ssh-agent-settings

sshrc.sh

function start_agent {
# Initialize new agent and add authentication
  echo "Initialising new SSH agent..."

  # Start authenticating daemon
  # No authentications set up yet, just starting daemon!
  ssh-agent | head -2 > ${SSH_ENV}
  chmod 600 ${SSH_ENV}

  # Find SSH_AUTH_SOCK and SSH_AGENT_PID of the available daemon
  source ${SSH_ENV} > /dev/null

  # Add authentication to this and only this daemon
  ssh-add
}

function ssh-login {
  if [[ -f "${SSH_ENV}" ]]; then
    # Find SSH_AUTH_SOCK and SSH_AGENT_PID of the available daemon
    source ${SSH_ENV} > /dev/null

    # Check if the agent is still running
    local ierr=0
    ps ${SSH_AGENT_PID} > /dev/null || ierr=1

    if [ ${ierr} == "0" ]; then
      echo > /dev/null
    else
      # If not initialize new agent and
      # add authentication
      start_agent;
    fi
  else
    start_agent;
  fi
}

case ${PLATFORM} in
  darwin)
    # Setup ssh stuff.
    if [[ -z ${SSH_AUTH_SOCK} ]]; then
      ssh-add -K
    else
      echo "SSH agent using key in OSX keychain."
    fi
    ;;
  *)
    # Setup ssh agent.
    if [[ -z ${SSH_AUTH_SOCK} ]] && [[ -e "${SSH_AUTH_SOCK}" ]]  ; then
      export SSH_ENV=${HOME}/.ssh/env-${HOSTNAME}
      export SSH_CONFIG=${HOME}/.ssh/config
      ssh-login
    else
      echo "SSH agent already active from another session or host."
    fi
    ;;
esac