QFile::copy() locks my xlsx file when copying it from app resources to a local directory

[SamurayH]

Hi,
I've encouraged a weird behavior of QFile::copy when trying to copy an xlsx document from my app's resources into a local folder. The function succeeds but the new document becomes locked and can't be edited. Then I tried to do a "manual" copy, the problem disappeared!

// This locks the copied document
// QFile::copy(":/Resources/doc/document.xlsx", documentPath);

// "manual" copy doesn't!
QFile orginalDoc(":/Resources/doc/document.xlsx");
orginalDoc.open(QIODevice::ReadOnly);

QFile copyDoc(documentPath);
copyDoc.open(QIODevice::WriteOnly);
copyDoc.write(orginal.readAll());
copyDoc.close();

So I think there's an issue with QFile::copy, or it maybe a silly mistake, any ideas?

[SGaist]

Hi,

Did you check the permissions of the file after the copy happens ?

[SamurayH]

@SGaist I just checked, it has ReadOnly permission.. why?

[SGaist]

Because it's copied from a read only file system.

[SamurayH]

@SGaist You mean a resource file becomes read only when the app gets compiled?

[SGaist]

The resource system is ready-only by design.

You can use QFile::setPermissions to make it writable.

[SamurayH]

Ooh true, silly mistake then.. Thanks @SGaist!