Move to typical go project layout, fix golangci-lint warnings, update deps

vendor/github.com/lufia/plan9stats/host.go

@@ -109,6 +109,12 @@ func parseGauge(s string, r *Gauge) error {
 	return nil
 }
 
+type Storage struct {
+	Name     string
+	Model    string
+	Capacity int64
+}
+
 type Interface struct {
 	Name string
 	Addr string
@@ -171,7 +177,7 @@ func ReadHost(ctx context.Context, opts ...Option) (*Host, error) {
 	}
 	h.Sysname = name
 
-	a, err := ReadStorages(ctx, opts...)
+	a, err := readStorages(cfg.rootdir)
 	if err != nil {
 		return nil, err
 	}
@@ -197,6 +203,80 @@ func readSysname(rootdir string) (string, error) {
 	return string(bytes.TrimSpace(b)), nil
 }
 
+func readStorages(rootdir string) ([]*Storage, error) {
+	sdctl := filepath.Join(rootdir, "/dev/sdctl")
+	f, err := os.Open(sdctl)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var a []*Storage
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		fields := bytes.Split(scanner.Bytes(), delim)
+		if len(fields) == 0 {
+			continue
+		}
+		exp := string(fields[0]) + "*"
+		if !strings.HasPrefix(exp, "sd") {
+			continue
+		}
+		dir := filepath.Join(rootdir, "/dev", exp)
+		m, err := filepath.Glob(dir)
+		if err != nil {
+			return nil, err
+		}
+		for _, dir := range m {
+			s, err := readStorage(dir)
+			if err != nil {
+				return nil, err
+			}
+			a = append(a, s)
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+	return a, nil
+}
+
+func readStorage(dir string) (*Storage, error) {
+	ctl := filepath.Join(dir, "ctl")
+	f, err := os.Open(ctl)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	var s Storage
+	s.Name = filepath.Base(dir)
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Bytes()
+		switch {
+		case bytes.HasPrefix(line, []byte("inquiry")):
+			s.Model = string(bytes.TrimSpace(line[7:]))
+		case bytes.HasPrefix(line, []byte("geometry")):
+			fields := bytes.Split(line, delim)
+			if len(fields) < 3 {
+				continue
+			}
+			var p intParser
+			sec := p.ParseInt64(string(fields[1]), 10)
+			size := p.ParseInt64(string(fields[2]), 10)
+			if err := p.Err(); err != nil {
+				return nil, err
+			}
+			s.Capacity = sec * size
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+	return &s, nil
+}
+
 type IPStats struct {
 	ID      int    // number of interface in ipifc dir
 	Device  string // associated physical device