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sortix--sortix/libmount/biosboot.c
Jonas 'Sortie' Termansen e6a1cd6dee Add libmount.
2016-02-03 01:01:20 +01:00

87 lines
2.4 KiB
C

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2015.
This file is part of Sortix libmount.
Sortix libmount is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
Sortix libmount 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with Sortix libmount. If not, see <http://www.gnu.org/licenses/>.
biosboot.c
GPT bios boot partition.
*******************************************************************************/
#include <stdbool.h>
#include <stddef.h>
#include <string.h>
#include <mount/biosboot.h>
#include <mount/blockdevice.h>
#include <mount/filesystem.h>
#include <mount/partition.h>
#include <mount/uuid.h>
#include "util.h"
static size_t biosboot_probe_amount(struct blockdevice* bdev)
{
(void) bdev;
return 0;
}
static bool biosboot_probe(struct blockdevice* bdev,
const unsigned char* leading,
size_t amount)
{
(void) leading;
(void) amount;
struct partition* p = bdev->p;
if ( !p )
return false;
if ( p->table_type != PARTITION_TABLE_TYPE_GPT )
return false;
unsigned char uuid[16];
uuid_from_string(uuid, BIOSBOOT_GPT_TYPE_UUID);
return memcmp(p->gpt_type_guid, uuid, 16) == 0;
}
static void biosboot_release(struct filesystem* fs)
{
if ( !fs )
return;
free(fs);
}
static enum filesystem_error biosboot_inspect(struct filesystem** fs_ptr,
struct blockdevice* bdev)
{
*fs_ptr = NULL;
struct filesystem* fs = CALLOC_TYPE(struct filesystem);
if ( !fs )
return FILESYSTEM_ERROR_ERRNO;
fs->bdev = bdev;
fs->handler = &biosboot_handler;
fs->handler_private = NULL;
fs->fstype_name = "biosboot";
return *fs_ptr = fs, FILESYSTEM_ERROR_NONE;
}
const struct filesystem_handler biosboot_handler =
{
.handler_name = "biosboot",
.probe_amount = biosboot_probe_amount,
.probe = biosboot_probe,
.inspect = biosboot_inspect,
.release = biosboot_release,
};