Golang common.DoSysctrl函数代码示例

// Returns only one InfoStat on FreeBSD.  The information regarding core
// count, however is accurate and it is assumed that all InfoStat attributes
// are the same across CPUs.
func Info() ([]InfoStat, error) {
	const dmesgBoot = "/var/run/dmesg.boot"
	lines, _ := common.ReadLines(dmesgBoot)

	c := InfoStat{}
	var vals []string
	var err error
	if vals, err = common.DoSysctrl("hw.clockrate"); err != nil {
		return nil, err
	}
	if c.Mhz, err = strconv.ParseFloat(vals[0], 64); err != nil {
		return nil, fmt.Errorf("Unable to parse FreeBSD CPU clock rate: %v", err)
	}
	c.CPU = int32(c.Mhz)

	if vals, err = common.DoSysctrl("hw.ncpu"); err != nil {
		return nil, err
	}
	var i64 int64
	if i64, err = strconv.ParseInt(vals[0], 10, 32); err != nil {
		return nil, fmt.Errorf("Unable to parse FreeBSD cores: %v", err)
	}
	c.Cores = int32(i64)

	if vals, err = common.DoSysctrl("hw.model"); err != nil {
		return nil, err
	}
	c.ModelName = strings.Join(vals, " ")

	for _, line := range lines {
		if matches := regexp.MustCompile(`Origin\s*=\s*"(.+)"\s+Id\s*=\s*(.+)\s+Family\s*=\s*(.+)\s+Model\s*=\s*(.+)\s+Stepping\s*=\s*(.+)`).FindStringSubmatch(line); matches != nil {
			c.VendorID = matches[1]
			c.Family = matches[3]
			c.Model = matches[4]
			t, err := strconv.ParseInt(matches[5], 10, 32)
			if err != nil {
				return nil, fmt.Errorf("Unable to parse FreeBSD CPU stepping information from %q: %v", line, err)
			}
			c.Stepping = int32(t)
		} else if matches := regexp.MustCompile(`Features=.+<(.+)>`).FindStringSubmatch(line); matches != nil {
			for _, v := range strings.Split(matches[1], ",") {
				c.Flags = append(c.Flags, strings.ToLower(v))
			}
		} else if matches := regexp.MustCompile(`Features2=[a-f\dx]+<(.+)>`).FindStringSubmatch(line); matches != nil {
			for _, v := range strings.Split(matches[1], ",") {
				c.Flags = append(c.Flags, strings.ToLower(v))
			}
		}
	}

	return []InfoStat{c}, nil
}

func HostInfo() (*HostInfoStat, error) {
	ret := &HostInfoStat{
		OS:             runtime.GOOS,
		PlatformFamily: "freebsd",
	}

	hostname, err := os.Hostname()
	if err == nil {
		ret.Hostname = hostname
	}

	platform, family, version, err := GetPlatformInformation()
	if err == nil {
		ret.Platform = platform
		ret.PlatformFamily = family
		ret.PlatformVersion = version
	}
	system, role, err := GetVirtualization()
	if err == nil {
		ret.VirtualizationSystem = system
		ret.VirtualizationRole = role
	}

	values, err := common.DoSysctrl("kern.boottime")
	if err == nil {
		// ex: { sec = 1392261637, usec = 627534 } Thu Feb 13 12:20:37 2014
		v := strings.Replace(values[2], ",", "", 1)
		t, err := strconv.ParseUint(v, 10, 64)
		if err == nil {
			ret.Uptime = t
		}
	}

	return ret, nil
}

// VirtualMemory returns VirtualmemoryStat.
func VirtualMemory() (*VirtualMemoryStat, error) {
	ret := &VirtualMemoryStat{}

	p, err := getPageSize()
	if err != nil {
		return nil, err
	}
	t, err := common.DoSysctrl("hw.memsize")
	if err != nil {
		return nil, err
	}
	total, err := strconv.ParseUint(t[0], 10, 64)
	if err != nil {
		return nil, err
	}
	err = getVmStat(p, ret)
	if err != nil {
		return nil, err
	}

	ret.Available = ret.Free + ret.Cached
	ret.Total = total

	ret.Used = ret.Total - ret.Free
	ret.UsedPercent = float64(ret.Total-ret.Available) / float64(ret.Total) * 100.0

