39 lines
1.0 KiB
Go
39 lines
1.0 KiB
Go
// Sometimes we'd like our Go programs to intelligently
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// handle [Unix signals](http://en.wikipedia.org/wiki/Unix_signal).
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// For example, we might want a server to gracefully
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// shutdown when it receives a `SIGTERM`, or a command-line
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// tool to stop processing input if it receives a `SIGINT`.
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// Here's how to handle signals in Go with channels.
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package main
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import (
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"fmt"
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"os"
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"os/signal"
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"syscall"
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)
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func main() {
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// Go signal notification works by sending `os.Signal`
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// values on a channel. We'll create a channel to
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// receive these notifications.
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// **Note:** this channel is "buffered".
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sigs := make(chan os.Signal, 1)
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// `signal.Notify` registers the given channel to
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// receive notifications of the specified signals.
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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fmt.Println("awaiting signal")
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// The `sigs` channel being buffered, the program
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// will wait here until it gets the expected signal and
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// then exit.
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sig := <-sigs
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fmt.Println()
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fmt.Println(sig)
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fmt.Println("exiting")
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}
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