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tuxedo-touchpad-switch/tuxedo-touchpad-switch-kde.cpp

299 lines
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// Copyright (c) 2020 TUXEDO Computers GmbH <tux@tuxedocomputers.com>
//
// This file is part of TUXEDO Touchpad Switch.
//
// This file is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// TUXEDO Touchpad Switch is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with TUXEDO Touchpad Switch. If not, see <https://www.gnu.org/licenses/>.
#include <linux/hidraw.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <signal.h>
#include <libudev.h>
#include <gio/gio.h>
#include <iostream>
#include <string>
#include <vector>
using std::cout;
using std::cerr;
using std::endl;
int lockfile;
gboolean isMousePluggedInPrev;
gboolean isEnabledSave;
static int get_touchpad_hidraw_devices(std::vector<std::string> *devnodes) {
int result = -EXIT_FAILURE;
struct udev *udev_context = udev_new();
if (!udev_context) {
cerr << "get_touchpad_hidraw_devices(...): udev_new(...) failed." << endl;
return result;
}
struct udev_enumerate *hidraw_devices = udev_enumerate_new(udev_context);
if (!hidraw_devices) {
cerr << "get_touchpad_hidraw_devices(...): udev_enumerate_new(...) failed." << endl;
}
else {
if (udev_enumerate_add_match_subsystem(hidraw_devices, "hidraw") < 0) {
cerr << "get_touchpad_hidraw_devices(...): udev_enumerate_add_match_subsystem(...) failed." << endl;
}
else {
if (udev_enumerate_scan_devices(hidraw_devices) < 0) {
cerr << "get_touchpad_hidraw_devices(...): udev_enumerate_scan_devices(...) failed." << endl;
}
else {
struct udev_list_entry *hidraw_devices_iterator = udev_enumerate_get_list_entry(hidraw_devices);
if (!hidraw_devices_iterator) {
cerr << "get_touchpad_hidraw_devices(...): udev_enumerate_get_list_entry(...) failed." << endl;
}
else {
struct udev_list_entry *hidraw_device_entry;
udev_list_entry_foreach(hidraw_device_entry, hidraw_devices_iterator) {
if (strstr(udev_list_entry_get_name(hidraw_device_entry), "i2c-UNIW0001:00")) {
struct udev_device *hidraw_device = udev_device_new_from_syspath(udev_context, udev_list_entry_get_name(hidraw_device_entry));
if (!hidraw_device) {
cerr << "get_touchpad_hidraw_devices(...): udev_device_new_from_syspath(...) failed." << endl;
}
else {
std::string devnode = udev_device_get_devnode(hidraw_device);
devnodes->push_back(devnode);
udev_device_unref(hidraw_device);
}
}
}
result = devnodes->size();
}
}
}
udev_enumerate_unref(hidraw_devices);
}
udev_unref(udev_context);
return result;
}
int set_touchpad_state(int enabled) {
std::vector<std::string> devnodes;
int touchpad_count = get_touchpad_hidraw_devices(&devnodes);
if (touchpad_count < 0) {
cerr << "send_events_handler(...): get_touchpad_hidraw_devices(...) failed." << endl;
return EXIT_FAILURE;
}
if (touchpad_count == 0) {
cout << "No compatible touchpads found." << endl;
return EXIT_FAILURE;
}
for (auto it = devnodes.begin(); it != devnodes.end(); ++it) {
int hidraw = open((*it).c_str(), O_WRONLY|O_NONBLOCK);
if (hidraw < 0) {
cerr << "send_events_handler(...): open(\"" << *it << "\", O_WRONLY|O_NONBLOCK) failed." << endl;
continue;
}
