Questions about the GNU General Public License

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-1
votes
1answer
74 views

Does using the Telegram API mandate releasing the source code under a GPL license? [closed]

Telegram has provided API, through which programmers can connect to telegram servers, enabling them to implement clients for the messaging system. They also have released some open source client ...
0
votes
1answer
100 views

Software piracy and GPL [duplicate]

Consider the case below: A Wordpress plugin must be GPL since Wordpress itself is GPL There are some plugin authors selling premium WordPress plugins, and assume the authors are okay with the GPL ...
0
votes
1answer
41 views

Required clarification about GPL licence for creating extensions of GPL software

I asked a question and received quite good answers. I read all answers and other sources about my question. I concluded that if I write my code and distribute it to my clients for a free under my own ...
-1
votes
0answers
70 views

I am using the Fat Free Framework, does my web app need to be under the GPL license? [duplicate]

I am building a Cart system over Fat Free PHP Framework (A.K.A F3). This framework comes under GPL v3 license. I have been searching the internet for many days to get answers to the following ...
4
votes
4answers
453 views

Licensing of content created by licensed code

So I had been using trianglify, and I was thinking about using an image that it had created. Trianglify is licensed under GPLv3, however, (as I understand it,) it creates unique svg files. The author ...
-2
votes
1answer
75 views

Shall i have to make my application code open source if using ejabberd? [duplicate]

I was looking into ejabberd and found it is licensed under GPLv2. Let's say that I am using it as follows: You will come to my website/app and login, then start a chat using Instant messanger. I will ...
1
vote
1answer
22 views

Piwik License question

I need to create a specialized analytics app based on Piwik, it will be a commercial SaaS service for small businesses. It uses the piwik javascript tracker, API and the DB to store events, custom ...
5
votes
1answer
171 views

Open Source license that prevents from bundling with adware?

I wrote a small tool I published on my blog. I did not even think about the license, just put the binaries there for everyone to download. Now I am thinking about making it open source (BSD or GPL) ...
1
vote
1answer
175 views

How and when had the CC BY license become GNU GPL-compatible?

I believed that Creative Commons Attribution License, even being non-copyleft one, was always and still is incompatible with GNU GPL because of multiple minor issues; which, however, were gradually ...
1
vote
2answers
166 views

Is Red Star OS released under the GPL? [closed]

According to Wikipedia, Red Star OS is is a North Korean Linux-based operating system Does that mean it's covered by the GPL, or are there exceptions?
0
votes
1answer
49 views

Can your staffs distibute your company non-distirbuted GPL licesned code?

Let say you use libmysqlclient to connect to MySQL, and since the client is GPL licensed and so your program. That's fine since you are the only one working on the project. Then, you have a staff to ...
0
votes
1answer
81 views

Can I use in a non-free script a code example that doesn't mention license but which is used by its author in a GPL'ed script?

After seeing the following question one of my problems came in mind: I want to couple two different scripts in two different languages. I found a solution for that, and I copied that solution. ...
0
votes
1answer
44 views

Different license for logo files

I'm working on a software that I intend to release under the terms of the GPL 3. However, I'd like to exempt the name and logo: the images with the logo should only be used with official releases, and ...
23
votes
7answers
2k views

Can I use GPL libraries temporarily for prototyping and make the future code closed source?

I am working on a prototype for a software system, which (at least at the start) will be closed source. In order to save time, I'm thinking of using (that is, statically linking) a library that is ...
0
votes
2answers
110 views

Can I license software under MIT license when using Librarys licensed under the GPL [duplicate]

I'm developing software that i want to license under the MIT License. My software uses libraries licensed under the GPL. I'm NOT recompiling, building, or modifying the Library but I am linking to it. ...
2
votes
1answer
47 views

Can tools.jar from OpenJDK can be installed in public repository

Is it legal to install tools.jar from OpenJDK in public maven repository? I found at least three topics on the Internet which conclusion was that such action is forbidden for jar provided by Oracle, ...
1
vote
1answer
60 views

Reimplementing algorithm from GPL program

If I reimplement an algorithm of a program covered by GPL v2 do I have to also license my program as GPL v2? And to be specific: I need a javascript library to compare debian packages versions. ...
0
votes
1answer
42 views

Mixing BSD + GPL, and dual licensing

I am the sole author of a piece of C++ software which so far I have kept under the GPL license. For uninteresting reasons, I am considering a switch to a MIT/BSD style license. As far as I have ...
0
votes
2answers
68 views

Can I modify existing GPL software to use a proprietary (closed-source) library and then distribute one or both?

