Add a comment about WriteOnly.
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@ -137,6 +137,7 @@ bool ExternalCommandHelper::WriteFstab(const QByteArray& fileContents)
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QString fstabPath = QStringLiteral("/etc/fstab");
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QFile fstabFile(fstabPath);
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// WriteOnly implies O_TRUNC
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auto flags = QIODevice::WriteOnly | QIODevice::Unbuffered;
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if (!fstabFile.open(flags)) {
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qCritical() << xi18n("Could not open file <filename>%1</filename> for writing.", fstabPath);
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