Merge pull request #41053 from nextcloud/bug/smb/in-place-case-rename

fix(files_external): on case insensitive system, block case change

1 files changed, 19 insertions, 0 deletions

diff --git a/apps/files_external/lib/Lib/Storage/SMB.php b/apps/files_external/lib/Lib/Storage/SMB.php
index c3ccc106239..2c0a412d341 100644
--- a/apps/files_external/lib/Lib/Storage/SMB.php
+++ b/apps/files_external/lib/Lib/Storage/SMB.php
@@ -93,6 +93,8 @@ class SMB extends Common implements INotifyStorage {
 	/** @var bool */
 	protected $showHidden;
 
+	private bool $caseSensitive;
+
 	/** @var bool */
 	protected $checkAcl;
 
@@ -139,6 +141,7 @@ class SMB extends Common implements INotifyStorage {
 		$this->root = rtrim($this->root, '/') . '/';
 
 		$this->showHidden = isset($params['show_hidden']) && $params['show_hidden'];
+		$this->caseSensitive = (bool) ($params['case_sensitive'] ?? true);
 		$this->checkAcl = isset($params['check_acl']) && $params['check_acl'];
 
 		$this->statCache = new CappedMemoryCache();
@@ -325,6 +328,12 @@ class SMB extends Common implements INotifyStorage {
 		if ($this->isRootDir($source) || $this->isRootDir($target)) {
 			return false;
 		}
+		if ($this->caseSensitive === false
+			&& mb_strtolower($target) === mb_strtolower($source)
+		) {
+			// Forbid changing case only on case-insensitive file system
+			return false;
+		}
 
 		$absoluteSource = $this->buildPath($source);
 		$absoluteTarget = $this->buildPath($target);
@@ -674,6 +683,16 @@ class SMB extends Common implements INotifyStorage {
 
 	public function file_exists($path) {
 		try {
+			if ($this->caseSensitive === false) {
+				$filename = basename($path);
+				$siblings = $this->getDirectoryContent(dirname($this->buildPath($path)));
+				foreach ($siblings as $sibling) {
+					if ($sibling['name'] === $filename) {
+						return true;
+					}
+				}
+				return false;
+			}
 			$this->getFileInfo($path);
 			return true;
 		} catch (\OCP\Files\NotFoundException $e) {