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Type: Bug
Resolution: Done
Priority: P2: Important
Fix Version/s: 6.1.1, 6.2.0 Alpha
Affects Version/s: 5.11.1
Component/s: Core: I/O
Labels:
- unc-path
Environment:
tested on Windows 7 and Windows 10

Platform/s:

Windows
Commits:
ec9e85656339dbc9e6918a1369c981cece7bc97d (qt/qtbase/dev) 9d0be7b1a920cd9d7ae949bc3dc14774a439b3d0 (qt/qtbase/6.0) ad12c3c40b07079d875f48027eef0786acef7de0 (qt/qtbase/6.1)

QFile can successfully open a file to write with a UNC path. QSaveFile cannot open the same file. For example:

    QString path = QString( "\\\\drive\\dir\\myfile.txt" );
    qDebug() << "path=" << path;
    QFile f2( path );
    if ( f2.open( QIODevice::WriteOnly | QIODevice::Truncate | QIODevice::Text ) )
    {
        qDebug() << "QFile ok";
    }
    else
    {
        qDebug() << "QFile f.error()=" << f2.error();
        qDebug() << "QFile f.errorString()=" << f2.errorString();
    }

    QSaveFile f( path );
    if ( f.open( QIODevice::WriteOnly | QIODevice::Truncate | QIODevice::Text ) )
    {
        qDebug() << "QSaveFile ok";
    }
    else
    {
        qDebug() << "QSaveFile f.error()=" << f.error();
        qDebug() << "QSaveFile f.errorString()=" << f.errorString();
    }