lsbt

#!/bin/sh
#
# List Bluetooth devices by status and type in MacOS on the command line
# requires /usr/local/bin/xmlstarlet (http://xmlstar.sourceforge.net/)
# Usage:
# lsbt [ -c | --connected ] [ -a | --audio ] [ -n | --numeric ] [ <device name> | <device mac address> ]
#
# Device name filtering ignores special characters and case
#
# * List names of all paired devices
#   lsbt
#
# * List names of all connected devices
#   lsbt -c
#
# * List names of all connected audio devices
#   lsbt -c -a
#
# * List names of all known audio devices
#   lsbt --audio
#
# * List mac addresses of all connected devices
#   lsbt --connected --numeric
#
# * List single device
#   lsbt "ODT Privates"
#   lsbt 78:4F:43:75:C1:28
#

set -o errexit
set -o nounset
set -o pipefail

if ! which -s xmlstarlet
then
  echo "Missing required utility: xmlstarlet" >&2
  /bin/echo -n "Install (will run: brew install xmlstarlet)? (y/N)" >&2
  read ans
    echo
  if [ "$ans" == "y" ]
  then
    brew install xmlstarlet
  else
    echo "Aborting.">&2
    exit 8
  fi
fi

connected_only=""
audio_only=""
numeric_output=""
device=""

while [ "${1:-}" ]
do
  if [ "$1" = "-c" -o "$1" = "--connected" ]
  then
    connected_only="1"
  elif [ "$1" = "-a" -o "$1" = "--audio" ]
  then
    audio_only="1"
  elif [ "$1" = "-n" -o "$1" = "--numeric" ]
  then
    numeric_output="1"
  else
    device="$1"
  fi
  shift
done

if [ "$connected_only" ]
then
  connected_criterion='[dict/key[text() = "device_isconnected"]/following-sibling::string[1]/text() = "attrib_Yes"]'
else
  connected_criterion=''
fi

if [ "$audio_only" ]
then
  audio_criterion='[contains(dict/key[text() = "device_services"]/following-sibling::string[1]/text(), "Audio")]'
else
  audio_criterion=''
fi



if [ "$numeric_output" ]
then
  final_xpath_component='dict/key[text() = "device_addr"]/following-sibling::string[1]'
  output_filter1="tr - :"
else
  final_xpath_component="key"
  output_filter1="cat"
fi


if [ "$device" ]
then
  device="$(echo $device  |sed 's/[^0-9a-zA-Z ]/./g')"
  output_filter2="grep -xi \"$device\""
else
  output_filter2="cat"
fi

# strip out network reference to avoid xmlstarlet stderr noise
#
# Redirect system_profilter stderr for this message: 2018-04-07 15:42:05.926 system_profiler[70736:84221333] Exception NSInvalidArgumentException thrown while decoding IOBluetoothSDPServiceRecord
system_profiler -xml SPBluetoothDataType 2>/dev/null| grep -v DOCTYPE | /usr/local/bin/xmlstarlet sel --text --template --match '/plist/array/dict/key[text() = "_items"]/following-sibling::array[1]/dict/key[text() = "device_title"]/following-sibling::array[1]/dict'"${connected_criterion}${audio_criterion}/${final_xpath_component}" --value-of . --nl | $output_filter1 | eval "$output_filter2"