C:/drupal/update.php

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<?php
// $Id: update.php,v 1.254 2008/04/14 17:48:33 dries Exp $

define('MAINTENANCE_MODE', 'update');

function db_add_column(&$ret, $table, $column, $type, $attributes = array()) {
  if (array_key_exists('not null', $attributes) and $attributes['not null']) {
    $not_null = 'NOT NULL';
  }
  if (array_key_exists('default', $attributes)) {
    if (is_null($attributes['default'])) {
      $default_val = 'NULL';
      $default = 'default NULL';
    }
    elseif ($attributes['default'] === FALSE) {
      $default = '';
    }
    else {
      $default_val = "$attributes[default]";
      $default = "default $attributes[default]";
    }
  }

  $ret[] = update_sql("ALTER TABLE {" . $table . "} ADD $column $type");
  if (!empty($default)) {
    $ret[] = update_sql("ALTER TABLE {" . $table . "} ALTER $column SET $default");
  }
  if (!empty($not_null)) {
    if (!empty($default)) {
      $ret[] = update_sql("UPDATE {" . $table . "} SET $column = $default_val");
    }
    $ret[] = update_sql("ALTER TABLE {" . $table . "} ALTER $column SET NOT NULL");
  }
}

function db_change_column(&$ret, $table, $column, $column_new, $type, $attributes = array()) {
  if (array_key_exists('not null', $attributes) and $attributes['not null']) {
    $not_null = 'NOT NULL';
  }
  if (array_key_exists('default', $attributes)) {
    if (is_null($attributes['default'])) {
      $default_val = 'NULL';
      $default = 'default NULL';
    }
    elseif ($attributes['default'] === FALSE) {
      $default = '';
    }
    else {
      $default_val = "$attributes[default]";
      $default = "default $attributes[default]";
    }
  }

  $ret[] = update_sql("ALTER TABLE {" . $table . "} RENAME $column TO " . $column . "_old");
  $ret[] = update_sql("ALTER TABLE {" . $table . "} ADD $column_new $type");
  $ret[] = update_sql("UPDATE {" . $table . "} SET $column_new = " . $column . "_old");
  if ($default) {
    $ret[] = update_sql("ALTER TABLE {" . $table . "} ALTER $column_new SET $default");
  }
  if ($not_null) {
    $ret[] = update_sql("ALTER TABLE {" . $table . "} ALTER $column_new SET NOT NULL");
  }
  $ret[] = update_sql("ALTER TABLE {" . $table . "} DROP " . $column . "_old");
}

function update_do_one($module, $number, &$context) {
  // If updates for this module have been aborted
  // in a previous step, go no further.
  if (!empty($context['results'][$module]['#abort'])) {
    return;
  }

  $function = $module . '_update_' . $number;
  if (function_exists($function)) {
    $ret = $function($context['sandbox']);
  }

  if (isset($ret['#finished'])) {
    $context['finished'] = $ret['#finished'];
    unset($ret['#finished']);
  }

  if (!isset($context['results'][$module])) {
    $context['results'][$module] = array();
  }
  if (!isset($context['results'][$module][$number])) {
    $context['results'][$module][$number] = array();
  }
  $context['results'][$module][$number] = array_merge($context['results'][$module][$number], $ret);

  if (!empty($ret['#abort'])) {
    $context['results'][$module]['#abort'] = TRUE;
  }
  // Record the schema update if it was completed successfully.
  if ($context['finished'] == 1 && empty($context['results'][$module]['#abort'])) {
    drupal_set_installed_schema_version($module, $number);
  }

  $context['message'] = 'Updating ' . check_plain($module) . ' module';
}

function update_selection_page() {
  $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>';
  $output .= '<p>Click Update to start the update process.</p>';

  drupal_set_title('Drupal database update');
  $output .= drupal_get_form('update_script_selection_form');

  update_task_list('select');

  return $output;
}

function update_script_selection_form() {
  $form = array();
  $form['start'] = array(
    '#tree' => TRUE,
    '#type' => 'fieldset',
    '#title' => 'Select versions',
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
  );

  // Ensure system.module's updates appear first
  $form['start']['system'] = array();

