File indexing completed on 2024-05-12 04:51:18

 /*
     SPDX-FileCopyrightText: 2009 Nokia Corporation and /or its subsidiary(-ies).
     Contact: Qt Software Information (qt-info@nokia.com)
 
     This file is part of the QtCore module of the Qt Toolkit.
 
     $QT_BEGIN_LICENSE:LGPL$
     Commercial Usage
     Licensees holding valid Qt Commercial licenses may use this file in
     accordance with the Qt Commercial License Agreement provided with the
     Software or, alternatively, in accordance with the terms contained in
     a written agreement between you and Nokia.
 
     GNU Lesser General Public License Usage
     Alternatively, this file may be used under the terms of the GNU Lesser
     General Public License version 2.1 as published by the Free Software
     Foundation and appearing in the file LICENSE.LGPL included in the
     packaging of this file.  Please review the following information to
     ensure the GNU Lesser General Public License version 2.1 requirements
     will be met: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 
     In addition, as a special exception, Nokia gives you certain
     additional rights. These rights are described in the Nokia Qt LGPL
     Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
     package.
 
     GNU General Public License Usage
     Alternatively, this file may be used under the terms of the GNU
     General Public License version 3.0 as published by the Free Software
     Foundation and appearing in the file LICENSE.GPL included in the
     packaging of this file.  Please review the following information to
     ensure the GNU General Public License version 3.0 requirements will be
     met: https://www.gnu.org/licenses/gpl-3.0.html.
 
     If you are unsure which license is appropriate for your use, please
     contact the sales department at qt-sales@nokia.com.
     $QT_END_LICENSE$
 
 */
 
 //#define QPROCESS_DEBUG
 #include <QElapsedTimer>
 #if defined QPROCESS_DEBUG
 #include <qdebug.h>
 #include <QString>
 #include <ctype.h>
 #if !defined(Q_OS_WINCE)
 #include <errno.h>
 #endif
 
 //QT_BEGIN_NAMESPACE
 /*
     Returns a human readable representation of the first \a len
     characters in \a data.
 */
 static QByteArray qt_prettyDebug(const char *data, int len, int maxSize)
 {
     if (!data) return "(null)";
     QByteArray out;
     for (int i = 0; i < len && i < maxSize; ++i) {
         char c = data[i];
         if (isprint(c)) {
             out += c;
         } else switch (c) {
         case '\n': out += "\\n"; break;
         case '\r': out += "\\r"; break;
         case '\t': out += "\\t"; break;
         default:
             char buf[5];
             qsnprintf(buf, sizeof(buf), "\\%3o", c);
             buf[4] = '\0';
             out += QByteArray(buf);
         }
     }
 
     if (len < maxSize)
         out += "...";
 
     return out;
 }
 
 //QT_END_NAMESPACE
 
 #endif
 
 #include "k3bqprocess.h"
 #include "k3bqprocess_p.h"
 
 #include <QByteArray>
 #include <QDateTime>
 #include <qcoreapplication.h>
 #include <qsocketnotifier.h>
 #include <QTimer>
 
 #ifdef Q_WS_WIN
 #include <private/qwineventnotifier_p.h>
 #endif
 
 #ifndef QT_NO_PROCESS
 
 //QT_BEGIN_NAMESPACE
 
 void K3bQProcessPrivate::Channel::clear()
 {
     switch (type) {
     case PipeSource:
         Q_ASSERT(process);
         process->stdinChannel.type = Normal;
         process->stdinChannel.process = 0;
         break;
     case PipeSink:
         Q_ASSERT(process);
         process->stdoutChannel.type = Normal;
         process->stdoutChannel.process = 0;
         break;
     }
 
     type = Normal;
     file.clear();
     process = 0;
 }
 
 /*!
     \class QProcess
 
     \brief The QProcess class is used to start external programs and
     to communicate with them.
 
     \ingroup io
     \ingroup misc
     \mainclass
     \reentrant
 
     To start a process, pass the name and command line arguments of
     the program you want to run as arguments to start(). For example:
 
     \snippet doc/src/snippets/qprocess/qprocess-simpleexecution.cpp 0
     \dots
     \snippet doc/src/snippets/qprocess/qprocess-simpleexecution.cpp 1
     \snippet doc/src/snippets/qprocess/qprocess-simpleexecution.cpp 2
 
     QProcess then enters the \l Starting state, and when the program
     has started, QProcess enters the \l Running state and emits
     started().
 
     QProcess allows you to treat a process as a sequential I/O
     device. You can write to and read from the process just as you
     would access a network connection using QTcpSocket. You can then
     write to the process's standard input by calling write(), and
     read the standard output by calling read(), readLine(), and
     getChar(). Because it inherits QIODevice, QProcess can also be
     used as an input source for QXmlReader, or for generating data to
     be uploaded using QFtp.
 
     \note On Windows CE, reading and writing to a process is not supported.
 
     When the process exits, QProcess reenters the \l NotRunning state
     (the initial state), and emits finished().
 
     The finished() signal provides the exit code and exit status of
     the process as arguments, and you can also call exitCode() to
     obtain the exit code of the last process that finished, and
     exitStatus() to obtain its exit status. If an error occurs at
     any point in time, QProcess will emit the error() signal. You
     can also call error() to find the type of error that occurred
     last, and state() to find the current process state.
 
     \section1 Communicating via Channels
 
     Processes have two predefined output channels: The standard
     output channel (\c stdout) supplies regular console output, and
     the standard error channel (\c stderr) usually supplies the
     errors that are printed by the process. These channels represent
     two separate streams of data. You can toggle between them by
     calling setReadChannel(). QProcess emits readyRead() when data is
     available on the current read channel. It also emits
     readyReadStandardOutput() when new standard output data is
     available, and when new standard error data is available,
     readyReadStandardError() is emitted. Instead of calling read(),
     readLine(), or getChar(), you can explicitly read all data from
     either of the two channels by calling readAllStandardOutput() or
     readAllStandardError().
 
     The terminology for the channels can be misleading. Be aware that
     the process's output channels correspond to QProcess's
     \e read channels, whereas the process's input channels correspond
     to QProcess's \e write channels. This is because what we read
     using QProcess is the process's output, and what we write becomes
     the process's input.
 
     QProcess can merge the two output channels, so that standard
     output and standard error data from the running process both use
     the standard output channel. Call setProcessChannelMode() with
     MergedChannels before starting the process to activate
     this feature. You also have the option of forwarding the output of
     the running process to the calling, main process, by passing
     ForwardedChannels as the argument.
 
     Certain processes need special environment settings in order to
     operate. You can set environment variables for your process by
     calling setEnvironment(). To set a working directory, call
     setWorkingDirectory(). By default, processes are run in the
     current working directory of the calling process.
 
     \section1 Synchronous Process API
 
     QProcess provides a set of functions which allow it to be used
     without an event loop, by suspending the calling thread until
     certain signals are emitted:
 
     \list
     \o waitForStarted() blocks until the process has started.
 
     \o waitForReadyRead() blocks until new data is
     available for reading on the current read channel.
 
     \o waitForBytesWritten() blocks until one payload of
     data has been written to the process.
 
