示例#1
0
static int
is_identifier_char (int c)
{
  return (c != -1
          && (grub_isalpha(c)
              || grub_isdigit(c)
              || c == '_'
              || c == '-'));
}
示例#2
0
文件: execute.c 项目: Spacy/grub-fuse
static int
grub_env_special (const char *name)
{
  if (grub_isdigit (name[0]) ||
      grub_strcmp (name, "#") == 0 ||
      grub_strcmp (name, "*") == 0 ||
      grub_strcmp (name, "@") == 0)
    return 1;
  return 0;
}
示例#3
0
/* Determines the state following STATE, determined by C.  */
grub_parser_state_t
grub_parser_cmdline_state (grub_parser_state_t state, char c, char *result)
{
  struct grub_parser_state_transition *transition;
  struct grub_parser_state_transition default_transition;

  default_transition.to_state = state;
  default_transition.keep_value = 1;

  /* Look for a good translation.  */
  for (transition = state_transitions; transition->from_state; transition++)
    {
      if (transition->from_state != state)
	continue;
      /* An exact match was found, use it.  */
      if (transition->input == c)
	break;

      if (grub_isspace (transition->input) && !grub_isalpha (c)
	  && !grub_isdigit (c) && c != '_')
	break;

      /* A less perfect match was found, use this one if no exact
         match can be found.  */
      if (transition->input == 0)
	break;
    }

  if (!transition->from_state)
    transition = &default_transition;

  if (transition->keep_value)
    *result = c;
  else
    *result = 0;
  return transition->to_state;
}
示例#4
0
char *
grub_legacy_parse (const char *buf, char **entryname, char **suffix)
{
  const char *ptr;
  const char *cmdname;
  unsigned i, cmdnum;
  char *args[ARRAY_SIZE (legacy_commands[0].argt)];

  *suffix = NULL;

  for (ptr = buf; *ptr && grub_isspace (*ptr); ptr++);
  if (!*ptr || *ptr == '#')
    {
      char *ret;
      int len = grub_strlen (buf);
      ret = grub_malloc (len + 2);
      grub_memcpy (ret, buf, len);
      if (len && ret[len - 1] == '\n')
	ret[len] = 0;
      else
	{
	  ret[len] = '\n';
	  ret[len + 1] = 0;
	}
      return ret;
    }

  cmdname = ptr;
  for (ptr = buf; *ptr && !grub_isspace (*ptr) && *ptr != '='; ptr++);

  for (cmdnum = 0; cmdnum < ARRAY_SIZE (legacy_commands); cmdnum++)
    if (grub_strncmp (legacy_commands[cmdnum].name, cmdname, ptr - cmdname) == 0
	&& legacy_commands[cmdnum].name[ptr - cmdname] == 0
	&& (!(*entryname != NULL && (legacy_commands[cmdnum].flags
				     & FLAG_NO_MENUENTRY)))
	&& (!(*entryname == NULL && (legacy_commands[cmdnum].flags
				     & FLAG_MENUENTRY_ONLY))))
      break;
  if (cmdnum == ARRAY_SIZE (legacy_commands))
    return grub_xasprintf ("# Unsupported legacy command: %s\n", buf);

  for (; grub_isspace (*ptr) || *ptr == '='; ptr++);

  if (legacy_commands[cmdnum].flags & FLAG_TITLE)
    {
      const char *ptr2;
      ptr2 = ptr + grub_strlen (ptr);
      while (ptr2 > ptr && grub_isspace (*(ptr2 - 1)))
	ptr2--;
      *entryname = grub_strndup (ptr, ptr2 - ptr);
      return NULL;
    }

