include/init.php

   1 <?php
   2
   3 /**
   4  * init.php -- initialisation file
   5  *
   6  * File should be loaded in every file in src/ or plugins that occupate an entire frame
   7  *
   8  * @copyright &copy; 2006 The SquirrelMail Project Team
   9  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
  10  * @version $Id$
  11  * @package squirrelmail
  12  */
  13
  14 /**
  15  * This is a development version so in order to track programmer mistakes we
  16  * set the error reporting to E_ALL
  17 FIXME: disabling this for now, because we now have $sm_debug_mode, but the problem with that is that we don't know what it will be until we have loaded the config file, a good 175 lines below after several important files have been included, etc.  For now, we'll trust that developers have turned on E_ALL in php.ini anyway, but this can be uncommented if not.
  18  */
  19 //error_reporting(E_ALL);
  20
  21
  22 /**
  23  * Make sure we have a page name
  24  *
  25  */
  26 if ( !defined('PAGE_NAME') ) define('PAGE_NAME', NULL);
  27
  28
  29 /**
  30  * If register_globals are on, unregister globals.
  31  * Second test covers boolean set as string (php_value register_globals off).
  32  */
  33 if ((bool) ini_get('register_globals') &&
  34     strtolower(ini_get('register_globals'))!='off') {
  35     /**
  36      * Remove all globals that are not reserved by PHP
  37      * 'value' and 'key' are used by foreach. Don't unset them inside foreach.
  38      */
  39     foreach ($GLOBALS as $key => $value) {
  40         switch($key) {
  41         case 'HTTP_POST_VARS':
  42         case '_POST':
  43         case 'HTTP_GET_VARS':
  44         case '_GET':
  45         case 'HTTP_COOKIE_VARS':
  46         case '_COOKIE':
  47         case 'HTTP_SERVER_VARS':
  48         case '_SERVER':
  49         case 'HTTP_ENV_VARS':
  50         case '_ENV':
  51         case 'HTTP_POST_FILES':
  52         case '_FILES':
  53         case '_REQUEST':
  54         case 'HTTP_SESSION_VARS':
  55         case '_SESSION':
  56         case 'GLOBALS':
  57         case 'key':
  58         case 'value':
  59             break;
  60         default:
  61             unset($GLOBALS[$key]);
  62         }
  63     }
  64     // Unset variables used in foreach
  65     unset($GLOBALS['key']);
  66     unset($GLOBALS['value']);
  67 }
  68
  69 /**
  70  * Used as a dummy value, e.g., for passing as an empty
  71  * hook argument (where the value is passed by reference,
  72  * and therefore NULL itself is not acceptable).
  73  */
  74 global $null;
  75 $null = NULL;
  76
  77 /**
  78  * The global $server_os variable will be "windows" if
  79  * we are working in a Windows environment or "*nix"
  80  * otherwise.
  81  */
  82 global $server_os;
  83 if (DIRECTORY_SEPARATOR == '\\') $server_os = 'windows'; else $server_os = '*nix';
  84
  85 /**
  86  * [#1518885] session.use_cookies = off breaks SquirrelMail
  87  *
  88  * When session cookies are not used, all http redirects, meta refreshes,
  89  * src/download.php and javascript URLs are broken. Setting must be set
  90  * before session is started.
  91  */
  92 if (!(bool)ini_get('session.use_cookies') ||
  93     ini_get('session.use_cookies') == 'off') {
  94     ini_set('session.use_cookies','1');
  95 }
  96
  97 /**
  98  * Initialize seed of random number generator.
  99  * We use a number of things to randomize input: current time in ms,
 100  * info about the remote client, info about the current process, the
 101  * randomness of uniqid and stat of the current file.
 102  *
 103  * We seed this here only once per init, not only to save cycles
 104  * but also to make the result of mt_rand more random (it now also
 105  * depends on the number of times mt_rand was called before in this
 106  * execution.
