Simple virtual terminal locker.
linux/vt.h is the only platform-specific dependency. Edit config.mk to
match your setup before building (default target is /usr/local).
Run the following to compile and install (as root if necessary):
make clean install
vtlock <command ...>
The virtual terminal will stay locked until the given command exits. You can wrap X screen lockers, a kiosk program, or whatever you like.
See LICENSE.