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4cbe67e5 | 1 | /* keystatus.c - Command to check key modifier status. */ |
2 | /* | |
3 | * GRUB -- GRand Unified Bootloader | |
4 | * Copyright (C) 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/dl.h> | |
21 | #include <grub/misc.h> | |
22 | #include <grub/extcmd.h> | |
23 | #include <grub/term.h> | |
77a79592 | 24 | #include <grub/i18n.h> |
4cbe67e5 | 25 | |
e745cf0c VS |
26 | GRUB_MOD_LICENSE ("GPLv3+"); |
27 | ||
4cbe67e5 | 28 | static const struct grub_arg_option options[] = |
29 | { | |
77a79592 | 30 | {"shift", 's', 0, N_("Check Shift key."), 0, 0}, |
31 | {"ctrl", 'c', 0, N_("Check Control key."), 0, 0}, | |
32 | {"alt", 'a', 0, N_("Check Alt key."), 0, 0}, | |
4cbe67e5 | 33 | {0, 0, 0, 0, 0, 0} |
34 | }; | |
35 | ||
87fae34a VS |
36 | static int |
37 | grub_getkeystatus (void) | |
38 | { | |
39 | int status = 0; | |
40 | grub_term_input_t term; | |
41 | ||
fea90138 VS |
42 | if (grub_term_poll_usb) |
43 | grub_term_poll_usb (); | |
44 | ||
87fae34a VS |
45 | FOR_ACTIVE_TERM_INPUTS(term) |
46 | { | |
47 | if (term->getkeystatus) | |
7a6459e1 | 48 | status |= term->getkeystatus (term); |
87fae34a VS |
49 | } |
50 | ||
51 | return status; | |
52 | } | |
4cbe67e5 | 53 | |
54 | static grub_err_t | |
28be0e94 | 55 | grub_cmd_keystatus (grub_extcmd_context_t ctxt, |
4cbe67e5 | 56 | int argc __attribute__ ((unused)), |
57 | char **args __attribute__ ((unused))) | |
58 | { | |
28be0e94 | 59 | struct grub_arg_list *state = ctxt->state; |
4cbe67e5 | 60 | int expect_mods = 0; |
61 | int mods; | |
62 | ||
63 | if (state[0].set) | |
e55e0962 | 64 | expect_mods |= (GRUB_TERM_STATUS_LSHIFT | GRUB_TERM_STATUS_RSHIFT); |
4cbe67e5 | 65 | if (state[1].set) |
e55e0962 | 66 | expect_mods |= (GRUB_TERM_STATUS_LCTRL | GRUB_TERM_STATUS_RCTRL); |
4cbe67e5 | 67 | if (state[2].set) |
e55e0962 | 68 | expect_mods |= (GRUB_TERM_STATUS_LALT | GRUB_TERM_STATUS_RALT); |
4cbe67e5 | 69 | |
8eca55a6 RM |
70 | grub_dprintf ("keystatus", "expect_mods: %d\n", expect_mods); |
71 | ||
4cbe67e5 | 72 | /* Without arguments, just check whether getkeystatus is supported at |
73 | all. */ | |
8eca55a6 RM |
74 | if (expect_mods == 0) |
75 | { | |
76 | grub_term_input_t term; | |
ca04c7a5 | 77 | int nterms = 0; |
8eca55a6 RM |
78 | |
79 | FOR_ACTIVE_TERM_INPUTS (term) | |
ca04c7a5 VS |
80 | if (!term->getkeystatus) |
81 | return grub_error (GRUB_ERR_TEST_FAILURE, "false"); | |
82 | else | |
83 | nterms++; | |
84 | if (!nterms) | |
85 | return grub_error (GRUB_ERR_TEST_FAILURE, "false"); | |
86 | return 0; | |
8eca55a6 | 87 | } |
4cbe67e5 | 88 | |
89 | mods = grub_getkeystatus (); | |
90 | grub_dprintf ("keystatus", "mods: %d\n", mods); | |
91 | if (mods >= 0 && (mods & expect_mods) != 0) | |
92 | return 0; | |
93 | else | |
94 | return grub_error (GRUB_ERR_TEST_FAILURE, "false"); | |
95 | } | |
96 | ||
97 | static grub_extcmd_t cmd; | |
98 | \f | |
99 | GRUB_MOD_INIT(keystatus) | |
100 | { | |
ed80f7d5 | 101 | cmd = grub_register_extcmd ("keystatus", grub_cmd_keystatus, 0, |
77a79592 | 102 | N_("[--shift] [--ctrl] [--alt]"), |
103 | N_("Check key modifier status."), | |
4cbe67e5 | 104 | options); |
105 | } | |
106 | ||
107 | GRUB_MOD_FINI(keystatus) | |
108 | { | |
109 | grub_unregister_extcmd (cmd); | |
110 | } |