### Install Example Scripts

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Installs the specified example scripts to the documentation directory.

```cmake
install(FILES ${EXAMPLES_SCRIPTS} DESTINATION ${CMAKE_INSTALL_DATADIR}/doc/dbus/examples)
```

--------------------------------

### Define Example Scripts

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Lists the example scripts to be installed.

```cmake
set(EXAMPLES_SCRIPTS
    GetAllMatchRules.py
)
```

--------------------------------

### Basic KApplication Setup

Source: https://github.com/dbus/dbus/blob/main/doc/dcop-howto.txt

Minimal boilerplate for a KDE application used for performance testing.

```cpp
#include <kapplication.h>

int main(int argc, char **argv)
{
  KApplication *app;

  app = new KApplication(argc, argv, "testit");
  return app->exec();
}
```

--------------------------------

### Install DBus Library and Headers

Source: https://github.com/dbus/dbus/blob/main/dbus/CMakeLists.txt

Installs the 'dbus-1' target, along with its public and architecture-specific headers, to the appropriate installation directories.

```cmake
install(TARGETS dbus-1 ${INSTALL_TARGETS_DEFAULT_ARGS})
install(FILES ${dbusinclude_HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/dbus-1.0/dbus)
install(FILES ${dbusinclude_ARCH_HEADERS} DESTINATION ${CMAKE_INSTALL_LIBDIR}/dbus-1.0/include/dbus)
```

--------------------------------

### Create dbus-launch Executable

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Creates the dbus-launch executable, links it with DBUS_LIBRARIES and optionally X11_LIBRARIES, and installs it by default.

```cmake
add_executable(dbus-launch ${dbus_launch_SOURCES})
target_link_libraries(dbus-launch ${DBUS_LIBRARIES})
if(DBUS_BUILD_X11)
    target_link_libraries(dbus-launch ${X11_LIBRARIES} )
endif()
install(TARGETS dbus-launch ${INSTALL_TARGETS_DEFAULT_ARGS})
```

--------------------------------

### Enable DBus service installer (Windows)

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Configures an option for enabling the DBus service installer on Windows. Defaults to OFF. This support is not complete.

```cmake
if(WIN32)
    # win32 dbus service support - this support is not complete
    option(DBUS_SERVICE "enable dbus service installer" OFF)
endif()
```

--------------------------------

### Launch Service by Calling a Method

Source: https://github.com/dbus/dbus/blob/main/doc/system-activation.txt

Example of launching a service and executing a method on it using `dbus-send`. The service activation is transparent to the caller.

```bash
dbus-send --system --print-reply\	--dest=org.freedesktop.Hal\	/org/freedesktop/Hal/Manager\	org.freedesktop.Hal.Manager.DeviceExists\	string:/org/freedesktop/Hal/devices/computer
```

--------------------------------

### Create dbus-monitor Executable

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Creates the dbus-monitor executable and links it with DBUS_LIBRARIES. It is also installed by default.

```cmake
add_executable(dbus-monitor ${dbus_monitor_SOURCES})
target_link_libraries(dbus-monitor ${DBUS_LIBRARIES})
install(TARGETS dbus-monitor ${INSTALL_TARGETS_DEFAULT_ARGS})
```

--------------------------------

### Create dbus-update-activation-environment Executable

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Creates the dbus-update-activation-environment executable and links it with DBUS_LIBRARIES. It is also installed by default.

```cmake
add_executable(dbus-update-activation-environment ${dbus_update_activation_environment_SOURCES})
target_link_libraries(dbus-update-activation-environment ${DBUS_LIBRARIES})
install(TARGETS dbus-update-activation-environment ${INSTALL_TARGETS_DEFAULT_ARGS})
```

--------------------------------

### Example D-BUS Service File

Source: https://github.com/dbus/dbus/blob/main/doc/system-activation.txt

A typical service file for D-BUS activation. It specifies the service name, the executable path, and the user to run the service as.

```ini
[D-BUS Service]
Name=org.me.test
Exec=/usr/sbin/dbus-test-server.py
User=ftp
```

--------------------------------

### Install Directory for dbus-uuidgen

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Installs the /var/lib/dbus directory, which is used by dbus-uuidgen.

```cmake
install(DIRECTORY DESTINATION ${CMAKE_INSTALL_FULL_LOCALSTATEDIR}/lib/dbus)
```

--------------------------------

### Create dbus-test-tool Executable

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Creates the dbus-test-tool executable and links it with DBUS_LIBRARIES. It is also installed by default.

```cmake
add_executable(dbus-test-tool ${dbus_test_tool_SOURCES})
target_link_libraries(dbus-test-tool ${DBUS_LIBRARIES})
install(TARGETS dbus-test-tool ${INSTALL_TARGETS_DEFAULT_ARGS})
```

--------------------------------

### Activate Service Without Calling a Method

Source: https://github.com/dbus/dbus/blob/main/doc/system-activation.txt

Example of activating a service using the `StartServiceByName` D-BUS method without calling a specific method on the service.

```bash
dbus-send --system --print-reply\	--dest=org.freedesktop.DBus\	/org/freedesktop/DBus\	org.freedesktop.DBus.StartServiceByName\	string:org.freedesktop.Hal uint32:0
```

--------------------------------

### Create dbus-send Executable

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Creates the dbus-send executable and links it with DBUS_LIBRARIES. It is also installed by default.

```cmake
add_executable(dbus-send ${dbus_send_SOURCES})
target_link_libraries(dbus-send ${DBUS_LIBRARIES})
install(TARGETS dbus-send ${INSTALL_TARGETS_DEFAULT_ARGS})
```

--------------------------------

### Create dbus-run-session Executable

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Creates the dbus-run-session executable and links it with DBUS_INTERNAL_LIBRARIES. It is also installed by default.

```cmake
add_executable(dbus-run-session ${dbus_run_session_SOURCES})
target_link_libraries(dbus-run-session ${DBUS_INTERNAL_LIBRARIES})
install(TARGETS dbus-run-session ${INSTALL_TARGETS_DEFAULT_ARGS})
```

