#include <stdio.h>
#include <signal.h>
#include <stdlib.h>

typedef void (*sig_handler) (int);
void
kill_me(int s) {
	puts("\n\nGoodbye cruel world...\n");
	exit(99);
}

int
change_signal(int sig, sig_handler handler) {
	struct sigaction action = {
		.sa_handler = handler,
		.sa_flags = 0,
	};

	sigemptyset(&action.sa_mask);
	return sigaction(sig, &action, NULL);
}

int
main(void) {
	char name[30];

	if (change_signal(SIGINT, kill_me) < 0) {
		fprintf(stderr, "Couldn't change SIGINT action\n");
		exit(1);
	}

	printf("Enter your name: ");
	fgets(name, 30, stdin);
	printf("Hello %s\n", name);
	return 0;
}