xwin-tabletd: Allow manual override from sxhkd if and when accelerometer fails

Author: microsounds

.config/sxhkd/default

@@ -49,8 +49,7 @@ ctrl + alt + {Delete,Insert}
 # rotate display orientation
 shift + super + {Up,Down,Left,Right}
 	sfx-synth btn & \
-	xrandr --output "$(xrandr | grep '[^dis]connected' | tr -s ' ' '\t' | cut -f1)" \
-		   --rotate "{inverted,normal,right,left}"
+	echo '{bottom-up,normal,right-up,left-up}' >> ~/.rotate
 
 ## function keys
 # F1: power/reboot

.local/bin/xwin-tabletd

@@ -1,6 +1,6 @@
 #!/usr/bin/env sh
 
-# xwin-tabletd v0.2
+# xwin-tabletd v0.3
 # rotates display and digitizer input based on accelerometer
 
 # detect primary display
@@ -15,14 +15,19 @@ ptr_devices="$(xinput list --name-only | egrep -i '(touchpad|trackpoint)')"
 
 trap 'kill $!' 0 1 2 3 6 15
 
-# workaround: repeatedly poke at iio-sensor-proxy on a timer to avoid
-# aggressive battery optimization
+# workarounds for iio-sensor-proxy
+# repeatedly poke accelerometer on a timer to avoid aggressive battery optimization
 while :; do
 	cat /sys/bus/iio/devices/iio:device0/in_accel_x_raw > /dev/null
 	sleep 2
 done &
 
-monitor-sensor | while read -r line; do
+# sxhkd: allows manual override if and when accelerometer stops responding
+RFIFO="$HOME/.rotate"
+[ ! -p "$RFIFO" ] && mkfifo "$RFIFO"
+monitor-sensor >> "$RFIFO" &
+
+while read -r line; do
 	state="${line##* }"
 	unset rot mat
 	case "$state" in
@@ -48,4 +53,4 @@ monitor-sensor | while read -r line; do
 				[ "$rot" = "normal" ] && xinput enable "$f" || xinput disable "$f"
 		done &
 	fi
-done
+done < "$RFIFO"