# purpose of 20-check-boot-options.sh is to find out if at boot time # we entered special boot options, such as: # dhcp to force DHCLIENT to be started instead of the network scripts # ip=10.10.10.10 was defined to force an IPADDR of our choice instead # of the original IP address of the source system (useful for cloning purposes) # nm=255.255.255.0 to set the netmask (may be skipped) read -r </proc/cmdline echo $REPLY | grep -q dhcp && USE_DHCLIENT=y echo $REPLY | grep -q "ip=" if [ $? -eq 0 ]; then IPADDR=${REPLY#*ip=} IPADDR=${IPADDR%% *} echo "IP address will be overruled by kernel option ip=$IPADDR" fi echo $REPLY | grep -q "nm=" if [ $? -eq 0 ]; then NETMASK=${REPLY#*nm=} NETMASK=${NETMASK%% *} fi echo $REPLY | grep -q "gw=" if [ $? -eq 0 ]; then GATEWAY=${REPLY#*gw=} GATEWAY=${GATEWAY%% *} fi echo $REPLY | grep -q "netdev=" if [ $? -eq 0 ]; then NETDEV=${REPLY#*netdev=} NETDEV=${NETDEV%% *} fi