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   1  <?php
   2  // $Id: update.php,v 1.252.2.4 2010/11/03 12:29:24 goba Exp $
   3  
   4  /**
   5   * @file
   6   * Administrative page for handling updates from one Drupal version to another.
   7   *
   8   * Point your browser to "http://www.example.com/update.php" and follow the
   9   * instructions.
  10   *
  11   * If you are not logged in as administrator, you will need to modify the access
  12   * check statement inside your settings.php file. After finishing the upgrade,
  13   * be sure to open settings.php again, and change it back to its original state!
  14   */
  15  
  16  /**
  17   * Global flag to identify update.php run, and so avoid various unwanted
  18   * operations, such as hook_init() and hook_exit() invokes, css/js preprocessing
  19   * and translation, and solve some theming issues. This flag is checked on several
  20   * places in Drupal code (not just update.php).
  21   */
  22  define('MAINTENANCE_MODE', 'update');
  23  
  24  /**
  25   * Add a column to a database using syntax appropriate for PostgreSQL.
  26   * Save result of SQL commands in $ret array.
  27   *
  28   * Note: when you add a column with NOT NULL and you are not sure if there are
  29   * already rows in the table, you MUST also add DEFAULT. Otherwise PostgreSQL
  30   * won't work when the table is not empty, and db_add_column() will fail.
  31   * To have an empty string as the default, you must use: 'default' => "''"
  32   * in the $attributes array. If NOT NULL and DEFAULT are set the PostgreSQL
  33   * version will set values of the added column in old rows to the
  34   * DEFAULT value.
  35   *
  36   * @param $ret
  37   *   Array to which results will be added.
  38   * @param $table
  39   *   Name of the table, without {}
  40   * @param $column
  41   *   Name of the column
  42   * @param $type
  43   *   Type of column
  44   * @param $attributes
  45   *   Additional optional attributes. Recognized attributes:
  46   *     not null => TRUE|FALSE
  47   *     default  => NULL|FALSE|value (the value must be enclosed in '' marks)
  48   * @return
  49   *   nothing, but modifies $ret parameter.
  50   */
  51  function db_add_column(&$ret, $table, $column, $type, $attributes = array()) {
  52    if (array_key_exists('not null', $attributes) and $attributes['not null']) {
  53      $not_null = 'NOT NULL';
  54    }
  55    if (array_key_exists('default', $attributes)) {
  56      if (is_null($attributes['default'])) {
  57        $default_val = 'NULL';
  58        $default = 'default NULL';
  59      }
  60      elseif ($attributes['default'] === FALSE) {
  61        $default = '';
  62      }
  63      else {
  64        $default_val = "$attributes[default]";
  65        $default = "default $attributes[default]";
  66      }
  67    }
  68  
  69    $ret[] = update_sql("ALTER TABLE {". $table ."} ADD $column $type");
  70    if (!empty($default)) {
  71      $ret[] = update_sql("ALTER TABLE {". $table ."} ALTER $column SET $default");
  72    }
  73    if (!empty($not_null)) {
  74      if (!empty($default)) {
  75        $ret[] = update_sql("UPDATE {". $table ."} SET $column = $default_val");
  76      }
  77      $ret[] = update_sql("ALTER TABLE {". $table ."} ALTER $column SET NOT NULL");
  78    }
  79  }
  80  
  81  /**
  82   * Change a column definition using syntax appropriate for PostgreSQL.
  83   * Save result of SQL commands in $ret array.
  84   *
  85   * Remember that changing a column definition involves adding a new column
  86   * and dropping an old one. This means that any indices, primary keys and
  87   * sequences from serial-type columns are dropped and might need to be
  88   * recreated.
  89   *
  90   * @param $ret
  91   *   Array to which results will be added.
  92   * @param $table
  93   *   Name of the table, without {}
  94   * @param $column
  95   *   Name of the column to change
  96   * @param $column_new
  97   *   New name for the column (set to the same as $column if you don't want to change the name)
  98   * @param $type
  99   *   Type of column
 100   * @param $attributes
 101   *   Additional optional attributes. Recognized attributes:
 102   *     not null => TRUE|FALSE
 103   *     default  => NULL|FALSE|value (with or without '', it won't be added)
 104   * @return
 105   *   nothing, but modifies $ret parameter.
