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install.inc 42.75 KiB
<?php
/**
* @file
* API functions for installing modules and themes.
*/
/**
* Indicates that a module has not been installed yet.
*/
define('SCHEMA_UNINSTALLED', -1);
/**
* Indicates that a module has been installed.
*/
define('SCHEMA_INSTALLED', 0);
/**
* Requirement severity -- Informational message only.
*/
define('REQUIREMENT_INFO', -1);
/**
* Requirement severity -- Requirement successfully met.
*/
define('REQUIREMENT_OK', 0);
/**
* Requirement severity -- Warning condition; proceed but flag warning.
*/
define('REQUIREMENT_WARNING', 1);
/**
* Requirement severity -- Error condition; abort installation.
*/
define('REQUIREMENT_ERROR', 2);
/**
* File permission check -- File exists.
*/
define('FILE_EXIST', 1);
/**
* File permission check -- File is readable.
*/
define('FILE_READABLE', 2);
/**
* File permission check -- File is writable.
*/
define('FILE_WRITABLE', 4);
/**
* File permission check -- File is executable.
*/
define('FILE_EXECUTABLE', 8);
/**
* File permission check -- File does not exist.
*/
define('FILE_NOT_EXIST', 16);
/**
* File permission check -- File is not readable.
*/
define('FILE_NOT_READABLE', 32);
/**
* File permission check -- File is not writable.
*/define('FILE_NOT_WRITABLE', 64);
/**
* File permission check -- File is not executable.
*/
define('FILE_NOT_EXECUTABLE', 128);
/**
* Loads .install files for installed modules to initialize the update system.
*/
function drupal_load_updates() {
foreach (drupal_get_installed_schema_version(NULL, FALSE, TRUE) as $module => $schema_version) {
if ($schema_version > -1) {
module_load_install($module);
}
}
}
/**
* Returns an array of available schema versions for a module.
*
* @param $module
* A module name.
* @return
* If the module has updates, an array of available updates sorted by version.
* Otherwise, FALSE.
*/
function drupal_get_schema_versions($module) {
$updates = &drupal_static(__FUNCTION__, NULL);
if (!isset($updates[$module])) {
$updates = array();
foreach (module_list() as $loaded_module) {
$updates[$loaded_module] = array();
}
// Prepare regular expression to match all possible defined hook_update_N().
$regexp = '/^(?P<module>.+)_update_(?P<version>\d+)$/';
$functions = get_defined_functions();
// Narrow this down to functions ending with an integer, since all
// hook_update_N() functions end this way, and there are other
// possible functions which match '_update_'. We use preg_grep() here
// instead of foreaching through all defined functions, since the loop
// through all PHP functions can take significant page execution time
// and this function is called on every administrative page via
// system_requirements().
foreach (preg_grep('/_\d+$/', $functions['user']) as $function) {
// If this function is a module update function, add it to the list of
// module updates.
if (preg_match($regexp, $function, $matches)) {
$updates[$matches['module']][] = $matches['version'];
}
}
// Ensure that updates are applied in numerical order.
foreach ($updates as &$module_updates) {
sort($module_updates, SORT_NUMERIC);
}
}
return empty($updates[$module]) ? FALSE : $updates[$module];
}
/**
* Returns the currently installed schema version for a module.
*
* @param $module
* A module name.
* @param $reset
* Set to TRUE after modifying the system table.
* @param $array
* Set to TRUE if you want to get information about all modules in the * system.
* @return
* The currently installed schema version, or SCHEMA_UNINSTALLED if the
* module is not installed.
*/
function drupal_get_installed_schema_version($module, $reset = FALSE, $array = FALSE) {
static $versions = array();
if ($reset) {
$versions = array();
}
if (!$versions) {
$versions = array();
$result = db_query("SELECT name, schema_version FROM {system} WHERE type = :type", array(':type' => 'module'));
foreach ($result as $row) {
$versions[$row->name] = $row->schema_version;
}
}
if ($array) {
return $versions;
}
else {
return isset($versions[$module]) ? $versions[$module] : SCHEMA_UNINSTALLED;
}
}
/**
* Update the installed version information for a module.
*
* @param $module
* A module name.
* @param $version
* The new schema version.
*/
function drupal_set_installed_schema_version($module, $version) {
db_update('system')
->fields(array('schema_version' => $version))
->condition('name', $module)
->execute();
// Reset the static cache of module schema versions.
drupal_get_installed_schema_version(NULL, TRUE);
}
/**
* Loads the installation profile, extracting its defined distribution name.
*
* @return
* The distribution name defined in the profile's .info file. Defaults to
* "Drupal" if none is explicitly provided by the installation profile.
