From f5028cea2e66903fb8d80e312995a7252c90aace Mon Sep 17 00:00:00 2001
From: Kevin Perry <kperry@apple.com>
Date: Thu, 20 Mar 2025 19:09:03 -0700
Subject: [PATCH] rdar://138657153 (Writing NSData atomically defaults to using
 noFileProtection (class D))

---
 Sources/FoundationEssentials/Data/Data+Writing.swift | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Sources/FoundationEssentials/Data/Data+Writing.swift b/Sources/FoundationEssentials/Data/Data+Writing.swift
index 90ebd8628..fa05b2ca0 100644
--- a/Sources/FoundationEssentials/Data/Data+Writing.swift
+++ b/Sources/FoundationEssentials/Data/Data+Writing.swift
@@ -226,12 +226,14 @@ private func createProtectedTemporaryFile(at destinationPath: String, inPath: Pa
             }
         }
         
+        let updatedOptions = _NSDataWritingOptionsForRelocatedAtomicWrite(options, destinationPath)
+        
         let auxFile = temporaryDirectoryPath.appendingPathComponent(destinationPath.lastPathComponent)
         return try auxFile.withFileSystemRepresentation { auxFileFileSystemRep in
             guard let auxFileFileSystemRep else {
                 throw CocoaError(.fileWriteInvalidFileName)
             }
-            let fd = openFileDescriptorProtected(path: auxFileFileSystemRep, flags: O_CREAT | O_EXCL | O_RDWR, options: options)
+            let fd = openFileDescriptorProtected(path: auxFileFileSystemRep, flags: O_CREAT | O_EXCL | O_RDWR, options: updatedOptions)
             if fd >= 0 {
                 return (fd, auxFile, temporaryDirectoryPath)
             } else {