From 5fe9daed726c06900c3cd41a739460057bec6dc3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tina=20M=C3=BCller?= <cpan2@tinita.de>
Date: Wed, 29 Jan 2025 21:17:28 +0100
Subject: [PATCH] Use 3-arg form of open in LoadFile

Fixes https://github.com/ingydotnet/yaml-libyaml-pm/issues/120

Otherwise `$filename = ">file.yaml"; LoadFile($filename)` will truncate a file.

One should check untrusted filenames in any case, though.
---
 lib/YAML/XS.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/YAML/XS.pm b/lib/YAML/XS.pm
index 66ff5ba..e8df694 100644
--- a/lib/YAML/XS.pm
+++ b/lib/YAML/XS.pm
@@ -54,7 +54,7 @@ sub LoadFile {
         $IN = $filename;
     }
     else {
-        open $IN, $filename
+        open $IN, '<', $filename
           or die "Can't open '$filename' for input:\n$!";
     }
     return YAML::XS::LibYAML::Load(do { local $/; local $_ = <$IN> });