158 lines
4.2 KiB
C
158 lines
4.2 KiB
C
/* pcpart.c - manipulate fdisk partitions */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/msdos_partition.h>
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#include <grub/device.h>
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#include <grub/disk.h>
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#include <grub/partition.h>
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#include <grub/parttool.h>
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#include <grub/i18n.h>
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GRUB_MOD_LICENSE ("GPLv2+");
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static int activate_table_handle = -1;
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static int type_table_handle = -1;
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static struct grub_parttool_argdesc grub_pcpart_bootargs[] =
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{
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{"boot", N_("Make partition active"), GRUB_PARTTOOL_ARG_BOOL},
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{0, 0, 0}
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};
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static grub_err_t grub_pcpart_boot (const grub_device_t dev,
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const struct grub_parttool_args *args)
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{
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int i, index;
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grub_partition_t part;
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struct grub_msdos_partition_mbr mbr;
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if (dev->disk->partition->offset)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "not a primary partition");
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index = dev->disk->partition->index;
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part = dev->disk->partition;
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dev->disk->partition = part->parent;
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/* Read the MBR. */
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if (grub_disk_read (dev->disk, 0, 0, sizeof (mbr), &mbr))
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{
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dev->disk->partition = part;
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return grub_errno;
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}
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if (args[0].set && args[0].bool)
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{
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for (i = 0; i < 4; i++)
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mbr.entries[i].flag = 0x0;
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mbr.entries[index].flag = 0x80;
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grub_printf_ (N_("Partition %d is active now. \n"), index);
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}
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else
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{
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mbr.entries[index].flag = 0x0;
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grub_printf (N_("Cleared active flag on %d. \n"), index);
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}
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/* Write the MBR. */
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grub_disk_write (dev->disk, 0, 0, sizeof (mbr), &mbr);
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dev->disk->partition = part;
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return GRUB_ERR_NONE;
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}
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static struct grub_parttool_argdesc grub_pcpart_typeargs[] =
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{
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{"type", N_("Change partition type"), GRUB_PARTTOOL_ARG_VAL},
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{"hidden", N_("Set `hidden' flag in partition type"), GRUB_PARTTOOL_ARG_BOOL},
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{0, 0, 0}
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};
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static grub_err_t grub_pcpart_type (const grub_device_t dev,
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const struct grub_parttool_args *args)
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{
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int index;
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grub_uint8_t type;
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grub_partition_t part;
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struct grub_msdos_partition_mbr mbr;
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index = dev->disk->partition->index;
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part = dev->disk->partition;
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dev->disk->partition = part->parent;
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/* Read the parttable. */
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if (grub_disk_read (dev->disk, part->offset, 0,
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sizeof (mbr), &mbr))
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{
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dev->disk->partition = part;
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return grub_errno;
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}
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if (args[0].set)
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type = grub_strtoul (args[0].str, 0, 0);
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else
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type = mbr.entries[index].type;
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if (args[1].set)
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{
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if (args[1].bool)
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type |= GRUB_PC_PARTITION_TYPE_HIDDEN_FLAG;
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else
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type &= ~GRUB_PC_PARTITION_TYPE_HIDDEN_FLAG;
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}
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if (grub_msdos_partition_is_empty (type)
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|| grub_msdos_partition_is_extended (type))
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{
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dev->disk->partition = part;
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid type");
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}
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mbr.entries[index].type = type;
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grub_printf_ (N_("Setting partition type to 0x%x\n"), type);
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/* Write the parttable. */
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grub_disk_write (dev->disk, part->offset, 0,
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sizeof (mbr), &mbr);
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dev->disk->partition = part;
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return GRUB_ERR_NONE;
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}
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GRUB_MOD_INIT (msdospart)
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{
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activate_table_handle = grub_parttool_register ("msdos",
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grub_pcpart_boot,
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grub_pcpart_bootargs);
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type_table_handle = grub_parttool_register ("msdos",
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grub_pcpart_type,
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grub_pcpart_typeargs);
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}
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GRUB_MOD_FINI(msdospart)
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{
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grub_parttool_unregister (activate_table_handle);
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grub_parttool_unregister (type_table_handle);
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}
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