*
* @see install_profile_info()
*/
function drupal_install_profile_distribution_name() {
// During installation, the profile information is stored in the global
// installation state (it might not be saved anywhere yet).
if (drupal_installation_attempted()) {
global $install_state;
return $install_state['profile_info']['distribution_name'];
}
// At all other times, we load the profile via standard methods.
else {
$profile = drupal_get_profile();
$info = system_get_info('module', $profile);
return $info['distribution_name'];
}
}
/**
* Detects the base URL using the PHP $_SERVER variables.
*
* @param $file
* The name of the file calling this function so we can strip it out of
* the URI when generating the base_url.
*
* @return
* The auto-detected $base_url that should be configured in settings.php
*/
function drupal_detect_baseurl($file = 'install.php') {
$proto = $_SERVER['HTTPS'] ? 'https://' : 'http://';
$host = $_SERVER['SERVER_NAME'];
$port = ($_SERVER['SERVER_PORT'] == 80 ? '' : ':' . $_SERVER['SERVER_PORT']);
$uri = preg_replace("/\?.*/", '', $_SERVER['REQUEST_URI']);
$dir = str_replace("/$file", '', $uri);
return "$proto$host$port$dir";
}
/**
* Detects all supported databases that are compiled into PHP.
*
* @return
* An array of database types compiled into PHP.
*/
function drupal_detect_database_types() {
$databases = drupal_get_database_types();
foreach ($databases as $driver => $installer) {
$databases[$driver] = $installer->name();
}
return $databases;
}
/**
* Returns all supported database installer objects that are compiled into PHP.
*
* @return
* An array of database installer objects compiled into PHP.
*/
function drupal_get_database_types() {
$databases = array();
// We define a driver as a directory in /includes/database that in turn
// contains a database.inc file. That allows us to drop in additional drivers
// without modifying the installer.
// Because we have no registry yet, we need to also include the install.inc
// file for the driver explicitly.
require_once DRUPAL_ROOT . '/includes/database/database.inc';
foreach (file_scan_directory(DRUPAL_ROOT . '/includes/database', '/^[a-z]*$/i', array('recurse' => FALSE)) as $file) {
if (file_exists($file->uri . '/database.inc') && file_exists($file->uri . '/install.inc')) {
$drivers[$file->filename] = $file->uri;
}
}
foreach ($drivers as $driver => $file) {
$installer = db_installer_object($driver);
if ($installer->installable()) {
$databases[$driver] = $installer;
}
}
// Usability: unconditionally put the MySQL driver on top.
if (isset($databases['mysql'])) {
$mysql_database = $databases['mysql'];
unset($databases['mysql']);
$databases = array('mysql' => $mysql_database) + $databases;
}
return $databases;
}
/**
* Database installer structure.
*
* Defines basic Drupal requirements for databases.
*/
abstract class DatabaseTasks {
/**
* Structure that describes each task to run.
*
* @var array
*
* Each value of the tasks array is an associative array defining the function
* to call (optional) and any arguments to be passed to the function.
*/
protected $tasks = array(
array(
'function' => 'checkEngineVersion',
'arguments' => array(),
),
array(
'arguments' => array(
'CREATE TABLE {drupal_install_test} (id int NULL)',
'Drupal can use CREATE TABLE database commands.',
'Failed to <strong>CREATE</strong> a test table on your database server with the command %query. The server reports the following message: %error.<p>Are you sure the configured username has the necessary permissions to create tables in the database?</p>',
TRUE,
),
),
array(
'arguments' => array(
'INSERT INTO {drupal_install_test} (id) VALUES (1)',
'Drupal can use INSERT database commands.',
'Failed to <strong>INSERT</strong> a value into a test table on your database server. We tried inserting a value with the command %query and the server reported the following error: %error.',
),
),
array(
'arguments' => array(
'UPDATE {drupal_install_test} SET id = 2',
'Drupal can use UPDATE database commands.',
'Failed to <strong>UPDATE</strong> a value in a test table on your database server. We tried updating a value with the command %query and the server reported the following error: %error.',
),
),
array(
'arguments' => array(
'DELETE FROM {drupal_install_test}',
'Drupal can use DELETE database commands.',
'Failed to <strong>DELETE</strong> a value from a test table on your database server. We tried deleting a value with the command %query and the server reported the following error: %error.',
),
),
array(
'arguments' => array(
'DROP TABLE {drupal_install_test}',
'Drupal can use DROP TABLE database commands.',
'Failed to <strong>DROP</strong> a test table from your database server. We tried dropping a table with the command %query and the server reported the following error %error.',
),
),
);
/**
* Results from tasks.
*
* @var array
*/
protected $results = array();
/** * Ensure the PDO driver is supported by the version of PHP in use.
*/
protected function hasPdoDriver() {
return in_array($this->pdoDriver, PDO::getAvailableDrivers());
}
/**
* Assert test as failed.
