arc/vm/sensor_service/init/arc-sensor-service.conf

# Copyright 2020 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   "ARC sensor service"
author        "chromium-os-dev@chromium.org"

start on starting arcvm-pre-login-services
stop on stopping arcvm-pre-login-services

limit as 100000000 unlimited
oom score -100

pre-start script
  {
    echo "Pre-start ${UPSTART_JOB}"
    set -x

    # This code was imported from arc/setup/etc/arc-sensor.conf.
    ring_buffer_dir="$(find /sys/devices -path '*cros-ec-ring*' -name buffer)"
    ring_dir=$(dirname "${ring_buffer_dir}")
    if [ -d "${ring_buffer_dir}" ]; then
      # Enable all channels for ARC++, be sure the buffer is not.
      echo 0 > "${ring_buffer_dir}/enable"
      for channel in ${ring_dir}/scan_elements/*_en; do
         echo 1 > "${channel}"
      done
    fi
  } 2>&1 | logger -t "${UPSTART_JOB}"
end script

script
  logger -t "${UPSTART_JOB}" "Start ${UPSTART_JOB}"
  set -x

  # List all IIO device files.
  for DEVICE in /dev/iio:device*; do
    IIO_DEVICE_BIND_ARGS="${IIO_DEVICE_BIND_ARGS} -b ${DEVICE}"
  done

  # List all directories referenced by IIO sysfs symlinks.
  for DEVICE in /sys/bus/iio/devices/*; do
    if [ -L "${DEVICE}" ]; then
      LINKED="$(readlink -f ${DEVICE})"
      IIO_DEVICE_BIND_ARGS="${IIO_DEVICE_BIND_ARGS} -b ${LINKED},${LINKED},1"
    fi
  done

  exec minijail0 \
    --profile=minimalistic-mountns \
    -e \
    -p \
    -l \
    --uts \
    -N \
    -k 'tmpfs,/sys,tmpfs,MS_NOSUID|MS_NODEV|MS_NOEXEC' \
    -b /sys/bus/iio/devices \
    -k 'tmpfs,/run,tmpfs,MS_NOSUID|MS_NODEV|MS_NOEXEC' \
    -b /run/dbus \
    ${IIO_DEVICE_BIND_ARGS} \
    -- /usr/bin/arc_sensor_service
end script

post-stop exec logger -t "${UPSTART_JOB}" "Post-stop ${UPSTART_JOB}"