if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

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

func Fstat(fd int, stat *Stat_t) (err error) {
	_, _, e1 := Syscall(SYS_FSTAT, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

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

//go:linkname RecvfromInet4 syscall.recvfromInet4
//go:noescape
func RecvfromInet4(fd int, p []byte, flags int, from *syscall.SockaddrInet4) (int, error)

//go:linkname RecvfromInet6 syscall.recvfromInet6
//go:noescape
func RecvfromInet6(fd int, p []byte, flags int, from *syscall.SockaddrInet6) (n int, err error)

//go:linkname SendtoInet4 syscall.sendtoInet4
//go:noescape
func SendtoInet4(fd int, p []byte, flags int, to *syscall.SockaddrInet4) (err error)

func SendtoInet6(fd int, p []byte, flags int, to *syscall.SockaddrInet6) (err error) {
	return syscall.ENOSYS
}

func SendmsgNInet4(fd int, p, oob []byte, to *syscall.SockaddrInet4, flags int) (n int, err error) {
	return 0, syscall.ENOSYS
}

func SendmsgNInet6(fd int, p, oob []byte, to *syscall.SockaddrInet6, flags int) (n int, err error) {
	return 0, syscall.ENOSYS
}

package term

import (
	"golang.org/x/sys/unix"
)

type state struct {
	termios unix.Termios
}

func isTerminal(fd int) bool {
	_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
	return err == nil
}

func makeRaw(fd int) (*State, error) {
	termios, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
	if err != nil {
		return nil, err
	}

	oldState := State{state{termios: *termios}}

		}
	case "udp":
		fd := ln.(*UDPConn).fd
		if err := checkDualStackAddrFamily(fd); err != nil {
			return err
		}
	case "udp4":
		fd := ln.(*UDPConn).fd
		if fd.family != syscall.AF_INET {
			return fmt.Errorf("%v got %v; want %v", fd.laddr, fd.family, syscall.AF_INET)
		}
	case "udp6":
		fd := ln.(*UDPConn).fd
		if fd.family != syscall.AF_INET6 {

	SYS_FCHOWNAT             = 464 // { int|sys||fchownat(int fd, const char *path, uid_t owner, gid_t group, int flag); }
	SYS_FEXECVE              = 465 // { int|sys||fexecve(int fd, char * const *argp, char * const *envp); }
	SYS_FSTATAT              = 466 // { int|sys||fstatat(int fd, const char *path, struct stat *buf, int flag); }

	SYS_FCHOWNAT             = 464 // { int|sys||fchownat(int fd, const char *path, uid_t owner, gid_t group, int flag); }
	SYS_FEXECVE              = 465 // { int|sys||fexecve(int fd, char * const *argp, char * const *envp); }
	SYS_FSTATAT              = 466 // { int|sys||fstatat(int fd, const char *path, struct stat *buf, int flag); }

			pathLen,
			oflags|OFLAG_DIRECTORY,
			rights&dirRights,
			fileRights,
			fdflags,
			unsafe.Pointer(&fd),
		)
	}
	return int(fd), errnoErr(errno)
}

func Close(fd int) error {
	errno := fd_close(int32(fd))
	return errnoErr(errno)
}

func CloseOnExec(fd int) {
	// nothing to do - no exec
}

func Mkdir(path string, perm uint32) error {
	if path == "" {
		return EINVAL

	if err != nil {
		t.Fatal(err)
	}
	err = rawconn.Control(func(fd uintptr) {
		nonblock, err := unix.IsNonblock(int(fd))
		if err != nil {
			t.Fatal(err)
		}
		if !nonblock {
			t.Fatal("unix socket as os.File is in blocking mode")
		}
	})
	if err != nil {
		t.Fatal(err)
	}

	fd := file.Fd()

	// Calling Fd should have put the descriptor into blocking mode.

//go:build js

package net

import (
	"os"
	"syscall"
)

func (fd *netFD) closeRead() error {
	if fd.fakeNetFD != nil {
		return fd.fakeNetFD.closeRead()
	}
	return os.NewSyscallError("closeRead", syscall.ENOTSUP)
}

func (fd *netFD) closeWrite() error {
	if fd.fakeNetFD != nil {
		return fd.fakeNetFD.closeWrite()
	}
	return os.NewSyscallError("closeRead", syscall.ENOTSUP)