Keylogger For FreeBSD

Marc Wiz marc at
Tue Jun 17 12:36:42 PDT 2003

On Tue, Jun 17, 2003 at 03:32:45PM -0400, Chuck Swiger wrote:
> Rohit wrote:
> >I'd like to write a keylogger for my freebsd box. Something that would log 
> >all keyboard activity on my pc. I have peeked at the keyboard files in the 
> >kernel. However, if someone could point me int the right direction... it 
> >will be greatly appreciated.
> At the shell level, something like the history command or 'script' is 
> probably more useful.  However, for a starting point maybe see 
> /usr/src/sys/dev/kbd.

In one of the older BSD (as in from UC Berkeley) releases (I think
it was 4.2) there was an ioctl that would let you spy on a tty.  I
don't remember the ioctl params or name of the ioctl parm but it
was there.

If it's not in the current source (FreeBSD source) you hopefully
should be able to find the BSD sources somewhere on the net.


Marc Wiz
marc at
Yes, that really is my last name.

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