#could be placed in .profile c.f man page
gpg-agent --daemon --enable-ssh-support \
        --write-env-file "${HOME}/.gpg-agent-info"

if [ -f "${HOME}/.gpg-agent-info" ]; then
    . "${HOME}/.gpg-agent-info"
    export GPG_AGENT_INFO
    export SSH_AUTH_SOCK
    export SSH_AGENT_PID
fi