and ISO/IEC-9834-8:2005 is with LOWER-CASE hexadecimal characters only,
so translate the (usually upper-case and this way not conforming)
representation of the BIOS UUID when reading it. Also be more strict
about the valid characters in the textual representation by checking for
just the hexadecimal characters.
software-generated UUID. Store the result in /etc/hostid and use it in
the future. Perform simple UUID format check, as there is a lot of
hardware with broken UUIDs. The check should be improved to also eliminate
fake UUIDs like 00000000-0000-0000-0000-000000000000.
Requested by: many
UUID and stores it in /etc/hostid ($hostid_file) as well as sets kern.hostuuid
and kern.hostid sysctls on every boot.
Hostid can be reset using '/etc/rc.d/hostid reset' command.
Hostid generation and setting can be turned off by setting variable
hostid_enable to "NO" in /etc/rc.conf.
Reviewed by: mlaier, rink, brooks, rwatson
