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<?php
// $Id: install.inc,v 1.56.2.2 2008/02/11 15:10:26 goba Exp $
define('SCHEMA_UNINSTALLED', -1);
define('SCHEMA_INSTALLED', 0);
define('REQUIREMENT_INFO', -1);
define('REQUIREMENT_OK', 0);
define('REQUIREMENT_WARNING', 1);
define('REQUIREMENT_ERROR', 2);
define('FILE_EXIST', 1);
define('FILE_READABLE', 2);
define('FILE_WRITABLE', 4);
define('FILE_EXECUTABLE', 8);
define('FILE_NOT_EXIST', 16);
define('FILE_NOT_READABLE', 32);
define('FILE_NOT_WRITABLE', 64);
define('FILE_NOT_EXECUTABLE', 128);
/**
* Initialize the update system by loading all installed module's .install files.
*/
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 $module
* A module name.
* @return
* If the module has updates, an array of available updates. Otherwise,
* FALSE.
*/
function drupal_get_schema_versions($module) {
$updates = array();
$functions = get_defined_functions();
foreach ($functions['user'] as $function) {
if (strpos($function, $module .'_update_') === 0) {
$version = substr($function, strlen($module .'_update_'));
if (is_numeric($version)) {
$updates[] = $version;
}
}
}
if (count($updates) == 0) {
return FALSE;
}
return $updates;
}
/**
* 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 $array
* Set to TRUE if you want to get information about all modules in the
* system.
* @return
* The currently installed schema version.
*/
function drupal_get_installed_schema_version($module, $reset = FALSE, $array = FALSE) {
static $versions = array();
if ($reset) {
$versions = array();
}
if (!$versions) {
$versions = array();
$result = db_query("SELECT name, schema_version FROM {system} WHERE type = '%s'", 'module');
while ($row = db_fetch_object($result)) {
$versions[$row->name] = $row->schema_version;
}
}
return $array ? $versions : $versions[$module];
}
/**
* 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_query("UPDATE {system} SET schema_version = %d WHERE name = '%s'", $version, $module);
}
/**
* Loads the profile definition, extracting the profile's defined name.
*
* @return
* The name defined in the profile's _profile_details() hook.
*/
function drupal_install_profile_name() {
global $profile;
static $name = NULL;
if (!isset($name)) {
// Load profile details.
$function = $profile .'_profile_details';
if (function_exists($function)) {
$details = $function();
}
$name = isset($details['name']) ? $details['name'] : 'Drupal';
}
return $name;
}
/**
* Auto detect the base_url with PHP predefined 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') {
global $profile;
$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";
}
/**
* Detect all databases supported by Drupal that are compiled into the current
* PHP installation.
*
* @return
* An array of database types compiled into PHP.
*/
function drupal_detect_database_types() {
$databases = array();
foreach (array('mysql', 'mysqli', 'pgsql') as $type) {
if (file_exists('./includes/install.'. $type .'.inc')) {
include_once './includes/install.'. $type .'.inc';
$function = $type .'_is_available';
if ($function()) {
$databases[$type] = $type;
}
}
}
return $databases;
}
/**
* Read settings.php into a buffer line by line, changing values specified in
* $settings array, then over-writing the old settings.php file.
*
* @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';
$settings_file = './'. conf_path(FALSE, TRUE) .'/'. $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($default_settings, 'r')) {
// Step line by line through settings.php.
while (!feof($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] ." = '". $setting['value'] ."';". (!empty($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 = '". $data['value'] ."';\n";
}
}
$fp = fopen($settings_file, 'w');
if ($fp && fwrite($fp, $buffer) === FALSE) {
drupal_set_message(st('Failed to modify %settings, please verify the file permissions.', array('%settings' => $settings_file)), 'error');
}
}
else {
drupal_set_message(st('Failed to open %settings, please verify the file permissions.', array('%settings' => $default_settings)), 'error');
}
}
/**
* Get list of all .install files.
*
* @param $module_list
* An array of modules to search for their .install files.
*/
function drupal_get_install_files($module_list = array()) {
$installs = array();
foreach ($module_list as $module) {
$installs = array_merge($installs, drupal_system_listing($module .'.install$', 'modules'));
}
return $installs;
}
/**
* Verify a profile for installation.
*
* @param profile
* Name of profile to verify.
* @param locale
* Name of locale used (if any).
* @return
* The list of modules to install.
*/
function drupal_verify_profile($profile, $locale) {
include_once './includes/file.inc';
include_once './includes/common.inc';
$profile_file = "./profiles/$profile/$profile.profile";
if (!isset($profile) || !file_exists($profile_file)) {
install_no_profile_error();
}
require_once($profile_file);
// Get a list of modules required by this profile.
$function = $profile .'_profile_modules';
$module_list = array_merge(drupal_required_modules(), $function(), ($locale != 'en' ? array('locale') : array()));
// Get a list of modules that exist in Drupal's assorted subdirectories.
$present_modules = array();
foreach (drupal_system_listing('\.module$', 'modules', 'name', 0) as $present_module) {
$present_modules[] = $present_module->name;
}
// Verify that all of the profile's required modules are present.
$missing_modules = array_diff($module_list, $present_modules);
if (count($missing_modules)) {
foreach ($missing_modules as $module) {
drupal_set_message(st('The %module module is required but was not found. Please move it into the <em>modules</em> subdirectory.', array('%module' => $module)), 'error');
}
}
else {
return $module_list;
}
}
/**
* Calls the install function and updates the system table for a given list of
* modules.
*
* @param module_list
* The modules to install.
