1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
|
/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2014 Martin Gräßlin <mgraesslin@kde.org>
This program 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 program 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 <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "logind.h"
#include <QCoreApplication>
#include <QDebug>
#include <QDBusConnection>
#include <QDBusConnectionInterface>
#include <QDBusPendingCallWatcher>
#include <QDBusServiceWatcher>
#include <QDBusUnixFileDescriptor>
#include <QDBusMetaType>
#include <sys/stat.h>
#include <unistd.h>
#include "utils.h"
struct DBusLogindSeat {
QString name;
QDBusObjectPath path;
};
QDBusArgument &operator<<(QDBusArgument &argument, const DBusLogindSeat &seat)
{
argument.beginStructure();
argument << seat.name << seat.path ;
argument.endStructure();
return argument;
}
const QDBusArgument &operator>>(const QDBusArgument &argument, DBusLogindSeat &seat)
{
argument.beginStructure();
argument >> seat.name >> seat.path;
argument.endStructure();
return argument;
}
Q_DECLARE_METATYPE(DBusLogindSeat)
namespace KWin
{
const static QString s_login1Service = QStringLiteral("org.freedesktop.login1");
const static QString s_login1Path = QStringLiteral("/org/freedesktop/login1");
const static QString s_login1ManagerInterface = QStringLiteral("org.freedesktop.login1.Manager");
const static QString s_login1SessionInterface = QStringLiteral("org.freedesktop.login1.Session");
const static QString s_dbusPropertiesInterface = QStringLiteral("org.freedesktop.DBus.Properties");
LogindIntegration *LogindIntegration::s_self = nullptr;
LogindIntegration *LogindIntegration::create(QObject *parent)
{
Q_ASSERT(!s_self);
s_self = new LogindIntegration(parent);
return s_self;
}
LogindIntegration::LogindIntegration(const QDBusConnection &connection, QObject *parent)
: QObject(parent)
, m_bus(connection)
, m_logindServiceWatcher(new QDBusServiceWatcher(s_login1Service,
m_bus,
QDBusServiceWatcher::WatchForUnregistration | QDBusServiceWatcher::WatchForRegistration,
this))
, m_connected(false)
, m_sessionControl(false)
, m_sessionActive(false)
{
connect(m_logindServiceWatcher, &QDBusServiceWatcher::serviceRegistered, this, &LogindIntegration::logindServiceRegistered);
connect(m_logindServiceWatcher, &QDBusServiceWatcher::serviceUnregistered, this,
[this]() {
m_connected = false;
emit connectedChanged();
}
);
// check whether the logind service is registered
QDBusMessage message = QDBusMessage::createMethodCall(QStringLiteral("org.freedesktop.DBus"),
QStringLiteral("/"),
QStringLiteral("org.freedesktop.DBus"),
QStringLiteral("ListNames"));
QDBusPendingReply<QStringList> async = m_bus.asyncCall(message);
QDBusPendingCallWatcher *callWatcher = new QDBusPendingCallWatcher(async, this);
connect(callWatcher, &QDBusPendingCallWatcher::finished, this,
[this](QDBusPendingCallWatcher *self) {
QDBusPendingReply<QStringList> reply = *self;
self->deleteLater();
if (!reply.isValid()) {
return;
}
if (reply.value().contains(s_login1Service)) {
logindServiceRegistered();
}
}
);
}
LogindIntegration::LogindIntegration(QObject *parent)
: LogindIntegration(QDBusConnection::systemBus(), parent)
{
}
LogindIntegration::~LogindIntegration()
{
s_self = nullptr;
}
void LogindIntegration::logindServiceRegistered()
{
const QByteArray sessionId = qgetenv("XDG_SESSION_ID");
QString methodName;
QVariantList args;
if (sessionId.isEmpty()) {
methodName = QStringLiteral("GetSessionByPID");
args << (quint32) QCoreApplication::applicationPid();
} else {
methodName = QStringLiteral("GetSession");
args << QString::fromLocal8Bit(sessionId);
}
// get the current session
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
s_login1Path,
