Update changelog for 0.0.4-1+deb12+1 release

Release version 0.0.4

data/dbus-policy/com.revolutionpi.middleware1.conf

@@ -1,4 +1,4 @@
-<!-- /etc/dbus-1/system.d/revpi-middleware.conf -->
+<!-- /usr/share/dbus-1/system.d/com.revolutionpi.middleware1.conf -->
 <busconfig>
     <!-- Allow full access to root as the bus owner -->
     <policy user="root">
@@ -12,7 +12,7 @@
         <allow send_destination="com.revolutionpi.middleware1"
                send_interface="org.freedesktop.DBus.Introspectable"/>
         <allow send_destination="com.revolutionpi.middleware1"
-               send_interface="com.revolutionpi.middleware1.picontrol"/>
+               send_interface="com.revolutionpi.middleware1.PiControl"/>
     </policy>
 
     <!-- Standard-Policy -->

debian/changelog

@@ -0,0 +1,88 @@
+revpi-middleware (0.0.4-1+deb12+1) bookworm; urgency=medium
+
+  * fix(dbus): Update DBus policy file path and interface name
+  * fix(dbus): Update systemd interface and path handling
+  * doc(revpiconfig): Add detailed docstrings to ConfigTxt methods
+  * doc(revpiconfig): Add docstrings to `RevPiConfig` class and methods
+  * doc(revpiconfig): Add docstrings to enums in `revpi_config.py`
+  * doc(revpiconfig): Docstrings for `get_rfkill_index` and `simple_systemd`
+
+ -- Sven Sager <s.sager@kunbus.com>  Tue, 22 Apr 2025 11:08:12 +0200
+
+revpi-middleware (0.0.3-1+deb12+1) bookworm; urgency=medium
+
+  * refactor: Update interface name from 'picontrol' to 'PiControl'
+  * feat(dbus): Add `grep` function to search for patterns in a file
+  * fix(cli): Change absolute imports to relative imports
+  * feat(dbus): Add D-Bus interface for system configuration in middleware
+  * feat(dbus): Add GUI configuration handling to interface_config.py
+  * feat(revpiconfig): Add RevPiConfig class for device information handling
+  * refactor(dbus): Move system configuration methods to revpi_config.py
+  * feat(dbus): Remove 'var-log.mount' feature
+  * feat(dbus): Add avahi-daemon configuration to system services
+  * feat(dbus): Add dphys-swapfile configuration functionality
+  * feat(revpiconfig): Add ConfigTxt class for managing config.txt file
+  * feat(dbus): Add support for configuring the external antenna
+  * feat(dbus): Add support for configuring 'revpi-con-can' feature
+  * feat(revpiconfig): Enhance Wi-Fi detection and add rfkill index support
+  * feat(dbus): Add Wi-Fi configuration support to the system config
+  * refactor(revpiconfig: Change Wi-Fi detection and rfkill index logic
+  * feat(dbus): Add Bluetooth configuration functionality
+  * feat(dbus): Add InterfaceRevpiConfig to DBus interfaces list
+  * feat(cli): Add `get_properties` helper function for DBus interactions
+  * feat(cli): Add CLI command for configuring Revpi features
+  * feat(cli): Add CLI support for RevPi configuration object (revpi-config)
+  * feat(revpiconfig): Replace rfkill subprocess calls with sysfs writes
+  * refactor: Rename WiFi to WLAN for consistent terminology
+  * feat(deb): Add dependencies for `dtoverlay` command
+
+ -- Sven Sager <s.sager@kunbus.com>  Mon, 21 Apr 2025 13:44:18 +0200
+
+revpi-middleware (0.0.2-1+deb12+1) bookworm; urgency=medium
+
+  * refactor(dbus): Move D-Bus helper functions to a dedicated file
+  * refactor(dbus): Move ResetDriverWatchdog to process_image_helper.py
+  * refactor(dbus): Parameterize `picontrol_device` and `config_rsc`
+  * feat: Add session bus option for local testing and development
+  * feat(dbus): Add import for BusProvider in dbus_middleware1 module
+  * feat(dbus): Add `running` property to `BusProvider`
+  * refactor(cli): D-Bus helpers support session and system bus types
+  * fix(dbus): Add error handling for DBus publishing and main loop
+  * refactor(dbus): piControl driver reset with PiControlIoctl class
+  * test(dbus): Add unit test framework for dbus_middleware1 module
+  * test(dbus): Add unit tests for PiControl D-Bus interface
+  * refactor(dbus): Fix typo and remove unused thread instance
+  * refactor(dbus): D-Bus interface management with cleanup support.
+  * test(dbus): Add support for testing driver reset notification
+  * feat(deb): Add dbus for testing to build dependencies
+  * fix(deb): Skip tests because of missing SystemBus in build container
+
+ -- Sven Sager <s.sager@kunbus.com>  Sat, 19 Apr 2025 16:34:20 +0200
+
+revpi-middleware (0.0.1-1+deb12+1) bookworm; urgency=medium
+
+  * docs: Start git project with python git-ignore and Readme
+  * docs: Use 'reuse' for SPDX Headers and Licenses
+  * feat: Add python base project files
+  * feat: Add proginit application basic module
+  * feat: Add the data directory for additional data files for the project
+  * test: Add tests directory with a dummy test
+  * build: Add all necessary files for the build system
+  * feat: Add dummy main application script
+  * feat: Add systemd file and data to integrate the app as a daemon
+  * chore: Update proginit to 1.4.0
+  * feat(dbus): Add ResetDriverWatchdog helper as global dbus helper
+  * feat(process_image): Add D-Bus interface for piControl driver
+  * feat(dbus): Add initial D-Bus middleware implementation
+  * feat(dbus): Add `extend_interface` function for dynamic interface naming
+  * feat(dbus): Add DBus policy configuration for revpi-middleware
+  * feat: Add MiddlewareDaemon implementation to revpi-middleware
+  * feat: Add daemon mode and signal handling to main application
+  * feat(cli): Add D-Bus helper functions for CLI commands.
+  * feat(cli): Add await_signal function to handle D-Bus signals
+  * feat(cli): Add `await-reset` to wait for piControl reset signal
+  * chore(build): Update requirements for this project
+  * feat(cli): Add new CLI tool entry point for `revpictl`
+  * feat(deb): Start packaging branch
+
+ -- Sven Sager <s.sager@kunbus.com>  Fri, 18 Apr 2025 19:02:20 +0200

