git.iko.soy/unity8
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unity8/plugins/LightDM/Upstart.cpp
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1/*
2 * Copyright (C) 2013 Canonical, Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 3.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
17#include "Upstart.h"
19#include <QDBusConnection>
20#include <QProcess>
21#include <unistd.h>
23class URLDispatcher : public QObject
25 Q_OBJECT
26 Q_CLASSINFO("D-Bus Interface", "com.canonical.URLDispatcher")
28public:
29 explicit URLDispatcher(Upstart *parent);
31 Q_SCRIPTABLE void DispatchURL(const QString &url);
33private:
34 Upstart *m_parent;
35};
37URLDispatcher::URLDispatcher(Upstart *parent)
38 : QObject(parent),
39 m_parent(parent)
43void URLDispatcher::DispatchURL(const QString &url)
45 Q_EMIT m_parent->dispatchURL(url);
48// Normal unity8 sessions are entirely driven by Upstart. But greeters
49// are special. They need access to the file descriptors that lightdm
50// creates for them and don't want to start all the services that a normal
51// session would. So it's inconvenient to live within an upstart session.
52// But... we still want to use Upstart for some services. So rather than being
53// spawned *by* Upstart like unity8 is, we spawn *it* instead.
54Upstart::Upstart(QObject *parent)
55 : QObject(parent)
57 // This class also manages our url-dispatcher interception, as it's sort of
58 // a service provided by Upstart normally. We intercept url-dispatcher
59 // because rather than spawning the handler for the URL in our own session,
60 // we want to do notify the user session to do it for us (and start an
61 // unlock in the process).
62 QDBusConnection connection = QDBusConnection::sessionBus();
63 URLDispatcher *dispatcher = new URLDispatcher(this);
64 connection.registerObject("/com/canonical/URLDispatcher", dispatcher, QDBusConnection::ExportScriptableContents);
65 connection.registerService("com.canonical.URLDispatcher");
67 // Start upstart (unless it's already running, like if the user is testing
68 // locally on their desktop)
69 if (QString(qgetenv("UPSTART_SESSION")).isEmpty())
70 {
71 QProcess *upstart = new QProcess(this);
72 upstart->start("/sbin/init --user --startup-event=unity8-greeter-started");
73 }
76#include "Upstart.moc"