10-21-2008, 04:50 PM
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Industry Role:
Join Date: Apr 2007
Location: NY
Posts: 13,724
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Quote:
Originally Posted by crockett
Not that I'm a cheap ass, but I never figured out how these companies get away with selling plug-ins or modules for WP. Isn't it against the GPL license to "only" offer it for sale with out also releasing it free for download?...
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curious about where this one falls too
here is the link to the section in the GPL faq that discusses this:
http://www.gnu.org/licenses/gpl-faq.html#GPLAndPlugins
"If a program released under the GPL uses plug-ins, what are the requirements for the licenses of a plug-in?
It depends on how the program invokes its plug-ins. If the program uses fork and exec to invoke plug-ins, then the plug-ins are separate programs, so the license for the main program makes no requirements for them.
If the program dynamically links plug-ins, and they make function calls to each other and share data structures, we believe they form a single program, which must be treated as an extension of both the main program and the plug-ins. This means the plug-ins must be released under the GPL or a GPL-compatible free software license, and that the terms of the GPL must be followed when those plug-ins are distributed.
If the program dynamically links plug-ins, but the communication between them is limited to invoking the ?main? function of the plug-in with some options and waiting for it to return, that is a borderline case."
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