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Kernel+LibKeyboard: Enable querying the current keymap

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Ben Wiederhake 2021-01-30 21:35:54 +01:00 • committed by Andreas Kling
parent d47ed35801
commit a2c21a55e1
6 changed files with 46 additions and 2 deletions
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100
Kernel/Syscalls/keymap.cpp Normal file
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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/Devices/KeyboardDevice.h>
#include <Kernel/Process.h>
namespace Kernel {
constexpr size_t map_name_max_size = 50;
int Process::sys$setkeymap(Userspace<const Syscall::SC_setkeymap_params*> user_params)
{
REQUIRE_PROMISE(setkeymap);
if (!is_superuser())
return -EPERM;
Syscall::SC_setkeymap_params params;
if (!copy_from_user(&params, user_params))
return -EFAULT;
Keyboard::CharacterMapData character_map_data;
if (!copy_from_user(character_map_data.map, params.map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (!copy_from_user(character_map_data.shift_map, params.shift_map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (!copy_from_user(character_map_data.alt_map, params.alt_map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (!copy_from_user(character_map_data.altgr_map, params.altgr_map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (!copy_from_user(character_map_data.shift_altgr_map, params.shift_altgr_map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
auto map_name = get_syscall_path_argument(params.map_name);
if (map_name.is_error()) {
return map_name.error();
}
if (map_name.value().length() > map_name_max_size) {
return -ENAMETOOLONG;
}
KeyboardDevice::the().set_maps(character_map_data, map_name.value());
return 0;
}
int Process::sys$getkeymap(Userspace<const Syscall::SC_getkeymap_params*> user_params)
{
REQUIRE_PROMISE(stdio);
Syscall::SC_getkeymap_params params;
if (!copy_from_user(&params, user_params))
return -EFAULT;
String keymap_name = KeyboardDevice::the().keymap_name();
const Keyboard::CharacterMapData& character_maps = KeyboardDevice::the().character_maps();
if (!copy_to_user(params.map, character_maps.map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (!copy_to_user(params.shift_map, character_maps.shift_map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (!copy_to_user(params.alt_map, character_maps.alt_map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (!copy_to_user(params.altgr_map, character_maps.altgr_map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (!copy_to_user(params.shift_altgr_map, character_maps.shift_altgr_map, CHAR_MAP_SIZE * sizeof(u32)))
return -EFAULT;
if (params.map_name.size < keymap_name.length())
return -ENAMETOOLONG;
if (!copy_to_user(params.map_name.data, keymap_name.characters(), keymap_name.length()))
return -EFAULT;
return 0;
}
}