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/****************************************************************************
**
** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the $MODULE$ of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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: http://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: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qpopen.h"
QPopen::QPopen()
{
}
bool QPopen::init(const char *command, const char* /* mode */)
{
SECURITY_ATTRIBUTES attributes;
attributes.nLength = sizeof(SECURITY_ATTRIBUTES);
attributes.bInheritHandle = TRUE;
attributes.lpSecurityDescriptor = NULL;
if (! CreatePipe(&childStdOutR, &childStdOutW, &attributes, 0)) {
return false;
}
// Ensure that the read handle to the child process's pipe for STDOUT is not inherited.
SetHandleInformation(childStdOutR, HANDLE_FLAG_INHERIT, 0);
// Create a pipe for the child process's STDIN.
if (! CreatePipe(&childStdInR, &childStdInW, &attributes, 0)) {
return false;
}
// Ensure that the write handle to the child process's pipe for STDIN is not inherited.
SetHandleInformation(childStdInW, HANDLE_FLAG_INHERIT, 0);
TCHAR *szCmdLine = new TCHAR[strlen(command)+1];
strcpy(szCmdLine, command);
// Set up members of the PROCESS_INFORMATION structure.
ZeroMemory(&processInfo, sizeof(PROCESS_INFORMATION));
// Set up members of the STARTUPINFO structure.
ZeroMemory(&siStartInfo, sizeof(STARTUPINFO));
siStartInfo.cb = sizeof(STARTUPINFO);
siStartInfo.hStdError = childStdOutW;
siStartInfo.hStdOutput = childStdOutW;
siStartInfo.hStdInput = childStdInR;
siStartInfo.dwFlags |= STARTF_USESTDHANDLES;
// Create the child process.
bool success = CreateProcess(NULL,
szCmdLine, // command line
NULL, // process security attributes
NULL, // primary thread security attributes
TRUE, // handles are inherited
0, // creation flags
NULL, // use parent's environment
NULL, // use parent's current directory
&siStartInfo, // STARTUPINFO pointer
&processInfo); // receives PROCESS_INFORMATION
delete szCmdLine;
return success;
}
QPopen::~QPopen()
{
CloseHandle(processInfo.hProcess);
CloseHandle(processInfo.hThread);
CloseHandle(childStdInR);
CloseHandle(childStdInW);
CloseHandle(childStdOutR);
CloseHandle(childStdOutW);
}
int QPopen::fwrite(char* buffer, int maxBytes)
{
DWORD bytesWritten;
bool success = WriteFile(childStdInW, buffer, maxBytes, &bytesWritten, NULL);
if (success) {
return bytesWritten;
}
return 0;
}
int QPopen::fread(char* buffer, int maxBytes)
{
DWORD bytesRead;
if (!CloseHandle(childStdOutW))
return 0;
bool success = ReadFile(childStdOutR, buffer, maxBytes, &bytesRead, NULL);
if (success)
return bytesRead;
return 0;
}
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