ladybird/Kernel/Syscalls/keymap.cpp

63 lines
2.4 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Devices/HID/Management.h>
#include <Kernel/Tasks/Process.h>
namespace Kernel {
constexpr size_t map_name_max_size = 50;
ErrorOr<FlatPtr> Process::sys$setkeymap(Userspace<Syscall::SC_setkeymap_params const*> user_params)
{
VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::setkeymap));
auto credentials = this->credentials();
if (!credentials->is_superuser())
return EPERM;
auto params = TRY(copy_typed_from_user(user_params));
Keyboard::CharacterMapData character_map_data;
TRY(copy_n_from_user(character_map_data.map, params.map, CHAR_MAP_SIZE));
TRY(copy_n_from_user(character_map_data.shift_map, params.shift_map, CHAR_MAP_SIZE));
TRY(copy_n_from_user(character_map_data.alt_map, params.alt_map, CHAR_MAP_SIZE));
TRY(copy_n_from_user(character_map_data.altgr_map, params.altgr_map, CHAR_MAP_SIZE));
TRY(copy_n_from_user(character_map_data.shift_altgr_map, params.shift_altgr_map, CHAR_MAP_SIZE));
auto map_name = TRY(get_syscall_path_argument(params.map_name));
if (map_name->length() > map_name_max_size)
return ENAMETOOLONG;
HIDManagement::the().set_maps(move(map_name), character_map_data);
return 0;
}
ErrorOr<FlatPtr> Process::sys$getkeymap(Userspace<Syscall::SC_getkeymap_params const*> user_params)
{
VERIFY_NO_PROCESS_BIG_LOCK(this);
TRY(require_promise(Pledge::getkeymap));
auto params = TRY(copy_typed_from_user(user_params));
return HIDManagement::the().keymap_data().with([&](auto const& keymap_data) -> ErrorOr<FlatPtr> {
if (params.map_name.size < keymap_data.character_map_name->length())
return ENAMETOOLONG;
TRY(copy_to_user(params.map_name.data, keymap_data.character_map_name->characters(), keymap_data.character_map_name->length()));
auto const& character_maps = keymap_data.character_map;
TRY(copy_n_to_user(params.map, character_maps.map, CHAR_MAP_SIZE));
TRY(copy_n_to_user(params.shift_map, character_maps.shift_map, CHAR_MAP_SIZE));
TRY(copy_n_to_user(params.alt_map, character_maps.alt_map, CHAR_MAP_SIZE));
TRY(copy_n_to_user(params.altgr_map, character_maps.altgr_map, CHAR_MAP_SIZE));
TRY(copy_n_to_user(params.shift_altgr_map, character_maps.shift_altgr_map, CHAR_MAP_SIZE));
return 0;
});
}
}