--------------------------------

### Create dbus-cleanup-sockets Executable (Non-Windows)

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Creates the dbus-cleanup-sockets executable and links it with DBUS_LIBRARIES, intended for non-Windows systems. It is also installed by default.

```cmake
if(NOT WIN32)
    add_executable(dbus-cleanup-sockets ${dbus_cleanup_sockets_SOURCES})
    target_link_libraries(dbus-cleanup-sockets ${DBUS_LIBRARIES})
    install(TARGETS dbus-cleanup-sockets ${INSTALL_TARGETS_DEFAULT_ARGS})
endif()
```

--------------------------------

### Execute Inter-user DCOP Command

Source: https://github.com/dbus/dbus/blob/main/doc/dcop-howto.txt

Example command to run a process as root while connecting to a user's DCOP server.

```bash
ICEAUTHORITY=~user/.ICEauthority kdesu root -c kcmroot -dcopserver `cat ~user/.DCOPserver`
```

--------------------------------

### Define DCOP Interface Header

Source: https://github.com/dbus/dbus/blob/main/doc/dcop-howto.txt

Example of a header file structure for use with the dcopidl compiler.

```cpp
#ifndef MY_INTERFACE_H
#define MY_INTERFACE_H
```

--------------------------------

### Configure HTML Index File

Source: https://github.com/dbus/dbus/blob/main/doc/CMakeLists.txt

This snippet configures an index.html file from a template, potentially including a link to API documentation if Doxygen docs are enabled. The generated file is installed.

```cmake
if(DBUS_ENABLE_DOXYGEN_DOCS)
    set(DBUS_APIDOC_LINK "<a href=\"api/html/index.html\">libdbus API Documentation</a>")
else()
    set(DBUS_APIDOC_LINK "")
endif()
configure_file(index.html.in ${CMAKE_CURRENT_BINARY_DIR}/index.html)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/index.html DESTINATION ${CMAKE_INSTALL_DATADIR}/doc/dbus)
```

--------------------------------

### Create dbus-uuidgen Executable (Non-Windows)

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Creates the dbus-uuidgen executable and links it with DBUS_LIBRARIES, intended for non-Windows systems. It is also installed by default.

```cmake
if(NOT WIN32)
    add_executable(dbus-uuidgen ${dbus_uuidgen_SOURCES})
    target_link_libraries(dbus-uuidgen ${DBUS_LIBRARIES})
    install(TARGETS dbus-uuidgen ${INSTALL_TARGETS_DEFAULT_ARGS})
endif()
```

--------------------------------

### Enable X11 autolaunch support

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Configures an option to build with X11 autolaunch support if X11 is found. Defaults to ON.

```cmake
if(X11_FOUND)
    option(DBUS_BUILD_X11 "Build with X11 autolaunch support " ON)
endif()
```

--------------------------------

### Upload documentation

Source: https://github.com/dbus/dbus/blob/main/maint/release-checklist.md

Updates the online documentation using the build directory.

```bash
ninja -C ${builddir} maintainer-upload-docs
```

--------------------------------

### Create and Manage a D-Bus Server in C

Source: https://context7.com/dbus/dbus/llms.txt

Initializes a server on a Unix socket, registers a connection callback, and processes messages in a loop.

```c
#include <dbus/dbus.h>
#include <stdio.h>
#include <unistd.h>

static DBusConnection *client_conn = NULL;

/* Called when client sends a message */
DBusHandlerResult message_handler(DBusConnection *conn,
                                  DBusMessage *msg,
                                  void *user_data)
{
    printf("Received message: interface=%s, member=%s\n",
           dbus_message_get_interface(msg),
           dbus_message_get_member(msg));

    /* Handle method calls */
    if (dbus_message_get_type(msg) == DBUS_MESSAGE_TYPE_METHOD_CALL) {
        if (dbus_message_is_method_call(msg, "org.example.Server", "Echo")) {
            DBusMessage *reply;
            DBusMessageIter iter;
            const char *input = NULL;

            /* Get input argument */
            if (dbus_message_iter_init(msg, &iter) &&
                dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_STRING) {
                dbus_message_iter_get_basic(&iter, &input);
            }

            /* Create reply */
            reply = dbus_message_new_method_return(msg);
            if (reply) {
                char response[256];
                snprintf(response, sizeof(response), "Echo: %s", input ? input : "");
                const char *resp_ptr = response;

                dbus_message_append_args(reply,
                    DBUS_TYPE_STRING, &resp_ptr,
                    DBUS_TYPE_INVALID);

                dbus_connection_send(conn, reply, NULL);
                dbus_message_unref(reply);
            }

            return DBUS_HANDLER_RESULT_HANDLED;
        }
    }

    return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}

/* Called when a new client connects */
void new_connection_callback(DBusServer *server,
                            DBusConnection *new_conn,
                            void *data)
{
    printf("New client connected!\n");

    /* Reference and store the connection */
    dbus_connection_ref(new_conn);
    client_conn = new_conn;

    /* Set up message handling */
    dbus_connection_add_filter(new_conn, message_handler, NULL, NULL);

    /* Allow anonymous connections */
    dbus_connection_set_allow_anonymous(new_conn, TRUE);
}

int main(void)
{
    DBusError error;
    DBusServer *server;
    char *address;

    dbus_error_init(&error);

    /* Create server listening on a Unix socket */
    server = dbus_server_listen("unix:path=/tmp/dbus-example-server", &error);

    if (dbus_error_is_set(&error)) {
        fprintf(stderr, "Server creation failed: %s\n", error.message);
        dbus_error_free(&error);
        return 1;
    }

    if (server == NULL) {
        fprintf(stderr, "Server is NULL\n");
        return 1;
    }

    /* Get the actual address the server is listening on */
    address = dbus_server_get_address(server);
    printf("Server listening on: %s\n", address);
    dbus_free(address);

    /* Set callback for new connections */
    dbus_server_set_new_connection_function(server,
                                            new_connection_callback,
                                            NULL, NULL);

    printf("Server running... (Ctrl+C to exit)\n");

    /* Simple event loop */
    while (dbus_server_get_is_connected(server)) {
        /* Process client connection if we have one */
        if (client_conn && dbus_connection_get_is_connected(client_conn)) {
            dbus_connection_read_write_dispatch(client_conn, 100);
        } else {
            usleep(100000);  /* 100ms */
        }
    }

    /* Cleanup */
    if (client_conn) {
        dbus_connection_unref(client_conn);
    }
    dbus_server_disconnect(server);
    dbus_server_unref(server);

    return 0;
}
```

