parseNetstat parses the metrics from `/proc/net/stat/` file and returns a NetStat structure.
(filePath string)
| 51 | // parseNetstat parses the metrics from `/proc/net/stat/` file |
| 52 | // and returns a NetStat structure. |
| 53 | func parseNetstat(filePath string) (NetStat, error) { |
| 54 | netStat := NetStat{ |
| 55 | Stats: make(map[string][]uint64), |
| 56 | } |
| 57 | file, err := os.Open(filePath) |
| 58 | if err != nil { |
| 59 | return netStat, err |
| 60 | } |
| 61 | defer file.Close() |
| 62 | |
| 63 | scanner := bufio.NewScanner(file) |
| 64 | scanner.Scan() |
| 65 | |
| 66 | // First string is always a header for stats |
| 67 | var headers []string |
| 68 | headers = append(headers, strings.Fields(scanner.Text())...) |
| 69 | |
| 70 | // Other strings represent per-CPU counters |
| 71 | for scanner.Scan() { |
| 72 | for num, counter := range strings.Fields(scanner.Text()) { |
| 73 | value, err := strconv.ParseUint(counter, 16, 64) |
| 74 | if err != nil { |
| 75 | return NetStat{}, err |
| 76 | } |
| 77 | netStat.Stats[headers[num]] = append(netStat.Stats[headers[num]], value) |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | return netStat, nil |
| 82 | } |