程序接收退出信号安全退出

installSignal.go

package main

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

func main() {

	mainExitChan := make(chan int, 2)
	installSignal(mainExitChan)

	<-mainExitChan

	fmt.Println("exit")

}

func installSignal(mainExitChan chan int) {
	signalChan := make(chan os.Signal, 1)
	signalIgnoreChan := make(chan os.Signal, 1)
	go func() {
		for {
			select {
			case <-signalChan:
				mainExitChan <- 1
				return
			case <-signalIgnoreChan:
				continue
			}
		}
	}()
	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
	signal.Notify(signalIgnoreChan, syscall.SIGPIPE)
}