debian/control

@@ -0,0 +1,39 @@
+Source: revpi-middleware
+Section: python
+Priority: optional
+Maintainer: KUNBUS GmbH <support@kunbus.com>
+Rules-Requires-Root: no
+Homepage: https://revolutionpi.com/
+Vcs-Browser: https://gitlab.com/revolutionpi/revpi-middleware
+Vcs-Git: https://gitlab.com/revolutionpi/revpi-middleware.git -b debian/bookworm
+Build-Depends:
+  dbus,
+  dbus-x11,
+  debhelper-compat (= 13),
+  dh-python,
+  python3-all,
+  python3-gi (>= 3.42.2),
+  python3-pydbus (>= 0.6.0),
+  python3-setuptools,
+Standards-Version: 4.6.2
+
+Package: revpi-middleware
+Architecture: all
+Pre-Depends: ${misc:Pre-Depends}
+Depends:
+  raspi-utils-dt | libraspberrypi-bin,
+  ${python3:Depends},
+  ${misc:Depends}
+Description: Revolution Pi middleware with D-Bus interface
+ The Revolution Pi middleware provides a robust communication interface for
+ Revolution Pi industrial computers. It enables seamless integration between
+ hardware components and applications through a D-Bus interface. The middleware
+ serves as a bridge for data exchange, device configuration, and system
+ monitoring.
+ .
+ Key features:
+  * Hardware abstraction layer for Revolution Pi I/O modules
+  * Real-time data processing and event handling
+  * Simplified API for accessing Revolution Pi hardware features
+  * Extensive configuration options for industrial automation tasks
+  * Built-in monitoring and diagnostic capabilities

debian/copyright

@@ -0,0 +1,27 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Source: https://gitlab.com/revolutionpi/opcua-revpi-server
+
+Files: *
+Copyright: 2025 KUNBUS GmbH
+License: GPL-2+
+
+Files: debian/*
+Copyright: 2025 KUNBUS GmbH
+License: GPL-2+
+
+License: GPL-2+
+ This package is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+ .
+ This package is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+ .
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>
+ .
+ On Debian systems, the complete text of the GNU General
+ Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".

debian/gbp.conf

@@ -0,0 +1,7 @@
+[DEFAULT]
+upstream-branch = main
+upstream-tag = v%(version)s
+debian-branch=debian/bookworm
+debian-tag = debian/%(version)s
+debian-tag-msg = %(pkg)s Debian release %(version)s
+pristine-tar = True

debian/revpi-middleware.install

@@ -0,0 +1,4 @@
+data/dbus-policy/com.revolutionpi.middleware1.conf      /usr/share/dbus-1/system.d
+data/etc/default/revpi-middleware                       /etc/default/
+data/etc/revpi-middleware/revpi-middleware.conf         /etc/revpi-middleware/
+data/systemd/before_253/revpi-middleware.service        /lib/systemd/system/

debian/revpi-middleware.links

@@ -0,0 +1,2 @@
+/usr/share/revpi-middleware/revpi-middleware	/usr/sbin/revpi-middleware
+/usr/share/revpi-middleware/revpicli	/usr/bin/revpicli

debian/rules

@@ -0,0 +1,12 @@
+#!/usr/bin/make -f
+
+export PYBUILD_NAME=revpi-middleware
+export PYBUILD_INSTALL_ARGS=--install-lib=/usr/share/$(PYBUILD_NAME)/ --install-scripts=/usr/share/$(PYBUILD_NAME)/
+
+%:
+	dh $@ --with python3 --buildsystem=pybuild
+
+override_dh_auto_test:
+	# Currently, the tests have to be skipped, because no SystemBus is
+	# available in the Docker container.
+	@echo "Skipped tests"

debian/source/format

@@ -0,0 +1 @@
+3.0 (quilt)

src/revpi_middleware/cli_commands/cli_base.py

@@ -5,12 +5,11 @@
 This module provides the foundation for the RevPi middleware CLI commands
 and argument parsing setup.
 """
-from argparse import ArgumentParser
 from logging import getLogger
 
-from revpi_middleware.cli_commands import cli_picontrol
+from . import cli_config, cli_picontrol
-from revpi_middleware.proginit import StdLogOutput
 from .. import proginit as pi
+from ..proginit import StdLogOutput
 
 log = getLogger(__name__)
 
@@ -30,6 +29,11 @@ def setup_command_line_arguments():
         help="RevPi PiControl object",
     )
     cli_picontrol.add_subparsers(obj_picontrol)
+    obj_config = rpictl_obj.add_parser(
+        "config",
+        help="RevPi configuration object (revpi-config)",
+    )
+    cli_config.add_subparsers(obj_config)
 
 
 def main() -> int:
@@ -40,6 +44,9 @@ def main() -> int:
     if obj == "picontrol":
         rc = cli_picontrol.main()
 