  if (legacy_commands[cmdnum].flags & FLAG_TERMINAL)
    {
      int dumb = 0, lines = 24;
#ifdef TODO
      int no_echo = 0, no_edit = 0;
#endif
      int hercules = 0;
      int console = 0, serial = 0, graphics = 0;
      /* Big enough for any possible resulting command. */
      char outbuf[512] = "";
      char *outptr;
      while (*ptr)
	{
	  /*	  "[--timeout=SECS] [--silent]"
		  " [console] [serial] [hercules]"*/
	  if (grub_memcmp (ptr, "--dumb", sizeof ("--dumb") - 1) == 0)
	    dumb = 1;
#ifdef TODO
	  if (grub_memcmp (ptr, "--no-echo", sizeof ("--no-echo") - 1) == 0)
	    no_echo = 1;

	  if (grub_memcmp (ptr, "--no-edit", sizeof ("--no-edit") - 1) == 0)
	    no_edit = 1;
#endif
	  if (grub_memcmp (ptr, "--lines=", sizeof ("--lines=") - 1) == 0)
	    {
	      lines = grub_strtoul (ptr + sizeof ("--lines=") - 1, 0, 0);
	      if (grub_errno)
		{
		  lines = 24;
		  grub_errno = GRUB_ERR_NONE;
		}
	    }

	  if (grub_memcmp (ptr, "console", sizeof ("console") - 1) == 0)
	    console = 1;

	  if (grub_memcmp (ptr, "serial", sizeof ("serial") - 1) == 0)
	    serial = 1;
	  if (grub_memcmp (ptr, "hercules", sizeof ("hercules") - 1) == 0)
	    hercules = 1;
	  if (grub_memcmp (ptr, "graphics", sizeof ("graphics") - 1) == 0)
	    graphics = 1;
	  while (*ptr && !grub_isspace (*ptr))
	    ptr++;
	  while (*ptr && grub_isspace (*ptr))
	    ptr++;
	}

      if (!console && !serial && !hercules && !graphics)
	return grub_strdup ("terminal_input; terminal_output; terminfo\n");

      outptr = outbuf;

      if (graphics)
	outptr = grub_stpcpy (outptr, "insmod all_video; ");

      outptr = grub_stpcpy (outptr, "terminal_input ");
      if (serial)
	outptr = grub_stpcpy (outptr, "serial ");
      if (console || hercules || graphics)
	outptr = grub_stpcpy (outptr, "console ");
      outptr = grub_stpcpy (outptr, "; terminal_output ");
      if (serial)
	outptr = grub_stpcpy (outptr, "serial ");
      if (console)
	outptr = grub_stpcpy (outptr, "console ");
      if (hercules)
	outptr = grub_stpcpy (outptr, "mda_text ");
      if (graphics)
	outptr = grub_stpcpy (outptr, "gfxterm ");
      outptr = grub_stpcpy (outptr, "; ");
      *outptr = '\0';
      if (serial)
	{
	  grub_snprintf (outptr, outbuf + sizeof (outbuf) - outptr,
			 "terminfo serial -g 80x%d %s; ",
			 lines, dumb ? "dumb" : "vt100");
	  outptr += grub_strlen (outptr);
	}

      grub_strcpy (outptr, "\n");

      return grub_strdup (outbuf);
    }

  grub_memset (args, 0, sizeof (args));

  {
    int hold_arg = 0;
    const char *curarg = NULL; 
    for (i = 0; i < legacy_commands[cmdnum].argc; i++)
      {
 	grub_size_t curarglen;
	if (hold_arg)
	  {
	    ptr = curarg;
	    hold_arg = 0;
	  }
	for (; grub_isspace (*ptr); ptr++);
	curarg = ptr;
	if (!*curarg)
	  break;
	for (; *ptr && !grub_isspace (*ptr); ptr++);
	if (i != legacy_commands[cmdnum].argc - 1
	    || (legacy_commands[cmdnum].flags & FLAG_IGNORE_REST))
	  curarglen = ptr - curarg;
	else
	  {
	    curarglen = grub_strlen (curarg);
	    while (curarglen > 0 && grub_isspace (curarg[curarglen - 1]))
	      curarglen--;
	  }
	if (*ptr)
	  ptr++;
	switch (legacy_commands[cmdnum].argt[i])
	  {
	  case TYPE_FILE_NO_CONSUME:
	    hold_arg = 1;
	  case TYPE_PARTITION:
	  case TYPE_FILE:
	    args[i] = adjust_file (curarg, curarglen);
	    break;