  $modules = drupal_get_installed_schema_version(NULL, FALSE, TRUE);
  foreach ($modules as $module => $schema_version) {
    $updates = drupal_get_schema_versions($module);
    // Skip incompatible module updates completely, otherwise test schema versions.
    if (!update_check_incompatibility($module) && $updates !== FALSE && $schema_version >= 0) {
      // module_invoke returns NULL for nonexisting hooks, so if no updates
      // are removed, it will == 0.
      $last_removed = module_invoke($module, 'update_last_removed');
      if ($schema_version < $last_removed) {
        $form['start'][$module] = array(
          '#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.',
          '#prefix' => '<div class="warning">',
          '#suffix' => '</div>',
        );
        $form['start']['#collapsed'] = FALSE;
        continue;
      }
      $updates = drupal_map_assoc($updates);
      $updates[] = 'No updates available';
      $default = $schema_version;
      foreach (array_keys($updates) as $update) {
        if ($update > $schema_version) {
          $default = $update;
          break;
        }
      }
      $form['start'][$module] = array(
        '#type' => 'select',
        '#title' => $module . ' module',
        '#default_value' => $default,
        '#options' => $updates,
      );
    }
  }

  $form['has_js'] = array(
    '#type' => 'hidden',
    '#default_value' => FALSE,
    '#attributes' => array('id' => 'edit-has_js'),
  );
  $form['submit'] = array(
    '#type' => 'submit',
    '#value' => 'Update',
  );
  return $form;
}

function update_batch() {
  global $base_url;

  $operations = array();
  // Set the installed version so updates start at the correct place.
  foreach ($_POST['start'] as $module => $version) {
    drupal_set_installed_schema_version($module, $version - 1);
    $updates = drupal_get_schema_versions($module);
    $max_version = max($updates);
    if ($version <= $max_version) {
      foreach ($updates as $update) {
        if ($update >= $version) {
          $operations[] = array('update_do_one', array($module, $update));
        }
      }
    }
  }
  $batch = array(
    'operations' => $operations,
    'title' => 'Updating',
    'init_message' => 'Starting updates',
    'error_message' => 'An unrecoverable error has occurred. You can find the error message below. It is advised to copy it to the clipboard for reference.',
    'finished' => 'update_finished',
  );
  batch_set($batch);
  batch_process($base_url . '/update.php?op=results', $base_url . '/update.php');
}

function update_finished($success, $results, $operations) {
  // clear the caches in case the data has been updated.
  drupal_flush_all_caches();

  $_SESSION['update_results'] = $results;
  $_SESSION['update_success'] = $success;
  $_SESSION['updates_remaining'] = $operations;
}

function update_results_page() {
  drupal_set_title('Drupal database update');
  // NOTE: we can't use l() here because the URL would point to 'update.php?q=admin'.
  $links[] = '<a href="' . base_path() . '">Main page</a>';
  $links[] = '<a href="' . base_path() . '?q=admin">Administration pages</a>';

  update_task_list();
  // Report end result
  if (module_exists('dblog')) {
    $log_message = ' All errors have been <a href="' . base_path() . '?q=admin/reports/dblog">logged</a>.';
  }
  else {
    $log_message = ' All errors have been logged.';
  }

  if ($_SESSION['update_success']) {
    $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.' . $log_message . '</p>';
  }
  else {
    list($module, $version) = array_pop(reset($_SESSION['updates_remaining']));
    $output = '<p class="error">The update process was aborted prematurely while running <strong>update #' . $version . ' in ' . $module . '.module</strong>.' . $log_message;
    if (module_exists('dblog')) {
      $output .= ' You may need to check the <code>watchdog</code> database table manually.';
    }
    $output .= '</p>';
  }

  if (!empty($GLOBALS['update_free_access'])) {
    $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>";
  }

  $output .= theme('item_list', $links);

  // Output a list of queries executed
  if (!empty($_SESSION['update_results'])) {
    $output .= '<div id="update-results">';
    $output .= '<h2>The following queries were executed</h2>';
    foreach ($_SESSION['update_results'] as $module => $updates) {
      $output .= '<h3>' . $module . ' module</h3>';
      foreach ($updates as $number => $queries) {
        if ($number != '#abort') {
          $output .= '<h4>Update #' . $number . '</h4>';
          $output .= '<ul>';
          foreach ($queries as $query) {
            if ($query['success']) {
              $output .= '<li class="success">' . $query['query'] . '</li>';
            }
            else {
              $output .= '<li class="failure"><strong>Failed:</strong> ' . $query['query'] . '</li>';
            }
          }
          if (!count($queries)) {
            $output .= '<li class="none">No queries</li>';
          }
        }
        $output .= '</ul>';
      }
    }
    $output .= '</div>';
  }
  unset($_SESSION['update_results']);
  unset($_SESSION['update_success']);

