VPN connection script

vpn

#!/usr/bin/env bash

set -euo pipefail

usage="$0: <up|down> [connection name]"
action="${1?$usage}"
connection="${2:-GDS VPN Developer}"

oath_key=vpn
pass_key=gds/vpn

case "$action" in
  up)
    otp=$(ykman oath code "$oath_key" | awk '/[0-9]$/ { print $NF; }')
    : "${otp:?OTP not found}"

    password=$(pass "$pass_key")

    # Shut down the GUI app, which doesn't get along with the CLI tool
    pkill "Cisco AnyConnect Secure Mobility Client" || :

    echo -e "${USER}\n${password}\n${otp}" | \
      /opt/cisco/anyconnect/bin/vpn -s connect "$connection" | \
      grep --line-buffered -Fv 'Second Password'
    ;;
  down)
    /opt/cisco/anyconnect/bin/vpn -s disconnect
    ;;
  *)
    echo "$usage" >&2
    exit 1
    ;;
esac