 107  */
 108 $seed = microtime() . $_SERVER['REMOTE_PORT'] . $_SERVER['REMOTE_ADDR'] . getmypid();
 109
 110 if (function_exists('getrusage')) {
 111     /* Avoid warnings with Win32 */
 112     $dat = @getrusage();
 113     if (isset($dat) && is_array($dat)) { $seed .= implode('', $dat); }
 114 }
 115
 116 if(!empty($_SERVER['UNIQUE_ID'])) {
 117     $seed .= $_SERVER['UNIQUE_ID'];
 118 }
 119
 120 $seed .= uniqid(mt_rand(),TRUE);
 121 $seed .= implode( '', stat( __FILE__) );
 122
 123 // mt_srand() uses an integer to seed, so we need to distill our
 124 // very large seed to something useful (without taking a sub-string,
 125 // the integer conversion of such a large number is always 0 on
 126 // many systems, but strangely, 9 hex numbers - even if larger
 127 // than a signed 32 bit integer - seem to be an acceptable "integer"
 128 // seed (perhaps it is used as unsigned?)...
 129 // we may want to revisit this and always force it to be less than
 130 // 2,147,483,647
 131 //
 132 $seed = hexdec(substr(md5($seed), 0, 9));
 133
 134 // PHP 4.2 and up don't require seeding, but their used seed algorithm
 135 // is of questionable quality, so we keep doing it ourselves. */
 136 mt_srand($seed);
 137
 138 /**
 139  * calculate SM_PATH and calculate the base_uri
 140  * assumptions made: init.php is only called from plugins or from the src dir.
 141  * files in the plugin directory may not be part of a subdirectory called "src"
 142  *
 143  */
 144 if (isset($_SERVER['SCRIPT_NAME'])) {
 145     $a = explode('/', $_SERVER['SCRIPT_NAME']);
 146 } elseif (isset($HTTP_SERVER_VARS['SCRIPT_NAME'])) {
 147     $a = explode('/', $HTTP_SERVER_VARS['SCRIPT_NAME']);
 148 } else {
 149     $error = 'Unable to detect script environment. Please test your PHP '
 150            . 'settings and send your PHP core configuration, $_SERVER and '
 151            . '$HTTP_SERVER_VARS contents to the SquirrelMail developers.';
 152     die($error);
 153 }
 154 $sSM_PATH = '';
 155 for($i = count($a) -2; $i > -1; --$i) {
 156     $sSM_PATH .= '../';
 157     if ($a[$i] === 'src' || $a[$i] === 'plugins') {
 158         break;
 159     }
 160 }
 161
 162 $base_uri = implode('/', array_slice($a, 0, $i)). '/';
 163
 164 define('SM_PATH',$sSM_PATH);
 165 define('SM_BASE_URI', $base_uri);
 166
 167
 168 /**
 169  * global var $bInit is used to check if initialisation took place.
 170  * At this moment it's a workarounf for the include of addrbook_search_html
 171  * inside compose.php. If we found a better way then remove this. Do only use
 172  * this var if you know for sure a page can be called stand alone and be included
 173  * in another file.
 174  */
 175 $bInit = true;
 176
 177 /**
 178  * This theme as a failsafe if no themes were found, or if we error
 179  * out before anything could be initialised.
