Parsing output in Qt

Question

I need to parse the output of vol command only to get the id i.e only abcd-1234, that is being used in QProcess. Here is my code to get the Volume Serial Number:

QProcess process;
process.start("cmd /c vol C:");
process.waitForFinished(-1);
QByteArray out = process.readAllStandardOutput();
qDebug() << out;

Help me, thanks...

You could try a little harder – r_ahlskog May 29 '13 at 13:56 — r_ahlskog, May 29 '13 at 13:56

score 1 · Accepted Answer · answered May 29 '13 at 12:34

You can use the regular expression with QRegExp (http://qt-project.org/doc/qt-4.8/qregexp.html) to find the ID. The vol command will always return the same message. So, you can read the result line by line and search the matching line:

QRegExp rx( "The Volume Serial Number is (.+)\\."); // Match the line with the ID and store it.
if ( rx.exactMatch( line ) {
    QString id = rx.capturedTexts(1); // The first elt is the entire matching text.
    qDebug() << id;
}

Parsing output in Qt

1 Answers1