38382770aa
- the first uses dbus-glib and D-Bus "NameOwnerChanged" signal directly - the second uses GIO's g_bus_watch_name() - the third uses Qt and QDBusServiceWatcher class
90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/* vim: set ft=c ts=4 sts=4 sw=4 expandtab smartindent: */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* (C) Copyright 2012 Red Hat, Inc.
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*/
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/*
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* This example monitors whether NM is running by checking if
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* "org.freedesktop.NetworkManager" is owned by a process on D-Bus.
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* It uses QDBusServiceWatcher class.
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*
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* Standalone compilation:
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* moc-qt4 monitor-nm-running.cpp -o monitor-nm-running.moc
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* g++ -Wall `pkg-config --libs --cflags QtCore QtDBus` monitor-nm-running.cpp -o monitor-nm-running
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*
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* You don't need to have NetworkManager devel package installed.
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*/
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#include <iostream>
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#include <QObject>
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#include <QCoreApplication>
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#include <QtDBus/QDBusServiceWatcher>
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#include <QtDBus/QDBusConnection>
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#include <QtCore/QDebug>
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const QString NM_DBUS_SERVICE = "org.freedesktop.NetworkManager";
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// Define a class with slots
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class NMWatcher: public QObject {
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Q_OBJECT;
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public slots:
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void serviceRegistered(const QString& name);
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void serviceUnregistered(const QString& name);
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};
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void NMWatcher::serviceRegistered(const QString& name)
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{
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std::cout << "Name '" << name.toStdString() << "' registered"
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<< " => NM is running" << std::endl;
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}
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void NMWatcher::serviceUnregistered(const QString& name)
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{
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std::cout << "Name '" << name.toStdString() << "' unregistered"
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<< " => NM is not running" << std::endl;
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}
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int main(int argc, char *argv[])
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{
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QCoreApplication app (argc, argv);
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qDebug() << "Monitor 'org.freedesktop.NetworkManager' D-Bus name";
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qDebug() << "===================================================";
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NMWatcher nm_watcher;
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// Watch all changes of D-Bus NM_DBUS_SERVICE name
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QDBusServiceWatcher *watcher = new QDBusServiceWatcher(NM_DBUS_SERVICE,
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QDBusConnection::systemBus());
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QObject::connect(watcher, SIGNAL(serviceRegistered(const QString&)),
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&nm_watcher, SLOT(serviceRegistered(const QString&)));
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QObject::connect(watcher, SIGNAL(serviceUnregistered(const QString&)),
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&nm_watcher, SLOT(serviceUnregistered(const QString&)));
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app.exec();
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delete watcher;
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return 0;
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}
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#include "monitor-nm-running.moc"
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