+    elif obj == "config":
+        rc = cli_config.main()
+
     else:
         log.error(f"Unknown object: {obj}")
         rc = 1

src/revpi_middleware/cli_commands/cli_config.py

@@ -0,0 +1,93 @@
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""Command-Line for the picontrol object of CLI."""
+from argparse import ArgumentParser
+from logging import getLogger
+
+from .dbus_helper import BusType, get_properties, simple_call
+from .. import proginit as pi
+from ..dbus_middleware1 import extend_interface
+
+log = getLogger(__name__)
+
+
+def add_subparsers(parent_parser: ArgumentParser):
+    parent_parser.add_argument(
+        "action",
+        choices=["enable", "disable", "status", "available", "list-features"],
+        help="Action to be executed: enable, disable, status or available. "
+             "To get all available features, use 'list-features'.",
+    )
+    parent_parser.add_argument(
+        "feature",
+        nargs="?",
+        default="",
+        help="Name of the feature to configer. To list all features use 'list-features' as action.",
+    )
+
+
+def main() -> int:
+    action = pi.pargs.action
+    dbus_value = False
+    try:
+
+        if action == "list-features":
+            dbus_value = get_properties(
+                "available_features",
+                interface=extend_interface("RevpiConfig"),
+                bus_type=BusType.SESSION if pi.pargs.use_session_bus else BusType.SYSTEM,
+            )
+            for feature in dbus_value:
+                print(feature)
+
+            return 0
+
+        # For the following actions, a feature name is required
+        if pi.pargs.feature == "":
+            raise Exception("Feature name is required")
+
+        if action == "enable":
+            simple_call(
+                "Enable",
+                pi.pargs.feature,
+                interface=extend_interface("RevpiConfig"),
+                bus_type=BusType.SESSION if pi.pargs.use_session_bus else BusType.SYSTEM,
+            )
+
+        elif action == "disable":
+            simple_call(
+                "Disable",
+                pi.pargs.feature,
+                interface=extend_interface("RevpiConfig"),
+                bus_type=BusType.SESSION if pi.pargs.use_session_bus else BusType.SYSTEM,
+            )
+
+        elif action == "status":
+            dbus_value = simple_call(
+                "GetStatus",
+                pi.pargs.feature,
+                interface=extend_interface("RevpiConfig"),
+                bus_type=BusType.SESSION if pi.pargs.use_session_bus else BusType.SYSTEM,
+            )
+
+        elif action == "available":
+            dbus_value = simple_call(
+                "GetAvailability",
+                pi.pargs.feature,
+                interface=extend_interface("RevpiConfig"),
+                bus_type=BusType.SESSION if pi.pargs.use_session_bus else BusType.SYSTEM,
+            )
+
+        else:
+            raise Exception(f"Unknown action: {action}")
+
+    except Exception as e:
+        log.error(f"Error: {e}")
+        return 1
+
+    log.debug(
+        f"D-Bus call of method {action} for feature {pi.pargs.feature} returned: {dbus_value}"
+    )
+    print(int(dbus_value))
+
+    return 0

src/revpi_middleware/cli_commands/cli_picontrol.py

@@ -38,7 +38,7 @@ def method_reset():
     log.debug("D-Bus call of method ResetDriver")
     simple_call(
         "ResetDriver",
-        interface=extend_interface("picontrol"),
+        interface=extend_interface("PiControl"),
         bus_type=BusType.SESSION if pi.pargs.use_session_bus else BusType.SYSTEM,
     )
     log.info("ResetDriver called via D-Bus")
@@ -48,7 +48,7 @@ def method_await_reset(timeout: int = 0):
     detected_signal = await_signal(
         "NotifyDriverReset",
         timeout,
-        extend_interface("picontrol"),
+        extend_interface("PiControl"),
         bus_type=BusType.SESSION if pi.pargs.use_session_bus else BusType.SYSTEM,
     )
     if detected_signal:

src/revpi_middleware/cli_commands/dbus_helper.py

@@ -17,6 +17,18 @@ class BusType(Enum):
     SYSTEM = "system"
 
 
+def get_properties(
+    property_name: str,
+    interface: str,
+    object_path=REVPI_DBUS_BASE_PATH,
+    bus_type=BusType.SYSTEM,
+):
+    bus = SessionBus() if bus_type is BusType.SESSION else SystemBus()
+    revpi = bus.get(REVPI_DBUS_NAME, object_path)
+    iface = revpi[interface]
+    return getattr(iface, property_name)
+
+
 def simple_call(
     method: str,
     *args,

src/revpi_middleware/dbus_middleware1/bus_provider.py

@@ -10,6 +10,7 @@ from pydbus import SessionBus, SystemBus
 
 from . import REVPI_DBUS_NAME
 from .process_image import InterfacePiControl
+from .system_config import InterfaceRevpiConfig
 
 log = getLogger(__name__)
 
@@ -41,6 +42,7 @@ class BusProvider(Thread):
         #   ("Subdir2/Whatever", Example())
         lst_interfaces = [
             InterfacePiControl(self.picontrol_device, self.config_rsc),
+            InterfaceRevpiConfig(),
         ]
 
         try:

src/revpi_middleware/dbus_middleware1/dbus_helper.py

@@ -41,3 +41,38 @@ def extend_interface(*args) -> str:
             the provided segments.
     """
     return ".".join([REVPI_DBUS_NAME, *args])
+
+
+def grep(pattern, filename):
+    """
+    Searches for lines in a file that contain a given pattern and returns them as a list.
+
+    The function reads lines from the specified file and checks whether each line
+    contains the provided pattern. It returns a list of lines that match the
+    pattern. If the file is not found, an empty list is returned. Any other
+    exceptions during the file reading process are caught and logged.
+
+    Args:
+        pattern (str): The substring to search for within the file's lines.
+        filename (str): The path to the file that will be searched.
+
+    Returns:
+        list[str]: A list containing lines that include the provided pattern, with
+        leading and trailing spaces removed.
+
+    Raises:
+        FileNotFoundError: This error is caught if the file specified is not
+        found.
+        Exception: Any unforeseen exception during file operations is caught and
+        logged.
+    """
+    try:
+        with open(filename, "r") as file:
+            # Gibt alle Zeilen zurück, die das Muster enthalten
+            matching_lines = [line.strip() for line in file if pattern in line]
+            return matching_lines
+    except FileNotFoundError:
+        return []
+    except Exception as e:
+        log.error(f"Error reading file: {e}")
+        return []

