func TestSysctlRaw(t *testing.T) {
if runtime.GOOS == "openbsd" {
t.Skip("kern.proc.pid does not exist on OpenBSD")
}
_, err := unix.SysctlRaw("kern.proc.pid", unix.Getpid())
if err != nil {
t.Fatal(err)
}
}
func getCPUTimes() ([]cputime, error) {
const states = 5
clockb, err := unix.SysctlRaw("kern.clockrate")
if err != nil {
return nil, err
}
clock := *(*clockinfo)(unsafe.Pointer(&clockb[0]))
cpb, err := unix.SysctlRaw("kern.cp_times")
if err != nil {
return nil, err
}
var cpufreq float64
if clock.stathz > 0 {
cpufreq = float64(clock.stathz)
} else {
cpufreq = float64(clock.hz)
}
var times []float64
for len(cpb) >= int(unsafe.Sizeof(int(0))) {
t := *(*int)(unsafe.Pointer(&cpb[0]))
times = append(times, float64(t)/cpufreq)
cpb = cpb[unsafe.Sizeof(int(0)):]
}
cpus := make([]cputime, len(times)/states)
for i := 0; i < len(times); i += states {
cpu := &cpus[i/states]
cpu.user = times[i]
cpu.nice = times[i+1]
cpu.sys = times[i+2]
cpu.intr = times[i+3]
cpu.idle = times[i+4]
}
return cpus, nil
}
func getLoad() ([]float64, error) {
type loadavg struct {
load [3]uint32
scale int
}
b, err := unix.SysctlRaw("vm.loadavg")
if err != nil {
return nil, err
}
load := *(*loadavg)(unsafe.Pointer((&b[0])))
scale := float64(load.scale)
return []float64{
float64(load.load[0]) / scale,
float64(load.load[1]) / scale,
float64(load.load[2]) / scale,
}, nil
}
func TestSysctlRaw(t *testing.T) {
_, err := unix.SysctlRaw("kern.proc.pid", unix.Getpid())
if err != nil {
t.Fatal(err)
}
}