	  case TYPE_REST_VERBATIM:
	    {
	      char *outptr, *outptr0;
	      int overhead = 3;
	      ptr = curarg;
	      while (*ptr)
		{
		  for (; *ptr && grub_isspace (*ptr); ptr++);
		  for (; *ptr && !grub_isspace (*ptr); ptr++)
		    if (*ptr == '\'')
		      overhead += 3;
		  if (*ptr)
		    ptr++;
		  overhead += 3;
		}
		
	      outptr0 = args[i] = grub_malloc (overhead + (ptr - curarg));
	      if (!outptr0)
		return NULL;
	      ptr = curarg;
	      outptr = outptr0;
	      while (*ptr)
		{
		  for (; *ptr && grub_isspace (*ptr); ptr++);
		  if (outptr != outptr0)
		    *outptr++ = ' ';
		  *outptr++ = '\'';
		  for (; *ptr && !grub_isspace (*ptr); ptr++)
		    {
		      if (*ptr == '\'')
			{
			  *outptr++ = '\'';
			  *outptr++ = '\\';
			  *outptr++ = '\'';
			  *outptr++ = '\'';
			}
		      else
			*outptr++ = *ptr;
		    }
		  *outptr++ = '\'';
		  if (*ptr)
		    ptr++;
		}
	      *outptr++ = 0;
	    }
	    break;

	  case TYPE_VERBATIM:
	    args[i] = grub_legacy_escape (curarg, curarglen);
	    break;
	  case TYPE_WITH_CONFIGFILE_OPTION:
	  case TYPE_FORCE_OPTION:
	  case TYPE_NOAPM_OPTION:
	  case TYPE_TYPE_OR_NOMEM_OPTION:
	  case TYPE_OPTION:
	    if (is_option (legacy_commands[cmdnum].argt[i], curarg, curarglen))
	      {
		args[i] = grub_strndup (curarg, curarglen);
		break;
	      }
	    args[i] = grub_strdup ("");
	    hold_arg = 1;
	    break;
	  case TYPE_INT:
	    {
	      const char *brk;
	      int base = 10;
	      brk = curarg;
	      if (brk[0] == '0' && brk[1] == 'x')
		{
		  base = 16;
		  brk += 2;
		}
	      else if (brk[0] == '0')
		base = 8;
	      for (; *brk && brk < curarg + curarglen; brk++)
		{
		  if (base == 8 &&  (*brk == '8' || *brk == '9'))
		    break;
		  if (grub_isdigit (*brk))
		    continue;
		  if (base != 16)
		    break;
		  if (!(*brk >= 'a' && *brk <= 'f')
		      && !(*brk >= 'A' && *brk <= 'F'))
		    break;
		}
	      if (brk == curarg)
		args[i] = grub_strdup ("0");
	      else
		args[i] = grub_strndup (curarg, brk - curarg);
	    }
	    break;
	  case TYPE_VBE_MODE:
	    {
	      unsigned mod;
	      struct grub_vesa_mode_table_entry *modedesc;