src/revpi_middleware/dbus_middleware1/process_image/interface_picontrol.py

@@ -15,7 +15,7 @@ log = getLogger(__name__)
 class InterfacePiControl(DbusInterface):
     """
     <node>
-        <interface name='com.revolutionpi.middleware1.picontrol'>
+        <interface name='com.revolutionpi.middleware1.PiControl'>
             <signal name="NotifyDriverReset">
             </signal>
             <method name='ResetDriver'>

src/revpi_middleware/dbus_middleware1/system_config/__init__.py

@@ -0,0 +1,5 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""D-Bus interfaces for system configuration."""
+from .interface_config import InterfaceRevpiConfig

src/revpi_middleware/dbus_middleware1/system_config/interface_config.py

@@ -0,0 +1,100 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+"""D-Bus interfaces for hardware configuration."""
+from collections import namedtuple
+from logging import getLogger
+
+from .revpi_config import (
+    ConfigActions,
+    configure_avahi_daemon,
+    configure_bluetooth,
+    configure_con_can,
+    configure_dphys_swapfile,
+    configure_external_antenna,
+    configure_gui,
+    configure_wlan,
+    simple_systemd,
+)
+from ..dbus_helper import DbusInterface
+
+log = getLogger(__name__)
+
+FeatureFunction = namedtuple("FeatureFunction", ["function", "args"])
+
+
+class InterfaceRevpiConfig(DbusInterface):
+    """
+    <node>
+        <interface name="com.revolutionpi.middleware1.RevpiConfig">
+            <method name="Disable">
+                <arg name="feature" type="s" direction="in"/>
+            </method>
+            <method name="Enable">
+                <arg name="feature" type="s" direction="in"/>
+            </method>
+            <method name="GetStatus">
+                <arg name="feature" type="s" direction="in"/>
+                <arg name="status" type="b" direction="out"/>
+            </method>
+            <method name="GetAvailability">
+                <arg name="feature" type="s" direction="in"/>
+                <arg name="available" type="b" direction="out"/>
+            </method>
+            <property name="available_features" type="as" access="read"/>
+        </interface>
+    </node>
+    """
+
+    def Disable(self, feature: str) -> None:
+        """Disable the feature."""
+        feature_function = get_feature(feature)
+        feature_function.function(ConfigActions.DISABLE, *feature_function.args)
+
+    def Enable(self, feature: str) -> None:
+        """Enable the feature."""
+        feature_function = get_feature(feature)
+        feature_function.function(ConfigActions.ENABLE, *feature_function.args)
+
+    def GetStatus(self, feature: str) -> bool:
+        """Get feature status."""
+        feature_function = get_feature(feature)
+        return feature_function.function(ConfigActions.STATUS, *feature_function.args)
+
+    def GetAvailability(self, feature: str) -> bool:
+        """Get feature availability on the RevPi."""
+        feature_function = get_feature(feature)
+        return feature_function.function(ConfigActions.AVAILABLE, *feature_function.args)
+
+    @property
+    def available_features(self) -> list[str]:
+        return list(AVAILABLE_FEATURES.keys())
+
+
+def get_feature(feature: str) -> FeatureFunction:
+    if feature not in AVAILABLE_FEATURES:
+        raise ValueError(f"feature {feature} does not exist")
+    feature_function = AVAILABLE_FEATURES[feature]
+    if not feature_function:
+        raise NotImplementedError(f"feature {feature} is not implemented")
+    return feature_function
+
+
+AVAILABLE_FEATURES = {
+    "gui": FeatureFunction(configure_gui, []),
+    "revpi-con-can": FeatureFunction(configure_con_can, []),
+    "dphys-swapfile": FeatureFunction(configure_dphys_swapfile, []),
+    "pimodbus-master": FeatureFunction(simple_systemd, ["pimodbus-master.service"]),
+    "pimodbus-slave": FeatureFunction(simple_systemd, ["pimodbus-slave.service"]),
+    "systemd-timesyncd": FeatureFunction(simple_systemd, ["systemd-timesyncd.service"]),
+    "ssh": FeatureFunction(simple_systemd, ["ssh.service"]),
+    "nodered": FeatureFunction(simple_systemd, ["nodered.service"]),
+    "noderedrevpinodes-server": FeatureFunction(
+        simple_systemd, ["noderedrevpinodes-server.service"]
+    ),
+    "revpipyload": FeatureFunction(simple_systemd, ["revpipyload.service"]),
+    "bluetooth": FeatureFunction(configure_bluetooth, []),
+    "wlan": FeatureFunction(configure_wlan, []),
+    "avahi": FeatureFunction(configure_avahi_daemon, []),
+    "external-antenna": FeatureFunction(configure_external_antenna, []),
+}