     \o waitForFinished() blocks until the process has finished.
     \endlist
 
     Calling these functions from the main thread (the thread that
     calls QApplication::exec()) may cause your user interface to
     freeze.
 
     The following example runs \c gzip to compress the string "Qt
     rocks!", without an event loop:
 
     \snippet doc/src/snippets/process/process.cpp 0
 
     \section1 Notes for Windows Users
 
     Some Windows commands (for example, \c dir) are not provided by
     separate applications, but by the command interpreter itself.
     If you attempt to use QProcess to execute these commands directly,
     it won't work. One possible solution is to execute the command
     interpreter itself (\c{cmd.exe} on some Windows systems), and ask
     the interpreter to execute the desired command.
 
     \sa QBuffer, QFile, QTcpSocket
 */
 
 /*!
     \enum QProcess::ProcessChannel
 
     This enum describes the process channels used by the running process.
     Pass one of these values to setReadChannel() to set the
     current read channel of QProcess.
 
     \value StandardOutput The standard output (stdout) of the running
            process.
 
     \value StandardError The standard error (stderr) of the running
            process.
 
     \sa setReadChannel()
 */
 
 /*!
     \enum QProcess::ProcessChannelMode
 
     This enum describes the process channel modes of QProcess. Pass
     one of these values to setProcessChannelMode() to set the
     current read channel mode.
 
     \value SeparateChannels QProcess manages the output of the
     running process, keeping standard output and standard error data
     in separate internal buffers. You can select the QProcess's
     current read channel by calling setReadChannel(). This is the
     default channel mode of QProcess.
 
     \value MergedChannels QProcess merges the output of the running
     process into the standard output channel (\c stdout). The
     standard error channel (\c stderr) will not receive any data. The
     standard output and standard error data of the running process
     are interleaved.
 
     \value ForwardedChannels QProcess forwards the output of the
     running process onto the main process. Anything the child process
     writes to its standard output and standard error will be written
     to the standard output and standard error of the main process.
 
     \sa setReadChannelMode()
 */
 
 /*!
     \enum QProcess::ProcessError
 
     This enum describes the different types of errors that are
     reported by QProcess.
 
     \value FailedToStart The process failed to start. Either the
     invoked program is missing, or you may have insufficient
     permissions to invoke the program.
 
     \value Crashed The process crashed some time after starting
     successfully.
 
     \value Timedout The last waitFor...() function timed out. The
     state of QProcess is unchanged, and you can try calling
     waitFor...() again.
 
     \value WriteError An error occurred when attempting to write to the
     process. For example, the process may not be running, or it may
     have closed its input channel.
 
     \value ReadError An error occurred when attempting to read from
     the process. For example, the process may not be running.
 
     \value UnknownError An unknown error occurred. This is the default
     return value of error().
 
     \sa error()
 */
 
 /*!
     \enum QProcess::ProcessState
 
     This enum describes the different states of QProcess.
 
     \value NotRunning The process is not running.
 
     \value Starting The process is starting, but the program has not
     yet been invoked.
 
     \value Running The process is running and is ready for reading and
     writing.
 
     \sa state()
 */
 
 /*!
     \enum QProcess::ExitStatus
 
     This enum describes the different exit statuses of QProcess.
 
     \value NormalExit The process exited normally.
 
     \value CrashExit The process crashed.
 
     \sa exitStatus()
 */
 
 /*!
     \fn void QProcess::error(QProcess::ProcessError error)
 
     This signal is emitted when an error occurs with the process. The
     specified \a error describes the type of error that occurred.
 */
 
 /*!
     \fn void QProcess::started()
 
     This signal is emitted by QProcess when the process has started,
     and state() returns \l Running.
 */
 
 /*!
     \fn void QProcess::stateChanged(QProcess::ProcessState newState)
 
     This signal is emitted whenever the state of QProcess changes. The
     \a newState argument is the state QProcess changed to.
 */
 
 /*!
     \fn void QProcess::finished(int exitCode)
     \obsolete
     \overload
 
     Use finished(int exitCode, QProcess::ExitStatus status) instead.
 */
 
 /*!
     \fn void QProcess::finished(int exitCode, QProcess::ExitStatus exitStatus)
 
     This signal is emitted when the process finishes. \a exitCode is the exit
     code of the process, and \a exitStatus is the exit status.  After the
     process has finished, the buffers in QProcess are still intact. You can
     still read any data that the process may have written before it finished.
 
     \sa exitStatus()
 */
 
 /*!
     \fn void QProcess::readyReadStandardOutput()
 
     This signal is emitted when the process has made new data
     available through its standard output channel (\c stdout). It is
     emitted regardless of the current \l{readChannel()}{read channel}.
 
     \sa readAllStandardOutput(), readChannel()
 */
 
 /*!
     \fn void QProcess::readyReadStandardError()
 
     This signal is emitted when the process has made new data
     available through its standard error channel (\c stderr). It is
     emitted regardless of the current \l{readChannel()}{read
     channel}.
 
     \sa readAllStandardError(), readChannel()
 */
 
 /*! \internal
 */
 K3bQProcessPrivate::K3bQProcessPrivate()
 {
     processChannel = ::QProcess::StandardOutput;
     processChannelMode = ::QProcess::SeparateChannels;
     processError = ::QProcess::UnknownError;
     processState = ::QProcess::NotRunning;
     pid = 0;
     sequenceNumber = 0;
     exitCode = 0;
     exitStatus = ::QProcess::NormalExit;
     startupSocketNotifier = 0;
     deathNotifier = 0;
     notifier = 0;
     pipeWriter = 0;
     childStartedPipe[0] = INVALID_Q_PIPE;
     childStartedPipe[1] = INVALID_Q_PIPE;
     deathPipe[0] = INVALID_Q_PIPE;
     deathPipe[1] = INVALID_Q_PIPE;
     exitCode = 0;
     crashed = false;
     dying = false;
     emittedReadyRead = false;
     emittedBytesWritten = false;
 #ifdef Q_WS_WIN
     pipeWriter = 0;
     processFinishedNotifier = 0;
 #endif // Q_WS_WIN
 #ifdef Q_OS_UNIX
     serial = 0;
 #endif
 }
 
 /*! \internal
 */
 K3bQProcessPrivate::~K3bQProcessPrivate()
 {
     if (stdinChannel.process)
         stdinChannel.process->stdoutChannel.clear();
     if (stdoutChannel.process)
         stdoutChannel.process->stdinChannel.clear();
 }
 
 /*! \internal
 */
 
 void qDeleteInEventHandler(QObject *o);
 
 void K3bQProcessPrivate::cleanup()
 {
     q_func()->setProcessState(::QProcess::NotRunning);
 #ifdef Q_OS_WIN
     if (pid) {
         CloseHandle(pid->hThread);
         CloseHandle(pid->hProcess);
         delete pid;
         pid = 0;
     }
     if (processFinishedNotifier) {
         processFinishedNotifier->setEnabled(false);
         qDeleteInEventHandler(processFinishedNotifier);
         processFinishedNotifier = 0;
     }
 
