有时我们希望Go程序能够智能地处理Unix信号。 例如，可能希望服务器在接收到SIGTERM时正常关闭，或者在收到SIGINT时使用命令行工具停止处理输入。下面介绍如何使用Go语言处理信号。
Go信号通知通过在通道上发送os.Signal值来工作。创建一个通道来接收这些通知(还会在程序退出时通知我们)。
所有的示例代码，都放在
F:\worksp\golang目录下。安装Go编程环境请参考：http://www.yiibai.com/go/go_environment.html
signal.go的完整代码如下所示 -
package main
import "fmt"
import "os"
import "os/signal"
import "syscall"
func main() {
// Go signal notification works by sending `os.Signal`
// values on a channel. We'll create a channel to
// receive these notifications (we'll also make one to
// notify us when the program can exit).
sigs := make(chan os.Signal, 1)
done := make(chan bool, 1)
// `signal.Notify` registers the given channel to
// receive notifications of the specified signals.
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
// This goroutine executes a blocking receive for
// signals. When it gets one it'll print it out
// and then notify the program that it can finish.
go func() {
sig := <-sigs
fmt.Println()
fmt.Println(sig)
done <- true
}()
// The program will wait here until it gets the
// expected signal (as indicated by the goroutine
// above sending a value on `done`) and then exit.
fmt.Println("awaiting signal")
<-done
fmt.Println("exiting")
}
执行上面代码，将得到以下输出结果 -
F:\worksp\golang>go run signal.go
awaiting signal
[Ctl+C]
interrupt
exiting