*/
protected function fail($message) {
$this->results[$message] = FALSE;
}
/**
* Assert test as a pass.
*/
protected function pass($message) {
$this->results[$message] = TRUE;
}
/**
* Check whether Drupal is installable on the database.
*/
public function installable() {
return $this->hasPdoDriver() && empty($this->error);
}
/**
* Return the human-readable name of the driver.
*/
abstract public function name();
/**
* Return the minimum required version of the engine.
*
* @return
* A version string. If not NULL, it will be checked against the version
* reported by the Database engine using version_compare().
*/
public function minimumVersion() {
return NULL;
}
/**
* Run database tasks and tests to see if Drupal can run on the database.
*/
public function runTasks() {
// We need to establish a connection before we can run tests.
if ($this->connect()) {
foreach ($this->tasks as $task) {
if (!isset($task['function'])) {
$task['function'] = 'runTestQuery';
}
if (method_exists($this, $task['function'])) {
// Returning false is fatal. No other tasks can run.
if (FALSE === call_user_func_array(array($this, $task['function']), $task['arguments'])) {
break;
}
}
else {
throw new DatabaseTaskException(st("Failed to run all tasks against the database server. The task %task wasn't found.", array('%task' => $task['function'])));
}
}
}
// Check for failed results and compile message
$message = '';
foreach ($this->results as $result => $success) {
if (!$success) {
$message .= '<p class="error">' . $result . '</p>';
} }
if (!empty($message)) {
$message = '<p>In order for Drupal to work, and to continue with the installation process, you must resolve all issues reported below. For more help with configuring your database server, see the <a href="http://drupal.org/getting-started/install">installation handbook</a>. If you are unsure what any of this means you should probably contact your hosting provider.</p>' . $message;
throw new DatabaseTaskException($message);
}
}
/**
* Check if we can connect to the database.
*/
protected function connect() {
try {
// This doesn't actually test the connection.
db_set_active();
// Now actually do a check.
Database::getConnection();
$this->pass('Drupal can CONNECT to the database ok.');
}
catch (Exception $e) {
$this->fail(st('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist, and have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname?</li></ul>', array('%error' => $e->getMessage())));
return FALSE;
}
return TRUE;
}
/**
* Run SQL tests to ensure the database can execute commands with the current user.
*/
protected function runTestQuery($query, $pass, $fail, $fatal = FALSE) {
try {
db_query($query);
$this->pass(st($pass));
}
catch (Exception $e) {
$this->fail(st($fail, array('%query' => $query, '%error' => $e->getMessage(), '%name' => $this->name())));
return !$fatal;
}
}
/**
* Check the engine version.
*/
protected function checkEngineVersion() {
if ($this->minimumVersion() && version_compare(Database::getConnection()->version(), $this->minimumVersion(), '<')) {
$this->fail(st("The database version %version is less than the minimum required version %minimum_version.", array('%version' => Database::getConnection()->version(), '%minimum_version' => $this->minimumVersion())));
}
}
/**
* Return driver specific configuration options.
*
* @param $database
* An array of driver specific configuration options.
*
* @return
* The options form array.
*/
public function getFormOptions($database) {
$form['database'] = array(
'#type' => 'textfield',
'#title' => st('Database name'),
'#default_value' => empty($database['database']) ? '' : $database['database'],
'#size' => 45,
'#required' => TRUE,
'#description' => st('The name of the database your @drupal data will be stored in. It must exist on your server before @drupal can be installed.', array('@drupal' => drupal_install_profile_distribution_name())),
);
$form['username'] = array(
'#type' => 'textfield',
'#title' => st('Database username'), '#default_value' => empty($database['username']) ? '' : $database['username'],
'#required' => TRUE,
'#size' => 45,
);
$form['password'] = array(
'#type' => 'password',
'#title' => st('Database password'),
'#default_value' => empty($database['password']) ? '' : $database['password'],
'#required' => FALSE,
'#size' => 45,
);
$form['advanced_options'] = array(
'#type' => 'fieldset',
'#title' => st('Advanced options'),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#description' => st("These options are only necessary for some sites. If you're not sure what you should enter here, leave the default settings or check with your hosting provider."),
'#weight' => 10,
);
$profile = drupal_get_profile();
$db_prefix = ($profile == 'standard') ? 'drupal_' : $profile . '_';
$form['advanced_options']['db_prefix'] = array(
'#type' => 'textfield',
'#title' => st('Table prefix'),
'#default_value' => '',
'#size' => 45,
'#description' => st('If more than one application will be sharing this database, enter a table prefix such as %prefix for your @drupal site here.', array('@drupal' => drupal_install_profile_distribution_name(), '%prefix' => $db_prefix)),
'#weight' => 10,
);
$form['advanced_options']['host'] = array(
'#type' => 'textfield',
'#title' => st('Database host'),
'#default_value' => empty($database['host']) ? 'localhost' : $database['host'],
'#size' => 45,
// Hostnames can be 255 characters long.
