"These system call implementations had to be quite compatible with the behavior of the real Linux kernel, otherwise Linux applications would not work on SCO Unix. It is quite obvious to argue that in order to get these right, Linux kernel code had to be studied and possibly copied into the SCO Unix kernel to implement the Linux Kernel Personality. "How else would you get the Java Hotspot VM or the X-window server (Linux binaries) to work on SCO Unix?" the source questioned.Stowell also confirmed that SCO this week began shipping its UnixWare 7.1.2 and UnixWare 7.1.3 media kits after recently suspending these as they contained a Caldera OpenLinux 3.1.1 CD that provided LKP capabilities. The move follows SCOs earlier decision to suspend shipments of its SCO Linux 4.0 and Caldera Open Linux 3.1.1 products due to intellectual property (IP) issues associated with the Linux operating system.
But Blake Stowell, a spokesman for SCO, told eWEEK on Tuesday that while the LKP used some open-source components, this did not constitute open sourcing that product. "That is a false notion. SCO also never used any of the Linux kernel code in the LKP and thus has not violated the GPL. We have also never contributed Unix source code to the Linux kernel," he said.