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

int main(int argc, char *argv[]) {
  int codeTerm;
  pid_t pidFils, idFils;

  pidFils=fork();

  if (pidFils == -1) {
    printf("Erreur fork\n");
    exit(1);
  }

  if (pidFils == 0) {
    execl("/usr/bin/ls", "-l", NULL);
  } else {
    idFils=wait(&codeTerm);
    if (idFils == -1){
      perror("wait ");
      exit(2);
    }

    if (WEXITSTATUS(codeTerm) != 0) {
      printf("[%d] (%d)\n", WEXITSTATUS(codeTerm), idFils);
    }
  }

  return EXIT_SUCCESS;
}