tables_foreach
error = tables_foreach(table_destroy_one, &oh, 1);
error = tables_foreach(table_flush_one, &oh, 1);
error = tables_foreach(table_show_info, arg, 1);
error = tables_foreach(table_show_one, arg, 1);
static int tables_foreach(table_cb_t *f, void *arg, int sort);