Bug#37274 client 'status' command doesn't print all info after losing connection to

          server

If the server connection was lost during repeated status commands,
the client would fail to detect this and the client output would be inconsistent.

This patch fixes this issue by making sure that the server is online
before the client attempts to execute the status command.


client/mysql.cc:
  * Replace variable "connected" with a call to mysql_real_query_for_lazy()
    will attempt to reconnect to server on if there is a failure.

client/mysql.cc

@@ -4264,41 +4264,36 @@ com_status(String *buffer __attribute__((unused)),
   MYSQL_RES *result;
   LINT_INIT(result);
 
+  if (mysql_real_query_for_lazy(
+        C_STRING_WITH_LEN("select DATABASE(), USER() limit 1")))
+    return 0;
+
   tee_puts("--------------", stdout);
   usage(1);					/* Print version */
-  if (connected)
+  tee_fprintf(stdout, "\nConnection id:\t\t%lu\n",mysql_thread_id(&mysql));
+  /*
+    Don't remove "limit 1",
+    it is protection againts SQL_SELECT_LIMIT=0
+  */
+  if (mysql_store_result_for_lazy(&result))
   {
-    tee_fprintf(stdout, "\nConnection id:\t\t%lu\n",mysql_thread_id(&mysql));
-    /* 
-      Don't remove "limit 1", 
-      it is protection againts SQL_SELECT_LIMIT=0
-    */
-    if (!mysql_query(&mysql,"select DATABASE(), USER() limit 1") &&
-	(result=mysql_use_result(&mysql)))
+    MYSQL_ROW cur=mysql_fetch_row(result);
+    if (cur)
     {
-      MYSQL_ROW cur=mysql_fetch_row(result);
-      if (cur)
-      {
-        tee_fprintf(stdout, "Current database:\t%s\n", cur[0] ? cur[0] : "");
-        tee_fprintf(stdout, "Current user:\t\t%s\n", cur[1]);
-      }
-      mysql_free_result(result);
-    } 
-#ifdef HAVE_OPENSSL
-    if ((status_str= mysql_get_ssl_cipher(&mysql)))
-      tee_fprintf(stdout, "SSL:\t\t\tCipher in use is %s\n",
-		  status_str);
-    else
-#endif /* HAVE_OPENSSL */
-      tee_puts("SSL:\t\t\tNot in use", stdout);
+      tee_fprintf(stdout, "Current database:\t%s\n", cur[0] ? cur[0] : "");
+      tee_fprintf(stdout, "Current user:\t\t%s\n", cur[1]);
+    }
+    mysql_free_result(result);
   }
+
+#ifdef HAVE_OPENSSL
+  if ((status_str= mysql_get_ssl_cipher(&mysql)))
+    tee_fprintf(stdout, "SSL:\t\t\tCipher in use is %s\n",
+                status_str);
   else
-  {
-    vidattr(A_BOLD);
-    tee_fprintf(stdout, "\nNo connection\n");
-    vidattr(A_NORMAL);
-    return 0;
-  }
+#endif /* HAVE_OPENSSL */
+    tee_puts("SSL:\t\t\tNot in use", stdout);
+
   if (skip_updates)
   {
     vidattr(A_BOLD);
@@ -4317,8 +4312,14 @@ com_status(String *buffer __attribute__((unused)),
     tee_fprintf(stdout, "Insert id:\t\t%s\n", llstr(id, buff));
 
   /* "limit 1" is protection against SQL_SELECT_LIMIT=0 */
-  if (!mysql_query(&mysql,"select @@character_set_client, @@character_set_connection, @@character_set_server, @@character_set_database limit 1") &&
-      (result=mysql_use_result(&mysql)))
+  if (mysql_real_query_for_lazy(C_STRING_WITH_LEN(
+        "select @@character_set_client, @@character_set_connection, "
+        "@@character_set_server, @@character_set_database limit 1")))
+  {
+    if (mysql_errno(&mysql) == CR_SERVER_GONE_ERROR)
+      return 0;
+  }
+  if (mysql_store_result_for_lazy(&result))
   {
     MYSQL_ROW cur=mysql_fetch_row(result);
     if (cur)