--------------------------------

### Configure D-Bus Test Utilities Build

Source: https://github.com/dbus/dbus/blob/main/test/CMakeLists.txt

Sets up the static library for test utilities and defines source files for various test executables.

```cmake
add_definitions(${DBUS_INTERNAL_CLIENT_DEFINITIONS})

include_directories(.)

set(DBUS_SESSION_BUS_LISTEN_ADDRESS ${TEST_LISTEN})

add_library(dbus-testutils STATIC
    disable-crash-handling.c
    disable-crash-handling.h
    test-utils.h
    test-utils.c
)
target_link_libraries(dbus-testutils ${DBUS_INTERNAL_LIBRARIES})

if(DBUS_ENABLE_INTRUSIVE_TESTS)
    add_subdirectory( name-test )
endif()

set(manual-dir-iter_SOURCES
    manual-dir-iter.c
)

set(test-service_SOURCES
    test-service.c
)

set(test-names_SOURCES
    test-names.c
)

set(break_loader_SOURCES
    break-loader.c
)

set(test-shell-service_SOURCES
    test-shell-service.c
)

set(test-shell_SOURCES
    shell-test.c
)

set(test-atomic_SOURCES
    internals/atomic.c
)

set(test-spawn_SOURCES
    spawn-test.c
)

set(test-exit_SOURCES
    test-exit.c
)

# We have to compile a separate copy of disable-crash-handling.c for
# test-segfault rather than using the libdbus-testutils library, because
# otherwise it would fail to link when using the AddressSanitizer.
set(test-segfault_SOURCES
    disable-crash-handling.c
    disable-crash-handling.h
    test-segfault.c
)

set(test-sleep-forever_SOURCES
    test-sleep-forever.c
)

set(manual-tcp_SOURCES
    manual-tcp.c
)

set(manual-paths_SOURCES
    manual-paths.c
)

add_helper_executable(manual-dir-iter ${manual-dir-iter_SOURCES} ${DBUS_INTERNAL_LIBRARIES})
add_helper_executable(test-service ${test-service_SOURCES} dbus-testutils)
add_helper_executable(test-names ${test-names_SOURCES} dbus-testutils)
add_test_executable(test-shell ${test-shell_SOURCES} ${DBUS_INTERNAL_LIBRARIES})
add_test_executable(test-string internals/strings.c dbus-testutils)
add_test_executable(test-printf internals/printf.c dbus-testutils)
add_helper_executable(test-privserver test-privserver.c dbus-testutils)
add_helper_executable(test-shell-service ${test-shell-service_SOURCES} dbus-testutils)
if(NOT WINCE AND ENABLE_TRADITIONAL_ACTIVATION)
    add_test_executable(test-spawn-oom internals/spawn-oom.c dbus-testutils)
endif()
if(ENABLE_TRADITIONAL_ACTIVATION)
    add_helper_executable(test-spawn ${test-spawn_SOURCES} ${DBUS_INTERNAL_LIBRARIES})
endif()
add_helper_executable(test-exit ${test-exit_SOURCES} ${DBUS_INTERNAL_LIBRARIES})
# the second argument of add_helper_executable() is a whitespace-separated
# list of source files and the third and subsequent arguments are libraries
```

--------------------------------

### Enable kqueue support (BSD)

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Builds with kqueue support for BSD systems. Requires sys/event.h. Defaults to ON.

```cmake
elseif("${CMAKE_SYSTEM_NAME}" MATCHES ".*BSD")
    option(DBUS_BUS_ENABLE_KQUEUE "build with kqueue support (FreeBSD only)" ON)
    if(DBUS_BUS_ENABLE_KQUEUE)
        if(NOT HAVE_SYS_EVENT_H)
            message(FATAL_ERROR "sys/event.h not found!")
        endif()
    endif()
endif()
```

--------------------------------

### dbus_message_new_method_call

Source: https://context7.com/dbus/dbus/llms.txt

Creates a new D-Bus message to invoke a method on a remote object. Includes an example of appending arguments and handling the reply.

```APIDOC
## POST /api/method_call

### Description
Creates a new D-Bus message to invoke a method on a remote object.

### Method
POST

### Endpoint
/api/method_call

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
- **bus_name** (string) - Required - The D-Bus bus name of the destination service.
- **object_path** (string) - Required - The object path on the destination service.
- **interface** (string) - Required - The interface containing the method.
- **method_name** (string) - Required - The name of the method to call.
- **arguments** (array) - Optional - An array of arguments to pass to the method.

### Request Example
```json
{
  "bus_name": "org.example.Service",
  "object_path": "/org/example/Object",
  "interface": "org.example.Interface",
  "method_name": "Echo",
  "arguments": [{"type": "string", "value": "Hello, D-Bus!"}]
}
```

### Response
#### Success Response (200)
- **reply** (string) - The reply from the method call.

#### Response Example
```json
{
  "reply": "Hello, D-Bus!"
}
```
```

