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-rw-r--r--tsak/main.cpp383
1 files changed, 0 insertions, 383 deletions
diff --git a/tsak/main.cpp b/tsak/main.cpp
deleted file mode 100644
index f96cf23..0000000
--- a/tsak/main.cpp
+++ /dev/null
@@ -1,383 +0,0 @@
-/*
-Copyright 2010 Adam Marchetti
-Copyright 2011 Timothy Pearson <kb9vqf@pearsoncomputing.net>
-
-This file is part of tsak.
-
-tsak 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.
-
-tsak 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 tsak. If not, see http://www.gnu.org/licenses/.
-
-*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#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>
-
-#define FIFO_DIR "/tmp/tdesocket-global"
-#define FIFO_FILE_OUT "/tmp/tdesocket-global/tsak"
-
-#define TestBit(bit, array) (array[(bit) / 8] & (1 << ((bit) % 8)))
-
-typedef unsigned char byte;
-
-bool mPipeOpen_out = false;
-int mPipe_fd_out = -1;
-
-struct sigaction usr_action;
-sigset_t block_mask;
-
-const char *keycode[256] =
-{
- "", "<esc>", "1", "2", "3", "4", "5", "6", "7", "8",
- "9", "0", "−", "=", "<backspace>", "<tab>", "q", "w", "e", "r",
- "t", "y", "u", "i", "o", "p", "[", "]", "\n", "<control>",
- "a", "s", "d", "f", "g", "h", "j", "k", "l", ";",
- "'", "", "<shift>", "\\", "z", "x", "c", "v", "b", "n",
- "m", ",", ".", "/", "<shift>", "", "<alt>", " ", "<capslock>",
- "<f1>", "<f2>", "<f3>", "<f4>", "<f5>", "<f6>", "<f7>", "<f8>", "<f9>", "<f10>",
- "<numlock>", "<scrolllock>", "", "", "", "", "", "", "", "",
- "", "", "\\", "f11", "f12", "", "", "", "", "",
- "", "", "", "<control>", "", "<sysrq>", "", "", "<control>", "", "",
- "<alt>", "", "", "", "", "", "", "", "", "",
- "", "<del>", "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "", "", "",
- "", "", "", "", "", "", "", "", "", ""
-};
-
-/* returns 1 if bit number i is set, otherwise returns 0 */
-int bit_set(size_t i, const byte* a)
-{
- return a[i/CHAR_BIT] & (1 << i%CHAR_BIT);
-}
-
-/* Assign features (supported axes and keys) of the physical input device (devin)
- * to the virtual input device (devout) */
-static void copy_features(int devin, int devout)
-{
- byte evtypes[EV_MAX/CHAR_BIT + 1] = {0};
- byte codes[KEY_MAX/CHAR_BIT + 1];
- unsigned i,code;
- int op;
- if (ioctl(devin, EVIOCGBIT(0, sizeof(evtypes)), evtypes) < 0) return;
- for(i=0;i<EV_MAX;++i) {
- if (bit_set(i, evtypes)) {
- switch(i) {
- case EV_KEY: op = UI_SET_KEYBIT; break;
- case EV_REL: op = UI_SET_RELBIT; break;
- case EV_ABS: op = UI_SET_ABSBIT; break;
- case EV_MSC: op = UI_SET_MSCBIT; break;
- case EV_LED: op = UI_SET_LEDBIT; break;
- case EV_SND: op = UI_SET_SNDBIT; break;
- case EV_SW: op = UI_SET_SWBIT; break;
- default: op = -1;
- }
- }
- if (op == -1) continue;
- ioctl(devout, UI_SET_EVBIT, i);
- memset(codes,0,sizeof(codes));
- if (ioctl(devin, EVIOCGBIT(i, sizeof(codes)), codes) < 0) return;
- for(code=0;code<KEY_MAX;code++) {
- if (bit_set(code, codes)) ioctl(devout, op, code);
- }
- }
-}
-
-int find_keyboard() {
