/* sigtalk.c Example of how 2 processes can talk */
/* compile with gcc: cc sigtalk.c -o sigtalk */ 

/* written by sHaDy */
/* NOTE: mmmhhh... se vi va mettete qualche commento al codice */


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


void sighup()

{  signal(SIGHUP,sighup); 
   printf("CHILD: I have received a SIGHUP\n");
}

void sigint()

{  signal(SIGINT,sigint); 
   printf("CHILD: I have received a SIGINT\n");
}

void sigquit()

{ printf("Ahi! Somebody has killed me!\n");
  exit(0);
}

void sighup(); 
void sigint();
void sigquit();

main()
{ int pid;

  
   if ((pid = fork()) < 0) {
        	perror("fork");
        	exit(1);
    }
    
   if (pid == 0)
     { 
       		signal(SIGHUP,sighup); 
       		signal(SIGINT,sigint);
       		signal(SIGQUIT, sigquit);
       		for(;;); 
     }
  else 
     {  
       		printf("\nPARENT: sending SIGHUP\n\n");
       		kill(pid,SIGHUP);
       		sleep(3); 
       		printf("\nPARENT: sending SIGINT\n\n");
       		kill(pid,SIGINT);
       		sleep(3); 
       		printf("\nPARENT: sending SIGQUIT\n\n");
       		kill(pid,SIGQUIT);
      		sleep(3); 

} 
}