bash startup script for cygwin, charade, pageant

ssh-agent.sh

#!/bin/bash

# NOTE: this is no longer necessary, the current version of charade works well with
# keychain, and the instructions on installing and using charade explain how to use
# them together by adding the following to your .bash_profile:
#       eval `keychain -Q --eval`

# cygwin bash profile startup script, based off a post found here:
# http://russelldavis.blogspot.com/2011/02/using-charade-to-proxy-cygwin-ssh-agent.html 
# Uses charade: https://github.com/wesleyd/charade

echo -n "ssh-agent..."
if [[ -n "$SSH_AUTH_SOCK" ]]; then
    ssh-add -l 2>/dev/null | grep : > /dev/null
    if [ $? = 0 ]
    then
        GOT_AGENT=1
    else
        GOT_AGENT=0
    fi
fi
if ((GOT_AGENT==0)); then
    for FILE in $(find /tmp/ssh-???* -type s -user ${USERNAME} -name "agent.[0-9]*" 2> /dev/null)
    do
        SSH_AUTH_SOCK=${FILE}
        SOCK_PID=$(ls ${FILE%/agent.*}/stdout.[0-9]*)
        SOCK_PID=${SOCK_PID##*.}

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


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

        ssh-add -l 2>/dev/null | grep : > /dev/null
        if [ $? = 0 ]
        then
            GOT_AGENT=1
            break
        fi
        rm -rf ${FILE%/agent.*}
    done
fi

if [[ $GOT_AGENT != 1 ]]
then
    eval `~/bin/charade -s`
fi
unset GOT_AGENT SOCK_PID
echo -e "\t\t$SSH_AGENT_PID"