--------------------------------

### Compile Performance Test

Source: https://github.com/dbus/dbus/blob/main/doc/dcop-howto.txt

Command to compile the test application with KDE and Qt libraries.

```bash
g++ -O2 -o testit testit.cpp -I$QTDIR/include -L$QTDIR/lib -lkdecore
```

--------------------------------

### Define Build Output Directories

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Configures output paths for binaries, libraries, and archives based on the operating system.

```cmake
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
if(WIN32 OR CYGWIN)
    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
else()
    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
endif()
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)

# for including config.h and for includes like <dir/foo.h>
include_directories(. ${PROJECT_BINARY_DIR} ${CMAKE_INCLUDE_PATH})
```

--------------------------------

### Generate Configuration Files

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Generates the config.h file and platform-specific environment scripts.

```cmake
configure_file(cmake/config.h.cmake ${PROJECT_BINARY_DIR}/config.h)

if(WIN32)
configure_file(cmake/dbus-env.bat.cmake ${PROJECT_BINARY_DIR}/bin/dbus-env.bat)
    install(FILES ${PROJECT_BINARY_DIR}/bin/dbus-env.bat DESTINATION ${CMAKE_INSTALL_BINDIR})
endif()
```

--------------------------------

### Configure Platform-Specific Bus Settings

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Sets bus addresses, configuration files, and user credentials based on the target operating system.

```cmake
if(WIN32)
    set(DBUS_SESSION_BUS_LISTEN_ADDRESS "autolaunch:" CACHE STRING "session bus default listening address")
    set(DBUS_SESSION_BUS_CONNECT_ADDRESS "autolaunch:" CACHE STRING "session bus fallback address for clients")

    set(DBUS_SYSTEM_CONFIG_FILE "share/dbus-1/system.conf")
    set(DBUS_SESSION_CONFIG_FILE "share/dbus-1/session.conf")
  # bus-test expects a non empty string
    set(DBUS_USER "Administrator")
    set(DBUS_TEST_USER "guest")
    set(DBUS_SESSION_CONF_MAYBE_AUTH_EXTERNAL "<!--<auth>EXTERNAL</auth>-->")
else(WIN32)
    set(DBUS_SESSION_BUS_LISTEN_ADDRESS "unix:tmpdir=${DBUS_SESSION_SOCKET_DIR}" CACHE STRING "session bus default listening address")
    set(DBUS_SESSION_BUS_CONNECT_ADDRESS "autolaunch:" CACHE STRING "session bus fallback address for clients")
    set(DBUS_SYSTEM_CONFIG_FILE  ${DBUS_DATADIR}/dbus-1/system.conf)
    set(DBUS_SESSION_CONFIG_FILE ${DBUS_DATADIR}/dbus-1/session.conf)
    set(DBUS_USER "messagebus")
    set(DBUS_TEST_USER "nobody")
  # For best security, assume that all non-Windows platforms can do
  # credentials-passing.
    set(DBUS_SESSION_CONF_MAYBE_AUTH_EXTERNAL "<auth>EXTERNAL</auth>")
endif()
```

--------------------------------

### Visual Studio build configuration messages

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Provides specific build configuration messages for Visual Studio, guiding users on test program execution based on the build type (Debug/Release).

```cmake
if(MSVC_IDE)
    if(CMAKE_BUILD_TYPE MATCHES Debug)
        set(IDE_BIN /Debug )
        message(STATUS)
        message(STATUS "Visual Studio: test programs will only work with 'Debug' configuration!")
        message(STATUS "To run tests with 'Release' configuration use -DCMAKE_BUILD_TYPE=Release")
        message(STATUS "Add '..\\..\\test\\data' to the command line option of the test programs")
        message(STATUS)
    else(CMAKE_BUILD_TYPE MATCHES Debug)
        set(IDE_BIN /Release)
        message(STATUS)
        message(STATUS "Visual Studio: test programs will only work with 'Release' configuration!")
        message(STATUS "To run tests with 'Debug' configuration use -DCMAKE_BUILD_TYPE=Debug")
        message(STATUS "Add '..\\..\\test\\data' to the command line option of the test programs")
        message(STATUS)
    endif()
    set(TEST_PATH_FORCE FORCE)
    file(REMOVE ${PROJECT_BINARY_DIR}/data/dbus-1/services)
endif()
```

--------------------------------

### Find System Libraries

Source: https://github.com/dbus/dbus/blob/main/dbus/CMakeLists.txt

Locates necessary system libraries such as 'rt' for clock functions on Linux and 'socket' for socket functions on QNX.

```cmake
# for clock_getres() on e.g. GNU/Linux (but not Android)
find_library(LIBRT rt)

# for socket() on QNX
find_library(LIBSOCKET socket)
```

--------------------------------

### Add Privserver and Thread Init Tests with Traditional Activation

Source: https://github.com/dbus/dbus/blob/main/test/name-test/CMakeLists.txt

Conditionally defines test executables for the private server client and thread initialization when traditional activation is enabled. These link against DBus test utilities and internal libraries respectively.

```cmake
add_session_test_executable(test-privserver-client test-privserver-client.c dbus-testutils)
```

```cmake
add_session_test_executable(test-thread-init test-threads-init.c ${DBUS_INTERNAL_LIBRARIES})
```

--------------------------------

### Set linker and include directories

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Configures directories for linking libraries and including header files. Uses CMake variables for dynamic path resolution.

```cmake
link_directories(${DBUS_LIB_DIR} ${CMAKE_LIBRARY_OUTPUT_DIRECTORY} )
include_directories( ${CMAKE_LIBRARY_PATH}  )
```

