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| package main
import (
"fmt"
"os"
"os/signal"
"syscall"
)
func main() {
TestSignal()
}
var firstSigusr1 = true
func TestSignal() {
// 忽略 Control-C (SIGINT)
// os.Interrupt 和 syscall.SIGINT 是同义词
signal.Ignore(os.Interrupt)
c1 := make(chan os.Signal, 2)
// Notify SIGHUP
signal.Notify(c1, syscall.SIGHUP)
// Notify SIGUSR1
signal.Notify(c1, syscall.SIGUSR1)
go func() {
for {
switch <-c1 {
case syscall.SIGHUP:
fmt.Println("sighup, reset sighup")
signal.Reset(syscall.SIGHUP)
case syscall.SIGUSR1:
if firstSigusr1 {
fmt.Println("first usr1, notify interrupt which had ignore!")
c2 := make(chan os.Signal, 1)
// Notify Interrupt
signal.Notify(c2, os.Interrupt)
go handlerInterrupt(c2)
}
}
}
}()
select {}
}
func handlerInterrupt(c <-chan os.Signal) {
for {
switch <-c {
case os.Interrupt:
fmt.Println("signal interrupt")
}
}
}
|