 180  */
 181 $color = array();
 182 $color[0]  = '#DCDCDC';  /* light gray    TitleBar               */
 183 $color[1]  = '#800000';  /* red                                  */
 184 $color[2]  = '#CC0000';  /* light red     Warning/Error Messages */
 185 $color[3]  = '#A0B8C8';  /* green-blue    Left Bar Background    */
 186 $color[4]  = '#FFFFFF';  /* white         Normal Background      */
 187 $color[5]  = '#FFFFCC';  /* light yellow  Table Headers          */
 188 $color[6]  = '#000000';  /* black         Text on left bar       */
 189 $color[7]  = '#0000CC';  /* blue          Links                  */
 190 $color[8]  = '#000000';  /* black         Normal text            */
 191 $color[9]  = '#ABABAB';  /* mid-gray      Darker version of #0   */
 192 $color[10] = '#666666';  /* dark gray     Darker version of #9   */
 193 $color[11] = '#770000';  /* dark red      Special Folders color  */
 194 $color[12] = '#EDEDED';
 195 $color[13] = '#800000';  /* (dark red)    Color for quoted text -- > 1 quote */
 196 $color[14] = '#ff0000';  /* (red)         Color for quoted text -- >> 2 or more */
 197 $color[15] = '#002266';  /* (dark blue)   Unselectable folders */
 198 $color[16] = '#ff9933';  /* (orange)      Highlight color */
 199
 200 require(SM_PATH . 'include/constants.php');
 201 require(SM_PATH . 'functions/global.php');
 202 require(SM_PATH . 'functions/strings.php');
 203 require(SM_PATH . 'functions/arrays.php');
 204 require(SM_PATH . 'functions/files.php');
 205
 206 /* load default configuration */
 207 require(SM_PATH . 'config/config_default.php');
 208 /* reset arrays in default configuration */
 209 $ldap_server = array();
 210 $plugins = array();
 211 $fontsets = array();
 212 $aTemplateSet = array();
 213 $aTemplateSet[0]['ID'] = 'default';
 214 $aTemplateSet[0]['NAME'] = 'Default';
 215
 216 /* load site configuration */
 217 require(SM_PATH . 'config/config.php');
 218 /* load local configuration overrides */
 219 if (file_exists(SM_PATH . 'config/config_local.php')) {
 220     require(SM_PATH . 'config/config_local.php');
 221 }
 222
 223
 224 /**
 225  * Set PHP error reporting level based on the SquirrelMail debug mode
 226  */
 227 $error_level = 0;
 228 if ($sm_debug_mode & SM_DEBUG_MODE_SIMPLE)
 229     $error_level |= E_ERROR;
 230 if ($sm_debug_mode & SM_DEBUG_MODE_MODERATE
 231  || $sm_debug_mode & SM_DEBUG_MODE_ADVANCED)
 232     $error_level |= E_ALL;
 233 if ($sm_debug_mode & SM_DEBUG_MODE_STRICT)
 234     $error_level |= E_STRICT;
 235 error_reporting($error_level);
 236
 237
 238 /**
 239  * Detect SSL connections
 240  */
 241 $is_secure_connection = is_ssl_secured_connection();
 242
 243
 244 require(SM_PATH . 'functions/plugin.php');
 245 require(SM_PATH . 'include/languages.php');
 246 require(SM_PATH . 'class/template/Template.class.php');
 247 require(SM_PATH . 'class/error.class.php');
 248
 249 /**
 250  * If magic_quotes_runtime is on, SquirrelMail breaks in new and creative ways.
 251  * Force magic_quotes_runtime off.
 252  * tassium@squirrelmail.org - I put it here in the hopes that all SM code includes this.
 253  * If there's a better place, please let me know.
 254  */
 255 ini_set('magic_quotes_runtime','0');
 256
 257
 258 /* if running with magic_quotes_gpc then strip the slashes
 259    from POST and GET global arrays */
 260 if (function_exists('get_magic_quotes_gpc') && @get_magic_quotes_gpc()) {
 261     sqstripslashes($_GET);
 262     sqstripslashes($_POST);
 263 }
 264
 265
 266 /* strip any tags added to the url from PHP_SELF.