 106   */
 107  function db_change_column(&$ret, $table, $column, $column_new, $type, $attributes = array()) {
 108    if (array_key_exists('not null', $attributes) and $attributes['not null']) {
 109      $not_null = 'NOT NULL';
 110    }
 111    if (array_key_exists('default', $attributes)) {
 112      if (is_null($attributes['default'])) {
 113        $default_val = 'NULL';
 114        $default = 'default NULL';
 115      }
 116      elseif ($attributes['default'] === FALSE) {
 117        $default = '';
 118      }
 119      else {
 120        $default_val = "$attributes[default]";
 121        $default = "default $attributes[default]";
 122      }
 123    }
 124  
 125    $ret[] = update_sql("ALTER TABLE {". $table ."} RENAME $column TO ". $column ."_old");
 126    $ret[] = update_sql("ALTER TABLE {". $table ."} ADD $column_new $type");
 127    $ret[] = update_sql("UPDATE {". $table ."} SET $column_new = ". $column ."_old");
 128    if ($default) { $ret[] = update_sql("ALTER TABLE {". $table ."} ALTER $column_new SET $default"); }
 129    if ($not_null) { $ret[] = update_sql("ALTER TABLE {". $table ."} ALTER $column_new SET NOT NULL"); }
 130    $ret[] = update_sql("ALTER TABLE {". $table ."} DROP ". $column ."_old");
 131  }
 132  
 133  /**
 134   * Perform one update and store the results which will later be displayed on
 135   * the finished page.
 136   *
 137   * An update function can force the current and all later updates for this
 138   * module to abort by returning a $ret array with an element like:
 139   * $ret['#abort'] = array('success' => FALSE, 'query' => 'What went wrong');
 140   * The schema version will not be updated in this case, and all the
 141   * aborted updates will continue to appear on update.php as updates that
 142   * have not yet been run.
 143   *
 144   * @param $module
 145   *   The module whose update will be run.
 146   * @param $number
 147   *   The update number to run.
 148   * @param $context
 149   *   The batch context array
 150   */
 151  function update_do_one($module, $number, &$context) {
 152    // If updates for this module have been aborted
 153    // in a previous step, go no further.
 154    if (!empty($context['results'][$module]['#abort'])) {
 155      return;
 156    }
 157  
 158    $function = $module .'_update_'. $number;
 159    if (function_exists($function)) {
 160      $ret = $function($context['sandbox']);
 161    }
 162  
 163    if (isset($ret['#finished'])) {
 164      $context['finished'] = $ret['#finished'];
 165      unset($ret['#finished']);
 166    }
 167  
 168    if (!isset($context['results'][$module])) {
 169      $context['results'][$module] = array();
 170    }
 171    if (!isset($context['results'][$module][$number])) {
 172      $context['results'][$module][$number] = array();
 173    }
 174    $context['results'][$module][$number] = array_merge($context['results'][$module][$number], $ret);
 175  
 176    if (!empty($ret['#abort'])) {
 177      $context['results'][$module]['#abort'] = TRUE;
 178    }
 179    // Record the schema update if it was completed successfully.
 180    if ($context['finished'] == 1 && empty($context['results'][$module]['#abort'])) {
 181      drupal_set_installed_schema_version($module, $number);
 182    }
 183  
 184    $context['message'] = 'Updating '. check_plain($module) .' module';
 185  }
 186  
 187  function update_selection_page() {
 188    $output = '<p>The version of Drupal you are updating from has been automatically detected. You can select a different version, but you should not need to.</p>';
 189    $output .= '<p>Click Update to start the update process.</p>';
 190  
 191    drupal_set_title('Drupal database update');
 192    $output .= drupal_get_form('update_script_selection_form');
 193  
 194    update_task_list('select');
 195  
 196    return $output;
 197  }
 198  
 199  function update_script_selection_form() {
 200    $form = array();
 201    $form['start'] = array(
 202      '#tree' => TRUE,
 203      '#type' => 'fieldset',
 204      '#title' => 'Select versions',
 205      '#collapsible' => TRUE,
 206      '#collapsed' => TRUE,
 207    );
 208  
 209    // Ensure system.module's updates appear first
 210    $form['start']['system'] = array();
 211  
 212    $modules = drupal_get_installed_schema_version(NULL, FALSE, TRUE);
 213    foreach ($modules as $module => $schema_version) {
 214      $updates = drupal_get_schema_versions($module);
 215      // Skip incompatible module updates completely, otherwise test schema versions.
