[Qt-interest] Error encountered while using void setStandardOutputProcess ( QProcess * destination )

[Usman Ajmal]

That's not working too. Now i am getting a message "QProcess: Destroyed
while process is still running."

I am actually sending memory image from one machine to another. When i do it
in simple shell it works fine.

Client's Shell:  netcat -l -p 9001 | dd of=mem.img
Server's Shell: dd if=/dev/mem | netcat 192.168.25.76 9001

where 192.168.25.76 is the IP address of client and 9001 is the port number.
I first run the piped command on client and then the server's. Image gets
transfer smoothly.

But now i am trying to provide a GUI for the server. Such that the user will
have to enter only ip address in the lineEdit. The client however runs in
shell as earlier. I used following code but its giving the said message
while not transferring anything.

....
QObject::connect(pushButton_send, SIGNAL(clicked()), MainWindow,
SLOT(sendImage()));
....
void MainWindow::sendImage()
{
    QObject *parent;
    QString command1 = "dd if=/dev/mem";
    QString command2 = "netcat ";
    QStringList arguments;
    arguments<<lineEdit_ipAddr->text()<<"9001";
    QProcess process1;
    QProcess *process2 = new QProcess(parent);
    process1.setStandardOutputProcess(process2);
    QCoreApplication::processEvents();
    process1.start(command1);
    process2->start(command2, arguments);
}

Any suggestions for me?


On Tue, Jul 21, 2009 at 6:20 PM, Chandru... <sekarwagmare at gmail.com> wrote:

>  initialize second QProcess as a pointer ..
> QProcess *process2;
>
> then in your code
> command2.append(lineEdit_ipAddr->text());  // its a bad way
>
> use QStringlist
> QStringList argument
> argument << lineEdit_ipAddr->text();
>
> void start <http://qprocess.html#start> ( const QString & program, const
> QStringList & arguments, OpenMode mode = ReadWrite )
>
>
>
>
>
> On Tue, Jul 21, 2009 at 6:29 PM, Usman Ajmal <uzmanajmal at gmail.com> wrote:
>
>> Hi,
>>
>> I am getting following error
>>
>> MainWindow.cpp:85: error: no matching function for call to
>> ‘QProcess::setStandardOutputProcess(QProcess&)’
>> /usr/include/QtCore/qprocess.h:113: note: candidates are: void
>> QProcess::setStandardOutputProcess(QProcess*)
>> make: *** [MainWindow.o] Error 1
>> for the following line of codes...Any idea why can't i access
>> setStandardOutputProcess
>>
>>     QString command1 = "dd if=/dev/mem";
>>     QString command2 = "netcat ";
>>     command2.append(lineEdit_ipAddr->text()); //This line edit contain ip
>> address to which i am sending the image of memory taken with the help of dd
>>     command2.append(" 9001");
>>
>>     QProcess process1;
>>     QProcess process2;
>>     process1.setStandardOutputProcess(process2);
>>     QCoreApplication::processEvents();
>>     process1.start(command1);
>>     process2.start(command2);
>>
>> Please tell me what am i missing.
>>
>> _______________________________________________
>> Qt-interest mailing list
>> Qt-interest at trolltech.com
>> http://lists.trolltech.com/mailman/listinfo/qt-interest
>>
>>
>
>
> --
> WAGMARE
>
>
>
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