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QFile::rename: error out if overwrite fails when changing case on case-insensitive filesystems

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The generic copy-and-remove fallback will first open the original file
with a different case, truncate it, and then remove the original file.
Leaving us with no file at all.

Task-number: QTBUG-132785
Pick-to: 6.8 6.5
Change-Id: Ia5a41d26c1d6d6bdc231c71acf15bd2ea496c715
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 2defca418788ab167fa1ce70e518c9250cb0909f)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Mårten Nordheim 2025-01-15 14:10:41 +01:00 committed by Qt Cherry-pick Bot
parent e958f05aec
commit ce820174ee
1 changed files with 7 additions and 0 deletions
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7
src/corelib/io/qfile.cpp
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@ -654,6 +654,13 @@ QFile::rename(const QString &newName)
return true;
}
// Engine was unable to rename and the fallback will delete the original file,
// so we have to back out here on case-insensitive file systems:
if (changingCase) {
d->setError(QFile::RenameError, d->fileEngine->errorString());
return false;
}
if (isSequential()) {
d->setError(QFile::RenameError, tr("Will not rename sequential file using block copy"));
return false;