// default is to enable touchpad, for this send "0x03" as feature report nr.7 (0x07) to the touchpad hid device
char buffer[2] = {0x07, 0x00};
// change 0x03 to 0x00 to disable touchpad when configuration string starts with [d]isable
if (enabled) {
buffer[1] = 0x03;
}
int result = ioctl(hidraw, HIDIOCSFEATURE(sizeof(buffer)/sizeof(buffer[0])), buffer);
if (result < 0) {
cerr << "send_events_handler(...): ioctl(...) on " << *it << " failed." << endl;
close(hidraw);
continue;
}
close(hidraw);
}
return EXIT_SUCCESS;
}
void gracefull_exit(int signum) {
int result = set_touchpad_state(1);
if (flock(lockfile, LOCK_UN)) {
cerr << "main(...): flock(...) failed." << endl;
}
close(lockfile);
exit(result);
}
void kded5_modules_touchpad_handler(GDBusProxy *proxy, __attribute__((unused)) char *sender_name, char *signal_name, GVariant *parameters, __attribute__((unused)) gpointer user_data) {
if (!strcmp("enabledChanged", signal_name) && g_variant_is_of_type(parameters, (const GVariantType *)"(b)") && g_variant_n_children(parameters)) {
GVariant *enabledChanged = g_variant_get_child_value(parameters, 0);
isEnabledSave = g_variant_get_boolean(enabledChanged);
if (isEnabledSave) {
if (set_touchpad_state(1)) {
cerr << "kded5_modules_touchpad_handler(...): set_touchpad_state(...) failed." << endl;
}
}
else {
if (set_touchpad_state(0)) {
cerr << "kded5_modules_touchpad_handler(...): set_touchpad_state(...) failed." << endl;
}
}
g_variant_unref(enabledChanged);
}
else if (!strcmp("mousePluggedInChanged", signal_name) && g_variant_is_of_type(parameters, (const GVariantType *)"(b)") && g_variant_n_children(parameters)) {
GVariant *isMousePluggedInParam = g_dbus_proxy_call_sync(proxy, "isMousePluggedIn", NULL, G_DBUS_CALL_FLAGS_NONE, G_MAXINT, NULL, NULL);
if (isMousePluggedInParam != NULL && g_variant_is_of_type(isMousePluggedInParam, (const GVariantType *)"(b)") && g_variant_n_children(isMousePluggedInParam)) {
GVariant *isMousePluggedIn = g_variant_get_child_value(isMousePluggedInParam, 0);
if (!g_variant_get_boolean(isMousePluggedIn)) {
if (set_touchpad_state(1)) {
cerr << "kded5_modules_touchpad_handler(...): set_touchpad_state(...) failed." << endl;
}
if (flock(lockfile, LOCK_UN)) {
cerr << "kded5_modules_touchpad_handler(...): flock(...) failed." << endl;
}
}
else if (!isMousePluggedInPrev) {
if (flock(lockfile, LOCK_EX)) {
cerr << "kded5_modules_touchpad_handler(...): flock(...) failed." << endl;
}
if (set_touchpad_state(isEnabledSave)) {
cerr << "kded5_modules_touchpad_handler(...): set_touchpad_state(...) failed." << endl;
}
}
isMousePluggedInPrev = g_variant_get_boolean(isMousePluggedIn);
g_variant_unref(isMousePluggedIn);
g_variant_unref(isMousePluggedInParam);
}
else {
cerr << "kded5_modules_touchpad_handler(...): g_dbus_proxy_call_sync(...) failed." << endl;
}
}
}
int kded5_modules_touchpad_init(GDBusProxy *proxy) {
GVariant *isEnabledParam = g_dbus_proxy_call_sync(proxy, "isEnabled", NULL, G_DBUS_CALL_FLAGS_NONE, G_MAXINT, NULL, NULL);
if (isEnabledParam != NULL && g_variant_is_of_type(isEnabledParam, (const GVariantType *)"(b)") && g_variant_n_children(isEnabledParam)) {
GVariant *isEnabled = g_variant_get_child_value(isEnabledParam, 0);
// init isEnabledSave
