From 50f77222964ed3d01dcb53f803ea2d511656a9dc Mon Sep 17 00:00:00 2001
From: Kathryn Baldauf <k_baldauf@apple.com>
Date: Mon, 27 Jul 2026 11:42:07 -0700
Subject: [PATCH] Mask high mode bits in archive reader (#816)

This PR masks the high mode bits when setting file attributes for
consistency with mode at file creation.

Signed-off-by: Kathryn Baldauf <k_baldauf@apple.com>
---
 Sources/ContainerizationArchive/ArchiveReader.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sources/ContainerizationArchive/ArchiveReader.swift b/Sources/ContainerizationArchive/ArchiveReader.swift
index 0477d8e4..3c291d1a 100644
--- a/Sources/ContainerizationArchive/ArchiveReader.swift
+++ b/Sources/ContainerizationArchive/ArchiveReader.swift
@@ -398,7 +398,7 @@ extension ArchiveReader {
     }
 
     private func setFileAttributes(fd: Int32, entry: WriteEntry) {
-        fchmod(fd, entry.permissions)
+        fchmod(fd, entry.permissions & 0o777)
         if let owner = entry.owner, let group = entry.group {
             fchown(fd, owner, group)
         }