 #endif
     pid = 0;
     sequenceNumber = 0;
     dying = false;
 
     if (stdoutChannel.notifier) {
         stdoutChannel.notifier->setEnabled(false);
         delete stdoutChannel.notifier;
         stdoutChannel.notifier = 0;
     }
     if (stderrChannel.notifier) {
         stderrChannel.notifier->setEnabled(false);
         delete stderrChannel.notifier;
         stderrChannel.notifier = 0;
     }
     if (stdinChannel.notifier) {
         stdinChannel.notifier->setEnabled(false);
         delete stdinChannel.notifier;
         stdinChannel.notifier = 0;
     }
     if (startupSocketNotifier) {
         startupSocketNotifier->setEnabled(false);
         delete startupSocketNotifier;
         startupSocketNotifier = 0;
     }
     if (deathNotifier) {
         deathNotifier->setEnabled(false);
         delete deathNotifier;
         deathNotifier = 0;
     }
     if (notifier) {
         delete notifier;
         notifier = 0;
     }
     destroyPipe(stdoutChannel.pipe);
     destroyPipe(stderrChannel.pipe);
     destroyPipe(stdinChannel.pipe);
     destroyPipe(childStartedPipe);
     destroyPipe(deathPipe);
 #ifdef Q_OS_UNIX
     serial = 0;
 #endif
 }
 
 /*! \internal
 */
 bool K3bQProcessPrivate::_q_canReadStandardOutput()
 {
     Q_Q(K3bQProcess);
     qint64 available = bytesAvailableFromStdout();
     if (available == 0) {
         if (stdoutChannel.notifier)
             stdoutChannel.notifier->setEnabled(false);
         destroyPipe(stdoutChannel.pipe);
 #if defined QPROCESS_DEBUG
         qDebug("K3bQProcessPrivate::canReadStandardOutput(), 0 bytes available");
 #endif
         return false;
     }
 
     if (!(processFlags & K3bQProcess::RawStdout)) {
         char *ptr = outputReadBuffer.reserve(available);
         qint64 readBytes = readFromStdout(ptr, available);
         if (readBytes == -1) {
             processError = ::QProcess::ReadError;
             q->setErrorString(K3bQProcess::tr("Error reading from process"));
             emit q->error(processError);
 #if defined QPROCESS_DEBUG
             qDebug("K3bQProcessPrivate::canReadStandardOutput(), failed to read from the process");
 #endif
             return false;
         }
 #if defined QPROCESS_DEBUG
         qDebug("K3bQProcessPrivate::canReadStandardOutput(), read %d bytes from the process' output",
                int(readBytes));
 #endif
 
         if (stdoutChannel.closed) {
             outputReadBuffer.chop(readBytes);
             return false;
         }
 
         outputReadBuffer.chop(available - readBytes);
 
         bool didRead = false;
         if (readBytes == 0) {
             if (stdoutChannel.notifier)
                 stdoutChannel.notifier->setEnabled(false);
         } else if (processChannel == ::QProcess::StandardOutput) {
             didRead = true;
             if (!emittedReadyRead) {
                 emittedReadyRead = true;
                 emit q->readyRead();
                 emittedReadyRead = false;
             }
         }
         emit q->readyReadStandardOutput();
         return didRead;
     }
     else {
         if (!emittedReadyRead) {
             emittedReadyRead = true;
             emit q->readyRead();
             emittedReadyRead = false;
         }
         emit q->readyReadStandardOutput();
         return true;
     }
 }
 
 /*! \internal
 */
 bool K3bQProcessPrivate::_q_canReadStandardError()
 {
     Q_Q(K3bQProcess);
     qint64 available = bytesAvailableFromStderr();
     if (available == 0) {
         if (stderrChannel.notifier)
             stderrChannel.notifier->setEnabled(false);
         destroyPipe(stderrChannel.pipe);
         return false;
     }
 
     char *ptr = errorReadBuffer.reserve(available);
     qint64 readBytes = readFromStderr(ptr, available);
     if (readBytes == -1) {
         processError = ::QProcess::ReadError;
         q->setErrorString(K3bQProcess::tr("Error reading from process"));
         emit q->error(processError);
         return false;
     }
     if (stderrChannel.closed) {
         errorReadBuffer.chop(readBytes);
         return false;
     }
 
     errorReadBuffer.chop(available - readBytes);
 
     bool didRead = false;
     if (readBytes == 0) {
         if (stderrChannel.notifier)
             stderrChannel.notifier->setEnabled(false);
     } else if (processChannel == ::QProcess::StandardError) {
         didRead = true;
         if (!emittedReadyRead) {
             emittedReadyRead = true;
             emit q->readyRead();
             emittedReadyRead = false;
         }
     }
     emit q->readyReadStandardError();
     return didRead;
 }
 
 /*! \internal
 */
 bool K3bQProcessPrivate::_q_canWrite()
 {
     Q_Q(K3bQProcess);
     if (processFlags & K3bQProcess::RawStdin) {
         if (stdinChannel.notifier)
             stdinChannel.notifier->setEnabled(false);
         isReadyWrite = true;
         emit q->readyWrite();
     }
     else {
         if (stdinChannel.notifier)
             stdinChannel.notifier->setEnabled(false);
 
         if (writeBuffer.isEmpty()) {
 #if defined QPROCESS_DEBUG
             qDebug("K3bQProcessPrivate::canWrite(), not writing anything (empty write buffer).");
 #endif
             return false;
         }
 
         qint64 written = writeToStdin(writeBuffer.readPointer(),
                                       writeBuffer.nextDataBlockSize());
         if (written < 0) {
             destroyPipe(stdinChannel.pipe);
             processError = ::QProcess::WriteError;
             q->setErrorString(K3bQProcess::tr("Error writing to process"));
 #if defined(QPROCESS_DEBUG) && !defined(Q_OS_WINCE)
             qDebug("K3bQProcessPrivate::canWrite(), failed to write (%s)", strerror(errno));
 #endif
             emit q->error(processError);
             return false;
         }
 
 #if defined QPROCESS_DEBUG
         qDebug("K3bQProcessPrivate::canWrite(), wrote %d bytes to the process input", int(written));
 #endif
 
         writeBuffer.free(written);
         if (!emittedBytesWritten) {
             emittedBytesWritten = true;
             emit q->bytesWritten(written);
             emittedBytesWritten = false;
         }
         if (stdinChannel.notifier && !writeBuffer.isEmpty())
             stdinChannel.notifier->setEnabled(true);
         if (writeBuffer.isEmpty() && stdinChannel.closed)
             closeWriteChannel();
     }
     return true;
 }
 
 /*! \internal
 */
 bool K3bQProcessPrivate::_q_processDied()
 {
 #if defined QPROCESS_DEBUG
     qDebug("K3bQProcessPrivate::_q_processDied()");
 #endif
 #ifdef Q_OS_UNIX
     if (!waitForDeadChild())
         return false;
 #endif
 #ifdef Q_OS_WIN
     if (processFinishedNotifier)
         processFinishedNotifier->setEnabled(false);
 #endif
 
