// daffy.c
// by Michael Collins
//

#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>

int
main()
{
  key_t shkey;
  int   shared_id;
  char* sharedmem;

  shkey = ftok("/dev/null",'A'); // Get the key to the shared segment set up by Bugs
  if( (shared_id = shmget(shkey, 0, 0)) < 0) //Get the id for the shared segment
   perror(NULL);

  if( (sharedmem = shmat(shared_id, 0, 0)) < 0) //Map segment onto our virtual space
   perror(NULL);

  printf("Bugs says its %s\n", sharedmem);
  sprintf(sharedmem,"Rabbit Season");
  printf("But I, Daffy, say its %s\n", sharedmem);

  shmdt(sharedmem); //Unmap the shared segment
}