lib/mkiso/udhcpc-script

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#!/bin/busybox sh
# Busybox udhcpc hook for the live image. dhcpcd is preferred; this is
# the slim-disc fallback so a lease still writes nameservers.

resolv=/etc/resolv.conf

case $1 in
	deconfig)
		if command -v ip >/dev/null 2>&1; then
			ip addr flush dev "$interface" 2>/dev/null || :
			ip link set "$interface" up 2>/dev/null || :
		fi
		;;
	bound|renew)
		if command -v ip >/dev/null 2>&1; then
			ip link set "$interface" up 2>/dev/null || :
			ip addr flush dev "$interface" 2>/dev/null || :
			if [ -n "$ip" ]; then
				if [ -n "$mask" ]; then
					ip addr add "$ip/$mask" \
						${broadcast:+broadcast $broadcast} \
						dev "$interface" 2>/dev/null || :
				else
					ip addr add "$ip" \
						${broadcast:+broadcast $broadcast} \
						dev "$interface" 2>/dev/null || :
				fi
			fi
			if [ -n "$router" ]; then
				for gw in $router; do
					ip route replace default via "$gw" \
						dev "$interface" 2>/dev/null || :
					break
				done
			fi
		fi
		if [ -n "$dns" ]; then
			: >"$resolv"
			[ -n "$domain" ] && printf 'search %s\n' "$domain" >>"$resolv"
			for ns in $dns; do
				printf 'nameserver %s\n' "$ns" >>"$resolv"
			done
		fi
		;;
esac
exit 0