From 95232189cdb8c11d7c9ac228164f17164f9bffa5 Mon Sep 17 00:00:00 2001
From: turtled <turtled@emqtt.io>
Date: Wed, 17 May 2017 17:15:21 +0800
Subject: [PATCH] Invalid params

---
 src/emqttd_cli2.erl | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/emqttd_cli2.erl b/src/emqttd_cli2.erl
index efae3e62f..e5fec6d20 100644
--- a/src/emqttd_cli2.erl
+++ b/src/emqttd_cli2.erl
@@ -279,8 +279,13 @@ clients_show() ->
     KeySpecs = [{'client_id', [{typecast, fun(ClientId) -> list_to_binary(ClientId) end}]}],
     FlagSpecs = [],
     Callback =
-        fun (_, [{_, ClientId}], _) ->
-            [clique_status:table(if_client(ClientId, fun print/1))]
+        fun (_, Params, _) ->
+            case get_value('client_id', Params) of
+                undefined -> 
+                    [clique_status:text(io_lib:format("Invalid params client_id is undefined~n", []))];
+                ClientId ->
+                    [clique_status:table(if_client(ClientId, fun print/1))]
+            end
         end,
     clique:register_command(Cmd, KeySpecs, FlagSpecs, Callback).