Can Go's `defer` Function Handle SIGINT for Clean Program Termination?

Trapping SIGINT with Defer Functions

Question: Is it possible to handle the Ctrl C (SIGINT) signal and execute a cleanup function before program termination?

Answer:

Yes, you can capture the SIGINT signal and execute a cleanup function in a "defer" fashion using the os/signal package in Go.

The signal.Notify function allows you to register a channel to receive notifications about specific signals, such as os.Interrupt (which represents the SIGINT signal generated by Ctrl C):

c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)

Next, start a goroutine that waits for incoming signals:

go func(){
    for sig := range c {
        // Handle the sig interruption
    }
}()

Inside the goroutine, you can perform any necessary cleanup actions when the SIGINT signal is received.

The manner in which you terminate the program and print information is determined by your specific implementation. You have complete control over how the cleanup function operates and what actions it performs.

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