	return ret, nil
}

func Avg() (*AvgStat, error) {
	values, err := common.DoSysctrl("vm.loadavg")
	if err != nil {
		return nil, err
	}

	load1, err := strconv.ParseFloat(values[0], 64)
	if err != nil {
		return nil, err
	}
	load5, err := strconv.ParseFloat(values[1], 64)
	if err != nil {
		return nil, err
	}
	load15, err := strconv.ParseFloat(values[2], 64)
	if err != nil {
		return nil, err
	}

	ret := &AvgStat{
		Load1:  float64(load1),
		Load5:  float64(load5),
		Load15: float64(load15),
	}

	return ret, nil
}

func Times(percpu bool) ([]TimesStat, error) {
	var ret []TimesStat

	var sysctlCall string
	var ncpu int
	if percpu {
		sysctlCall = "kern.cp_times"
		ncpu, _ = Counts(true)
	} else {
		sysctlCall = "kern.cp_time"
		ncpu = 1
	}

	cpuTimes, err := common.DoSysctrl(sysctlCall)
	if err != nil {
		return ret, err
	}

	for i := 0; i < ncpu; i++ {
		offset := CPUStates * i
		user, err := strconv.ParseFloat(cpuTimes[CPUser+offset], 64)
		if err != nil {
			return ret, err
		}
		nice, err := strconv.ParseFloat(cpuTimes[CPNice+offset], 64)
		if err != nil {
			return ret, err
		}
		sys, err := strconv.ParseFloat(cpuTimes[CPSys+offset], 64)
		if err != nil {
			return ret, err
		}
		idle, err := strconv.ParseFloat(cpuTimes[CPIdle+offset], 64)
		if err != nil {
			return ret, err
		}
		intr, err := strconv.ParseFloat(cpuTimes[CPIntr+offset], 64)
		if err != nil {
			return ret, err
		}

		c := TimesStat{
			User:   float64(user / ClocksPerSec),
			Nice:   float64(nice / ClocksPerSec),
			System: float64(sys / ClocksPerSec),
			Idle:   float64(idle / ClocksPerSec),
			Irq:    float64(intr / ClocksPerSec),
		}
		if !percpu {
			c.CPU = "cpu-total"
		} else {
			c.CPU = fmt.Sprintf("cpu%d", i)
		}

		ret = append(ret, c)
	}

	return ret, nil
}

func Info() (*InfoStat, error) {
	ret := &InfoStat{
		OS: runtime.GOOS,
	}

	hostname, err := os.Hostname()
	if err == nil {
		ret.Hostname = hostname
	}

	platform, family, version, err := PlatformInformation()
	if err == nil {
		ret.Platform = platform
		ret.PlatformFamily = family
		ret.PlatformVersion = version
	}
	kernelVersion, err := KernelVersion()
	if err == nil {
		ret.KernelVersion = kernelVersion
	}

	system, role, err := Virtualization()
	if err == nil {
		ret.VirtualizationSystem = system
		ret.VirtualizationRole = role
	}

	boot, err := BootTime()
	if err == nil {
		ret.BootTime = boot
		ret.Uptime = uptime(boot)
	}

	if numProcs, err := common.NumProcs(); err == nil {
		ret.Procs = numProcs
	}

	sysProductUUID := common.HostSys("class/dmi/id/product_uuid")
	switch {
	case common.PathExists(sysProductUUID):
		lines, err := common.ReadLines(sysProductUUID)
		if err == nil && len(lines) > 0 && lines[0] != "" {
			ret.HostID = lines[0]
			break
		}
		fallthrough
	default:
		values, err := common.DoSysctrl("kernel.random.boot_id")
		if err == nil && len(values) == 1 && values[0] != "" {
			ret.HostID = values[0]
		}
	}

	return ret, nil
}

func BootTime() (uint64, error) {
	values, err := common.DoSysctrl("kern.boottime")
	if err != nil {
		return 0, err
	}
	// ex: { sec = 1392261637, usec = 627534 } Thu Feb 13 12:20:37 2014
	v := strings.Replace(values[2], ",", "", 1)
	boottime, err := strconv.ParseInt(v, 10, 64)
	if err != nil {
		return 0, err
	}

	return uint64(boottime), nil
}

func Info() (*InfoStat, error) {
	ret := &InfoStat{
		OS:             runtime.GOOS,
		PlatformFamily: "darwin",
	}

