#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <sys/mman.h>
//mmap-9-cli.c
int main (int argc, char *argv[]) {
    const char * shm_name  = "mymem";
    const int SIZE = 4096;
    int i, fd;
    void * ptr;
    fd = shm_open(shm_name, O_RDONLY, 0666);
    if(fd==1){
		printf("Errore in shm_open\n");
		exit(1);
    }
    ptr = mmap(0, SIZE, PROT_READ, MAP_SHARED, fd, 0);
    if (ptr == MAP_FAILED) {
        printf("Errore in mmap\n");
        return(1);
    }
    printf("%s", (char*) ptr);
    if(shm_unlink(shm_name)==1){
		printf("Errore in unlink %s\n", shm_name);
		exit(1);
    }
    return 0;
}