C++ (Cpp) grub_make_system_path_relative_to_its_root Examples

Example #1

File: blocklist.c Project: 376473984/TrustedGRUB2

void
grub_install_get_blocklist (grub_device_t root_dev,
			    const char *core_path, const char *core_img,
			    size_t core_size,
			    void (*callback) (grub_disk_addr_t sector,
					      unsigned offset,
					      unsigned length,
					      void *data),
			    void *hook_data)
{
  int i;
  char *tmp_img;
  char *core_path_dev;

  core_path_dev = grub_make_system_path_relative_to_its_root (core_path);

  /* Make sure that GRUB reads the identical image as the OS.  */
  tmp_img = xmalloc (core_size);

  for (i = 0; i < MAX_TRIES; i++)
    {
      grub_file_t file;

      grub_util_info ((i == 0) ? _("attempting to read the core image `%s' from GRUB")
		      : _("attempting to read the core image `%s' from GRUB again"),
		      core_path_dev);

      grub_disk_cache_invalidate_all ();

      grub_file_filter_disable_compression ();
      file = grub_file_open (core_path_dev);
      if (file)
	{
	  if (grub_file_size (file) != core_size)
	    grub_util_info ("succeeded in opening the core image but the size is different (%d != %d)",
			    (int) grub_file_size (file), (int) core_size);
	  else if (grub_file_read (file, tmp_img, core_size)
		   != (grub_ssize_t) core_size)
	    grub_util_info ("succeeded in opening the core image but cannot read %d bytes",
			    (int) core_size);
	  else if (memcmp (core_img, tmp_img, core_size) != 0)
	    {
#if 0
	      FILE *dump;
	      FILE *dump2;

	      dump = fopen ("dump.img", "wb");
	      if (dump)
		{
		  fwrite (tmp_img, 1, core_size, dump);
		  fclose (dump);
		}

	      dump2 = fopen ("dump2.img", "wb");
	      if (dump2)
		{
		  fwrite (core_img, 1, core_size, dump2);
		  fclose (dump2);
		}

#endif
	      grub_util_info ("succeeded in opening the core image but the data is different");
	    }
	  else
	    {
	      grub_file_close (file);
	      break;
	    }

	  grub_file_close (file);
	}
      else
	grub_util_info ("couldn't open the core image");

      if (grub_errno)
	grub_util_info ("error message = %s", grub_errmsg);

      grub_errno = GRUB_ERR_NONE;
      grub_util_biosdisk_flush (root_dev->disk);
      sleep (1);
    }

  if (i == MAX_TRIES)
    grub_util_error (_("cannot read `%s' correctly"), core_path_dev);

  grub_file_t file;
  /* Now read the core image to determine where the sectors are.  */
  grub_file_filter_disable_compression ();
  file = grub_file_open (core_path_dev);
  if (! file)
    grub_util_error ("%s", grub_errmsg);

  file->read_hook = callback;
  file->read_hook_data = hook_data;
  if (grub_file_read (file, tmp_img, core_size) != (grub_ssize_t) core_size)
    grub_util_error ("%s", _("failed to read the sectors of the core image"));

  grub_file_close (file);
  free (tmp_img);

  free (core_path_dev);
}

Example #2

File: main.c Project: remfalc/vyt-vyatta-grub

int
main (int argc, char *argv[])
{
  char *root_dev = 0;
  char *dir = DEFAULT_DIRECTORY;
  char *dev_map = DEFAULT_DEVICE_MAP;
  volatile int hold = 0;
  int opt;

  set_program_name (argv[0]);

  while ((opt = getopt_long (argc, argv, "r:d:m:vH:hV", options, 0)) != -1)
    switch (opt)
      {
      case 'r':
        root_dev = optarg;
        break;
      case 'd':
        dir = optarg;
        break;
      case 'm':
        dev_map = optarg;
        break;
      case 'v':
        verbosity++;
        break;
      case 'H':
        hold = (optarg ? atoi (optarg) : -1);
        break;
      case 'h':
        return usage (0);
      case 'V':
        printf ("%s (%s) %s\n", program_name, PACKAGE_NAME, PACKAGE_VERSION);
        return 0;
      default:
        return usage (1);
      }

  if (optind < argc)
    {
      fprintf (stderr, "Unknown extra argument `%s'.\n", argv[optind]);
      return usage (1);
    }

  /* Wait until the ARGS.HOLD variable is cleared by an attached debugger. */
  if (hold && verbosity > 0)
    printf ("Run \"gdb %s %d\", and set ARGS.HOLD to zero.\n",
            program_name, (int) getpid ());
  while (hold)
    {
      if (hold > 0)
        hold--;

      sleep (1);
    }

  signal (SIGINT, SIG_IGN);
  grub_console_init ();
  grub_host_init ();
  grub_hostfs_init ();

  /* XXX: This is a bit unportable.  */
  grub_util_biosdisk_init (dev_map);

#if GRUB_NO_MODULES
  grub_init_all ();
#endif

  /* Make sure that there is a root device.  */
  if (! root_dev)
    {
      char *device_name = grub_guess_root_device (dir);
      if (! device_name)
        grub_util_error ("cannot find a device for %s", dir);

      root_dev = grub_util_get_grub_dev (device_name);
      if (! root_dev)
	{
	  grub_util_info ("guessing the root device failed, because of `%s'",
			  grub_errmsg);
	  grub_util_error ("cannot guess the root device. Specify the option `--root-device'");
	}
    }

  if (strcmp (root_dev, "host") == 0)
    dir = xstrdup (dir);
  else
    dir = grub_make_system_path_relative_to_its_root (dir);
  prefix = xmalloc (strlen (root_dev) + 2 + strlen (dir) + 1);
  sprintf (prefix, "(%s)%s", root_dev, dir);
  free (dir);

  /* Start GRUB!  */
  if (setjmp (main_env) == 0)
    grub_main ();

#if GRUB_NO_MODULES
  grub_fini_all ();
#endif
  grub_hostfs_fini ();
  grub_host_fini ();

  grub_machine_fini ();

  return 0;
}