*/
function drupal_install_modules($module_list = array()) {
$files = module_rebuild_cache();
$module_list = array_flip(array_values($module_list));
do {
$moved = FALSE;
foreach ($module_list as $module => $weight) {
$file = $files[$module];
if (isset($file->info['dependencies']) && is_array($file->info['dependencies'])) {
foreach ($file->info['dependencies'] as $dependency) {
if (isset($module_list[$dependency]) && $module_list[$module] < $module_list[$dependency] +1) {
$module_list[$module] = $module_list[$dependency] +1;
$moved = TRUE;
}
}
}
}
} while ($moved);
asort($module_list);
$module_list = array_keys($module_list);
array_filter($module_list, '_drupal_install_module');
module_enable($module_list);
}
/**
* Callback to install an individual profile module.
*
* Used during installation to install modules one at a time and then
* enable them, or to install a number of modules at one time
* from admin/build/modules.
*/
function _drupal_install_module($module) {
if (drupal_get_installed_schema_version($module, TRUE) == SCHEMA_UNINSTALLED) {
module_load_install($module);
module_invoke($module, 'install');
$versions = drupal_get_schema_versions($module);
drupal_set_installed_schema_version($module, $versions ? max($versions) : SCHEMA_INSTALLED);
return TRUE;
}
}
/**
* Callback to install 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 = dirname(drupal_get_filename('module', 'system', NULL));
require_once './'. $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_query("INSERT INTO {system} (filename, name, type, owner, status, throttle, bootstrap, schema_version) VALUES('%s', '%s', '%s', '%s', %d, %d, %d, %d)", $system_path .'/system.module', 'system', 'module', '', 1, 0, 0, $system_version);
// Now that we've installed things properly, bootstrap the full Drupal environment
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
module_rebuild_cache();
}
/**
* Calls the uninstall function and updates the system table for a given module.
*
* @param $module
* The module to uninstall.
*/
function drupal_uninstall_module($module) {
// First, retrieve all the module's menu paths from db.
drupal_load('module', $module);
$paths = module_invoke($module, 'menu');
// Uninstall the module(s).
module_load_install($module);
module_invoke($module, 'uninstall');
// Now remove the menu links for all paths declared by this module.
if (!empty($paths)) {
$paths = array_keys($paths);
// Clean out the names of load functions.
foreach ($paths as $index => $path) {
$parts = explode('/', $path, MENU_MAX_PARTS);
foreach ($parts as $k => $part) {
if (preg_match('/^%[a-z_]*$/', $part)) {
$parts[$k] = '%';
}
}
$paths[$index] = implode('/', $parts);
}
$placeholders = implode(', ', array_fill(0, count($paths), "'%s'"));
$result = db_query('SELECT * FROM {menu_links} WHERE router_path IN ('. $placeholders .') AND external = 0 ORDER BY depth DESC', $paths);
// Remove all such items. Starting from those with the greatest depth will
// minimize the amount of re-parenting done by menu_link_delete().
while ($item = db_fetch_array($result)) {
_menu_delete_item($item, TRUE);
}
}
drupal_set_installed_schema_version($module, SCHEMA_UNINSTALLED);
}
/**
* Verify 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;
}
/**
* Create a directory with 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 += 444;
break;
case FILE_WRITABLE:
$mod += 222;
break;
case FILE_EXECUTABLE:
$mod += 111;
break;
}
}
}
if (@mkdir($file, intval("0$mod", 8))) {
return TRUE;
}
else {
return FALSE;
}
}
/**
* Attempt 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) {
$mod = fileperms($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;
}
}
/**
* Send 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;
header('Location: '. $base_url .'/'. $path);
header('Cache-Control: no-cache'); // Not a permanent redirect.
exit();
}
/**
* Hardcoded function for doing the equivalent of t() during
* the install process, when database, theme, and localization
* system is possibly not yet available.
*/
function st($string, $args = array()) {
static $locale_strings = NULL;
global $profile, $install_locale;
if (!isset($locale_strings)) {
$locale_strings = array();
$filename = './profiles/'. $profile .'/translations/'. $install_locale .'.po';
if (file_exists($filename)) {
require_once './includes/locale.inc';
$file = (object) array('filepath' => $filename);
_locale_import_read_po('mem-store', $file);
$locale_strings = _locale_import_one_string('mem-report');
}
}
require_once './includes/theme.inc';
// Transform arguments before inserting them
foreach ($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[$string]) ? $locale_strings[$string] : $string), $args);
}
/**
* Check a profile's requirements.
*
* @param profile
* Name of profile to check.
*/
function drupal_check_profile($profile) {
include_once './includes/file.inc';
$profile_file = "./profiles/$profile/$profile.profile";
if (!isset($profile) || !file_exists($profile_file)) {
install_no_profile_error();
}
require_once($profile_file);
// Get a list of modules required by this profile.
$function = $profile .'_profile_modules';
$module_list = array_unique(array_merge(drupal_required_modules(), $function()));
// Get a list of all .install files.
$installs = drupal_get_install_files($module_list);
// Collect requirement testing results
$requirements = array();
foreach ($installs as $install) {
require_once $install->filename;
if (module_hook($install->name, 'requirements')) {
$requirements = array_merge($requirements, module_invoke($install->name, 'requirements', 'install'));
}
}
return $requirements;
}
/**
* Extract highest severity from requirements array.
*/
function drupal_requirements_severity(&$requirements) {
$severity = REQUIREMENT_OK;
foreach ($requirements as $requirement) {
if (isset($requirement['severity'])) {
$severity = max($severity, $requirement['severity']);
}
}
return $severity;
}
/**
* Check a module's requirements.
*/
function drupal_check_module($module) {
// Include install file
$install = drupal_get_install_files(array($module));
if (isset($install[$module])) {
require_once $install[$module]->filename;
// 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;
}
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