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

int globvar = 6;

int main(void){
    int var;
    pid_t pid;

    var = 88;
    printf("before fork : \n");

    if ((pid = vfork()) < 0){
        printf("vfork error");
    }
    else if (pid == 0){
        globvar++;
        var++;
        _exit(0);
    }

    printf("pid = %ld, glob = %d, var = %d\n", (long)getpid(), globvar, var);

    exit(0);
}