jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <Kernel/Devices/HID/HIDManagement.h>
8#include <Kernel/Process.h>
9
10namespace Kernel {
11
12constexpr size_t map_name_max_size = 50;
13
14ErrorOr<FlatPtr> Process::sys$setkeymap(Userspace<Syscall::SC_setkeymap_params const*> user_params)
15{
16 VERIFY_NO_PROCESS_BIG_LOCK(this);
17 TRY(require_promise(Pledge::setkeymap));
18
19 auto credentials = this->credentials();
20 if (!credentials->is_superuser())
21 return EPERM;
22
23 auto params = TRY(copy_typed_from_user(user_params));
24
25 Keyboard::CharacterMapData character_map_data;
26
27 TRY(copy_n_from_user(character_map_data.map, params.map, CHAR_MAP_SIZE));
28 TRY(copy_n_from_user(character_map_data.shift_map, params.shift_map, CHAR_MAP_SIZE));
29 TRY(copy_n_from_user(character_map_data.alt_map, params.alt_map, CHAR_MAP_SIZE));
30 TRY(copy_n_from_user(character_map_data.altgr_map, params.altgr_map, CHAR_MAP_SIZE));
31 TRY(copy_n_from_user(character_map_data.shift_altgr_map, params.shift_altgr_map, CHAR_MAP_SIZE));
32
33 auto map_name = TRY(get_syscall_path_argument(params.map_name));
34 if (map_name->length() > map_name_max_size)
35 return ENAMETOOLONG;
36
37 HIDManagement::the().set_maps(move(map_name), character_map_data);
38 return 0;
39}
40
41ErrorOr<FlatPtr> Process::sys$getkeymap(Userspace<Syscall::SC_getkeymap_params const*> user_params)
42{
43 VERIFY_NO_PROCESS_BIG_LOCK(this);
44 TRY(require_promise(Pledge::getkeymap));
45 auto params = TRY(copy_typed_from_user(user_params));
46
47 return HIDManagement::the().keymap_data().with([&](auto const& keymap_data) -> ErrorOr<FlatPtr> {
48 if (params.map_name.size < keymap_data.character_map_name->length())
49 return ENAMETOOLONG;
50 TRY(copy_to_user(params.map_name.data, keymap_data.character_map_name->characters(), keymap_data.character_map_name->length()));
51
52 auto const& character_maps = keymap_data.character_map;
53 TRY(copy_to_user(params.map, character_maps.map, CHAR_MAP_SIZE * sizeof(u32)));
54 TRY(copy_to_user(params.shift_map, character_maps.shift_map, CHAR_MAP_SIZE * sizeof(u32)));
55 TRY(copy_to_user(params.alt_map, character_maps.alt_map, CHAR_MAP_SIZE * sizeof(u32)));
56 TRY(copy_to_user(params.altgr_map, character_maps.altgr_map, CHAR_MAP_SIZE * sizeof(u32)));
57 TRY(copy_to_user(params.shift_altgr_map, character_maps.shift_altgr_map, CHAR_MAP_SIZE * sizeof(u32)));
58 return 0;
59 });
60}
61
62}