s_login1ManagerInterface,
methodName);
message.setArguments(args);
QDBusPendingReply<QDBusObjectPath> session = m_bus.asyncCall(message);
QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(session, this);
connect(watcher, &QDBusPendingCallWatcher::finished, this,
[this](QDBusPendingCallWatcher *self) {
QDBusPendingReply<QDBusObjectPath> reply = *self;
self->deleteLater();
if (m_connected) {
return;
}
if (!reply.isValid()) {
qCDebug(KWIN_CORE) << "The session is not registered with logind" << reply.error().message();
return;
}
m_sessionPath = reply.value().path();
qCDebug(KWIN_CORE) << "Session path:" << m_sessionPath;
m_connected = true;
connectSessionPropertiesChanged();
// activate the session, in case we are not on it
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_sessionPath,
s_login1SessionInterface,
QStringLiteral("Activate"));
// blocking on purpose
m_bus.call(message);
getSeat();
getSessionActive();
getVirtualTerminal();
emit connectedChanged();
}
);
}
void LogindIntegration::connectSessionPropertiesChanged()
{
m_bus.connect(s_login1Service,
m_sessionPath,
s_dbusPropertiesInterface,
QStringLiteral("PropertiesChanged"),
this,
SLOT(getSessionActive()));
m_bus.connect(s_login1Service,
m_sessionPath,
s_dbusPropertiesInterface,
QStringLiteral("PropertiesChanged"),
this,
SLOT(getVirtualTerminal()));
}
void LogindIntegration::getSessionActive()
{
if (!m_connected || m_sessionPath.isEmpty()) {
return;
}
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_sessionPath,
s_dbusPropertiesInterface,
QStringLiteral("Get"));
message.setArguments(QVariantList({s_login1SessionInterface, QStringLiteral("Active")}));
QDBusPendingReply<QVariant> reply = m_bus.asyncCall(message);
QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(reply, this);
connect(watcher, &QDBusPendingCallWatcher::finished, this,
[this](QDBusPendingCallWatcher *self) {
QDBusPendingReply<QVariant> reply = *self;
self->deleteLater();
if (!reply.isValid()) {
qCDebug(KWIN_CORE) << "Failed to get Active Property of logind session:" << reply.error().message();
return;
}
const bool active = reply.value().toBool();
if (m_sessionActive != active) {
m_sessionActive = active;
emit sessionActiveChanged(m_sessionActive);
}
}
);
}
void LogindIntegration::getVirtualTerminal()
{
if (!m_connected || m_sessionPath.isEmpty()) {
return;
}
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_sessionPath,
s_dbusPropertiesInterface,
QStringLiteral("Get"));
message.setArguments(QVariantList({s_login1SessionInterface, QStringLiteral("VTNr")}));
QDBusPendingReply<QVariant> reply = m_bus.asyncCall(message);
QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(reply, this);
connect(watcher, &QDBusPendingCallWatcher::finished, this,
[this](QDBusPendingCallWatcher *self) {
QDBusPendingReply<QVariant> reply = *self;
self->deleteLater();
if (!reply.isValid()) {
qCDebug(KWIN_CORE) << "Failed to get VTNr Property of logind session:" << reply.error().message();
return;
}
const int vt = reply.value().toUInt();
if (m_vt != (int)vt) {
m_vt = vt;
emit virtualTerminalChanged(m_vt);
}
}
);
}
void LogindIntegration::takeControl()
{
if (!m_connected || m_sessionPath.isEmpty() || m_sessionControl) {
return;
}
static bool s_recursionCheck = false;
if (s_recursionCheck) {
return;
}
s_recursionCheck = true;
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_sessionPath,
s_login1SessionInterface,
QStringLiteral("TakeControl"));
message.setArguments(QVariantList({QVariant(false)}));
QDBusPendingReply<void> session = m_bus.asyncCall(message);
QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(session, this);
connect(watcher, &QDBusPendingCallWatcher::finished, this,
[this](QDBusPendingCallWatcher *self) {
s_recursionCheck = false;
