diff options
Diffstat (limited to 'src/corelib/io/qprocess.cpp')
| -rw-r--r-- | src/corelib/io/qprocess.cpp | 262 |
1 files changed, 133 insertions, 129 deletions
diff --git a/src/corelib/io/qprocess.cpp b/src/corelib/io/qprocess.cpp index 9dba96b1da..3a475c0267 100644 --- a/src/corelib/io/qprocess.cpp +++ b/src/corelib/io/qprocess.cpp @@ -1,32 +1,38 @@ /**************************************************************************** ** -** Copyright (C) 2015 The Qt Company Ltd. -** Copyright (C) 2015 Intel Corporation -** Contact: http://www.qt.io/licensing/ +** Copyright (C) 2016 The Qt Company Ltd. +** Copyright (C) 2016 Intel Corporation. +** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtCore module of the Qt Toolkit. ** -** $QT_BEGIN_LICENSE:LGPL21$ +** $QT_BEGIN_LICENSE:LGPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms -** and conditions see http://www.qt.io/terms-conditions. For further -** information use the contact form at http://www.qt.io/contact-us. +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. ** ** 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 or version 3 as published by the Free -** Software Foundation and appearing in the file LICENSE.LGPLv21 and -** LICENSE.LGPLv3 included in the packaging of this file. Please review the -** following information to ensure the GNU Lesser General Public License -** requirements will be met: https://www.gnu.org/licenses/lgpl.html and -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. ** -** As a special exception, The Qt Company gives you certain additional -** rights. These rights are described in The Qt Company LGPL Exception -** version 1.1, 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 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** @@ -746,6 +752,47 @@ void QProcessPrivate::Channel::clear() */ /*! + \typedef QProcess::CreateProcessArgumentModifier + \note This typedef is only available on desktop Windows and Windows CE. + + On Windows, QProcess uses the Win32 API function \c CreateProcess to + start child processes. While QProcess provides a comfortable way to start + processes without worrying about platform + details, it is in some cases desirable to fine-tune the parameters that are + passed to \c CreateProcess. This is done by defining a + \c CreateProcessArgumentModifier function and passing it to + \c setCreateProcessArgumentsModifier. + + A \c CreateProcessArgumentModifier function takes one parameter: a pointer + to a \c CreateProcessArguments struct. The members of this struct will be + passed to \c CreateProcess after the \c CreateProcessArgumentModifier + function is called. + + The following example demonstrates how to pass custom flags to + \c CreateProcess. + When starting a console process B from a console process A, QProcess will + reuse the console window of process A for process B by default. In this + example, a new console window with a custom color scheme is created for the + child process B instead. + + \snippet qprocess/qprocess-createprocessargumentsmodifier.cpp 0 + + \sa QProcess::CreateProcessArguments + \sa setCreateProcessArgumentsModifier() +*/ + +/*! + \class QProcess::CreateProcessArguments + \note This struct is only available on the Windows platform. + + This struct is a representation of all parameters of the Windows API + function \c CreateProcess. It is used as parameter for + \c CreateProcessArgumentModifier functions. + + \sa QProcess::CreateProcessArgumentModifier +*/ + +/*! \fn void QProcess::error(QProcess::ProcessError error) \obsolete @@ -821,7 +868,8 @@ void QProcessPrivate::Channel::clear() */ QProcessPrivate::QProcessPrivate() { - processChannel = QProcess::StandardOutput; + readBufferChunkSize = QRINGBUFFER_CHUNKSIZE; + writeBufferChunkSize = QRINGBUFFER_CHUNKSIZE; processChannelMode = QProcess::SeparateChannels; inputChannelMode = QProcess::ManagedInputChannel; processError = QProcess::UnknownError; @@ -835,7 +883,6 @@ QProcessPrivate::QProcessPrivate() childStartedPipe[0] = INVALID_Q_PIPE; childStartedPipe[1] = INVALID_Q_PIPE; forkfd = -1; - exitCode = 0; crashed = false; dying = false; emittedReadyRead = false; @@ -973,10 +1020,15 @@ bool QProcessPrivate::tryReadFromChannel(Channel *channel) if (available == 0) available = 1; // always try to read at least one byte - char *ptr = channel->buffer.reserve(available); + QProcess::ProcessChannel channelIdx = (channel == &stdoutChannel + ? QProcess::StandardOutput + : QProcess::StandardError); + Q_ASSERT(readBuffers.size() > int(channelIdx)); + QRingBuffer &readBuffer = readBuffers[int(channelIdx)]; + char *ptr = readBuffer.reserve(available); qint64 readBytes = readFromChannel(channel, ptr, available); if (readBytes <= 0) - channel->buffer.chop(available); + readBuffer.chop(available); if (readBytes == -2) { // EWOULDBLOCK return false; @@ -1004,18 +1056,17 @@ bool QProcessPrivate::tryReadFromChannel(Channel *channel) #endif if (channel->closed) { - channel->buffer.chop(readBytes); + readBuffer.chop(readBytes); return false; } - channel->buffer.chop(available - readBytes); + readBuffer.chop(available - readBytes); bool didRead = false; - bool isStdout = channel == &stdoutChannel; if (readBytes == 0) { if (channel->notifier) channel->notifier->setEnabled(false); - } else if ((processChannel == QProcess::StandardOutput) == isStdout) { + } else if (currentReadChannel == channelIdx) { didRead = true; if (!emittedReadyRead) { emittedReadyRead = true; @@ -1023,7 +1074,8 @@ bool QProcessPrivate::tryReadFromChannel(Channel *channel) emittedReadyRead = false; } } - if (isStdout) + emit q->channelReadyRead(int(channelIdx)); + if (channelIdx == QProcess::StandardOutput) emit q->readyReadStandardOutput(QProcess::QPrivateSignal()); else emit q->readyReadStandardError(QProcess::QPrivateSignal()); @@ -1054,7 +1106,7 @@ bool QProcessPrivate::_q_canWrite() if (stdinChannel.notifier) stdinChannel.notifier->setEnabled(false); - if (stdinChannel.buffer.isEmpty()) { + if (writeBuffer.isEmpty()) { #if defined QPROCESS_DEBUG qDebug("QProcessPrivate::canWrite(), not writing anything (empty write buffer)."); #endif @@ -1063,9 +1115,9 @@ bool QProcessPrivate::_q_canWrite() const bool writeSucceeded = writeToStdin(); - if (stdinChannel.notifier && !stdinChannel.buffer.isEmpty()) + if (stdinChannel.notifier && !writeBuffer.isEmpty()) stdinChannel.notifier->setEnabled(true); - if (stdinChannel.buffer.isEmpty() && stdinChannel.closed) + if (writeBuffer.isEmpty() && stdinChannel.closed) closeWriteChannel(); return writeSucceeded; } @@ -1313,7 +1365,7 @@ void QProcess::setInputChannelMode(InputChannelMode mode) QProcess::ProcessChannel QProcess::readChannel() const { Q_D(const QProcess); - return d->processChannel; + return ProcessChannel(d->currentReadChannel); } /*! @@ -1326,18 +1378,7 @@ QProcess::ProcessChannel QProcess::readChannel() const */ void QProcess::setReadChannel(ProcessChannel channel) { - Q_D(QProcess); - if (d->processChannel != channel) { - QByteArray buf = d->buffer.readAll(); - if (d->processChannel == QProcess::StandardOutput) { - for (int i = buf.size() - 1; i >= 0; --i) - d->stdoutChannel.buffer.ungetChar(buf.at(i)); - } else { - for (int i = buf.size() - 1; i >= 0; --i) - d->stderrChannel.buffer.ungetChar(buf.at(i)); - } - } - d->processChannel = channel; + QIODevice::setCurrentReadChannel(int(channel)); } /*! @@ -1382,7 +1423,7 @@ void QProcess::closeWriteChannel() { Q_D(QProcess); d->stdinChannel.closed = true; // closing - if (d->stdinChannel.buffer.isEmpty()) + if (d->writeBuffer.isEmpty()) d->closeWriteChannel(); } @@ -1535,6 +1576,39 @@ void QProcess::setNativeArguments(const QString &arguments) d->nativeArguments = arguments; } +/*! + \since 5.7 + + Returns a previously set \c CreateProcess modifier function. + + \note This function is available only on the Windows platform. + + \sa setCreateProcessArgumentsModifier() + \sa QProcess::CreateProcessArgumentModifier +*/ +QProcess::CreateProcessArgumentModifier QProcess::createProcessArgumentsModifier() const +{ + Q_D(const QProcess); + return d->modifyCreateProcessArgs; +} + +/*! + \since 5.7 + + Sets the \a modifier for the \c CreateProcess Win32 API call. + Pass \c QProcess::CreateProcessArgumentModifier() to remove a previously set one. + + \note This function is available only on the Windows platform and requires + C++11. + + \sa QProcess::CreateProcessArgumentModifier +*/ +void QProcess::setCreateProcessArgumentsModifier(CreateProcessArgumentModifier modifier) +{ + Q_D(QProcess); + d->modifyCreateProcessArgs = modifier; +} + #endif /*! @@ -1610,11 +1684,7 @@ qint64 QProcess::processId() const */ bool QProcess::canReadLine() const { - Q_D(const QProcess); - const QRingBuffer *readBuffer = (d->processChannel == QProcess::StandardError) - ? &d->stderrChannel.buffer - : &d->stdoutChannel.buffer; - return readBuffer->canReadLine() || QIODevice::canReadLine(); + return QIODevice::canReadLine(); } /*! @@ -1624,11 +1694,13 @@ bool QProcess::canReadLine() const */ void QProcess::close() { + Q_D(QProcess); emit aboutToClose(); while (waitForBytesWritten(-1)) ; kill(); waitForFinished(-1); + d->setWriteChannelCount(0); QIODevice::close(); } @@ -1639,11 +1711,7 @@ void QProcess::close() */ bool QProcess::atEnd() const { - Q_D(const QProcess); - const QRingBuffer *readBuffer = (d->processChannel == QProcess::StandardError) - ? &d->stderrChannel.buffer - : &d->stdoutChannel.buffer; - return QIODevice::atEnd() && (!isOpen() || readBuffer->isEmpty()); + return QIODevice::atEnd(); } /*! \reimp @@ -1657,25 +1725,16 @@ bool QProcess::isSequential() const */ qint64 QProcess::bytesAvailable() const { - Q_D(const QProcess); - const QRingBuffer *readBuffer = (d->processChannel == QProcess::StandardError) - ? &d->stderrChannel.buffer - : &d->stdoutChannel.buffer; -#if defined QPROCESS_DEBUG - qDebug("QProcess::bytesAvailable() == %i (%s)", readBuffer->size(), - (d->processChannel == QProcess::StandardError) ? "stderr" : "stdout"); -#endif - return readBuffer->size() + QIODevice::bytesAvailable(); + return QIODevice::bytesAvailable(); } /*! \reimp */ qint64 QProcess::bytesToWrite() const { - Q_D(const QProcess); - qint64 size = d->stdinChannel.buffer.size(); + qint64 size = QIODevice::bytesToWrite(); #ifdef Q_OS_WIN - size += d->pipeWriterBytesToWrite(); + size += d_func()->pipeWriterBytesToWrite(); #endif return size; } @@ -1814,9 +1873,9 @@ bool QProcess::waitForReadyRead(int msecs) if (d->processState == QProcess::NotRunning) return false; - if (d->processChannel == QProcess::StandardOutput && d->stdoutChannel.closed) + if (d->currentReadChannel == QProcess::StandardOutput && d->stdoutChannel.closed) return false; - if (d->processChannel == QProcess::StandardError && d->stderrChannel.closed) + if (d->currentReadChannel == QProcess::StandardError && d->stderrChannel.closed) return false; return d->waitForReadyRead(msecs); } @@ -1915,47 +1974,12 @@ void QProcess::setupChildProcess() qint64 QProcess::readData(char *data, qint64 maxlen) { Q_D(QProcess); + Q_UNUSED(data); if (!maxlen) return 0; - QRingBuffer *readBuffer = (d->processChannel == QProcess::StandardError) - ? &d->stderrChannel.buffer - : &d->stdoutChannel.buffer; - - 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 = qMin(readBuffer->size(), maxlen); - qint64 readSoFar = 0; - while (readSoFar < bytesToRead) { - const char *ptr = readBuffer->readPointer(); - qint64 bytesToReadFromThisBlock = qMin(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 && d->processState == QProcess::NotRunning) + if (d->processState == QProcess::NotRunning) return -1; // EOF - return readSoFar; + return 0; } /*! \reimp @@ -1988,24 +2012,7 @@ qint64 QProcess::writeData(const char *data, qint64 len) } #endif - if (len == 1) { - d->stdinChannel.buffer.putChar(*data); -#ifdef Q_OS_WIN - if (!d->stdinWriteTrigger->isActive()) - d->stdinWriteTrigger->start(); -#else - if (d->stdinChannel.notifier) - d->stdinChannel.notifier->setEnabled(true); -#endif -#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->stdinChannel.buffer.reserve(len); - memcpy(dest, data, len); + d->writeBuffer.append(data, len); #ifdef Q_OS_WIN if (!d->stdinWriteTrigger->isActive()) d->stdinWriteTrigger->start(); @@ -2156,10 +2163,6 @@ void QProcessPrivate::start(QIODevice::OpenMode mode) qDebug() << "QProcess::start(" << program << ',' << arguments << ',' << mode << ')'; #endif - stdinChannel.buffer.clear(); - stdoutChannel.buffer.clear(); - stderrChannel.buffer.clear(); - if (stdinChannel.type != QProcessPrivate::Channel::Normal) mode &= ~QIODevice::WriteOnly; // not open for writing if (stdoutChannel.type != QProcessPrivate::Channel::Normal && @@ -2180,6 +2183,9 @@ void QProcessPrivate::start(QIODevice::OpenMode mode) q->QIODevice::open(mode); + if (q->isReadable() && processChannelMode != QProcess::MergedChannels) + setReadChannelCount(2); + stdinChannel.closed = false; stdoutChannel.closed = false; stderrChannel.closed = false; @@ -2280,8 +2286,7 @@ void QProcess::start(const QString &command, OpenMode mode) return; } - QString prog = args.first(); - args.removeFirst(); + const QString prog = args.takeFirst(); start(prog, args, mode); } @@ -2523,8 +2528,7 @@ bool QProcess::startDetached(const QString &command) if (args.isEmpty()) return false; - QString prog = args.first(); - args.removeFirst(); + const QString prog = args.takeFirst(); return QProcessPrivate::startDetached(prog, args); } |