Add a function to get the select plugin id

src/common/working_cluster.c

@@ -251,3 +251,10 @@ extern char *slurmdb_cluster_flags_2_str(uint32_t flags_in)
 
 	return cluster_flags;
 }
+
+extern uint32_t slurmdb_setup_plugin_id_select(void)
+{
+	if (working_cluster_rec)
+		return working_cluster_rec->plugin_id_select;
+	return select_get_plugin_id();
+}

src/common/working_cluster.h

@@ -69,4 +69,9 @@ extern uint32_t slurmdb_str_2_cluster_flags(char *flags_in);
  */
 extern char *slurmdb_cluster_flags_2_str(uint32_t flags_in);
 
+/*
+ * Return the plugin select id of the cluster working or current
+ */
+extern uint32_t slurmdb_setup_plugin_id_select(void);
+
 #endif