Say I have GPL software A and proprietary library B. I modify A to use B. Am I then free to distribute A by itself? The GPL FAQ seems to indicate that is there case here: ...
3
votes
1answer
99 views

Do I need to include a copy of the GPL / LGPL to every copy of my program?

Is it necessary to include the GPL / LGPL license text to every distributed copy of my program? Or can I just put a link in the About-dialog?
2
votes
1answer
377 views

Copyleft Licenses - Need to attribute?

I'm currently evaluating which license to use for my next OS project, and things are getting more and more interesting after I decided that I really want to understand what the licenses mean. Up ...
69
votes
3answers
54k views

Can I use GPL software in a commercial application

I have 3 questions about the GPL here: If I use GPL software in my application, but don't modify or distribute it, do I have to release my application under the GPL? What if I modify some software ...
0
votes
1answer
34 views

How to distribute copyrighted resources with and open source project?

I would like to create an open source GPLv3 project that will work with other resources that are under different types of copyright (e.g. free to use, but must not sell). Because of this, I can't ...
3
votes
4answers
225 views

Can GPL licensed code be close sourced later by the author? [duplicate]

Suppose someone writes some code, and publishes it as open source under the GPL. Later they decide to close source their application and put it for sale. Is that in violation of the GPL? All code in ...
0
votes
1answer
90 views

Software previously licensed under GPL now APL2, can I use it in a commercial application?

A software I would like to use in a commercial project switched from GPL to APL2. The news cites: Please note that the new code that is currently developed as part of the 2.0 code base is licensed ...
1
vote
2answers
42 views

Sell dual licensed software with 3rd party contributions [closed]

I host a project on GitHub. Right now it has a custom license (shareware) but I'm going to move to a dual license AGPLv3 + commercial license. I would like to have some information about the ...
1
vote
2answers
70 views

GPLv3 + commercial license on the same project? [duplicate]

I'm trying to find a solution to publish my source as open source just for personal and no-profit use, and sell licenses for commercial use. I see Packery which uses GPLv3 for non commercial, and a ...
2
votes
1answer
50 views

Releasing libraries used in a commercial application as GPL [duplicate]

While I was at university I developed some PHP libraries which I intended for personal use. I used them in a few personal projects. When I joined my current job we created a commercial product which ...
4
votes
3answers
3k views

What “sublicense” actually means?

First, it is clear that the right to sublicense doesn't give you the right to relicense. Let's say we have a library with MIT license(1 file), someone adds some features to the library but puts them ...
1
vote
2answers
56 views

GPL and code producing software

I want to make an online management tool for a server software using GPL licensed software. For the tool I'm fine releasing all software to anyone how wants it. After all, it's not rocket science. ...
1
vote
1answer
136 views

Using GPL’d software in a proprietary web application

We are developing website that we charge money from members to join it as membership annual cost, so, we decided to put a plan for the second stage so we are choosing now the load balancer that we ...
1
vote
1answer
200 views

Including GPLv2 code in GPLv3 code

I would like to use some code that was released under GPLv2 in my project. I released my project with the GPLv3 license. Can I do this, or do I have to downgrade to GPLv2?
2
votes
3answers
96 views

GPL covers the linguistic data in *spell dictionaries?

There are good annotated vocabulary in {a,i,my}spell dictionaries, giving the lexical class et all. I'm writing a program that needs a large vocabulary, but with a reduced scope, so I don't need all ...
3
votes
1answer
206 views

Is it OK to use the MIT license for a project that uses Qt?