  return $output;
}

function update_info_page() {
  // Change query-strings on css/js files to enforce reload for all users.
  _drupal_flush_css_js();
  // Flush the cache of all data for the update status module.
  if (db_table_exists('cache_update')) {
    cache_clear_all('*', 'cache_update', TRUE);
  }

  update_task_list('info');
  drupal_set_title('Drupal database update');
  $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>';
  $output .= "<ol>\n";
  $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";
  $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";
  $output .= '<li>Put your site into <a href="' . base_path() . '?q=admin/settings/site-maintenance">maintenance mode</a>.</li>' . "\n";
  $output .= "<li>Install your new files in the appropriate location, as described in the handbook.</li>\n";
  $output .= "</ol>\n";
  $output .= "<p>When you have performed the steps above, you may proceed.</p>\n";
  $output .= '<form method="post" action="update.php?op=selection"><input type="submit" value="Continue" /></form>';
  $output .= "\n";
  return $output;
}

function update_access_denied_page() {
  drupal_set_title('Access denied');
  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>
<ol>
 <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>
 <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>
 <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>
 <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>
</ol>';
}

function update_create_batch_table() {

  // If batch table exists, update is not necessary
  if (db_table_exists('batch')) {
    return;
  }

  $schema['batch'] = array(
    'fields' => array(
      'bid'       => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE),
      'token'     => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE),
      'timestamp' => array('type' => 'int', 'not null' => TRUE),
      'batch'     => array('type' => 'text', 'not null' => FALSE, 'size' => 'big')
    ),
    'primary key' => array('bid'),
    'indexes' => array('token' => array('token')),
  );

  $ret = array();
  db_create_table($ret, 'batch', $schema['batch']);
  return $ret;
}

function update_fix_compatibility() {
  $ret = array();
  $incompatible = array();
  $query = db_query("SELECT name, type, status FROM {system} WHERE status = 1 AND type IN ('module','theme')");
  while ($result = db_fetch_object($query)) {
    if (update_check_incompatibility($result->name, $result->type)) {
      $incompatible[] = $result->name;
    }
  }
  if (!empty($incompatible)) {
    $ret[] = update_sql("UPDATE {system} SET status = 0 WHERE name IN ('" . implode("','", $incompatible) . "')");
  }
  return $ret;
}

function update_check_incompatibility($name, $type = 'module') {
  static $themes, $modules;

  // Store values of expensive functions for future use.
  if (empty($themes) || empty($modules)) {
    $themes = system_theme_data();
    $modules = module_rebuild_cache();
  }

  if ($type == 'module' && isset($modules[$name])) {
    $file = $modules[$name];
  }
  else if ($type == 'theme' && isset($themes[$name])) {
    $file = $themes[$name];
  }
  if (!isset($file)
      || !isset($file->info['core'])
      || $file->info['core'] != DRUPAL_CORE_COMPATIBILITY
      || version_compare(phpversion(), $file->info['php']) < 0) {
    return TRUE;
  }
  return FALSE;
}

function update_fix_d6_requirements() {
  $ret = array();

  if (drupal_get_installed_schema_version('system') < 6000 && !variable_get('update_d6_requirements', FALSE)) {
    $spec = array('type' => 'int', 'size' => 'small', 'default' => 0, 'not null' => TRUE);
    db_add_field($ret, 'cache', 'serialized', $spec);
    db_add_field($ret, 'cache_filter', 'serialized', $spec);
    db_add_field($ret, 'cache_page', 'serialized', $spec);
    db_add_field($ret, 'cache_menu', 'serialized', $spec);

    db_add_field($ret, 'system', 'info', array('type' => 'text'));
    db_add_field($ret, 'system', 'owner', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''));
    if (db_table_exists('locales_target')) {
      db_add_field($ret, 'locales_target', 'language', array('type' => 'varchar', 'length' => 12, 'not null' => TRUE, 'default' => ''));
    }
    if (db_table_exists('locales_source')) {
      db_add_field($ret, 'locales_source', 'textgroup', array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => 'default'));
      db_add_field($ret, 'locales_source', 'version', array('type' => 'varchar', 'length' => 20, 'not null' => TRUE, 'default' => 'none'));
    }
    variable_set('update_d6_requirements', TRUE);

