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robbyjo
Guru
Joined: 06 Apr 2003
Posts: 462
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 Posted: Wed Jun 22, 2005 10:25 pm Post subject: |
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| Perhaps we can set the duplication to 3 or 4. But I can hardly think of words that has 3 identical letters in a row, except perhaps Kashyyyk. Hmm... |
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alinv
Guru
Joined: 19 Nov 2002
Posts: 395
Location: Bucharest
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| Posted: Wed Jun 22, 2005 10:31 pm Post subject: |
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| robbyjo wrote: | | Perhaps we can set the duplication to 3 or 4. But I can hardly think of words that has 3 identical letters in a row, except perhaps Kashyyyk. Hmm... |
What about numbers like 1000000 or hex AAAABBBB1111...?
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mirko_3
l33t
Joined: 02 Nov 2003
Posts: 605
Location: Birreria
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| Posted: Thu Jun 23, 2005 2:23 pm Post subject: |
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I mean... do you really need it to be that precise?
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Redeeman
l33t
Joined: 25 Sep 2003
Posts: 958
Location: Portugal
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| Posted: Thu Jun 23, 2005 2:37 pm Post subject: |
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| isnt it possible to catch a keypress event so that you just increment each time a key is pressed, and ignore the repeat thing? |
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dsf
n00b
Joined: 16 Nov 2004
Posts: 21
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| Posted: Fri Jun 24, 2005 1:10 am Post subject: |
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People are indeed correct about the bug with repeats -- good eye and catch. 
Right now, the code assumes that if it has seen the same character before, that it is a repeat. This was required because of the way the code is written to ignore the actual keypress repeat events.
It could probably be restructured differently in some way, along with an additional check or two, and perhaps adding an additional variable or two to track this stuff.
So I will leave this as an exercise in code modification for anyone that may be interested in fixing it. Shouldn't be too hard. |
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rihteri
n00b
Joined: 01 Jun 2003
Posts: 36
Location: Seinäjoki, Finland
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| Posted: Thu Oct 13, 2005 12:31 pm Post subject: |
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Nice hacks, but if you really only want to count the keystrokes, try this little python script I wrote inspired by dsf:s comment about doing this in userspace. Seems the problem is really simple.
| Code: |
i=0
event=file('/dev/input/event0','r')
while (1):
event.read(96)
i=i+1
print i
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Of course this only starts counting when it is started. Output could be better as well. But I think it counts right. You might have to alter the read size if you have non-i386-32bit processor, I think. And change the device if needed.
EDIT:
Seems like the event interface also outputs the time an event occurs.
| Code: |
struct input_event {
struct timeval time;
__u16 type;
__u16 code;
__s32 value;
};
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Who wants to write a script to draw a graph of keystrokes relative to time? =)
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zojas
Veteran
Joined: 22 Apr 2002
Posts: 1138
Location: Phoenix, AZ
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| Posted: Thu Oct 13, 2005 5:38 pm Post subject: |
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where are these /dev/input/event* files documented? how did you know event0 was the keyboard?
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rihteri
n00b
Joined: 01 Jun 2003
Posts: 36
Location: Seinäjoki, Finland
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| Posted: Thu Oct 13, 2005 5:59 pm Post subject: |
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| zojas wrote: | | where are these /dev/input/event* files documented? how did you know event0 was the keyboard? |
http://www.frogmouth.net/hid-doco/p13.html has something. http://www.charmed.com/txt/input-programming.txt has some more.
About making the script... I tried 'cat /dev/input/event0' etc, noticed event0 is my keyboard, event1 is mouse etc. I was actually trying to get my synaptics touchpad working, thats why I came across this thred as well.
When you open up /usr/src/linux/include/input.h you can start guessing the format of an input event - seems I got the size right eventually, at least on my system. I'm really pretty clueless about this thing, I'm not even sure about anything I said before 
EDIT:
My script counts repeats wrong. It really needs some tuning.
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mephist0
Tux's lil' helper
Joined: 19 Sep 2005
Posts: 94
Location: Germany, Frankfurt/Main
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| Posted: Sat Oct 15, 2005 7:07 pm Post subject: Re: Linux Kernel Keystroke Counter |
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| zojas wrote: | I hacked the keyboard driver in the kernel so it counts every keystroke and reports it through /proc/keystrokes.
You can go to http://www.desertsol.com/~kevin/keystroke_patch
to get a patch for 2.4.18 or 2.4.19-gentoo-r7.
Just patch, recompile, install, reboot, then
| Code: | | cat /proc/keystrokes |
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really cool, thanks alot !!
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rihteri
n00b
Joined: 01 Jun 2003
Posts: 36
Location: Seinäjoki, Finland
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| Posted: Fri Oct 21, 2005 8:49 pm Post subject: |
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I got interested in this thing, so heres a little improved version of the userspace keypress counter. Compile with 'g++ -o key key.cc'. Mostly ripped of from http://www.frogmouth.net/hid-doco/c193.html. Should work fine, ignores repeats and makes no (?) errors =)
key.cc:
| Code: | #include <fstream>
#include <linux/input.h>
#include <iostream>
using namespace std;
int main() {
struct input_event ev;
int i = 0;
//Open /dev/input/event0
ifstream fd ("/dev/input/event0", ios::binary);
if(! fd.good()) {
cout << "failed to open /dev/input/event0, you are propably not root" << endl;
exit(1);
}
while (1) {
fd.read( reinterpret_cast<char *> (&ev), sizeof(struct input_event) );
if (ev.value == 1) {
i++;
cout << i << " keys pressed." << endl;
}
}
}
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