Check for failure in creating htaccessWorking testfile

core/setup/controller.php

@@ -60,8 +60,18 @@ class Controller {
 			$vulnerableToNullByte = true;
 		} 
 
+		$errors = array();
+
 		// Protect data directory here, so we can test if the protection is working
 		\OC_Setup::protectDataDirectory();
+		try {
+			$htaccessworking = \OC_Util::isHtAccessWorking();
+		} catch (\OC\HintException $e) {
+			$errors[] = array(
+				'error' => $e->getMessage(),
+				'hint' => $e->getHint()
+			);
+		}
 
 		return array(
 			'hasSQLite' => $hasSQLite,
@@ -71,9 +81,9 @@ class Controller {
 			'hasMSSQL' => $hasMSSQL,
 			'directory' => $datadir,
 			'secureRNG' => \OC_Util::secureRNGAvailable(),
-			'htaccessWorking' => \OC_Util::isHtAccessWorking(),
+			'htaccessWorking' => $htaccessWorking,
 			'vulnerableToNullByte' => $vulnerableToNullByte,
-			'errors' => array(),
+			'errors' => $errors,
 		);
 	}
 }

lib/util.php

@@ -689,9 +689,13 @@ class OC_Util {
 			return false;
 		}
 
-		$fp = @fopen($testfile, 'w');
-		@fwrite($fp, $testcontent);
-		@fclose($fp);
+		$fp = @fopen($testFile, 'w');
+		if (!$fp) {
+			throw new OC\HintException('Can\'t create test file to check for working .htaccess file.',
+				'Make sure it is possible for the webserver to write to '.$testFile);
+		}
+		fwrite($fp, $testContent);
+		fclose($fp);
 
 		// accessing the file via http
 		$url = OC_Helper::makeURLAbsolute(OC::$WEBROOT.'/data'.$fileName);
@@ -700,7 +704,7 @@ class OC_Util {
 		@fclose($fp);
 
 		// cleanup
-		@unlink($testfile);
+		@unlink($testFile);
 
 		// does it work ?
 		if($content==$testContent) {