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// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2019 Luxoft Sweden AB
// Copyright (C) 2018 Pelagicore AG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <QThread>
#include <QCoreApplication>
#include "interrupthandler.h"
#include "unixsignalhandler.h"
#if defined(Q_OS_UNIX)
# include <sys/poll.h>
# define AM_SIGNALS { SIGTERM, SIGINT, SIGPIPE, SIGHUP }
#else
# define AM_SIGNALS { SIGTERM, SIGINT }
#endif
QT_BEGIN_NAMESPACE_AM
#if defined(POLLRDHUP)
// ssh does not forward Ctrl+C, but we can detect a hangup condition on stdin
class HupThread : public QThread // clazy:exclude=missing-qobject-macro
{
public:
HupThread(QCoreApplication *parent)
: QThread(parent)
{
connect(parent, &QCoreApplication::aboutToQuit, this, [this]() {
if (isRunning()) {
terminate();
wait();
}
});
}
void run() override
{
while (true) {
struct pollfd pfd = { 0, POLLRDHUP, 0 };
int res = poll(&pfd, 1, -1);
if (res == 1 && pfd.revents & POLLHUP) {
kill(getpid(), SIGHUP);
return;
}
}
}
};
#endif // defined(POLLRDHUP)
void InterruptHandler::install(const std::function<void (int)> &handler)
{
static bool once = false;
if (!once) {
#if defined(POLLRDHUP)
(new HupThread(qApp))->start();
#endif
once = true;
}
// on Ctrl+C or SIGTERM -> stop the application
UnixSignalHandler::instance()->resetToDefault(AM_SIGNALS);
UnixSignalHandler::instance()->install(UnixSignalHandler::ForwardedToEventLoopHandler,
AM_SIGNALS, handler);
}
QT_END_NAMESPACE_AM
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