A couple of socket fixes so root fenrir and user fenrir do not battle.

src/fenrirscreenreader/remoteDriver/unixDriver.py

@@ -23,7 +23,7 @@ class driver(remoteDriver):
     def __init__(self):
         remoteDriver.__init__(self)
         self.fenrirSocks = []
-        self.socket_files = []
+        self.bound_sockets = []
 
     def initialize(self, environment):
         self.env = environment
@@ -94,11 +94,16 @@ class driver(remoteDriver):
 
     def _register_instance(self):
         settings_manager = self.env["runtime"]["SettingsManager"]
+        active_socket_files = [
+            socket_file
+            for fenrir_sock, socket_file in self.bound_sockets
+            if self._socket_file_matches_socket(fenrir_sock, socket_file)
+        ]
         instance_data = {
             "pid": os.getpid(),
             "ppid": os.getppid(),
-            "socket_files": self.socket_files,
-            "main_socket": MAIN_SOCKET_FILE in self.socket_files,
+            "socket_files": active_socket_files,
+            "main_socket": MAIN_SOCKET_FILE in active_socket_files,
             "screen_driver": settings_manager.get_setting("screen", "driver"),
             "keyboard_driver": settings_manager.get_setting("keyboard", "driver"),
             "x11_window_id": settings_manager.get_setting(
@@ -108,6 +113,17 @@ class driver(remoteDriver):
         }
         remoteInstanceRegistry.write_instance(instance_data)
 
+    def _socket_file_matches_socket(self, fenrir_sock, socket_file):
+        try:
+            socket_stat = os.stat(socket_file)
+            fd_stat = os.fstat(fenrir_sock.fileno())
+        except OSError:
+            return False
+        return (
+            socket_stat.st_dev == fd_stat.st_dev
+            and socket_stat.st_ino == fd_stat.st_ino
+        )
+
     def _cleanup(self):
         for fenrir_sock in self.fenrirSocks:
             try:
@@ -116,13 +132,16 @@ class driver(remoteDriver):
                 pass
         self.fenrirSocks = []
 
-        for socket_file in self.socket_files:
+        for _, socket_file in self.bound_sockets:
             try:
-                if os.path.exists(socket_file):
+                if (
+                    os.path.exists(socket_file)
+                    and not self._is_socket_active(socket_file)
+                ):
                     os.unlink(socket_file)
             except OSError:
                 pass
-        self.socket_files = []
+        self.bound_sockets = []
         remoteInstanceRegistry.remove_instance()
 
     def _handle_client(self, client_sock, event_queue):
@@ -167,7 +186,7 @@ class driver(remoteDriver):
             if fenrir_sock is None:
                 continue
             self.fenrirSocks.append(fenrir_sock)
-            self.socket_files.append(socket_file)
+            self.bound_sockets.append((fenrir_sock, socket_file))
 
         if not self.fenrirSocks:
             return