use bash procsub

.local/bin/remapd

@@ -1,10 +1,8 @@
-#!/bin/sh
+#!/bin/bash
 
 # Rerun the remaps script whenever a new input device is added.
 
 while :; do
-    udevadm monitor -u -t seat -s input -s usb | grep --line-buffer -m1 -P '[^un]bind'
-    sleep 1
-	remaps us:dvorak
+	remaps
+	grep -qP -m1 '[^un]bind.+\/[^:]+\(usb\)' <(udevadm monitor -u -t seat -s input -s usb)
 done
-

.local/bin/remaps

@@ -8,4 +8,4 @@ setxkbmap -option caps:super,altwin:menu_win
 # When caps lock is pressed only once, treat it as escape.
 killall xcape 2>/dev/null ; xcape -e 'Super_L=Escape'
 # Turn off caps lock if on since there is no longer a key for it.
-xset -q | grep "Caps Lock:\s*on" && xdotool key Caps_Lock
+xset -q | grep -q "Caps Lock:\s*on" && xdotool key Caps_Lock