console-test

#!/bin/bash

# Get the script directory
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

# Default values
CHALLENGE="The sun is shining..."
RESPONSE_HASH="cf0dee735ed650d6baca9b6a4e3fb087"

function tty_command()
{
	# Run this command if the session is from a physical TTY
	$DIR/response-test -c "$CHALLENGE" -m "$RESPONSE_HASH" -s "exit 0" -f "$DIR/lolsh $PPID"
}

# systemd implements an $INVOCATION_ID for processes it spawns (including console TTYs)
# so this should evaluate to true (mostly probably?) only for console TTYs and will run
# if a virtual terminal is started from within a TTY
if [[ -n "$INVOCATION_ID" && -n "$SHELL" ]]; then
	tty_command
	exit 0
fi

# I don't know if it would ever be possible to login through a
# physical console and not have $SHELL or $INVOCATION_ID set?
# But I'm paranoid. And environment variables aren't always reliable.
# So we also test the tty device.
case $(tty) in /dev/tty[0-9]*)
	tty_command ;;
esac