 267 This fixes hand crafted url XXS expoits for any
 268    page that uses PHP_SELF as the FORM action */
 269 $_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']);
 270
 271 $PHP_SELF = php_self();
 272
 273 /**
 274  * Initialize the session
 275  */
 276
 277 /** set the name of the session cookie */
 278 if (!isset($session_name) || !$session_name) {
 279     $session_name = 'SQMSESSID';
 280 }
 281
 282 /**
 283  * When session.auto_start is On we want to destroy/close the session
 284  */
 285 $sSessionAutostartName = session_name();
 286 $sSessionAutostartID = session_id();
 287 if (!empty($sSessionAutostartID) && $sSessionAutostartName !== $session_name) {
 288     $sCookiePath = ini_get('session.cookie_path');
 289     $sCookieDomain = ini_get('session.cookie_domain');
 290     // reset the cookie
 291     sqsetcookie($sSessionAutostartName,'',1,$sCookiePath,$sCookieDomain);
 292     @session_destroy();
 293     session_write_close();
 294 }
 295
 296 /**
 297  * includes from classes stored in the session
 298  */
 299 require(SM_PATH . 'class/mime.class.php');
 300
 301 ini_set('session.name' , $session_name);
 302 session_set_cookie_params (0, $base_uri);
 303 sqsession_is_active();
 304
 305 /**
 306  * When on login page, have to reset the user session, making
 307  * sure to save session restore data first
 308  */
 309 if (PAGE_NAME == 'login') {
 310     if (!sqGetGlobalVar('session_expired_post', $sep, SQ_SESSION))
 311         $sep = '';
 312     if (!sqGetGlobalVar('session_expired_location', $sel, SQ_SESSION))
 313         $sel = '';
 314     sqsession_destroy();
 315     session_write_close();
 316
 317     /**
 318      * in some rare instances, the session seems to stick
 319      * around even after destroying it (!!), so if it does,
 320      * we'll manually flatten the $_SESSION data
 321      */
 322     if (!empty($_SESSION))
 323         $_SESSION = array();
 324
 325     /**
 326      * Allow administrators to define custom session handlers
 327      * for SquirrelMail without needing to change anything in
 328      * php.ini (application-level).
 329      *
 330      * In config_local.php, admin needs to put:
 331      *
 332      *     $custom_session_handlers = array(
 333      *         'my_open_handler',
 334      *         'my_close_handler',
 335      *         'my_read_handler',
 336      *         'my_write_handler',
 337      *         'my_destroy_handler',
 338      *         'my_gc_handler',
 339      *     );
 340      *     session_module_name('user');
 341      *     session_set_save_handler(
 342      *         $custom_session_handlers[0],
 343      *         $custom_session_handlers[1],
 344      *         $custom_session_handlers[2],
 345      *         $custom_session_handlers[3],
 346      *         $custom_session_handlers[4],
 347      *         $custom_session_handlers[5]
 348      *     );
 349      *
 350      * We need to replicate that code once here because PHP has
 351      * long had a bug that resets the session handler mechanism
 352      * when the session data is also destroyed.  Because of this
 353      * bug, even administrators who define custom session handlers
 354      * via a PHP pre-load defined in php.ini (auto_prepend_file)
 355      * will still need to define the $custom_session_handlers array
 356      * in config_local.php.
 357      */
 358     global $custom_session_handlers;
 359     if (!empty($custom_session_handlers)) {
 360         $open    = $custom_session_handlers[0];
 361         $close   = $custom_session_handlers[1];
 362         $read    = $custom_session_handlers[2];
 363         $write   = $custom_session_handlers[3];
 364         $destroy = $custom_session_handlers[4];
 365         $gc      = $custom_session_handlers[5];
 366         session_module_name('user');
 367         session_set_save_handler($open, $close, $read, $write, $destroy, $gc);
 368     }
 369
 370     sqsession_is_active();
 371     session_regenerate_id();
 372
 373     // put session restore data back into session if necessary
 374     if (!empty($sel)) {
 375         sqsession_register($sel, 'session_expired_location');
 376         if (!empty($sep))
 377             sqsession_register($sep, 'session_expired_post');
 378     }
 379 }
 380
 381 /**
 382  * SquirrelMail internal version number -- DO NOT CHANGE
 383  * $sm_internal_version = array (release, major, minor)
 384  */
 385 $SQM_INTERNAL_VERSION = explode('.', SM_VERSION, 3);
 386 $SQM_INTERNAL_VERSION[2] = intval($SQM_INTERNAL_VERSION[2]);
 387
 388
 389 /* load prefs system; even when user not logged in, should be OK to do this here */
 390 require(SM_PATH . 'functions/prefs.php');
 391
 392
 393 /* if plugins are disabled only for one user and
 394  * the current user is NOT that user, turn them
 395  * back on
 396  */
 397 sqgetGlobalVar('username', $username, SQ_SESSION);
 398 if ($disable_plugins && !empty($disable_plugins_user)
 399  && $username != $disable_plugins_user) {
 400     $disable_plugins = false;
 401 }
 402
 403
 404 /* remove all plugins if they are disabled */
 405 if ($disable_plugins) {
 406    $plugins = array();
 407 }
 408
 409
 410 /**
 411  * Include Compatibility plugin if available.