--------------------------------

### Main Function with Custom Error Test

Source: https://context7.com/dbus/dbus/llms.txt

The main function initializes a DBusError using the static initializer and demonstrates setting and checking a custom error before calling the main error handling demonstration function.

```c
int main(void)
{
    DBusError error = DBUS_ERROR_INIT;

    /* Test custom error */
    set_custom_error(&error, "invalid configuration");

    if (dbus_error_is_set(&error)) {
        printf("Custom error: %s - %s\n", error.name, error.message);
        dbus_error_free(&error);
    }

    demonstrate_error_handling();

    return 0;
}

```

--------------------------------

### Set dbus-update-activation-environment Source Files

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Specifies the source files for the dbus-update-activation-environment executable.

```cmake
set(dbus_update_activation_environment_SOURCES
    dbus-update-activation-environment.c
    tool-common.c
    tool-common.h
)
```

--------------------------------

### Enable inotify support (Linux)

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Builds with inotify support for Linux systems. Requires sys/inotify.h. Defaults to ON.

```cmake
if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
    option(DBUS_BUS_ENABLE_INOTIFY "build with inotify support (linux only)" ON)
    if(DBUS_BUS_ENABLE_INOTIFY)
        if(NOT HAVE_SYS_INOTIFY_H)
            message(FATAL_ERROR "sys/inotify.h not found!")
        endif()
    endif()
endif()
```

--------------------------------

### Enable Testing

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Enables the testing framework for the project.

```cmake
enable_testing()
```

--------------------------------

### Manage stable branches

Source: https://github.com/dbus/dbus/blob/main/maint/release-checklist.md

Commands for creating, pushing, and checking out stable release branches.

```bash
git branch dbus-X.Y
```

```bash
git push origin dbus-X.Y
```

```bash
git checkout dbus-X.Y
```

--------------------------------

### Configure Windows CE Build

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Checks for Windows CE platform and displays build information.

```cmake
if(WINCE)

message("Building for WinCE (${CMAKE_SYSTEM_VERSION})")

endif()
```

--------------------------------

### Interface Definitions and Compile Options

Source: https://github.com/dbus/dbus/blob/main/dbus/CMakeLists.txt

Sets interface include directories and compile definitions for the 'dbus-1' target, making them available to consumers.

```cmake
# target definitions passed to the clients
target_include_directories(dbus-1 INTERFACE $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/dbus-1.0>;$<INSTALL_INTERFACE:${CMAKE_INSTALL_LIBDIR}/dbus-1.0/include>)
target_compile_definitions(dbus-1 INTERFACE "")
```

--------------------------------

### Add X11 Support to dbus-launch

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Conditionally adds dbus-launch-x11.c to the source files and includes X11 directories if DBUS_BUILD_X11 is enabled.

```cmake
if(DBUS_BUILD_X11)
set(dbus_launch_SOURCES
     ${dbus_launch_SOURCES}
     dbus-launch-x11.c
)
include_directories(${X11_INCLUDE_DIR})
endif()
```

--------------------------------

### Add Version Info for dbus-launch (Windows)

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Adds version information to the dbus-launch executable specifically for Windows builds.

```cmake
if(WIN32)
    add_executable_version_info(dbus_launch_SOURCES "dbus-launch")
endif()
```

--------------------------------

### Add Version Info for dbus-update-activation-environment (Windows)

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Adds version information to the dbus-update-activation-environment executable specifically for Windows builds.

```cmake
if(WIN32)
    add_executable_version_info(dbus_update_activation_environment_SOURCES "dbus-update-activation-environment")
endif()
```

--------------------------------

### Platform-Specific Settings for DBus

Source: https://github.com/dbus/dbus/blob/main/dbus/CMakeLists.txt

Configures source and header files based on the operating system (Windows/Unix). Includes conditional settings for WINCE and ENABLE_TRADITIONAL_ACTIVATION.

```cmake
if(WIN32)
    set(DBUS_SHARED_SOURCES ${DBUS_SHARED_SOURCES}
        dbus-backtrace-win.c
        dbus-file-win.c
        dbus-init-win.cpp
        dbus-sysdeps-win.c
        dbus-pipe-win.c
        dbus-sysdeps-thread-win.c
    )
    set(DBUS_SHARED_HEADERS ${DBUS_SHARED_HEADERS}
        dbus-init-win.h
        dbus-sockets-win.h
        dbus-sysdeps-win.h
    )
    set(DBUS_UTIL_SOURCES ${DBUS_UTIL_SOURCES}
        dbus-spawn-win.c
        dbus-sysdeps-util-win.c
    )
    if(WINCE)
    set(DBUS_SHARED_SOURCES ${DBUS_SHARED_SOURCES}
        dbus-sysdeps-wince-glue.c
    )
    set(DBUS_SHARED_HEADERS ${DBUS_SHARED_HEADERS}
        dbus-sysdeps-wince-glue.h
    )
    endif()
else(WIN32)
    set(DBUS_SHARED_SOURCES ${DBUS_SHARED_SOURCES}
        dbus-file-unix.c
        dbus-pipe-unix.c
        dbus-sysdeps-unix.c
        dbus-sysdeps-pthread.c
        dbus-userdb.c
    )
    set(DBUS_SHARED_HEADERS ${DBUS_SHARED_HEADERS}
        dbus-transport-unix.h
        dbus-sysdeps-unix.h
        dbus-userdb.h
    )
    set(DBUS_UTIL_SOURCES ${DBUS_UTIL_SOURCES}
        dbus-userdb-util.c
        dbus-sysdeps-util-unix.c
    )
    if(ENABLE_TRADITIONAL_ACTIVATION)
        set(DBUS_UTIL_SOURCES ${DBUS_UTIL_SOURCES}
            dbus-spawn-unix.c
        )
    endif()
endif()

if(DBUS_HAVE_LINUX_EPOLL)
    set(DBUS_UTIL_SOURCES
        ${DBUS_UTIL_SOURCES}
        dbus-pollable-set-epoll.c
    )
endif()
```

