On Thu, Feb 16, 2006 at 10:49:39AM +0000, Alec Berryman wrote:
> Bernd Schoeller on 2006-02-16 10:22:00 +0100:
>
> > If I use supersede (in dhclient.conf) or dhclient.conf.tail, this work
> > fine, but the information gathered by dhclient is lost.
>
> You want 'prepend'.
Nope, also prepend messes with my existing resolv.conf file, instead
of storing the received DNS information in a new file.
Just for the logs, and as I have found no 'easy/predefined' way of
doing it, I have created a copy of /sbin/dhclient-script to
/sbin/dhclient-script.pdnsd and changed the following function:
----------------------------------------------------------------------
add_new_resolv_conf() {
# XXX Old code did not create/update resolv.conf unless both
# $new_domain_name and $new_domain_name_servers were provided. PR
# #3135 reported some ISPs only provide $new_domain_name_servers and
# thus broke the script. This code creates the resolv.conf if either
# are provided.
RESOLV_CONF_NAME=/etc/resolv.conf.wan
rm -f /etc/resolv.conf.std
if [ -n "$new_domain_name" ]; then
echo "search $new_domain_name" >>/etc/resolv.conf.std
fi
if [ -n "$new_domain_name_servers" ]; then
for nameserver in $new_domain_name_servers; do
echo "nameserver $nameserver" >>/etc/resolv.conf.std
done
fi
if [ -f /etc/resolv.conf.std ]; then
if [ -f /etc/resolv.conf.tail ]; then
cat /etc/resolv.conf.tail >>/etc/resolv.conf.std
fi
# In case (e.g. during OpenBSD installs) /etc/resolv.conf
# is a symbolic link, take care to preserve the link and write
# the new data in the correct location.
if [ -f $RESOLV_CONF_NAME ]; then
cat $RESOLV_CONF_NAME > /etc/resolv.conf.save
fi
cat /etc/resolv.conf.std > $RESOLV_CONF_NAME
rm -f /etc/resolv.conf.std
# Try to ensure correct ownership and permissions.
chown -RL root:wheel $RESOLV_CONF_NAME
chmod -RL 644 $RESOLV_CONF_NAME
return 0
fi
return 1
}
----------------------------------------------------------------------
This will store the DNS resolv.conf configuration in
/etc/resolv.conf.wan and won't mess the preinstalled resolv.conf
file.
In dhclient.conf, I have added the following entry:
script "/sbin/dhclient-script.pdnsd";
The server section in pdnsd.conf now looks like the following:
server {
label= "dialup";
file = "/etc/resolv.conf.wan";
proxy_only=on;
timeout=4;
uptest=if;
interface = sis0;
interval=10;
purge_cache=off;
preset=off;
}
Thanks for the hints,
Bernd
