Re-use ssh agent cross logins.

agent.sh

# To use this, source from your proFile.

MYAGENTS=(`pgrep -U $USER -f ^ssh-agent$|sort -n`)

echo "Found ${#MYAGENTS[@]} ssh-agents."

# Let's try to take over the agents, like we do everynight Pinky!
if [[ "${MYAGENTS[@]}" ]];then
  KEEPER=${MYAGENTS[0]}
  echo KEEPER: $KEEPER
  OUTCAST=${MYAGENTS[@]:1}
  [[ "$OUTCAST" ]] && { echo "Goodbye agent $OUTCAST"; kill $OUTCAST; }
  SSH_AUTH_SOCK=`awk '/tmp\/ssh/ {print $NF}' /proc/$KEEPER/net/unix`
  export SSH_AUTH_SOCK;
  SSH_AGENT_PID=$KEEPER; export SSH_AGENT_PID;
else
  NEWAGENT="`ssh-agent`"
  echo $NEWAGENT;
  eval $NEWAGENT
fi

ssh-add -l | grep "The agent has no identities" && ssh-add