# Copyright (c) 2012 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     "Start the cryptohome daemon"
author          "chromium-os-dev@chromium.org"

# Starts the cryptohome daemon, which handles mounting and
# unmounting users' encrypted home directories.  Also supports
# offline login checks.
start on started boot-services and started tpm_managerd and started chapsd
stop on stopping boot-services
respawn

# Set in the ebuild.
env DIRENCRYPTION_FLAG=""
env DISTRIBUTED_MODE_FLAG=""

# Directory to store ephemeral cryptohome underlying sparse file.
env CRYPTOHOME_EPHEMERAL_PATH="/run/cryptohome"

# File for passing user data auth flag from pre-start to actual script block.
env USERDATAAUTH_FLAG_STORAGE_FILE="/run/cryptohome/cryptohomed.upstart_userdataauth_flag"

# Allow VMODULE_ARG env variable to be sent to the job. If VLOG_PARAMS is set
# (unset by default), it will be set as a parameter to --vmodule.
import VMODULE_ARG
env VMODULE_ARG=

# Allow CRYPTOHOMED_ARGS env variable to be sent to the job. If CRYPTOHOMED_ARGS
# is set (unset by default), it will be passed as arguments to cryptohomed.
import CRYPTOHOMED_ARGS
env CRYPTOHOMED_ARGS=

pre-start script
  # Create dir for ephemeral mounts while running as root.
  if [ ! -d "${CRYPTOHOME_EPHEMERAL_PATH}" ]; then
    mkdir -m 0700 "${CRYPTOHOME_EPHEMERAL_PATH}"
  fi

  if /usr/libexec/cryptohome/shall-use-userdataauth.sh; then
    # Yes, we are using the new UserDataAuth interface.
    touch "${USERDATAAUTH_FLAG_STORAGE_FILE}"
  else
    rm -rf "${USERDATAAUTH_FLAG_STORAGE_FILE}"
  fi
end script

expect fork

script
  # Note that cat is not used here to prevent confusing upstart's fork
  # tracking.
  set -- "$@" --noclose ${DIRENCRYPTION_FLAG} ${DISTRIBUTED_MODE_FLAG} \
    --vmodule="${VMODULE_ARG}" ${CRYPTOHOMED_ARGS}
  [ -f "${USERDATAAUTH_FLAG_STORAGE_FILE}" ] &&
    set -- "$@" --user_data_auth_interface
  exec cryptohomed "$@"
end script

post-start exec rm -f "${USERDATAAUTH_FLAG_STORAGE_FILE}"