I built a Qt application. Am I allowed to LICENSE it under the MIT license? Qt is a cross-platform application and UI framework for developers using C++ or QML, a CSS & JavaScript like ...
-2
votes
2answers
29 views

Licensing subcomponents

Say I produce system X, which contains some components (A, B and C, say) which are specific to X, but ripe for generalisation. Let's say X is licensed with a viral open source license ([AL]?GPL). If ...
6
votes
3answers
709 views

Does using GCC specific builtins qualify as incorporation within a project?

I understand that linking to a program licensed under the GPL requires that you release the source of your program under the GPL as well, while the LGPL does not require this. The terminology of the ...
2
votes
3answers
123 views

How do I deal with imported modules in GPL?

I wish to release a non-commercial python application under GPL3 in both source and (PyInstaller) executable form. I'm struggling to find a consistent answer to the problem of imported modules. Can I ...
5
votes
2answers
318 views

Does distributing non-GPLd assets with a GPL application violate the license?

This is somewhat related to my other question, but is actually different. I would like to license a Windows Phone application under the GPL. All other Windows Phone Marketplace issues aside (I'll ask ...
4
votes
2answers
294 views

can a closed source commercial software make system(3) calls to GPL applications (not libraries)?

The closed source commercial software (CSCS), will just make system(3) calls to GPL applications. The user machine will run CSCS and it will call these GPL applications, in realtime, in the very same ...
0
votes
2answers
121 views

Porting an algorithm implementation licensed under GNU GPL v3

I'm working on a JavaScript port of a red-black tree implementation in Java from the book Algorithms 4th Edition, by Sedgewick and Wayne. I believe that my JavaScript port qualifies as a derivative ...
9
votes
2answers
798 views

How can a company sell licenses for GPLed software without violating rights of others [duplicate]

There are tons of questions like "Can I use GPLed code X in my commercial project?" but I found nothing which answers my question. I take ExtJS as an example, but actually you can any commercial / ...
1
vote
1answer
41 views

The term “aggregate” in GPL3

What does this part of GPL3 mean in simpler or more readable terms? If I decide to enhance a GPL3 Program in which some snippets of the codes I could add are generic (may it be on a separate file or ...
1
vote
2answers
76 views

GPL license for software and online service comparison

I have two questions that are linked : 1) Can someone sell a fork of an open-source software under GPL without distributing the source? Example: Can I modify a little bit GIMP, repackage it under ...
38
votes
14answers
4k views

What do I need to do to NOT steal “Hello World” code with a GPL license?

In the project, I found a file, math.c, with a big GPL header and ... //------------------------------------------------------------------------------ /// Returns the minimum value between two ...
1
vote
1answer
65 views

Open-source licenses and modifications

I see in the GPL license FAQ : Does the GPL require that source code of modified versions be posted to the public? (#GPLRequireSourcePostedPublic) The GPL does not require you to release ...
3
votes
2answers
385 views

Dalvik + Java licensing question

This is a licensing question about the Dalvik and J2SE core libraries. In particular the license governing java.util.concurrent.SynchronousQueue. The license header of the class in the JDK source ...
5
votes
4answers
1k views

Does one line of GPLed code make program a “derived work”?

I've recently run into some argument with a person that claims to be a lawyer (I have my suspicions about this not being completely true, though). As far as I know, copying even one line of code from ...
-2
votes
1answer
110 views

What rights do I have if a closed source non-distributed in-home application was stolen? [closed]

I was always wondering about this, because I have been recently reading about many leaks and stolen programs on certain news sites: If a program (running on a server for example, serving http ...
0
votes
3answers
128 views

GPL Copyright notice in fork of dual licenced software when copyright of original has been sold subsequently

Since 2009 we are developing a fork of a CMS that was started in 1999 as commercial project, but released 2009 additionally under GPL. The original programmer sold copyright, code, name and website in ...
0
votes
1answer
54 views

ClamAV Database Usage Policy? [closed]

What about if I sell computers with embedded home-made antivirus using ClamAV database as its main database or as optional database? Of course the software isn't open-source/GPL. Is it allowed? Many ...