	      mod = grub_strtoul (curarg, 0, 0);
	      if (grub_errno)
		{
		  mod = 0;
		  grub_errno = GRUB_ERR_NONE;
		}
	      if (mod < GRUB_VESA_MODE_TABLE_START
		  || mod > GRUB_VESA_MODE_TABLE_END)
		{
		  args[i] = grub_strdup ("auto");
		  break;
		}
	      modedesc = &grub_vesa_mode_table[mod - GRUB_VESA_MODE_TABLE_START];
	      if (!modedesc->width)
		{
		  args[i] = grub_strdup ("auto");
		  break;
		}
	      args[i] = grub_xasprintf ("%ux%ux%u",
					modedesc->width, modedesc->height,
					modedesc->depth);
	      break;
	    }
	  case TYPE_BOOL:
	    if (curarglen == 2 && curarg[0] == 'o' && curarg[1] == 'n')
	      args[i] = grub_strdup ("1");
	    else
	      args[i] = grub_strdup ("0");
	    break;
	  }
      }
  }

  while (legacy_commands[cmdnum].argc > 0
	 && args[legacy_commands[cmdnum].argc - 1] == NULL
	 && (legacy_commands[cmdnum].flags & FLAG_FALLBACK_AVAILABLE)
	 && args[legacy_commands[cmdnum + 1].argc] == NULL)
    cmdnum++;

  for (; i < legacy_commands[cmdnum].argc; i++)
    switch (legacy_commands[cmdnum].argt[i])
      {
      case TYPE_FILE_NO_CONSUME:
      case TYPE_PARTITION:
      case TYPE_FILE:
      case TYPE_REST_VERBATIM:
      case TYPE_VERBATIM:
      case TYPE_WITH_CONFIGFILE_OPTION:
      case TYPE_FORCE_OPTION:
      case TYPE_NOAPM_OPTION:
      case TYPE_TYPE_OR_NOMEM_OPTION:
      case TYPE_OPTION:	
	args[i] = grub_strdup ("");
	break;
      case TYPE_BOOL:
      case TYPE_INT:
	args[i] = grub_strdup ("0");
	break;
      case TYPE_VBE_MODE:    
	args[i] = grub_strdup ("auto");
	break;
      }

  if (legacy_commands[cmdnum].flags & FLAG_COLOR_INVERT)
    {
      char *corig = args[legacy_commands[cmdnum].argc - 1];
      char *slash = grub_strchr (corig, '/');
      char *invert;
      grub_size_t len;

      len = grub_strlen (corig);
      if (!slash)
	{
	  grub_error (GRUB_ERR_BAD_ARGUMENT, N_("invalid color specification `%s'"),
		      args[0]);
	  return NULL;
	}
      invert = grub_malloc (len + 1);
      if (!invert)
	return NULL;
      grub_memcpy (invert, slash + 1, len - (slash - corig) - 1);
      invert[len - (slash - args[0]) - 1] = '/'; 
      grub_memcpy (invert + len - (slash - corig), corig, slash - corig);
      invert[len] = 0;
      args[legacy_commands[cmdnum].argc] = invert;
    }

  if (legacy_commands[cmdnum].suffix)
    {
      *suffix = grub_xasprintf (legacy_commands[cmdnum].suffix,
				args[legacy_commands[cmdnum].suffixarg]);
      if (*suffix)
	return NULL;
    }

  {
    char *ret = grub_xasprintf (legacy_commands[cmdnum].map, args[0], args[1],
				args[2], args[3]);
    grub_free (args[0]);
    grub_free (args[1]);
    grub_free (args[2]);
    grub_free (args[3]);
    return ret;
  }
}
示例#5
0
文件: getroot.c 项目: purism/grub
static char *
grub_util_get_raid_grub_dev (const char *os_dev)
{
  char *grub_dev = NULL;
  if (os_dev[7] == '_' && os_dev[8] == 'd')
    {
      /* This a partitionable RAID device of the form /dev/md_dNNpMM. */

      char *p, *q;

      p = strdup (os_dev + sizeof ("/dev/md_d") - 1);

      q = strchr (p, 'p');
      if (q)
	*q = ',';

      grub_dev = xasprintf ("md%s", p);
      free (p);
    }
  else if (os_dev[7] == '/' && os_dev[8] == 'd')
    {
      /* This a partitionable RAID device of the form /dev/md/dNNpMM. */

