On Tue, Oct 28, 2003 at 12:01:54PM +0100, Gr=E9goire Sutre wrote:
> Hi,
>=20
> I expected that stopping dhclient would restore the saved /etc/resolv.c=
onf=20
> (named /etc/resolv.conf.save), however this is not the case on my NetBS=
D=20
> 1.6.1_STABLE (i386) box.
>=20
> It seems that /sbin/dhclient-script is designed to restore /etc/resolv.=
conf,=20
> when called with $reason =3D STOP.
>=20
> However, when I stop dhclient (with /etc/rc.d/dhclient stop), dhclient-=
script
> is not called and hence can not do its job.

After some experiments, it turns out that the -r flag allows to "cleanly"
shutdown dhclient. The man page says:

   The  client  normally  doesn't  release  the current lease as it is no=
t
   required by the DHCP protocol.  Some cable ISPs require  their  client=
s
   to  notify  the  server if they wish to release an assigned IP address=
.
   The -r flag explicitly releases the current lease, and once  the  leas=
e
   has been released, the client exits.

In particular, dhclient -r calls dhclient-script which (among other thing=
s)
restores the saved /etc/resolv.conf.

So I intend to add the following line in /etc/rc.d/dhclient:

stop_cmd=3D"$command -r"

where $command is previously set to /sbin/dhclient (in /etc/rc.d/dhclient=
).

As I'm new to NetBSD, I would appreciate if an experienced user could con=
firm
that I won't introduce problems with this "fix".

Many thanks,

Gregoire.