ssh-agent handler for bashrc/profile

gistfile1.txt

# ~/.profile, ~/.bashrc, (or ~/.bash_profile in cygwin and others)
##########
## joe miller, ssh-agent handling stuff
##
SSH_ENV="$HOME/.ssh/environment"

SSH_KEY_PRIVATE="$HOME/.ssh/id_rsa"
SSH_KEY_PUB="$HOME/.ssh/id_rsa.pub"

function start-agent {
        SSH_ENV=${SSH_ENV:-"$HOME/.ssh/environment"}

        if [ -f "${SSH_ENV}" ]; then
                . "${SSH_ENV}" > /dev/null
                #ps ${SSH_AGENT_PID} doesnt work under cywgin
                ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
                        _start_agent;
                }
        else
                _start_agent;
        fi
}

function _start_agent {
        SSH_ENV=${SSH_ENV:-"$HOME/.ssh/environment"}

        echo "Initialising new SSH agent..."
        /usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}"
        echo succeeded
        chmod 600 "${SSH_ENV}"
        . "${SSH_ENV}" > /dev/null
        ssh-add ${SSH_KEY_PRIVATE}
}

function stop-agent {
        SSH_ENV=${SSH_ENV:-"$HOME/.ssh/environment"}

        echo "Killing SSH-agent..."
        chmod 600 "${SSH_ENV}"
        . "${SSH_ENV}" > /dev/null
        eval `ssh-agent -k`
}

function put-ssh-key {
        SSH_ENV=${SSH_ENV:-"$HOME/.ssh/environment"}

        _host=$1
        _user=${2:-${USER}}
        _port=${3:-22}

        if [ -z ${_host} ] || [ -z ${_user} ] || [ -z ${_port} ]; then
                echo "Usage: put-ssh-key hostname [username] [port]"
                echo
                echo "username and port are optional, but if you include"
                echo "one you must include both"
                return 1
        fi

        pub_key_data=`cat ${SSH_KEY_PUB}`

        ssh -p ${_port} ${_user}@${_host}       "mkdir -p ~${_user}/.ssh ; \
                        touch ~${_user}/.ssh/authorized_keys ; \
                        chmod 0700 ~${_user}/.ssh ; \
                        chmod 0600 ~${_user}/.ssh/authorized_keys ; \
                        echo "${pub_key_data}" >>~${_user}/.ssh/authorized_keys ; "
}

# ensure an agent is available whenever ssh or scp is run
alias ssh='start-agent ; ssh'
alias scp='start-agent ; scp'

# remove the line below if you want to delay the startup
# of ssh-agent until the first time you use ssh
start-agent

#################