golang Method to prevent the main goroutine from exiting

Prevent groutine from exiting by means of system signal 

package main

import (
    "runtime"
    "sync"
    "os"
    "os/signal"
    "syscall"
    "fmt"
)

func main() {
    runtime.GOMAXPROCS(runtime.NumCPU())
    wg := &sync.WaitGroup{}
    c := make(chan os.Signal, 1)
    signal.Notify(c, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT)
    go func() {
        sig := <-c
        _ = sig
        wg.Done()
    }()
    wg.Add(1)
    fmt.Println("执行任务～～～")
    wg.Wait()
    fmt.Printf("结束")
}