Dev ubuntu20.04

Integrate changes needed for the Ubuntu20.04-based ISO.

tools/btbind

+#!/bin/bash
+
+# script to ease connecting to an EV3 brick
+# (c) 2018      Johannes Sauer
+# (c) 2007-2009 Johannes Ballé
+
+# test if syntax is correct; if not, print help and exit
+
+if [ $# = 0 -o $# -gt 2 ] || [ "$1" = "--help" -o "$1" = "-h" ] || ! { [ $# = 1 ] || [ "$2" -ge 0 ] 2>/dev/null; }; then
+	cat <<-END_HELP >&2
+		${0##*/} <device name> [rfcomm device number] 
+
+		${0##*/} establishes a persistent connection to the device name given 
+		in the first argument. The second, optional argument
+		specifies which rfcomm device should be used. If omitted, the first
+		available device will be used.
+
+		The device needs to be paired already. Use the Bluetooth setting GUI to do this.		
+
+		The device will be bound to the device number. Connection is established, once
+		it is used. 
+		Examples:
+
+		${0##*/} EV3-20-B 2 
+
+		This connects the EV3 brick named "EV3-20-B" to rfcomm2.
+
+		${0##*/} 00:16:53:06:D8:67
+
+		This connects the EV3 brick with the hardware address 00:16:53:06:D8:67
+		to the first available rfcomm device (if no others are used, this will
+		be rfcomm0).
+
+		Depending on your Linux distribution, you will find the rfcomm device file
+		either at /dev/rfcommX or /dev/bluetooth/rfcommX.
+	END_HELP
+	exit 128
+fi
+
+# if device name is given, check if it's already used
+
+if [ $# = 2 ]; then
+	(( DEVICE=$2 ))
+	if [ -e /dev/rfcomm$DEVICE -o -e /dev/bluetooth/rfcomm$DEVICE ]; then
+		echo "rfcomm$DEVICE is already in use!"
+		exit 3
+	fi
+fi
+
+
+
+
+# get mac from device name
+NAME="$1"
+MAC=$(echo -e 'devices \n' | bluetoothctl | awk -F ' ' '$2 ~ /^([0-9a-fA-F]+:)+[0-9a-fA-F]+$/ && $3 == "'"$NAME"'" { print $2 }')
+#MAC=$( hcitool scan | awk -F '\t' '$2 ~ /^([0-9a-fA-F]+:)+[0-9a-fA-F]+$/ && $3 == "'"$NAME"'" { print $2 }' )
+
+if [ -z $MAC ]; then
+    echo "not found. You have to pair the device first! Use the bluetooth setting GUI." >&2
+    exit 1
+fi
+if [[ $MAC == *\ * ]]; then
+    echo "found multiple devices:" >&2
+    echo >&2
+    for i in $MAC; do
+	echo '	'$i >&2
+    done
+    echo >&2
+    echo "Not supported by ${0##*/}. Make sure the devices have different names." >&2
+    exit 2
+fi
+echo "found paired device $MAC." >&2
+
+# if hardware address is given, we're all set. otherwise, perform a scan
+
+# if [[ $1 =~ ^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$ ]]; then
+# 	MAC=$1
+# else
+# 	NAME="$1"
+# 	echo -n "Scanning for '$NAME' ... " >&2
+# 	MAC=$( hcitool scan | awk -F '\t' '$2 ~ /^([0-9a-fA-F]+:)+[0-9a-fA-F]+$/ && $3 == "'"$NAME"'" { print $2 }' )
+# 	if [ -z $MAC ]; then
+# 		echo "not found." >&2
+# 		exit 1
+# 	fi
+# 	if [[ $MAC == *\ * ]]; then
+# 		echo "found multiple devices:" >&2
+# 		echo >&2
+# 		for i in $MAC; do
+# 			echo '	'$i >&2
+# 		done
+# 		echo >&2
+# 		echo "Use ${0##*/} with one of the addresses above." >&2
+# 		exit 2
+# 	fi
+# 	echo "found $MAC." >&2
+# fi
+
+# if device is not given, find first unused device
+
+if [ -z $DEVICE ]; then
+	(( DEVICE=0 ))
+	while [ -e /dev/rfcomm$DEVICE -o -e /dev/bluetooth/rfcomm$DEVICE ]; do
+		(( DEVICE++ ))
+	done
+fi
+
+echo "Binding rfcomm${DEVICE} to bluetooth device with address '${MAC}'  ..."
+rfcomm bind rfcomm$DEVICE $MAC &
+