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Merge pull request #11303 from owncloud/addFilelockToConfig 

Add flock to config
This commit is contained in:
Lukas Reschke 2014-10-01 10:43:18 +02:00
parent 5beeb923e6 68cf6681e5
commit cbecd62287
3 changed files with 182 additions and 124 deletions
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134
lib/private/config.php
View File

@ -1,37 +1,12 @@
<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @author Jakob Sack
* @copyright 2012 Frank Karlitschek frank@owncloud.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
*
* An example of config.php
*
* <?php
* $CONFIG = array(
* "database" => "mysql",
* "firstrun" => false,
* "pi" => 3.14
* );
* ?>
*
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC;
@ -41,26 +16,45 @@ namespace OC;
* configuration file of ownCloud.
*/
class Config {
// associative array key => value
/** @var array Associative array ($key => $value) */
protected $cache = array();
/** @var string */
protected $configDir;
protected $configFilename;
/** @var string */
protected $configFilePath;
/** @var string */
protected $configFileName;
/** @var bool */
protected $debugMode;
/**
* @param string $configDir path to the config dir, needs to end with '/'
* @param string $configDir Path to the config dir, needs to end with '/'
* @param string $fileName (Optional) Name of the config file. Defaults to config.php
*/
public function __construct($configDir) {
public function __construct($configDir, $fileName = 'config.php') {
$this->configDir = $configDir;
$this->configFilename = $this->configDir.'config.php';
$this->configFilePath = $this->configDir.$fileName;
$this->configFileName = $fileName;
$this->readData();
$this->setDebugMode(defined('DEBUG') && DEBUG);
$this->debugMode = (defined('DEBUG') && DEBUG);
}
public function setDebugMode($enable) {
$this->debugMode = $enable;
/**
* Enables or disables the debug mode
* @param bool $state True to enable, false to disable
*/
public function setDebugMode($state) {
$this->debugMode = $state;
$this->writeData();
$this->cache;
}
/**
* Returns whether the debug mode is enabled or disabled
* @return bool True when enabled, false otherwise
*/
public function isDebugMode() {
return $this->debugMode;
}
/**
@ -128,27 +122,43 @@ class Config {
* Loads the config file
*
* Reads the config file and saves it to the cache
*
* @throws \Exception If no lock could be acquired or the config file has not been found
*/
private function readData() {
// Default config
$configFiles = array($this->configFilename);
// Add all files in the config dir ending with config.php
$extra = glob($this->configDir.'*.config.php');
// Default config should always get loaded
$configFiles = array($this->configFilePath);
// Add all files in the config dir ending with the same file name
$extra = glob($this->configDir.'*.'.$this->configFileName);
if (is_array($extra)) {
natsort($extra);
$configFiles = array_merge($configFiles, $extra);
}
// Include file and merge config
foreach ($configFiles as $file) {
if (!file_exists($file)) {
if(!@touch($file) && $file === $this->configFilePath) {
// Writing to the main config might not be possible, e.g. if the wrong
// permissions are set (likely on a new installation)
continue;
}
$filePointer = fopen($file, 'r');
// Try to acquire a file lock
if(!flock($filePointer, LOCK_SH)) {
throw new \Exception(sprintf('Could not acquire a shared lock on the config file %s', $file));
}
unset($CONFIG);
// ignore errors on include, this can happen when doing a fresh install
@include $file;
if (isset($CONFIG) && is_array($CONFIG)) {
include $file;
if(isset($CONFIG) && is_array($CONFIG)) {
$this->cache = array_merge($this->cache, $CONFIG);
}
// Close the file pointer and release the lock
flock($filePointer, LOCK_UN);
fclose($filePointer);
}
}
@ -157,6 +167,8 @@ class Config {
*
* Saves the config to the config file.
*
* @throws HintException If the config file cannot be written to
* @throws \Exception If no file lock can be acquired
*/
private function writeData() {
// Create a php file ...
@ -168,18 +180,34 @@ class Config {
$content .= var_export($this->cache, true);
$content .= ";\n";
// Write the file
$result = @file_put_contents($this->configFilename, $content);
if (!$result) {
$defaults = new \OC_Defaults;
touch ($this->configFilePath);
$filePointer = fopen($this->configFilePath, 'r+');
// Prevent others not to read the config
chmod($this->configFilePath, 0640);
// File does not exist, this can happen when doing a fresh install
if(!is_resource ($filePointer)) {
$url = \OC_Helper::linkToDocs('admin-dir_permissions');
throw new HintException(
"Can't write into config directory!",
'This can usually be fixed by '
.'<a href="' . $url . '" target="_blank">giving the webserver write access to the config directory</a>.');
.'<a href="' . $url . '" target="_blank">giving the webserver write access to the config directory</a>.');
}
// Prevent others not to read the config
@chmod($this->configFilename, 0640);
// Try to acquire a file lock
if(!flock($filePointer, LOCK_EX)) {
throw new \Exception(sprintf('Could not acquire an exclusive lock on the config file %s', $this->configFilePath));
}
// Write the config and release the lock
ftruncate ($filePointer, 0);
fwrite($filePointer, $content);
fflush($filePointer);
flock($filePointer, LOCK_UN);
fclose($filePointer);
// Clear the opcode cache
\OC_Util::clearOpcodeCache();
}
}

