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c++qtqt4qprocessqtcore

A Simple QProcess

Hi im trying to run a simple QProcess, here is my very basic code.

QDir("/home/brett/sweetback");
        QProcess process;
        process.start("mysqldump -uroot -ppass sweetassurfwear > sweetassurfwear.sql");
        process.waitForFinished(-1);

What is wrong with this? I have chaged the code to this 

QString program = "/usr/bin/mysqldump";
QStringList arguments;
arguments << "-uroot";
arguments << "-ppass";
arguments << "--routines";
arguments << "sweetassurfwear > sweetassurfwear.sql";
//All the other arguments

QProcess *myProcess = new QProcess(parent);
myProcess->start(program, arguments);

Im now getting the error

sweetgui2.cpp: In member function ‘void SweetGuiForm::on_buttonBox_accepted()’:
sweetgui2.cpp:88: error: no matching function for call to ‘QProcess::QProcess(<unresolved overloaded function type>)’
/usr/include/QtCore/qprocess.h:219: note: candidates are: QProcess::QProcess(const QProcess&)
/usr/include/QtCore/qprocess.h:129: note:                 QProcess::QProcess(QObject*)
make: *** [sweetgui2.o] Error 1

I have changed the line 

QProcess *myProcess = new QProcess(parent);
to
QProcess *myProcess = new QProcess(this);

It now compiles but im still not getting a dump file

Solution

  • Change the following line:

    arguments << "sweetassurfwear > sweetassurfwear.sql";

    to:

    arguments << "sweetassurfwear" << ">" << "sweetassurfwear.sql";

    You need to handle the different strings as separate arguments.