src/revpi_middleware/dbus_middleware1/system_config/revpi_config.py

@@ -0,0 +1,712 @@
+# -*- coding: utf-8 -*-
+# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
+# SPDX-License-Identifier: GPL-2.0-or-later
+import re
+import shutil
+import subprocess
+from collections import namedtuple
+from enum import Enum, IntEnum
+from glob import glob
+from logging import getLogger
+from os import X_OK, access
+from os.path import exists, join
+from typing import List, Optional
+
+from pydbus import SystemBus
+
+from ..dbus_helper import grep
+
+log = getLogger(__name__)
+
+ConfigVariable = namedtuple("ConfigVariable", ["name", "value", "line_index"])
+
+LINUX_BT_CLASS_PATH = "/sys/class/bluetooth"
+LINUX_WLAN_CLASS_PATH = "/sys/class/ieee80211"
+CONFIG_TXT_LOCATIONS = ("/boot/firmware/config.txt", "/boot/config.txt")
+
+
+class ComputeModuleTypes(IntEnum):
+    """
+    Enumeration class to represent compute module types.
+
+    This class is an enumeration that defines various types of compute
+    modules and assigns them associated integer values for identifying
+    different module types.
+
+    Attributes:
+        UNKNOWN (int): Represents an unknown or undefined compute module type.
+        CM1 (int): Represents a Compute Module 1.
+        CM3 (int): Represents a Compute Module 3.
+        CM4 (int): Represents a Compute Module 4.
+        CM4S (int): Represents a Compute Module 4S.
+        CM5 (int): Represents a Compute Module 5.
+    """
+    UNKNOWN = 0
+    CM1 = 6
+    CM3 = 10
+    CM4 = 20
+    CM4S = 21
+    CM5 = 24
+
+
+class ConfigActions(Enum):
+    """
+    Enumeration class for defining configuration actions.
+
+    This enumeration provides predefined constants for common configuration
+    actions. It can be used to ensure consistency when working with or defining
+    such actions in a system.
+    """
+    ENABLE = "enable"
+    DISABLE = "disable"
+    STATUS = "status"
+    AVAILABLE = "available"
+
+
+class RevPiConfig:
+    """
+    Represents the configuration and hardware details of a Revolution Pi system.
+
+    This class provides methods and properties to initialize and fetch
+    information related to the Revolution Pi device, such as model, serial
+    number, compute module type, WLAN capability, and the presence of a
+    connection bridge. The class works by parsing system-level files (e.g.,
+    `/proc/cpuinfo`) and using this data to identify hardware characteristics
+    and features.
+
+    Attributes:
+        serial (str): The serial number of the Revolution Pi device.
+        model (str): The model name of the Revolution Pi device.
+    """
+
+    def __init__(self):
+        self._cm_type = ComputeModuleTypes.UNKNOWN
+
+        self._revpi_with_con_bridge = False
+        self._wlan_class_path = ""
+
+        self.serial = ""
+        self.model = ""
+
+        self._init_device_info()
+
+    def _init_device_info(self):
+        """
+        Initialize and retrieve detailed hardware information, including CPU details,
+        device type, WLAN interface, and connectivity features.
+
+        This method gathers information from system files and other sources to
+        initialize device-specific attributes such as model, serial number,
+        compute module type, and optional features like integrated WLAN
+        or ConBridge support. It performs checks specific to the detected
+        module type to accurately populate necessary device details.
+
+        Attributes
+        ----------
+        model : str
+            The model of the CPU based on information from /proc/cpuinfo.
+        serial : str
+            The serial number extracted from /proc/cpuinfo.
+        _cm_type : ComputeModuleTypes, optional
+            The type of the compute module derived from the hardware revision value.
+        _wlan_class_path : str, optional
+            Filesystem path to the detected WLAN interface, if any.
+        _revpi_with_con_bridge : bool
+            Indicates whether the device supports the ConBridge feature.
+        """
+        dc_cpuinfo = {}
+
+        # Extract CPU information
+        with open("/proc/cpuinfo", "r") as f:
+            line = "\n"
+            while line:
+                line = f.readline()
+                if line.startswith(("Revision", "Serial", "Model")):
+                    key, value = line.split(":", 1)
+                    key = key.strip().lower()
+                    value = value.strip()
+                    dc_cpuinfo[key] = value
+
+        self.model = dc_cpuinfo.get("model", "")
+        self.serial = dc_cpuinfo.get("serial", "")
+
+        # Detect Compute Module type
+        revision = dc_cpuinfo.get("revision", "")
+        if revision:
+            revision = int(revision, 16)
+            mask = 4080  # 0xFF0 in dezimal
+            try:
+                self._cm_type = ComputeModuleTypes((revision & mask) >> 4)
+            except ValueError:
+                pass
+
+        # Detect WLAN on CM module
+        could_have_wlan = self._cm_type in (ComputeModuleTypes.CM4, ComputeModuleTypes.CM5)
+        if could_have_wlan:
+            wlan_interface = join(LINUX_WLAN_CLASS_PATH, "phy0")
+            if grep("DRIVER=brcmfmac", join(wlan_interface, "device", "uevent")):
+                self._wlan_class_path = wlan_interface
+
+        # If no build in WLAN on the CM, detect third party WLAN on RevPi Flat
+        if not self._wlan_class_path and grep("revpi-flat", "/proc/device-tree/compatible"):
+            lst_wlan_interfaces = glob("/sys/class/ieee80211/*")
+            for wlan_interface in lst_wlan_interfaces:
+                if grep("DRIVER=mwifiex_sdio", join(wlan_interface, "device", "uevent")):
+                    self._wlan_class_path = wlan_interface
+
+        # Detect ConBridge
+        could_have_con_bridge = self._cm_type in (ComputeModuleTypes.CM3, ComputeModuleTypes.CM4S)
+        if could_have_con_bridge:
+            lst_grep = grep("kunbus,revpi-connect", "/proc/device-tree/compatible")
+            self._revpi_with_con_bridge = len(lst_grep) > 0
+
+    @property
+    def class_path_wlan(self) -> str:
+        """
+        Provides access to the WLAN class path.
+
+        This property retrieves the stored WLAN class path, allowing the user to access it when
+        needed.
+
+        Returns:
+            str: The WLAN class path.
+        """
+        return self._wlan_class_path
+
+    @property
+    def cm_type(self) -> ComputeModuleTypes:
+        """
+        Gets the type of the compute module.
+
