install.inc 42.2 KB
Newer Older
1 2
<?php

3 4
use Drupal\Database\Database;

5 6 7
/**
 * Indicates that a module has not been installed yet.
 */
8
const SCHEMA_UNINSTALLED = -1;
9 10 11 12

/**
 * Indicates that a module has been installed.
 */
13
const SCHEMA_INSTALLED = 0;
14

15 16 17
/**
 * Requirement severity -- Informational message only.
 */
18
const REQUIREMENT_INFO = -1;
19 20 21 22

/**
 * Requirement severity -- Requirement successfully met.
 */
23
const REQUIREMENT_OK = 0;
24 25 26 27

/**
 * Requirement severity -- Warning condition; proceed but flag warning.
 */
28
const REQUIREMENT_WARNING = 1;
29 30 31 32

/**
 * Requirement severity -- Error condition; abort installation.
 */
33
const REQUIREMENT_ERROR = 2;
34

35 36 37
/**
 * File permission check -- File exists.
 */
38
const FILE_EXIST = 1;
39 40 41 42

/**
 * File permission check -- File is readable.
 */
43
const FILE_READABLE = 2;
44 45 46 47

/**
 * File permission check -- File is writable.
 */
48
const FILE_WRITABLE = 4;
49 50 51 52

/**
 * File permission check -- File is executable.
 */
53
const FILE_EXECUTABLE = 8;
54 55 56 57

/**
 * File permission check -- File does not exist.
 */
58
const FILE_NOT_EXIST = 16;
59 60 61 62

/**
 * File permission check -- File is not readable.
 */
63
const FILE_NOT_READABLE = 32;
64 65 66 67

/**
 * File permission check -- File is not writable.
 */
68
const FILE_NOT_WRITABLE = 64;
69 70 71 72

/**
 * File permission check -- File is not executable.
 */
73
const FILE_NOT_EXECUTABLE = 128;
74

75 76 77 78
/**
 * Initialize the update system by loading all installed module's .install files.
 */
function drupal_load_updates() {
79 80 81 82
  foreach (drupal_get_installed_schema_version(NULL, FALSE, TRUE) as $module => $schema_version) {
    if ($schema_version > -1) {
      module_load_install($module);
    }
83 84 85 86
  }
}

/**
87
 * Returns an array of available schema versions for a module.
88 89 90 91
 *
 * @param $module
 *   A module name.
 * @return
92
 *   If the module has updates, an array of available updates sorted by version.
93
 *   Otherwise, FALSE.
94 95
 */
function drupal_get_schema_versions($module) {
96
  $updates = &drupal_static(__FUNCTION__, NULL);
97
  if (!isset($updates[$module])) {
98
    $updates = array();
99 100 101 102 103

    foreach (module_list() as $loaded_module) {
      $updates[$loaded_module] = array();
    }

104
    // Prepare regular expression to match all possible defined hook_update_N().
105
    $regexp = '/^(?P<module>.+)_update_(?P<version>\d+)$/';
106 107 108 109 110 111 112 113 114 115 116 117 118
    $functions = get_defined_functions();
    // Narrow this down to functions ending with an integer, since all
    // hook_update_N() functions end this way, and there are other
    // possible functions which match '_update_'. We use preg_grep() here
    // instead of foreaching through all defined functions, since the loop
    // through all PHP functions can take significant page execution time
    // and this function is called on every administrative page via
    // system_requirements().
    foreach (preg_grep('/_\d+$/', $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']][] = $matches['version'];
119
      }
120
    }
121 122 123 124
    // Ensure that updates are applied in numerical order.
    foreach ($updates as &$module_updates) {
      sort($module_updates, SORT_NUMERIC);
    }
125
  }
126
  return empty($updates[$module]) ? FALSE : $updates[$module];
127 128 129 130 131 132 133
}

/**
 * Returns the currently installed schema version for a module.
 *
 * @param $module
 *   A module name.
134 135 136
 * @param $reset
 *   Set to TRUE after modifying the system table.
 * @param $array
137
 *   Set to TRUE if you want to get information about all modules in the
138
 *   system.
139
 * @return
140 141
 *   The currently installed schema version, or SCHEMA_UNINSTALLED if the
 *   module is not installed.
142
 */
143
function drupal_get_installed_schema_version($module, $reset = FALSE, $array = FALSE) {
144
  static $versions = array();
145 146

  if ($reset) {
147
    $versions = array();
148 149 150 151
  }

  if (!$versions) {
    $versions = array();
152 153
    $result = db_query("SELECT name, schema_version FROM {system} WHERE type = :type", array(':type' => 'module'));
    foreach ($result as $row) {
154 155 156 157
      $versions[$row->name] = $row->schema_version;
    }
  }