     // the process may have died before it got a chance to report that it was
     // either running or stopped, so we will call _q_startupNotification() and
     // give it a chance to emit started() or error(FailedToStart).
     if (processState == ::QProcess::Starting) {
         if (!_q_startupNotification())
             return true;
     }
 
     return _q_notifyProcessDied();
 }
 
 bool K3bQProcessPrivate::_q_notifyProcessDied()
 {
     Q_Q(K3bQProcess);
 #if defined QPROCESS_DEBUG
     qDebug("K3bQProcessPrivate::_q_notifyProcessDied()");
 #endif
 
     if ( processFlags&K3bQProcess::RawStdout ) {
         qint64 bytes = bytesAvailableFromStdout();
 #if defined QPROCESS_DEBUG
         qDebug() << "bytesAvailableFromStdout:" << bytes;
 #endif
         // wait for all data to be read
         if ( bytes > 0 ) {
             QMetaObject::invokeMethod( q, "_q_notifyProcessDied", Qt::QueuedConnection );
             return false;
         }
     }
 
     if (dying) {
         // at this point we know the process is dead. prevent
         // reentering this slot recursively by calling waitForFinished()
         // or opening a dialog inside slots connected to the readyRead
         // signals emitted below.
         return true;
     }
     dying = true;
 
     // in case there is data in the pipe line and this slot by chance
     // got called before the read notifications, call these two slots
     // so the data is made available before the process dies.
     if ( !processFlags.testFlag( K3bQProcess::RawStdout ) ) {
         _q_canReadStandardOutput();
     }
     _q_canReadStandardError();
     findExitCode();
 
     if (crashed) {
         exitStatus = ::QProcess::CrashExit;
         processError = ::QProcess::Crashed;
         q->setErrorString(K3bQProcess::tr("Process crashed"));
         emit q->error(processError);
     }
 
     bool wasRunning = (processState == ::QProcess::Running);
 
     cleanup();
 
     if (wasRunning) {
         // we received EOF now:
         emit q->readChannelFinished();
         // in the future:
         //emit q->standardOutputClosed();
         //emit q->standardErrorClosed();
 
         emit q->finished(exitCode);
         emit q->finished(exitCode, exitStatus);
     }
 #if defined QPROCESS_DEBUG
     qDebug("K3bQProcessPrivate::_q_notifyProcessDied() process is dead");
 #endif
     return true;
 }
 
 /*! \internal
 */
 bool K3bQProcessPrivate::_q_startupNotification()
 {
     Q_Q(K3bQProcess);
 #if defined QPROCESS_DEBUG
     qDebug("K3bQProcessPrivate::startupNotification()");
 #endif
 
     if (startupSocketNotifier)
         startupSocketNotifier->setEnabled(false);
     if (processStarted()) {
         q->setProcessState(::QProcess::Running);
         emit q->started();
         return true;
     }
 
     q->setProcessState(::QProcess::NotRunning);
     processError = ::QProcess::FailedToStart;
     emit q->error(processError);
 #ifdef Q_OS_UNIX
     // make sure the process manager removes this entry
     waitForDeadChild();
     findExitCode();
 #endif
     cleanup();
     return false;
 }
 
 /*! \internal
 */
 void K3bQProcessPrivate::closeWriteChannel()
 {
 #if defined QPROCESS_DEBUG
     qDebug("K3bQProcessPrivate::closeWriteChannel()");
 #endif
     if (stdinChannel.notifier) {
         stdinChannel.notifier->setEnabled(false);
         if (stdinChannel.notifier) {
             delete stdinChannel.notifier;
             stdinChannel.notifier = 0;
         }
     }
 #ifdef Q_OS_WIN
     // ### Find a better fix, feeding the process little by little
     // instead.
     flushPipeWriter();
 #endif
     destroyPipe(stdinChannel.pipe);
 }
 
 qint64 K3bQProcessPrivate::readData( char *data, qint64 maxlen, QProcess::ProcessChannel channel )
 {
     if (processFlags&K3bQProcess::RawStdout &&
         channel == ::QProcess::StandardOutput) {
         return readFromStdout(data, maxlen);
     }
     else {
         QRingBuffer *readBuffer = (channel == ::QProcess::StandardError)
                                   ? &errorReadBuffer
                                   : &outputReadBuffer;
 
         if (maxlen == 1 && !readBuffer->isEmpty()) {
             int c = readBuffer->getChar();
             if (c == -1) {
 #if defined QPROCESS_DEBUG
                 qDebug("QProcess::readData(%p \"%s\", %d) == -1",
                        data, qt_prettyDebug(data, 1, maxlen).constData(), 1);
 #endif
                 return -1;
             }
             *data = (char) c;
 #if defined QPROCESS_DEBUG
             qDebug("QProcess::readData(%p \"%s\", %d) == 1",
                    data, qt_prettyDebug(data, 1, maxlen).constData(), 1);
 #endif
             return 1;
         }
 
         qint64 bytesToRead = qint64(qMin(readBuffer->size(), (int)maxlen));
         qint64 readSoFar = 0;
         while (readSoFar < bytesToRead) {
             const char *ptr = readBuffer->readPointer();
             int bytesToReadFromThisBlock = qMin<qint64>(bytesToRead - readSoFar,
                                                         readBuffer->nextDataBlockSize());
             memcpy(data + readSoFar, ptr, bytesToReadFromThisBlock);
             readSoFar += bytesToReadFromThisBlock;
             readBuffer->free(bytesToReadFromThisBlock);
         }
 
 #if defined QPROCESS_DEBUG
         qDebug("QProcess::readData(%p \"%s\", %lld) == %lld",
                data, qt_prettyDebug(data, readSoFar, 16).constData(), maxlen, readSoFar);
 #endif
         if (!readSoFar && processState == ::QProcess::NotRunning)
             return -1;              // EOF
         return readSoFar;
     }
 }
 
 /*!
     Constructs a QProcess object with the given \a parent.
 */
 K3bQProcess::K3bQProcess(QObject *parent)
     : QIODevice(parent),
       d_ptr( new K3bQProcessPrivate )
 {
     d_ptr->q_ptr = this;
 //#if defined QPROCESS_DEBUG
     qDebug("K3bQProcess::QProcess(%p)", parent);
 //#endif
 }
 
 /*!
     Destructs the QProcess object, i.e., killing the process.
 
     Note that this function will not return until the process is
     terminated.
 */
 K3bQProcess::~K3bQProcess()
 {
     Q_D(K3bQProcess);
     if (d->processState != ::QProcess::NotRunning) {
         qWarning("QProcess: Destroyed while process is still running.");
         kill();
         waitForFinished();
     }
 #ifdef Q_OS_UNIX
     // make sure the process manager removes this entry
     d->findExitCode();
 #endif
     d->cleanup();
     delete d;
 }
 
 K3bQProcess::ProcessFlags K3bQProcess::flags() const
 {
     Q_D(const K3bQProcess);
     return d->processFlags;
 }
 
 void K3bQProcess::setFlags( K3bQProcess::ProcessFlags flags )
 {
     Q_D(K3bQProcess);
     d->processFlags = flags;
 }
 
 /*!
     \obsolete
     Returns the read channel mode of the QProcess. This function is
     equivalent to processChannelMode()
 
     \sa processChannelMode()
 */
 ::QProcess::ProcessChannelMode K3bQProcess::readChannelMode() const
 {
     return processChannelMode();
 }
 
 /*!
     \obsolete
 
     Use setProcessChannelMode(\a mode) instead.
 