+        The property provides access to the type of the compute
+        module used. The type is represented as an instance of
+        the `ComputeModuleTypes` class.
+
+        Returns
+        -------
+        ComputeModuleTypes
+            The type of the compute module.
+        """
+        return self._cm_type
+
+    @property
+    def with_con_bridge(self) -> bool:
+        """
+        Indicates if the device is configured with a connection bridge.
+
+        This property checks the internal status and determines whether the device setup
+        includes a connection bridge functionality. It is read-only.
+
+        Returns:
+            bool: True if the connection bridge is configured, False otherwise.
+        """
+        return self._revpi_with_con_bridge
+
+    @property
+    def with_wlan(self) -> bool:
+        """
+        Checks if WLAN is available.
+
+        This property evaluates whether WLAN is enabled or available by checking
+        the presence or value of the internal attribute `_wlan_class_path`.
+
+        Returns:
+            bool: True if WLAN is available, False otherwise.
+        """
+        return bool(self._wlan_class_path)
+
+
+class ConfigTxt:
+    """
+    Configuration file handler for managing 'config.txt'.
+
+    This class provides an interface to read, modify, save, and reload
+    Raspbian's configuration file `config.txt`. It includes functionalities
+    to manipulate specific parameters within the configuration and supports
+    managing dtoverlay and dtparam entries. The primary aim of this class
+    is to abstract file operations and make modifications user-friendly.
+
+    Attributes:
+        _config_txt_path (str): The path to the configuration file `config.txt`.
+        _config_txt_lines (list[str]): Contains all lines of the configuration
+            file as a list of strings, where each string represents a line.
+    """
+    re_name_value = re.compile(r"^\s*(?!#)(?P<name>[^=\s].+?)\s*=\s*(?P<value>\S+)\s*$")
+
+    def __init__(self):
+        self._config_txt_path = ""
+        for path in CONFIG_TXT_LOCATIONS:
+            if exists(path):
+                self._config_txt_path = path
+                break
+
+        if not self._config_txt_path:
+            raise FileNotFoundError("no config.txt found")
+
+        self._config_txt_lines = []
+
+    def _clear_name_values(self, name: str, values: str or list) -> int:
+        """
+        Removes all occurrences of specified name-value pairs from the configuration.
+
+        This method searches for all name-value pairs in the configuration and
+        removes those that match the given name and value(s). It returns the
+        number of occurrences removed.
+
+        Arguments:
+            name: str
+                The name of the configuration variable to search for.
+            values: str or list
+                The value or list of values to match the configuration variable
+                against.
+
+        Returns:
+            int: The number of name-value pairs removed from the configuration.
+
+        """
+        counter = 0
+        if type(values) is str:
+            values = [values]
+
+        for config_var in self._get_all_name_values():
+            if config_var.name == name and config_var.value in values:
+                self._config_txt_lines.pop(config_var.line_index)
+                counter += 1
+
+        return counter
+
+    def _get_all_name_values(self) -> List[ConfigVariable]:
+        """
+        Retrieves all name-value pairs from the configuration text lines.
+
+        This method parses the configuration text lines to extract all name-value
+        pairs. If the configuration text lines are not loaded, it reloads the
+        configuration before processing. Each extracted name-value pair is added to a
+        list as a ConfigVariable object, which also holds the index of the match in
+        the text lines. The method returns the compiled list of these ConfigVariable
+        objects.
+
+        Returns:
+            List[ConfigVariable]: A list of ConfigVariable objects representing the
+            name-value pairs found in the configuration text lines, along with their
+            corresponding indexes.
+        """
+        if not self._config_txt_lines:
+            self.reload_config()
+
+        lst_return = []
+
+        for i in range(len(self._config_txt_lines)):
+            match = self.re_name_value.match(self._config_txt_lines[i])
+            if match:
+                lst_return.append(ConfigVariable(match.group("name"), match.group("value"), i))
+
+        return lst_return
+
+    def reload_config(self):
+        """
+        Reloads the configuration file and updates the list of configuration lines.
+
+        This method reads the content of the configuration file specified by the
+        attribute `_config_txt_path` and updates `_config_txt_lines` with the file
+        contents as a list of strings, where each string represents a line.
+
+        Returns:
+            None
+        """
+        with open(self._config_txt_path, "r") as f:
+            self._config_txt_lines = f.readlines()
+
+    def save_config(self):
+        """
+        Saves the current configuration to a file. The method ensures atomicity by first writing
+        to a temporary file and then moving it to the desired path. After the configuration is
+        saved, the internal list of configuration lines is cleared.
+
+        Raises:
+            OSError: If there is an issue writing to or moving the file.
+        """
+        if not self._config_txt_lines:
+            return
+
+        tmp_path = f"{self._config_txt_path}.tmp"
+        with open(tmp_path, "w") as f:
+            f.writelines(self._config_txt_lines)
+        shutil.move(tmp_path, self._config_txt_path)
+
+        self._config_txt_lines.clear()
+
+    def add_name_value(self, name: str, value: str):
+        """
+        Adds a name-value pair to the configuration if it does not already exist.
+
+        This method checks if the given name-value pair is already present in
+        the configuration. If it is not present, the pair is appended to the
+        configuration text lines.
+
+        Parameters:
+            name (str): The name to be added to the configuration.
+            value (str): The value corresponding to the name to be added.
+
+        Returns:
+            None
+        """
+        # Check weather name and value already exists
+        for config_var in self._get_all_name_values():
