# Copyright (c) 2011 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.

# cros-disks upstart job

env CROS_DISKS_UID=213
env CROS_DISKS_GID=213

# Set the default polling interval in milliseconds on block devices.
# This in-kernel polling mechanism is available since kernel 2.6.38.
# The poll timer slack is set to 25% in kernel (linux/block/genhd.c).
# With a polling interval <= 1 second, the system seems to react to
# eject requests from a CD-ROM drive more responsively.
env BLOCK_DEFAULT_POLL_MSECS=1000
env BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH=/sys/module/block/parameters/events_dfl_poll_msecs

# Minimum log level defined in base/logging.h.
#   0:INFO, 1:WARNING, 2:ERROR, 3:ERROR_REPORT, 4:FATAL
#   -1:VLOG(1), -2:VLOG(2), etc
# Set to log only INFO or above by default.
env CROS_DISKS_LOG_LEVEL=1

start on starting system-services
stop on stopping system-services

pre-start script
  # Set default polling interval on block devices.
  # This only affects block devices with removable media, which do not
  # support asynchronous media change/eject events.
  if [ -f "${BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH}" ]; then
    echo "${BLOCK_DEFAULT_POLL_MSECS}" > "${BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH}"
  fi

  # Load the FUSE module, which is a dependency for AVFS.
  # cros-disks should still run even the FUSE module is failed to load.
  logger -t "$UPSTART_JOB" "Loading FUSE module"
  modprobe fuse || logger -t "$UPSTART_JOB" "Failed to load FUSE module"
end script

post-stop script
  if [ -f "${BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH}" ]; then
    # Disable default polling on block devices.
    echo 0 > "${BLOCK_DEFAULT_POLL_MSECS_SYSFS_PATH}"
  fi
end script

respawn
expect fork

exec /opt/google/cros-disks/disks --log-level="${CROS_DISKS_LOG_LEVEL}"