some error processing to whatismyip

web/whatismyip

@@ -16,8 +16,12 @@ done
 IP=$( dig +short myip.opendns.com @resolver1.opendns.com )
 
 if [[ "$NAME" -eq 1 ]]; then 
-  dig +short -x "$IP"
+  output=$( dig +short -x "$IP" )
 else
-  echo $IP
+  output="$IP"
 fi
 
+if [[ -z "$output" ]]; then
+  exit 1
+fi
+echo "$output"