Merge branch '2.3' into develop

maxscale-system-test/nodes.cpp

@@ -5,6 +5,7 @@
 #include <future>
 #include <functional>
 #include <algorithm>
+#include <signal.h>
 
 #include "envv.h"
 
@@ -189,8 +190,14 @@ int Nodes::ssh_node(int node, const char* ssh, bool sudo)
     {
         return WEXITSTATUS(rc);
     }
+    else if (WIFSIGNALED(rc) && WTERMSIG(rc) == SIGHUP)
+    {
+        // SIGHUP appears to happen for SSH connections
+        return 0;
+    }
     else
     {
+        std::cout << strerror(errno) << std::endl;
         return 256;
     }
 }

server/modules/authenticator/MariaDBAuth/dbusers.cc

@@ -816,23 +816,28 @@ static bool check_default_table_permissions(MYSQL* mysql,
                             "Database name will be ignored in authentication. ");
 
     // Check whether the current user has the SHOW DATABASES privilege
-    if (mxs_mysql_query(mysql,
-                        "SELECT show_db_priv FROM mysql.user "
-                        "WHERE CONCAT(user, '@', host) = CURRENT_USER()") == 0)
+    if (mxs_mysql_query(mysql, "SHOW GRANTS") == 0)
     {
-        MYSQL_RES* res = mysql_use_result(mysql);
-        if (res)
+        if (MYSQL_RES* res = mysql_use_result(mysql))
         {
-            MYSQL_ROW row = mysql_fetch_row(res);
+            bool found = false;
 
-            if (row && strcasecmp(row[0], "Y") != 0)
+            for (MYSQL_ROW row = mysql_fetch_row(res); row; row = mysql_fetch_row(res))
+            {
+                if (strcasestr(row[0], "SHOW DATABASES"))
+                {
+                    found = true;
+                    break;
+                }
+            }
+
+            if (!found)
             {
                 MXS_WARNING("[%s] User '%s' is missing the SHOW DATABASES privilege. "
                             "This means that MaxScale cannot see all databases and authentication can fail.",
                             service->name(),
                             user);
             }
-
             mysql_free_result(res);
         }
     }