     \sa setProcessChannelMode()
 */
 void K3bQProcess::setReadChannelMode(::QProcess::ProcessChannelMode mode)
 {
     setProcessChannelMode(mode);
 }
 
 /*!
     \since 4.2
 
     Returns the channel mode of the QProcess standard output and
     standard error channels.
 
     \sa setReadChannelMode(), ProcessChannelMode, setReadChannel()
 */
 ::QProcess::ProcessChannelMode K3bQProcess::processChannelMode() const
 {
     Q_D(const K3bQProcess);
     return d->processChannelMode;
 }
 
 /*!
     \since 4.2
 
     Sets the channel mode of the QProcess standard output and standard
     error channels to the \a mode specified.
     This mode will be used the next time start() is called. For example:
 
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 0
 
     \sa readChannelMode(), ProcessChannelMode, setReadChannel()
 */
 void K3bQProcess::setProcessChannelMode(::QProcess::ProcessChannelMode mode)
 {
     Q_D(K3bQProcess);
     d->processChannelMode = mode;
 }
 
 /*!
     Returns the current read channel of the QProcess.
 
     \sa setReadChannel()
 */
 QProcess::ProcessChannel K3bQProcess::readChannel() const
 {
     Q_D(const K3bQProcess);
     return d->processChannel;
 }
 
 /*!
     Sets the current read channel of the QProcess to the given \a
     channel. The current input channel is used by the functions
     read(), readAll(), readLine(), and getChar(). It also determines
     which channel triggers QProcess to emit readyRead().
 
     \sa readChannel()
 */
 void K3bQProcess::setReadChannel(::QProcess::ProcessChannel channel)
 {
     Q_D(K3bQProcess);
 //     if (d->processChannel != channel) {
 //         QByteArray buf = d->buffer.readAll();
 //         if (d->processChannel == QProcess::StandardOutput) {
 //             for (int i = buf.size() - 1; i >= 0; --i)
 //                 d->outputReadBuffer.ungetChar(buf.at(i));
 //         } else {
 //             for (int i = buf.size() - 1; i >= 0; --i)
 //                 d->errorReadBuffer.ungetChar(buf.at(i));
 //         }
 //     }
     d->processChannel = channel;
 }
 
 /*!
     Closes the read channel \a channel. After calling this function,
     QProcess will no longer receive data on the channel. Any data that
     has already been received is still available for reading.
 
     Call this function to save memory, if you are not interested in
     the output of the process.
 
     \sa closeWriteChannel(), setReadChannel()
 */
 void K3bQProcess::closeReadChannel(::QProcess::ProcessChannel channel)
 {
     Q_D(K3bQProcess);
 
     if (channel == ::QProcess::StandardOutput) {
         d->stdoutChannel.closed = true;
         if ( d->processFlags&RawStdout )
             d->destroyPipe(d->stdoutChannel.pipe);
     }
     else
         d->stderrChannel.closed = true;
 }
 
 /*!
     Schedules the write channel of QProcess to be closed. The channel
     will close once all data has been written to the process. After
     calling this function, any attempts to write to the process will
     fail.
 
     Closing the write channel is necessary for programs that read
     input data until the channel has been closed. For example, the
     program "more" is used to display text data in a console on both
     Unix and Windows. But it will not display the text data until
     QProcess's write channel has been closed. Example:
 
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 1
 
     The write channel is implicitly opened when start() is called.
 
     \sa closeReadChannel()
 */
 void K3bQProcess::closeWriteChannel()
 {
     Q_D(K3bQProcess);
     d->stdinChannel.closed = true; // closing
     if (d->writeBuffer.isEmpty())
         d->closeWriteChannel();
 }
 
 /*!
     \since 4.2
 
     Redirects the process' standard input to the file indicated by \a
     fileName. When an input redirection is in place, the QProcess
     object will be in read-only mode (calling write() will result in
     error).
 
     If the file \a fileName does not exist at the moment start() is
     called or is not readable, starting the process will fail.
 
     Calling setStandardInputFile() after the process has started has no
     effect.
 
     \sa setStandardOutputFile(), setStandardErrorFile(),
         setStandardOutputProcess()
 */
 void K3bQProcess::setStandardInputFile(const QString &fileName)
 {
     Q_D(K3bQProcess);
     d->stdinChannel = fileName;
 }
 
 /*!
     \since 4.2
 
     Redirects the process' standard output to the file \a
     fileName. When the redirection is in place, the standard output
     read channel is closed: reading from it using read() will always
     fail, as will readAllStandardOutput().
 
     If the file \a fileName doesn't exist at the moment start() is
     called, it will be created. If it cannot be created, the starting
     will fail.
 
     If the file exists and \a mode is QIODevice::Truncate, the file
     will be truncated. Otherwise (if \a mode is QIODevice::Append),
     the file will be appended to.
 
     Calling setStandardOutputFile() after the process has started has
     no effect.
 
     \sa setStandardInputFile(), setStandardErrorFile(),
         setStandardOutputProcess()
 */
 void K3bQProcess::setStandardOutputFile(const QString &fileName, OpenMode mode)
 {
     Q_ASSERT(mode == Append || mode == Truncate);
     Q_D(K3bQProcess);
 
     d->stdoutChannel = fileName;
     d->stdoutChannel.append = mode == Append;
 }
 
 /*!
     \since 4.2
 
     Redirects the process' standard error to the file \a
     fileName. When the redirection is in place, the standard error
     read channel is closed: reading from it using read() will always
     fail, as will readAllStandardError(). The file will be appended to
     if \a mode is Append, otherwise, it will be truncated.
 
     See setStandardOutputFile() for more information on how the file
     is opened.
 
     Note: if setProcessChannelMode() was called with an argument of
     QProcess::MergedChannels, this function has no effect.
 
     \sa setStandardInputFile(), setStandardOutputFile(),
         setStandardOutputProcess()
 */
 void K3bQProcess::setStandardErrorFile(const QString &fileName, OpenMode mode)
 {
     Q_ASSERT(mode == Append || mode == Truncate);
     Q_D(K3bQProcess);
 
     d->stderrChannel = fileName;
     d->stderrChannel.append = mode == Append;
 }
 
 /*!
     \since 4.2
 
     Pipes the standard output stream of this process to the \a
     destination process' standard input.
 
     The following shell command:
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 2
 
     Can be accomplished with QProcesses with the following code:
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 3
 */
 void K3bQProcess::setStandardOutputProcess(K3bQProcess *destination)
 {
     K3bQProcessPrivate *dfrom = d_func();
     K3bQProcessPrivate *dto = destination->d_func();
     dfrom->stdoutChannel.pipeTo(dto);
     dto->stdinChannel.pipeFrom(dfrom);
 }
 
 /*!
     If QProcess has been assigned a working directory, this function returns
     the working directory that the QProcess will enter before the program has
     started. Otherwise, (i.e., no directory has been assigned,) an empty
     string is returned, and QProcess will use the application's current
     working directory instead.
 
