From 5e6ac2b8494c5a8f43dbd1460c427922570413ab Mon Sep 17 00:00:00 2001
From: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Date: Mon, 7 Mar 2022 10:15:53 +0100
Subject: [PATCH] files: remove destination file before copying new content
 (WORM)

---
 lib/private/Files/Storage/Local.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/private/Files/Storage/Local.php b/lib/private/Files/Storage/Local.php
index 1318b1c401d74..5e37aa77d2048 100644
--- a/lib/private/Files/Storage/Local.php
+++ b/lib/private/Files/Storage/Local.php
@@ -354,6 +354,8 @@ public function copy($path1, $path2) {
 			return parent::copy($path1, $path2);
 		} else {
 			$oldMask = umask(022);
+			// support Write-Once-Read-Many filesystems
+			$this->unlink($path2);
 			$result = copy($this->getSourcePath($path1), $this->getSourcePath($path2));
 			umask($oldMask);
 			return $result;