automatically start tmux in interactive ssh sessions (to be used in .bashrc)

ssh-tmux

case $- in
*i*)    # interactive shell

	if [ -z "$TMUX" ]; then
		if [ "$SSH_CLIENT" ]; then
			TMUX_SESSION=`echo ${SSH_CLIENT} | cut -f1 -d" "`
			echo "checking for tmux session with ID $TMUX_SESSION"
			if tmux has-session -t "$TMUX_SESSION" > /dev/null; then
				exec tmux at -t "$TMUX_SESSION"
			else
				exec tmux new-session -s "$TMUX_SESSION"
			fi
		fi	
	fi
;;
*)      # non-interactive shell
;;
esac