ladybird/Userland/keymap.cpp
Andreas Kling 7dd49047f3 keymap: Fix crash introduced by 637ecdb
Just because a Vector has some inline capacity doesn't mean we can put
data at offsets < Vector::size().

Fixes #2104.
2020-05-05 00:12:51 +02:00

137 lines
4.4 KiB
C++

/*
* 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 <AK/JsonObject.h>
#include <LibCore/File.h>
#include <stdio.h>
#include <AK/Optional.h>
#include <AK/StdLibExtras.h>
#include <AK/Vector.h>
#include <AK/kmalloc.h>
#include <Kernel/Syscall.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
static Vector<char> read_map(const JsonObject& json, const String& name)
{
if (!json.has(name))
return {};
Vector<char, 0x80> map;
map.resize(0x80);
auto map_arr = json.get(name).as_array();
for (int i = 0; i < map_arr.size(); i++) {
auto key_value = map_arr.at(i).as_string();
char character = 0;
if (key_value.length() == 0) {
;
} else if (key_value.length() == 1) {
character = key_value.characters()[0];
} else if (key_value.length() == 4) {
// FIXME: Replace this workaround with "\u001B" in the keymap files
// after these kind of escape sequences are implemented in JsonParser.
if (key_value == "0x1B") {
character = 0x1B;
}
} else {
fprintf(stderr, "Unknown character in %s[%u] = %s.\n", name.characters(), i, key_value.characters());
ASSERT_NOT_REACHED();
}
map[i] = character;
}
return map;
}
static RefPtr<Core::File> open_keymap_file(String& filename)
{
auto file = Core::File::construct(filename);
if (file->open(Core::IODevice::ReadOnly))
return file;
if (!filename.ends_with(".json")) {
StringBuilder full_path;
full_path.append("/res/keymaps/");
full_path.append(filename);
full_path.append(".json");
filename = full_path.to_string();
file = Core::File::construct(filename);
if (file->open(Core::IODevice::ReadOnly))
return file;
}
return file;
}
static int read_map_from_file(String& filename)
{
auto file = open_keymap_file(filename);
if (!file->is_open()) {
fprintf(stderr, "Failed to open %s: %s\n", filename.characters(), file->error_string());
return 1;
}
auto file_contents = file->read_all();
auto json = JsonValue::from_string(file_contents).as_object();
auto map = read_map(json, "map");
auto shift_map = read_map(json, "shift_map");
auto alt_map = read_map(json, "alt_map");
auto altgr_map = read_map(json, "altgr_map");
if (altgr_map.is_empty()) {
// AltGr map was not found, using Alt map as fallback.
altgr_map = alt_map;
}
Syscall::SC_setkeymap_params params { map.data(), shift_map.data(), alt_map.data(), altgr_map.data() };
return syscall(SC_setkeymap, &params);
}
int main(int argc, char** argv)
{
if (argc != 2) {
fprintf(stderr, "usage: keymap <name|file>\n");
return 0;
}
String filename = argv[1];
int ret_val = read_map_from_file(filename);
if (ret_val == -EPERM)
fprintf(stderr, "Permission denied.\n");
if (ret_val == 0)
fprintf(stderr, "New keymap loaded from \"%s\".\n", filename.characters());
return ret_val;
}