#!/bin/sh
# Starts a command running in screen, with a given session name, and detaches
# it immediately. The screen session can then be connected to by the various
# test scripts as a console.
set -e

session=digress-$MACHINE-$SCHEME

# Check to see if this session is already running
screen -wipe >/dev/null 2>&1 || true
existing=$(screen -ls $session | grep "$session	(") || true
if [ -n "$existing" ]; then
	if echo $existing | grep -q "Attached"; then
		echo "Existing attached screen session: $existing"
		exit 1
	else
		echo "Killing existing screen session: $existing"
		pid=$(echo $existing | cut -d . -f 1)
		kill $pid
		sleep 30
		existing=$(screen -ls $session | grep "$session (") || true
		if [ -n "$existing" ]; then
			echo "Failed to kill existing session. Aborting."
			exit 1
		fi
	fi
fi

cd $STATE_DIR/
rc=$MACHINE-$SCHEME.screenrc
log=$MACHINE-$SCHEME.screenlog
cat > $rc <<EOF
startup_message off
shell $SCREEN_COMMAND
sessionname $session
logfile $log
EOF

# Note: screen requires the rc file exist until all attaches are done.

screen -L -d -m -c $rc

# Give the program a while to settle down.
sleep 5