      char *p, *q;

      p = strdup (os_dev + sizeof ("/dev/md/d") - 1);

      q = strchr (p, 'p');
      if (q)
	*q = ',';

      grub_dev = xasprintf ("md%s", p);
      free (p);
    }
  else if (os_dev[7] >= '0' && os_dev[7] <= '9')
    {
      char *p , *q;

      p = strdup (os_dev + sizeof ("/dev/md") - 1);

      q = strchr (p, 'p');
      if (q)
	*q = ',';

      grub_dev = xasprintf ("md%s", p);
      free (p);
    }
  else if (os_dev[7] == '/' && os_dev[8] >= '0' && os_dev[8] <= '9')
    {
      char *p , *q;

      p = strdup (os_dev + sizeof ("/dev/md/") - 1);

      q = strchr (p, 'p');
      if (q)
	*q = ',';

      grub_dev = xasprintf ("md%s", p);
      free (p);
    }
  else if (os_dev[7] == '/')
    {
      /* mdraid 1.x with a free name.  */
      char *p , *q;

      p = strdup (os_dev + sizeof ("/dev/md/") - 1);

      q = strchr (p, 'p');
      if (q)
	*q = ',';

      grub_dev = xasprintf ("md/%s", p);
      free (p);
    }
  else
    grub_util_error (_("unknown kind of RAID device `%s'"), os_dev);

  {
    char *mdadm_name = get_mdadm_uuid (os_dev);

    if (mdadm_name)
      {
	const char *q;

	for (q = os_dev + strlen (os_dev) - 1; q >= os_dev
	       && grub_isdigit (*q); q--);

	if (q >= os_dev && *q == 'p')
	  {
	    free (grub_dev);
	    grub_dev = xasprintf ("mduuid/%s,%s", mdadm_name, q + 1);
	    goto done;
	  }
	free (grub_dev);
	grub_dev = xasprintf ("mduuid/%s", mdadm_name);

      done:
	free (mdadm_name);
      }
  }
  return grub_dev;
}
示例#6
0
文件: arcdisk.c 项目: pendor/grub-zfs
static grub_err_t
grub_arcdisk_open (const char *name, grub_disk_t disk)
{
  char *fullname, *optr;
  const char *iptr;
  int state = 0;
  grub_err_t err;
  grub_arc_err_t r;
  struct grub_arc_fileinfo info;
  struct arcdisk_hash_ent *hash;

  if (grub_memcmp (name, "arc/", 4) != 0)
    return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not arc device");
  fullname = grub_malloc (2 * grub_strlen (name) + sizeof (RAW_SUFFIX));
  if (!fullname)
    return grub_errno;
  optr = fullname;
  for (iptr = name + 4; *iptr; iptr++)
    if (state == 0)
      {
	if (!grub_isdigit (*iptr))
	  *optr++ = *iptr;
	else
	  {
	    *optr++ = '(';
	    *optr++ = *iptr;
	    state = 1;
	  }
      }
    else
      {
	if (grub_isdigit (*iptr))
	  *optr++ = *iptr;
	else
	  {
	    *optr++ = ')';
	    state = 0;
	  }
      }
  if (state)
    *optr++ = ')';
  grub_memcpy (optr, RAW_SUFFIX, sizeof (RAW_SUFFIX));
  disk->data = fullname;
  grub_dprintf ("arcdisk", "opening %s\n", fullname);

  hash = arcdisk_hash_find (fullname);
  if (!hash)
    hash = arcdisk_hash_add (fullname);
  if (!hash)
    return grub_errno;

  err = reopen (fullname);
  if (err)
    return err;

  r = GRUB_ARC_FIRMWARE_VECTOR->getfileinformation (last_handle, &info);
  if (r)
    {
      grub_uint64_t res = 0;
      int i;

