119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/partition.h>
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#include <grub/disk.h>
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#include <grub/mm.h>
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#include <grub/misc.h>
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#include <grub/dl.h>
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#include <grub/symbol.h>
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#include <grub/types.h>
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#include <grub/err.h>
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static struct grub_partition_map grub_plan_partition_map;
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static grub_err_t
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plan_partition_map_iterate (grub_disk_t disk,
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int (*hook) (grub_disk_t disk,
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const grub_partition_t partition))
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{
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struct grub_partition p;
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int ptr = 0;
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grub_err_t err;
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p.partmap = &grub_plan_partition_map;
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p.msdostype = 0;
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for (p.number = 0; ; p.number++)
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{
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char sig[sizeof ("part ") - 1];
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char c;
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p.offset = (ptr >> GRUB_DISK_SECTOR_BITS) + 1;
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p.index = ptr & (GRUB_DISK_SECTOR_SIZE - 1);
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err = grub_disk_read (disk, 1, ptr, sizeof (sig), sig);
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if (err)
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return err;
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if (grub_memcmp (sig, "part ", sizeof ("part ") - 1) != 0)
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break;
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ptr += sizeof (sig);
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do
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{
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err = grub_disk_read (disk, 1, ptr, 1, &c);
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if (err)
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return err;
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ptr++;
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}
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while (grub_isdigit (c) || grub_isalpha (c));
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if (c != ' ')
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break;
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p.start = 0;
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while (1)
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{
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err = grub_disk_read (disk, 1, ptr, 1, &c);
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if (err)
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return err;
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ptr++;
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if (!grub_isdigit (c))
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break;
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p.start = p.start * 10 + (c - '0');
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}
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if (c != ' ')
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break;
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p.len = 0;
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while (1)
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{
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err = grub_disk_read (disk, 1, ptr, 1, &c);
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if (err)
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return err;
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ptr++;
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if (!grub_isdigit (c))
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break;
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p.len = p.len * 10 + (c - '0');
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}
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if (c != '\n')
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break;
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p.len -= p.start;
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if (hook (disk, &p))
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return grub_errno;
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}
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if (p.number == 0)
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return grub_error (GRUB_ERR_BAD_PART_TABLE, "not a plan partition table");
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return GRUB_ERR_NONE;
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}
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/* Partition map type. */
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static struct grub_partition_map grub_plan_partition_map =
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{
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.name = "plan",
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.iterate = plan_partition_map_iterate,
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};
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GRUB_MOD_INIT(part_plan)
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{
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grub_partition_map_register (&grub_plan_partition_map);
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}
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GRUB_MOD_FINI(part_plan)
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{
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grub_partition_map_unregister (&grub_plan_partition_map);
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}
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