- int i, j;
- int fd;
- char filename[32];
- char key_bitmask[(KEY_MAX + 7) / 8];
-
- for (i=0; i<32; i++) {
- snprintf(filename,sizeof(filename), "/dev/input/event%d", i);
-
- fd = open(filename, O_RDWR|O_SYNC);
- ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(key_bitmask)), key_bitmask);
-
- /* 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))
- return fd;
- }
-
- close (fd);
- }
- return 0;
-}
-
-void tearDownPipe()
-{
- if (mPipeOpen_out == true) {
- mPipeOpen_out = false;
- close(mPipe_fd_out);
- unlink(FIFO_FILE_OUT);
- }
-}
-
-bool setFileLock(int fd, bool close_on_failure)
-{
- struct flock fl;
-
- fl.l_type = F_WRLCK;
- fl.l_whence = SEEK_SET;
- fl.l_start = 0;
- fl.l_len = 1;
-
- // Set the exclusive file lock
- if (fcntl(mPipe_fd_out, F_SETLK, &fl) == -1) {
- close(mPipe_fd_out);
- return false;
- }
-
- return true;
-}
-
-bool checkFileLock()
-{
- struct flock fl;
-
- fl.l_type = F_WRLCK; /* Test for any lock on any part of file. */
- fl.l_start = 0;
- fl.l_whence = SEEK_SET;
- fl.l_len = 0;
-
- int fd = open(FIFO_FILE_OUT, O_RDWR | O_NONBLOCK);
- fcntl(fd, F_GETLK, &fl); /* Overwrites lock structure with preventors. */
-
- if (fd > -1) {
- if (fl.l_type == F_WRLCK) {
- return false;
- }
- return true;
- }
-
- return true;
-}
-
-bool setupPipe()
-{
- /* Create the FIFOs if they do not exist */
- umask(0);
- mkdir(FIFO_DIR,0644);
-
- mknod(FIFO_FILE_OUT, S_IFIFO|0600, 0);
- chmod(FIFO_FILE_OUT, 0600);
-
- mPipe_fd_out = open(FIFO_FILE_OUT, O_RDWR | O_NONBLOCK);
- if (mPipe_fd_out > -1) {
- mPipeOpen_out = true;
- }
-
- // Set the exclusive file lock
- return setFileLock(mPipe_fd_out, true);
-}
-
-class PipeHandler
-{
-public:
- PipeHandler();
- ~PipeHandler();
-};
-
-PipeHandler::PipeHandler()
-{
-}
-
-PipeHandler::~PipeHandler()
-{
- tearDownPipe();
-}
-
-int main (int argc, char *argv[])
-{
- struct input_event ev[64];
- struct input_event event;
- struct uinput_user_dev devinfo={0};
- int fd, devout, rd, value, size = sizeof (struct input_event);
- char name[256] = "Unknown";
- bool ctrl_down = false;
- bool alt_down = false;
- bool hide_event = false;
- bool established = false;
- bool testrun = false;
-
- if (argc == 2) {
- if (strcmp(argv[1], "checkactive") == 0) {
- testrun = true;
- }
- }
-
- // Check for existing file locks
- if (!checkFileLock()) {
- fprintf(stderr, "Another instance of this program is already running\n");
- return 8;
- }
-
- // Create the output pipe
- PipeHandler controlpipe;
- if (!setupPipe()) {
- fprintf(stderr, "Another instance of this program is already running\n");
- return 8;
- }
-
- while (1) {
- if ((getuid ()) != 0) {
- printf ("You are not root! This WILL NOT WORK!\nDO NOT attempt to bypass security restrictions, e.g. by changing keyboard permissions or owner, if you want the SAK system to remain secure...\n");
- return 5;
- }
-
- // Open Device
- fd = find_keyboard();
- if (fd == -1) {
- printf ("Could not find your keyboard!\n");
- if (established)
- sleep(1);
- else
- return 4;
- }
- else {
