MOUNTD_DOOR
if ((dfd = open(MOUNTD_DOOR, O_RDWR|O_CREAT|O_TRUNC,
syslog(LOG_ERR, "Unable to open %s: %m\n", MOUNTD_DOOR);
(void) fdetach(MOUNTD_DOOR);
if (fattach(doorfd, MOUNTD_DOOR) == -1) {