      grub_dprintf ("arcdisk", "couldn't retrieve size: %ld\n", r);
      for (i = 40; i >= 9; i--)
	{
	  grub_uint64_t pos = res | (1ULL << i);
	  char buf[512];
	  long unsigned count = 0;
	  grub_dprintf ("arcdisk",
			"seek to 0x%" PRIxGRUB_UINT64_T "\n", pos);
	  if (GRUB_ARC_FIRMWARE_VECTOR->seek (last_handle, &pos, 0))
	    continue;
	  if (GRUB_ARC_FIRMWARE_VECTOR->read (last_handle, buf,
					      0x200, &count))
	    continue;
	  if (count == 0)
	    continue;
	  res |= (1ULL << i);
	}
      grub_dprintf ("arcdisk",
		    "determined disk size 0x%" PRIxGRUB_UINT64_T "\n", res);
      disk->total_sectors = (res + 0x200) >> 9;
    }
  else
示例#7
0
static void
read_device_map (const char *dev_map)
{
  FILE *fp;
  char buf[1024];	/* XXX */
  int lineno = 0;

  if (dev_map[0] == '\0')
    {
      grub_util_info ("no device.map");
      return;
    }

  fp = grub_util_fopen (dev_map, "r");
  if (! fp)
    {
      grub_util_info (_("cannot open `%s': %s"), dev_map, strerror (errno));
      return;
    }

  while (fgets (buf, sizeof (buf), fp))
    {
      char *p = buf;
      char *e;
      char *drive_e, *drive_p;
      int drive;

      lineno++;

      /* Skip leading spaces.  */
      while (*p && grub_isspace (*p))
	p++;

      /* If the first character is `#' or NUL, skip this line.  */
      if (*p == '\0' || *p == '#')
	continue;

      if (*p != '(')
	{
	  char *tmp;
	  tmp = xasprintf (_("missing `%c' symbol"), '(');
	  grub_util_error ("%s:%d: %s", dev_map, lineno, tmp);
	}

      p++;
      /* Find a free slot.  */
      drive = find_free_slot ();
      if (drive < 0)
	grub_util_error ("%s:%d: %s", dev_map, lineno, _("device count exceeds limit"));

      e = p;
      p = strchr (p, ')');
      if (! p)
	{
	  char *tmp;
	  tmp = xasprintf (_("missing `%c' symbol"), ')');
	  grub_util_error ("%s:%d: %s", dev_map, lineno, tmp);
	}

      map[drive].drive = 0;
      if ((e[0] == 'f' || e[0] == 'h' || e[0] == 'c') && e[1] == 'd')
	{
	  char *ptr;
	  for (ptr = e + 2; ptr < p; ptr++)
	    if (!grub_isdigit (*ptr))
	      break;
	  if (ptr == p)
	    {
	      map[drive].drive = xmalloc (p - e + sizeof ('\0'));
	      strncpy (map[drive].drive, e, p - e + sizeof ('\0'));
	      map[drive].drive[p - e] = '\0';
	    }
	  if (*ptr == ',')
	    {
	      *p = 0;

	      /* TRANSLATORS: Only one entry is ignored. However the suggestion
		 is to correct/delete the whole file.
		 device.map is a file indicating which
		 devices are available at boot time. Fedora populated it with
		 entries like (hd0,1) /dev/sda1 which would mean that every
		 partition is a separate disk for BIOS. Such entries were
		 inactive in GRUB due to its bug which is now gone. Without
		 this additional check these entries would be harmful now.
	      */
	      grub_util_warn (_("the device.map entry `%s' is invalid. "
				"Ignoring it. Please correct or "
				"delete your device.map"), e);
	      continue;
	    }
	}
      drive_e = e;
      drive_p = p;
      map[drive].device_map = 1;

      p++;
      /* Skip leading spaces.  */
      while (*p && grub_isspace (*p))
	p++;

      if (*p == '\0')
	grub_util_error ("%s:%d: %s", dev_map, lineno, _("filename expected"));

