grub/kern/partition.c
2009-06-10 21:04:23 +00:00

133 lines
3.2 KiB
C

/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2004,2007 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/misc.h>
#include <grub/partition.h>
#include <grub/disk.h>
static grub_partition_map_t grub_partition_map_list;
void
grub_partition_map_register (grub_partition_map_t partmap)
{
partmap->next = grub_partition_map_list;
grub_partition_map_list = partmap;
}
void
grub_partition_map_unregister (grub_partition_map_t partmap)
{
grub_partition_map_t *p, q;
for (p = &grub_partition_map_list, q = *p; q; p = &(q->next), q = q->next)
if (q == partmap)
{
*p = q->next;
break;
}
}
int
grub_partition_map_iterate (int (*hook) (const grub_partition_map_t partmap))
{
grub_partition_map_t p;
for (p = grub_partition_map_list; p; p = p->next)
if (hook (p))
return 1;
return 0;
}
grub_partition_t
grub_partition_probe (struct grub_disk *disk, const char *str)
{
grub_partition_t part = 0;
auto int part_map_probe (const grub_partition_map_t partmap);
int part_map_probe (const grub_partition_map_t partmap)
{
part = partmap->probe (disk, str);
if (part)
return 1;
if (grub_errno == GRUB_ERR_BAD_PART_TABLE)
{
/* Continue to next partition map type. */
grub_errno = GRUB_ERR_NONE;
return 0;
}
return 1;
}
/* Use the first partition map type found. */
grub_partition_map_iterate (part_map_probe);
return part;
}
int
grub_partition_iterate (struct grub_disk *disk,
int (*hook) (grub_disk_t disk,
const grub_partition_t partition))
{
grub_partition_map_t partmap = 0;
int ret = 0;
auto int part_map_iterate (const grub_partition_map_t p);
auto int part_map_iterate_hook (grub_disk_t d,
const grub_partition_t partition);
int part_map_iterate_hook (grub_disk_t d __attribute__ ((unused)),
const grub_partition_t partition __attribute__ ((unused)))
{
return 1;
}
int part_map_iterate (const grub_partition_map_t p)
{
grub_dprintf ("partition", "Detecting %s...\n", p->name);
p->iterate (disk, part_map_iterate_hook);
if (grub_errno != GRUB_ERR_NONE)
{
/* Continue to next partition map type. */
grub_dprintf ("partition", "%s detection failed.\n", p->name);
grub_errno = GRUB_ERR_NONE;
return 0;
}
grub_dprintf ("partition", "%s detection succeeded.\n", p->name);
partmap = p;
return 1;
}
grub_partition_map_iterate (part_map_iterate);
if (partmap)
ret = partmap->iterate (disk, hook);
return ret;
}
char *
grub_partition_get_name (const grub_partition_t partition)
{
return partition->partmap->get_name (partition);
}