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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2answers
36 views

Is it possible to have an MIT-licensed directory inside an MPL 2.0 repository?

I'm licensing my project under MPL 2.0, but I have a certain directory for utilities that I don't want to be under copyleft. If I put an MIT license in the said directory, can it override the MPL 2.0 ...
0
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0answers
37 views

How is "GPL-2 | GPL-3" to be interpreted?

A lot of packages in R (and I'm assuming in other languages as well) are licesed as "License: GPL-2 | GPL-3". Others as "GPL (>= 2)" and others as "MIT + file LICENSE"....
2
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1answer
41 views

Does using an AGPL 3.0 software via its REST API force to disclose source from calling software? [duplicate]

I'm currently developing a CMMS software. To allow pictures and other documents to be stored, I would like to use an Amazon S3-compatible API. To allow this, I was thinking of using Min.io server ...
0
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0answers
31 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
42 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 (...
30
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11answers
10k views

Is there a generally accepted "anti-copyleft" clause or license?

I would like to publish code for an application under an open source license like BSD, MIT, or Apache 2 which allows for changes and derivative works to be contributed back to the open source project ...
3
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2answers
85 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 ...
4
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1answer
109 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 ...
2
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2answers
40 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 ...
6
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0answers
71 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 ...
1
vote
1answer
67 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
376 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
vote
1answer
96 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
votes
2answers
71 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
vote
1answer
84 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
152 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
115 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 ...
1
vote
1answer
123 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 ...
-1
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2answers
91 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 ...
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
vote
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
227 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 ...
0
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1answer
171 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
34 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
131 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 ...
9
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2answers
832 views

Why to prefer permissive license over copyleft license?

In open source software/projects why do people release there codes with a permissive license instead of a copyleft license? I mean, the original author will not get back much (if anything at all) if ...
4
votes
1answer
213 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, ...
28
votes
3answers
2k views

What do I need to share if I include CC-BY-SA artwork in my software?

CC-BY-SA is a Creative Commons license with a copyleft clause - if you derive something from it, you must also provide the derivative under the same license if you distribute it. The relevant clause ...
-1
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1answer
50 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 ...
4
votes
3answers
94 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 ...
7
votes
3answers
848 views

Does OSL 3.0 require user access to source if I sell access to it as SAAS?

We are a small group of developers who are looking to base a product we have in development on a OSL 3.0 licensed Project (OroCRM). I have been having trouble understanding the exact terms of the OSL ...
0
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1answer
55 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 ...
4
votes
2answers
639 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-...
6
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1answer
86 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
votes
1answer
69 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 ...
5
votes
2answers
107 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 ...
25
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4answers
2k views

What are the arguments for considering dynamic links not to constitute derivative works?

The status of programs which are dynamically linked with Copyleft licensed binaries (such as a .dll) is contentious. I have created two questions for each side of the debate. The other can be found ...
4
votes
1answer
103 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
vote
1answer
77 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
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) ...
7
votes
2answers
292 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?
3
votes
1answer
105 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 ...
3
votes
1answer
137 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
3answers
469 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 ...
10
votes
2answers
422 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
votes
0answers
63 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
votes
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 ...