'#maxlength' => 255,
'#required' => TRUE,
'#description' => st('If your database is located on a different server, change this.'),
);
$form['advanced_options']['port'] = array(
'#type' => 'textfield',
'#title' => st('Database port'),
'#default_value' => empty($database['port']) ? '' : $database['port'],
'#size' => 45,
// The maximum port number is 65536, 5 digits.
'#maxlength' => 5,
'#description' => st('If your database server is listening to a non-standard port, enter its number.'),
);
return $form;
}
/**
* Validates driver specific configuration settings.
*
* Checks to ensure correct basic database settings and that a proper
* connection to the database can be established.
*
* @param $database
* An array of driver specific configuration options.
*
* @return
* An array of driver configuration errors, keyed by form element name.
*/
public function validateDatabaseSettings($database) { $errors = array();
// Verify the table prefix.
if (!empty($database['prefix']) && is_string($database['prefix']) && !preg_match('/^[A-Za-z0-9_.]+$/', $database['prefix'])) {
$errors[$database['driver'] . '][advanced_options][db_prefix'] = st('The database table prefix you have entered, %prefix, is invalid. The table prefix can only contain alphanumeric characters, periods, or underscores.', array('%prefix' => $database['prefix']));
}
// Verify the database port.
if (!empty($database['port']) && !is_numeric($database['port'])) {
$errors[$database['driver'] . '][advanced_options][port'] = st('Database port must be a number.');
}
return $errors;
}
}
/**
* Exception thrown if the database installer fails.
*/
class DatabaseTaskException extends Exception {
}
/**
* Replaces values in settings.php with values in the submitted array.
*
* @param $settings
* An array of settings that need to be updated.
*/
function drupal_rewrite_settings($settings = array(), $prefix = '') {
$default_settings = 'sites/default/default.settings.php';
drupal_static_reset('conf_path');
$settings_file = conf_path(FALSE) . '/' . $prefix . 'settings.php';
// Build list of setting names and insert the values into the global namespace.
$keys = array();
foreach ($settings as $setting => $data) {
$GLOBALS[$setting] = $data['value'];
$keys[] = $setting;
}
$buffer = NULL;
$first = TRUE;
if ($fp = fopen(DRUPAL_ROOT . '/' . $default_settings, 'r')) {
// Step line by line through settings.php.
while (!feof($fp)) {
$line = fgets($fp);
if ($first && substr($line, 0, 5) != '<?php') {
$buffer = "<?php\n\n";
}
$first = FALSE;
// Check for constants.
if (substr($line, 0, 7) == 'define(') {
preg_match('/define\(\s*[\'"]([A-Z_-]+)[\'"]\s*,(.*?)\);/', $line, $variable);
if (in_array($variable[1], $keys)) {
$setting = $settings[$variable[1]];
$buffer .= str_replace($variable[2], " '" . $setting['value'] . "'", $line);
unset($settings[$variable[1]]);
unset($settings[$variable[2]]);
}
else {
$buffer .= $line;
}
}
// Check for variables.
elseif (substr($line, 0, 1) == '$') {
preg_match('/\$([^ ]*) /', $line, $variable);
if (in_array($variable[1], $keys)) {
// Write new value to settings.php in the following format:
// $'setting' = 'value'; // 'comment' $setting = $settings[$variable[1]];
$buffer .= '$' . $variable[1] . " = " . var_export($setting['value'], TRUE) . ";" . (!empty($setting['comment']) ? ' // ' . $setting['comment'] . "\n" : "\n");
unset($settings[$variable[1]]);
}
else {
$buffer .= $line;
}
}
else {
$buffer .= $line;
}
}
fclose($fp);
// Add required settings that were missing from settings.php.
foreach ($settings as $setting => $data) {
if ($data['required']) {
$buffer .= "\$$setting = " . var_export($data['value'], TRUE) . ";\n";
}
}
$fp = fopen(DRUPAL_ROOT . '/' . $settings_file, 'w');
if ($fp && fwrite($fp, $buffer) === FALSE) {
throw new Exception(st('Failed to modify %settings. Verify the file permissions.', array('%settings' => $settings_file)));
}
}
else {
throw new Exception(st('Failed to open %settings. Verify the file permissions.', array('%settings' => $default_settings)));
}
}
/**
* Verifies an installation profile for installation.
*
* @param $install_state
* An array of information about the current installation state.
*
* @return
* The list of modules to install.
