base = base[:idx]
		}
		for {
			// Automatically read "file.ext", "file-2.ext", "file-3.ext"...
			fn := base + ext
			if n > 1 {
				fn = fmt.Sprintf("%s-%d%s", base, n, ext)
			}

			if b, err := os.ReadFile(fn); err == nil {
				privateKeys = append(privateKeys, b)
				fmt.Println("Added private key from", fn)
			} else {
				break
			}
			n++
		}

	// File operations.
	ListDir(ctx context.Context, origvolume, volume, dirPath string, count int) ([]string, error)
	ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error)
	AppendFile(ctx context.Context, volume string, path string, buf []byte) (err error)

				result = append(result, localDisk{index: index, path: u.Path})
			}
		}
	}

	return result, nil
}

func getFormatJSON(path string) (format, error) {
	formatJSON, err := os.ReadFile(filepath.Join(path, ".minio.sys/format.json"))
	if err != nil {
		return format{}, err
	}
	var f format
	err = json.Unmarshal(formatJSON, &f)
	if err != nil {
		return format{}, err
	}

// tries to verify whether the disk has bitrot.
//
// Additionally ReadFile also starts reading from an offset. ReadFile
// semantics are same as io.ReadFull.
func (s *xlStorage) ReadFile(ctx context.Context, volume string, path string, offset int64, buffer []byte, verifier *BitrotVerifier) (int64, error) {
	if offset < 0 {
		return 0, errInvalidArgument
	}

	volumeDir, err := s.getVolDir(volume)
	if err != nil {

	if sshPrivateKey == "" {
		logger.Fatal(fmt.Errorf("invalid arguments passed, private key file is mandatory for --sftp='ssh-private-key=path/to/id_ecdsa'"), "unable to start SFTP server")
	}

	privateBytes, err := os.ReadFile(sshPrivateKey)
	if err != nil {
		logger.Fatal(fmt.Errorf("invalid arguments passed, private key file is not accessible: %v", err), "unable to start SFTP server")
	}

	private, err := ssh.ParsePrivateKey(privateBytes)

		t.Fatal(err)
	}
	name2 := f.Name()
	defer os.Remove(name2)
	f.WriteString("bbbbbbbbbb")
	f.Close()

	if err = AppendFile(name1, name2, false); err != nil {
		t.Error(err)
	}

	b, err := os.ReadFile(name1)
	if err != nil {
		t.Error(err)
	}

	expected := "aaaaaaaaaabbbbbbbbbb"
	if string(b) != expected {
		t.Errorf("AppendFile() failed, expected: %s, got %s", expected, string(b))
	}
}

func isSysErrCrossDevice(err error) bool {
	return errors.Is(err, syscall.EXDEV)
}

// Check if given error corresponds to too many open files
func isSysErrTooManyFiles(err error) bool {
	return errors.Is(err, syscall.ENFILE) || errors.Is(err, syscall.EMFILE)
}

func osIsNotExist(err error) bool {
	return errors.Is(err, os.ErrNotExist)
}

func osIsPermission(err error) bool {

pkg os, method (*Root) Lchown(string, int, int) error #67002
pkg os, method (*Root) Link(string, string) error #67002
pkg os, method (*Root) MkdirAll(string, fs.FileMode) error #67002
pkg os, method (*Root) ReadFile(string) ([]uint8, error) #73126
pkg os, method (*Root) Readlink(string) (string, error) #67002
pkg os, method (*Root) RemoveAll(string) error #67002
pkg os, method (*Root) Rename(string, string) error #67002

//
//	"/.dockerenv":        "file",
//	"/run/.containerenv": "file",
func IsDocker() bool {
	var err error
	for _, envfile := range []string{
		"/.dockerenv",
		"/run/.containerenv",
	} {
		_, err = os.Stat(envfile)
		if err == nil {
			return true
		}
	}
	if osIsNotExist(err) {
		// if none of the files are present we may be running inside

			f, err := os.Create(goldenFile)
			if err != nil {
				t.Fatal(err)
			}
			for _, feat := range w.Features() {
				fmt.Fprintf(f, "%s\n", feat)
			}
			f.Close()
		}

		bs, err := os.ReadFile(goldenFile)
		if err != nil {
			t.Fatalf("opening golden.txt for package %q: %v", fi.Name(), err)
		}
		wanted := strings.Split(string(bs), "\n")
		slices.Sort(wanted)
		for _, feature := range wanted {