     \sa setWorkingDirectory()
 */
 QString K3bQProcess::workingDirectory() const
 {
     Q_D(const K3bQProcess);
     return d->workingDirectory;
 }
 
 /*!
     Sets the working directory to \a dir. QProcess will start the
     process in this directory. The default behavior is to start the
     process in the working directory of the calling process.
 
     \sa workingDirectory(), start()
 */
 void K3bQProcess::setWorkingDirectory(const QString &dir)
 {
     Q_D(K3bQProcess);
     d->workingDirectory = dir;
 }
 
 /*!
     Returns the native process identifier for the running process, if
     available.  If no process is currently running, 0 is returned.
 */
 Q_PID K3bQProcess::pid() const
 {
     Q_D(const K3bQProcess);
     return d->pid;
 }
 
 /*! \reimp
 
     This function operates on the current read channel.
 
     \sa readChannel(), setReadChannel()
 */
 bool K3bQProcess::canReadLine() const
 {
     Q_D(const K3bQProcess);
     const QRingBuffer *readBuffer = (d->processChannel == ::QProcess::StandardError)
                                     ? &d->errorReadBuffer
                                     : &d->outputReadBuffer;
     return readBuffer->canReadLine() || QIODevice::canReadLine();
 }
 
 /*!
     Closes all communication with the process and kills it. After calling this
     function, QProcess will no longer emit readyRead(), and data can no
     longer be read or written.
 */
 void K3bQProcess::close()
 {
     emit aboutToClose();
     while (waitForBytesWritten(-1))
         ;
     kill();
     waitForFinished(-1);
     QIODevice::close();
 }
 
 /*! \reimp
 
    Returns true if the process is not running, and no more data is available
    for reading; otherwise returns false.
 */
 bool K3bQProcess::atEnd() const
 {
     Q_D(const K3bQProcess);
     const QRingBuffer *readBuffer = (d->processChannel == ::QProcess::StandardError)
                                     ? &d->errorReadBuffer
                                     : &d->outputReadBuffer;
     return QIODevice::atEnd() && (!isOpen() || readBuffer->isEmpty());
 }
 
 /*! \reimp
 */
 bool K3bQProcess::isSequential() const
 {
     return true;
 }
 
 /*! \reimp
 */
 qint64 K3bQProcess::bytesAvailable() const
 {
     Q_D(const K3bQProcess);
     const QRingBuffer *readBuffer = (d->processChannel == ::QProcess::StandardError)
                                     ? &d->errorReadBuffer
                                     : &d->outputReadBuffer;
 #if defined QPROCESS_DEBUG
     qDebug("QProcess::bytesAvailable() == %i (%s)", readBuffer->size(),
            (d->processChannel == ::QProcess::StandardError) ? "stderr" : "stdout");
 #endif
     return readBuffer->size() + QIODevice::bytesAvailable();
 }
 
 /*! \reimp
 */
 qint64 K3bQProcess::bytesToWrite() const
 {
     Q_D(const K3bQProcess);
     qint64 size = d->writeBuffer.size();
 #ifdef Q_OS_WIN
     size += d->pipeWriterBytesToWrite();
 #endif
     return size;
 }
 
 /*!
     Returns the type of error that occurred last.
 
     \sa state()
 */
 ::QProcess::ProcessError K3bQProcess::error() const
 {
     Q_D(const K3bQProcess);
     return d->processError;
 }
 
 /*!
     Returns the current state of the process.
 
     \sa stateChanged(), error()
 */
 ::QProcess::ProcessState K3bQProcess::state() const
 {
     Q_D(const K3bQProcess);
     return d->processState;
 }
 
 /*!
     Sets the environment that QProcess will use when starting a process to the
     \a environment specified which consists of a list of key=value pairs.
 
     For example, the following code adds the \c{C:\\BIN} directory to the list of
     executable paths (\c{PATHS}) on Windows:
 
     \snippet doc/src/snippets/qprocess-environment/main.cpp 0
 
     \sa environment(), systemEnvironment()
 */
 void K3bQProcess::setEnvironment(const QStringList &environment)
 {
     Q_D(K3bQProcess);
     d->environment = environment;
 }
 
 /*!
     Returns the environment that QProcess will use when starting a
     process, or an empty QStringList if no environment has been set
     using setEnvironment(). If no environment has been set, the
     environment of the calling process will be used.
 
     \note The environment settings are ignored on Windows CE,
     as there is no concept of an environment.
 
     \sa setEnvironment(), systemEnvironment()
 */
 QStringList K3bQProcess::environment() const
 {
     Q_D(const K3bQProcess);
     return d->environment;
 }
 
 /*!
     Blocks until the process has started and the started() signal has
     been emitted, or until \a msecs milliseconds have passed.
 
     Returns true if the process was started successfully; otherwise
     returns false (if the operation timed out or if an error
     occurred).
 
     This function can operate without an event loop. It is
     useful when writing non-GUI applications and when performing
     I/O operations in a non-GUI thread.
 
     \warning Calling this function from the main (GUI) thread
     might cause your user interface to freeze.
 
     If msecs is -1, this function will not time out.
 
     \sa started(), waitForReadyRead(), waitForBytesWritten(), waitForFinished()
 */
 bool K3bQProcess::waitForStarted(int msecs)
 {
     Q_D(K3bQProcess);
     if (d->processState == ::QProcess::Starting) {
         if (!d->waitForStarted(msecs))
             return false;
         setProcessState(::QProcess::Running);
         emit started();
     }
     return d->processState == ::QProcess::Running;
 }
 
 /*! \reimp
 */
 bool K3bQProcess::waitForReadyRead(int msecs)
 {
     Q_D(K3bQProcess);
 
     if (d->processState == ::QProcess::NotRunning)
         return false;
     if (d->processChannel == ::QProcess::StandardOutput && d->stdoutChannel.closed)
         return false;
     if (d->processChannel == ::QProcess::StandardError && d->stderrChannel.closed)
         return false;
     return d->waitForReadyRead(msecs);
 }
 
 /*! \reimp
 */
 bool K3bQProcess::waitForBytesWritten(int msecs)
 {
     Q_D(K3bQProcess);
     if (d->processState == ::QProcess::NotRunning)
         return false;
     if (d->processState == ::QProcess::Starting) {
         QElapsedTimer stopWatch;
         stopWatch.start();
         bool started = waitForStarted(msecs);
         if (!started)
             return false;
         if (msecs != -1)
             msecs -= stopWatch.elapsed();
     }
 
     return d->waitForBytesWritten(msecs);
 }
 
 /*!
     Blocks until the process has finished and the finished() signal
     has been emitted, or until \a msecs milliseconds have passed.
 
     Returns true if the process finished; otherwise returns false (if
     the operation timed out or if an error occurred).
 
     This function can operate without an event loop. It is
     useful when writing non-GUI applications and when performing
     I/O operations in a non-GUI thread.
 
     \warning Calling this function from the main (GUI) thread
     might cause your user interface to freeze.
 
     If msecs is -1, this function will not time out.
 
