| package procfs |
| |
| import ( |
| "bufio" |
| "fmt" |
| "os" |
| "strconv" |
| "strings" |
| ) |
| |
| // Stat represents kernel/system statistics. |
| type Stat struct { |
| // Boot time in seconds since the Epoch. |
| BootTime int64 |
| } |
| |
| // NewStat returns kernel/system statistics read from /proc/stat. |
| func NewStat() (Stat, error) { |
| fs, err := NewFS(DefaultMountPoint) |
| if err != nil { |
| return Stat{}, err |
| } |
| |
| return fs.NewStat() |
| } |
| |
| // NewStat returns an information about current kernel/system statistics. |
| func (fs FS) NewStat() (Stat, error) { |
| f, err := os.Open(fs.Path("stat")) |
| if err != nil { |
| return Stat{}, err |
| } |
| defer f.Close() |
| |
| s := bufio.NewScanner(f) |
| for s.Scan() { |
| line := s.Text() |
| if !strings.HasPrefix(line, "btime") { |
| continue |
| } |
| fields := strings.Fields(line) |
| if len(fields) != 2 { |
| return Stat{}, fmt.Errorf("couldn't parse %s line %s", f.Name(), line) |
| } |
| i, err := strconv.ParseInt(fields[1], 10, 32) |
| if err != nil { |
| return Stat{}, fmt.Errorf("couldn't parse %s: %s", fields[1], err) |
| } |
| return Stat{BootTime: i}, nil |
| } |
| if err := s.Err(); err != nil { |
| return Stat{}, fmt.Errorf("couldn't parse %s: %s", f.Name(), err) |
| } |
| |
| return Stat{}, fmt.Errorf("couldn't parse %s, missing btime", f.Name()) |
| } |