103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/* host.c - Dummy disk driver to provide access to the hosts filesystem */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2007 Free Software Foundation, Inc.
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*
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* GRUB 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 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* When using the disk, make a reference to this module. Otherwise
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the user will end up with a useless module :-). */
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#include <config.h>
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#include <config-util.h>
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#include <grub/dl.h>
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#include <grub/disk.h>
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#include <grub/misc.h>
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#include <grub/emu/hostdisk.h>
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int grub_disk_host_i_want_a_reference;
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static int
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grub_host_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data,
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grub_disk_pull_t pull)
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{
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if (pull != GRUB_DISK_PULL_NONE)
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return 0;
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if (hook ("host", hook_data))
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return 1;
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return 0;
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}
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static grub_err_t
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grub_host_open (const char *name, grub_disk_t disk)
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{
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if (grub_strcmp (name, "host"))
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return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not a host disk");
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disk->total_sectors = 0;
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disk->id = 0;
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disk->data = 0;
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return GRUB_ERR_NONE;
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}
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static void
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grub_host_close (grub_disk_t disk __attribute((unused)))
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{
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}
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static grub_err_t
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grub_host_read (grub_disk_t disk __attribute((unused)),
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grub_disk_addr_t sector __attribute((unused)),
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grub_size_t size __attribute((unused)),
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char *buf __attribute((unused)))
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{
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return GRUB_ERR_OUT_OF_RANGE;
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}
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static grub_err_t
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grub_host_write (grub_disk_t disk __attribute ((unused)),
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grub_disk_addr_t sector __attribute ((unused)),
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grub_size_t size __attribute ((unused)),
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const char *buf __attribute ((unused)))
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{
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return GRUB_ERR_OUT_OF_RANGE;
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}
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static struct grub_disk_dev grub_host_dev =
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{
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/* The only important line in this file :-) */
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.name = "host",
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.id = GRUB_DISK_DEVICE_HOST_ID,
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.iterate = grub_host_iterate,
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.open = grub_host_open,
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.close = grub_host_close,
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.read = grub_host_read,
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.write = grub_host_write,
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.next = 0
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};
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GRUB_MOD_INIT(host)
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{
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grub_disk_dev_register (&grub_host_dev);
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}
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GRUB_MOD_FINI(host)
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{
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grub_disk_dev_unregister (&grub_host_dev);
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}
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