 216      if (!update_check_incompatibility($module) && $updates !== FALSE && $schema_version >= 0) {
 217        // module_invoke returns NULL for nonexisting hooks, so if no updates
 218        // are removed, it will == 0.
 219        $last_removed = module_invoke($module, 'update_last_removed');
 220        if ($schema_version < $last_removed) {
 221          $form['start'][$module] = array(
 222            '#value'  => '<em>'. $module .'</em> module can not be updated. Its schema version is '. $schema_version .'. Updates up to and including '. $last_removed .' have been removed in this release. In order to update <em>'. $module .'</em> module, you will first <a href="http://drupal.org/upgrade">need to upgrade</a> to the last version in which these updates were available.',
 223            '#prefix' => '<div class="warning">',
 224            '#suffix' => '</div>',
 225          );
 226          $form['start']['#collapsed'] = FALSE;
 227          continue;
 228        }
 229        $updates = drupal_map_assoc($updates);
 230        $updates[] = 'No updates available';
 231        $default = $schema_version;
 232        foreach (array_keys($updates) as $update) {
 233          if ($update > $schema_version) {
 234            $default = $update;
 235            break;
 236          }
 237        }
 238        $form['start'][$module] = array(
 239          '#type' => 'select',
 240          '#title' => $module .' module',
 241          '#default_value' => $default,
 242          '#options' => $updates,
 243        );
 244      }
 245    }
 246  
 247    $form['has_js'] = array(
 248      '#type' => 'hidden',
 249      '#default_value' => FALSE,
 250    );
 251    $form['submit'] = array(
 252      '#type' => 'submit',
 253      '#value' => 'Update',
 254    );
 255    return $form;
 256  }
 257  
 258  function update_batch() {
 259    global $base_url;
 260  
 261    $operations = array();
 262    // Set the installed version so updates start at the correct place.
 263    foreach ($_POST['start'] as $module => $version) {
 264      drupal_set_installed_schema_version($module, $version - 1);
 265      $updates = drupal_get_schema_versions($module);
 266      $max_version = max($updates);
 267      if ($version <= $max_version) {
 268        foreach ($updates as $update) {
 269          if ($update >= $version) {
 270            $operations[] = array('update_do_one', array($module, $update));
 271          }
 272        }
 273      }
 274    }
 275    $batch = array(
 276      'operations' => $operations,
 277      'title' => 'Updating',
 278      'init_message' => 'Starting updates',
 279      'error_message' => 'An unrecoverable error has occurred. You can find the error message below. It is advised to copy it to the clipboard for reference.',
 280      'finished' => 'update_finished',
 281    );
 282    batch_set($batch);
 283    batch_process($base_url .'/update.php?op=results', $base_url .'/update.php');
 284  }
 285  
 286  function update_finished($success, $results, $operations) {
 287    // clear the caches in case the data has been updated.
 288    drupal_flush_all_caches();
 289  
 290    $_SESSION['update_results'] = $results;
 291    $_SESSION['update_success'] = $success;
 292    $_SESSION['updates_remaining'] = $operations;
 293  }
 294  
 295  function update_results_page() {
 296    drupal_set_title('Drupal database update');
 297    // NOTE: we can't use l() here because the URL would point to 'update.php?q=admin'.
