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

# FWUPD plugin to be used by fwupdtool update invokation.
import PLUGIN

env MINIJAIL_ARGS="--uts -e -l -p -N \
    -v -P /mnt/empty -b / -b /proc -t -r -b /dev,,1 -b /sys \
    -k run,/run,tmpfs -b /run/dbus -b /run/udev \
    -k /var,/var,tmpfs -b /var/cache/fwupd,,1 -b /var/lib/fwupd,,1 \
    -u fwupd -g fwupd"
env MINIJAIL_CAP="-c cap_dac_override+e"

pre-start script
  mkdir -p /var/cache/fwupd /var/lib/fwupd
  chown -R fwupd:fwupd /var/cache/fwupd /var/lib/fwupd
  if ! minijail0 ${MINIJAIL_ARGS} ${MINIJAIL_CAP} \
    -- /usr/bin/fwupdtool get-plugins | grep -x -F "${PLUGIN}"; then
    logger -p err -t "${UPSTART_JOB}" "Unsupported plugin: ${PLUGIN}"
    exit 1
  fi
end script

script
  # Grant cap_sys_admin for nvme plugin to issue admin ioctl commands.
  if [ "${PLUGIN}" = "nvme" ]; then
    MINIJAIL_CAP="-c cap_dac_override,cap_sys_admin+e"
  fi
  exec minijail0 ${MINIJAIL_ARGS} ${MINIJAIL_CAP} \
    -- /usr/bin/fwupdtool update --plugin-whitelist="${PLUGIN}" \
    --enable-json-state 2>&1 | logger -t "${UPSTART_JOB}"
end script