38
lib/private/legacy/config.php
View File

@ -6,32 +6,9 @@
* @author Jakob Sack
* @copyright 2012 Frank Karlitschek frank@owncloud.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
*
* An example of config.php
*
* <?php
* $CONFIG = array(
* "database" => "mysql",
* "firstrun" => false,
* "pi" => 3.14
* );
* ?>
*
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
/**
@ -42,11 +19,13 @@
*/
class OC_Config {
/**
* @var \OC\Config
*/
/** @var \OC\Config */
public static $object;
/**
* Returns the config instance
* @return \OC\Config
*/
public static function getObject() {
return self::$object;
}
@ -92,7 +71,6 @@ class OC_Config {
* @param string $key key
*
* This function removes a key from the config.php.
*
*/
public static function deleteKey($key) {
self::$object->deleteKey($key);

134
tests/lib/config.php
View File

@ -7,82 +7,134 @@
*/
class Test_Config extends PHPUnit_Framework_TestCase {
const CONFIG_FILE = 'static://config.php';
const CONFIG_DIR = 'static://';
const TESTCONTENT = '<?php $CONFIG=array("foo"=>"bar");';
const TESTCONTENT = '<?php $CONFIG=array("foo"=>"bar", "beers" => array("Appenzeller", "Guinness", "Kölsch"), "alcohol_free" => false);';
/**
* @var \OC\Config
*/
/** @var array */
private $initialConfig = array('foo' => 'bar', 'beers' => array('Appenzeller', 'Guinness', 'Kölsch'), 'alcohol_free' => false);
/** @var string */
private $configFile;
/** @var \OC\Config */
private $config;
/** @var string */
private $randomTmpDir;
function setUp() {
file_put_contents(self::CONFIG_FILE, self::TESTCONTENT);
$this->config = new OC\Config(self::CONFIG_DIR);
$this->randomTmpDir = \OC_Helper::tmpFolder();
$this->configFile = $this->randomTmpDir.'testconfig.php';
file_put_contents($this->configFile, self::TESTCONTENT);
$this->config = new OC\Config($this->randomTmpDir, 'testconfig.php');
}
public function testReadData() {
$config = new OC\Config('/non-existing');
$this->assertAttributeEquals(array(), 'cache', $config);
$this->assertAttributeEquals(array('foo' => 'bar'), 'cache', $this->config);
public function tearDown() {
unlink($this->configFile);
}
public function testGetKeys() {
$this->assertEquals(array('foo'), $this->config->getKeys());
$expectedConfig = array('foo', 'beers', 'alcohol_free');
$this->assertSame($expectedConfig, $this->config->getKeys());
}
public function testGetValue() {
$this->assertEquals('bar', $this->config->getValue('foo'));
$this->assertEquals(null, $this->config->getValue('bar'));
$this->assertEquals('moo', $this->config->getValue('bar', 'moo'));
$this->assertSame('bar', $this->config->getValue('foo'));
$this->assertSame(null, $this->config->getValue('bar'));
$this->assertSame('moo', $this->config->getValue('bar', 'moo'));
$this->assertSame(false, $this->config->getValue('alcohol_free', 'someBogusValue'));
$this->assertSame(array('Appenzeller', 'Guinness', 'Kölsch'), $this->config->getValue('beers', 'someBogusValue'));
$this->assertSame(array('Appenzeller', 'Guinness', 'Kölsch'), $this->config->getValue('beers'));
}
public function testSetValue() {
$this->config->setDebugMode(false);
$this->config->setValue('foo', 'moo');
$this->assertAttributeEquals(array('foo' => 'moo'), 'cache', $this->config);
$content = file_get_contents(self::CONFIG_FILE);
$expectedConfig = $this->initialConfig;
$expectedConfig['foo'] = 'moo';
$this->assertAttributeEquals($expectedConfig, 'cache', $this->config);
$expected = "<?php\n\$CONFIG = array (\n 'foo' => 'moo',\n);\n";
$content = file_get_contents($this->configFile);
$expected = "<?php\n\$CONFIG = array (\n 'foo' => 'moo',\n 'beers' => \n array (\n 0 => 'Appenzeller',\n " .
" 1 => 'Guinness',\n 2 => 'Kölsch',\n ),\n 'alcohol_free' => false,\n);\n";
$this->assertEquals($expected, $content);
$this->config->setValue('bar', 'red');
$this->assertAttributeEquals(array('foo' => 'moo', 'bar' => 'red'), 'cache', $this->config);
$content = file_get_contents(self::CONFIG_FILE);
$expected = "<?php\n\$CONFIG = array (\n 'foo' => 'moo',\n 'bar' => 'red',\n);\n";
$this->config->setValue('bar', 'red');
$this->config->setValue('apps', array('files', 'gallery'));
$expectedConfig['bar'] = 'red';
$expectedConfig['apps'] = array('files', 'gallery');