*/
function drupal_verify_profile($install_state) {
$profile = $install_state['parameters']['profile'];
$locale = $install_state['parameters']['locale'];
include_once DRUPAL_ROOT . '/includes/file.inc';
include_once DRUPAL_ROOT . '/includes/common.inc';
$profile_file = DRUPAL_ROOT . "/profiles/$profile/$profile.profile";
if (!isset($profile) || !file_exists($profile_file)) {
throw new Exception(install_no_profile_error());
}
$info = $install_state['profile_info'];
// Get a list of modules that exist in Drupal's assorted subdirectories.
$present_modules = array();
foreach (drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.module$/', 'modules', 'name', 0) as $present_module) {
$present_modules[] = $present_module->name;
}
// The installation profile is also a module, which needs to be installed
// after all the other dependencies have been installed.
$present_modules[] = drupal_get_profile();
// Verify that all of the profile's required modules are present.
$missing_modules = array_diff($info['dependencies'], $present_modules);
$requirements = array();
if (count($missing_modules)) { $modules = array();
foreach ($missing_modules as $module) {
$modules[] = '<span class="admin-missing">' . drupal_ucfirst($module) . '</span>';
}
$requirements['required_modules'] = array(
'title' => st('Required modules'),
'value' => st('Required modules not found.'),
'severity' => REQUIREMENT_ERROR,
'description' => st('The following modules are required but were not found. Move them into the appropriate modules subdirectory, such as <em>sites/all/modules</em>. Missing modules: !modules', array('!modules' => implode(', ', $modules))),
);
}
return $requirements;
}
/**
* Installs the system module.
*
* Separated from the installation of other modules so core system
* functions can be made available while other modules are installed.
*/
function drupal_install_system() {
$system_path = drupal_get_path('module', 'system');
require_once DRUPAL_ROOT . '/' . $system_path . '/system.install';
module_invoke('system', 'install');
$system_versions = drupal_get_schema_versions('system');
$system_version = $system_versions ? max($system_versions) : SCHEMA_INSTALLED;
db_insert('system')
->fields(array('filename', 'name', 'type', 'owner', 'status', 'schema_version', 'bootstrap'))
->values(array(
'filename' => $system_path . '/system.module',
'name' => 'system',
'type' => 'module',
'owner' => '',
'status' => 1,
'schema_version' => $system_version,
'bootstrap' => 0,
))
->execute();
system_rebuild_module_data();
}
/**
* Uninstalls a given list of modules.
*
* @param $module_list
* The modules to uninstall.
* @param $uninstall_dependents
* If TRUE, the function will check that all modules which depend on the
* passed-in module list either are already uninstalled or contained in the
* list, and it will ensure that the modules are uninstalled in the correct
* order. This incurs a significant performance cost, so use FALSE if you
* know $module_list is already complete and in the correct order.
*
* @return
* FALSE if one or more dependent modules are missing from the list, TRUE
* otherwise.
*/
function drupal_uninstall_modules($module_list = array(), $uninstall_dependents = TRUE) {
if ($uninstall_dependents) {
// Get all module data so we can find dependents and sort.
$module_data = system_rebuild_module_data();
// Create an associative array with weights as values.
$module_list = array_flip(array_values($module_list));
$profile = drupal_get_profile();
while (list($module) = each($module_list)) {
if (!isset($module_data[$module]) || drupal_get_installed_schema_version($module) == SCHEMA_UNINSTALLED) {
// This module doesn't exist or is already uninstalled, skip it.
unset($module_list[$module]); continue;
}
$module_list[$module] = $module_data[$module]->sort;
// If the module has any dependents which are not already uninstalled and
// not included in the passed-in list, abort. It is not safe to uninstall
// them automatically because uninstalling a module is a destructive
// operation.
foreach (array_keys($module_data[$module]->required_by) as $dependent) {
if (!isset($module_list[$dependent]) && drupal_get_installed_schema_version($dependent) != SCHEMA_UNINSTALLED && $dependent != $profile) {
return FALSE;
}
}
}
// Sort the module list by pre-calculated weights.
asort($module_list);
$module_list = array_keys($module_list);
}
foreach ($module_list as $module) {
// Uninstall the module.
module_load_install($module);
module_invoke($module, 'uninstall');
drupal_uninstall_schema($module);
watchdog('system', '%module module uninstalled.', array('%module' => $module), WATCHDOG_INFO);
drupal_set_installed_schema_version($module, SCHEMA_UNINSTALLED);
}
if (!empty($module_list)) {
// Call hook_module_uninstall to let other modules act
module_invoke_all('modules_uninstalled', $module_list);
}
return TRUE;
}
/**
* Verifies the state of the specified file.
*
* @param $file
* The file to check for.
* @param $mask
* An optional bitmask created from various FILE_* constants.
* @param $type
* The type of file. Can be file (default), dir, or link.
