/*
 * fork-test.c
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/wait.h>

int global_var = 0;

int
main(int argc, char *argv[])
{
    int local_var = 0;
    int *heap_var, *mmap_shared_var, *mmap_private_var;

    heap_var = (int *) malloc(sizeof(int));
    *heap_var = 0;

    mmap_private_var = (int *) mmap(NULL, sizeof(int), PROT_READ | PROT_WRITE,
            MAP_PRIVATE | MAP_ANON, -1, 0);
    *mmap_private_var = 0;

    mmap_shared_var = (int *) mmap(NULL, sizeof(int), PROT_READ | PROT_WRITE,
            MAP_SHARED | MAP_ANON, -1, 0);
    *mmap_shared_var = 0;

    if(fork()) {
        global_var = 12;
        local_var = 24;
        *heap_var = 36;
        *mmap_private_var = 48;
        *mmap_shared_var = 60;

        wait(NULL);
    } else {
        sleep(1);

        printf("global_var is       %d\n", global_var);
        printf("local_var is        %d\n", local_var);
        printf("heap_var is         %d\n", *heap_var);
        printf("mmap_private_var is %d\n", *mmap_private_var);
        printf("mmap_shared_var is  %d\n", *mmap_shared_var);
    }
}