This project is certainly covered under the Ancient UNIX licences. "Later, in January 2002, Caldera International (now SCO Group) relicensed (but has not made

This project is certainly covered under the Ancient UNIX licences. "Later, in January 2002, Caldera International (now SCO Group) relicensed (but has not made available) several versions under the four-clause BSD license." https://en.wikipedia.org/wiki/Ancient_UNIX https://en.wikipedia.org/wiki/Ancient_UNIX Nobody is going after a v7 Unix port, the sources for ancient Unix are widely distributed on TUHS (The Unix Heritage Society, tuhs.org) and such.