func readBlkioValues()

in metric/system/cgroup/cgv1/blkio.go [239:270]

• 27 lines of code
• 7 McCabe index (conditional complexity)

func readBlkioValues(path ...string) ([]blkioValue, error) {
	f, err := os.Open(filepath.Join(path...))
	if err != nil {
		if os.IsNotExist(err) {
			return nil, nil
		}
		return nil, err
	}
	defer f.Close()

	var values []blkioValue
	sc := bufio.NewScanner(f)
	for sc.Scan() {
		line := strings.TrimSpace(sc.Text())
		if len(line) == 0 {
			continue
		}
		// Valid lines start with a device ID.
		if !unicode.IsNumber(rune(line[0])) {
			continue
		}

		v, err := parseBlkioValue(sc.Text())
		if err != nil {
			return nil, err
		}

		values = append(values, v)
	}

	return values, sc.Err()
}