1static gboolean 2meta_window_update_snap_id (MetaWindow *window, 3                            uint32_t    pid) 4{ 5  g_autofree char *security_label_filename = NULL; 6  g_autofree char *security_label_contents = NULL; 7  gsize i, security_label_contents_size = 0; 8  char *contents_start; 9  char *contents_end;10  char *sandboxed_app_id;1112  g_return_val_if_fail (pid != 0, FALSE);13  g_return_val_if_fail (window->sandboxed_app_id == NULL, FALSE);1415  security_label_filename = g_strdup_printf ("/proc/%u/attr/current", pid);1617  if (!g_file_get_contents (security_label_filename,18                            &security_label_contents,19                            &security_label_contents_size,20                            NULL))21    return FALSE;2223  if (!g_str_has_prefix (security_label_contents, SNAP_SECURITY_LABEL_PREFIX))24    return FALSE;2526  /* We need to translate the security profile into the desktop-id.27   * The profile is in the form of 'snap.name-space.binary-name (current)'28   * while the desktop id will be name-space_binary-name.29   */30  security_label_contents_size -= sizeof (SNAP_SECURITY_LABEL_PREFIX) - 1;31  contents_start = security_label_contents + sizeof (SNAP_SECURITY_LABEL_PREFIX) - 1;32  contents_end = strchr (contents_start, ' ');3334  if (contents_end)35    security_label_contents_size = contents_end - contents_start;3637  for (i = 0; i < security_label_contents_size; ++i)38    {39      if (contents_start[i] == '.')40        contents_start[i] = '_';41    }4243  sandboxed_app_id = g_malloc0 (security_label_contents_size + 1);44  memcpy (sandboxed_app_id, contents_start, security_label_contents_size);4546  window->sandboxed_app_id = sandboxed_app_id;4748  return TRUE;49}