import (
	"bufio"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"syscall"
)

const (
	// Number of fields per line in /proc/mounts as per the fstab man page.
	expectedNumFieldsPerLine = 6
	// Location of the mount file to use
	procMountsPath = "/proc/mounts"
)

// IsLikelyMountPoint determines if a directory is a mountpoint.
func IsLikelyMountPoint(path string) bool {
	s1, err := os.Lstat(path)

	"github.com/prometheus/procfs"
)

// GetInterfaceNetStats - get procfs.NetDevLine by interfaceName
func GetInterfaceNetStats(interf string) (procfs.NetDevLine, error) {
	proc, err := procfs.Self()
	if err != nil {
		return procfs.NetDevLine{}, err
	}
	netDev, err := proc.NetDev()
	if err != nil {
		return procfs.NetDevLine{}, err
	}
	ndl, ok := netDev[interf]
	if !ok {

	result := make(map[string]string)

	mountInfo, err := os.Open("/proc/self/mountinfo")
	if err != nil {
		return nil, err
	}
	defer mountInfo.Close()

	scanner := bufio.NewScanner(mountInfo)
	for scanner.Scan() {
		s := strings.Split(scanner.Text(), " ")
		if len(s) != 11 {
			return nil, errors.New("unsupported /proc/self/mountinfo format")
		}
		result[s[2]] = s[9]
	}

		Type:      counterMetric,
	}
}

func getMinioProcessIOReadBytesMD() MetricDescription {
	return MetricDescription{
		Namespace: nodeMetricNamespace,
		Subsystem: ioSubsystem,
		Name:      readBytes,
		Help:      "Total bytes read by the process from the underlying storage system, /proc/[pid]/io read_bytes",
		Type:      counterMetric,

//
// During evaluation, the query is known to be valid, as analysis is
// complete. The only errors possible are due to value type
// mismatches, etc.
//
// If an aggregation node is present as a descendant (when
// e.prop.isAggregation is true), we call evalNode on all child nodes,
// check for errors, but do not perform any combining of the results
// of child nodes. The final result row is returned after all rows are

	// Success case, where path doesn't have any mounts.
	{
		if err = mounts.checkCrossMounts("/path/to/x"); err != nil {
			t.Fatalf("Expected success, failed instead (%s)", err)
		}
	}
}

// Tests read proc mounts file.
func TestReadProcmountInfos(t *testing.T) {
	successCase := `/dev/0 /path/to/0 type0 flags 0 0
		/dev/1    /path/to/1   type1	flags 1 1
		/dev/2 /path/to/2 type2 flags,1,2=3 2 2
		`
	var err error

package mountinfo

// mountInfo - This represents a single line in /proc/mounts.
type mountInfo struct {
	Device  string
	Path    string
	FSType  string
	Options []string
	Freq    string
	Pass    string
}

func (m mountInfo) String() string {
	return m.Path
}

// mountInfos - This represents the entire /proc/mounts.

		if r.Err != nil {
			if debugPrint {
				fmt.Println("Closing mux", m.MuxID, "due to error:", r.Err)
			}
			m.closeLocked()
		}
		return true
	default:
		if m.stateless {
			// Drop message if not stateful.
			return
		}
		err := errors.New("INTERNAL ERROR: Response was blocked")
		gridLogIf(m.ctx, err)
		m.closeLocked()
		return false
	}
}

func (m *muxClient) close() {

| `io_read_bytes`               | `counter` | Total bytes read by the process from the underlying storage system, /proc/[pid]/io read_bytes                  | `server` |
| `io_wchar_bytes`              | `counter` | Total bytes written by the process to the underlying storage system including page cache, /proc/[pid]/io wchar | `server` |

| `minio_node_io_read_bytes`                 | Total bytes read by the process from the underlying storage system, /proc/[pid]/io read_bytes.                  |
| `minio_node_io_wchar_bytes`                | Total bytes written by the process to the underlying storage system including page cache, /proc/[pid]/io wchar. |