158 159 160 161 162 163
  if ($array) {
    return $versions;
  }
  else {
    return isset($versions[$module]) ? $versions[$module] : SCHEMA_UNINSTALLED;
  }
164 165 166 167 168 169 170 171 172 173 174
}

/**
 * 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) {
175 176 177 178
  db_update('system')
    ->fields(array('schema_version' => $version))
    ->condition('name', $module)
    ->execute();
179 180 181

  // Reset the static cache of module schema versions.
  drupal_get_installed_schema_version(NULL, TRUE);
182
}
183 184

/**
185
 * Loads the install profile, extracting its defined distribution name.
186 187
 *
 * @return
188 189 190 191
 *   The distribution name defined in the profile's .info file. Defaults to
 *   "Drupal" if none is explicitly provided by the install profile.
 *
 * @see install_profile_info()
192
 */
193
function drupal_install_profile_distribution_name() {
194 195 196 197 198 199 200 201 202
  // 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();
203
    $info = system_get_info('module', $profile);
204 205
    return $info['distribution_name'];
  }
206 207 208 209 210 211 212 213 214 215 216
}

/**
 * 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 $base_url that should be configured in settings.php
 */
217
function drupal_detect_baseurl($file = 'core/install.php') {
218 219
  $proto = $_SERVER['HTTPS'] ? 'https://' : 'http://';
  $host = $_SERVER['SERVER_NAME'];
220
  $port = ($_SERVER['SERVER_PORT'] == 80 ? '' : ':' . $_SERVER['SERVER_PORT']);
221
  $uri = preg_replace("/\?.*/", '', $_SERVER['REQUEST_URI']);
222 223 224 225 226 227
  $dir = str_replace("/$file", '', $uri);

  return "$proto$host$port$dir";
}

/**
228
 * Detect all supported databases that are compiled into PHP.
229 230 231 232 233
 *
 * @return
 *  An array of database types compiled into PHP.
 */
function drupal_detect_database_types() {
234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249
  $databases = drupal_get_database_types();

  foreach ($databases as $driver => $installer) {
    $databases[$driver] = $installer->name();
  }

  return $databases;
}

/**
 * Return 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() {
250 251
  $databases = array();

252
  // We define a driver as a directory in /core/includes/database that in turn
253
  // contains a database.inc file. That allows us to drop in additional drivers
254 255 256
  // without modifying the installer.
  // Because we have no registry yet, we need to also include the install.inc
  // file for the driver explicitly.
257 258
  require_once DRUPAL_ROOT . '/core/includes/database/database.inc';
  foreach (file_scan_directory(DRUPAL_ROOT . '/core/includes/database', '/^[a-z]*$/i', array('recurse' => FALSE)) as $file) {
259 260 261
    if (file_exists($file->uri . '/database.inc') && file_exists($file->uri . '/install.inc')) {
      $drivers[$file->filename] = $file->uri;
    }
262 263 264
  }

  foreach ($drivers as $driver => $file) {
265
    $installer = db_installer_object($driver);
266
    if ($installer->installable()) {
267
      $databases[$driver] = $installer;
268 269
    }
  }
270

271
  // Usability: unconditionally put the MySQL driver on top.
272 273 274 275 276
  if (isset($databases['mysql'])) {
    $mysql_database = $databases['mysql'];
    unset($databases['mysql']);
    $databases = array('mysql' => $mysql_database) + $databases;
  }
277

