From b05605cc1c1fc62b337aa0b82dd34ee5f0fe0332 Mon Sep 17 00:00:00 2001
From: Daniele Nicolodi <daniele@grinta.net>
Date: Thu, 18 Jun 2026 21:19:38 +0200
Subject: [PATCH 1/2] gh-151669: Normalize symlink targets in
 tarfile.TarFile.gettarinfo()

This applies a normalization complementary to the one added to
tarfile.TarFile.extract() in gh-138309.
---
 Lib/tarfile.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/tarfile.py b/Lib/tarfile.py
index a293a0492472749..90e3443a98d50f1 100644
--- a/Lib/tarfile.py
+++ b/Lib/tarfile.py
@@ -2227,7 +2227,7 @@ def gettarinfo(self, name=None, arcname=None, fileobj=None):
             type = FIFOTYPE
         elif stat.S_ISLNK(stmd):
             type = SYMTYPE
-            linkname = os.readlink(name)
+            linkname = os.readlink(name).replace(os.sep, "/")
         elif stat.S_ISCHR(stmd):
             type = CHRTYPE
         elif stat.S_ISBLK(stmd):

From 52b2be0ff507b3ee5a7cd4846d62bdfe76eeb4d6 Mon Sep 17 00:00:00 2001
From: Daniele Nicolodi <daniele@grinta.net>
Date: Wed, 24 Jun 2026 23:34:30 +0200
Subject: [PATCH 2/2] Add NEWS and whatsnew entries

---
 Doc/whatsnew/3.15.rst                                          | 3 +++
 .../Library/2026-06-24-23-28-42.gh-issue-151669.tPUavQ.rst     | 3 +++
 2 files changed, 6 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Library/2026-06-24-23-28-42.gh-issue-151669.tPUavQ.rst

diff --git a/Doc/whatsnew/3.15.rst b/Doc/whatsnew/3.15.rst
index db6903da9f63444..c4a2be12289d1c1 100644
--- a/Doc/whatsnew/3.15.rst
+++ b/Doc/whatsnew/3.15.rst
@@ -1541,6 +1541,9 @@ tarfile
   now replace slashes with backslashes in symlink targets on Windows to prevent
   creation of corrupted links.
   (Contributed by Christoph Walcher in :gh:`57911`.)
+* :func:`~tarfile.TarFile.gettarinfo` now replaces backslashes with slashes in
+  symlink targets on Windows to conform to the tar format standard. (Contributed
+  by Daniele Nicolodi in :gh:`151669`.)
 
 
 threading
diff --git a/Misc/NEWS.d/next/Library/2026-06-24-23-28-42.gh-issue-151669.tPUavQ.rst b/Misc/NEWS.d/next/Library/2026-06-24-23-28-42.gh-issue-151669.tPUavQ.rst
new file mode 100644
index 000000000000000..d8e4850ba94e140
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-06-24-23-28-42.gh-issue-151669.tPUavQ.rst
@@ -0,0 +1,3 @@
+On Windows, when populating tar archives from filesystem content, to
+conform to the tar format standard, backslashes in symlink targets are
+be replaced by slashes.