信号os.Interrupt和信号syscall.SIGTERM的应用

package main

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

func worker(stop <-chan bool) {
    for {
        select {
            case <-stop:
                fmt.Println("exit")
                return
            default:
                fmt.Println("running...")
                time.Sleep(3)
        }
    }
}

func main() {
    stop := make(chan bool)
    var wg sync.WaitGroup
    for i := 0; i < 3; i++ {
        wg.Add(1)
        go func(stop <-chan bool) {
            defer wg.Done()
          worker(stop)
        }(stop)
    }
    waitForSignal()
    close(stop)
    fmt.Println("stopping all job")
    wg.Wait()
}

func waitForSignal() {
    sigs := make(chan os.Signal)
    signal.Notify(sigs, os.Interrupt)
    signal.Notify(sigs, syscall.SIGTERM)
    
    //你看，这里是读管道，管道中为信号，如果该管道没有信号，则会卡在这里；
    fmt.Println(<-sigs)
}

运行结果

//pkill信号syscall.SIGTERM
running...
running...
running...
running...
terminated
running...
running...
stopping all job
exit
exit
exit

//或者ctrl+c信号os.Interrupt
running...
interrupt
stopping all job
running...
exit
exit
exit