Use the HWID from the firmware as the hardware class, if available.

# qualification ID) of this device, or "unknown" if it can't determine

# the hardware class.

# TODO(petkov): The hardware qualification ID is not available on

# systems yet, so the script uses alternative ways to identify

# different system classes (e.g., the WiFi adapter PCI vendor and

# device IDs). Switch the script to use real hardware qualification ID

# when that becomes available.

# TODO(petkov): If the hardware qualification ID is not available on

# the systems, the script uses alternative ways to identify different

# system classes (e.g., the WiFi adapter PCI vendor and device

# IDs). Switch the script to use only real hardware qualification ID

# when that becomes available on all systems.

HARDWARE_CLASS=

readonly HWID_PATH=/sys/bus/platform/devices/chromeos_acpi/HWID

# Appends a new component ID to the hardware class. Separates IDs with

# dashes.

append_class() {

  [ -n "$1" ] || return

  [ -n "$HARDWARE_CLASS" ] && HARDWARE_CLASS="${HARDWARE_CLASS}-"

  HARDWARE_CLASS="${HARDWARE_CLASS}$1"

}

hwid() {

  [ -r  "$HWID_PATH" ] || return

  local acpihwid

  acpihwid=$(cat "$HWID_PATH")

  [ -n "$acpihwid" ] || return

  append_class "$acpihwid"

}

# Adds the CPU family, model and stepping info, if available, to the

# class.

cpu() {

  [ -r /proc/cpuinfo ] || return

  FAMILY=`grep -m1 '^cpu family' /proc/cpuinfo \

            | sed 's/cpu family\s\+:\s\+\([0-9]\+\)$/\1/'`

  MODEL=`grep -m1 '^model' /proc/cpuinfo \

           | sed 's/model\s\+:\s\+\([0-9]\+\)$/\1/'`

  STEPPING=`grep -m1 '^stepping' /proc/cpuinfo \

              | sed 's/stepping\s\+:\s\+\([0-9]\+\)$/\1/'`

  if [ -n "$FAMILY" ] && [ -n "$MODEL" ] && [ -n "$STEPPING" ]; then

    append_class "cpu/$FAMILY:$MODEL:$STEPPING"

  local family

  family=$(grep -m1 '^cpu family' /proc/cpuinfo \

    | sed 's/cpu family\s\+:\s\+\([0-9]\+\)$/\1/')

  local model

  model=$(grep -m1 '^model' /proc/cpuinfo \

    | sed 's/model\s\+:\s\+\([0-9]\+\)$/\1/')

  local stepping

  stepping=$(grep -m1 '^stepping' /proc/cpuinfo \

    | sed 's/stepping\s\+:\s\+\([0-9]\+\)$/\1/')

  if [ -n "$family" ] && [ -n "$model" ] && [ -n "$stepping" ]; then

    append_class "cpu/$family:$model:$stepping"

  fi

}

# Adds the wlan0 PCI vendor and device ID, if available, to the class.

wlan() {

  WLAN_DEV=/sys/class/net/wlan0/device

  if [ -r $WLAN_DEV/vendor ] && [ -r $WLAN_DEV/device ]; then

    WLAN_ID=`paste -d ':' $WLAN_DEV/vendor $WLAN_DEV/device | sed s/0x//g`

    append_class "wlan0/$WLAN_ID"

  local dev=/sys/class/net/wlan0/device

  if [ -r $dev/vendor ] && [ -r $dev/device ]; then

    local id

    id=$(paste -d ':' $dev/vendor $dev/device | sed s/0x//g)

    append_class "wlan0/$id"

  fi

}

HARDWARE_CLASS=

main() {

  hwid

  # If the HWID is not available, use system component IDs.

  if [ -z "$HARDWARE_CLASS" ]; then

    cpu

    wlan

    [ -z "$HARDWARE_CLASS" ] && HARDWARE_CLASS=unknown

  fi

  echo $HARDWARE_CLASS

}

main $@