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Commit | Line | Data |
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0a203f83 | 1 | /* host.c - Dummy disk driver to provide access to the hosts filesystem */ |
2 | /* | |
3 | * GRUB -- GRand Unified Bootloader | |
4 | * Copyright (C) 2007 Free Software Foundation, Inc. | |
5 | * | |
6 | * GRUB is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * GRUB is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GRUB. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | /* When using the disk, make a reference to this module. Otherwise | |
21 | the user will end up with a useless module :-). */ | |
22 | ||
23 | #include <grub/dl.h> | |
24 | #include <grub/disk.h> | |
4cb68e89 | 25 | #include <grub/misc.h> |
0a203f83 | 26 | |
27 | int grub_disk_host_i_want_a_reference; | |
28 | ||
29 | static int | |
30 | grub_host_iterate (int (*hook) (const char *name)) | |
31 | { | |
32 | if (hook ("host")) | |
33 | return 1; | |
34 | return 0; | |
35 | } | |
36 | ||
37 | static grub_err_t | |
3b8db1a8 | 38 | grub_host_open (const char *name, grub_disk_t disk) |
0a203f83 | 39 | { |
3b8db1a8 | 40 | if (grub_strcmp (name, "host")) |
41 | return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not a host disk"); | |
42 | ||
0a203f83 | 43 | disk->total_sectors = 0; |
4b6e1995 | 44 | disk->id = (unsigned long) "host"; |
b39f9d20 | 45 | |
0a203f83 | 46 | disk->has_partitions = 0; |
47 | disk->data = 0; | |
48 | ||
49 | return GRUB_ERR_NONE; | |
50 | } | |
51 | ||
52 | static void | |
53 | grub_host_close (grub_disk_t disk __attribute((unused))) | |
54 | { | |
55 | } | |
56 | ||
57 | static grub_err_t | |
58 | grub_host_read (grub_disk_t disk __attribute((unused)), | |
59 | grub_disk_addr_t sector __attribute((unused)), | |
60 | grub_size_t size __attribute((unused)), | |
61 | char *buf __attribute((unused))) | |
62 | { | |
63 | return GRUB_ERR_OUT_OF_RANGE; | |
64 | } | |
65 | ||
66 | static grub_err_t | |
67 | grub_host_write (grub_disk_t disk __attribute ((unused)), | |
68 | grub_disk_addr_t sector __attribute ((unused)), | |
69 | grub_size_t size __attribute ((unused)), | |
70 | const char *buf __attribute ((unused))) | |
71 | { | |
72 | return GRUB_ERR_OUT_OF_RANGE; | |
73 | } | |
74 | ||
75 | static struct grub_disk_dev grub_host_dev = | |
76 | { | |
77 | /* The only important line in this file :-) */ | |
78 | .name = "host", | |
79 | .id = GRUB_DISK_DEVICE_HOST_ID, | |
80 | .iterate = grub_host_iterate, | |
81 | .open = grub_host_open, | |
82 | .close = grub_host_close, | |
83 | .read = grub_host_read, | |
84 | .write = grub_host_write, | |
85 | .next = 0 | |
86 | }; | |
87 | ||
88 | GRUB_MOD_INIT(host) | |
89 | { | |
0a203f83 | 90 | grub_disk_dev_register (&grub_host_dev); |
91 | } | |
92 | ||
93 | GRUB_MOD_FINI(host) | |
94 | { | |
95 | grub_disk_dev_unregister (&grub_host_dev); | |
96 | } |