agentify.sh

#!/bin/bash

# from http://snippets.dzone.com/posts/show/10897
# source this file from bashrc

GOT_AGENT=0
for FILE in $(find /tmp/ssh-???*[0-9]* -type s -user ${LOGNAME} -name "agent.[0-9]*")
do
    SOCK_PID=${FILE##*.}

    PID=$(ps -fu${LOGNAME}|awk '/ssh-agent/ && ( $2=='${SOCK_PID}' || $3=='${SOCK_PID}' || $2=='${SOCK_PID}' +1 ) {print $2}')

    SOCK_FILE=${FILE}

    SSH_AUTH_SOCK=${SOCK_FILE}; export SSH_AUTH_SOCK;
    SSH_AGENT_PID=${PID}; export SSH_AGENT_PID;

    ssh-add -l | grep : > /dev/null
    if [ $? = 0 ]
    then
        GOT_AGENT=1
        echo "Agent pid ${PID}"
        break
    fi
    echo "Skipping pid ${PID}"

done

if [ $GOT_AGENT = 0 ]
then
    ssh-add
fi