     \sa finished(), waitForStarted(), waitForReadyRead(), waitForBytesWritten()
 */
 bool K3bQProcess::waitForFinished(int msecs)
 {
     Q_D(K3bQProcess);
     if (d->processState == ::QProcess::NotRunning)
         return false;
     if (d->processState == ::QProcess::Starting) {
         QElapsedTimer stopWatch;
         stopWatch.start();
         bool started = waitForStarted(msecs);
         if (!started)
             return false;
         if (msecs != -1)
             msecs -= stopWatch.elapsed();
     }
 
     return d->waitForFinished(msecs);
 }
 
 /*!
     Sets the current state of the QProcess to the \a state specified.
 
     \sa state()
 */
 void K3bQProcess::setProcessState(::QProcess::ProcessState state)
 {
     Q_D(K3bQProcess);
     if (d->processState == state)
         return;
     d->processState = state;
     emit stateChanged(state);
 }
 
 /*!
   This function is called in the child process context just before the
     program is executed on Unix or Mac OS X (i.e., after \e fork(), but before
     \e execve()). Reimplement this function to do last minute initialization
     of the child process. Example:
 
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 4
 
     You cannot exit the process (by calling exit(), for instance) from
     this function. If you need to stop the program before it starts
     execution, your workaround is to emit finished() and then call
     exit().
 
     \warning This function is called by QProcess on Unix and Mac OS X
     only. On Windows, it is not called.
 */
 void K3bQProcess::setupChildProcess()
 {
 }
 
 /*! \reimp
 */
 qint64 K3bQProcess::readData(char *data, qint64 maxlen)
 {
     Q_D(K3bQProcess);
     return d->readData( data, maxlen, d->processChannel );
 }
 
 /*! \reimp
 */
 qint64 K3bQProcess::writeData(const char *data, qint64 len)
 {
     Q_D(K3bQProcess);
 
 #if defined(Q_OS_WINCE)
     Q_UNUSED(data);
     Q_UNUSED(len);
     d->processError = ::QProcess::WriteError;
     setErrorString(tr("Error writing to process"));
     emit error(d->processError);
     return -1;
 #endif
 
     if (d->stdinChannel.closed) {
 #if defined QPROCESS_DEBUG
     qDebug("QProcess::writeData(%p \"%s\", %lld) == 0 (write channel closing)",
            data, qt_prettyDebug(data, len, 16).constData(), len);
 #endif
         return 0;
     }
 
     if (d->processFlags & K3bQProcess::RawStdin) {
         d->waitForBytesWritten();
         qint64 r = d->writeToStdin(data, len);
         if ( r > 0 )
             emit bytesWritten(r);
         return r;
     }
     else {
         if (len == 1) {
             d->writeBuffer.putChar(*data);
             if (d->stdinChannel.notifier)
                 d->stdinChannel.notifier->setEnabled(true);
 #if defined QPROCESS_DEBUG
             qDebug("QProcess::writeData(%p \"%s\", %lld) == 1 (written to buffer)",
                    data, qt_prettyDebug(data, len, 16).constData(), len);
 #endif
             return 1;
         }
 
         char *dest = d->writeBuffer.reserve(len);
         memcpy(dest, data, len);
         if (d->stdinChannel.notifier)
             d->stdinChannel.notifier->setEnabled(true);
 #if defined QPROCESS_DEBUG
         qDebug("QProcess::writeData(%p \"%s\", %lld) == %lld (written to buffer)",
                data, qt_prettyDebug(data, len, 16).constData(), len, len);
 #endif
         return len;
     }
 }
 
 /*!
     Regardless of the current read channel, this function returns all
     data available from the standard output of the process as a
     QByteArray.
 
     \sa readyReadStandardOutput(), readAllStandardError(), readChannel(), setReadChannel()
 */
 QByteArray K3bQProcess::readAllStandardOutput()
 {
     Q_D(K3bQProcess);
     if (!(d->processFlags&RawStdout)) {
         ::QProcess::ProcessChannel tmp = readChannel();
         setReadChannel(::QProcess::StandardOutput);
         QByteArray data = readAll();
         setReadChannel(tmp);
         return data;
     }
     else {
         return QByteArray();
     }
 }
 
 /*!
     Regardless of the current read channel, this function returns all
     data available from the standard error of the process as a
     QByteArray.
 
     \sa readyReadStandardError(), readAllStandardOutput(), readChannel(), setReadChannel()
 */
 QByteArray K3bQProcess::readAllStandardError()
 {
     Q_D(K3bQProcess);
     if (d->processFlags&RawStdout) {
         //
         // HACK: this is an ugly hack to get around the following problem:
         // K3b uses QProcess from different threads. This is no problem unless
         // the read channel is changed here while the other thread tries to read
         // from stdout. It will then result in two reads from stderr instead
         // (this one and the other thread which originally wanted to read from
         // stdout).
         // The "solution" atm is to reimplement QIODevice::readAll here, ignoring its
         // buffer (no real problem since K3b::Process is always opened Unbuffered)
         //
         QByteArray tmp;
         tmp.resize(int(d->errorReadBuffer.size()));
         qint64 readBytes = d->readData(tmp.data(), tmp.size(), QProcess::StandardError);
         tmp.resize(readBytes < 0 ? 0 : int(readBytes));
         return tmp;
     }
     else {
         ::QProcess::ProcessChannel tmp = readChannel();
         setReadChannel(::QProcess::StandardError);
         QByteArray data = readAll();
         setReadChannel(tmp);
         return data;
     }
 }
 
 /*!
     Starts the program \a program in a new process, passing the
     command line arguments in \a arguments. The OpenMode is set to \a
     mode. QProcess will immediately enter the Starting state. If the
     process starts successfully, QProcess will emit started();
     otherwise, error() will be emitted.
 
     Note that arguments that contain spaces are not passed to the
     process as separate arguments.
 
     \bold{Windows:} Arguments that contain spaces are wrapped in quotes.
 
     \note Processes are started asynchronously, which means the started()
     and error() signals may be delayed. Call waitForStarted() to make
     sure the process has started (or has failed to start) and those signals
     have been emitted.
 
     \sa pid(), started(), waitForStarted()
 */
 void K3bQProcess::start(const QString &program, const QStringList &arguments, OpenMode mode)
 {
     Q_D(K3bQProcess);
     if (d->processState != ::QProcess::NotRunning) {
         qWarning("QProcess::start: Process is already running");
         return;
     }
 
 #if defined QPROCESS_DEBUG
     qDebug() << "QProcess::start(" << program << "," << arguments << "," << mode << ")";
 #endif
 
     d->outputReadBuffer.clear();
     d->errorReadBuffer.clear();
 
     d->isReadyWrite = false;
 
     if (d->stdinChannel.type != K3bQProcessPrivate::Channel::Normal)
         mode &= ~WriteOnly;     // not open for writing
     if (d->stdoutChannel.type != K3bQProcessPrivate::Channel::Normal &&
         (d->stderrChannel.type != K3bQProcessPrivate::Channel::Normal ||
          d->processChannelMode == ::QProcess::MergedChannels))
         mode &= ~ReadOnly;      // not open for reading
     if (mode == 0)
         mode = Unbuffered;
     QIODevice::open(mode);
 
     d->stdinChannel.closed = false;
     d->stdoutChannel.closed = false;
     d->stderrChannel.closed = false;
 
     d->program = program;
     d->arguments = arguments;
 
     d->exitCode = 0;
     d->exitStatus = ::QProcess::NormalExit;
     d->processError = ::QProcess::UnknownError;
     setErrorString( QString() );
     d->startProcess();
 }
 
 
 static QStringList parseCombinedArgString(const QString &program)
 {
     QStringList args;
     QString tmp;
     int quoteCount = 0;
     bool inQuote = false;
 
