linux: 通过go语言获得系统进程cpu使用情况
2017-12-21 本文已影响17人
随风化作雨
package main
import (
"bytes"
//"fmt"
"log"
"os/exec"
"strconv"
"strings"
)
type Process struct {
pid int
cpu float64
}
func main() {
cmd := exec.Command("ps", "aux")
var out bytes.Buffer
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
log.Fatal(err)
}
processes := make([]*Process, 0)
for {
line, err := out.ReadString('\n')
if err != nil {
break
}
tokens := strings.Split(line, " ")
ft := make([]string, 0)
for _, t := range tokens {
if t != "" && t != "\t" {
ft = append(ft, t)
}
}
log.Println(len(ft), ft)
pid, err := strconv.Atoi(ft[1])
if err != nil {
continue
}
cpu, err := strconv.ParseFloat(ft[2], 64)
if err != nil {
log.Fatal(err)
}
processes = append(processes, &Process{pid, cpu})
}
for _, p := range processes {
log.Println("Process ", p.pid, " takes ", p.cpu, " % of the CPU")
}
}