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)

	return ignoringEINTR(func() error {
		_, err := unix.Fcntl(fd.Sysfd, syscall.F_FULLFSYNC, 0)

		// There are scenarios such as SMB mounts where fcntl will fail
		// with ENOTSUP. In those cases fallback to fsync.
		// See #64215
		if err != nil && errors.Is(err, syscall.ENOTSUP) {
			err = syscall.Fsync(fd.Sysfd)
		}
		return err
	})

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build ios

package unix

func ptrace(request int, pid int, addr uintptr, data uintptr) (err error) {
	return ENOTSUP

		}
	}
	if err != nil {
		// Some file systems do not support fallocate. We ignore that error as linking
		// can still take place, but you might SIGBUS when you write to the mmapped
		// area.
		if err != syscall.ENOTSUP && err != syscall.EPERM && err != errNoFallocate {
			return err
		}
	}
	err = out.f.Truncate(int64(filesize))
	if err != nil {
		Exitf("resize output file failed: %v", err)
	}

	if raddr != nil && ctrlCtxFn != nil {
		return nil, os.NewSyscallError("socket", syscall.ENOTSUP)
	}
	switch sotype {
	case syscall.SOCK_STREAM, syscall.SOCK_SEQPACKET, syscall.SOCK_DGRAM:
	default:
		return nil, os.NewSyscallError("socket", syscall.ENOTSUP)
	}

	fd := &netFD{
		family: family,
		sotype: sotype,
		net:    net,
	}
	fd.fakeNetFD = newFakeNetFD(fd)

// POSIX semantics for security state changes.
func TestAllThreadsSyscall(t *testing.T) {
	if _, _, err := syscall.AllThreadsSyscall(syscall.SYS_PRCTL, PR_SET_KEEPCAPS, 0, 0); err == syscall.ENOTSUP {
		t.Skip("AllThreadsSyscall disabled with cgo")
	}

	fns := []struct {
		label string
		fn    func(uintptr) error
	}{
		{
			label: "prctl<3-args>",
			fn: func(v uintptr) error {

		return e == EACCES || e == EPERM
	case oserror.ErrExist:
		return e == EEXIST || e == ENOTEMPTY
	case oserror.ErrNotExist:
		return e == ENOENT
	case errorspkg.ErrUnsupported:
		return e == ENOSYS || e == ENOTSUP || e == EOPNOTSUPP
	}
	return false
}

func (e Errno) Temporary() bool {
	return e == EINTR || e == EMFILE || e.Timeout()
}

func (e Errno) Timeout() bool {

	ENOTCONN        = syscall.Errno(0x86)
	ENOTEMPTY       = syscall.Errno(0x5d)
	ENOTNAM         = syscall.Errno(0x89)
	ENOTRECOVERABLE = syscall.Errno(0xa6)
	ENOTSOCK        = syscall.Errno(0x5f)
	ENOTSUP         = syscall.Errno(0x7a)
	ENOTUNIQ        = syscall.Errno(0x50)
	EOPNOTSUPP      = syscall.Errno(0x7a)
	EOVERFLOW       = syscall.Errno(0x4f)
	EOWNERDEAD      = syscall.Errno(0xa5)

	ENOTCONN        = syscall.Errno(0x6b)
	ENOTEMPTY       = syscall.Errno(0x27)
	ENOTNAM         = syscall.Errno(0x76)
	ENOTRECOVERABLE = syscall.Errno(0x83)
	ENOTSOCK        = syscall.Errno(0x58)
	ENOTSUP         = syscall.Errno(0x5f)
	ENOTUNIQ        = syscall.Errno(0x4c)
	EOPNOTSUPP      = syscall.Errno(0x5f)
	EOVERFLOW       = syscall.Errno(0x4b)
	EOWNERDEAD      = syscall.Errno(0x82)

	ENOTCONN        = syscall.Errno(0x6b)
	ENOTEMPTY       = syscall.Errno(0x27)
	ENOTNAM         = syscall.Errno(0x76)
	ENOTRECOVERABLE = syscall.Errno(0x83)
	ENOTSOCK        = syscall.Errno(0x58)
	ENOTSUP         = syscall.Errno(0x5f)
	ENOTUNIQ        = syscall.Errno(0x4c)
	EOPNOTSUPP      = syscall.Errno(0x5f)
	EOVERFLOW       = syscall.Errno(0x4b)
	EOWNERDEAD      = syscall.Errno(0x82)