--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/includes/session.inc	Tue Dec 23 14:28:28 2008 +0100
@@ -0,0 +1,176 @@
+<?php
+// $Id: session.inc,v 1.44.2.1 2008/02/07 11:58:40 goba Exp $
+
+/**
+ * @file
+ * User session handling functions.
+ */
+
+function sess_open($save_path, $session_name) {
+  return TRUE;
+}
+
+function sess_close() {
+  return TRUE;
+}
+
+function sess_read($key) {
+  global $user;
+
+  // Write and Close handlers are called after destructing objects since PHP 5.0.5
+  // Thus destructors can use sessions but session handler can't use objects.
+  // So we are moving session closure before destructing objects.
+  register_shutdown_function('session_write_close');
+
+  // Handle the case of first time visitors and clients that don't store cookies (eg. web crawlers).
+  if (!isset($_COOKIE[session_name()])) {
+    $user = drupal_anonymous_user();
+    return '';
+  }
+
+  // Otherwise, if the session is still active, we have a record of the client's session in the database.
+  $user = db_fetch_object(db_query("SELECT u.*, s.* FROM {users} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE s.sid = '%s'", $key));
+
+  // We found the client's session record and they are an authenticated user
+  if ($user && $user->uid > 0) {
+    // This is done to unserialize the data member of $user
+    $user = drupal_unpack($user);
+
+    // Add roles element to $user
+    $user->roles = array();
+    $user->roles[DRUPAL_AUTHENTICATED_RID] = 'authenticated user';
+    $result = db_query("SELECT r.rid, r.name FROM {role} r INNER JOIN {users_roles} ur ON ur.rid = r.rid WHERE ur.uid = %d", $user->uid);
+    while ($role = db_fetch_object($result)) {
+      $user->roles[$role->rid] = $role->name;
+    }
+  }
+  // We didn't find the client's record (session has expired), or they are an anonymous user.
+  else {
+    $session = isset($user->session) ? $user->session : '';
+    $user = drupal_anonymous_user($session);
+  }
+
+  return $user->session;
+}
+
+function sess_write($key, $value) {
+  global $user;
+
+  // If saving of session data is disabled or if the client doesn't have a session,
+  // and one isn't being created ($value), do nothing.
+  if (!session_save_session() || (empty($_COOKIE[session_name()]) && empty($value))) {
+    return TRUE;
+  }
+
+  $result = db_result(db_query("SELECT COUNT(*) FROM {sessions} WHERE sid = '%s'", $key));
+
+  if (!$result) {
+    // Only save session data when when the browser sends a cookie. This keeps
+    // crawlers out of session table. This reduces memory and server load,
+    // and gives more useful statistics. We can't eliminate anonymous session
+    // table rows without breaking throttle module and "Who's Online" block.
+    if ($user->uid || $value || count($_COOKIE)) {
+      db_query("INSERT INTO {sessions} (sid, uid, cache, hostname, session, timestamp) VALUES ('%s', %d, %d, '%s', '%s', %d)", $key, $user->uid, isset($user->cache) ? $user->cache : '', ip_address(), $value, time());
+    }
+  }
+  else {
+    db_query("UPDATE {sessions} SET uid = %d, cache = %d, hostname = '%s', session = '%s', timestamp = %d WHERE sid = '%s'", $user->uid, isset($user->cache) ? $user->cache : '', ip_address(), $value, time(), $key);
+
+    // Last access time is updated no more frequently than once every 180 seconds.
+    // This reduces contention in the users table.
+    if ($user->uid && time() - $user->access > variable_get('session_write_interval', 180)) {
+      db_query("UPDATE {users} SET access = %d WHERE uid = %d", time(), $user->uid);
+    }
+  }
+
+  return TRUE;
+}
+
+/**
+ * Called when an anonymous user becomes authenticated or vice-versa.
+ */
+function sess_regenerate() {
+  $old_session_id = session_id();
+
+  // We code around http://bugs.php.net/bug.php?id=32802 by destroying
+  // the session cookie by setting expiration in the past (a negative
+  // value).  This issue only arises in PHP versions before 4.4.0,
+  // regardless of the Drupal configuration.
+  // TODO: remove this when we require at least PHP 4.4.0
+  if (isset($_COOKIE[session_name()])) {
+    setcookie(session_name(), '', time() - 42000, '/');
+  }
+
+  session_regenerate_id();
+
+  db_query("UPDATE {sessions} SET sid = '%s' WHERE sid = '%s'", session_id(), $old_session_id);
+}
+
+/**
+ * Counts how many users have sessions. Can count either anonymous sessions, authenticated sessions, or both.
+ *
+ * @param int $timestamp
+ *   A Unix timestamp representing a point of time in the past.
+ *   The default is 0, which counts all existing sessions.
+ * @param int $anonymous
+ *   TRUE counts only anonymous users.
+ *   FALSE counts only authenticated users.
+ *   Any other value will return the count of both authenticated and anonymous users.
+ * @return  int
+ *   The number of users with sessions.
+ */
+function sess_count($timestamp = 0, $anonymous = true) {
+  $query = $anonymous ? ' AND uid = 0' : ' AND uid > 0';
+  return db_result(db_query('SELECT COUNT(sid) AS count FROM {sessions} WHERE timestamp >= %d'. $query, $timestamp));
+}
+
+/**
+ * Called by PHP session handling with the PHP session ID to end a user's session.
+ *
+ * @param  string $sid
+ *   the session id
+ */
+function sess_destroy_sid($sid) {
+  db_query("DELETE FROM {sessions} WHERE sid = '%s'", $sid);
+}
+
+/**
+ * End a specific user's session
+ *
+ * @param  string $uid
+ *   the user id
+ */
+function sess_destroy_uid($uid) {
+  db_query('DELETE FROM {sessions} WHERE uid = %d', $uid);
+}
+
+function sess_gc($lifetime) {
+  // Be sure to adjust 'php_value session.gc_maxlifetime' to a large enough
+  // value. For example, if you want user sessions to stay in your database
+  // for three weeks before deleting them, you need to set gc_maxlifetime
+  // to '1814400'. At that value, only after a user doesn't log in after
+  // three weeks (1814400 seconds) will his/her session be removed.
+  db_query("DELETE FROM {sessions} WHERE timestamp < %d", time() - $lifetime);
+
+  return TRUE;
+}
+
+/**
+ * Determine whether to save session data of the current request.
+ *
+ * This function allows the caller to temporarily disable writing of session data,
+ * should the request end while performing potentially dangerous operations, such as
+ * manipulating the global $user object.  See http://drupal.org/node/218104 for usage
+ *
+ * @param $status
+ *   Disables writing of session data when FALSE, (re-)enables writing when TRUE.
+ * @return
+ *   FALSE if writing session data has been disabled. Otherwise, TRUE.
+ */
+function session_save_session($status = NULL) {
+  static $save_session = TRUE;
+  if (isset($status)) {
+    $save_session = $status;
+  }
+  return ($save_session);
+}