Vendor psutils and remove neko

plugins/system/ps/mem/mem_darwin.go

@@ -0,0 +1,109 @@
+// +build darwin
+
+package mem
+
+import (
+	"os/exec"
+	"strconv"
+	"strings"
+
+	common "github.com/shirou/gopsutil/common"
+)
+
+func getPageSize() (uint64, error) {
+	out, err := exec.Command("pagesize").Output()
+	if err != nil {
+		return 0, err
+	}
+	o := strings.TrimSpace(string(out))
+	p, err := strconv.ParseUint(o, 10, 64)
+	if err != nil {
+		return 0, err
+	}
+
+	return p, nil
+}
+
+// VirtualMemory returns VirtualmemoryStat.
+func VirtualMemory() (*VirtualMemoryStat, error) {
+	p, err := getPageSize()
+	if err != nil {
+		return nil, err
+	}
+
+	total, err := common.DoSysctrl("hw.memsize")
+	if err != nil {
+		return nil, err
+	}
+	free, err := common.DoSysctrl("vm.page_free_count")
+	if err != nil {
+		return nil, err
+	}
+	parsed := make([]uint64, 0, 7)
+	vv := []string{
+		total[0],
+		free[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,
+	}
+
+	// TODO: platform independent (worked freebsd?)
+	ret.Available = ret.Free + ret.Buffers + ret.Cached
+
+	ret.Used = ret.Total - ret.Free
+	ret.UsedPercent = float64(ret.Total-ret.Available) / float64(ret.Total) * 100.0
+
+	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
+}