dhclient SYNCDHCP messiness

[Ian Lepore]

On Wed, 2012-02-22 at 11:40 -0700, Warren Block wrote:
> In /etc/rc.conf:
> 
>    ifconfig_em0="SYNCDHCP"
> 
> dhclient runs on startup, then later tries to run again:
> 
>    Starting dhclient.
>    em0: no link ...
>    .
>    .
>    got link
>    (...)
>    Starting Network: lo0 em0.
>    (...)
>    Starting devd.
>    Starting ums0 moused
>    .
>    dhclient already running? (pid=344).
>    Creating and/or trimming log files
> 
> So is this from /etc/network.subr starting dhclient because the 
> interface is set to DHCP, then /etc/rc.d/dhclient running directly 
> later?
> 
> This is with
> 
> FreeBSD lightning 8.3-PRERELEASE FreeBSD 8.3-PRERELEASE #0: Tue Feb 21 22:25:30 MST 2012 
> root at lightning:/usr/obj/usr/src/sys/LIGHTNING  i386
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>From the sequence of things there it looks like the second invocation
may be from a devd rule, but I thought all the standard rules used
"dhclient quietstart" and that one of the effects of that was to supress
the "already running" warning.  

I updated a couple systems to 8.3-{PRERELEASE,BETA1} over the past few
days and I haven't seen such a glitch.  I don't think it should make a
difference, but I use synchronous_dhclient=YES and ifconfig_foo=DHCP

-- Ian