if (t == NULL) { strlcat(buf, "<NULL>", len); return; }
bus_space_render_tag(bus_space_tag_t t, char* buf, size_t len){	buf[0] = '\0';	if (t->parent)		bus_space_render_tag(t->parent, buf, len);	strlcat(buf, "/", len);	strlcat(buf, t->name, len);}