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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "processutils.h"
#ifdef Q_OS_WIN
#ifdef QTCREATOR_PCH_H
#define CALLBACK WINAPI
#endif
#include <qt_windows.h>
#else
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#endif
namespace Utils {
QIODevice::OpenMode ProcessStartHandler::openMode() const
{
if (m_processMode == ProcessMode::Writer)
return QIODevice::ReadWrite; // some writers also read data
if (m_writeData.isEmpty())
return QIODevice::ReadOnly; // only reading
return QIODevice::ReadWrite; // initial write and then reading (close the write channel)
}
void ProcessStartHandler::handleProcessStart()
{
if (m_processMode == ProcessMode::Writer)
return;
if (m_writeData.isEmpty())
m_process->closeWriteChannel();
}
void ProcessStartHandler::handleProcessStarted()
{
if (!m_writeData.isEmpty()) {
m_process->write(m_writeData);
m_writeData = {};
if (m_processMode == ProcessMode::Reader)
m_process->closeWriteChannel();
}
}
void ProcessStartHandler::setBelowNormalPriority()
{
#ifdef Q_OS_WIN
m_process->setCreateProcessArgumentsModifier(
[](QProcess::CreateProcessArguments *args) {
args->flags |= BELOW_NORMAL_PRIORITY_CLASS;
});
#endif // Q_OS_WIN
}
void ProcessStartHandler::setNativeArguments(const QString &arguments)
{
#ifdef Q_OS_WIN
if (!arguments.isEmpty())
m_process->setNativeArguments(arguments);
#else
Q_UNUSED(arguments)
#endif // Q_OS_WIN
}
#ifdef Q_OS_WIN
static BOOL sendMessage(UINT message, HWND hwnd, LPARAM lParam)
{
DWORD dwProcessID;
GetWindowThreadProcessId(hwnd, &dwProcessID);
if ((DWORD)lParam == dwProcessID) {
SendNotifyMessage(hwnd, message, 0, 0);
return FALSE;
}
return TRUE;
}
BOOL CALLBACK sendShutDownMessageToAllWindowsOfProcess_enumWnd(HWND hwnd, LPARAM lParam)
{
static UINT uiShutDownMessage = RegisterWindowMessage(L"qtcctrlcstub_shutdown");
return sendMessage(uiShutDownMessage, hwnd, lParam);
}
BOOL CALLBACK sendInterruptMessageToAllWindowsOfProcess_enumWnd(HWND hwnd, LPARAM lParam)
{
static UINT uiInterruptMessage = RegisterWindowMessage(L"qtcctrlcstub_interrupt");
return sendMessage(uiInterruptMessage, hwnd, lParam);
}
#endif
ProcessHelper::ProcessHelper(QObject *parent)
: QProcess(parent), m_processStartHandler(this)
{
#if defined(Q_OS_UNIX)
setChildProcessModifier([this] { setupChildProcess_impl(); });
#endif
}
void ProcessHelper::setUseCtrlCStub(bool enabled)
{
m_useCtrlCStub = enabled;
}
void ProcessHelper::terminateProcess()
{
#ifdef Q_OS_WIN
if (m_useCtrlCStub)
EnumWindows(sendShutDownMessageToAllWindowsOfProcess_enumWnd, processId());
else
terminate();
#else
terminate();
#endif
}
void ProcessHelper::terminateProcess(QProcess *process)
{
ProcessHelper *helper = qobject_cast<ProcessHelper *>(process);
if (helper)
helper->terminateProcess();
else
process->terminate();
}
void ProcessHelper::interruptPid(qint64 pid)
{
#ifdef Q_OS_WIN
EnumWindows(sendInterruptMessageToAllWindowsOfProcess_enumWnd, pid);
#else
::kill(pid, SIGINT);
#endif
}
void ProcessHelper::interruptProcess(QProcess *process)
{
ProcessHelper *helper = qobject_cast<ProcessHelper *>(process);
if (helper && helper->m_useCtrlCStub)
ProcessHelper::interruptPid(process->processId());
}
void ProcessHelper::setupChildProcess_impl()
{
#if defined Q_OS_UNIX
// nice value range is -20 to +19 where -20 is highest, 0 default and +19 is lowest
if (m_lowPriority) {
errno = 0;
if (::nice(5) == -1 && errno != 0)
perror("Failed to set nice value");
}
// Disable terminal by becoming a session leader.
if (m_unixTerminalDisabled)
setsid();
#endif
}
} // namespace Utils
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