Prevent shell from sending signals to children and detect if signals caught

interrupted.go

package main

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

func interrupted(sigCh <-chan os.Signal) bool {
	// non-blocking read on channel
	select {
	case <-sigCh:
	default:
		return false // channel is empty
	}
	return true
}

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

	fmt.Println("about to sleep")
	startTime := time.Now()

	cmd := exec.Command("sleep", "5")
	// prevent the shell from signalling children https://stackoverflow.com/a/33171307
	cmd.SysProcAttr = &syscall.SysProcAttr{
		Setpgid: true,
	}
	cmd.Run()

	fmt.Printf("slept for %0.0f sec\n", time.Now().Sub(startTime).Seconds())

	if interrupted(sigCh) {
		fmt.Println("interrupted")
	} else {
		fmt.Println("not interrupted")
	}
}

run

$ go run interrupted.go 
about to sleep
^C^C^C
slept for 5 sec
interrupted

$ go run interrupted.go 
about to sleep
slept for 5 sec
not interrupted