char* fifo_name;
                for (i = 0; i < wnuk_ilosc; i++)
                {
                    wnuki[i] = fork();
                    if(wnuki[i]==-1)
                    {
                            perror("Fatal Error! - grand son's\t");
                            printf("errno = %d \n", errno);
                            exit(1);
                    }
                    else if (wnuki[i]==0)
                    {
                            fifo_name = (char*)malloc(6);
                            sprintf(fifo_name,"%d",i);

                            if(execl("./wnuk","wnuk",parm1,fifo_name,NULL)==-1)
                            {
                                perror("Fatal Error! - grand son's execl\t");
                                printf("errno = %d \n", errno);
                                exit(1);
                            }
                            exit(0);
                    }
                    else
                    {
                        sleep(10);
                        printf("jestem nowym !!!!!! i gine za 5 sec\n");
                        sleep(5);
                        exit(0);
                    }