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

[Usman Ajmal]

Btw i am getting unknown error when i use process1.error( ) or
process2->error( ). They both output 5 which is 'unknown error'

On Tue, Jul 21, 2009 at 11:01 PM, Usman Ajmal <uzmanajmal at gmail.com> wrote:

> 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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