I'm interested in guidance here based on actual knowledge/experience, rather than just peoples' opinions.<p>Here's the story:<p>I am the author and copyright holder of some GPL software. Even though I don't think I'm losing money because of the violation, I feel a duty to stand up for the GPL, so I do want to follow through. I don't see instructions on how to do that here:
http://www.gnu.org/licenses/gpl-violation.html<p>My GPL software's home page is here:
http://ifdefined.com/bugtrackernet.html
And a demo here:
http://ifdefined.com/btnet/bugs.aspx<p>The company that I believe is violating my license is here:
http://ibn-distribution.de/sbhd/<p>I have zero doubt that their software uses my codebase, but I'm not 100% sure that they are failing to open their source, as mandated by GPL. So, I contacted them directly using two different email addresses I found on their site, but I have not heard back. I wrote that I want to work with them to make sure they comply with GPL <i>OR</i> work with them to license my software under different terms. I don't care which, but as I said, I feel it as a duty to follow up.<p>What should I do next?
I believe a similar question was asked on Slashdot a while back. Someone had some GPLv2 code that another company was selling. The general response was that it was completely legal, because the company only had to disclose the source code to people who bought the product. Source had to be made available, but it's not so strict as to "publicly available."<p>I'm not a lawyer so I'd go with one of the links posted for software legal advice.
The first step is to understand the terms under which you offered your code. Unless you have purchased the software from them and requested the code and they failed to make it available to you, or they have publicly made available their software and you've requested the code and they failed to make it available to you, and you've given them reasonable time to reply to these requests, there's no evidence of breach of the license yet.
Have you asked them for a copy of the source?<p>They are only obligated to give out the source if someone asks (if it's not available with purchase/download).
I suggest asking for advice from the Software Freedom Law Center: <a href="http://www.softwarefreedom.org/" rel="nofollow">http://www.softwarefreedom.org/</a> They specialize in this kind of thing.<p>As a point of ... trivia? ... Eben Moglen, the attorney that created the GPL along with Richard Stallman, directs and is a founder of SFLC.
Call the company via phone. Most Germans speak English, so that should work.<p>You might want to take a look at
<a href="http://gpl-violations.org/" rel="nofollow">http://gpl-violations.org/</a>
the guy who runs it is also a German.