278 279 280
  return $databases;
}

281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296
/**
 * 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(
297 298 299 300
    array(
      'function'    => 'checkEngineVersion',
      'arguments'   => array(),
    ),
301 302
    array(
      'arguments'   => array(
303
        'CREATE TABLE {drupal_install_test} (id int NULL)',
304
        'Drupal can use CREATE TABLE database commands.',
305
        '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>',
306 307
        TRUE,
      ),
308
    ),
309 310
    array(
      'arguments'   => array(
311
        'INSERT INTO {drupal_install_test} (id) VALUES (1)',
312
        'Drupal can use INSERT database commands.',
313
        '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.',
314
      ),
315
    ),
316 317
    array(
      'arguments'   => array(
318
        'UPDATE {drupal_install_test} SET id = 2',
319
        'Drupal can use UPDATE database commands.',
320
        '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.',
321
      ),
322
    ),
323 324
    array(
      'arguments'   => array(
325
        'DELETE FROM {drupal_install_test}',
326
        'Drupal can use DELETE database commands.',
327
        '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.',
328
      ),
329
    ),
330 331
    array(
      'arguments'   => array(
332
        'DROP TABLE {drupal_install_test}',
333
        'Drupal can use DROP TABLE database commands.',
334
        '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.',
335
      ),
336 337
    ),
  );
338

339 340 341 342 343 344
  /**
   * Results from tasks.
   *
   * @var array
   */
  protected $results = array();
345

346 347 348
  /**
   * Ensure the PDO driver is supported by the version of PHP in use.
   */
349 350 351 352
  protected function hasPdoDriver() {
    return in_array($this->pdoDriver, PDO::getAvailableDrivers());
  }

353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369
  /**
   * 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.
   */
370
  public function installable() {
371
    return $this->hasPdoDriver() && empty($this->error);
372 373
  }

374 375 376
  /**
   * Return the human-readable name of the driver.
   */
377
  abstract public function name();
378 379 380 381 382 383 384 385 386 387 388

  /**
   * 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;
  }
389

390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406
  /**
   * 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 {
407
          throw new DatabaseTaskException(st("Failed to run all tasks against the database server. The task %task wasn't found.", array('%task' => $task['function'])));
408 409
        }
      }
410
    }
411 412 413 414 415
    // Check for failed results and compile message
    $message = '';
    foreach ($this->results as $result => $success) {
      if (!$success) {
        $message .= '<p class="error">' . $result  . '</p>';
416 417
      }
    }
418
    if (!empty($message)) {
419
      $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>' . $message;
420 421
      throw new DatabaseTaskException($message);
    }
422 423
  }

424 425 426
  /**
   * Check if we can connect to the database.
   */
427
  protected function connect() {
428
    try {
429
      // This doesn't actually test the connection.
430
      db_set_active();
431 432
      // Now actually do a check.
      Database::getConnection();
433
      $this->pass('Drupal can CONNECT to the database ok.');
434 435
    }
    catch (Exception $e) {
436
      $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())));
437 438
      return FALSE;
    }
439
    return TRUE;
440 441
  }

442 443 444 445
  /**
   * Run SQL tests to ensure the database can execute commands with the current user.
   */
  protected function runTestQuery($query, $pass, $fail, $fatal = FALSE) {
446 447
    try {
      db_query($query);
448
      $this->pass(st($pass));
449 450
    }
    catch (Exception $e) {
451 452
      $this->fail(st($fail, array('%query' => $query, '%error' => $e->getMessage(), '%name' => $this->name())));
      return !$fatal;
453 454
    }
  }
455 456 457 458 459 460 461 462 463

  /**
   * 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())));
    }
  }
464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551

  /**
   * 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 $database
   *   An array of driver specific configuration options.
552
   *
553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571
   * @return
   *   An array of driver configuration errors, keyed by form element name.
   */
  public function validateDatabaseSettings($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;
  }

572
}
573

574
/**
575
 * Exception thrown if the database installer fails.
576 577 578
 */
class DatabaseTaskException extends Exception {
}
579 580

/**
581
 * Replace values in settings.php with values in the submitted array.
582 583 584 585
 *
 * @param $settings
 *   An array of settings that need to be updated.
 */
586
function drupal_rewrite_settings($settings = array()) {
587
  $default_settings = 'sites/default/default.settings.php';
588
  drupal_static_reset('conf_path');
589
  $settings_file = conf_path(FALSE) . '/settings.php';
590 591 592 593 594 595 596 597 598 599

  // 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;
  $first = TRUE;
600
  if ($fp = fopen(DRUPAL_ROOT . '/' . $default_settings, 'r')) {
601 602 603 604 605 606 607 608 609 610 611 612
    // Step line by line through settings.php.
    while (!feof($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]];
613
          $buffer .= str_replace($variable[2], " '" . $setting['value'] . "'", $line);
614 615 616 617 618 619 620 621 622 623 624 625 626 627
          unset($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]];
628
          $buffer .= '$' . $variable[1] . " = " . var_export($setting['value'], TRUE) . ";" . (!empty($setting['comment']) ? ' // ' . $setting['comment'] . "\n" : "\n");
629 630 631 632 633 634 635 636 637 638 639 640 641 642 643
          unset($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']) {
644
        $buffer .= "\$$setting = " . var_export($data['value'], TRUE) . ";\n";
645 646 647
      }
    }