	hostname, err := os.Hostname()
	if err == nil {
		ret.Hostname = hostname
	}

	platform, family, version, err := PlatformInformation()
	if err == nil {
		ret.Platform = platform
		ret.PlatformFamily = family
		ret.PlatformVersion = version
		ret.KernelVersion = version
	}

	system, role, err := Virtualization()
	if err == nil {
		ret.VirtualizationSystem = system
		ret.VirtualizationRole = role
	}

	boot, err := BootTime()
	if err == nil {
		ret.BootTime = boot
		ret.Uptime = uptime(boot)
	}

	procs, err := process.Pids()
	if err == nil {
		ret.Procs = uint64(len(procs))
	}

	values, err := common.DoSysctrl("kern.uuid")
	if err == nil && len(values) == 1 && values[0] != "" {
		ret.HostID = values[0]
	}

	return ret, nil
}

// SwapMemory returns swapinfo.
func SwapMemory() (*SwapMemoryStat, error) {
	var ret *SwapMemoryStat

	swapUsage, err := common.DoSysctrl("vm.swapusage")
	if err != nil {
		return ret, err
	}

	total := strings.Replace(swapUsage[2], "M", "", 1)
	used := strings.Replace(swapUsage[5], "M", "", 1)
	free := strings.Replace(swapUsage[8], "M", "", 1)

	total_v, err := strconv.ParseFloat(total, 64)
	if err != nil {
		return nil, err
	}
	used_v, err := strconv.ParseFloat(used, 64)
	if err != nil {
		return nil, err
	}
	free_v, err := strconv.ParseFloat(free, 64)
	if err != nil {
		return nil, err
	}

	u := float64(0)
	if total_v != 0 {
		u = ((total_v - free_v) / total_v) * 100.0
	}

	// vm.swapusage shows "M", multiply 1000
	ret = &SwapMemoryStat{
		Total:       uint64(total_v * 1000),
		Used:        uint64(used_v * 1000),
		Free:        uint64(free_v * 1000),
		UsedPercent: u,
	}

	return ret, nil
}

func VirtualMemory() (*VirtualMemoryStat, error) {
	pageSize, err := common.DoSysctrl("vm.stats.vm.v_page_size")
	if err != nil {
		return nil, err
	}
	p, err := strconv.ParseUint(pageSize[0], 10, 64)
	if err != nil {
		return nil, err
	}

	pageCount, err := common.DoSysctrl("vm.stats.vm.v_page_count")
	if err != nil {
		return nil, err
	}
	free, err := common.DoSysctrl("vm.stats.vm.v_free_count")
	if err != nil {
		return nil, err
	}
	active, err := common.DoSysctrl("vm.stats.vm.v_active_count")
	if err != nil {
		return nil, err
	}
	inactive, err := common.DoSysctrl("vm.stats.vm.v_inactive_count")
	if err != nil {
		return nil, err
	}
	cache, err := common.DoSysctrl("vm.stats.vm.v_cache_count")
	if err != nil {
		return nil, err
	}
	buffer, err := common.DoSysctrl("vfs.bufspace")
	if err != nil {
		return nil, err
	}
	wired, err := common.DoSysctrl("vm.stats.vm.v_wire_count")
	if err != nil {
		return nil, err
	}

	parsed := make([]uint64, 0, 7)
	vv := []string{
		pageCount[0],
		free[0],
		active[0],
		inactive[0],
		cache[0],
		buffer[0],
		wired[0],
	}
	for _, target := range vv {
		t, err := strconv.ParseUint(target, 10, 64)
		if err != nil {
			return nil, err
		}
		parsed = append(parsed, t)
	}

	ret := &VirtualMemoryStat{
		Total:    parsed[0] * p,
		Free:     parsed[1] * p,
		Active:   parsed[2] * p,
		Inactive: parsed[3] * p,
		Cached:   parsed[4] * p,
		Buffers:  parsed[5],
		Wired:    parsed[6] * p,
	}

	ret.Available = ret.Inactive + ret.Cached + ret.Free
	ret.Used = ret.Active + ret.Wired + ret.Cached
	ret.UsedPercent = float64(ret.Total-ret.Available) / float64(ret.Total) * 100.0

	return ret, nil
}