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