     // handle quoting. tokens can be surrounded by double quotes
     // "hello world". three consecutive double quotes represent
     // the quote character itself.
     for (int i = 0; i < program.size(); ++i) {
         if (program.at(i) == QLatin1Char('"')) {
             ++quoteCount;
             if (quoteCount == 3) {
                 // third consecutive quote
                 quoteCount = 0;
                 tmp += program.at(i);
             }
             continue;
         }
         if (quoteCount) {
             if (quoteCount == 1)
                 inQuote = !inQuote;
             quoteCount = 0;
         }
         if (!inQuote && program.at(i).isSpace()) {
             if (!tmp.isEmpty()) {
                 args += tmp;
                 tmp.clear();
             }
         } else {
             tmp += program.at(i);
         }
     }
     if (!tmp.isEmpty())
         args += tmp;
 
     return args;
 }
 
 /*!
     \overload
 
     Starts the program \a program in a new process. \a program is a
     single string of text containing both the program name and its
     arguments. The arguments are separated by one or more
     spaces. For example:
 
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 5
 
     The \a program string can also contain quotes, to ensure that arguments
     containing spaces are correctly supplied to the new process. For example:
 
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 6
 
     Note that, on Windows, quotes need to be both escaped and quoted.
     For example, the above code would be specified in the following
     way to ensure that \c{"My Documents"} is used as the argument to
     the \c dir executable:
 
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 7
 
     The OpenMode is set to \a mode.
 */
 void K3bQProcess::start(const QString &program, OpenMode mode)
 {
     QStringList args = parseCombinedArgString(program);
 
     QString prog = args.first();
     args.removeFirst();
 
     start(prog, args, mode);
 }
 
 /*!
     Attempts to terminate the process.
 
     The process may not exit as a result of calling this function (it is given
     the chance to prompt the user for any unsaved files, etc).
 
     On Windows, terminate() posts a WM_CLOSE message to all toplevel windows
     of the process and then to the main thread of the process itself. On Unix
     and Mac OS X the SIGTERM signal is sent.
 
     Console applications on Windows that do not run an event loop, or whose
     event loop does not handle the WM_CLOSE message, can only be terminated by
     calling kill().
 
     \sa kill()
 */
 void K3bQProcess::terminate()
 {
     Q_D(K3bQProcess);
     d->terminateProcess();
 }
 
 /*!
     Kills the current process, causing it to exit immediately.
 
     On Windows, kill() uses TerminateProcess, and on Unix and Mac OS X, the
     SIGKILL signal is sent to the process.
 
     \sa terminate()
 */
 void K3bQProcess::kill()
 {
     Q_D(K3bQProcess);
     d->killProcess();
 }
 
 /*!
     Returns the exit code of the last process that finished.
 */
 int K3bQProcess::exitCode() const
 {
     Q_D(const K3bQProcess);
     return d->exitCode;
 }
 
 /*!
     \since 4.1
 
     Returns the exit status of the last process that finished.
 
     On Windows, if the process was terminated with TerminateProcess()
     from another application this function will still return NormalExit
     unless the exit code is less than 0.
 */
 ::QProcess::ExitStatus K3bQProcess::exitStatus() const
 {
     Q_D(const K3bQProcess);
     return d->exitStatus;
 }
 
 /*!
     Starts the program \a program with the arguments \a arguments in a
     new process, and detaches from it. Returns true on success;
     otherwise returns false. If the calling process exits, the
     detached process will continue to live.
 
     Note that arguments that contain spaces are not passed to the
     process as separate arguments.
 
     \bold{Unix:} The started process will run in its own session and act
     like a daemon.
 
     \bold{Windows:} Arguments that contain spaces are wrapped in quotes.
     The started process will run as a regular standalone process.
 
     The process will be started in the directory \a workingDirectory.
 
     If the function is successful then *\a pid is set to the process
     identifier of the started process.
 */
 bool K3bQProcess::startDetached(const QString &program,
                  const QStringList &arguments,
                  const QString &workingDirectory,
                              qint64 *pid)
 {
     return K3bQProcessPrivate::startDetached(program,
                       arguments,
                       workingDirectory,
                       pid);
 }
 
 /*!
     Starts the program \a program with the given \a arguments in a
     new process, and detaches from it. Returns true on success;
     otherwise returns false. If the calling process exits, the
     detached process will continue to live.
 
     Note that arguments that contain spaces are not passed to the
     process as separate arguments.
 
     \bold{Unix:} The started process will run in its own session and act
     like a daemon.
 
     \bold{Windows:} Arguments that contain spaces are wrapped in quotes.
     The started process will run as a regular standalone process.
 */
 bool K3bQProcess::startDetached(const QString &program,
                  const QStringList &arguments)
 {
     return K3bQProcessPrivate::startDetached(program, arguments);
 }
 
 /*!
     \overload
 
     Starts the program \a program in a new process. \a program is a
     single string of text containing both the program name and its
     arguments. The arguments are separated by one or more spaces.
 
     The \a program string can also contain quotes, to ensure that arguments
     containing spaces are correctly supplied to the new process.
 */
 bool K3bQProcess::startDetached(const QString &program)
 {
     QStringList args = parseCombinedArgString(program);
 
     QString prog = args.first();
     args.removeFirst();
 
     return K3bQProcessPrivate::startDetached(prog, args);
 }
 
 QT_BEGIN_INCLUDE_NAMESPACE
 #ifdef Q_OS_MAC
 # include <crt_externs.h>
 # define environ (*_NSGetEnviron())
 #elif defined(Q_OS_WINCE)
   static char *qt_wince_environ[] = { 0 };
 #define environ qt_wince_environ
 #elif !defined(Q_OS_WIN)
   extern char **environ;
 #endif
 QT_END_INCLUDE_NAMESPACE
 
 /*!
     \since 4.1
 
     Returns the environment of the calling process as a list of
     key=value pairs. Example:
 
     \snippet doc/src/snippets/code/src_corelib_io_qprocess.cpp 8
 
     \sa environment(), setEnvironment()
 */
 QStringList K3bQProcess::systemEnvironment()
 {
     QStringList tmp;
 //     char *entry = 0;
 //     int count = 0;
 //     while ((entry = environ[count++]))
 //         tmp << QString::fromLocal8Bit(entry);
     return tmp;
 }
 
 bool K3bQProcess::isReadyWrite() const
 {
     Q_D(const K3bQProcess);
     return d->isReadyWrite;
 }
 
 
 /*!
     \typedef Q_PID
     \relates QProcess
 
     Typedef for the identifiers used to represent processes on the underlying
     platform. On Unix, this corresponds to \l qint64; on Windows, it
     corresponds to \c{_PROCESS_INFORMATION*}.
 
     \sa QProcess::pid()
 */
 
 
 //QT_END_NAMESPACE
 
 #include "moc_k3bqprocess.cpp"
 
 #endif // QT_NO_PROCESS