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#include <stdio.h>
#include <sys/shm.h>
#include <sys/stat.h>

int main(){
int segment_id;
//int *shared_memory;
struct shmid_ds shmbuffer;
int segment_size;
const int shared_segment_size = 0x6400;

typedef struct struct_kamion{
int id;
int kolik;
};
struct_kamion pole_kamionu[2];

struct_kamion *shared_memory;

struct_kamion kamion = {1111,1};
pole_kamionu[0] = kamion;
struct_kamion kamion2 = {2222,2};
pole_kamionu[1] = kamion2;
/* Alokovani sdileneho pametoveno segmentu */
segment_id = shmget(IPC_PRIVATE, shared_segment_size, IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR);

/* Pripojeni sdileneho segmentu */
shared_memory = (struct_kamion *) shmat(segment_id, NULL, NULL);
printf("sdilena pamet byla pripojena na adresu %p\n", shared_memory);
/* Urceni velikosti segmentu */
shmctl(segment_id, IPC_STAT, &shmbuffer);
segment_size = shmbuffer.shm_segsz;
printf("velikost segmentu: %d\n", segment_size);
/* Zapsani retezce do sdileneho pametoveho segmentu */
shared_memory[0] = pole_kamionu[0];
//shared_memory->id = pole_kamionu[0].id;  

//sprintf(shared_memory, 23);
/* Odpojeni pametoveho segmentu */
shmdt(shared_memory);

/* Nove pripojeni sdileneho segmentu( na urcitou adresu) */
shared_memory = (struct_kamion*) shmat(segment_id, (void *) 0x5000000, NULL);
printf("sdilena pamet byla pripojena na adresu %p\n", shared_memory);
/* Vypis retezce ze sdilene pameti */
int idKamionu = 4;//shared_memory->id;
printf("%d\n", idKamionu);
/* Odpojeni segmentu */
shmdt(shared_memory);

/* Dealokovani sdileneho pametoveho segmentu */
shmctl(segment_id, IPC_RMID, NULL);

return(0);
}