    // Create the cache_block table. See system_update_6027() for more details.
    $schema['cache_block'] = array(
      'fields' => array(
        'cid'        => array('type' => 'varchar', 'length' => 255, 'not null' => TRUE, 'default' => ''),
        'data'       => array('type' => 'blob', 'not null' => FALSE, 'size' => 'big'),
        'expire'     => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
        'created'    => array('type' => 'int', 'not null' => TRUE, 'default' => 0),
        'headers'    => array('type' => 'text', 'not null' => FALSE),
        'serialized' => array('type' => 'int', 'size' => 'small', 'not null' => TRUE, 'default' => 0)
      ),
      'indexes' => array('expire' => array('expire')),
      'primary key' => array('cid'),
    );
    db_create_table($ret, 'cache_block', $schema['cache_block']);
  }

  return $ret;
}

function update_task_list($active = NULL) {
  // Default list of tasks.
  $tasks = array(
    'info' => 'Overview',
    'select' => 'Select updates',
    'run' => 'Run updates',
    'finished' => 'Review log',
  );

  drupal_set_content('left', theme('task_list', $tasks, $active));
}

function update_check_requirements() {
  // Check the system module requirements only.
  $requirements = module_invoke('system', 'requirements', 'update');
  $severity = drupal_requirements_severity($requirements);

  // If there are issues, report them.
  if ($severity != REQUIREMENT_OK) {
    foreach ($requirements as $requirement) {
      if (isset($requirement['severity']) && $requirement['severity'] != REQUIREMENT_OK) {
        $message = isset($requirement['description']) ? $requirement['description'] : '';
        if (isset($requirement['value']) && $requirement['value']) {
          $message .= ' (Currently using ' . $requirement['title'] . ' ' . $requirement['value'] . ')';
        }
        drupal_set_message($message, 'warning');
      }
    }
  }
}

// Some unavoidable errors happen because the database is not yet up-to-date.
// Our custom error handler is not yet installed, so we just suppress them.
ini_set('display_errors', FALSE);

require_once './includes/bootstrap.inc';

// We only load DRUPAL_BOOTSTRAP_CONFIGURATION for the update requirements
// check to avoid reaching the PHP memory limit.
$op = isset($_REQUEST['op']) ? $_REQUEST['op'] : '';
if (empty($op)) {
  // Minimum load of components.
  drupal_bootstrap(DRUPAL_BOOTSTRAP_CONFIGURATION);

  require_once './includes/install.inc';
  require_once './includes/file.inc';
  require_once './modules/system/system.install';

  // Load module basics.
  include_once './includes/module.inc';
  $module_list['system']['filename'] = 'modules/system/system.module';
  $module_list['filter']['filename'] = 'modules/filter/filter.module';
  module_list(TRUE, FALSE, FALSE, $module_list);
  drupal_load('module', 'system');
  drupal_load('module', 'filter');

  // Set up $language, since the installer components require it.
  drupal_init_language();

  // Set up theme system for the maintenance page.
  drupal_maintenance_theme();

  // Check the update requirements for Drupal.
  update_check_requirements();

  // Display the warning messages (if any) in a dedicated maintenance page,
  // or redirect to the update information page if no message.
  $messages = drupal_set_message();
  if (!empty($messages['warning'])) {
    drupal_maintenance_theme();
    print theme('update_page', '<form method="post" action="update.php?op=info"><input type="submit" value="Continue" /></form>', FALSE);
    exit;
  }
  install_goto('update.php?op=info');
}

drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);
drupal_maintenance_theme();

// This must happen *after* drupal_bootstrap(), since it calls
// variable_(get|set), which only works after a full bootstrap.
update_create_batch_table();

// Turn error reporting back on. From now on, only fatal errors (which are
// not passed through the error handler) will cause a message to be printed.
ini_set('display_errors', TRUE);

// Access check:
if (!empty($update_free_access) || $user->uid == 1) {

  include_once './includes/install.inc';
  include_once './includes/batch.inc';
  drupal_load_updates();

  update_fix_d6_requirements();
  update_fix_compatibility();

  $op = isset($_REQUEST['op']) ? $_REQUEST['op'] : '';
  switch ($op) {
    // update.php ops
    case 'info':
      $output = update_info_page();
      break;

    case 'selection':
      $output = update_selection_page();
      break;

    case 'Update':
      update_batch();
      break;

    case 'results':
      $output = update_results_page();
      break;

    // Regular batch ops : defer to batch processing API
    default:
      update_task_list('run');
      $output = _batch_page();
      break;
  }
}
else {
  $output = update_access_denied_page();
}
if (isset($output) && $output) {
  // We defer the display of messages until all updates are done.
  $progress_page = ($batch = batch_get()) && isset($batch['running']);
  print theme('update_page', $output, !$progress_page);
}

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