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signal_ex2.go
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signal_ex2.go
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// refer to https://cloud.tencent.com/developer/article/1645996
package main
import (
"fmt"
"os"
"os/signal"
"syscall"
"time"
)
func main() {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT, syscall.SIGUSR1, syscall.SIGUSR2)
go func() {
for s := range ch {
switch s {
case syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT:
fmt.Println("Program Exit...", s)
GracefullExit()
case syscall.SIGUSR1:
fmt.Println("usr1 signal", s)
case syscall.SIGUSR2:
fmt.Println("usr2 signal", s)
default:
fmt.Println("other signal", s)
}
}
}()
fmt.Println("Program Start...")
sum := 0
for {
sum++
fmt.Println("sum:", sum)
time.Sleep(time.Second)
}
fmt.Println("bye")
}
func GracefullExit() {
fmt.Println("Start Exit...")
fmt.Println("Execute Clean...")
fmt.Println("End Exit...")
os.Exit(0)
}
/* try command:
killall -SIGINT signal_ex2
killall -SIGTERM signal_ex2
killall -SIGUSR1 signal_ex2
killall -SIGUSR2 signal_ex2
*/