rearrange code to remove redundancies

gophed

@@ -36,10 +36,10 @@ fi
 
 if [ "$1" = "-h" ]; then usage; fi
 
-if [ "$1" = "-i" ]; then 
+if [ "$0" = "gophed" -a "$1" = "-i" ]; then 
-	ln -s $0 g
+	ln -sf $0 g
-	ln -s $0 d
+	ln -sf $0 d
-	ln -s $0 v
+	ln -sf $0 v
 	exit 0
 fi
 
@@ -50,26 +50,33 @@ if [ "${script_name}" = "gophed" -o "${script_name}" = "v" ]; then
 	TMPFILE=$(mktemp /tmp/gophed_$2_${sel}_$3.XXXXXXXXXXXXXXXXXXX)
 	go "$1" "$2" "$3" > $TMPFILE
 	cat $SHOW - | ed -p ${PROMPT} $TMPFILE 
+	cleanup
+	exit 0
 fi
-if [ "${script_name}"  = "g" ]; then 
+
+if [ ${script_name} = "g" -o ${script_name} = "d" ]; then 
 	LINE=$(awk "{if (NR == $2) print \$0;}" $1)
 	RESOURCE=$(echo "$LINE" | cut -d '	' -f 2)
 	HOST=$(echo "$LINE" | cut -d '	' -f 3)
 	PORT=$(echo "$LINE" | awk -F '	' '{ match($4,/[[:digit:]]+/); print substr($4,RSTART,RLENGTH) }')
+	
+	if [ "${script_name}"  = "g" ]; then 
 			SEL=$(echo $RESOURCE | sed -r 's:/:+:g') 
 			TMPFILE=$(mktemp /tmp/gophed_${HOST}_${SEL}_${PORT}.XXXXXXXXXXXXXXXXXXX)
 			go "$RESOURCE" "$HOST" "$PORT" > $TMPFILE
 			cat $SHOW - | ed -p ${PROMPT} $TMPFILE
 	fi
 	if [ "${script_name}" =  "d" ]; then
-		LINE=$(awk "{if (NR == $2) print \$0;}" $1)
-		RESOURCE=$(echo "$LINE" | cut -d '	' -f 2)
-		HOST=$(echo "$LINE" | cut -d '	' -f 3)
-		PORT=$(echo "$LINE" | awk -F '	' '{ match($4,/[[:digit:]]+/); print substr($4,RSTART,RLENGTH) }')
 			DIR_RESOURCE=$(dirname $RESOURCE)
 			echo "Download $RESOURCE in ${HOST}${RESOURCE}"
 			mkdir -p "$HOST/$DIR_RESOURCE"
 			go "$RESOURCE" "$HOST" "$PORT" > "${HOST}${RESOURCE}"
 	fi
+	cleanup
+	exit 0
+fi
+echo "${scriptname}: command not found"
 
 cleanup
+
+exit 1