LOCK_UNAVAIL
errno == EAGAIN || errno == EWOULDBLOCK ? LOCK_UNAVAIL : LOCK_FAILED :
case LOCK_UNAVAIL:
if (!noname && file_lock(sp, NULL, NULL, fd, 0) == LOCK_UNAVAIL)
case LOCK_UNAVAIL:
if (file_lock(sp, NULL, NULL, fileno(fp), 0) == LOCK_UNAVAIL)