-bool do_vlan_8021q_del (int argc, const char **argv, struct ngadmin *nga);
-bool do_vlan_8021q_set (int argc, const char **argv, struct ngadmin *nga);
-bool do_vlan_8021q_show (int argc, const char **argv, struct ngadmin *nga);
-bool do_vlan_mode_set (int argc, const char **argv, struct ngadmin *nga);
-bool do_vlan_mode_show (int argc, const char **argv, struct ngadmin *nga);
-bool do_vlan_pvid_set (int argc, const char **argv, struct ngadmin *nga);
-bool do_vlan_pvid_show (int argc, const char **argv, struct ngadmin *nga);
+int do_vlan_8021q_del (int argc, const char **argv, struct ngadmin *nga);
+int do_vlan_8021q_set (int argc, const char **argv, struct ngadmin *nga);
+int do_vlan_8021q_show (int argc, const char **argv, struct ngadmin *nga);
+int do_vlan_mode_set (int argc, const char **argv, struct ngadmin *nga);
+int do_vlan_mode_show (int argc, const char **argv, struct ngadmin *nga);
+int do_vlan_pvid_set (int argc, const char **argv, struct ngadmin *nga);
+int do_vlan_pvid_show (int argc, const char **argv, struct ngadmin *nga);