SISTC Fork

// exame de recurso (parte a): 2009-09-29
// exercicio 2: fork, output de valores

// Apple Xcode
// paulogp


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

int main (int argc, const char * argv[])
{
    pid_t pid;
    int counter = 5;
    int *p = &counter;
    pid = fork();

    if (pid == 0)
    {
        printf("%d\n", counter);
        *p = 1;
        printf("%d\n", counter);
    }
    else
    {
        wait(NULL);
        printf("%d\n", *p);
    }

    return 0;
}


/* output
5
1
5
*/