Merge branch 'input' into monitor-support

src/rules/90-hid-mouse.rules

@@ -3,7 +3,9 @@
 # insertion, removal. Actually, usb events are triggered when usb and
 # usb interface are binding but hid is more specific and happen once for each
 # action. change action is not used because 
-SUBSYSTEM=="hid", ACTION=="bind", RUN+="/usr/local/bin/changemouse.py"
+# XAUTHORUTY and DISPLAY must be set and related to the current session. It may
+# vary with different graphic drivers.
+SUBSYSTEM=="hid", ENV{DISPLAY}=":0", ENV{XAUTHORITY}="/run/user/1000/gdm/Xauthority", ACTION=="bind", RUN+="/usr/local/bin/changemouse.py"
 
 # the following line may not be needed as when we unplug a mouse it would
 # automatically remove devices from the list and they need no furthur

src/scripts/python/util/x.py

@@ -1,14 +1,23 @@
 import subprocess
 from pathlib import Path
+import os
 
 ENCODING = "utf-8"
+XINPUT = "/ust/bin/xinput"
+
+
+def exec_xinput(args: list):
+    args.insert(0, XINPUT)
+    _read, _write = os.pipe()
+    write_fd = os.fdopen(_write, "w", 0)
+    os.read()
 
 
 def get_list_short():
     """Returns string output of the `xinput --list --short` command encoded as
     UTF-8"""
     completed = subprocess.run(
-        ["xinput", "--list", "--short"], capture_output=True
+        [XINPUT, "--list", "--short"], capture_output=True
     )
     return completed.stdout.decode(ENCODING)
 
@@ -23,7 +32,7 @@ def get_list_short_with(id):
         ValueError: in case of id not found in devices
     """
     completed = subprocess.run(
-        ["xinput", "--list", "--short", str(id)], capture_output=True
+        [XINPUT, "--list", "--short", str(id)], capture_output=True
     )
 
     if completed.returncode == 0:
@@ -43,7 +52,7 @@ def reattach(id, master):
     id is not valid, xinput will not do anything and nothing bad will happen :)
     """
     completed = subprocess.run(
-        ["xinput", "--reattach", str(id), str(master)], capture_output=True
+        [XINPUT, "--reattach", str(id), str(master)], capture_output=True
     )
 
     return completed.returncode
@@ -52,7 +61,7 @@ def reattach(id, master):
 def get_ids():
     """returns list of ids registered in xinput"""
     completed = subprocess.run(
-        ["xinput", "--list", "--id-only"], capture_output=True
+        [XINPUT, "--list", "--id-only"], capture_output=True
     )
     return list(map(int, completed.stdout.decode(ENCODING).split()))
 
@@ -63,7 +72,7 @@ def create_master(name: str = "touch"):
     Args:
         name (str, optional): name of the master. Defaults to 'touch'.
     """
-    completed = subprocess.run(["xinput", "create-master", name])
+    completed = subprocess.run([XINPUT, "create-master", name])
 
     return completed.returncode
 
@@ -75,7 +84,7 @@ def get_xi_id_by_name(name):
         name (str): name of the device
     """
     completed = subprocess.run(
-        ["xinput", "list", "--id-only", name], capture_output=True
+        [XINPUT, "list", "--id-only", name], capture_output=True
     )
 
     if completed.returncode == 1: