bthandler/bt
2020-06-09 18:33:27 +02:00

110 lines
4.3 KiB
Bash
Executable File

#!/bin/bash
#wait time to discover new devices in seconds
SCAN_PERIOD=5
#locations of blacklist and hard coded list of paired devices (watch out, need to modify Makefile as well if you want to change these values and still use make install)
BLACKLIST=${XDG_DATA_HOME:-$HOME/.local/share}/bt/blacklist
PAIRLIST=${XDG_DATA_HOME:-$HOME/.local/share}/bt/paired
actions="turn off
turn on
pair
unpair"
#Checks for necessary programs to be present. Very unlikely not to be present but let's just err on the safer side.
for prog in dmenu bluetoothctl awk cat date nl; do
if ! hash "$prog" 2>/dev/null; then
printf 'bthandler: %s: command not found\n' "$prog" >&2
exit 127
fi
done
#start scanning as early as possible to speed up pairing process:
bluetoothctl power on & bluetoothctl scan on &>/dev/null &
start_scan="$( date +'%s' )"
#Compile list of all Bluetooth IDS of paired devices (from bluetoothctl and from hardcoded list)
bt_IDS="$( ( bluetoothctl paired-devices && cat "$PAIRLIST" ) | sort -u | awk '{print $2}' )"
#Compile list of all device Names of paired devices (from bluetoothctl and from hardcoded list)
paired_devices="$( ( bluetoothctl paired-devices && cat "$PAIRLIST" ) | sort -u | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}' )"
disp_devices="$( echo "$paired_devices" | grep -vf "$BLACKLIST" )"
#Don't print empty device list, removes unnecessary empty choice in dmenu
[ "$disp_devices" = "" ] && choice=$( echo "$actions" | dmenu -i -p 'What BT action would you like to perform:' )
[ "$disp_devices" != "" ] && choice=$( echo "$disp_devices" "$actions" | dmenu -i -p 'What BT action would you like to perform:' )
cleanup(){
bluetoothctl scan off
exit 0
}
pair(){
#since this function can get called indefinitely, make sure to always be scanning and controller has power in the case that it got deactived by some other process.
bluetoothctl power on &>/dev/null &
bluetoothctl scan on &>/dev/null &
#check whether $SCAN_PERIOD seconds has already passed since starting scanning, if not, wait for the rest of that time.
if [ $((( "$(date +'%s')" - "$start_scan" ))) -lt $SCAN_PERIOD ]; then
sleep_period="$((( "$SCAN_PERIOD" - "$( date +'%s')" + "$start_scan" )))"
if [ "$sleep_period" -eq 1 ]; then
notify-send "Bluetooth" "Searching for devices, please wait 1 second"
else
notify-send "Bluetooth" "Searching for devices, please wait $sleep_period seconds"
fi
sleep "$sleep_period"
fi
echo "$paired_devices" > /tmp/paired_devices
new_devices="$( bluetoothctl devices | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}' | grep -vf /tmp/paired_devices )"
rm -f /tmp/paired_devices
choice=$( (echo "$new_devices" && echo 'rescan' ) | dmenu -l 10 -i -p 'pair with which device?' )
if [ -n "$choice" ]; then
if [ "$choice" = "rescan" ]; then
start_scan="$( date +'%s')"
pair
fi
bt_IDS="$( bluetoothctl devices | awk '{print $2}' )"
dev_no=$( echo "$new_devices" | nl | grep "$choice" | awk '{print $1}')
dev_id=$( echo "$bt_IDS" | nl | grep -P "^.*$dev_no\t" | awk '{print $2}' )
bluetoothctl pair "$dev_id" && sleep 2
bluetoothctl connect "$dev_id"
#if device is not already hard coded as paired, add to paired devices list
if grep -q "$dev_id" "$PAIRLIST"
then
echo Device "$dev_id" "$choice" >> "$PAIRLIST"
fi
fi
cleanup
}
case $choice in
"turn on") bluetoothctl power on
cleanup;;
"turn off") bluetoothctl power off
cleanup;;
"scan on") bluetoothctl power on && echo power on && sleep 2
([ -n "$TERMINAL" ] && $TERMINAL -e bluetoothctl scan on ) || st bluetoothctl scan on
cleanup;;
"pair") pair;;
"unpair") choice=$( echo "$paired_devices" | dmenu -l 10 -i -p 'remove which paired device?')
if [ -n "$choice" ]; then
dev_no=$( echo "$paired_devices" | nl | grep -P "[0-9]+\t$choice$" | awk '{print $1}')
dev_id=$( echo "$bt_IDS" | nl | grep -P "^.*$dev_no\t" | awk '{print $2}' )
bluetoothctl remove "$dev_id"
#remove device to unpair from hard coded paired devices list
new_paired_list="$( grep -v "$dev_id" "$PAIRLIST" )"
echo "$new_paired_list" > "$PAIRLIST"
fi
cleanup;;
esac
if [ -n "$choice" ]; then
dev_no=$( echo "$paired_devices" | nl | grep -P "[0-9]+\t$choice$" | awk '{print $1}')
dev_id=$( echo "$bt_IDS" | nl | grep -P "^.*$dev_no\t" | awk '{print $2}')
bluetoothctl power on
bluetoothctl pair "$dev_id"
bluetoothctl connect "$dev_id"
fi
cleanup