      /* NUL-terminate the filename.  */
      e = p;
      while (*e && ! grub_isspace (*e))
	e++;
      *e = '\0';

      if (!grub_util_check_file_presence (p))
	{
	  free (map[drive].drive);
	  map[drive].drive = NULL;
	  grub_util_info ("Cannot stat `%s', skipping", p);
	  continue;
	}

      /* On Linux, the devfs uses symbolic links horribly, and that
	 confuses the interface very much, so use realpath to expand
	 symbolic links.  */
      map[drive].device = canonicalize_file_name (p);
      if (! map[drive].device)
	map[drive].device = xstrdup (p);
      
      if (!map[drive].drive)
	{
	  char c;
	  map[drive].drive = xmalloc (sizeof ("hostdisk/") + strlen (p));
	  memcpy (map[drive].drive, "hostdisk/", sizeof ("hostdisk/") - 1);
	  strcpy (map[drive].drive + sizeof ("hostdisk/") - 1, p);
	  c = *drive_p;
	  *drive_p = 0;
	  /* TRANSLATORS: device.map is a filename. Not to be translated.
	     device.map specifies disk correspondance overrides. Previously
	     one could create any kind of device name with this. Due to
	     some problems we decided to limit it to just a handful
	     possibilities.  */
	  grub_util_warn (_("the drive name `%s' in device.map is incorrect. "
			    "Using %s instead. "
			    "Please use the form [hfc]d[0-9]* "
			    "(E.g. `hd0' or `cd')"),
			  drive_e, map[drive].drive);
	  *drive_p = c;
	}

      grub_util_info ("adding `%s' -> `%s' from device.map", map[drive].drive,
		      map[drive].device);

      grub_hostdisk_flush_initial_buffer (map[drive].device);
    }

  fclose (fp);
}
示例#8
0
static grub_err_t
plan_partition_map_iterate (grub_disk_t disk,
			    grub_partition_iterate_hook_t hook,
			    void *hook_data)
{
  struct grub_partition p;
  int ptr = 0;
  grub_err_t err;

  p.partmap = &grub_plan_partition_map;
  p.msdostype = 0;

  for (p.number = 0; ; p.number++)
    {
      char sig[sizeof ("part ") - 1];
      char c;

      p.offset = (ptr >> GRUB_DISK_SECTOR_BITS) + 1;
      p.index = ptr & (GRUB_DISK_SECTOR_SIZE - 1);

      err = grub_disk_read (disk, 1, ptr, sizeof (sig), sig);
      if (err)
	return err;
      if (grub_memcmp (sig, "part ", sizeof ("part ") - 1) != 0)
	break;
      ptr += sizeof (sig);
      do
	{
	  err = grub_disk_read (disk, 1, ptr, 1, &c);
	  if (err)
	    return err;
	  ptr++;
	}
      while (grub_isdigit (c) || grub_isalpha (c));
      if (c != ' ')
	break;
      p.start = 0;
      while (1)
	{
	  err = grub_disk_read (disk, 1, ptr, 1, &c);
	  if (err)
	    return err;
	  ptr++;
	  if (!grub_isdigit (c))
	    break;
	  p.start = p.start * 10 + (c - '0');
	}
      if (c != ' ')
	break;
      p.len = 0;
      while (1)
	{
	  err = grub_disk_read (disk, 1, ptr, 1, &c);
	  if (err)
	    return err;
	  ptr++;
	  if (!grub_isdigit (c))
	    break;
	  p.len = p.len * 10 + (c - '0');
	}
      if (c != '\n')
	break;
      p.len -= p.start;
      if (hook (disk, &p, hook_data))
	return grub_errno;
    }
  if (p.number == 0)
    return grub_error (GRUB_ERR_BAD_PART_TABLE, "not a plan partition table");

  return GRUB_ERR_NONE;
}