Fix leak of file descriptors in QTemporaryFile

Using setFileName in QFile::copy (introduced recently) has a nasty
side-effect of leaking file descriptors in QTemporaryFile. This happens
because the code assumes the file has been closed. In QTemporaryFile,
we need to explicitly call native file engine close.

Test case by Thiago. Bug report from Arora developers.

Reviewed-by: thiago

1 files changed, 9 insertions, 0 deletions

diff --git a/src/corelib/io/qtemporaryfile.cpp b/src/corelib/io/qtemporaryfile.cpp
index 4856353..6a9125c 100644
--- a/src/corelib/io/qtemporaryfile.cpp
+++ b/src/corelib/io/qtemporaryfile.cpp
@@ -294,6 +294,8 @@ public:
     QTemporaryFileEngine(const QString &file) : QFSFileEngine(file) { }
     ~QTemporaryFileEngine();
 
+    void setFileName(const QString &file);
+
     bool open(QIODevice::OpenMode flags);
     bool remove();
     bool close();
@@ -304,6 +306,13 @@ QTemporaryFileEngine::~QTemporaryFileEngine()
     QFSFileEngine::close();
 }
 
+void QTemporaryFileEngine::setFileName(const QString &file)
+{
+    // Really close the file, so we don't leak
+    QFSFileEngine::close();
+    QFSFileEngine::setFileName(file);
+}
+
 bool QTemporaryFileEngine::open(QIODevice::OpenMode openMode)
 {
     Q_D(QFSFileEngine);