 298    $links[] = '<a href="'. base_path() .'">Main page</a>';
 299    $links[] = '<a href="'. base_path() .'?q=admin">Administration pages</a>';
 300  
 301    update_task_list();
 302    // Report end result
 303    if (module_exists('dblog')) {
 304      $log_message = ' All errors have been <a href="'. base_path() .'?q=admin/reports/dblog">logged</a>.';
 305    }
 306    else {
 307      $log_message = ' All errors have been logged.';
 308    }
 309  
 310    if ($_SESSION['update_success']) {
 311      $output = '<p>Updates were attempted. If you see no failures below, you may proceed happily to the <a href="'. base_path() .'?q=admin">administration pages</a>. Otherwise, you may need to update your database manually.'. $log_message .'</p>';
 312    }
 313    else {
 314      list($module, $version) = array_pop(reset($_SESSION['updates_remaining']));
 315      $output = '<p class="error">The update process was aborted prematurely while running <strong>update #'. $version .' in '. $module .'.module</strong>.'. $log_message;
 316      if (module_exists('dblog')) {
 317        $output .= ' You may need to check the <code>watchdog</code> database table manually.';
 318      }
 319      $output .= '</p>';
 320    }
 321  
 322    if (!empty($GLOBALS['update_free_access'])) {
 323      $output .= "<p><strong>Reminder: don't forget to set the <code>\$update_free_access</code> value in your <code>settings.php</code> file back to <code>FALSE</code>.</strong></p>";
 324    }
 325  
 326    $output .= theme('item_list', $links);
 327  
 328    // Output a list of queries executed
 329    if (!empty($_SESSION['update_results'])) {
 330      $output .= '<div id="update-results">';
 331      $output .= '<h2>The following queries were executed</h2>';
 332      foreach ($_SESSION['update_results'] as $module => $updates) {
 333        $output .= '<h3>'. $module .' module</h3>';
 334        foreach ($updates as $number => $queries) {
 335          if ($number != '#abort') {
 336            $output .= '<h4>Update #'. $number .'</h4>';
 337            $output .= '<ul>';
 338            foreach ($queries as $query) {
 339              if ($query['success']) {
 340                $output .= '<li class="success">'. $query['query'] .'</li>';
 341              }
 342              else {
 343                $output .= '<li class="failure"><strong>Failed:</strong> '. $query['query'] .'</li>';
 344              }
 345            }
 346            if (!count($queries)) {
 347              $output .= '<li class="none">No queries</li>';
 348            }
 349          }
 350          $output .= '</ul>';
 351        }
 352      }
 353      $output .= '</div>';
 354    }
 355    unset($_SESSION['update_results']);
 356    unset($_SESSION['update_success']);
 357  
 358    return $output;
 359  }
 360  
 361  function update_info_page() {
 362    // Change query-strings on css/js files to enforce reload for all users.
 363    _drupal_flush_css_js();
 364    // Flush the cache of all data for the update status module.
 365    if (db_table_exists('cache_update')) {
 366      cache_clear_all('*', 'cache_update', TRUE);
 367    }
 368  
 369    update_task_list('info');
 370    drupal_set_title('Drupal database update');
 371    $token = drupal_get_token('update');
 372    $output = '<p>Use this utility to update your database whenever a new release of Drupal or a module is installed.</p><p>For more detailed information, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.</p>';
 373    $output .= "<ol>\n";
 374    $output .= "<li><strong>Back up your database</strong>. This process will change your database values and in case of emergency you may need to revert to a backup.</li>\n";
 375    $output .= "<li><strong>Back up your code</strong>. Hint: when backing up module code, do not leave that backup in the 'modules' or 'sites/*/modules' directories as this may confuse Drupal's auto-discovery mechanism.</li>\n";
 376    $output .= '<li>Put your site into <a href="'. base_path() .'?q=admin/settings/site-maintenance">maintenance mode</a>.</li>'."\n";
 377    $output .= "<li>Install your new files in the appropriate location, as described in the handbook.</li>\n";
 378    $output .= "</ol>\n";
 379    $output .= "<p>When you have performed the steps above, you may proceed.</p>\n";
 380    $output .= '<form method="post" action="update.php?op=selection&amp;token='. $token .'"><p><input type="submit" value="Continue" /></p></form>';
 381    $output .= "\n";
 382    return $output;
 383  }
 384  
 385  function update_access_denied_page() {
 386    drupal_set_title('Access denied');
 387    return '<p>Access denied. You are not authorized to access this page. Please log in as the admin user (the first user you created). If you cannot log in, you will have to edit <code>settings.php</code> to bypass this access check. To do this:</p>
 388  <ol>
 389   <li>With a text editor find the settings.php file on your system. From the main Drupal directory that you installed all the files into, go to <code>sites/your_site_name</code> if such directory exists, or else to <code>sites/default</code> which applies otherwise.</li>
 390   <li>There is a line inside your settings.php file that says <code>$update_free_access = FALSE;</code>. Change it to <code>$update_free_access = TRUE;</code>.</li>
 391   <li>As soon as the update.php script is done, you must change the settings.php file back to its original form with <code>$update_free_access = FALSE;</code>.</li>
 392   <li>To avoid having this problem in future, remember to log in to your website as the admin user (the user you first created) before you backup your database at the beginning of the update process.</li>
 393  </ol>';
 394  }
 395  
 396  /**
 397   * Create the batch table.
