[oe] [RFC][PATCH] netbase: don't start udhcpc if kernel assigned IP statically

[Phil Blundell]

On Mon, 2009-09-21 at 18:39 -0400, Denys Dmytriyenko wrote:
> On Mon, Sep 21, 2009 at 08:45:06PM +0100, Phil Blundell wrote:
> > It seems like there must be a better way of solving this problem.  How
> > about just teaching "ifup -a" to spot interfaces that are already up and
> > leave them alone?
> 
> Won't work for the case of kernel-acquired DHCP address, i.e. kernel level 
> autoconfig, aka IP_PNP, aka ip=dhcp command line.

True, but your original patch won't help with this situation either
(since "ip=dhcp" won't match the regex).  I think this is a different
problem and probably requires a different solution: the ideal thing
would be for the kernel to set a flag on the interface to say that it
needs to be taken over by a DHCP client, or alternatively to invoke the
DHCP client itself via the hotplug mechanism.  Failing that you could
arrange for the startup scripts to poke around at /proc/cmdline and try
to second-guess what the kernel has done, although that would be rather
less satisfactory.

p.