| // +build linux |
| |
| package common |
| |
| import ( |
| "os" |
| "os/exec" |
| "strings" |
| ) |
| |
| func DoSysctrl(mib string) ([]string, error) { |
| sysctl, err := exec.LookPath("/sbin/sysctl") |
| if err != nil { |
| return []string{}, err |
| } |
| cmd := exec.Command(sysctl, "-n", mib) |
| cmd.Env = getSysctrlEnv(os.Environ()) |
| out, err := cmd.Output() |
| if err != nil { |
| return []string{}, err |
| } |
| v := strings.Replace(string(out), "{ ", "", 1) |
| v = strings.Replace(string(v), " }", "", 1) |
| values := strings.Fields(string(v)) |
| |
| return values, nil |
| } |
| |
| func NumProcs() (uint64, error) { |
| f, err := os.Open(HostProc()) |
| if err != nil { |
| return 0, err |
| } |
| defer f.Close() |
| |
| list, err := f.Readdirnames(-1) |
| if err != nil { |
| return 0, err |
| } |
| return uint64(len(list)), err |
| } |