#!/bin/sh
set -eu

# Re-exec outside of apparmor confinement
if [ -d /sys/kernel/security/apparmor ]; then
  label="$(cat /proc/self/attr/current 2>/dev/null)"
  if [ "$label" != "unconfined" ] && [ -n "${label##*(unconfined)}" ]; then
    exec aa-exec -p unconfined -- "$0" "$@"
  fi
fi

# Utility functions
get_bool() {
    value=$(echo "${1:-}" | tr '[:upper:]' '[:lower:]')

    # See if it's true
    for yes in "true" "1" "yes" "on"; do
        if [ "${value}" = "${yes}" ]; then
            echo "true"
            return
        fi
    done

    # See if it's false
    for no in "false" "0" "no" "off"; do
        if [ "${value}" = "${no}" ]; then
            echo "false"
            return
        fi
    done

    # Invalid value (or not set)
    return
}

# Only create symlinks if /etc has been generated by daemon.start.
if [ -e "/etc/.lxd_generated" ]; then
  openvswitch_builtin=$(get_bool "$(snapctl get openvswitch.builtin)")
  if [ "${openvswitch_builtin:-"false"}" = "true" ]; then
      echo "=> Starting Open vSwitch"
      export OVS_RUNDIR="${SNAP_COMMON}/openvswitch/run/"
      (
          set -e
          export OVS_LOGDIR="${SNAP_COMMON}/openvswitch/logs/"
          export OVS_DBDIR="${SNAP_COMMON}/openvswitch/db/"
          export OVS_SYSCONFDIR="${SNAP_COMMON}/openvswitch/conf/"
          export OVS_PKGDATADIR="${SNAP}/share/openvswitch/"
          export OVS_BINDIR="${SNAP}/bin/"
          export OVS_SBINDIR="${SNAP}/bin/"

          mkdir -p "${OVS_SYSCONFDIR}/openvswitch"
          (
              # Close socket activation fd
              exec 3<&- || true

             "${SNAP}/share/openvswitch/scripts/ovs-ctl" start --system-id=random
          )
      )
  else
      ln -snf /var/lib/snapd/hostfs/run/openvswitch /run/openvswitch
  fi
fi