FreeBSD は STABLE だったら freebsd-update 失敗するので UNAME_rをすげかえてやるみたい

[root@freebsd] # freebsd-update upgrade -r 10.3

Looking up update.FreeBSD.org mirrors... 4 mirrors found.
Fetching metadata signature for 10.2-STABLE from update4.freebsd.org... failed.
Fetching metadata signature for 10.2-STABLE from update5.freebsd.org... failed.
Fetching metadata signature for 10.2-STABLE from update6.freebsd.org... failed.
Fetching metadata signature for 10.2-STABLE from update3.freebsd.org... failed.
No mirrors remaining, giving up.
[root@freebsd] # export UNAME_r="10.2-RELEASE"
[root@freebsd] # freebsd-update upgrade -r 10.3
Looking up update.FreeBSD.org mirrors... 4 mirrors found.
Fetching metadata signature for 10.2-RELEASE from update6.freebsd.org... done.
Fetching metadata index... done.
Fetching 2 metadata patches.. done.
Applying metadata patches... done.
Inspecting system... done.

The following components of FreeBSD seem to be installed:
kernel/generic src/src world/base world/doc world/games world/lib32

The following components of FreeBSD do not seem to be installed:

Does this look reasonable (y/n)? y

Fetching metadata signature for 10.3-RELEASE from update6.freebsd.org... done.
Fetching metadata index... done.
Fetching 1 metadata patches. done.
Applying metadata patches... done.
Fetching 1 metadata files... done.