example -- fork()

example -- fork()

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

int main(){
    int pid1;
    int pid2;    

    printf("My 1st fork example.\n");
    printf("-----------------------\n");
    printf("-----------------------");
    if((pid1 = fork()) == 0){
        printf("I am child, my ID is %d, my parent's ID is %d.\n", pid1, getppid());
        sleep(2);
    }
    else if((pid2 = fork()) == 0)
        printf("I am another child, my real ID is %d, however, I return as %d.\n", getpid(), pid2);
    else{
        printf("I am Daddy. My children's ID is %d and %d\n", pid1, pid2);
        sleep(3);
    }
    printf("test complete.\n");
    return 0;
}