#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/wait.h>

int main(int argc, char *argv[]){
  int nbGenerations;
  int i;
  int rc;
  int status;

  if (argc != 2){
    fprintf(stderr, "USAGE = descendance nbGenerations\n");
    return EXIT_FAILURE;
  }
  nbGenerations = atoi(argv[1]);

  /* On cree les generations */
  for (i=1 ; i<=nbGenerations ; i++){
    rc = fork();
    if (rc == 0){
      printf("Generation %d : enfant de pid %d ayant pour parent le processus de pid %d\n", i, getpid(), getppid());
    }else if (rc > 0){
      rc = wait(&status);
      break; /* Cela permet de sortir du for */
    }else{
      perror("Souci de fork");
      return EXIT_FAILURE;
    }
  }

  return EXIT_SUCCESS;
}