Are all applications supposed to do something along the lines below, when saving a keyfile?

gchar *data;
gsize data_size;
    
if ((data = g_key_file_to_data (keyfile, &data_size, NULL))) {
  int fd;

  if ((fd = g_open (preset_path, O_WRONLY|O_CREAT|O_TRUNC))) {
    write(fd, data, data_size);
    close (fd);
  }
  g_free (data);
}

Shouldn't there be 
gboolean
g_key_file_save_to_file (GKeyFile       *key_file,
			   const gchar    *file,
			   GError        **error);
If yes, I can make a patch (adding g_file_error handling above).

Open question:
* do we have a policy for creating backup files (safe rename and create) or should this be left to the application?