244 lines
8.6 KiB
C++
244 lines
8.6 KiB
C++
/*************************************************************************
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* Copyright (C) 2008 by Volker Lanz <vl@fidra.de> *
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* Copyright (C) 2016-2018 by Andrius Štikonas <andrius@stikonas.eu> *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 3 of *
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* the License, or (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 *
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* along with this program. If not, see <http://www.gnu.org/licenses/>.*
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*************************************************************************/
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#include "backend/corebackendmanager.h"
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#include "core/device.h"
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#include "core/copysource.h"
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#include "core/copytarget.h"
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#include "core/copysourcedevice.h"
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#include "core/copytargetdevice.h"
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#include "util/externalcommand.h"
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#include "util/report.h"
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#include <QDBusInterface>
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#include <QDBusReply>
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#include <QEventLoop>
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#include <QtGlobal>
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#include <QStandardPaths>
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#include <QString>
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#include <QStringList>
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#include <QTimer>
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#include <QThread>
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#include <QVariant>
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#include <KAuth>
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#include <KJob>
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#include <KLocalizedString>
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/** Creates a new ExternalCommand instance without Report.
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@param cmd the command to run
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@param args the arguments to pass to the command
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*/
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ExternalCommand::ExternalCommand(const QString& cmd, const QStringList& args, const QProcess::ProcessChannelMode processChannelMode) :
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m_Report(nullptr),
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m_Command(cmd),
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m_Args(args),
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m_ExitCode(-1),
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m_Output()
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{
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setup(processChannelMode);
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}
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/** Creates a new ExternalCommand instance with Report.
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@param report the Report to write output to.
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@param cmd the command to run
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@param args the arguments to pass to the command
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*/
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ExternalCommand::ExternalCommand(Report& report, const QString& cmd, const QStringList& args, const QProcess::ProcessChannelMode processChannelMode) :
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m_Report(report.newChild()),
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m_Command(cmd),
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m_Args(args),
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m_ExitCode(-1),
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m_Output()
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{
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setup(processChannelMode);
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}
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void ExternalCommand::setup(const QProcess::ProcessChannelMode processChannelMode)
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{
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arguments.insert(QStringLiteral("environment"), QStringList() << QStringLiteral("LC_ALL=C") << QStringLiteral("LVM_SUPPRESS_FD_WARNINGS=1"));
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arguments.insert(QStringLiteral("processChannelMode"), processChannelMode);
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// connect(this, qOverload<int, QProcess::ExitStatus>(&QProcess::finished), this, &ExternalCommand::onFinished);
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// connect(this, &ExternalCommand::readyReadStandardOutput, this, &ExternalCommand::onReadOutput);
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}
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/** Executes the external command.
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@param timeout timeout to wait for the process to start
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@return true on success
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*/
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bool ExternalCommand::start(int timeout)
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{
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Q_UNUSED(timeout)
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if (report()) {
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report()->setCommand(xi18nc("@info:status", "Command: %1 %2", command(), args().join(QStringLiteral(" "))));
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}
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QString cmd = QStandardPaths::findExecutable(command());
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if (cmd.isEmpty())
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cmd = QStandardPaths::findExecutable(command(), { QStringLiteral("/sbin/"), QStringLiteral("/usr/sbin/"), QStringLiteral("/usr/local/sbin/") });
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if (!QDBusConnection::systemBus().isConnected()) {
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qWarning() << "Could not connect to DBus system bus";
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return false;
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}
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QDBusInterface iface(QStringLiteral("org.kde.kpmcore.helperinterface"),
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QStringLiteral("/Helper"),
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QStringLiteral("org.kde.kpmcore.externalcommand"),
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QDBusConnection::systemBus());
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iface.setTimeout(10 * 24 * 3600 * 1000); // 10 days
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bool rval = false;
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if (iface.isValid()) {
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QDBusPendingCall pcall = iface.asyncCall(QStringLiteral("start"),
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CoreBackendManager::self()->Uuid(),
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cmd,
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args(),
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m_Input,
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QStringList());
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QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(pcall, this);
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QEventLoop loop;
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auto exitLoop = [&] (QDBusPendingCallWatcher *watcher) {
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loop.exit();
