| | From what I know about SCO, and they have a litigious history. Formerly named Caldera, they acquired DR-DOS from Novell (who had purchased it from Digital Research), then sued Microsoft for claiming that Windows could only run on top of MS-DOS. Microsoft eventually settled with Caldera to make them go away.
Caldera used to sell their own version of Linux. I took the second Linux Admin class that they offered (here's a cheesy review: http://www.linuxjournal.com/article.php?sid=3259) . During the class I asked a rather frank question: how could Caldera make money on a free operating system? A company rep admitted that most of their revenue came from sales of shrink-wrapped CDs. I wondered at the time how such a profit model could survive, because one only buys a copy of a free operating system if it is cheaper than downloading it from the internet. As bandwidth costs dropped and availability increased, this profit model evaporated. Caldera obviously came up with a new profit model: buying SCO to get its intellectual property, then selling Unix licenses to unsuspecting Linux users.
A Finnish graduate student, Linus Torvalds, created a free version of Unix, now called Linux, by cloning most of the functionality of proprietary Unix systems. He did not borrow Unix code to do it. This is exactly the same thing that Bill Gates did when he duplicated the functionality of the CP/M operating system to produce MS-DOS, except that Gates went on to market MS-DOS as a commercial product, while Torvalds simply released his code to the programming community. SCO claims that Linux contains 100,000 (the exact number is a trifle vague) lines of proprietary code. When asked about SCO's claim, Torvalds said, "They are smoking crack." I tend to agree. The Linux kernel has been so heavily scrutinized by so many people that massive intellectual property theft just doesn't seem possible. Major Linux vendors like Red Hat also think the SCO claims are spurious, and have begun offering their users full indemnity against future legal challenges.
On the other hand, the Linux camp may argue about the constraints that GPL places on software development and transfer, but no one seems to cite court cases to back it up. Below is a link to the only pending legal challenge, that I am aware of, which tests the legality of the GPL:
http://library.lp.findlaw.com/articles/file/00050/008924/title/Subject/topic/Intellectual%20Property%20Law_Licensing/filename/intellectualpropertylaw_1_239
The problem seems to be that many legal scholars consider the GPL unenforceable. Here is a quote from Robert Merges of the Berkeley Law School:
"By its own terms, the copyleft agreement is an unusual license; at the most basic level consider the problem of determining damages when the licensee frustrates the licensor's expectation of zero profits under the contract," writes Merges. "But what is most significant about the agreement is that it purports to restrict subsequent transferees who receive software from a licensee, presumably even if the licensee fails to attach a copy of the agreement. As this new transferee is not in privity with the original copyleft licensor, the stipulation seems unenforceable."
(see full article at http://www.linuxplanet.com/linuxplanet/reports/2000/1/)
The problem I have with opensource code and the GPL is that proponents see it as a new religion. Programming to them is a holy war, and one often hears them say that all software should be free. Excuse me? As someone who started programming on punch cards, I recall the days when all software was free and "open-source" because there was no way to protect the code. Many end users wrote their own software and traded it freely long before Linux strolled in using the GPL to mandate the same thing. Early programmers released source code, but often inserted a line in the code reserving copyright to the author. This still makes more sense to me than the GPL, because copyright law protects the author from mass copying and profiteering, while still permitting limited copying for non-commercial use. And while copyrights eventually lapse, I'm not aware of any time limits built into the GPL.
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