*
* @return
* TRUE on success or FALSE on failure. A message is set for the latter.
*/
function drupal_verify_install_file($file, $mask = NULL, $type = 'file') {
$return = TRUE;
// Check for files that shouldn't be there.
if (isset($mask) && ($mask & FILE_NOT_EXIST) && file_exists($file)) {
return FALSE;
}
// Verify that the file is the type of file it is supposed to be.
if (isset($type) && file_exists($file)) {
$check = 'is_' . $type;
if (!function_exists($check) || !$check($file)) {
$return = FALSE;
}
}
// Verify file permissions.
if (isset($mask)) {
$masks = array(FILE_EXIST, FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE);
foreach ($masks as $current_mask) {
if ($mask & $current_mask) { switch ($current_mask) {
case FILE_EXIST:
if (!file_exists($file)) {
if ($type == 'dir') {
drupal_install_mkdir($file, $mask);
}
if (!file_exists($file)) {
$return = FALSE;
}
}
break;
case FILE_READABLE:
if (!is_readable($file) && !drupal_install_fix_file($file, $mask)) {
$return = FALSE;
}
break;
case FILE_WRITABLE:
if (!is_writable($file) && !drupal_install_fix_file($file, $mask)) {
$return = FALSE;
}
break;
case FILE_EXECUTABLE:
if (!is_executable($file) && !drupal_install_fix_file($file, $mask)) {
$return = FALSE;
}
break;
case FILE_NOT_READABLE:
if (is_readable($file) && !drupal_install_fix_file($file, $mask)) {
$return = FALSE;
}
break;
case FILE_NOT_WRITABLE:
if (is_writable($file) && !drupal_install_fix_file($file, $mask)) {
$return = FALSE;
}
break;
case FILE_NOT_EXECUTABLE:
if (is_executable($file) && !drupal_install_fix_file($file, $mask)) {
$return = FALSE;
}
break;
}
}
}
}
return $return;
}
/**
* Creates a directory with the specified permissions.
*
* @param $file
* The name of the directory to create;
* @param $mask
* The permissions of the directory to create.
* @param $message
* (optional) Whether to output messages. Defaults to TRUE.
*
* @return
* TRUE/FALSE whether or not the directory was successfully created.
*/
function drupal_install_mkdir($file, $mask, $message = TRUE) {
$mod = 0;
$masks = array(FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE);
foreach ($masks as $m) {
if ($mask & $m) {
switch ($m) {
case FILE_READABLE:
$mod |= 0444;
break; case FILE_WRITABLE:
$mod |= 0222;
break;
case FILE_EXECUTABLE:
$mod |= 0111;
break;
}
}
}
if (@drupal_mkdir($file, $mod)) {
return TRUE;
}
else {
return FALSE;
}
}
/**
* Attempts to fix file permissions.
*
* The general approach here is that, because we do not know the security
* setup of the webserver, we apply our permission changes to all three
* digits of the file permission (i.e. user, group and all).
*
* To ensure that the values behave as expected (and numbers don't carry
* from one digit to the next) we do the calculation on the octal value
* using bitwise operations. This lets us remove, for example, 0222 from
* 0700 and get the correct value of 0500.
*
* @param $file
* The name of the file with permissions to fix.
* @param $mask
* The desired permissions for the file.
* @param $message
* (optional) Whether to output messages. Defaults to TRUE.
*
* @return
* TRUE/FALSE whether or not we were able to fix the file's permissions.
*/
function drupal_install_fix_file($file, $mask, $message = TRUE) {
// If $file does not exist, fileperms() issues a PHP warning.
if (!file_exists($file)) {
return FALSE;
}
$mod = fileperms($file) & 0777;
$masks = array(FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE);
// FILE_READABLE, FILE_WRITABLE, and FILE_EXECUTABLE permission strings
// can theoretically be 0400, 0200, and 0100 respectively, but to be safe
// we set all three access types in case the administrator intends to
// change the owner of settings.php after installation.
foreach ($masks as $m) {
if ($mask & $m) {
switch ($m) {
case FILE_READABLE:
if (!is_readable($file)) {
$mod |= 0444;
}
break;
case FILE_WRITABLE:
if (!is_writable($file)) {
$mod |= 0222;
}
break;
case FILE_EXECUTABLE:
if (!is_executable($file)) {
$mod |= 0111;
} break;
case FILE_NOT_READABLE:
if (is_readable($file)) {
$mod &= ~0444;
}
break;
case FILE_NOT_WRITABLE:
if (is_writable($file)) {
$mod &= ~0222;
}
break;
case FILE_NOT_EXECUTABLE:
if (is_executable($file)) {
$mod &= ~0111;
}
break;
}
}
}
// chmod() will work if the web server is running as owner of the file.
