n += nn
	}
	if len(b) == n && err == io.EOF {
		err = nil
	}
	return n, err
}

// readSpecialFile is like io.ReadAll except it returns
// ErrFieldTooLong if more than maxSpecialFileSize is read.
func readSpecialFile(r io.Reader) ([]byte, error) {
	buf, err := io.ReadAll(io.LimitReader(r, maxSpecialFileSize+1))
	if len(buf) > maxSpecialFileSize {
		return nil, ErrFieldTooLong
	}
	return buf, err
}

		return
	}
	start, err := f.DataOffset()
	if err != nil {
		t.Errorf("%v: DataOffset error=%v", f.Name, err)
		return
	}
	got, err := io.ReadAll(rw)
	if err != nil {
		t.Errorf("%v: OpenRaw ReadAll error=%v", f.Name, err)
		return
	}
	end := uint64(start) + f.CompressedSize64
	want := raw[start:end]
	if !bytes.Equal(got, want) {
		t.Logf("got %q", got)

	}

	// Validates all testcases.
	for i, testCase := range testCases {
		s3Error := isReqAuthenticated(ctx, testCase.req, globalSite.Region(), serviceS3)
		if s3Error != testCase.s3Error {
			if _, err := io.ReadAll(testCase.req.Body); toAPIErrorCode(ctx, err) != testCase.s3Error {
				t.Fatalf("Test %d: Unexpected S3 error: want %d - got %d (got after reading request %s)", i, testCase.s3Error, s3Error, toAPIError(ctx, err).Code)
			}
		}

		rs := &HTTPRangeSpec{IsSuffixLength: true, Start: int64(-size)}
		gr, err := objectAPI.GetObjectNInfo(ctx, bucket, object, rs, nil, opts)
		if err != nil {
			return nil, ObjectInfo{}, err
		}
		b, err := io.ReadAll(gr)
		gr.Close()
		if err != nil {
			return nil, ObjectInfo{}, err
		}
		if size > len(b) {
			size = len(b)
		}

		// Calculate the object real size if encrypted

	}
	_, err = dexClient.Do(req)
	// fmt.Printf("Fetch LDAP login page: %#v %#v\n", resp, err)
	if err != nil {
		return "", fmt.Errorf("request err: %v", err)
	}
	// {
	// 	bodyBuf, err := io.ReadAll(resp.Body)
	// 	if err != nil {
	// 		return "", fmt.Errorf("Error reading body: %v", err)
	// 	}
	// 	fmt.Printf("bodyBuf (for LDAP login page): %s\n", string(bodyBuf))
	// }

	r := loadMetacacheSample(t)
	defer r.Close()
	var readErr error
	objs := make(chan metaCacheEntry, 1)
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		readErr = r.readAll(t.Context(), objs)
		wg.Done()
	}()
	want := loadMetacacheSampleNames
	i := 0
	for entry := range objs {
		if entry.name != want[i] {
			t.Errorf("entry %d, want %q, got %q", i, want[i], entry.name)
		}

	if err != nil {
		return err
	}
	defer stat.Close()
	// Serialize check and copying.
	if err := syscall.Flock(int(stat.Fd()), syscall.LOCK_EX); err != nil {
		return err
	}
	s, err := io.ReadAll(stat)
	if err != nil {
		return err
	}
	if string(s) == goVersion {
		return nil
	}

	goroot, err := findGoroot()
	if err != nil {
		return err
	}

			Code:       AdminUpdateUnexpectedFailure,
			Message:    fmt.Sprintf("Error downloading URL %s. Response: %v", u, resp.Status),
			StatusCode: resp.StatusCode,
		}
	}

	contentBytes, err := io.ReadAll(resp.Body)
	if err != nil {
		return content, AdminError{
			Code:       AdminUpdateUnexpectedFailure,
			Message:    fmt.Sprintf("Error reading response. %s", err),
			StatusCode: http.StatusInternalServerError,

	r, _ := newS2CompressReader(bytes.NewBuffer(data), int64(len(data)), true)
	b, err := io.ReadAll(r)
	failOnErr(err)
	failOnErr(r.Close())
	// Decompression reader.
	s2Reader := s2.NewReader(bytes.NewBuffer(b))
	// Apply the skipLen on the decompressed stream.
	failOnErr(s2Reader.Skip(skip))
	got, err := io.ReadAll(s2Reader)
	failOnErr(err)
	if !bytes.Equal(got, data[skip:]) {

	if disk == nil {
		return nil, errors.New("loadHealingTracker: nil drive given")
	}
	diskID, err := disk.GetDiskID()
	if err != nil {
		return nil, err
	}
	b, err := disk.ReadAll(ctx, minioMetaBucket,
		pathJoin(bucketMetaPrefix, healingTrackerFilename))
	if err != nil {
		return nil, err
	}
	var h healingTracker
	_, err = h.UnmarshalMsg(b)
	if err != nil {
		return nil, err