>Binary compatibility is a problem.  Every writer of utmp/wtmp would need
>to be updated at the same time (including any packages - ssh-type and
>xterm-type packages come to mind) other file corruption will be a real
>issue.
>Doesn't the Solaris utmpx use a daemon for updates to the file, or am I
>misremembering?  For someone who hasn't really looked at what they did,
>what is wrong with their solution to this problem?

	I don't believe there's a daemon for utmp->utmpx conversion, from
	Solaris 2.8 manpage for utmp(4).  i shouldn't paste the content here,
	so please go see it yourself.  i understand your point, about issues
	with old binaries that can potentially damage (new-format)
	/var/log/utmp.

itojun