GLIB D-BUS蓝牙-如何获取文件描述符？

#include <glib.h>
#include <gio/gio.h>
#include <stdio.h>

int main(int argc, char *argv[]) {
    GError *error = NULL;
    GDBusConnection *connection;

    // 获取 D-Bus 连接
    connection = g_bus_get_sync(G_BUS_TYPE_SYSTEM, NULL, &error);
    if (error != NULL) {
        g_printerr("Error getting D-Bus connection: %s\n", error->message);
        g_error_free(error);
        return 1;
    }

    // 获取文件描述符
    GSocket *socket = g_socket_new(G_SOCKET_FAMILY_UNIX, G_SOCKET_TYPE_STREAM, G_SOCKET_PROTOCOL_DEFAULT, NULL);
    if (socket == NULL) {
        g_printerr("Error creating socket\n");
        return 1;
    }

    // 这里假设您已经连接了 socket
    // 例如，您可以使用 g_socket_connect() 连接到某个地址

    // 获取文件描述符
    int fd = g_socket_get_fd(socket);
    if (fd < 0) {
        g_printerr("Error getting file descriptor\n");
        return 1;
    }

    printf("File descriptor: %d\n", fd);

    // 清理
    g_object_unref(socket);
    g_object_unref(connection);

    return 0;
}