// If PHP safe_mode is enabled the currently executing script must also
// have the same owner.
if (@chmod($file, $mod)) {
return TRUE;
}
else {
return FALSE;
}
}
/**
* Sends the user to a different installer page.
*
* This issues an on-site HTTP redirect. Messages (and errors) are erased.
*
* @param $path
* An installer path.
*/
function install_goto($path) {
global $base_url;
include_once DRUPAL_ROOT . '/includes/common.inc';
header('Location: ' . $base_url . '/' . $path);
header('Cache-Control: no-cache'); // Not a permanent redirect.
drupal_exit();
}
/**
* Returns the URL of the current script, with modified query parameters.
*
* This function can be called by low-level scripts (such as install.php and
* update.php) and returns the URL of the current script. Existing query
* parameters are preserved by default, but new ones can optionally be merged
* in.
*
* This function is used when the script must maintain certain query parameters
* over multiple page requests in order to work correctly. In such cases (for
* example, update.php, which requires the 'continue=1' parameter to remain in
* the URL throughout the update process if there are any requirement warnings
* that need to be bypassed), using this function to generate the URL for links
* to the next steps of the script ensures that the links will work correctly.
*
* @param $query
* (optional) An array of query parameters to merge in to the existing ones.
*
* @return
* The URL of the current script, with query parameters modified by the
* passed-in $query. The URL is not sanitized, so it still needs to be run
* through check_url() if it will be used as an HTML attribute value.
* * @see drupal_requirements_url()
*/
function drupal_current_script_url($query = array()) {
$uri = $_SERVER['SCRIPT_NAME'];
$query = array_merge(drupal_get_query_parameters(), $query);
if (!empty($query)) {
$uri .= '?' . drupal_http_build_query($query);
}
return $uri;
}
/**
* Returns a URL for proceeding to the next page after a requirements problem.
*
* This function can be called by low-level scripts (such as install.php and
* update.php) and returns a URL that can be used to attempt to proceed to the
* next step of the script.
*
* @param $severity
* The severity of the requirements problem, as returned by
* drupal_requirements_severity().
*
* @return
* A URL for attempting to proceed to the next step of the script. The URL is
* not sanitized, so it still needs to be run through check_url() if it will
* be used as an HTML attribute value.
*
* @see drupal_current_script_url()
*/
function drupal_requirements_url($severity) {
$query = array();
// If there are no errors, only warnings, append 'continue=1' to the URL so
// the user can bypass this screen on the next page load.
if ($severity == REQUIREMENT_WARNING) {
$query['continue'] = 1;
}
return drupal_current_script_url($query);
}
/**
* Translates a string when some systems are not available.
*
* Used during the install process, when database, theme, and localization
* system is possibly not yet available.
*
* Use t() if your code will never run during the Drupal installation phase.
* Use st() if your code will only run during installation and never any other
* time. Use get_t() if your code could run in either circumstance.
*
* @see t()
* @see get_t()
* @ingroup sanitization
*/
function st($string, array $args = array(), array $options = array()) {
static $locale_strings = NULL;
global $install_state;
if (empty($options['context'])) {
$options['context'] = '';
}
if (!isset($locale_strings)) {
$locale_strings = array();
if (isset($install_state['parameters']['profile']) && isset($install_state['parameters']['locale'])) {
// If the given locale was selected, there should be at least one .po file
// with its name ending in {$install_state['parameters']['locale']}.po
// This might or might not be the entire filename. It is also possible
// that multiple files end with the same extension, even if unlikely.
$po_files = file_scan_directory('./profiles/' . $install_state['parameters']['profile'] . '/translations', '/'. $install_state['parameters']['locale'] .'\.po$/', array('recurse' => FALSE));
if (count($po_files)) { require_once DRUPAL_ROOT . '/includes/locale.inc';
foreach ($po_files as $po_file) {
_locale_import_read_po('mem-store', $po_file);
}
$locale_strings = _locale_import_one_string('mem-report');
}
}
}
require_once DRUPAL_ROOT . '/includes/theme.inc';
// Transform arguments before inserting them
foreach ($args as $key => $value) {
switch ($key[0]) {
// Escaped only
case '@':
$args[$key] = check_plain($value);
break;
// Escaped and placeholder
case '%':
default:
$args[$key] = '<em>' . check_plain($value) . '</em>';
break;
// Pass-through
case '!':
}
}
return strtr((!empty($locale_strings[$options['context']][$string]) ? $locale_strings[$options['context']][$string] : $string), $args);
}
/**
* Checks an installation profile's requirements.
*
* @param $profile
* Name of installation profile to check.
* @return
* Array of the installation profile's requirements.
