QProcess does not work in service

[yasjera]

Hi all,

I tried starting my QProcess in my service but it doesn't work, although it works nicely in an other program without service.
I want by my service to execute an other program.
there is the same code i userd in the service and the simple program :

if(m_pProcess == NULL)
	{	
		m_pProcess = new QProcess;
		m_pProcess->setEnvironment( QProcess::systemEnvironment() );
		m_pProcess->setProcessChannelMode( QProcess::MergedChannels );
 
	}
 
	QStringList args;
	if(m_pProcess)
	{
		bool bValueStart = m_pProcess->startDetached("myProgram.exe");
		m_pProcess->waitForStarted();
		if(bValueStart)
		{
			qDebug()<< "OK";
			return OK;
 
		}
		else
		{
			qDebug()<< "ERR";
			return ERR;
		}
 
	}

if(m_pProcess == NULL)
	{	
		m_pProcess = new QProcess;
		m_pProcess->setEnvironment( QProcess::systemEnvironment() );
		m_pProcess->setProcessChannelMode( QProcess::MergedChannels );

	}

	QStringList args;
	if(m_pProcess)
	{
		bool bValueStart = m_pProcess->startDetached("myProgram.exe");
		m_pProcess->waitForStarted();
		if(bValueStart)
		{
			qDebug()<< "OK";
			return OK;

		}
		else
		{
			qDebug()<< "ERR";
			return ERR;
		}

	}

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[Coder5546]

Try this:

QString filename = "myProgram.exe";
 
    if(QSysInfo::windowsVersion() < QSysInfo::WV_VISTA) {
        return QProcess::startDetached(filename);
    } else {
        int result = (int)::ShellExecuteA(0, "open", filename.toUtf8().constData(), 0, 0, SW_SHOWNORMAL);
        if (result != ERROR_FILE_NOT_FOUND || ERROR_PATH_NOT_FOUND || ERROR_BAD_FORMAT || SE_ERR_ASSOCINCOMPLETE || SE_ERR_DDEFAIL || SE_ERR_FNF|| SE_ERR_OOM || SE_ERR_PNF || SE_ERR_SHARE) {
            if (SE_ERR_ACCESSDENIED == result) {
                return (int)::ShellExecuteA(0, "runas", filename.toUtf8().constData(), 0, 0, SW_SHOWNORMAL) > 32;
            }
        } else {
            Tools::showMessageBox(QObject::tr("App"), QObject::trUtf8("Problem with run %1").arg(filename));
        }
        return result > 32;
    }
}

QString filename = "myProgram.exe";

    if(QSysInfo::windowsVersion() < QSysInfo::WV_VISTA) {
        return QProcess::startDetached(filename);
    } else {
        int result = (int)::ShellExecuteA(0, "open", filename.toUtf8().constData(), 0, 0, SW_SHOWNORMAL);
        if (result != ERROR_FILE_NOT_FOUND || ERROR_PATH_NOT_FOUND || ERROR_BAD_FORMAT || SE_ERR_ASSOCINCOMPLETE || SE_ERR_DDEFAIL || SE_ERR_FNF|| SE_ERR_OOM || SE_ERR_PNF || SE_ERR_SHARE) {
            if (SE_ERR_ACCESSDENIED == result) {
                return (int)::ShellExecuteA(0, "runas", filename.toUtf8().constData(), 0, 0, SW_SHOWNORMAL) > 32;
            }
        } else {
            Tools::showMessageBox(QObject::tr("App"), QObject::trUtf8("Problem with run %1").arg(filename));
        }
        return result > 32;
    }
}

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You should create a manifest file, sometimes you need administrator privileges...
eg http://msdn.microsoft.com/en-us/libr...=vs.85%29.aspx

Regards

[wysota]

Hi all,

I tried starting my QProcess in my service but it doesn't work, although it works nicely in an other program without service.
I want by my service to execute an other program.

Don't use relative paths to the program.

[hassinoss]

Thanx for your replies , i had the same problem , but what i want more is if there is any way to do it in order to use it in other platforms not just windows

[wysota]

Yes. Don't use relative paths as the current working directory of a manually started program is different to when it is ran as a service.

[Coder5546]

#ifdef Q_OS_UNIX
     QString filename = "./MyApp";
 #elif defined Q_OS_MAC
    QString filename = "MyApp.dmg"; // I'm not sure, I not using Mac Os
#else
     QString filename = "MyApp.exe";
#endif
 
#ifdef Q_OS_WIN
    if(QSysInfo::windowsVersion() < QSysInfo::WV_VISTA) {
        return QProcess::startDetached(filename); //... Windows 2000, XP
    } else {  // Windows Vista, 7, 8
        int result = (int)::ShellExecuteA(0, "open", filename.toUtf8().constData(), 0, 0, SW_SHOWNORMAL);
        if (SE_ERR_ACCESSDENIED == result)
        {
            return (int)::ShellExecuteA(0, "runas", filename.toUtf8().constData(), 0, 0, SW_SHOWNORMAL) > 32;
        }else {
            qDebug() << "Problem with run application";
        }
        return result > 32;
    }
#else
    return QProcess::startDetached(filename); //Linux, Mac
#endif

#ifdef Q_OS_UNIX
     QString filename = "./MyApp";
 #elif defined Q_OS_MAC
    QString filename = "MyApp.dmg"; // I'm not sure, I not using Mac Os
#else
     QString filename = "MyApp.exe";
#endif

#ifdef Q_OS_WIN
    if(QSysInfo::windowsVersion() < QSysInfo::WV_VISTA) {
        return QProcess::startDetached(filename); //... Windows 2000, XP
    } else {  // Windows Vista, 7, 8
        int result = (int)::ShellExecuteA(0, "open", filename.toUtf8().constData(), 0, 0, SW_SHOWNORMAL);
        if (SE_ERR_ACCESSDENIED == result)
        {
            return (int)::ShellExecuteA(0, "runas", filename.toUtf8().constData(), 0, 0, SW_SHOWNORMAL) > 32;
        }else {
            qDebug() << "Problem with run application";
        }
        return result > 32;
    }
#else
    return QProcess::startDetached(filename); //Linux, Mac
#endif

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