Listen to OS signals (Ctrl+C to exit)

In this example , we create a channel called signalChannel to receive OS signals. We then use signal.Notify to notify the channel when an interrupt (Ctrl+C) or termination signal (SIGTERM) is received.

The program will block at <-signalChannel, waiting for a signal to be received. Once a signal is received, it will continue executing, and you can handle the signal as needed. In the example, we simply print a message and exit the program, but you can perform any cleanup or necessary actions before exiting.

package main

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

func main() {
    // Create a channel to receive OS signals
    signalChannel := make(chan os.Signal, 1)

    // Notify the channel when an interrupt or termination signal is received
    signal.Notify(signalChannel, os.Interrupt, syscall.SIGTERM)

    fmt.Println("Press Ctrl+C to exit.")

    go func() {
        <-signalChannel
        // cleanup()
        fmt.Println("exiting gracefully...")
        os.Exit(0)

    }()

    // app running
    for {
        time.Sleep(time.Second * 10)
    }

}