问C语言-获取进程所有者

EN

sprintf(buffer, "%d", getpid());

if ((pid = fork()) == -1)
        exit(EXIT_FAILURE);
      else if (pid == 0)
        {
          dup2(fd,STDOUT_FILENO);
          dup2(fd,STDERR_FILENO);

          // function that Write in the file
          fdprintf(fd, "\n%s %s%d secondes %s\n", adornment, toShow, sec, adornment);

          if (execlp("ps", "u", buffer, NULL) == -1)
            show_err("Exelp Error\n");
        }                                                                                                                                                                                                        
      else
        {
          wait(NULL);
          fdprintf(fd, "%s %s%d secondes %s\n", adornment, toShow, sec, adornment);
          close(fd);
        }