Attempt to udev better

Makefile

@@ -1,3 +1,5 @@
+SUDO ?= sudo
+
 TOP_SOURCES := $(shell git ls-files | grep -vE 'README|Makefile|^config|^\.git|^\.travis' | grep -v /)
 CONFIG_SOURCES := $(shell git ls-files config)
 LOCAL_BIN_SOURCES := $(shell git ls-files local/bin)
@@ -5,7 +7,9 @@ TARGETS := \
 	$(patsubst %,$(HOME)/.%,$(TOP_SOURCES)) \
 	$(patsubst %,$(HOME)/.%,$(CONFIG_SOURCES)) \
 	$(patsubst %,$(HOME)/.%,$(LOCAL_BIN_SOURCES)) \
-	$(HOME)/.config/i3/config
+	$(HOME)/.config/i3/config \
+	/etc/udev/rules.d/90-trackman-marble.rules \
+	/usr/local/bin/handle-trackman-marble
 
 $(HOME)/.%: %
 	$(RM) '$@' && mkdir -p $(dir $@) && ln -svf '$(PWD)/$^' '$@'
@@ -19,6 +23,12 @@ $(HOME)/.config:
 $(HOME)/.local/bin:
 	mkdir -p $@
 
+/etc/udev/rules.d/90-trackman-marble.rules: udev/rules.d/90-trackman-marble.rules
+	$(SUDO) install -m 0644 -v udev/rules.d/90-trackman-marble.rules $@
+
+/usr/local/bin/handle-trackman-marble: udev/handle-trackman-marble
+	$(SUDO) install -m 0644 -v udev/handle-trackman-marble $@
+
 .PHONY: echo
 echo:
 	@echo TOP_SOURCES=$(TOP_SOURCES)

udev/handle-trackman-marble

@@ -1,14 +1,17 @@
 #!/usr/bin/env bash
 set -o errexit
+set -o pipefail
 
 main() {
-  export RUNNING_AS="${RUNNING_AS:-me}"
-  export RUNNING_AS_ID="$(id -u "${RUNNING_AS}")"
-  export XINPUT_EXE="${XINPUT_EXE:=xinput}"
+  export RUNNING_AS="${RUNNING_AS:-dan}"
+  RUNNING_AS_ID="$(id -u "${RUNNING_AS}")"
+  export RUNNING_AS_ID
 
-  export XAUTHORITY="/home/${RUNNING_AS}/.Xauthority"
+  export XINPUT_EXE="${XINPUT_EXE:=xinput}"
+  export XAUTHORITY="/run/user/${RUNNING_AS_ID}/gdm/Xauthority"
   export DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/${RUNNING_AS_ID}/bus"
-  export DISPLAY=:0
+  : "${DISPLAY:=0}"
+  export DISPLAY
   export HOME="/home/${RUNNING_AS}"
 
 
@@ -25,8 +28,14 @@ main() {
     __get_prop_id "${device_id}" 'Scroll Method Enabled'
   )"
 
+  local scrollbutton
+  scrollbutton="$(
+    __get_prop_id "${device_id}" 'Button Scrolling Button'
+  )"
+
   __run_xinput_as set-prop "${device_id}" "${natscroll_enabled}" 1
   __run_xinput_as set-prop "${device_id}" "${scrollmeth_enabled}" 0 0 1
+  __run_xinput_as set-prop "${device_id}" "${scrollbutton}" 8
 }
 
 __get_device_id() {

udev/rules.d/90-trackman-marble.rules

@@ -1 +1 @@
-ACTION=="bind", SUBSYSTEM=="usb", ENV{ID_VENDOR}=="Logitech", ENV{ID_SERIAL}=="Logitech_USB_Trackball", RUN:="/usr/local/bin/handle-trackman-marble"
+ACTION=="bind", SUBSYSTEM=="usb", ENV{NAME}=="Logitech USB Trackball", MODE="0660", TAG+="uaccess", RUN:="/usr/local/bin/handle-trackman-marble"