My codes:

package main

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

func f() {
    // Simulating a function that might take some time to complete
    fmt.Println("Function f is starting")
    time.Sleep(5 * time.Second) // Simulate work
    fmt.Println("Function f is completed")
    return
}

func test() {
    // Setting up a channel to listen to signals
    sigChan := make(chan os.Signal, 1)
    signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)

    // Channel to control the termination of the main loop
    done := make(chan bool, 1)
    done2 := make(chan bool, 1)
    go func() {
        sig := <-sigChan
        fmt.Printf("Received signal: %v, waiting for function f to finishn", sig)
        done <- true
        done2 <- true
    }()

    go func() {
        for {
            select {
            case <-done2:
                fmt.Println("Exiting service status reporting loop of Pipeline")
                return
            default:
                fmt.Println("reporting start")
                time.Sleep(5 * time.Second)
                fmt.Println("reporting end")
            }
        }
    }()

    for {
        select {
        case <-done:
            fmt.Println("Exiting main loop")
            //forever <- struct{}{}
            return
        default:
            f()
        }
    }
    fmt.Println("all done.........")
}

func main() {
    test()
}

i hope ctrl+C can stop the main for loop and the for loop in the goroutine.
but it seems that “all done……..” never printed out.

any idea? thanks