Signals

Context

The os/signal package allows Go programs to receive Unix signals (e.g., SIGINT, SIGTERM). This is used for graceful shutdown.

Example

Catch Ctrl+C and print a message before exiting.

Code example

package main

import (
    "fmt"
    "os"
    "os/signal"
    "syscall"
)

func main() {
    sigs := make(chan os.Signal, 1)
    signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)

    fmt.Println("Waiting for signal...")
    s := <-sigs
    fmt.Println("Received signal:", s)
}

Output (press Ctrl+C)

Waiting for signal...
^CReceived signal: interrupt

Useful links

• os/signal package
• Go by Example: Signals