1
/* search.c - search devices based on a file or a filesystem label */
3
* GRUB -- GRand Unified Bootloader
4
* Copyright (C) 2005 Free Software Foundation, Inc.
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 2 of the License, or
9
* (at your option) any later version.
11
* This program 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.
16
* You should have received a copy of the GNU General Public License
17
* along with GRUB; if not, write to the Free Software
18
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21
#include <grub/types.h>
22
#include <grub/misc.h>
26
#include <grub/normal.h>
28
#include <grub/device.h>
29
#include <grub/file.h>
32
static const struct grub_arg_option options[] =
34
{"file", 'f', 0, "search devices by a file (default)", 0, 0},
35
{"label", 'l', 0, "search devices by a filesystem label", 0, 0},
36
{"set", 's', GRUB_ARG_OPTION_OPTIONAL, "set a variable to the first device found", "VAR", ARG_TYPE_STRING},
41
search_label (const char *key, const char *var)
44
auto int iterate_device (const char *name);
46
int iterate_device (const char *name)
50
dev = grub_device_open (name);
55
fs = grub_fs_probe (dev);
60
(fs->label) (dev, &label);
61
if (grub_errno == GRUB_ERR_NONE && label)
63
if (grub_strcmp (label, key) == 0)
66
grub_printf (" %s", name);
67
if (count++ == 0 && var)
68
grub_env_set (var, name);
75
grub_device_close (dev);
78
grub_errno = GRUB_ERR_NONE;
82
grub_device_iterate (iterate_device);
85
grub_error (GRUB_ERR_FILE_NOT_FOUND, "no such device: %s", key);
89
search_file (const char *key, const char *var)
93
auto int iterate_device (const char *name);
95
int iterate_device (const char *name)
101
len = grub_strlen (name) + 2 + grub_strlen (key) + 1;
102
p = grub_realloc (buf, len);
107
grub_sprintf (buf, "(%s)%s", name, key);
109
file = grub_file_open (buf);
113
grub_printf (" %s", name);
114
if (count++ == 0 && var)
115
grub_env_set (var, name);
117
grub_file_close (file);
120
grub_errno = GRUB_ERR_NONE;
124
grub_device_iterate (iterate_device);
128
if (grub_errno == GRUB_ERR_NONE && count == 0)
129
grub_error (GRUB_ERR_FILE_NOT_FOUND, "no such device");
133
grub_cmd_search (struct grub_arg_list *state, int argc, char **args)
138
return grub_error (GRUB_ERR_INVALID_COMMAND, "no argument specified");
141
var = state[2].arg ? : "root";
144
search_label (args[0], var);
146
search_file (args[0], var);
151
GRUB_MOD_INIT(search)
153
(void) mod; /* To stop warning. */
154
grub_register_command ("search", grub_cmd_search, GRUB_COMMAND_FLAG_BOTH,
155
"search [-f|-l|-s] NAME",
156
"Search devices by a file or a filesystem label."
157
" If --set is specified, the first device found is"
158
" set to a variable. If no variable name is"
159
" specified, \"root\" is used.",
163
GRUB_MOD_FINI(search)
165
grub_unregister_command ("search");