Function check_temp_dir

sql/slave.cc:5006–5058

static int check_temp_dir_result= 0;

static 
int check_temp_dir(char* tmp_file)
{
  File fd;
  int result= 1;                                // Assume failure
  MY_DIR *dirp;
  char tmp_dir[FN_REFLEN];
  size_t tmp_dir_size;
  DBUG_ENTER("check_temp_dir");

  /* This look is safe to use as this function is only called once */
  mysql_mutex_lock(&LOCK_start_thread);
  if (check_temp_dir_run)
  {
    if ((result= check_temp_dir_result))
      my_message(result, tmp_file, MYF(0));
    goto end;
  }
  check_temp_dir_run= 1;

  /*
    Get the directory from the temporary file.
  */
  dirname_part(tmp_dir, tmp_file, &tmp_dir_size);

  /*
    Check if the directory exists.
   */
  if (!(dirp=my_dir(tmp_dir,MYF(MY_WME))))
    goto end;
  my_dirend(dirp);

  /*
    Check permissions to create a file. We use O_TRUNC to ensure that
    things works even if we happen to have and old file laying around.
   */
  if ((fd= mysql_file_create(key_file_misc,
                             tmp_file, CREATE_MODE,
                             O_WRONLY | O_BINARY | O_TRUNC | O_NOFOLLOW,
                             MYF(MY_WME))) < 0)
    goto end;

  result= 0;                                    // Directory name ok
  /*
    Clean up.
   */
  mysql_file_close(fd, MYF(0));
  mysql_file_delete(key_file_misc, tmp_file, MYF(0));

end:
  mysql_mutex_unlock(&LOCK_start_thread);
  DBUG_RETURN(result);
}


void