[libvirt] dmidecode dependency

[Jason Helfman]

Hello All,

I was wondering if it may be possible to call sysctl, instead of requiring
dmidecode to be installed for getting the uuid of a system?

According to the user that filed the bug below, dmidecode needs to be
installed to get the uuid, or errors will  be printed in logs to get the
uuid.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=196733

I was wondering if sysctl can be called to get this information for
FreeBSD? I am not sure if Linux would give similar information, but would
think it might. Beyond this, I am not sure if dmidecode is used for other
aspects beyond uuid where it is required where sysctl doesn't give the
information needed.

$ sudo dmidecode |grep -i uuid
        UUID: 42355DE8-C55C-E487-8E16-509A78EB5EE1
$ sysctl kern.hostuuid
kern.hostuuid: 42355de8-c55c-e487-8e16-509a78eb5ee1

Thanks,
Jason

-- 
Jason Helfman          | FreeBSD Committer
jgh at FreeBSD.org     | http://people.freebsd.org/~jgh  | The Power to Serve
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