*/
function drupal_check_profile($profile) {
include_once DRUPAL_ROOT . '/includes/file.inc';
$profile_file = DRUPAL_ROOT . "/profiles/$profile/$profile.profile";
if (!isset($profile) || !file_exists($profile_file)) {
throw new Exception(install_no_profile_error());
}
$info = install_profile_info($profile);
// Collect requirement testing results.
$requirements = array();
foreach ($info['dependencies'] as $module) {
module_load_install($module);
$function = $module . '_requirements';
if (function_exists($function)) {
$requirements = array_merge($requirements, $function('install'));
}
}
return $requirements;
}
/**
* Extracts the highest severity from the requirements array.
*
* @param $requirements
* An array of requirements, in the same format as is returned by
* hook_requirements().
*
* @return
* The highest severity in the array.
*/function drupal_requirements_severity(&$requirements) {
$severity = REQUIREMENT_OK;
foreach ($requirements as $requirement) {
if (isset($requirement['severity'])) {
$severity = max($severity, $requirement['severity']);
}
}
return $severity;
}
/**
* Checks a module's requirements.
*
* @param $module
* Machine name of module to check.
*
* @return
* TRUE or FALSE, depending on whether the requirements are met.
*/
function drupal_check_module($module) {
module_load_install($module);
if (module_hook($module, 'requirements')) {
// Check requirements
$requirements = module_invoke($module, 'requirements', 'install');
if (is_array($requirements) && drupal_requirements_severity($requirements) == REQUIREMENT_ERROR) {
// Print any error messages
foreach ($requirements as $requirement) {
if (isset($requirement['severity']) && $requirement['severity'] == REQUIREMENT_ERROR) {
$message = $requirement['description'];
if (isset($requirement['value']) && $requirement['value']) {
$message .= ' (' . t('Currently using !item !version', array('!item' => $requirement['title'], '!version' => $requirement['value'])) . ')';
}
drupal_set_message($message, 'error');
}
}
return FALSE;
}
}
return TRUE;
}
/**
* Retrieves information about an installation profile from its .info file.
*
* The information stored in a profile .info file is similar to that stored in
* a normal Drupal module .info file. For example:
* - name: The real name of the installation profile for display purposes.
* - description: A brief description of the profile.
* - dependencies: An array of shortnames of other modules that this install
* profile requires.
*
* Additional, less commonly-used information that can appear in a profile.info
* file but not in a normal Drupal module .info file includes:
* - distribution_name: The name of the Drupal distribution that is being
* installed, to be shown throughout the installation process. Defaults to
* 'Drupal'.
* - exclusive: If the install profile is intended to be the only eligible
* choice in a distribution, setting exclusive = TRUE will auto-select it
* during installation, and the install profile selection screen will be
* skipped. If more than one profile is found where exclusive = TRUE then
* this property will have no effect and the profile selection screen will
* be shown as normal with all available profiles shown.
*
* Note that this function does an expensive file system scan to get info file
* information for dependencies. If you only need information from the info
* file itself, use system_get_info().
*
* Example of .info file:
* @code
* name = Minimal * description = Start fresh, with only a few modules enabled.
* dependencies[] = block
* dependencies[] = dblog
* @endcode
*
* @param $profile
* Name of profile.
* @param $locale
* Name of locale used (if any).
*
* @return
* The info array.
*/
function install_profile_info($profile, $locale = 'en') {
$cache = &drupal_static(__FUNCTION__, array());
if (!isset($cache[$profile])) {
// Set defaults for module info.
$defaults = array(
'dependencies' => array(),
'description' => '',
'distribution_name' => 'Drupal',
'version' => NULL,
'hidden' => FALSE,
'php' => DRUPAL_MINIMUM_PHP,
);
$info = drupal_parse_info_file("profiles/$profile/$profile.info") + $defaults;
$info['dependencies'] = array_unique(array_merge(
drupal_required_modules(),
$info['dependencies'],
($locale != 'en' && !empty($locale) ? array('locale') : array()))
);
// drupal_required_modules() includes the current profile as a dependency.
// Since a module can't depend on itself we remove that element of the array.
array_shift($info['dependencies']);
$cache[$profile] = $info;
}
return $cache[$profile];
}
/**
* Ensures the environment for a Drupal database on a predefined connection.
*
* This will run tasks that check that Drupal can perform all of the functions
* on a database, that Drupal needs. Tasks include simple checks like CREATE
* TABLE to database specific functions like stored procedures and client
* encoding.
*/
function db_run_tasks($driver) {
db_installer_object($driver)->runTasks();
return TRUE;
}
/**
* Returns a database installer object.
*
* @param $driver
* The name of the driver.
*/
function db_installer_object($driver) {
Database::loadDriverFile($driver, array('install.inc'));
$task_class = 'DatabaseTasks_' . $driver;
return new $task_class();
}