rootfs: redirect output from udhcpc to kernel log

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

userspace/rootfs_override/etc/init.d/network

@@ -91,5 +91,7 @@ fi
 
 # Try to get IP via dhcp if failed run dhcp client forever in background.
 # If no information how to get IP address is available use this option.
-echo "Using DHCP to get IP"
-udhcpc -b -i eth0 $DHCP_OPT_EXTRA
+echo "Using DHCP to get IP" | tee $log_output
+# redirect output from udhcpc into syslog and output about the first lease to
+# the kernel log (syslog is not started at this point)
+udhcpc -S -b -i eth0 $DHCP_OPT_EXTRA | tee $log_output

userspace/rootfs_override/wr/bin/dhcp_extra_opt.sh

@@ -7,6 +7,10 @@
 # udhcpc should get hostname the from DHCP server.
 #
 # check whether we got hostname from DHCP server
+log_output=/dev/kmsg
+
+exec 1>$log_output
+
 if [ -n "$hostname" ]; then
     /bin/hostname "$hostname"
     echo "$hostname" > /etc/hostname