
3
votes
2answers
57 views

Copyleft Multi-Licenced Copyright Notice

I want to allow any usage/modification/distribution of my work except with the restriction that my work and derivatives must stay "libre". Therefore I think the right way is to publish my work under ...
3
votes
1answer
152 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 ...
3
votes
1answer
74 views

Manufacture PCB's using GPLv3 license

I own a startup company that manufactures PCB's. We decided to release them under the GPLv3 license to eliminate the hassles of patents and so forth. Another factor is that we use code on the ...
3
votes
1answer
119 views

Is a ROM image an “executable file” for GPL purposes?

I am planning to include a program covered by the GNU General Public License and a GPL-incompatible program in a collective work designed for a machine that executes programs from a cartridge ...
2
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3answers
426 views

Pacifist copyleft-like partially-open-source license [closed]

I'd like a license restricting use to non-military projects, but otherwise just like the GNU GPL. (There is obviously no point in making a permissive license like that, because editing a comment is ...
2
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4answers
427 views

How to anonymously submit GPL licensed source code to a science fair?

I've created a personal project and licensed it as GPL3 (I'm a fan of the open source movement). The source code is posted publicly on GitHub. I'm planning on submitting it to the Siemens Competition, ...
2
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2answers
94 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 ...
2
votes
1answer
90 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: ...
2
votes
1answer
61 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 ...
2
votes
1answer
57 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 ...
2
votes
1answer
42 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 ...
2
votes
1answer
59 views

Is there an existing license that is copy-left by default, but allows use in proprietary software through case-by-case negotiation?

I'm looking for a license which is designed such that anyone can use my code so long as the license they release it under is copy-left. However, I'd also like to be able to license my code out for ...
2
votes
1answer
16 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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2answers
74 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 ...
2
votes
1answer
189 views

Doom port on android. Does copy left apply?

I want to understand how the GPL license extends based on this practical example. There is an android port for doom called D-Touch This link Doom itself is licensed under GPLv2. Will the license ...
2
votes
1answer
138 views

CC BY-SA – Do I need to open source my app if I don’t really distribute it?

I started developing a commercial web application that uses spaCy – a MIT-licensed library for natural language processing. In order to use this library, one needs to initialize a processing pipeline ...
2
votes
0answers
39 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 ...
2
votes
1answer
69 views

Open source components in a larger one-off system setup

I'm in the early concept and planning stages of a large-ish interactive installation. The installation is a one-off for a large client; think a mix between science museum interactive stands/kiosk-type ...
1
vote
1answer
69 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 ...
1
vote
1answer
225 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 ...
1
vote
1answer
53 views

GPL copyright owner copyleft [duplicate]

If a GPL owner decides to make their code close sourced, say to make a derivative work for themselves (maybe commercialize), what steps should they take? If they need to rewrite their code, what ...
1
vote
1answer
137 views

Is there a temporary copyleft license?

Suppose I produce some work, and I want all derivative works released before the year 2030 to be open source under the same license, but during and after the year 2030 I wish to allow derivative works ...
1
vote
1answer
74 views

Is it possible to have a non-comercial license, while allowing commercial use of derivative works and further modification of the derivative work?

This is a somewhat complicated situation, and I have trouble finding a Creative Commons license that is appropriate. Here is what I want the license to do: Others should be able to redistribute my ...
1
vote
1answer
18 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
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 ...
1
vote
1answer
102 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 ...
1
vote
2answers
130 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 ...
1
vote
1answer
255 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 ...
1
vote
1answer
821 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 ...
1
vote
1answer
72 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 ...
1
vote
0answers
28 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 ...