udev-addon.conf

# 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.

description     "Trigger udev events"
author          "chromium-os-dev@chromium.org"

# We must run eventually even if the UI doesn't come up correctly,
# because network configuration depends on this job.
start on starting failsafe

script
  udevadm trigger
  udevadm settle

  drvfile=/var/lib/preload-wifi-driver

  # Create/Update driver name for the built-in WIFI.
  # Used to preload WIFI driver in udev.conf
  # TODO(ggg): can flimflam share the "user selected" network device?
  iwdev=$(iw dev | awk '/Interface/ { print $2 ; exit 0 }')

  if [ -n "$iwdev" ] ; then
    drv=$(ethtool -i "$iwdev" | awk '/driver:/ { print $2 }')
  fi

  if [ -n "$drv" ] ; then
    drvmod=$(lsmod | awk 'd==$1 { print $1 }' d="$drv")
  fi

  if [ -n "$drvmod" ] ; then
    if [ -s $drvfile ] ; then
      olddrv=$(head -1 $drvfile)
    fi

    # Blacklist brcm drivers
    # TODO: investigate true cause of the problem and remove blacklist
    if [ "$(echo $drv | head -c4)" = "brcm" ] ; then
      rm -f $drvfile
    # Only update contents if they've changed.
    elif [ "$drv" != "$olddrv" ] ; then
      echo "$drv" > $drvfile
    fi
  else
    logger "udev-addon:$iwdev: $drv is not a module."
  fi
end script