arch/all-pc/boot/grub2-aros/grub-core/partmap/plan.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2010  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/partition.h>
  20 #include <grub/disk.h>
  21 #include <grub/mm.h>
  22 #include <grub/misc.h>
  23 #include <grub/dl.h>
  24 #include <grub/symbol.h>
  25 #include <grub/types.h>
  26 #include <grub/err.h>
  27
  28 GRUB_MOD_LICENSE ("GPLv3+");
  29
  30 static struct grub_partition_map grub_plan_partition_map;
  31
  32 static grub_err_t
  33 plan_partition_map_iterate (grub_disk_t disk,
  34                             grub_partition_iterate_hook_t hook,
  35                             void *hook_data)
  36 {
  37   struct grub_partition p;
  38   int ptr = 0;
  39   grub_err_t err;
  40
  41   p.partmap = &grub_plan_partition_map;
  42   p.msdostype = 0;
  43
  44   for (p.number = 0; ; p.number++)
  45     {
  46       char sig[sizeof ("part ") - 1];
  47       char c;
  48
  49       p.offset = (ptr >> GRUB_DISK_SECTOR_BITS) + 1;
  50       p.index = ptr & (GRUB_DISK_SECTOR_SIZE - 1);
  51
  52       err = grub_disk_read (disk, 1, ptr, sizeof (sig), sig);
  53       if (err)
  54         return err;
  55       if (grub_memcmp (sig, "part ", sizeof ("part ") - 1) != 0)
  56         break;
  57       ptr += sizeof (sig);
  58       do
  59         {
  60           err = grub_disk_read (disk, 1, ptr, 1, &c);
  61           if (err)
  62             return err;
  63           ptr++;
  64         }
  65       while (grub_isdigit (c) || grub_isalpha (c));
  66       if (c != ' ')
  67         break;
  68       p.start = 0;
  69       while (1)
  70         {
  71           err = grub_disk_read (disk, 1, ptr, 1, &c);
  72           if (err)
  73             return err;
  74           ptr++;
  75           if (!grub_isdigit (c))
  76             break;
  77           p.start = p.start * 10 + (c - '0');
  78         }
  79       if (c != ' ')
  80         break;
  81       p.len = 0;
  82       while (1)
  83         {
  84           err = grub_disk_read (disk, 1, ptr, 1, &c);
  85           if (err)
  86             return err;
  87           ptr++;
  88           if (!grub_isdigit (c))
  89             break;
  90           p.len = p.len * 10 + (c - '0');
  91         }
  92       if (c != '\n')
  93         break;
  94       p.len -= p.start;
  95       if (hook (disk, &p, hook_data))
  96         return grub_errno;
  97     }
  98   if (p.number == 0)
  99     return grub_error (GRUB_ERR_BAD_PART_TABLE, "not a plan partition table");
 100
 101   return GRUB_ERR_NONE;
 102 }
 103
 104 /* Partition map type.  */
 105 static struct grub_partition_map grub_plan_partition_map =
 106   {
 107     .name = "plan",
 108     .iterate = plan_partition_map_iterate,
 109   };
 110
 111 GRUB_MOD_INIT(part_plan)
 112 {
 113   grub_partition_map_register (&grub_plan_partition_map);
 114 }
 115
 116 GRUB_MOD_FINI(part_plan)
 117 {
 118   grub_partition_map_unregister (&grub_plan_partition_map);
 119 }
 120