感谢@zh-five，在这里借鉴了他的项目代码
package main
import (
"flag"
ProcessManager "github.com/Apollo-Pro/process_manager"
"log"
"fmt"
"time"
)
func main() {
d := flag.Bool("d", false, "是否后台守护进程方式运行")
action := flag.String("a", "", "操作 start|stop|restart")
flag.Parse()
ProcessName := "test" //进程名称(暂时没用)
runtimePath := "./runtime" //运行目录，存放日志以及PID文件
processManager := ProcessManager.New(*d, ProcessName, runtimePath)
processManager.Daemon = true //守护进程
processManager.MaxCount = 2 //最大重启次数
startFunc := func(pid int) {
//程序入口代码
server(pid)
}
switch *action {
case "start":
//启动进程
processManager.Start(startFunc)
break
case "restart":
//重启进程
processManager.Restart(func() {
log.Printf("进程已退出")
}, startFunc)
break
case "stop":
//关闭进程
processManager.Stop(func() {
log.Printf("关闭成功")
})
break
case "status":
//关闭进程
running, pid := processManager.MainProcessIsRunning()
log.Printf("进程状态:%t,pid:%d", running, pid)
break
}
//操作结束
processManager.Check(func(pid int) {
log.Printf("启动成功:%d", pid)
})
//kill 掉指定文件中记录的pid
killRet, err := processManager.KillProcess("./app.pid")
fmt.Println(killRet, err)
//判断pid是否存活
isExist := ProcessManager.PidExist(88888)
fmt.Println(isExist)
//干掉指定pid
killErr := ProcessManager.Kill(88888)
fmt.Println(killErr)
}
func server(pid int) {
log.Println(pid, "start...")
time.Sleep(time.Second * 10)
log.Println(pid, "end")
}