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+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qbs.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 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 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.
+**
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "stdinreader.h"
+
+#include <tools/hostosinfo.h>
+
+#include <QtCore/qfile.h>
+#include <QtCore/qsocketnotifier.h>
+
+#include <cerrno>
+#include <cstring>
+
+#ifdef Q_OS_WIN32
+#include <qt_windows.h>
+#include <QtCore/qtimer.h>
+#else
+#include <fcntl.h>
+#endif
+
+namespace qbs {
+namespace Internal {
+
+class UnixStdinReader : public StdinReader
+{
+public:
+ UnixStdinReader(QObject *parent) : StdinReader(parent), m_notifier(0, QSocketNotifier::Read) {}
+
+private:
+ void start() override
+ {
+ if (!m_stdIn.open(stdin, QIODevice::ReadOnly)) {
+ emit errorOccurred(tr("Cannot read from standard input."));
+ return;
+ }
+ const auto emitError = [this] {
+ emit errorOccurred(tr("Failed to make standard input non-blocking: %1")
+ .arg(QLatin1String(std::strerror(errno))));
+ };
+#ifdef Q_OS_UNIX
+ const int flags = fcntl(0, F_GETFL, 0);
+ if (flags == -1) {
+ emitError();
+ return;
+ }
+ if (fcntl(0, F_SETFL, flags | O_NONBLOCK)) {
+ emitError();
+ return;
+ }
+#endif
+ connect(&m_notifier, &QSocketNotifier::activated, this, [this] {
+ emit dataAvailable(m_stdIn.readAll());
+ });
+ }
+
+ QFile m_stdIn;
+ QSocketNotifier m_notifier;
+};
+
+class WindowsStdinReader : public StdinReader
+{
+public:
+ WindowsStdinReader(QObject *parent) : StdinReader(parent) {}
+
+private:
+ void start() override
+ {
+#ifdef Q_OS_WIN32
+ m_stdinHandle = GetStdHandle(STD_INPUT_HANDLE);
+ if (!m_stdinHandle) {
+ emit errorOccurred(tr("Failed to create handle for standard input."));
+ return;
+ }
+
+ // A timer seems slightly less awful than to block in a thread
+ // (how would we abort that one?), but ideally we'd like
+ // to have a signal-based approach like in the Unix variant.
+ const auto timer = new QTimer(this);
+ connect(timer, &QTimer::timeout, this, [this] {
+ char buf[1024];
+ DWORD bytesAvail;
+ PeekNamedPipe(m_stdinHandle, nullptr, 0, nullptr, &bytesAvail, nullptr);
+ while (bytesAvail > 0) {
+ DWORD bytesRead;
+ ReadFile(m_stdinHandle, buf, std::min<DWORD>(bytesAvail, sizeof buf), &bytesRead,
+ nullptr);
+ emit dataAvailable(QByteArray(buf, bytesRead));
+ bytesAvail -= bytesRead;
+ }
+ });
+ timer->start(10);
+#endif
+ }
+
+#ifdef Q_OS_WIN32
+ HANDLE m_stdinHandle;
+#endif
+};
+
+StdinReader *StdinReader::create(QObject *parent)
+{
+ if (HostOsInfo::isWindowsHost())
+ return new WindowsStdinReader(parent);
+ return new UnixStdinReader(parent);
+}
+
+StdinReader::StdinReader(QObject *parent) : QObject(parent) { }
+
+} // namespace Internal
+} // namespace qbs