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


#define SHMKEY ((key_t) 9870)
#define SEMKEY1 ((key_t) 7980)
#define SEMKEY2 ((key_t) 7970)
#define PERMS 0666

#define BSIZE 32

typedef struct _buffer {
	char	data[BSIZE];		/* data buffer		*/
	int	size;			/* number of data bytes	*/
} BUFFER;