648
    $fp = fopen(DRUPAL_ROOT . '/' . $settings_file, 'w');
649
    if ($fp && fwrite($fp, $buffer) === FALSE) {
650
      throw new Exception(st('Failed to modify %settings. Verify the file permissions.', array('%settings' => $settings_file)));
651 652 653
    }
  }
  else {
654
    throw new Exception(st('Failed to open %settings. Verify the file permissions.', array('%settings' => $default_settings)));
655 656 657 658
  }
}

/**
659
 * Verify an install profile for installation.
660
 *
661 662
 * @param $install_state
 *   An array of information about the current installation state.
Steven Wittens's avatar
Steven Wittens committed
663 664
 * @return
 *   The list of modules to install.
665
 */
666 667
function drupal_verify_profile($install_state) {
  $profile = $install_state['parameters']['profile'];
668
  $langcode = $install_state['parameters']['langcode'];
669

670 671
  include_once DRUPAL_ROOT . '/core/includes/file.inc';
  include_once DRUPAL_ROOT . '/core/includes/common.inc';
672

673
  $profile_file = DRUPAL_ROOT . "/profiles/$profile/$profile.profile";
674 675

  if (!isset($profile) || !file_exists($profile_file)) {
676
    throw new Exception(install_no_profile_error());
677
  }
678
  $info = $install_state['profile_info'];
679

680 681
  // Get a list of modules that exist in Drupal's assorted subdirectories.
  $present_modules = array();
682
  foreach (drupal_system_listing('/^' . DRUPAL_PHP_FUNCTION_PATTERN . '\.module$/', 'modules', 'name', 0) as $present_module) {
683 684 685
    $present_modules[] = $present_module->name;
  }

686 687 688 689
  // The install profile is also a module, which needs to be installed after all the other dependencies
  // have been installed.
  $present_modules[] = drupal_get_profile();

690
  // Verify that all of the profile's required modules are present.
691
  $missing_modules = array_diff($info['dependencies'], $present_modules);
692 693

  $requirements = array();
694

695
  if (count($missing_modules)) {
696
    $modules = array();
697
    foreach ($missing_modules as $module) {
698
      $modules[] = '<span class="admin-missing">' . drupal_ucfirst($module) . '</span>';
Steven Wittens's avatar
Steven Wittens committed
699
    }
700 701 702 703
    $requirements['required_modules'] = array(
      'title'       => st('Required modules'),
      'value'       => st('Required modules not found.'),
      'severity'    => REQUIREMENT_ERROR,
704
      '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))),
705
    );
Steven Wittens's avatar
Steven Wittens committed
706
  }
707
  return $requirements;
Steven Wittens's avatar
Steven Wittens committed
708
}
709

710 711 712 713 714 715 716
/**
 * 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() {
717
  $system_path = drupal_get_path('module', 'system');
718
  require_once DRUPAL_ROOT . '/' . $system_path . '/system.install';
Steven Wittens's avatar
Steven Wittens committed
719
  module_invoke('system', 'install');
720

Steven Wittens's avatar
Steven Wittens committed
721 722
  $system_versions = drupal_get_schema_versions('system');
  $system_version = $system_versions ? max($system_versions) : SCHEMA_INSTALLED;
723
  db_insert('system')
724
    ->fields(array('filename', 'name', 'type', 'owner', 'status', 'schema_version', 'bootstrap'))
725 726 727 728 729 730
    ->values(array(
        'filename' => $system_path . '/system.module',
        'name' => 'system',
        'type' => 'module',
        'owner' => '',
        'status' => 1,
731 732 733
        'schema_version' => $system_version,
        'bootstrap' => 0,
      ))
734
    ->execute();
735
  system_rebuild_module_data();
736 737
}

738
/**
739
 * Uninstalls a given list of modules.
740
 *
741 742
 * @param $module_list
 *   The modules to uninstall.
743 744 745 746 747 748 749 750 751 752
 * @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 $module_list is already complete and in the correct order.
 *
 * @return
 *   FALSE if one or more dependent modules are missing from the list, TRUE
 *   otherwise.
753
 */
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
function drupal_uninstall_modules($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);
  }

