File indexing completed on 2024-05-05 17:39:48

 /*
     KSysGuard, the KDE System Guard
 
     SPDX-FileCopyrightText: 1999-2001 Chris Schlaeger <cs@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 
 */
 
 #include <QDebug>
 #include <klocalizedstring.h>
 #include <kprocess.h>
 #include <kshell.h>
 
 #include "SensorManager.h"
 #include "ksgrd_debug.h"
 
 #include "SensorShellAgent.h"
 
 using namespace KSGRD;
 
 SensorShellAgent::SensorShellAgent(SensorManager *sm)
     : SensorAgent(sm)
     , mDaemon(nullptr)
 {
 }
 
 SensorShellAgent::~SensorShellAgent()
 {
     if (mDaemon) {
         mDaemon->write("quit\n", sizeof("quit\n") - 1);
         mDaemon->disconnect();
         mDaemon->waitForFinished();
         delete mDaemon;
         mDaemon = nullptr;
     }
 }
 
 bool SensorShellAgent::start(const QString &host, const QString &shell, const QString &command, int)
 {
     mDaemon = new KProcess();
     mDaemon->setOutputChannelMode(KProcess::SeparateChannels);
     mRetryCount = 3;
     setHostName(host);
     mShell = shell;
     mCommand = command;
 
     connect(mDaemon, SIGNAL(error(QProcess::ProcessError)), SLOT(daemonError(QProcess::ProcessError)));
     connect(mDaemon, SIGNAL(finished(int, QProcess::ExitStatus)), SLOT(daemonExited(int, QProcess::ExitStatus)));
     connect(mDaemon.data(), &QProcess::readyReadStandardOutput, this, &SensorShellAgent::msgRcvd);
     connect(mDaemon.data(), &QProcess::readyReadStandardError, this, &SensorShellAgent::errMsgRcvd);
 
     if (!command.isEmpty()) {
         *mDaemon << KShell::splitArgs(command);
     } else
         *mDaemon << mShell << hostName() << QStringLiteral("ksysguardd");
     mDaemon->start();
 
     return true;
 }
 
 void SensorShellAgent::hostInfo(QString &shell, QString &command, int &port) const
 {
     shell = mShell;
     command = mCommand;
     port = -1;
 }
 
 void SensorShellAgent::msgRcvd()
 {
     QByteArray buffer = mDaemon->readAllStandardOutput();
     mRetryCount = 3; // we received an answer, so reset our retry count back to 3
     processAnswer(buffer.constData(), buffer.size());
 }
 
 void SensorShellAgent::errMsgRcvd()
 {
     const QByteArray buffer = mDaemon->readAllStandardOutput();
 
     // Because we read the error buffer in chunks, we may not have a proper utf8 string.
     // We should never get input over stderr anyway, so no need to worry too much about it.
     // But if this is extended, we will need to handle this better
     const QString buf = QString::fromUtf8(buffer);
 
     qCDebug(LIBKSYSGUARD_KSGRD) << "SensorShellAgent: Warning, received text over stderr!"
                                 << "\n"
                                 << buf;
 }
 
 void SensorShellAgent::daemonExited(int exitCode, QProcess::ExitStatus exitStatus)
 {
     Q_UNUSED(exitCode);
     qCDebug(LIBKSYSGUARD_KSGRD) << "daemon exited, exit status " << exitStatus;
     if (mRetryCount-- <= 0 || (mDaemon->start(), !mDaemon->waitForStarted())) {
         setDaemonOnLine(false);
         if (sensorManager()) {
             sensorManager()->disengage(this); // delete ourselves
         }
     }
 }
 
 void SensorShellAgent::daemonError(QProcess::ProcessError errorStatus)
 {
     QString error;
     switch (errorStatus) {
     case QProcess::FailedToStart:
         qCDebug(LIBKSYSGUARD_KSGRD) << "failed to run" << mDaemon->program().join(QLatin1Char(' '));
         error = i18n("Could not run daemon program '%1'.", mDaemon->program().join(" "));
         break;
     case QProcess::Crashed:
     case QProcess::Timedout:
     case QProcess::WriteError:
     case QProcess::ReadError:
     default:
         error = i18n("The daemon program '%1' failed.", mDaemon->program().join(" "));
     }
     setReasonForOffline(error);
     qCDebug(LIBKSYSGUARD_KSGRD) << "Error received " << error << "(" << errorStatus << ")";
     setDaemonOnLine(false);
     if (sensorManager())
         sensorManager()->disengage(this); // delete ourselves
 }
 bool SensorShellAgent::writeMsg(const char *msg, int len)
 {
     // write returns -1 on error, in which case we should return false.  true otherwise.
     return mDaemon->write(msg, len) != -1;
 }