mirror of https://github.com/nextcloud/server
config: add a switch to control truncate before update
To avoid extra truncate on non WORM file systems, add a new config option `localstorage.unlink_on_truncate`, which defaults to false. The OC\Files\Storage\Local is update to respect that option. Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
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@ -1887,6 +1887,14 @@ $CONFIG = [
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*/
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'localstorage.umask' => 0022,
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/**
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* This options allows storage systems that don't allow to modify existing files
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* to overcome this limitation by removing the files before overwriting.
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*
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* Defaults to ``false``
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*/
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'localstorage.unlink_on_truncate' => false,
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/**
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* EXPERIMENTAL: option whether to include external storage in quota
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* calculation, defaults to false.
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@ -69,6 +69,8 @@ class Local extends \OC\Files\Storage\Common {
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private $defUMask;
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protected bool $unlinkOnTruncate;
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public function __construct($arguments) {
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if (!isset($arguments['datadir']) || !is_string($arguments['datadir'])) {
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throw new \InvalidArgumentException('No data directory set for local storage');
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@ -88,6 +90,9 @@ class Local extends \OC\Files\Storage\Common {
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$this->config = \OC::$server->get(IConfig::class);
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$this->mimeTypeDetector = \OC::$server->get(IMimeTypeDetector::class);
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$this->defUMask = $this->config->getSystemValue('localstorage.umask', 0022);
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// support Write-Once-Read-Many file systems
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$this->unlinkOnTruncate = $this->config->getSystemValue('localstorage.unlink_on_truncate', false);
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}
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public function __destruct() {
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@ -297,8 +302,9 @@ class Local extends \OC\Files\Storage\Common {
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public function file_put_contents($path, $data) {
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$oldMask = umask($this->defUMask);
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// support Write-Once-Read-Many filesystems
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$this->unlink($path);
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if ($this->unlinkOnTruncate) {
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$this->unlink($path);
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}
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$result = file_put_contents($this->getSourcePath($path), $data);
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umask($oldMask);
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return $result;
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@ -372,8 +378,9 @@ class Local extends \OC\Files\Storage\Common {
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return parent::copy($path1, $path2);
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} else {
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$oldMask = umask($this->defUMask);
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// support Write-Once-Read-Many filesystems
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$this->unlink($path2);
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if ($this->unlinkOnTruncate) {
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$this->unlink($path2);
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}
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$result = copy($this->getSourcePath($path1), $this->getSourcePath($path2));
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umask($oldMask);
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return $result;
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@ -382,8 +389,7 @@ class Local extends \OC\Files\Storage\Common {
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public function fopen($path, $mode) {
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$oldMask = umask($this->defUMask);
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if ($mode === 'w') {
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// support Write-Once-Read-Many filesystems
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if (($mode === 'w' || $mode === 'w+') && $this->unlinkOnTruncate) {
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$this->unlink($path);
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}
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$result = fopen($this->getSourcePath($path), $mode);
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