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, 12 insertions, 2 deletions

diff --git a/src/corelib/io/qfsfileengine_unix.cpp b/src/corelib/io/qfsfileengine_unix.cpp
index 5815d6bc9c..d071c85cb3 100644
--- a/src/corelib/io/qfsfileengine_unix.cpp
+++ b/src/corelib/io/qfsfileengine_unix.cpp
@@ -39,6 +39,7 @@
 
 #include "qplatformdefs.h"
 #include "private/qabstractfileengine_p.h"
+#include "private/qfiledevice_p.h"
 #include "private/qfsfileengine_p.h"
 #include "private/qcore_unix_p.h"
 #include "qfilesystementry_p.h"
@@ -107,7 +108,16 @@ static inline QString msgOpenDirectory()
 /*!
     \internal
 */
-bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode)
+bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode,
+                                      std::optional<QFile::Permissions> permissions)
+{
+    return nativeOpenImpl(openMode, permissions ? QtPrivate::toMode_t(*permissions) : 0666);
+}
+
+/*!
+    \internal
+*/
+bool QFSFileEnginePrivate::nativeOpenImpl(QIODevice::OpenMode openMode, mode_t mode)
 {
     Q_Q(QFSFileEngine);
 
@@ -118,7 +128,7 @@ bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode)
 
         // Try to open the file in unbuffered mode.
         do {
-            fd = QT_OPEN(fileEntry.nativeFilePath().constData(), flags, 0666);
+            fd = QT_OPEN(fileEntry.nativeFilePath().constData(), flags, mode);
         } while (fd == -1 && errno == EINTR);
 
         // On failure, return and report the error.