diff options
Diffstat (limited to 'grub-core/parttool/msdospart.c')
| -rw-r--r-- | grub-core/parttool/msdospart.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/grub-core/parttool/msdospart.c b/grub-core/parttool/msdospart.c new file mode 100644 index 0000000..3918caa --- /dev/null +++ b/grub-core/parttool/msdospart.c @@ -0,0 +1,161 @@ +/* pcpart.c - manipulate fdisk partitions */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <grub/types.h> +#include <grub/misc.h> +#include <grub/mm.h> +#include <grub/err.h> +#include <grub/msdos_partition.h> +#include <grub/device.h> +#include <grub/disk.h> +#include <grub/partition.h> +#include <grub/parttool.h> +#include <grub/i18n.h> + +GRUB_MOD_LICENSE ("GPLv2+"); + +static int activate_table_handle = -1; +static int type_table_handle = -1; + +static struct grub_parttool_argdesc grub_pcpart_bootargs[] = +{ + {"boot", N_("Make partition active"), GRUB_PARTTOOL_ARG_BOOL}, + {0, 0, 0} +}; + +static grub_err_t grub_pcpart_boot (const grub_device_t dev, + const struct grub_parttool_args *args) +{ + int i, index; + grub_partition_t part; + struct grub_msdos_partition_mbr mbr; + + if (dev->disk->partition->offset) + return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("not a primary partition")); + + index = dev->disk->partition->index; + part = dev->disk->partition; + dev->disk->partition = part->parent; + + /* Read the MBR. */ + if (grub_disk_read (dev->disk, 0, 0, sizeof (mbr), &mbr)) + { + dev->disk->partition = part; + return grub_errno; + } + + if (args[0].set && args[0].bool) + { + for (i = 0; i < 4; i++) + mbr.entries[i].flag = 0x0; + mbr.entries[index].flag = 0x80; + grub_printf_ (N_("Partition %d is active now. \n"), index); + } + else + { + mbr.entries[index].flag = 0x0; + grub_printf (N_("Cleared active flag on %d. \n"), index); + } + + /* Write the MBR. */ + grub_disk_write (dev->disk, 0, 0, sizeof (mbr), &mbr); + + dev->disk->partition = part; + + return GRUB_ERR_NONE; +} + +static struct grub_parttool_argdesc grub_pcpart_typeargs[] = +{ + {"type", N_("Change partition type"), GRUB_PARTTOOL_ARG_VAL}, + {"hidden", N_("Set `hidden' flag in partition type"), GRUB_PARTTOOL_ARG_BOOL}, + {0, 0, 0} +}; + +static grub_err_t grub_pcpart_type (const grub_device_t dev, + const struct grub_parttool_args *args) +{ + int index; + grub_uint8_t type; + grub_partition_t part; + struct grub_msdos_partition_mbr mbr; + + index = dev->disk->partition->index; + part = dev->disk->partition; + dev->disk->partition = part->parent; + + /* Read the parttable. */ + if (grub_disk_read (dev->disk, part->offset, 0, + sizeof (mbr), &mbr)) + { + dev->disk->partition = part; + return grub_errno; + } + + if (args[0].set) + type = grub_strtoul (args[0].str, 0, 0); + else + type = mbr.entries[index].type; + + if (args[1].set) + { + if (args[1].bool) + type |= GRUB_PC_PARTITION_TYPE_HIDDEN_FLAG; + else + type &= ~GRUB_PC_PARTITION_TYPE_HIDDEN_FLAG; + } + + if (grub_msdos_partition_is_empty (type) + || grub_msdos_partition_is_extended (type)) + { + dev->disk->partition = part; + return grub_error (GRUB_ERR_BAD_ARGUMENT, + N_("the partition type 0x%x isn't valid"), type); + } + + mbr.entries[index].type = type; + /* TRANSLATORS: In this case we're actually writing to the disk and actively + modifying partition type rather than just defining it. */ + grub_printf_ (N_("Setting partition type to 0x%x\n"), type); + + /* Write the parttable. */ + grub_disk_write (dev->disk, part->offset, 0, + sizeof (mbr), &mbr); + + dev->disk->partition = part; + + return GRUB_ERR_NONE; +} + +GRUB_MOD_INIT (msdospart) +{ + activate_table_handle = grub_parttool_register ("msdos", + grub_pcpart_boot, + grub_pcpart_bootargs); + type_table_handle = grub_parttool_register ("msdos", + grub_pcpart_type, + grub_pcpart_typeargs); + +} +GRUB_MOD_FINI(msdospart) +{ + grub_parttool_unregister (activate_table_handle); + grub_parttool_unregister (type_table_handle); +} |