Easy way to reconnect to a running ssh-agent session (better than opening a new one!)

ssh-reagent.sh

# source: http://tychoish.com/rhizome/9-awesome-ssh-tricks/
  ssh-reagent () {
          for agent in /tmp/ssh-*/agent.*; do
                 export SSH_AUTH_SOCK=$agent
                 if ssh-add -l 2>&1 > /dev/null; then
                         echo Found working SSH Agent:
                         ssh-add -l
                         return
                 fi
         done
         echo Cannot find ssh agent - maybe you should reconnect and forward it?
  }