# package signal
`import "os/signal"`
signal包實現了對輸入信號的訪問。
## Index
* [func Notify(c chan<- os.Signal, sig ...os.Signal)](#Notify)
* [func Stop(c chan<- os.Signal)](#Stop)
### Examples
* [Notify](#example-Notify)
## func [Notify](https://github.com/golang/go/blob/master/src/os/signal/signal.go#L49 "View Source")
```
func Notify(c chan<- os.Signal, sig ...os.Signal)
```
Notify函數讓signal包將輸入信號轉發到c。如果沒有列出要傳遞的信號,會將所有輸入信號傳遞到c;否則只傳遞列出的輸入信號。
signal包不會為了向c發送信息而阻塞(就是說如果發送時c阻塞了,signal包會直接放棄):調用者應該保證c有足夠的緩存空間可以跟上期望的信號頻率。對使用單一信號用于通知的通道,緩存為1就足夠了。
可以使用同一通道多次調用Notify:每一次都會擴展該通道接收的信號集。唯一從信號集去除信號的方法是調用Stop。可以使用同一信號和不同通道多次調用Notify:每一個通道都會獨立接收到該信號的一個拷貝。
Example
```
// Set up channel on which to send signal notifications.
// We must use a buffered channel or risk missing the signal
// if we're not ready to receive when the signal is sent.
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, os.Kill)
// Block until a signal is received.
s := <-c
fmt.Println("Got signal:", s)
```
## func [Stop](https://github.com/golang/go/blob/master/src/os/signal/signal.go#L93 "View Source")
```
func Stop(c chan<- os.Signal)
```
Stop函數讓signal包停止向c轉發信號。它會取消之前使用c調用的所有Notify的效果。當Stop返回后,會保證c不再接收到任何信號。
## Bugs
[?](https://github.com/golang/go/blob/master/src/os/signal/signal.go#L8 "View Source") 本包還沒在Plan 9上實現。
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