#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <time.h>
#include <string.h>
#include <stdbool.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <sys/mman.h>
#define MSGLEN (16)

void checker(bool exp, const char *usrmsg, const char *file, const char *func, const int line){
    if(!(exp)){
        perror(usrmsg);
        fprintf(stderr, "%s %s %d\n", file, func, line);
        exit(EXIT_FAILURE);
    }
}
#define osAssert(exp, usrmsg) checker(exp, usrmsg, __FILE__, __func__, __LINE__);

void *osCreateMemoryBlock(char *name, unsigned size){
    mode_t mod = 0600;
    int memFD = shm_open(name, O_CREAT | O_RDWR, mod);
    osAssert(-1 != memFD, "shm open failed");
    osAssert(-1 != ftruncate(memFD, size), "ftrunc failed");
    void *address;
    osAssert(MAP_FAILED != (address = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, memFD, 0)), "map failed");
    close(memFD);
    return address;

}

int main(int argc, char **argv){
    osAssert(3<argc, "nema argumenta");
    int memSize = (argc-2)*sizeof(int);
    int *array = osCreateMemoryBlock(argv[1], memSize);
    for(int i=2;i<argc; i++){
        array[i-2] = atoi(argv[i]);
    }
    osAssert(-1 != munmap(array, memSize), "unmap failed");
    return 0;

}