change to use sysctl machdep.cpu. for CpuInfo on darwin.

cpu_darwin.go

@@ -3,7 +3,7 @@
 package gopsutil
 
 import (
-	"regexp"
+	"os/exec"
 	"strconv"
 	"strings"
 )
@@ -53,34 +53,45 @@ func CPUTimes(percpu bool) ([]CPUTimesStat, error) {
 
 // Returns only one CPUInfoStat on FreeBSD
 func CPUInfo() ([]CPUInfoStat, error) {
-	filename := "/var/run/dmesg.boot"
-	lines, _ := readLines(filename)
-
 	var ret []CPUInfoStat
 
+	out, err := exec.Command("/usr/sbin/sysctl", "machdep.cpu").Output()
+	if err != nil {
+		return ret, err
+	}
+
 	c := CPUInfoStat{}
-	for _, line := range lines {
-		if matches := regexp.MustCompile(`CPU:\s+(.+) \(([\d.]+).+\)`).FindStringSubmatch(line); matches != nil {
-			c.ModelName = matches[1]
-			c.Mhz = mustParseFloat64(matches[2])
-		} else if matches := regexp.MustCompile(`Origin = "(.+)"  Id = (.+)  Family = (.+)  Model = (.+)  Stepping = (.+)`).FindStringSubmatch(line); matches != nil {
-			c.VendorID = matches[1]
-			c.Family = matches[3]
-			c.Model = matches[4]
-			c.Stepping = mustParseInt32(matches[5])
-		} else if matches := regexp.MustCompile(`Features=.+<(.+)>`).FindStringSubmatch(line); matches != nil {
-			for _, v := range strings.Split(matches[1], ",") {
+	for _, line := range strings.Split(string(out), "\n") {
+		values := strings.Fields(line)
+
+		if strings.HasPrefix(line, "machdep.cpu.brand_string") {
+			c.ModelName = strings.Join(values[1:], " ")
+		} else if strings.HasPrefix(line, "machdep.cpu.family") {
+			c.Family = values[1]
+		} else if strings.HasPrefix(line, "machdep.cpu.model") {
+			c.Model = values[1]
+		} else if strings.HasPrefix(line, "machdep.cpu.stepping") {
+			c.Stepping = mustParseInt32(values[1])
+		} else if strings.HasPrefix(line, "machdep.cpu.features") {
+			for _, v := range values[1:] {
+				c.Flags = append(c.Flags, strings.ToLower(v))
+			}
+		} else if strings.HasPrefix(line, "machdep.cpu.leaf7_features") {
+			for _, v := range values[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], ",") {
+		} else if strings.HasPrefix(line, "machdep.cpu.extfeatures") {
+			for _, v := range values[1:] {
 				c.Flags = append(c.Flags, strings.ToLower(v))
 			}
-		} else if matches := regexp.MustCompile(`Logical CPUs per core: (\d+)`).FindStringSubmatch(line); matches != nil {
-			// FIXME: no this line?
-			c.Cores = mustParseInt32(matches[1])
+		} else if strings.HasPrefix(line, "machdep.cpu.core_count") {
+			c.Cores = mustParseInt32(values[1])
 		}
 
+		// TODO:
+		// c.Mhz = mustParseFloat64(values[1])
+		//			c.VendorID = matches[1]
+
 	}
 
 	return append(ret, c), nil