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Code Issues Releases Wiki Activity

Make tsak a bit more robust

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pull/1/head
Timothy Pearson 13 years ago
parent d54faa8114
commit 8685539c5e
1 changed files with 111 additions and 78 deletions
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191
tsak/main.cpp
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@ -184,97 +184,130 @@ int main (int argc, char *argv[])
bool ctrl_down = false; bool ctrl_down = false;
bool alt_down = false; bool alt_down = false;
bool hide_event = false; bool hide_event = false;
bool established = false;
bool testrun = false;
// Create the output pipe if (argc == 2) {
PipeHandler controlpipe; if (strcmp(argv[1], "checkactive") == 0) {
testrun = true;
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");
}
// Print Device Name
ioctl (fd, EVIOCGNAME (sizeof (name)), name);
printf ("Reading From : (%s)\n", name);
// Create filtered virtual output device
devout=open("/dev/misc/uinput",O_WRONLY|O_NONBLOCK);
if (devout<0) {
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: Device node inexistent or kernel not compiled with evdev user level driver support or permission denied.\n");
perror("open(\"/dev/misc/uinput\")");
return 3;
} }
} }
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");
return 2;
}
else {
fprintf(stderr,"Device created.\n");
}
if(ioctl(fd, EVIOCGRAB, 2) < 0) { // Create the output pipe
close(fd); PipeHandler controlpipe;
fprintf(stderr, "Failed to grab exclusive input device lock");
return 1;
}
while (1) { while (1) {
if ((getuid ()) != 0) {
if ((rd = read (fd, ev, size * 2)) < size) { 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");
fprintf(stderr,"Read failed.\n"); return 5;
return 1;
} }
value = ev[0].value; // Open Device
fd = find_keyboard();
if (value != ' ' && ev[1].value == 0 && ev[1].type == 1){ // Read the key release event if (fd == -1) {
if (keycode[(ev[1].code)]) { printf ("Could not find your keyboard!\n");
if (strcmp(keycode[(ev[1].code)], "<control>") == 0) ctrl_down = false; if (established)
if (strcmp(keycode[(ev[1].code)], "<alt>") == 0) alt_down = false; sleep(1);
} else
return 4;
} }
if (value != ' ' && ev[1].value == 1 && ev[1].type == 1){ // Read the key press event else {
if (keycode[(ev[1].code)]) { // Print Device Name
if (strcmp(keycode[(ev[1].code)], "<control>") == 0) ctrl_down = true; ioctl (fd, EVIOCGNAME (sizeof (name)), name);
if (strcmp(keycode[(ev[1].code)], "<alt>") == 0) alt_down = true; printf ("Reading From : (%s)\n", name);
// Create filtered virtual output device
devout=open("/dev/misc/uinput",O_WRONLY|O_NONBLOCK);
if (devout<0) {
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: Device node inexistent or kernel not compiled with evdev user level driver support or permission denied.\n");
hide_event = false; perror("open(\"/dev/misc/uinput\")");
if (keycode[(ev[1].code)]) { if (established)
if (alt_down && ctrl_down && (strcmp(keycode[(ev[1].code)], "<del>") == 0)) { sleep(1);
hide_event = true; else
return 3;
}
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(ioctl(fd, EVIOCGRAB, 2) < 0) {
close(fd);
fprintf(stderr, "Failed to grab exclusive input device lock");
if (established)
sleep(1);
else
return 1;
}
else {
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
write(mPipe_fd_out, "SAK\n\r", 6);
}
}
}
}
} }
}
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
write(mPipe_fd_out, "SAK\n\r", 6);
} }
} }
return 0; return 6;
} }

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