Re: r239356: does it mean, that synchronous dhcp and dhcplcinet with disabled devd gone?

On Aug 21, 2012, at 5:00 PM, Slawa Olhovchenkov wrote:

> On Wed, Aug 22, 2012 at 02:36:23AM +0400, Lev Serebryakov wrote:
> 
>> Hello, Ian.
>> You wrote 22 августа 2012 г., 1:38:04:
>> 
>> IL> For example, this script can replace devd as a daemon that restarts
>> IL> dhclient when any link comes back up...
>> 
>> IL> Of course the right thing to do is invoke the proper rc scripts rather
>> IL> than dhclient directly... this is just to illustrate how easy it is to
>> IL> replace devd if your needs are specialized.
>>  [sigh]
>>  Everything worked with 8.x without problems. It worked with 9.x and -CURRENT
>> with adding of ``synchronous_dhclient="YES"'' into /etc/rc.conf (And
>> it cost me about 2 hours of investigation, why dhclient stops to
>> start after upgrade). Next I'll need to write some script. Is it Ok
>> to you?
>> 
>>  Yes, I understand problem with laptops, which change wire and
>> wireless networks and need to re-acquire new address. But it should
>> be soleved other way. And jhb_at_ already posted proper solution, BTW!
>> 
>>  And, as side note, ``man rc.cof'' says NOTHING about relation of devd
>> and ``synchronous_dhclient'' setting! It says about ``start
>> dhclient(8) synchronously at startup'' without explaining, that
>> without this option and with devd disabled, dhclient WILL NOT START
>> AT ALL! And relations between devd and dhclient are not documented at
>> all in: rc.conf(5), dhclient(8), devd.conf(5) and devd(8).
> 
> Time ago synchronous_dhclient is waiting for obtain IP by dhcpclient.
> w/o synchronous_dhclient and ifconfig_bge0="DHCP" dhcpclient run in
> background and don't paused boot while obtaining IP address.
> On perinterface basis: ifconfig_bge0="SYNCDHCP" or ifconfig_bge0="NOSYNCDHCP"
> 
> Background start of dhcpclient currently by devd, on UP event on
> ethernet interface. This introduction in 6.2. 2006-08-22.

This is why monkeying with default behavior and not documenting changes are both bad ideas.

Warner