uuidgen(2)

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

The man page for the uuidgen(2) system call states that generated UUIDs
conform to the DCE version 1 variant which is based on the time they
were created.

The kernel actually generates version 4 UUIDs which are generated
randomly.

Found by wiz@ because the python test suite fails if you build python37
to use our uuid functions in libc instead of linking against the
devel/libuuid package. The test that fails is just a check of the UUID
version number.