<![CDATA[QFile::copy() locks my xlsx file when copying it from app resources to a local directory]]>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?

]]>https://forum.qt.io/topic/135829/qfile-copy-locks-my-xlsx-file-when-copying-it-from-app-resources-to-a-local-directoryRSS for NodeTue, 19 May 2026 15:31:05 GMTThu, 14 Apr 2022 18:49:58 GMT60<![CDATA[Reply to QFile::copy() locks my xlsx file when copying it from app resources to a local directory on Thu, 14 Apr 2022 19:46:37 GMT]]>Ooh true, silly mistake then.. Thanks @SGaist!

]]>https://forum.qt.io/post/710498https://forum.qt.io/post/710498Thu, 14 Apr 2022 19:46:37 GMT<![CDATA[Reply to QFile::copy() locks my xlsx file when copying it from app resources to a local directory on Thu, 14 Apr 2022 19:08:38 GMT]]>The resource system is ready-only by design.

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

]]>https://forum.qt.io/post/710486https://forum.qt.io/post/710486Thu, 14 Apr 2022 19:08:38 GMT<![CDATA[Reply to QFile::copy() locks my xlsx file when copying it from app resources to a local directory on Thu, 14 Apr 2022 19:04:57 GMT]]>@SGaist You mean a resource file becomes read only when the app gets compiled?

]]>https://forum.qt.io/post/710484https://forum.qt.io/post/710484Thu, 14 Apr 2022 19:04:57 GMT<![CDATA[Reply to QFile::copy() locks my xlsx file when copying it from app resources to a local directory on Thu, 14 Apr 2022 19:02:50 GMT]]>Because it's copied from a read only file system.

]]>https://forum.qt.io/post/710483https://forum.qt.io/post/710483Thu, 14 Apr 2022 19:02:50 GMT<![CDATA[Reply to QFile::copy() locks my xlsx file when copying it from app resources to a local directory on Thu, 14 Apr 2022 19:02:01 GMT]]>@SGaist I just checked, it has ReadOnly permission.. why?

]]>https://forum.qt.io/post/710482https://forum.qt.io/post/710482Thu, 14 Apr 2022 19:02:01 GMT<![CDATA[Reply to QFile::copy() locks my xlsx file when copying it from app resources to a local directory on Thu, 14 Apr 2022 18:53:48 GMT]]>Hi,

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

]]>https://forum.qt.io/post/710479https://forum.qt.io/post/710479Thu, 14 Apr 2022 18:53:48 GMT