--------------------------------

### Enable coverage profiling

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Configures the build with coverage profiling instrumentation using GCC flags. Defaults to OFF. Optimization flags are commented out.

```cmake
if(NOT MSVC)
    option(DBUS_GCOV_ENABLED "compile with coverage profiling instrumentation (gcc only)" OFF)
    if(DBUS_GCOV_ENABLED)
        add_definitions(-fprofile-arcs -ftest-coverage)
        # FIXME!!!!
        ## remove optimization
        # CFLAGS=`echo "$CFLAGS" | sed -e 's/-O[0-9]*//g'`
    endif()
endif()
```

--------------------------------

### Implement a DCOP Interface in a Class

Source: https://github.com/dbus/dbus/blob/main/doc/dcop-howto.txt

Inherit from the interface and implement the virtual methods. Ensure QObject is the first inherited class if applicable.

```cpp
class MyClass: public QObject, virtual public MyInterface
{
  Q_OBJECT
  
  public:
    MyClass(); 
    ~MyClass();

    ASYNC myAsynchronousMethod(QString someParameter);
    QRect mySynchronousMethod();
};
```

--------------------------------

### Initialize and Handle DBus Errors

Source: https://context7.com/dbus/dbus/llms.txt

Demonstrates initializing DBusError, checking for errors after operations like bus connection, printing error details, and handling specific error types. Errors must be initialized before use and freed after handling.

```c
#include <dbus/dbus.h>
#include <stdio.h>

void demonstrate_error_handling(void)
{
    DBusError error;
    DBusConnection *conn;
    DBusMessage *msg, *reply;

    /* Always initialize errors before use */
    dbus_error_init(&error);
    /* Or use static initializer: DBusError error = DBUS_ERROR_INIT; */

    /* Attempt a connection */
    conn = dbus_bus_get(DBUS_BUS_SESSION, &error);

    /* Check if error occurred */
    if (dbus_error_is_set(&error)) {
        /* Print error details */
        fprintf(stderr, "Error name: %s\n", error.name);
        fprintf(stderr, "Error message: %s\n", error.message);

        /* Check for specific error types */
        if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) {
            fprintf(stderr, "No D-Bus daemon running!\n");
        } else if (dbus_error_has_name(&error, DBUS_ERROR_NO_MEMORY)) {
            fprintf(stderr, "Out of memory!\n");
        }

        /* Free error resources */
        dbus_error_free(&error);
        return;
    }

    /* Create and send a message that will fail */
    msg = dbus_message_new_method_call(
        "org.nonexistent.Service",
        "/org/nonexistent/Object",
        "org.nonexistent.Interface",
        "NonexistentMethod"
    );

    /* Re-initialize error for reuse */
    dbus_error_init(&error);

    reply = dbus_connection_send_with_reply_and_block(conn, msg, 1000, &error);
    dbus_message_unref(msg);

    if (dbus_error_is_set(&error)) {
        /* Common error names from dbus-protocol.h:
         * DBUS_ERROR_SERVICE_UNKNOWN   - Service doesn't exist
         * DBUS_ERROR_NAME_HAS_NO_OWNER - Bus name not owned
         * DBUS_ERROR_NO_REPLY          - Timeout waiting for reply
         * DBUS_ERROR_ACCESS_DENIED     - Permission denied
         * DBUS_ERROR_UNKNOWN_METHOD    - Method doesn't exist
         * DBUS_ERROR_INVALID_ARGS      - Wrong argument types
         */

        if (dbus_error_has_name(&error, DBUS_ERROR_SERVICE_UNKNOWN)) {
            printf("Service not found on the bus\n");
        } else if (dbus_error_has_name(&error, DBUS_ERROR_NO_REPLY)) {
            printf("Service did not respond in time\n");
        } else {
            printf("Method call failed: %s\n", error.message);
        }

        dbus_error_free(&error);
    } else if (reply) {
        /* Check if reply is an error message */
        if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) {
            /* Extract error from message */
            dbus_set_error_from_message(&error, reply);
            printf("Remote error: %s - %s\n", error.name, error.message);
            dbus_error_free(&error);
        }
        dbus_message_unref(reply);
    }

    dbus_connection_unref(conn);
}

```

--------------------------------

### Set dbus-launch Source Files (Windows)

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Specifies the source files for the dbus-launch executable on Windows.

```cmake
if(WIN32)
set(dbus_launch_SOURCES
    dbus-launch-win.c
)
else(WIN32)
set(dbus_launch_SOURCES
    dbus-launch.c
    tool-common.c
    tool-common.h
)
endif()
```

--------------------------------

### Implement DCOP Interface Methods

Source: https://github.com/dbus/dbus/blob/main/doc/dcop-howto.txt

Standard method implementation for DCOP-exposed functions.

```cpp
void MyClass::myAsynchronousMethod(QString someParameter)
{
  qDebug("myAsyncMethod called with param `" + someParameter + "'");
}
```

--------------------------------

### Windows Specific Library Linking and Versioning

Source: https://github.com/dbus/dbus/blob/main/dbus/CMakeLists.txt

Handles library versioning, suffixing, and linking for Windows, including specific libraries like ws2, advapi32, etc. Also creates a non-versioned copy for legacy applications.

```cmake
if(WIN32)
    if(DEFINED DBUS_LIBRARY_REVISION)
        set_target_properties(dbus-1 PROPERTIES SUFFIX "-${DBUS_LIBRARY_MAJOR}${CMAKE_SHARED_LIBRARY_SUFFIX}")
        add_custom_command(TARGET dbus-1 POST_BUILD
            COMMAND ${CMAKE_COMMAND} -E copy "$<TARGET_FILE:dbus-1>" "$<TARGET_FILE_DIR:dbus-1>/${CMAKE_SHARED_LIBRARY_PREFIX}dbus-1${CMAKE_SHARED_LIBRARY_SUFFIX}"
            COMMENT "Create non versioned dbus-1 library for legacy applications"
        )
        install(FILES ${LEGACY_FILE_NAME} DESTINATION ${CMAKE_INSTALL_BINDIR})
    endif()
    if(WINCE)
        target_link_libraries(dbus-1 ws2)
    else(WINCE)
        target_link_libraries(dbus-1 ws2_32 advapi32 netapi32 iphlpapi dbghelp)
    endif()
endif()
```

