#include <stdio.h>
#include <stdbool.h>
#include <signal.h>
#include <unistd.h>


/* signal handler */
void handleUSR1(int sig){  
	fprintf(stdout, "signal SIGUSR1 with signum=%d received", sig);
}



int main(int argc, char* argv[]){

	signal(SIGUSR1,handleUSR1);  /* install handler */ 


	int count = 0;
	while (true){
		fprintf(stderr, ".");
		sleep(1);
	}
}