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if (watcher->isError())
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qWarning() << watcher->error();
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else {
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QDBusPendingReply<QVariantMap> reply = *watcher;
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m_Output = reply.value()[QStringLiteral("output")].toByteArray();
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setExitCode(reply.value()[QStringLiteral("exitCode")].toInt());
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rval = true;
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}
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};
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connect(watcher, &QDBusPendingCallWatcher::finished, exitLoop);
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loop.exec();
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}
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return rval;
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}
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bool ExternalCommand::copyBlocks(CopySource& source, CopyTarget& target)
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{
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bool rval = true;
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const qint64 blockSize = 10 * 1024 * 1024; // number of bytes per block to copy
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if (!QDBusConnection::systemBus().isConnected()) {
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qWarning() << "Could not connect to DBus system bus";
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return false;
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}
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// TODO KF6:Use new signal-slot syntax
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connect(CoreBackendManager::self()->job(), SIGNAL(percent(KJob*, unsigned long)), this, SLOT(emitProgress(KJob*, unsigned long)));
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connect(CoreBackendManager::self()->job(), &KAuth::ExecuteJob::newData, this, &ExternalCommand::emitReport);
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QDBusInterface iface(QStringLiteral("org.kde.kpmcore.helperinterface"), QStringLiteral("/Helper"), QStringLiteral("org.kde.kpmcore.externalcommand"), QDBusConnection::systemBus());
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iface.setTimeout(10 * 24 * 3600 * 1000); // 10 days
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if (iface.isValid()) {
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// Use asynchronous DBus calls, so that we can process reports and progress
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QDBusPendingCall pcall= iface.asyncCall(QStringLiteral("copyblocks"),
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CoreBackendManager::self()->Uuid(),
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source.path(), source.firstByte(), source.length(),
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target.path(), target.firstByte(), blockSize);
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QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(pcall, this);
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QEventLoop loop;
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auto exitLoop = [&] (QDBusPendingCallWatcher *watcher) {
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loop.exit();
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if (watcher->isError()) {
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qWarning() << watcher->error();
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}
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else {
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QDBusPendingReply<bool> reply = *watcher;
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rval = reply.argumentAt<0>();
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}
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setExitCode(!rval);
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};
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connect(watcher, &QDBusPendingCallWatcher::finished, exitLoop);
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loop.exec();
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}
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return rval;
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}
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bool ExternalCommand::write(const QByteArray& input)
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{
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m_Input = input;
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return true;
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}
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/** Waits for the external command to finish.
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@param timeout timeout to wait until the process finishes.
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@return true on success
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*/
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bool ExternalCommand::waitFor(int timeout)
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{
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// closeWriteChannel();
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/*
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if (!waitForFinished(timeout)) {
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if (report())
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report()->line() << xi18nc("@info:status", "(Command timeout while running)");
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return false;
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}*/
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// onReadOutput();
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Q_UNUSED(timeout)
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return true;
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}
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/** Runs the command.
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@param timeout timeout to use for waiting when starting and when waiting for the process to finish
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@return true on success
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*/
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bool ExternalCommand::run(int timeout)
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{
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return start(timeout) && waitFor(timeout)/* && exitStatus() == 0*/;
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}
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void ExternalCommand::onReadOutput()
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{
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// const QByteArray s = readAllStandardOutput();
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//
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// if(m_Output.length() > 10*1024*1024) { // prevent memory overflow for badly corrupted file systems
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// if (report())
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// report()->line() << xi18nc("@info:status", "(Command is printing too much output)");
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// return;
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// }
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//
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// m_Output += s;
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//
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// if (report())
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// *report() << QString::fromLocal8Bit(s);
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}
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void ExternalCommand::onFinished(int exitCode, QProcess::ExitStatus exitStatus)
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{
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Q_UNUSED(exitStatus)
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setExitCode(exitCode);
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}
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