- // Print Device Name
- ioctl (fd, EVIOCGNAME (sizeof (name)), name);
- fprintf(stderr, "Reading From : (%s)\n", name);
-
- // Create filtered virtual output device
- devout=open("/dev/misc/uinput",O_WRONLY|O_NONBLOCK);
- if (devout<0) {
- perror("open(\"/dev/misc/uinput\")");
- devout=open("/dev/uinput",O_WRONLY|O_NONBLOCK);
- }
- if (devout<0) {
- fprintf(stderr,"Unable to open /dev/uinput or /dev/misc/uinput (char device 10:223).\nPossible causes:\n 1) Device node does not exist\n 2) Kernel not compiled with evdev [INPUT_EVDEV] and uinput [INPUT_UINPUT] user level driver support\n 3) Permission denied.\n");
- perror("open(\"/dev/uinput\")");
- if (established)
- sleep(1);
- else
- return 3;
- }
- else {
- if(ioctl(fd, EVIOCGRAB, 2) < 0) {
- close(fd);
- fprintf(stderr, "Failed to grab exclusive input device lock");
- if (established)
- sleep(1);
- else
- return 1;
- }
- else {
- ioctl(fd, EVIOCGNAME(UINPUT_MAX_NAME_SIZE), devinfo.name);
- strncat(devinfo.name, "+tsak", UINPUT_MAX_NAME_SIZE-1);
- fprintf(stderr, "%s\n", devinfo.name);
- ioctl(fd, EVIOCGID, &devinfo.id);
-
- copy_features(fd, devout);
- write(devout,&devinfo,sizeof(devinfo));
- if (ioctl(devout,UI_DEV_CREATE)<0) {
- fprintf(stderr,"Unable to create input device with UI_DEV_CREATE\n");
- if (established)
- sleep(1);
- else
- return 2;
- }
- else {
- fprintf(stderr,"Device created.\n");
-
- if (established == false) {
- tearDownPipe();
- int i=fork();
- if (i<0) return 9; // fork failed
- if (i>0) {
- // close parent process
- close(mPipe_fd_out);
- return 0;
- }
- setupPipe();
- }
-
- established = true;
-
- if (testrun == true) {
- return 0;
- }
-
- while (1) {
- if ((rd = read (fd, ev, size * 2)) < size) {
- fprintf(stderr,"Read failed.\n");
- break;
- }
-
- value = ev[0].value;
-
- if (value != ' ' && ev[1].value == 0 && ev[1].type == 1){ // Read the key release event
- if (keycode[(ev[1].code)]) {
- if (strcmp(keycode[(ev[1].code)], "<control>") == 0) ctrl_down = false;
- if (strcmp(keycode[(ev[1].code)], "<alt>") == 0) alt_down = false;
- }
- }
- if (value != ' ' && ev[1].value == 1 && ev[1].type == 1){ // Read the key press event
- if (keycode[(ev[1].code)]) {
- if (strcmp(keycode[(ev[1].code)], "<control>") == 0) ctrl_down = true;
- if (strcmp(keycode[(ev[1].code)], "<alt>") == 0) alt_down = true;
- }
- }
-
- hide_event = false;
- if (keycode[(ev[1].code)]) {
- if (alt_down && ctrl_down && (strcmp(keycode[(ev[1].code)], "<del>") == 0)) {
- hide_event = true;
- }
- }
-
- if (hide_event == false) {
- // Pass the event on...
- event = ev[0];
- write(devout, &event, sizeof event);
- event = ev[1];
- write(devout, &event, sizeof event);
- }
- if (hide_event == true) {
- // Let anyone listening to our interface know that an SAK keypress was received
- // I highly doubt there are more than 255 VTs active at once...
- int i;
- for (i=0;i<255;i++) {
- write(mPipe_fd_out, "SAK\n\r", 6);
- }
- }
- }
- }
- }
- }
- }
- }
-
- return 6;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 01:23:01 +0000