 398   *
 399   * This is part of the Drupal 5.x to 6.x migration.
 400   */
 401  function update_create_batch_table() {
 402  
 403    // If batch table exists, update is not necessary
 404    if (db_table_exists('batch')) {
 405      return;
 406    }
 407  
 408    $schema['batch'] = array(
 409      'fields' => array(
 410        'bid'       => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE),
 411        'token'     => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE),
 412        'timestamp' => array('type' => 'int', 'not null' => TRUE),
 413        'batch'     => array('type' => 'text', 'not null' => FALSE, 'size' => 'big')
 414      ),
 415      'primary key' => array('bid'),
 416      'indexes' => array('token' => array('token')),
 417    );
 418  
 419    $ret = array();
 420    db_create_table($ret, 'batch', $schema['batch']);
 421    return $ret;
 422  }
 423  
 424  /**
 425   * Disable anything in the {system} table that is not compatible with the
 426   * current version of Drupal core.
 427   */
 428  function update_fix_compatibility() {
 429    $ret = array();
 430    $incompatible = array();
 431    $query = db_query("SELECT name, type, status FROM {system} WHERE status = 1 AND type IN ('module','theme')");
 432    while ($result = db_fetch_object($query)) {
 433      if (update_check_incompatibility($result->name, $result->type)) {
 434        $incompatible[] = $result->name;
 435      }
 436    }
 437    if (!empty($incompatible)) {
 438      $ret[] = update_sql("UPDATE {system} SET status = 0 WHERE name IN ('". implode("','", $incompatible) ."')");
 439    }
 440    return $ret;
 441  }
 442  
 443  /**
 444   * Helper function to test compatibility of a module or theme.
 445   */
 446  function update_check_incompatibility($name, $type = 'module') {
 447    static $themes, $modules;
 448  
 449    // Store values of expensive functions for future use.
 450    if (empty($themes) || empty($modules)) {
 451      $themes = _system_theme_data();
 452      $modules = module_rebuild_cache();
 453    }
 454  
 455    if ($type == 'module' && isset($modules[$name])) {
 456      $file = $modules[$name];
 457    }
 458    else if ($type == 'theme' && isset($themes[$name])) {
 459      $file = $themes[$name];
 460    }
 461    if (!isset($file)
 462        || !isset($file->info['core'])
 463        || $file->info['core'] != DRUPAL_CORE_COMPATIBILITY
 464        || version_compare(phpversion(), $file->info['php']) < 0) {
 465      return TRUE;
 466    }
 467    return FALSE;
 468  }
 469  
 470  /**
 471   * Perform Drupal 5.x to 6.x updates that are required for update.php
 472   * to function properly.
 473   *
 474   * This function runs when update.php is run the first time for 6.x,
 475   * even before updates are selected or performed.  It is important
 476   * that if updates are not ultimately performed that no changes are
 477   * made which make it impossible to continue using the prior version.
 478   * Just adding columns is safe.  However, renaming the
 479   * system.description column to owner is not.  Therefore, we add the
 480   * system.owner column and leave it to system_update_6008() to copy
 481   * the data from description and remove description. The same for
 482   * renaming locales_target.locale to locales_target.language, which
 483   * will be finished by locale_update_6002().