+            if config_var.name == name and config_var.value == value:
+                return
+
+        self._config_txt_lines.append(f"{name}={value}\n")
+
+    def clear_dtoverlays(self, dtoverlays: str or list) -> int:
+        """
+        Clears the specified device tree overlays. This method removes one or more
+        device tree overlays by clearing their corresponding name-value pairs.
+
+        Args:
+            dtoverlays (str or list): A device tree overlay name as a string, or a
+            list of such overlay names to be cleared.
+
+        Returns:
+            int: The number of device tree overlay name-value pairs successfully
+            cleared.
+        """
+        return self._clear_name_values("dtoverlay", dtoverlays)
+
+    def clear_dtparams(self, dtparams: str or list) -> int:
+        """
+        Clears the specified device tree parameters.
+
+        This method removes the given device tree parameters by utilizing
+        the underlying `_clear_name_values` function with a predefined
+        parameter type.
+
+        Parameters:
+        dtparams: str or list
+            A string or list of strings specifying the device tree
+            parameters to remove.
+
+        Returns:
+        int
+            The number of parameters cleared.
+        """
+        return self._clear_name_values("dtparam", dtparams)
+
+    def get_values(self, var_name: str) -> list:
+        """
+        Get all values associated with a given variable name.
+
+        This method retrieves a list of values corresponding to the specified
+        variable name by iterating through a collection of configuration
+        variables. Each configuration variable is checked for a matching name,
+        and its value is appended to the resulting list if a match is found.
+
+        Parameters:
+        var_name (str): The name of the variable for which values are to
+                        be retrieved.
+
+        Returns:
+        list: A list of values associated with the specified variable name.
+        """
+        var_values = []
+
+        for config_var in self._get_all_name_values():
+            if config_var.name == var_name:
+                var_values.append(config_var.value)
+
+        return var_values
+
+    @property
+    def config_txt_path(self) -> str:
+        """
+        Get the file path for the configuration text file.
+
+        This property provides access to the private attribute `_config_txt_path` which
+        stores the file path to the configuration text file.
+
+        Returns:
+        str
+            The file path to the configuration text file.
+        """
+        return self._config_txt_path
+
+
+def configure_avahi_daemon(action: ConfigActions):
+    return_value = simple_systemd(action, "avahi-daemon.service")
+
+    # Post actions for avahi-daemon
+    if action in (ConfigActions.ENABLE, ConfigActions.DISABLE):
+        # Apply the enable/disable action to the avahi socket AFTER the service
+        # unit, because a connected socket could interrupt stop
+        simple_systemd(action, "avahi-daemon.socket")
+
+    return return_value
+
+
+def configure_bluetooth(action: ConfigActions):
+    hci_device = join(LINUX_BT_CLASS_PATH, "hci0")
+    bt_rfkill_index = get_rfkill_index(hci_device)
+
+    # If the bluetooth device is not present, the device should have been
+    # brought up by revpi-bluetooth's udev rules or vendor magic (devices
+    # based on CM4 and newer). Nothing we can do here, so treat the interface
+    # as disabled.
+
+    if action is ConfigActions.ENABLE:
+        if bt_rfkill_index is not None:
+            with open(f"/sys/class/rfkill/rfkill{bt_rfkill_index}/soft", "w") as f:
+                f.write("0")
+
+    elif action is ConfigActions.DISABLE:
+        if bt_rfkill_index is not None:
+            with open(f"/sys/class/rfkill/rfkill{bt_rfkill_index}/soft", "w") as f:
+                f.write("1")
+
+    elif action is ConfigActions.STATUS:
+        if bt_rfkill_index is None:
+            return False
+
+        with open(f"/sys/class/rfkill/rfkill{bt_rfkill_index}/soft", "r") as f:
+            buffer = f.read().strip()
+            return buffer == "0"
+
+    elif action is ConfigActions.AVAILABLE:
+        return bt_rfkill_index is not None
+
+    else:
+        raise ValueError(f"action {action} not supported")
+
+    return None
+
+
+def configure_con_can(action: ConfigActions):
+    revpi = RevPiConfig()
+    if action is ConfigActions.AVAILABLE:
+        return revpi.with_con_bridge
+
+    dt_overlay = "revpi-con-can"
+    config_txt = ConfigTxt()
+
+    if action is ConfigActions.ENABLE and revpi.with_con_bridge:
+        config_txt.clear_dtoverlays([dt_overlay])
+        config_txt.add_name_value("dtoverlay", dt_overlay)
+        config_txt.save_config()
+        subprocess.call(["/usr/bin/dtoverlay", dt_overlay])
+
+    elif action is ConfigActions.DISABLE and revpi.with_con_bridge:
+        config_txt.clear_dtoverlays([dt_overlay])
+        config_txt.save_config()
+        subprocess.call(["/usr/bin/dtoverlay", "-r", dt_overlay])
+
+    elif action is ConfigActions.STATUS:
+        return revpi.with_con_bridge and dt_overlay in config_txt.get_values("dtparam")
+
+    else:
+        raise ValueError(f"action {action} not supported")
+
+    return None
+
+
+def configure_dphys_swapfile(action: ConfigActions):
+    return_value = simple_systemd(action, "dphys-swapfile.service")
+
+    # Post actions for dphys-swapfile
+    if action is ConfigActions.DISABLE:
+        # Remove swapfile afer disabling the service unit
+        subprocess.call(
+            ["/sbin/dphys-swapfile", "uninstall"],
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.DEVNULL,
+        )
+
+    return return_value
+
+
+def configure_external_antenna(action: ConfigActions):
+    revpi = RevPiConfig()
+    if action is ConfigActions.AVAILABLE:
+        return revpi.with_wlan
+
+    config_txt = ConfigTxt()
+
+    if action is ConfigActions.ENABLE and revpi.with_wlan:
+        config_txt.clear_dtparams(["ant1", "ant2"])
+        config_txt.add_name_value("dtparam", "ant2")
+        config_txt.save_config()
+
+    elif action is ConfigActions.DISABLE and revpi.with_wlan:
+        config_txt.clear_dtparams(["ant1", "ant2"])
+        config_txt.save_config()
+
+    elif action is ConfigActions.STATUS:
+        return revpi.with_wlan and "ant2" in config_txt.get_values("dtparam")
+
+    else:
+        raise ValueError(f"action {action} not supported")
+
+    return None
+
+