--------------------------------

### Create release distribution

Source: https://github.com/dbus/dbus/blob/main/maint/release-checklist.md

Generates the distribution tarball equivalent to make distcheck.

```bash
meson dist -C ${builddir)
```

--------------------------------

### Emit and Connect DCOP Signals

Source: https://github.com/dbus/dbus/blob/main/doc/dcop-howto.txt

Demonstrates emitting a signal from a DCOP client and establishing a non-volatile, anonymous connection to receive it.

```cpp
   QByteArray params;
   QDataStream stream(params, IO_WriteOnly);
   stream << pid;
   kapp->dcopClient()->emitDCOPSignal("clientDied(pid_t)", params);
```

```cpp
   connectDCOPSignal(0, 0, "clientDied(pid_t)", "clientDied(pid_t)", false);
```

--------------------------------

### Add Version Info for dbus-send (Windows)

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Adds version information to the dbus-send executable specifically for Windows builds.

```cmake
if(WIN32)
    add_executable_version_info(dbus_send_SOURCES "dbus-send")
endif()
```

--------------------------------

### Add Version Info for dbus-run-session (Windows)

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Adds version information to the dbus-run-session executable specifically for Windows builds.

```cmake
if(WIN32)
    add_executable_version_info(dbus_run_session_SOURCES "dbus-run-session")
endif()
```

--------------------------------

### Set dbus-cleanup-sockets Source Files

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Specifies the source files for the dbus-cleanup-sockets executable.

```cmake
set(dbus_cleanup_sockets_SOURCES
    dbus-cleanup-sockets.c
)
```

--------------------------------

### Define Internal Client Definitions

Source: https://github.com/dbus/dbus/blob/main/test/name-test/CMakeLists.txt

Adds predefined macros for internal DBus client configurations. This is typically used at the beginning of a build script.

```cmake
add_definitions(${DBUS_INTERNAL_CLIENT_DEFINITIONS})
```

--------------------------------

### Add Compiler Definitions

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Adds necessary compiler flags for building D-Bus.

```cmake
add_definitions(-DHAVE_CONFIG_H)
add_definitions(${DBUS_BUS_CFLAGS})
```

--------------------------------

### Enable console owner file (Solaris)

Source: https://github.com/dbus/dbus/blob/main/CMakeLists.txt

Enables checking for a console owner file on Solaris systems. Defaults to ON.

```cmake
string(TOUPPER ${CMAKE_SYSTEM_NAME} sysname)
if("${sysname}" MATCHES ".*SOLARIS.*")
    option(HAVE_CONSOLE_OWNER_FILE "enable console owner file(solaris only)" ON)
    if(HAVE_CONSOLE_OWNER_FILE)
        set(DBUS_CONSOLE_OWNER_FILE "/dev/console" CACHE STRING "Directory to check for console ownerhip")
    endif()
endif()
```

--------------------------------

### Set dbus-run-session Source Files

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Specifies the source files for the dbus-run-session executable.

```cmake
set(dbus_run_session_SOURCES
    dbus-run-session.c
    tool-common.c
    tool-common.h
)
```

--------------------------------

### Registering a DCOP Client

Source: https://github.com/dbus/dbus/blob/main/doc/dcop-howto.txt

Registers the application with the DCOP server using the application name.

```cpp
/*
 * returns the appId that is actually registered, which _may_ be
 * different from what you passed
 */
appId = client->registerAs(kApp->name());
```

--------------------------------

### Add UAC Manifest for dbus-update-activation-environment (Windows)

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Adds a User Account Control (UAC) manifest to the dbus-update-activation-environment executable for Windows builds, excluding MSVC compiler.

```cmake
if(WIN32 AND NOT MSVC)
    add_uac_manifest(dbus_update_activation_environment_SOURCES)
endif()
```

--------------------------------

### Set dbus-monitor Source Files

Source: https://github.com/dbus/dbus/blob/main/tools/CMakeLists.txt

Specifies the source files for the dbus-monitor executable.

```cmake
set(dbus_monitor_SOURCES
    dbus-monitor.c
    dbus-print-message.c
    dbus-print-message.h
    tool-common.c
    tool-common.h
)
```

--------------------------------

### dbus_bus_get

Source: https://context7.com/dbus/dbus/llms.txt

Establishes a connection to a well-known system or session bus.

```APIDOC
## C dbus_bus_get

### Description
The dbus_bus_get() function establishes a connection to either the system bus or session bus. It returns a shared connection that should not be closed by the application, and automatically handles registration with the bus daemon.

### Parameters
#### Path Parameters
- **type** (DBusBusType) - Required - The bus type to connect to (DBUS_BUS_SESSION, DBUS_BUS_SYSTEM, or DBUS_BUS_STARTER).
- **error** (DBusError*) - Required - Pointer to an error structure to store connection errors.

### Response
#### Success Response (200)
- **connection** (DBusConnection*) - A pointer to the shared bus connection.
```

--------------------------------

### Tag release

Source: https://github.com/dbus/dbus/blob/main/maint/release-checklist.md

Creates an annotated tag for the release. Use -s for signed tags or -a for unsigned.

```bash
git tag -s -m 'Released X.Y.Z' dbus-X.Y.Z
```

```bash
git tag -a -m 'Released X.Y.Z' dbus-X.Y.Z
```

