Everything works

Removed setting the UDC for now as the service runs before the other
init scripts

selinux is a complete pain, but I need to figure out a way to make it so
that you can use hidg devices without root; preferably with a way for an
android app to request access.

customize.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
-chmod 755 $MODPATH/bin/ghid.sh
-sed "s@\[MODDIR\]@$MODPATH@g" "$MODPATH/overlay.d/ghid.rc" | sed 's/modules_update/modules/g' >"$TMPDIR/ghid.rc"
-cp "$TMPDIR/ghid.rc" "$MODPATH/overlay.d/ghid.rc"
+chmod 755 "$MODPATH/system/bin/ghid.sh"
+sed "s@\[MODDIR\]@$MODPATH@g" "$MODPATH/system/bin/ghid.sh" | sed 's/modules_update/modules/g' >"$TMPDIR/ghid.sh"
+cp "$TMPDIR/ghid.sh" "$MODPATH/system/bin/ghid.sh"
 
 rpwd="$PWD"
 

module.prop

@@ -1,6 +1,6 @@
 id=ghid
 name=ghid
 version=0
-versionCode=20
+versionCode=23
 author=lordwelch
 description=creates ghid device files in /dev

overlay.d/ghid.rc

@@ -1,2 +1,8 @@
 on property:sys.usb.ffs.ready=1 && property:sys.usb.config=* && property:sys.usb.configfs=1
-    exec u:object_r:magisk:s0 root root -- [MODDIR]/bin/ghid.sh setup ${sys.usb.config}
+    start ghid
+
+service ghid /system/bin/ghid.sh setup ${sys.usb.config}
+    user root
+    seclabel u:r:magisk:s0
+    disabled
+    oneshot

system/bin/ghid.sh

@@ -1,13 +1,12 @@
 #!/system/bin/sh
 # $1 setup
 controller=$(getprop sys.usb.controller)
-moddir=${0%bin/*}
+moddir=[MODDIR]
 selected=standard-keyboard
 remove_ghid() {
         echo "disabling ghid" >>$moddir/ghid.log
         rm /config/usb_gadget/g1/configs/b.1/fhid
         rmdir /config/usb_gadget/g1/functions/hid.usb0
-        echo "$controller" >/config/usb_gadget/g1/UDC
 }
 
 enable_ghid() {
@@ -43,8 +42,6 @@ enable_ghid() {
         cp "$moddir/reports/$report_names" /config/usb_gadget/g1/functions/hid.usb0/report_desc
         cd /config/usb_gadget/g1/configs/b.1/
         /data/adb/magisk/busybox ln -nsf ../../../../usb_gadget/g1/functions/hid.usb0 ./fhid
-        echo none >/config/usb_gadget/g1/UDC
-        echo "$controller" >/config/usb_gadget/g1/UDC
 }
 
 echo success ghid was run >>$moddir/ghid.log