+def configure_gui(action: ConfigActions):
+    gui_available = access("/usr/bin/startx", X_OK)
+
+    if action is ConfigActions.AVAILABLE:
+        return gui_available
+
+    bus = SystemBus()
+    systemd = bus.get(
+        "org.freedesktop.systemd1",
+        "/org/freedesktop/systemd1",
+    )
+    systemd_manager = systemd["org.freedesktop.systemd1.Manager"]
+
+    if action is ConfigActions.ENABLE:
+        systemd_manager.SetDefaultTarget("graphical.target", True)
+
+    elif action is ConfigActions.DISABLE:
+        systemd_manager.SetDefaultTarget("multi-user.target", True)
+
+    elif action is ConfigActions.STATUS:
+        return systemd_manager.GetDefaultTarget() == "graphical.target"
+
+    else:
+        raise ValueError(f"action {action} not supported")
+
+
+def configure_wlan(action: ConfigActions):
+    revpi = RevPiConfig()
+
+    if action is ConfigActions.ENABLE:
+        if revpi.with_wlan:
+            wlan_rfkill_index = get_rfkill_index(revpi.class_path_wlan)
+            with open(f"/sys/class/rfkill/rfkill{wlan_rfkill_index}/soft", "w") as f:
+                f.write("0")
+
+    elif action is ConfigActions.DISABLE:
+        if revpi.with_wlan:
+            wlan_rfkill_index = get_rfkill_index(revpi.class_path_wlan)
+            with open(f"/sys/class/rfkill/rfkill{wlan_rfkill_index}/soft", "w") as f:
+                f.write("1")
+
+    elif action is ConfigActions.AVAILABLE:
+        return revpi.with_wlan
+
+    elif action is ConfigActions.STATUS:
+        if not revpi.with_wlan:
+            return False
+
+        wlan_rfkill_index = get_rfkill_index(revpi.class_path_wlan)
+        with open(f"/sys/class/rfkill/rfkill{wlan_rfkill_index}/soft", "r") as f:
+            buffer = f.read().strip()
+            return buffer == "0"
+
+    else:
+        raise ValueError(f"action {action} not supported")
+
+    return None
+
+
+def get_rfkill_index(device_class_path: str) -> Optional[int]:
+    """
+    Get the rfkill index for a device under a specific device class path.
+
+    This function searches for and extracts the rfkill index associated with
+    devices located under the given device class path. It uses a regular
+    expression to identify and parse the rfkill index from the paths
+    of matching rfkill device files.
+
+    Parameters:
+        device_class_path: str
+            The path to the device class directory where rfkill entries
+            are located.
+
+    Returns:
+        Optional[int]:
+            The index of the rfkill device if found, otherwise None.
+    """
+    re_rfkill_index = re.compile(r"^/.+/rfkill(?P<index>\d+)$")
+    for rfkill_path in glob(join(device_class_path, "rfkill*")):
+        match_index = re_rfkill_index.match(rfkill_path)
+        if match_index:
+            return int(match_index.group("index"))
+
+    return None
+
+
+def simple_systemd(action: ConfigActions, unit: str):
+    """
+    Performs specified actions on systemd units.
+
+    This function allows interaction with systemd units for various operations
+    such as enabling, disabling, checking the status, and verifying availability.
+    It communicates with the systemd manager via the SystemBus and handles units
+    based on the action specified.
+
+    Parameters:
+        action (ConfigActions): Specifies the action to be performed on the
+                                systemd unit. Supported actions include ENABLE,
+                                DISABLE, STATUS, and AVAILABLE.
+        unit (str): The name of the systemd unit on which the action is to be
+                    performed.
+
+    Returns:
+        bool: For STATUS and AVAILABLE actions, returns True if the corresponding
+              criteria are met (e.g., enabled and active for STATUS, or not found
+              for AVAILABLE). Otherwise, returns False.
+
+    Raises:
+        ValueError: If the specified action is not supported.
+    """
+    bus = SystemBus()
+    systemd = bus.get(
+        "org.freedesktop.systemd1",
+        "/org/freedesktop/systemd1",
+    )
+    systemd_manager = systemd["org.freedesktop.systemd1.Manager"]
+
+    if action is ConfigActions.ENABLE:
+        systemd_manager.UnmaskUnitFiles([unit], False)
+        systemd_manager.EnableUnitFiles([unit], False, False)
+        systemd_manager.StartUnit(unit, "replace")
+
+    elif action is ConfigActions.DISABLE:
+        systemd_manager.StopUnit(unit, "replace")
+        systemd_manager.DisableUnitFiles([unit], False)
+
+    elif action is ConfigActions.STATUS:
+        try:
+            unit_path = systemd_manager.LoadUnit(unit)
+            properties = bus.get("org.freedesktop.systemd1", unit_path)
+        except Exception:
+            log.warning(f"could not get systemd unit {unit}")
+            return False
+
+        return properties.UnitFileState == "enabled" and properties.ActiveState == "active"
+
+    elif action is ConfigActions.AVAILABLE:
+        try:
+            unit_path = systemd_manager.LoadUnit(unit)
+            properties = bus.get("org.freedesktop.systemd1", unit_path)
+        except Exception:
+            log.warning(f"could not get systemd unit {unit}")
+            return False
+
+        return properties.LoadState != "not-found"
+
+    else:
+        raise ValueError(f"action {action} not supported")
+
+
+if __name__ == "__main__":
+    rc = RevPiConfig()
+    print("Model:", rc.model)
+    print("Serial:         ", rc.serial)
+    print("CM Type:        ", rc.cm_type.name)
+    print("With WLAN:      ", rc.with_wlan)
+    if rc.with_wlan:
+        print("    class path: ", rc.class_path_wlan)
+        print("  rfkill index: ", get_rfkill_index(rc.class_path_wlan))
+    print("With con-bridge:", rc.with_con_bridge)
+
+    config_txt = ConfigTxt()
+    print("Config file:    ", config_txt.config_txt_path)

tests/dbus_middleware1/process_image/test_interface_picontrol.py

@@ -18,7 +18,7 @@ class TestObjectPicontrol(TestBusProvider):
     def test_reset_driver(self):
         simple_call(
             "ResetDriver",
-            interface=extend_interface("picontrol"),
+            interface=extend_interface("PiControl"),
             bus_type=BusType.SESSION,
         )
         ioctl_call = IOCTL_QUEUE.get(timeout=2.0)
@@ -37,7 +37,7 @@ class TestObjectPicontrol(TestBusProvider):
         result = await_signal(
             "NotifyDriverReset",
             timeout,
-            extend_interface("picontrol"),
+            extend_interface("PiControl"),
             bus_type=BusType.SESSION,
         )
         self.assertTrue(result)