QDBusPendingReply<void> reply = *self;
self->deleteLater();
if (!reply.isValid()) {
qCDebug(KWIN_CORE) << "Failed to get session control" << reply.error().message();
emit hasSessionControlChanged(false);
return;
}
qCDebug(KWIN_CORE) << "Gained session control";
m_sessionControl = true;
emit hasSessionControlChanged(true);
m_bus.connect(s_login1Service, m_sessionPath,
s_login1SessionInterface, QStringLiteral("PauseDevice"),
this, SLOT(pauseDevice(uint,uint,QString)));
}
);
}
void LogindIntegration::releaseControl()
{
if (!m_connected || m_sessionPath.isEmpty() || !m_sessionControl) {
return;
}
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_sessionPath,
s_login1SessionInterface,
QStringLiteral("ReleaseControl"));
m_bus.asyncCall(message);
m_sessionControl = false;
emit hasSessionControlChanged(false);
}
int LogindIntegration::takeDevice(const char *path)
{
struct stat st;
if (stat(path, &st) < 0) {
qCDebug(KWIN_CORE) << "Could not stat the path";
return -1;
}
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_sessionPath,
s_login1SessionInterface,
QStringLiteral("TakeDevice"));
message.setArguments(QVariantList({QVariant(major(st.st_rdev)), QVariant(minor(st.st_rdev))}));
// intended to be a blocking call
QDBusMessage reply = m_bus.call(message);
if (reply.type() == QDBusMessage::ErrorMessage) {
qCDebug(KWIN_CORE) << "Could not take device" << path << ", cause: " << reply.errorMessage();
return -1;
}
return dup(reply.arguments().first().value<QDBusUnixFileDescriptor>().fileDescriptor());
}
void LogindIntegration::releaseDevice(int fd)
{
struct stat st;
if (fstat(fd, &st) < 0) {
qCDebug(KWIN_CORE) << "Could not stat the file descriptor";
return;
}
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_sessionPath,
s_login1SessionInterface,
QStringLiteral("ReleaseDevice"));
message.setArguments(QVariantList({QVariant(major(st.st_rdev)), QVariant(minor(st.st_rdev))}));
m_bus.asyncCall(message);
}
void LogindIntegration::pauseDevice(uint devMajor, uint devMinor, const QString &type)
{
if (QString::compare(type, QStringLiteral("pause"), Qt::CaseInsensitive) == 0) {
// unconditionally call complete
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service, m_sessionPath, s_login1SessionInterface, QStringLiteral("PauseDeviceComplete"));
message.setArguments(QVariantList({QVariant(devMajor), QVariant(devMinor)}));
m_bus.asyncCall(message);
}
}
void LogindIntegration::getSeat()
{
if (m_sessionPath.isEmpty()) {
return;
}
qDBusRegisterMetaType<DBusLogindSeat>();
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_sessionPath,
s_dbusPropertiesInterface,
QStringLiteral("Get"));
message.setArguments(QVariantList({s_login1SessionInterface, QStringLiteral("Seat")}));
QDBusPendingReply<QVariant> reply = m_bus.asyncCall(message);
QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(reply, this);
connect(watcher, &QDBusPendingCallWatcher::finished, this,
[this](QDBusPendingCallWatcher *self) {
QDBusPendingReply<QVariant> reply = *self;
self->deleteLater();
if (!reply.isValid()) {
qCDebug(KWIN_CORE) << "Failed to get Seat Property of logind session:" << reply.error().message();
return;
}
DBusLogindSeat seat = qdbus_cast<DBusLogindSeat>(reply.value().value<QDBusArgument>());
const QString seatPath = seat.path.path();
qCDebug(KWIN_CORE) << "Logind seat:" << seat.name << "/" << seatPath;
if (m_seatPath != seatPath) {
m_seatPath = seatPath;
}
}
);
}
void LogindIntegration::switchVirtualTerminal(quint32 vtNr)
{
if (!m_connected || m_seatPath.isEmpty()) {
return;
}
QDBusMessage message = QDBusMessage::createMethodCall(s_login1Service,
m_seatPath,
QStringLiteral("org.freedesktop.login1.Seat"),
QStringLiteral("SwitchTo"));
message.setArguments(QVariantList{vtNr});
m_bus.asyncCall(message);
}
} // namespace
|
