1 /* search.c - search devices based on a file or a filesystem label */
2 /*
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2005,2007,2008,2009 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 #include <grub/types.h>
21 #include <grub/misc.h>
22 #include <grub/mm.h>
23 #include <grub/err.h>
24 #include <grub/dl.h>
25 #include <grub/env.h>
26 #include <grub/extcmd.h>
27 #include <grub/search.h>
28 #include <grub/i18n.h>
29
30 GRUB_MOD_LICENSE ("GPLv3+");
31
32 static const struct grub_arg_option options[] =
33 {
34 {"file", 'f', 0, N_("Search devices by a file."), 0, 0},
35 {"label", 'l', 0, N_("Search devices by a filesystem label."),
36 0, 0},
37 {"fs-uuid", 'u', 0, N_("Search devices by a filesystem UUID."),
38 0, 0},
39 {"set", 's', GRUB_ARG_OPTION_OPTIONAL,
40 N_("Set a variable to the first device found."), N_("VARNAME"),
41 ARG_TYPE_STRING},
42 {"no-floppy", 'n', 0, N_("Do not probe any floppy drive."), 0, 0},
43 {"hint", 'h', GRUB_ARG_OPTION_REPEATABLE,
44 N_("First try the device HINT. If HINT ends in comma, "
45 "also try subpartitions"), N_("HINT"), ARG_TYPE_STRING},
46 {"hint-ieee1275", 0, GRUB_ARG_OPTION_REPEATABLE,
47 N_("First try the device HINT if currently running on IEEE1275. "
48 "If HINT ends in comma, also try subpartitions"),
49 N_("HINT"), ARG_TYPE_STRING},
50 {"hint-bios", 0, GRUB_ARG_OPTION_REPEATABLE,
51 N_("First try the device HINT if currently running on BIOS. "
52 "If HINT ends in comma, also try subpartitions"),
53 N_("HINT"), ARG_TYPE_STRING},
54 {"hint-baremetal", 0, GRUB_ARG_OPTION_REPEATABLE,
55 N_("First try the device HINT if direct hardware access is supported. "
56 "If HINT ends in comma, also try subpartitions"),
57 N_("HINT"), ARG_TYPE_STRING},
58 {"hint-efi", 0, GRUB_ARG_OPTION_REPEATABLE,
59 N_("First try the device HINT if currently running on EFI. "
60 "If HINT ends in comma, also try subpartitions"),
61 N_("HINT"), ARG_TYPE_STRING},
62 {"hint-arc", 0, GRUB_ARG_OPTION_REPEATABLE,
63 N_("First try the device HINT if currently running on ARC."
64 " If HINT ends in comma, also try subpartitions"),
65 N_("HINT"), ARG_TYPE_STRING},
66 {0, 0, 0, 0, 0, 0}
67 };
68
69 enum options
70 {
71 SEARCH_FILE,
72 SEARCH_LABEL,
73 SEARCH_FS_UUID,
74 SEARCH_SET,
75 SEARCH_NO_FLOPPY,
76 SEARCH_HINT,
77 SEARCH_HINT_IEEE1275,
78 SEARCH_HINT_BIOS,
79 SEARCH_HINT_BAREMETAL,
80 SEARCH_HINT_EFI,
81 SEARCH_HINT_ARC,
82 };
83
84 static grub_err_t
85 grub_cmd_search (grub_extcmd_context_t ctxt, int argc, char **args)
86 {
87 struct grub_arg_list *state = ctxt->state;
88 const char *var = 0;
89 const char *id = 0;
90 int i = 0, j = 0, nhints = 0;
91 char **hints = NULL;
92
93 if (state[SEARCH_HINT].set)
94 for (i = 0; state[SEARCH_HINT].args[i]; i++)
95 nhints++;
96
97 #ifdef GRUB_MACHINE_IEEE1275
98 if (state[SEARCH_HINT_IEEE1275].set)
99 for (i = 0; state[SEARCH_HINT_IEEE1275].args[i]; i++)
100 nhints++;
101 #endif
102
103 #ifdef GRUB_MACHINE_EFI
104 if (state[SEARCH_HINT_EFI].set)
105 for (i = 0; state[SEARCH_HINT_EFI].args[i]; i++)
106 nhints++;
107 #endif
108
109 #ifdef GRUB_MACHINE_PCBIOS
