tweak example udhcp script

examples/udhcp/simple.script

@@ -1,10 +1,10 @@
 #!/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 "$1" ] || echo "Error: should be called from udhcpc" && exit 1
+
 NETMASK=""
 [ -n "$subnet" ] && NETMASK="netmask $subnet"
 BROADCAST="broadcast +"
@@ -35,10 +35,10 @@ case "$1" in
 
 		echo "Recreating $RESOLV_CONF"
 		echo -n > $RESOLV_CONF-$$
-		[ -n "$domain" ] && echo search $domain >> $RESOLV_CONF-$$
+		[ -n "$domain" ] && echo "search $domain" >> $RESOLV_CONF-$$
 		for i in $dns ; do
 			echo " Adding DNS server $i"
-			echo nameserver $i >> $RESOLV_CONF-$$
+			echo "nameserver $i" >> $RESOLV_CONF-$$
 		done
 		mv $RESOLV_CONF-$$ $RESOLV_CONF
 		;;