The fur is flying between The SCO Group and online legal Web site Groklaw with both sides making public key SCO internal communications dating back several years. The messages throw more light on SCO's ongoing litigation, which alleges that the Linux open-source operating system contains elements of its intellectual property.
On Thursday, Groklaw published an email dating back to August 13, 2002, from SCO senior vice president Reg Broughton to SCO's CEO, Darl McBride, which included a message from SCO engineer Michael Davidson to Broughton titled "Re: Patents and IP Investigation".
In his email, Davidson describes a previous SCO investigation headed by outside consultant Bob Swartz to determine whether any Linux companies had used copied pieces of SCO's Unix source code. He concluded: "At the end, we had found absolutely *nothing*. ie no evidence of any copyright infringement whatsoever".
The investigation came about as "a result of SCO's executive management refusing to believe that it was possible for Linux and much of the GNU software to have come into existence without *someone* *somewhere* having copied pieces of proprietary Unix source code to which SCO owned the copyright," Davidson wrote in the email. "The hope was that we would find a 'smoking gun' somewhere in [the] code that was being used by Red Hat and/or the other Linux companies that would give us some leverage."
SCO countered with a statement and a memo from October 4, 1999, to senior vice president Steve Sabbath from Swartz. Doug Michels, SCO CEO and president at the time, was copied on the message.
"This memo shows that Mr Davidson's email is referring to an investigation limited to literal copying, which is not the standard for copyright violations," SCO said in its statement. "Even more importantly, this memo shows that there *are* problems with Linux. It also notes that additional investigation is required to locate all of the problems, which SCO has been continuing in discovery in the IBM and Autozone cases." The company added using Davidson's email to suggest SCO's internal investigation revealed no problems would be "inaccurate and misleading".
In Swartz's memo, he talks of trying to determine whether there is "any material from Unix in the Red Hat Linux release 5.2" and buying a copy of Red Hat from Best Buy and comparing it against multiple copies of Unix including SCO's OpenServer 5.0. He notes: "We found two kinds of copying, the first where there were a number of lines that were identical, on a character by character basis, and those where the code was different, but where the code or its structure were substantially similar." He concludes that such similarities are "clearly disturbing", adding: "It is also clear that in certain instances whoever wrote the code started with Unix source and modified it. Thus there can [be] no doubt that parts of the Linux distribution were derived from Unix."
SCO and Groklaw are old adversaries, with the online legal site providing coverage that is often highly critical of every stage of the software vendor's litigation. At one time, SCO even planned to set up a website to counter Groklaw's coverage and tell its own side of its legal battles, but the company ultimately decided to do that within the www.sco.com site, according to Blake Stowell, a SCO spokesman.