Drop keybard events for /sbin/getty.
$ make
$ sudo make install # install to /usr/local/sbin
Modify /etc/initab.
1:2345:respawn:/sbin/getty --noclear 38400 tty1
to
# 1:2345:respawn:/sbin/getty --noclear 38400 tty1
1:2345:respawn:/usr/local/sbin/getty_wrap /sbin/getty --noclear 38400 tty1