 484   */
 485  function update_fix_d6_requirements() {
 486    $ret = array();
 487  
 488    if (drupal_get_installed_schema_version('system') < 6000 && !variable_get('update_d6_requirements', FALSE)) {
 489      $spec = array('type' => 'int', 'size' => 'small', 'default' => 0, 'not null' => TRUE);
 490      db_add_field($ret, 'cache', 'serialized', $spec);
 491      db_add_field($ret, 'cache_filter', 'serialized', $spec);
 492      db_add_field($ret, 'cache_page', 'serialized', $spec);
 493      db_add_field($ret, 'cache_menu', 'serialized', $spec);
 494  
 495      db_add_field($ret, 'system', 'info', array('type' => 'text'));
 496      db_add_field($ret, 'system', 'owner', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''));
 497      if (db_table_exists('locales_target')) {
 498        db_add_field($ret, 'locales_target', 'language', array('type' => 'varchar', 'length' => 12, 'not null' => TRUE, 'default' => ''));
 499      }
 500      if (db_table_exists('locales_source')) {
 501        db_add_field($ret, 'locales_source', 'textgroup', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => 'default'));
 502        db_add_field($ret, 'locales_source', 'version', array('type' => 'varchar', 'length' => 20, 'not null' => TRUE, 'default' => 'none'));
 503      }
 504      variable_set('update_d6_requirements', TRUE);
 505  
 506      // Create the cache_block table. See system_update_6027() for more details.
 507      $schema['cache_block'] = array(
 508        'fields' => array(
 509          'cid'        => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''),
 510          'data'       => array('type' => 'blob', 'not null' => FALSE, 'size' => 'big'),
 511          'expire'     => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
 512          'created'    => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
 513          'headers'    => array('type' => 'text', 'not null' => FALSE),
 514          'serialized' => array('type' => 'int', 'size' => 'small', 'not null' => TRUE, 'default' => 0)
 515        ),
 516        'indexes' => array('expire' => array('expire')),
 517        'primary key' => array('cid'),
 518      );
 519      db_create_table($ret, 'cache_block', $schema['cache_block']);
 520  
 521      // Create the semaphore table now -- the menu system after 6.15 depends on
 522      // this table, and menu code runs in updates prior to the table being
 523      // created in its original update function, system_update_6054().
 524      $schema['semaphore'] = array(
 525        'fields' => array(
 526          'name' => array(
 527            'type' => 'varchar',
 528            'length' => 255,
 529            'not null' => TRUE,
 530            'default' => ''),
 531          'value' => array(
 532            'type' => 'varchar',
 533            'length' => 255,
 534            'not null' => TRUE,
 535            'default' => ''),
 536          'expire' => array(
 537            'type' => 'float',
 538            'size' => 'big',
 539            'not null' => TRUE),
 540          ),
 541        'indexes' => array('expire' => array('expire')),
 542        'primary key' => array('name'),
 543      );
 544      db_create_table($ret, 'semaphore', $schema['semaphore']);
 545    }
 546  
 547    return $ret;
 548  }
 549  
 550  /**
 551   * Add the update task list to the current page.
 552   */
 553  function update_task_list($active = NULL) {
 554    // Default list of tasks.
 555    $tasks = array(
 556      'info' => 'Overview',
 557      'select' => 'Select updates',
 558      'run' => 'Run updates',
 559      'finished' => 'Review log',
 560    );
 561  
 562    drupal_set_content('left', theme('task_list', $tasks, $active));
 563  }
 564  
 565  /**
 566   * Check update requirements and report any errors.
 567   */
 568  function update_check_requirements() {
 569    // Check the system module requirements only.
 570    $requirements = module_invoke('system', 'requirements', 'update');
 571    $severity = drupal_requirements_severity($requirements);
 572  
 573    // If there are issues, report them.
