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

int main(int argc, char *argv[]) {
    printf("In %s main\n", argv[0]);
    printf("P: my pid is %d.\n", getpid()); 
    printf("P: my parent is %d.\n", getppid());
    return 0;
}