#include <sys/wait.h>
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>

int main() {
	int shmd = shm_open("/shm", O_RDWR | O_TRUNC | O_CREAT, 0755);
	ftruncate(shmd, sizeof(int[20]));
	int* memory = mmap(NULL, sizeof(int[20]), PROT_READ | PROT_WRITE, MAP_SHARED, shmd, 0);

	srand(time(NULL));
	for (int i = 0; i < 20; i++) {
		memory[i] = rand() % 100;
	}

	int fod = fork();
	if (fod == 0) {
		for (int i = 0; i < 20; i++) {
			for (int j = 0; j < 20; j++) {
				if (memory[i] < memory[j]) {
					int temp = memory[i];
					memory[i] = memory[j];
					memory[j] = temp;
				}
			}
		}
	}
	else {
		while (!waitpid(fod, NULL, WNOHANG)) {
			for (int i = 0; i < 20; i++) {
				printf("%d ", memory[i]);
			}
			printf("\n");
		}
	}

	munmap(memory, sizeof(int[20]));
	close(shmd);
	if (fod != 0)
		shm_unlink("/shm");

	return 0;
}