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/* host.c - Dummy disk driver to provide access to the hosts filesystem */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 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/>.
*/
/* When using the disk, make a reference to this module. Otherwise
the user will end up with a useless module :-). */
#include <config.h>
#include <config-util.h>
#include <grub/dl.h>
#include <grub/disk.h>
#include <grub/misc.h>
#include <grub/emu/hostdisk.h>
int grub_disk_host_i_want_a_reference;
static int
grub_host_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data,
grub_disk_pull_t pull)
{
if (pull != GRUB_DISK_PULL_NONE)
return 0;
if (hook ("host", hook_data))
return 1;
return 0;
}
static grub_err_t
grub_host_open (const char *name, grub_disk_t disk)
{
if (grub_strcmp (name, "host"))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not a host disk");
disk->total_sectors = 0;
disk->id = 0;
disk->data = 0;
return GRUB_ERR_NONE;
}
static void
grub_host_close (grub_disk_t disk __attribute((unused)))
{
}
static grub_err_t
grub_host_read (grub_disk_t disk __attribute((unused)),
grub_disk_addr_t sector __attribute((unused)),
grub_size_t size __attribute((unused)),
char *buf __attribute((unused)))
{
return GRUB_ERR_OUT_OF_RANGE;
}
static grub_err_t
grub_host_write (grub_disk_t disk __attribute ((unused)),
grub_disk_addr_t sector __attribute ((unused)),
grub_size_t size __attribute ((unused)),
const char *buf __attribute ((unused)))
{
return GRUB_ERR_OUT_OF_RANGE;
}
static struct grub_disk_dev grub_host_dev =
{
/* The only important line in this file :-) */
.name = "host",
.id = GRUB_DISK_DEVICE_HOST_ID,
.disk_iterate = grub_host_iterate,
.disk_open = grub_host_open,
.disk_close = grub_host_close,
.disk_read = grub_host_read,
.disk_write = grub_host_write,
.next = 0
};
GRUB_MOD_INIT(host)
{
grub_disk_dev_register (&grub_host_dev);
}
GRUB_MOD_FINI(host)
{
grub_disk_dev_unregister (&grub_host_dev);
}
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