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During the SCO Forum 2003, The SCO Group (SCO) showed several examples of allegedly illegal copying of copyrighted code into Linux. The open source community quickly debunked most of the examples shown. In particular, one example showed that code from Unix was indeed used in some of SGI's Linux contributions. The Linux maintainers stated that the code in question had in fact already been removed from Linux before the example had been revealed — not because it was infringing, but because the code in question had needlessly duplicated some functions which were already present in Linux. SGI and other analysts also responded to this matter and confirmed that the code in question had never infringed at all. ==Background== During the SCO Forum, held on August 17 – 19, 2003, SCO publicly showed several alleged examples of illegal copying of copyright code in Linux. Until that time, these examples had only been available to people who signed an NDA, which had prohibited them from revealing the information shown to them. SCO claimed the infringements are divided into four separate categories: literal copying, obfuscation, derivative works and non-literal transfers. The example used by SCO to demonstrate literal copying is also known as the ''atemalloc'' example. While the name of original contributor was not revealed by SCO, quick analysis of the code in question pointed to SGI. At this time it was also revealed that the code had already been removed from the Linux kernel, because it duplicated already existing functions. Within hours, the open source community started several different analyses of the infringing code. While the results of these analyses differ slightly, they all confirm that the code in question was derived from Unix code. These analyses also pointed out that while the code could possibly have originated in Unix, this does not necessarily prove infringement of copyrights. The community determined that this was a particularly bad example, because the code in question had never been used in the mainstream distributions of Linux, and had been present only in the IA-64 version. The relative sparseness of worldwide IA-64 installations, combined with the limited time in which the code was present in Linux, makes the chance of actually encountering a system running this code very slim. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SCO and SGI」の詳細全文を読む スポンサード リンク
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