From 6529a07ff5b901e10d2ab0011cd5a9e7cb4ee5a5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Peter=20Valdemar=20M=C3=B8rch?= <peter@morch.com>
Date: Thu, 27 Feb 2025 12:57:03 +0100
Subject: [PATCH] Handle UTF-8 decoding errors gracefully

create-example.sh now touches a new file with a non-UTF-8 filename
that would cause it to fail without the patch to
btrfs-snapshots-diff.py but I cannot fix the tests because of #23.
---
 btrfs-snapshots-diff.py | 2 +-
 create-example.sh       | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/btrfs-snapshots-diff.py b/btrfs-snapshots-diff.py
index 8cd1ce4..93b81f1 100755
--- a/btrfs-snapshots-diff.py
+++ b/btrfs-snapshots-diff.py
@@ -106,7 +106,7 @@ def _tlv_get_string(self, attr_type, index):
         (ret,) = unpack(
             f'<{l_attr}s', self.stream[index + self.l_tlv : index + self.l_tlv + l_attr]
         )
-        return index + self.l_tlv + l_attr, ret.decode('utf8')
+        return index + self.l_tlv + l_attr, ret.decode('utf8', errors='replace')
 
     def _tlv_get_u64(self, attr_type, index):
         attr, l_attr = unpack('<HH', self.stream[index : index + self.l_tlv])
diff --git a/create-example.sh b/create-example.sh
index 8b6d03f..d8c9379 100755
--- a/create-example.sh
+++ b/create-example.sh
@@ -27,6 +27,7 @@ btrfs filesystem sync $old
 
 cd $test_sub
 touch file
+touch weird-file-name-$'\342'%99$'\245'.txt
 mkdir dir
 mkfifo fifo
 ln file hardlink