$this->assertAttributeEquals($expectedConfig, 'cache', $this->config);
$content = file_get_contents($this->configFile);
$expected = "<?php\n\$CONFIG = array (\n 'foo' => 'moo',\n 'beers' => \n array (\n 0 => 'Appenzeller',\n " .
" 1 => 'Guinness',\n 2 => 'Kölsch',\n ),\n 'alcohol_free' => false,\n 'bar' => 'red',\n 'apps' => \n " .
" array (\n 0 => 'files',\n 1 => 'gallery',\n ),\n);\n";
$this->assertEquals($expected, $content);
}
public function testDeleteKey() {
$this->config->setDebugMode(false);
$this->config->deleteKey('foo');
$this->assertAttributeEquals(array(), 'cache', $this->config);
$content = file_get_contents(self::CONFIG_FILE);
$expectedConfig = $this->initialConfig;
unset($expectedConfig['foo']);
$this->assertAttributeEquals($expectedConfig, 'cache', $this->config);
$content = file_get_contents($this->configFile);
$expected = "<?php\n\$CONFIG = array (\n);\n";
$expected = "<?php\n\$CONFIG = array (\n 'beers' => \n array (\n 0 => 'Appenzeller',\n " .
" 1 => 'Guinness',\n 2 => 'Kölsch',\n ),\n 'alcohol_free' => false,\n);\n";
$this->assertEquals($expected, $content);
}
public function testSavingDebugMode() {
public function testSetDebugMode() {
$this->config->setDebugMode(true);
$this->config->deleteKey('foo'); // change something so we save to the config file
$this->assertAttributeEquals(array(), 'cache', $this->config);
$this->assertAttributeEquals($this->initialConfig, 'cache', $this->config);
$this->assertAttributeEquals(true, 'debugMode', $this->config);
$content = file_get_contents(self::CONFIG_FILE);
$content = file_get_contents($this->configFile);
$expected = "<?php\ndefine('DEBUG',true);\n\$CONFIG = array (\n 'foo' => 'bar',\n 'beers' => \n array (\n 0 => 'Appenzeller',\n " .
" 1 => 'Guinness',\n 2 => 'Kölsch',\n ),\n 'alcohol_free' => false,\n);\n";
$this->assertEquals($expected, $content);
$expected = "<?php\ndefine('DEBUG',true);\n\$CONFIG = array (\n);\n";
$this->config->setDebugMode(false);
$this->assertAttributeEquals($this->initialConfig, 'cache', $this->config);
$this->assertAttributeEquals(false, 'debugMode', $this->config);
$content = file_get_contents($this->configFile);
$expected = "<?php\n\$CONFIG = array (\n 'foo' => 'bar',\n 'beers' => \n array (\n 0 => 'Appenzeller',\n " .
" 1 => 'Guinness',\n 2 => 'Kölsch',\n ),\n 'alcohol_free' => false,\n);\n";
$this->assertEquals($expected, $content);
}
/**
* @expectedException \OC\HintException
*/
public function testWriteData() {
if (\OC_Util::runningOnWindows()) {
throw new \OC\HintException('this is ireelevent for windows');
}
$config = new OC\Config('/non-writable');
$config->setValue('foo', 'bar');
public function testIsDebugMode() {
// Default
$this->assertFalse($this->config->isDebugMode());
// Manually set to false
$this->config->setDebugMode(false);
$this->assertFalse($this->config->isDebugMode());
// Manually set to true
$this->config->setDebugMode(true);
$this->assertTrue($this->config->isDebugMode());
}
public function testConfigMerge() {
// Create additional config
$additionalConfig = '<?php $CONFIG=array("php53"=>"totallyOutdated");';
$additionalConfigPath = $this->randomTmpDir.'additionalConfig.testconfig.php';
file_put_contents($additionalConfigPath, $additionalConfig);
// Reinstantiate the config to force a read-in of the additional configs
$this->config = new \OC\Config($this->randomTmpDir, 'testconfig.php');
// Ensure that the config value can be read and the config has not been modified
$this->assertSame('totallyOutdated', $this->config->getValue('php53', 'bogusValue'));
$this->assertEquals(self::TESTCONTENT, file_get_contents($this->configFile));
// Write a new value to the config
$this->config->setValue('CoolWebsites', array('demo.owncloud.org', 'owncloud.org', 'owncloud.com'));
$expected = "<?php\n\$CONFIG = array (\n 'foo' => 'bar',\n 'beers' => \n array (\n 0 => 'Appenzeller',\n " .
" 1 => 'Guinness',\n 2 => 'Kölsch',\n ),\n 'alcohol_free' => false,\n 'php53' => 'totallyOutdated',\n 'CoolWebsites' => \n array (\n " .
" 0 => 'demo.owncloud.org',\n 1 => 'owncloud.org',\n 2 => 'owncloud.com',\n ),\n);\n";
$this->assertEquals($expected, file_get_contents($this->configFile));
// Cleanup
unlink($additionalConfigPath);
}
}