func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) (err error) {
	_, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_fcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(unsafe.Pointer(lk)), 0, 0, 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return

	runtimeCtx uintptr
}

var serverInit sync.Once

func (pd *pollDesc) init(fd *FD) error {
	serverInit.Do(runtime_pollServerInit)
	ctx, errno := runtime_pollOpen(uintptr(fd.Sysfd))
	if errno != 0 {
		return errnoErr(syscall.Errno(errno))
	}
	pd.runtimeCtx = ctx
	return nil
}

func (pd *pollDesc) close() {
	if pd.runtimeCtx == 0 {
		return
	}
	runtime_pollClose(pd.runtimeCtx)
	pd.runtimeCtx = 0
}

	if err != nil {
		return err
	}
	if nonblocking {
		flags |= FDFLAG_NONBLOCK
	} else {
		flags &^= FDFLAG_NONBLOCK
	}
	errno := fd_fdstat_set_flags(int32(fd), flags)
	return errnoErr(errno)
}

type Rlimit struct {
	Cur uint64
	Max uint64
}

const (
	RLIMIT_NOFILE = iota
)

func Getrlimit(which int, lim *Rlimit) error {
	return ENOSYS