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/*
* LinuxSessionFunctions.cpp - implementation of LinuxSessionFunctions class
*
* Copyright (c) 2020-2021 Tobias Junghans <tobydox@veyon.io>
*
* This file is part of Veyon - https://veyon.io
*
* 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include <QDateTime>
#include <QDBusReply>
#include <QProcessEnvironment>
#include <proc/readproc.h>
#include "LinuxSessionFunctions.h"
#include "PlatformSessionManager.h"
LinuxSessionFunctions::SessionId LinuxSessionFunctions::currentSessionId()
{
return PlatformSessionManager::resolveSessionId( getSessionId( currentSessionPath() ) );
}
QVariant LinuxSessionFunctions::getSessionProperty( const QString& session, const QString& property )
{
QDBusInterface loginManager( QStringLiteral("org.freedesktop.login1"),
session,
QStringLiteral("org.freedesktop.DBus.Properties"),
QDBusConnection::systemBus() );
const QDBusReply<QDBusVariant> reply = loginManager.call( QStringLiteral("Get"),
QStringLiteral("org.freedesktop.login1.Session"),
property );
if( reply.isValid() == false )
{
vCritical() << "Could not query session property" << property << reply.error().message();
return {};
}
return reply.value().variant();
}
int LinuxSessionFunctions::getSessionLeaderPid( const QString& session )
{
const auto leader = getSessionProperty( session, QStringLiteral("Leader") );
if( leader.isNull() )
{
return -1;
}
return leader.toInt();
}
qint64 LinuxSessionFunctions::getSessionUptimeSeconds( const QString& session )
{
const auto sessionUptimeUsec = getSessionProperty( session, QStringLiteral("Timestamp") );
if( sessionUptimeUsec.isNull() )
{
return -1;
}
#if QT_VERSION < QT_VERSION_CHECK(5, 8, 0)
const auto currentTimestamp = QDateTime::currentMSecsSinceEpoch() / 1000;
#else
const auto currentTimestamp = QDateTime::currentSecsSinceEpoch();
#endif
return currentTimestamp - qint64( sessionUptimeUsec.toLongLong() / ( 1000 * 1000 ) );
}
QString LinuxSessionFunctions::getSessionType( const QString& session )
{
return getSessionProperty( session, QStringLiteral("Type") ).toString();
}
QString LinuxSessionFunctions::getSessionId( const QString& session )
{
return getSessionProperty( session, QStringLiteral("Id") ).toString();
}
LinuxSessionFunctions::State LinuxSessionFunctions::getSessionState( const QString& session )
{
static const QMap<QString, State> stateMap{
{ QStringLiteral("offline"), State::Offline },
{ QStringLiteral("lingering"), State::Lingering },
{ QStringLiteral("online"), State::Online },
{ QStringLiteral("active"), State::Active },
{ QStringLiteral("opening"), State::Opening },
{ QStringLiteral("closing"), State::Closing },
};
const auto stateString = getSessionProperty( session, QStringLiteral("State") ).toString();
const auto state = stateMap.value( stateString, State::Unknown );
if( state == State::Unknown )
{
vDebug() << stateString;
}
return state;
}
LinuxSessionFunctions::LoginDBusSessionSeat LinuxSessionFunctions::getSessionSeat( const QString& session )
{
const auto seatArgument = getSessionProperty( session, QStringLiteral("Seat") ).value<QDBusArgument>();
LoginDBusSessionSeat seat;
seatArgument.beginStructure();
seatArgument >> seat.id;
seatArgument >> seat.path;
seatArgument.endStructure();
return seat;
}
QProcessEnvironment LinuxSessionFunctions::getSessionEnvironment( int sessionLeaderPid )
{
QProcessEnvironment sessionEnv;
PROCTAB* proc = openproc( PROC_FILLSTATUS | PROC_FILLENV );
proc_t* procInfo = nullptr;
QList<int> ppids;
while( ( procInfo = readproc( proc, nullptr ) ) )
{
if( ( procInfo->ppid == sessionLeaderPid || ppids.contains( procInfo->ppid ) ) &&
procInfo->environ != nullptr )
{
for( int i = 0; procInfo->environ[i]; ++i )
{
const auto env = QString::fromUtf8( procInfo->environ[i] ).split( QLatin1Char('=') );
sessionEnv.insert( env.first(), env.mid( 1 ).join( QLatin1Char('=') ) );
}
ppids.append( procInfo->tid );
}
freeproc( procInfo );
}
closeproc( proc );
return sessionEnv;
}
QString LinuxSessionFunctions::currentSessionType() const
{
const auto env = QProcessEnvironment::systemEnvironment();
if( env.contains( QStringLiteral("WAYLAND_DISPLAY") ) )
{
return QStringLiteral("wayland");
}
else if( env.contains( QStringLiteral("DISPLAY") ) )
{
return QStringLiteral("x11");
}
return getSessionType( currentSessionPath() );
}
QString LinuxSessionFunctions::currentSessionPath()
{
const auto xdgSessionId = QProcessEnvironment::systemEnvironment().value( xdgSessionIdEnvVarName() );
if( xdgSessionId.isEmpty() )
{
return QStringLiteral("/org/freedesktop/login1/session/self");
}
return QStringLiteral("/org/freedesktop/login1/session/%1").arg( xdgSessionId );
}
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