not_shared.c

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include "error.h"

int main(void)
{
    int i;
    int pid;

    i = 1;

    if ((pid = fork()) < 0) {
        err_sys("fork");
    }
    else if ( pid == 0 ) {
        i++; // not shared with the parent proc
        exit(EXIT_SUCCESS);
    }
    waitpid(pid, NULL, 0);
   
    printf("i=%d\n", i); // 1
    return EXIT_SUCCESS;
}