fcntl_getlocks
fcntl_getlocks(fildes, start, l.l_start - start, lock, end);
rv += fcntl_getlocks(fildes, l.l_start + l.l_len, len, lock, end);
rv += fcntl_getlocks(fildes, l.l_start + l.l_len, len, lock, end);
nlocks = fcntl_getlocks(fd[i], 0, sz,