func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
	r0, _, e1 := syscall_syscall(libc_lseek_trampoline_addr, uintptr(fd), uintptr(offset), uintptr(whence))
	newoffset = int64(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_lseek_trampoline_addr uintptr

//go:cgo_import_dynamic libc_lseek lseek "/usr/lib/libSystem.B.dylib"

func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
	r0, _, e1 := syscall_syscall(libc_lseek_trampoline_addr, uintptr(fd), uintptr(offset), uintptr(whence))
	newoffset = int64(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_lseek_trampoline_addr uintptr

//go:cgo_import_dynamic libc_lseek lseek "/usr/lib/libSystem.B.dylib"

	// It's not the full required semantics, but should handle the case
	// of calling Getdirentries or ReadDirent repeatedly.
	// It won't handle assigning the results of lseek to *basep, or handle
	// the directory being edited underfoot.

	skip, err := Seek(fd, 0, 1 /* SEEK_CUR */)
	if err != nil {
		return 0, err
	}

	// Get path from fd to avoid unavailable call (fdopendir)
	path, err := ZosFdToPath(fd)

	if err != nil {
		t.Fatal(err)
	}
	_, err = r.Seek(0, 0)
	if err == nil {
		t.Fatal("Seek on pipe should fail")
	}
	if perr, ok := err.(*PathError); !ok || perr.Err != syscall.ESPIPE {
		t.Errorf("Seek returned error %v, want &PathError{Err: syscall.ESPIPE}", err)
	}
	_, err = w.Seek(0, 0)
	if err == nil {
		t.Fatal("Seek on pipe should fail")
	}

	req.Header.Set("x-amz-decoded-content-length", strconv.FormatInt(dataLength, 10))
	req.Header.Set("content-length", strconv.FormatInt(contentLength, 10))

	// Seek back to beginning.
	body.Seek(0, 0)

	// Add body
	req.Body = io.NopCloser(body)
	req.ContentLength = contentLength

	return req, nil
}

	if e != nil {
		return "", e
	}
	return UTF16ToString(b[:n]), nil
}

func Ftruncate(fd Handle, length int64) (err error) {
	curoffset, e := Seek(fd, 0, 1)
	if e != nil {
		return e
	}
	defer Seek(fd, curoffset, 0)
	_, e = Seek(fd, length, 0)
	if e != nil {
		return e
	}
	e = SetEndOfFile(fd)
	if e != nil {
		return e
	}
	return nil
}

	sf := sec.Open()
	if got, err := sf.Seek(0, io.SeekEnd); got != int64(len(b)) || err != nil {
		t.Fatalf("want seek end %d, got %d error %v", len(b), got, err)
	}
	if n, err := sf.Read(buf); n != 0 || err != io.EOF {
		t.Fatalf("want EOF with 0 bytes, got %v with %d bytes", err, n)
	}
	pos := int64(len(buf))
	for count < len(buf) {
		// Construct random seek arguments.
		whence := rand.Intn(3)

	return time.Duration(getTickCount64()) * time.Millisecond
}

func Ftruncate(fd Handle, length int64) (err error) {
	curoffset, e := Seek(fd, 0, 1)
	if e != nil {
		return e
	}
	defer Seek(fd, curoffset, 0)
	_, e = Seek(fd, length, 0)
	if e != nil {
		return e
	}
	e = SetEndOfFile(fd)
	if e != nil {
		return e
	}
	return nil
}

	buf := NewReader(r)
	allocs := testing.AllocsPerRun(100, func() {
		r.Seek(0, io.SeekStart)
		buf.Reset(r)

		_, err := buf.ReadString('\n')
		if err != nil {
			t.Fatal(err)
		}
	})
	if allocs != 1 {
		t.Errorf("Unexpected number of allocations, got %f, want 1", allocs)

	23:  "too many open files in system",
	24:  "too many open files",
	25:  "inappropriate ioctl for device",
	26:  "text file busy",
	27:  "file too large",
	28:  "no space left on device",
	29:  "illegal seek",
	30:  "read-only file system",
	31:  "too many links",
	32:  "broken pipe",
	33:  "numerical argument out of domain",
	34:  "result too large",
	35:  "resource temporarily unavailable",