786 787 788 789
  foreach ($module_list as $module) {
    // Uninstall the module.
    module_load_install($module);
    module_invoke($module, 'uninstall');
790 791
    drupal_uninstall_schema($module);

792
    watchdog('system', '%module module uninstalled.', array('%module' => $module), WATCHDOG_INFO);
793
    drupal_set_installed_schema_version($module, SCHEMA_UNINSTALLED);
794 795
  }

796 797 798 799
  if (!empty($module_list)) {
    // Call hook_module_uninstall to let other modules act
    module_invoke_all('modules_uninstalled', $module_list);
  }
800 801

  return TRUE;
802 803
}

804 805 806 807 808 809 810 811 812 813
/**
 * 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 $type
 *   The type of file. Can be file (default), dir, or link.
 * @return
814
 *   TRUE on success or FALSE on failure. A message is set for the latter.
815 816 817 818 819 820 821 822 823
 */
function drupal_verify_install_file($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)) {
824
    $check = 'is_' . $type;
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885
    if (!function_exists($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.
 *
886
 * @param $file
887
 *  The name of the directory to create;
888
 * @param $mask
889 890 891 892 893 894 895 896 897 898 899 900 901
 *  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:
902
          $mod |= 0444;
903 904
          break;
        case FILE_WRITABLE:
905
          $mod |= 0222;
906 907
          break;
        case FILE_EXECUTABLE:
908
          $mod |= 0111;
909 910 911 912 913
          break;
      }
    }
  }

914
  if (@drupal_mkdir($file, $mod)) {
915 916 917 918 919 920 921 922 923 924
    return TRUE;
  }
  else {
    return FALSE;
  }
}

/**
 * Attempt to fix file permissions.
 *
925 926 927 928 929 930 931 932 933
 * 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.
 *
934 935 936 937 938 939 940 941 942 943
 * @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) {
944 945 946 947 948
  // If $file does not exist, fileperms() issues a PHP warning.
  if (!file_exists($file)) {
    return FALSE;
  }

949
  $mod = fileperms($file) & 0777;
950
  $masks = array(FILE_READABLE, FILE_WRITABLE, FILE_EXECUTABLE, FILE_NOT_READABLE, FILE_NOT_WRITABLE, FILE_NOT_EXECUTABLE);
951 952 953 954 955

  // 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.
956 957 958 959 960
  foreach ($masks as $m) {
    if ($mask & $m) {
      switch ($m) {
        case FILE_READABLE:
          if (!is_readable($file)) {
961
            $mod |= 0444;
962 963 964 965
          }
          break;
        case FILE_WRITABLE:
          if (!is_writable($file)) {
966
            $mod |= 0222;
967 968 969 970
          }
          break;
        case FILE_EXECUTABLE:
          if (!is_executable($file)) {
971
            $mod |= 0111;
972 973 974 975
          }
          break;
        case FILE_NOT_READABLE:
          if (is_readable($file)) {
976
            $mod &= ~0444;
977 978 979 980
          }
          break;
        case FILE_NOT_WRITABLE:
          if (is_writable($file)) {
981
            $mod &= ~0222;
982 983 984 985
          }
          break;
        case FILE_NOT_EXECUTABLE:
          if (is_executable($file)) {
986
            $mod &= ~0111;
987 988 989 990 991 992
          }
          break;
      }
    }
  }

993 994 995 996
  // 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)) {
997 998 999 1000 1001 1002 1003
    return TRUE;
  }
  else {
    return FALSE;
  }
}

1004
/**
1005
 * Send the user to a different installer page.
1006 1007
 *
 * This issues an on-site HTTP redirect. Messages (and errors) are erased.
1008 1009 1010 1011 1012
 *
 * @param $path
 *   An installer path.
 */
function install_goto($path) {
1013
  global $base_url;
1014
  include_once DRUPAL_ROOT . '/core/includes/common.inc';
1015
  header('Location: ' . $base_url . '/' . $path);
1016
  header('Cache-Control: no-cache'); // Not a permanent redirect.
1017
  drupal_exit();
1018 1019
}

1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
/**
 * 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);
}

1082
/**
1083 1084 1085
 * Functional equivalent of t(), used when some systems are not available.
 *
 * Used during the install process, when database, theme, and localization
1086
 * system is possibly not yet available.
1087
 *
1088