QAbstractFileEngine: Add permission argument to open()

The new argument allows atomic creation of files with non-default
permissions.

Task-number: QTBUG-79750
Change-Id: I4c49455b41f924ba87148302c8d0f77f5de0832b
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/corelib/io/qabstractfileengine.cpp b/src/corelib/io/qabstractfileengine.cpp
index 063cee1071..d6b2b6a10e 100644
--- a/src/corelib/io/qabstractfileengine.cpp
+++ b/src/corelib/io/qabstractfileengine.cpp
@@ -383,10 +383,16 @@ QAbstractFileEngine::~QAbstractFileEngine()
 
     The \a mode is an OR combination of QIODevice::OpenMode and
     QIODevice::HandlingMode values.
+
+    If the file is created as a result of this call, its permissions are
+    set according to \a permissision. Null value means an implementation-
+    specific default.
 */
-bool QAbstractFileEngine::open(QIODevice::OpenMode openMode)
+bool QAbstractFileEngine::open(QIODevice::OpenMode openMode,
+                               std::optional<QFile::Permissions> permissions)
 {
     Q_UNUSED(openMode);
+    Q_UNUSED(permissions);
     return false;
 }