 574    if ($severity != REQUIREMENT_OK) {
 575      foreach ($requirements as $requirement) {
 576        if (isset($requirement['severity']) && $requirement['severity'] != REQUIREMENT_OK) {
 577          $message = isset($requirement['description']) ? $requirement['description'] : '';
 578          if (isset($requirement['value']) && $requirement['value']) {
 579            $message .= ' (Currently using '. $requirement['title'] .' '. $requirement['value'] .')';
 580          }
 581          drupal_set_message($message, 'warning');
 582        }
 583      }
 584    }
 585  }
 586  
 587  // Some unavoidable errors happen because the database is not yet up-to-date.
 588  // Our custom error handler is not yet installed, so we just suppress them.
 589  ini_set('display_errors', FALSE);
 590  
 591  require_once  './includes/bootstrap.inc';
 592  
 593  // We only load DRUPAL_BOOTSTRAP_CONFIGURATION for the update requirements
 594  // check to avoid reaching the PHP memory limit.
 595  $op = isset($_REQUEST['op']) ? $_REQUEST['op'] : '';
 596  if (empty($op)) {
 597    // Minimum load of components.
 598    drupal_bootstrap(DRUPAL_BOOTSTRAP_CONFIGURATION);
 599  
 600    require_once  './includes/install.inc';
 601    require_once  './includes/file.inc';
 602    require_once  './modules/system/system.install';
 603  
 604    // Load module basics.
 605    include_once  './includes/module.inc';
 606    $module_list['system']['filename'] = 'modules/system/system.module';
 607    $module_list['filter']['filename'] = 'modules/filter/filter.module';
 608    module_list(TRUE, FALSE, FALSE, $module_list);
 609    drupal_load('module', 'system');
 610    drupal_load('module', 'filter');
 611  
 612    // Set up $language, since the installer components require it.
 613    drupal_init_language();
 614  
 615    // Set up theme system for the maintenance page.
 616    drupal_maintenance_theme();
 617  
 618    // Check the update requirements for Drupal.
 619    update_check_requirements();
 620  
 621    // Display the warning messages (if any) in a dedicated maintenance page,
 622    // or redirect to the update information page if no message.
 623    $messages = drupal_set_message();
 624    if (!empty($messages['warning'])) {
 625      drupal_maintenance_theme();
 626      print theme('update_page', '<form method="post" action="update.php?op=info"><input type="submit" value="Continue" /></form>', FALSE);
 627      exit;
 628    }
 629    install_goto('update.php?op=info');
 630  }
 631  
 632  drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
 633  drupal_maintenance_theme();
 634  
 635  // This must happen *after* drupal_bootstrap(), since it calls
 636  // variable_(get|set), which only works after a full bootstrap.
 637  update_create_batch_table();
 638  
 639  // Turn error reporting back on. From now on, only fatal errors (which are
 640  // not passed through the error handler) will cause a message to be printed.
 641  ini_set('display_errors', TRUE);
 642  
 643  // Access check:
 644  if (!empty($update_free_access) || $user->uid == 1) {
 645  
 646    include_once  './includes/install.inc';
 647    include_once  './includes/batch.inc';
 648    drupal_load_updates();
 649  
 650    update_fix_d6_requirements();
 651    update_fix_compatibility();
 652  
 653    $op = isset($_REQUEST['op']) ? $_REQUEST['op'] : '';
 654    switch ($op) {
 655      case 'selection':
 656        if (isset($_GET['token']) && $_GET['token'] == drupal_get_token('update')) {
 657          $output = update_selection_page();
 658          break;
 659        }
 660  
 661      case 'Update':
 662        if (isset($_GET['token']) && $_GET['token'] == drupal_get_token('update')) {
 663          update_batch();
 664          break;
 665        }
 666  
 667      // update.php ops
 668      case 'info':
 669        $output = update_info_page();
 670        break;
 671  
 672      case 'results':
 673        $output = update_results_page();
 674        break;
 675  
 676      // Regular batch ops : defer to batch processing API
 677      default:
 678        update_task_list('run');
 679        $output = _batch_page();
 680        break;
 681    }
 682  }
 683  else {
 684    $output = update_access_denied_page();
 685  }
 686  if (isset($output) && $output) {
 687    // We defer the display of messages until all updates are done.
 688    $progress_page = ($batch = batch_get()) && isset($batch['running']);
 689    print theme('update_page', $output, !$progress_page);
 690  }