--------------------------------

### Perform Asynchronous Method Calls in C

Source: https://context7.com/dbus/dbus/llms.txt

Uses dbus_connection_send_with_reply to initiate a non-blocking request and a callback function to handle the response.

```c
#include <dbus/dbus.h>
#include <stdio.h>

/* Callback invoked when reply arrives */
void pending_call_notify(DBusPendingCall *pending, void *user_data)
{
    DBusMessage *reply;
    DBusError error;
    const char *result = NULL;

    printf("Reply received! (user_data: %s)\n", (char *)user_data);

    /* Get the reply message */
    reply = dbus_pending_call_steal_reply(pending);

    if (reply == NULL) {
        fprintf(stderr, "Reply is NULL\n");
        return;
    }

    dbus_error_init(&error);

    /* Check message type */
    if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) {
        dbus_set_error_from_message(&error, reply);
        fprintf(stderr, "Error reply: %s\n", error.message);
        dbus_error_free(&error);
    } else if (dbus_message_get_args(reply, &error,
                                     DBUS_TYPE_STRING, &result,
                                     DBUS_TYPE_INVALID)) {
        printf("Result: %s\n", result);
    } else {
        fprintf(stderr, "Failed to parse reply: %s\n", error.message);
        dbus_error_free(&error);
    }

    dbus_message_unref(reply);
}

int main(void)
{
    DBusError error;
    DBusConnection *conn;
    DBusMessage *msg;
    DBusPendingCall *pending = NULL;
    const char *param = "async test";

    dbus_error_init(&error);
    conn = dbus_bus_get(DBUS_BUS_SESSION, &error);

    if (dbus_error_is_set(&error)) {
        fprintf(stderr, "Connection Error: %s\n", error.message);
        dbus_error_free(&error);
        return 1;
    }

    /* Create method call message */
    msg = dbus_message_new_method_call(
        "org.freedesktop.DBus",
        "/org/freedesktop/DBus",
        "org.freedesktop.DBus",
        "GetNameOwner"
    );

    /* Add argument */
    dbus_message_append_args(msg,
        DBUS_TYPE_STRING, &param,
        DBUS_TYPE_INVALID);

    /* Send message and get pending call object
     * Timeout: DBUS_TIMEOUT_USE_DEFAULT or milliseconds */
    if (!dbus_connection_send_with_reply(conn, msg, &pending,
                                         DBUS_TIMEOUT_USE_DEFAULT)) {
        fprintf(stderr, "Send with reply failed\n");
        dbus_message_unref(msg);
        return 1;
    }

    dbus_message_unref(msg);

    if (pending == NULL) {
        fprintf(stderr, "Pending call is NULL\n");
        return 1;
    }

    /* Set up notification callback */
    if (!dbus_pending_call_set_notify(pending, pending_call_notify,
                                      "callback context", NULL)) {
        fprintf(stderr, "Failed to set notify\n");
        dbus_pending_call_unref(pending);
        return 1;
    }

    printf("Method call sent, waiting for reply...\n");

    /* Process messages until reply arrives */
    while (!dbus_pending_call_get_completed(pending)) {
        dbus_connection_read_write_dispatch(conn, 100);
    }

    /* Alternative: block waiting for reply */
    /* dbus_pending_call_block(pending); */

    /* Alternative: cancel pending call */
    /* dbus_pending_call_cancel(pending); */

    dbus_pending_call_unref(pending);
    dbus_connection_unref(conn);

    return 0;
}
```

--------------------------------

### Add Docbook Documentation

Source: https://github.com/dbus/dbus/blob/main/doc/CMakeLists.txt

This macro generates documentation from DocBook XML sources. It supports HTML and man page formats and can use templates for generated files. Ensure XSLTPROC_EXECUTABLE and DOCBOOKXSL_DIR are set.

```cmake
macro(add_docbook _target)
    set(options)
    set(oneValueArgs SOURCE TEMPLATE MAN_CATEGORY)
    set(multiValueArgs FORMATS)
    cmake_parse_arguments(ARGS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})

    foreach(_format ${ARGS_FORMATS})
        if(ARGS_TEMPLATE)
            set(_xmlfile "${CMAKE_CURRENT_BINARY_DIR}/${_target}-${_format}.xml")
            get_filename_component(_infile ${ARGS_TEMPLATE} ABSOLUTE)
            configure_file(${_infile} ${_xmlfile})
        else()
            get_filename_component(_infile ${ARGS_SOURCE} ABSOLUTE)
            set(_xmlfile ${_infile})
        endif()
        if(${_format} STREQUAL "man")
            set(_outname "${_target}.${ARGS_MAN_CATEGORY}")
            set(STYLESHEET "${DOCBOOKXSL_DIR}/manpages/docbook.xsl")
            set(INSTALL_DIR ${CMAKE_INSTALL_DATADIR}/man/man${ARGS_MAN_CATEGORY})
        else()
            if (NOT ARGS_MAN_CATEGORY)
                set(_outname "${_target}.html")
            else()
                set(_outname "${_target}.${ARGS_MAN_CATEGORY}.html")
            endif()
            set(STYLESHEET "${DOCBOOKXSL_DIR}/html/docbook.xsl")
            set(INSTALL_DIR ${CMAKE_INSTALL_DATADIR}/doc/dbus)
        endif()
        set(_outfile ${CMAKE_CURRENT_BINARY_DIR}/${_outname})
        add_custom_command(
            OUTPUT ${_outfile}
            COMMAND ${XSLTPROC_EXECUTABLE} --output ${_outfile} --nonet --xinclude  --param passivetex.extensions '1' --param generate.consistent.ids '1' ${STYLESHEET} ${_xmlfile}
            DEPENDS ${XSLTPROC_EXECUTABLE} ${_xmlfile}
            WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
        )
        add_custom_target(xmldoc-${_outname} DEPENDS ${_outfile})
        add_dependencies(xmldoc xmldoc-${_outname})
        install(FILES ${_outfile} DESTINATION ${INSTALL_DIR})
    endforeach()
endmacro()
```