110 if (state[SEARCH_HINT_BIOS].set)
111 for (i = 0; state[SEARCH_HINT_BIOS].args[i]; i++)
112 nhints++;
113 #endif
114
115 #ifdef GRUB_MACHINE_ARC
116 if (state[SEARCH_HINT_ARC].set)
117 for (i = 0; state[SEARCH_HINT_ARC].args[i]; i++)
118 nhints++;
119 #endif
120
121 if (state[SEARCH_HINT_BAREMETAL].set)
122 for (i = 0; state[SEARCH_HINT_BAREMETAL].args[i]; i++)
123 nhints++;
124
125 hints = grub_malloc (sizeof (hints[0]) * nhints);
126 if (!hints)
127 return grub_errno;
128 j = 0;
129
130 if (state[SEARCH_HINT].set)
131 for (i = 0; state[SEARCH_HINT].args[i]; i++)
132 hints[j++] = state[SEARCH_HINT].args[i];
133
134 #ifdef GRUB_MACHINE_IEEE1275
135 if (state[SEARCH_HINT_IEEE1275].set)
136 for (i = 0; state[SEARCH_HINT_IEEE1275].args[i]; i++)
137 hints[j++] = state[SEARCH_HINT_IEEE1275].args[i];
138 #endif
139
140 #ifdef GRUB_MACHINE_EFI
141 if (state[SEARCH_HINT_EFI].set)
142 for (i = 0; state[SEARCH_HINT_EFI].args[i]; i++)
143 hints[j++] = state[SEARCH_HINT_EFI].args[i];
144 #endif
145
146 #ifdef GRUB_MACHINE_ARC
147 if (state[SEARCH_HINT_ARC].set)
148 for (i = 0; state[SEARCH_HINT_ARC].args[i]; i++)
149 hints[j++] = state[SEARCH_HINT_ARC].args[i];
150 #endif
151
152 #ifdef GRUB_MACHINE_PCBIOS
153 if (state[SEARCH_HINT_BIOS].set)
154 for (i = 0; state[SEARCH_HINT_BIOS].args[i]; i++)
155 hints[j++] = state[SEARCH_HINT_BIOS].args[i];
156 #endif
157
158 if (state[SEARCH_HINT_BAREMETAL].set)
159 for (i = 0; state[SEARCH_HINT_BAREMETAL].args[i]; i++)
160 hints[j++] = state[SEARCH_HINT_BAREMETAL].args[i];
161
162 /* Skip hints for future platforms. */
163 for (j = 0; j < argc; j++)
164 if (grub_memcmp (args[j], "--hint-", sizeof ("--hint-") - 1) != 0)
165 break;
166
167 if (state[SEARCH_SET].set)
168 var = state[SEARCH_SET].arg ? state[SEARCH_SET].arg : "root";
169
170 if (argc != j)
171 id = args[j];
172 else if (state[SEARCH_SET].set && state[SEARCH_SET].arg)
173 {
174 id = state[SEARCH_SET].arg;
175 var = "root";
176 }
177 else
178 return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
179
180 if (state[SEARCH_LABEL].set)
181 grub_search_label (id, var, state[SEARCH_NO_FLOPPY].set,
182 hints, nhints);
183 else if (state[SEARCH_FS_UUID].set)
184 grub_search_fs_uuid (id, var, state[SEARCH_NO_FLOPPY].set,
185 hints, nhints);
186 else if (state[SEARCH_FILE].set)
187 grub_search_fs_file (id, var, state[SEARCH_NO_FLOPPY].set,
188 hints, nhints);
189 else
190 return grub_error (GRUB_ERR_INVALID_COMMAND, "unspecified search type");
191
192 return grub_errno;
193 }
194
195 static grub_extcmd_t cmd;
196
197 GRUB_MOD_INIT(search)
198 {
199 cmd =
200 grub_register_extcmd ("search", grub_cmd_search,
201 GRUB_COMMAND_FLAG_EXTRACTOR | GRUB_COMMAND_ACCEPT_DASH,
202 N_("[-f|-l|-u|-s|-n] [--hint HINT [--hint HINT] ...]"
203 " NAME"),
204 N_("Search devices by file, filesystem label"
205 " or filesystem UUID."
206 " If --set is specified, the first device found is"
207 " set to a variable. If no variable name is"
208 " specified, `root' is used."),
209 options);
210 }
211
212 GRUB_MOD_FINI(search)
213 {
214 grub_unregister_extcmd (cmd);
215 }