Openconnect helper script

oc

#!/bin/bash

[ -f "${OC_CONFIG:="${HOME}/.oc-config"}" ] || { echo "Not configured - set up ${OC_CONFIG}" >&2; exit 1; }
if [ "$(id -u)" != "0" ]; then OC_CONFIG="${OC_CONFIG}" sudo "${0}" "$@"; exit $?; fi

OC_PID="/var/run/openconnect.pid"
OC_LOG="/var/log/openconnect.log"

case "${1}" in
  connect)
    [ -f "${OC_PID}" ] && { echo "Already connected - run \`${0} disconnect\`" >&2; exit 1; }
    [ -n "${2}" ] || { echo "Usage: ${0} connect <host>" >&2; exit 1; }
    sed -nE 's/^# *password=(.+)$/\1/p' "${OC_CONFIG}" | \
    openconnect --passwd-on-stdin --config="${OC_CONFIG}" \
                --script="$(brew --prefix)/etc/vpnc-script" \
                --background --pid-file="${OC_PID}" \
                "${2}" >> "${OC_LOG}" 2>&1 || {
      echo "Error connecting - see ${OC_LOG} for details"; exit 1
    }
    echo "Connected"
    exit 0
    ;;
  disconnect)
    [ -f "${OC_PID}" ] || { echo "Not connected - run \`${0} connect <host>\`" >&2; exit 1; }
    _PID="$(cat "${OC_PID}")"
    kill "${_PID}"
    while ps ax | grep -q "^ *${_PID} "; do sleep 1; done
    rm -f "${OC_PID}"
    echo "Disconnected"
    exit 0
    ;;
  *) echo "Usage: ${0} <connect <host> | disconnect>" >&2; exit 1 ;;
esac