isEnabledSave = g_variant_get_boolean(isEnabled);
if (isEnabledSave) {
if (set_touchpad_state(1)) {
cerr << "kded5_modules_touchpad_handler(...): set_touchpad_state(...) failed." << endl;
return EXIT_FAILURE;
}
}
else {
if (set_touchpad_state(0)) {
cerr << "kded5_modules_touchpad_handler(...): set_touchpad_state(...) failed." << endl;
return EXIT_FAILURE;
}
}
g_variant_unref(isEnabled);
g_variant_unref(isEnabledParam);
}
else {
cerr << "kded5_modules_touchpad_handler(...): g_dbus_proxy_call_sync(...) failed." << endl;
return EXIT_FAILURE;
}
GVariant *isMousePluggedInParam = g_dbus_proxy_call_sync(proxy, "isMousePluggedIn", NULL, G_DBUS_CALL_FLAGS_NONE, G_MAXINT, NULL, NULL);
if (isMousePluggedInParam != NULL && g_variant_is_of_type(isMousePluggedInParam, (const GVariantType *)"(b)") && g_variant_n_children(isMousePluggedInParam)) {
GVariant *isMousePluggedIn = g_variant_get_child_value(isMousePluggedInParam, 0);
// init isMousePluggedInPrev, should always be true on init, this is here to be on the save side
isMousePluggedInPrev = g_variant_get_boolean(isMousePluggedIn);
// isMousePluggedInPrev just got init so it holds the current value
if (!isMousePluggedInPrev) {
if (set_touchpad_state(1)) {
cerr << "kded5_modules_touchpad_handler(...): set_touchpad_state(...) failed." << endl;
return EXIT_FAILURE;
}
if (flock(lockfile, LOCK_UN)) {
cerr << "kded5_modules_touchpad_handler(...): flock(...) failed." << endl;
return EXIT_FAILURE;
}
}
g_variant_unref(isMousePluggedIn);
g_variant_unref(isMousePluggedInParam);
}
else {
cerr << "kded5_modules_touchpad_handler(...): g_dbus_proxy_call_sync(...) failed." << endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
int main() {
lockfile = open("/etc/tuxedo-touchpad-switch-lockfile", O_RDONLY);
if (lockfile < 0) {
cerr << "main(...): open(...) failed." << endl;
gracefull_exit(0);
}
//FIXME singal(...) deprecated -> man signal
signal(SIGINT, gracefull_exit);
signal(SIGTERM, gracefull_exit);
if (flock(lockfile, LOCK_EX)) {
cerr << "main(...): flock(...) failed." << endl;
gracefull_exit(0);
}
// sync on config change, xsession change, and wakeup kde
GDBusProxy *kded5_modules_touchpad = g_dbus_proxy_new_for_bus_sync(G_BUS_TYPE_SESSION,
G_DBUS_PROXY_FLAGS_NONE, NULL,
"org.kde.kded5",
"/modules/touchpad",
"org.kde.touchpad",
NULL, NULL);
if (kded5_modules_touchpad == NULL) {
cerr << "main(...): g_dbus_proxy_new_for_bus_sync(...) failed." << endl;
gracefull_exit(0);
}
if (g_signal_connect(kded5_modules_touchpad, "g-signal", G_CALLBACK(kded5_modules_touchpad_handler), NULL) < 1) {
cerr << "main(...): g_signal_connect(...) failed." << endl;
gracefull_exit(0);
}
// sync on start
if (kded5_modules_touchpad_init(kded5_modules_touchpad) == EXIT_FAILURE) {
cerr << "main(...): kded5_modules_touchpad_init(...) failed." << endl;
gracefull_exit(0);
}
// start empty glib mainloop, required for glib signals to be catched
GMainLoop *app = g_main_loop_new(NULL, TRUE);
if (!app) {
cerr << "main(...): g_main_loop_new(...) failed." << endl;
gracefull_exit(0);
}
g_main_loop_run(app);
// g_main_loop_run only returns on error
cerr << "main(...): g_main_loop_run(...) failed." << endl;
gracefull_exit(0);
}