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#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;
}
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