sys-apps/fwupd/files/fwupdtool-update.conf

# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description    "Updates devices using fwupdtool"
author         "chromium-os-dev@chromium.org"

# This job is started by udev via custom events.
# Job duration is expected to be O(minutes) depending on the number of
# devices with pending updates.
start on fwupdtool-update
task

# Device GUID to be updated by fwupdtool update invocation.
import GUID
# FWUPD plugin to be used by fwupdtool update invokation.
import PLUGIN
# Are we running at boot time.
import AT_BOOT

env AT_BOOT="false"
env FILTER="usable-during-update"
env REGEX="^[0-9a-f]\{8\}-[0-9a-f]\{4\}-[0-9a-f]\{4\}-[0-9a-f]\{4\}-[0-9a-f]\{12\}$"
env MINIJAIL_ARGS="--uts -e -l -p -N \
    -v -P /mnt/empty -b / -b /proc -r -t -b /dev,,1 -k run,/run,tmpfs \
    -k /var,/var,tmpfs -b /var/cache/fwupd,,1 -b /var/lib/fwupd,,1 \
    -b /sys -u fwupd -g fwupd"
env PLUGIN_ARGS=""

pre-start script
  if [ $(expr "${GUID}" : "${REGEX}") -eq 0 ]; then
    logger -p err -t "${UPSTART_JOB}" "Invalid GUID: ${GUID}"
    exit 1
  fi
  mkdir -p /var/cache/fwupd /var/lib/fwupd /var/lib/fwupd/pending/
  chown -R fwupd:fwupd /var/cache/fwupd /var/lib/fwupd /var/lib/fwupd/pending/
  for plugin in ${PLUGIN}; do
    if ! minijail0 ${MINIJAIL_ARGS} -- /usr/bin/fwupdtool get-plugins \
      | grep -x -F "${plugin}:"; then
      logger -p err -t "${UPSTART_JOB}" "Unsupported plugin: ${plugin}"
      exit 1
    fi
  done
end script

script
  for plugin in ${PLUGIN}; do
    case "${plugin}" in
    "ccgx"|"dell_dock"|"synaptics_cxaudio"|"vli")
      MINIJAIL_ARGS="${MINIJAIL_ARGS} --add-suppl-group usb"
      ;;
    "flashrom_i2c")
      MINIJAIL_ARGS="${MINIJAIL_ARGS} --add-suppl-group i2c"
      ;;
    "nvme")
      # Grant cap_sys_admin for nvme plugin to issue admin ioctl commands.
      MINIJAIL_ARGS="${MINIJAIL_ARGS} -c cap_dac_override,cap_sys_admin+e"
      ;;
    "synaptics_mst")
      MINIJAIL_ARGS="${MINIJAIL_ARGS} --add-suppl-group drm_dp_aux"
      ;;
    "thunderbolt")
      MINIJAIL_ARGS="${MINIJAIL_ARGS} -b /sys,,1"
      ;;
    esac
    PLUGIN_ARGS="${PLUGIN_ARGS} --plugins=${plugin}"
  done

  # Apply all updates at boot time since is the safest time to do so.
  if [ "${AT_BOOT}" = "true" ]; then
    FILTER=
  fi

  minijail0 ${MINIJAIL_ARGS} -- /usr/bin/fwupdtool update "${GUID}" \
    ${PLUGIN_ARGS} --filter="${FILTER}" 2>&1 | logger -t "${UPSTART_JOB}"

  # If there is a pending update we will delay until next boot.
  if [ "${AT_BOOT}" = "false" ]; then
    if minijail0 ${MINIJAIL_ARGS} \
         -- /usr/bin/fwupdtool get-updates "${GUID}" ${PLUGIN_ARGS}; then
      echo "${PLUGIN}" > /var/lib/fwupd/pending/"${GUID}"
    fi
  fi
end script