busybox: move udhcp script from skeleton to package

Since udhcpc is part of busybox, it seems logical to move the udhcpc
script from skeleton to busybox.

[Peter: only install if not available in skeleton]
Signed-off-by: Lionel Landwerlin <llandwerlin@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/busybox/busybox.mk

@@ -141,7 +141,10 @@ endif
 
 define BUSYBOX_INSTALL_TARGET_CMDS
 	$(BUSYBOX_INSTALL_BINARY)
-	-chmod a+rx $(TARGET_DIR)/usr/share/udhcpc/default.script
+	if [ ! -f $(TARGET_DIR)/usr/share/udhcpc/default.script ]; then \
+		$(INSTALL) -m 0755 -D package/busybox/udhcpc.script \
+			$(TARGET_DIR)/usr/share/udhcpc/default.script; \
+	fi
 endef
 
 define BUSYBOX_UNINSTALL_TARGET_CMDS

package/busybox/udhcpc.script

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# udhcpc script edited by Tim Riker <Tim@Rikers.org>
+
+[ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1
+
+RESOLV_CONF="/etc/resolv.conf"
+[ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
+[ -n "$subnet" ] && NETMASK="netmask $subnet"
+
+case "$1" in
+	deconfig)
+		/sbin/ifconfig $interface 0.0.0.0
+		;;
+
+	renew|bound)
+		/sbin/ifconfig $interface $ip $BROADCAST $NETMASK
+
+		if [ -n "$router" ] ; then
+			echo "deleting routers"
+			while route del default gw 0.0.0.0 dev $interface ; do
+				:
+			done
+
+			for i in $router ; do
+				route add default gw $i dev $interface
+			done
+		fi
+
+		echo -n > $RESOLV_CONF
+		[ -n "$domain" ] && echo search $domain >> $RESOLV_CONF
+		for i in $dns ; do
+			echo adding dns $i
+			echo nameserver $i >> $RESOLV_CONF
+		done
+		;;
+esac
+
+exit 0