Force people to play Qchess

qchess_login.sh

+#!/bin/bash
+
+# Qchess login script
+# Only works with GDM
+# WARNING: Don't use on systems without GDM, because it will probably break everything
+# Add to root's crontab to run every minute
+
+# Check qchess isn't already running
+if [ "$(ps aux | grep -v grep | grep "qchess\.py" | wc -l)" != "0" ]; then
+	echo "qchess already running" 1>&2
+	(ps aux | grep -v grep | grep qchess) 1>&2
+	exit 0
+fi
+
+# Check that only GDM is running gnome-session
+# This should indicate that the login selection is being shown
+session_types="gnome-session\|kdeinit"
+non_gdm_sessions=$(ps aux | grep -v grep | grep "$session_types" | awk '{print $1}' | grep -v gdm | wc -l)
+
+if [ "$non_gdm_sessions" != 0 ]; then
+	echo "$non_gdm_sessions non gdm sessions running" 1>&2
+	exit 0
+fi
+
+# OK, go ahead and do evil stuff
+
+export DISPLAY=:1
+p=$(pwd)
+cd /home/wheel/matches/progcomp2013/qchess
+win="black"
+
+#espeak "I challenge you to a duel!"
+while [ "$win" == "black" ]; do
+	win=$(./qchess.py @human @internal:AgentBishop)
+done
+
+#if [ "$win" == "white" ]; then
+#	espeak "I'll beat you next time."
+#else
+#	espeak "You dirty, cheating, human."
+#fi
+cd $p