func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
	val = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func ioctl(fd int, req int, arg int) (err error) {

// (as passed in the kind parameter) it tries to add the file to
// the runtime poller.
func newFile(fd int, name string, kind newFileKind, nonBlocking bool) *File {
	f := &File{&file{
		pfd: poll.FD{
			Sysfd:         fd,
			IsStream:      true,
			ZeroReadIsEOF: true,
		},
		name:        name,
		stdoutOrErr: fd == 1 || fd == 2,
	}}

	pollable := kind == kindOpenFile || kind == kindPipe || kind == kindSock || nonBlocking

func (f *File) Fd() uintptr {
	if f == nil {
		return ^(uintptr(0))
	}
	return uintptr(f.fd)
}

// NewFile returns a new File with the given file descriptor and
// name. The returned value will be nil if fd is not a valid file
// descriptor.
func NewFile(fd uintptr, name string) *File {
	fdi := int(fd)
	if fdi < 0 {
		return nil
	}
	f := &File{&file{fd: fdi, name: name}}

func Close(fd int) (err error) {
	_, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Close)), 1, uintptr(fd), 0, 0, 0, 0, 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Dup(fd int) (nfd int, err error) {
	r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Dup)), 1, uintptr(fd), 0, 0, 0, 0, 0)
	nfd = int(r0)

func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
	val = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func ioctl(fd int, req int, arg int) (err error) {

func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
	val = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func ioctl(fd int, req int, arg int) (err error) {

func fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) {
	r0, _, e1 := syscall(abi.FuncPCABI0(libc_fcntl_trampoline), uintptr(fd), uintptr(cmd), uintptr(arg))
	val = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func ioctl(fd int, req int, arg int) (err error) {

//sys	Chroot(path string) (err error)
//sys	Close(fd int) (err error)
//sys	Dup(oldfd int) (fd int, err error)
//sys	Dup3(oldfd int, newfd int, flags int) (err error)
//sysnb	EpollCreate1(flag int) (fd int, err error)
//sysnb	EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error)
//sys	Fallocate(fd int, mode uint32, off int64, len int64) (err error)
//sys	Fchdir(fd int) (err error)

	// If crashing, print a copy to the SetCrashOutput fd.
	gp := getg()
	if gp != nil && gp.m.dying > 0 ||
		gp == nil && panicking.Load() > 0 {
		if fd := crashFD.Load(); fd != ^uintptr(0) {
			write(fd, unsafe.Pointer(data), n)
		}
	}
}

// crashFD is an optional file descriptor to use for fatal panics, as
// set by debug.SetCrashOutput (see #42888). If it is a valid fd (not

	}
	return n, err
}

// Write implements the Conn Write method.
func (c *conn) Write(b []byte) (int, error) {
	if !c.ok() {
		return 0, syscall.EINVAL
	}
	n, err := c.fd.Write(b)
	if err != nil {
		err = &OpError{Op: "write", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err}
	}
	return n, err
}

// Close closes the connection.