signal.go

package main

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

func main() {
	for {
		fmt.Println("(main) ^o^ < ｼｮｷｶｰ")

		wg := new(sync.WaitGroup)

		cy := run(wg)

		cx := make(chan os.Signal, 1)
		signal.Notify(cx, syscall.SIGURG, syscall.SIGPIPE)

		fmt.Println("(main) ^o^ < channel ﾏｯﾃﾙｰ")
		select {
		case sig := <-cx:
			fmt.Println("(main) ^o^ <", sig)
			cy <- true
			break
		case <-cy:
			fmt.Println("(main) ^o^ < ｵﾜﾙｰ")
			break
		}

		wg.Wait()
	}
}

func run(wg *sync.WaitGroup) chan bool {
	fmt.Println("(run) ^o^ < run() ﾅｳ!")

	defer fmt.Println("(run) ^o^ < run() ﾇｹﾀｰ")

	c := make(chan bool)

	wg.Add(1)
	go func() {
		rand.Seed(time.Now().Unix())

		for {
			select {
			case <-c:
				fmt.Println("(nameless func) ^o^ < ｵﾜﾙｰ")
				goto End
			default:
				n := rand.Intn(10)
				fmt.Println("(nameless func) ^o^ < ", n)

				if n == 0 {
					fmt.Println("(nameless func) ^o^ < ﾅﾝｶｼｯﾊﾟｲｼﾀｰ")
					c <- true
					goto End
				} else {
					fmt.Println("(nameless func) ^o^ < ﾅﾝｶｼｮﾘｼﾃﾙｰ")
					time.Sleep(10 * time.Second)
				}
			}
		}

	End:
		wg.Done()
	}()

	return c
}