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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2013-07-24 17:18:09 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2013-07-24 17:18:09 -0500
commit7816ebcadcc73387debb97e1fdb79569e7440018 (patch)
treef9201b492a02aa5287679997abe9bb91f3b1600a /tdekbdledsync/main.cpp
parent0d3ebd90203be2314e9c9fece66216f36dab3abe (diff)
downloadtdebase-7816ebcadcc73387debb97e1fdb79569e7440018.tar.gz
tdebase-7816ebcadcc73387debb97e1fdb79569e7440018.zip
Add highly experimental tdekbdledsync application
Diffstat (limited to 'tdekbdledsync/main.cpp')
-rw-r--r--tdekbdledsync/main.cpp182
1 files changed, 182 insertions, 0 deletions
diff --git a/tdekbdledsync/main.cpp b/tdekbdledsync/main.cpp
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+/*
+Copyright 2011-2013 Timothy Pearson <kb9vqf@pearsoncomputing.net>
+
+This file is part of tdekbdledsync, the TDE Keyboard LED Synchronization Daemon
+
+tdekbdledsync 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.
+
+tdekbdledsync 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 tdekbdledsync. If not, see http://www.gnu.org/licenses/.
+
+*/
+
+// The idea here is to periodically read the Xorg core keyboard state, and then forcibly set the physical LED states on all attached keyboards to match (via the event interface)
+// Once every half second should work well enough on most systems
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <exception>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <dirent.h>
+#include <linux/input.h>
+#include <linux/uinput.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/select.h>
+#include <sys/time.h>
+#include <termios.h>
+#include <signal.h>
+extern "C" {
+#include <libudev.h>
+}
+#include <libgen.h>
+
+#include <X11/Xlib.h>
+#include <X11/XKBlib.h>
+#include <X11/extensions/XTest.h>
+#include <X11/keysym.h>
+
+using namespace std;
+
+// WARNING
+// MAX_KEYBOARDS must be greater than or equal to MAX_INPUT_NODE
+#define MAX_KEYBOARDS 128
+#define MAX_INPUT_NODE 128
+
+#define TestBit(bit, array) (array[(bit) / 8] & (1 << ((bit) % 8)))
+
+typedef unsigned char byte;
+
+char filename[32];
+char key_bitmask[(KEY_MAX + 7) / 8];
+
+int keyboard_fd_num;
+int keyboard_fds[MAX_KEYBOARDS];
+
+Display* display = NULL;
+
+int find_keyboards() {
+ int i, j;
+ int fd;
+
+ keyboard_fd_num = 0;
+ for (i=0; i<MAX_KEYBOARDS; i++) {
+ keyboard_fds[i] = 0;
+ }
+
+ for (i=0; i<MAX_INPUT_NODE; i++) {
+ snprintf(filename, sizeof(filename), "/dev/input/event%d", i);
+
+ fd = open(filename, O_RDWR|O_SYNC);
+ if (fd >= 0) {
+ ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask);
+
+ struct input_id input_info;
+ ioctl (fd, EVIOCGID, &input_info);
+ if ((input_info.vendor != 0) && (input_info.product != 0)) {
+ /* We assume that anything that has an alphabetic key in the
+ QWERTYUIOP range in it is the main keyboard. */
+ for (j = KEY_Q; j <= KEY_P; j++) {
+ if (TestBit(j, key_bitmask)) {
+ keyboard_fds[keyboard_fd_num] = fd;
+ }
+ }
+ }
+
+ if (keyboard_fds[keyboard_fd_num] == 0) {
+ close(fd);
+ }
+ else {
+ keyboard_fd_num++;
+ }
+ }
+ }
+ return 0;
+}
+
+int main() {
+ int current_keyboard;
+ char name[256] = "Unknown";
+ unsigned int states;
+ struct input_event ev;
+
+ bool num_lock_set = false;
+ bool caps_lock_set = false;
+ bool scroll_lock_set = false;
+
+ // Open X11 display
+ display = XOpenDisplay(NULL);
+ if (!display) {
+ printf ("[tdekbdledsync] Unable to open X11 display!\n");
+ return -1;
+ }
+
+ // Find keyboards
+ find_keyboards();
+ if (keyboard_fd_num == 0) {
+ printf ("[tdekbdledsync] Could not find any usable keyboard(s)!\n");
+ return -2;
+ }
+ else {
+ fprintf(stderr, "[tdekbdledsync] Found %d keyboard(s)\n", keyboard_fd_num);
+
+ for (current_keyboard=0;current_keyboard<keyboard_fd_num;current_keyboard++) {
+ // Print device name
+ ioctl(keyboard_fds[current_keyboard], EVIOCGNAME (sizeof (name)), name);
+ fprintf(stderr, "[tdekbdledsync] Syncing keyboard: (%s)\n", name);
+ }
+
+ while (1) {
+ // Get Virtual Core keyboard status
+ if (XkbGetIndicatorState(display, XkbUseCoreKbd, &states) != Success) {
+ fprintf(stderr, "[tdekbdledsync] Unable to query X11 Virtual Core keyboard!\n");
+ return -3;
+ }
+
+ // From "xset -q"
+ caps_lock_set = (states & 0x01);
+ num_lock_set = (states & 0x02);
+ scroll_lock_set = (states & 0x04);
+
+ for (current_keyboard=0;current_keyboard<keyboard_fd_num;current_keyboard++) {
+ // Set LEDs
+ ev.type = EV_LED;
+ ev.code = LED_CAPSL;
+ ev.value = caps_lock_set;
+ if (write(keyboard_fds[current_keyboard], &ev, sizeof(ev)) < 0) {
+ fprintf(stderr, "[tdekbdledsync] Unable to set LED state\n");
+ }
+
+ ev.type = EV_LED;
+ ev.code = LED_NUML;
+ ev.value = num_lock_set;
+ if (write(keyboard_fds[current_keyboard], &ev, sizeof(ev)) < 0) {
+ fprintf(stderr, "[tdekbdledsync] Unable to set LED state\n");
+ }
+
+ ev.type = EV_LED;
+ ev.code = LED_SCROLLL;
+ ev.value = scroll_lock_set;
+ if (write(keyboard_fds[current_keyboard], &ev, sizeof(ev)) < 0) {
+ fprintf(stderr, "[tdekbdledsync] Unable to set LED state\n");
+ }
+ }
+
+ usleep(500*1000);
+ }
+ }
+
+ return 0;
+} \ No newline at end of file