 412  */
 413 if (!$disable_plugins && file_exists(SM_PATH . 'plugins/compatibility/functions.php'))
 414     include_once(SM_PATH . 'plugins/compatibility/functions.php');
 415
 416
 417 /**
 418  * MAIN PLUGIN LOADING CODE HERE
 419  * On init, we no longer need to load all plugin setup files.
 420  * Now, we load the statically generated hook registrations here
 421  * and let the hook calls include only the plugins needed.
 422  */
 423 $squirrelmail_plugin_hooks = array();
 424 if (!$disable_plugins && file_exists(SM_PATH . 'config/plugin_hooks.php')) {
 425 //FIXME: if we keep the plugin hooks array static like this, it seems like we should also keep the template files list in a static file too (when a new user session is started or the template set is changed, the code will dynamically iterate through the directory heirarchy of the template directory and catalog all the template files therein (and store the "catalog" in PHP session) -- instead, we could do that once at config-time and keep that static so SM can just include the file just like the line below)
 426     require(SM_PATH . 'config/plugin_hooks.php');
 427 }
 428
 429
 430 /**
 431  * Plugin authors note that the "config_override" hook used to be
 432  * executed here, but please adapt your plugin to use this "prefs_backend"
 433  * hook instead, making sure that it does NOT return anything, since
 434  * doing so will interfere with proper prefs system functionality.
 435  * Of course, otherwise, this hook may be used to do any configuration
 436  * overrides as needed, as well as set up a custom preferences backend.
 437  */
 438 $prefs_backend = do_hook('prefs_backend', $null);
 439 if (isset($prefs_backend) && !empty($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) {
 440     require(SM_PATH . $prefs_backend);
 441 } elseif (isset($prefs_dsn) && !empty($prefs_dsn)) {
 442     require(SM_PATH . 'functions/db_prefs.php');
 443 } else {
 444     require(SM_PATH . 'functions/file_prefs.php');
 445 }
 446
 447
 448
 449 /**
 450  * DISABLED.
 451  * Remove globalized session data in rg=on setups
 452  *
 453  * Code can be utilized when session is started, but data is not loaded.
 454  * We have already loaded configuration and other important vars. Can't
 455  * clean session globals here, beside, the cleanout of globals at the
 456  * top of this file will have removed anything this code would find anyway.
 457 if ((bool) @ini_get('register_globals') &&
 458     strtolower(ini_get('register_globals'))!='off') {
 459     foreach ($_SESSION as $key => $value) {
 460         unset($GLOBALS[$key]);
 461     }
 462 }
 463 */
 464
 465 sqsession_register(SM_BASE_URI,'base_uri');
 466
 467 /**
 468  * Retrieve the language cookie
 469  */
 470 if (! sqgetGlobalVar('squirrelmail_language',$squirrelmail_language,SQ_COOKIE)) {
 471     $squirrelmail_language = '';
 472 }
 473
 474
 475 /**
 476  * In some cases, buffering all output allows more complex functionality,
 477  * especially for plugins that want to add headers on hooks that are beyond
 478  * the point of output having been sent to the browser otherwise.
 479  *
 480  * Note that we don't turn this on any earlier since we want to allow plugins
 481  * to turn it on themselves via a configuration override on the prefs_backend
 482  * hook.
 483  *
 484  */
 485 if ($buffer_output) ob_start(!empty($buffered_output_handler) ? $buffered_output_handler : NULL);
 486
 487
 488 /**
 489  * Do something special for some pages. This is based on the PAGE_NAME constant
 490  * set at the top of every page.
 491  */
 492 $set_up_langage_after_template_setup = FALSE;
 493 switch (PAGE_NAME) {
 494     case 'style':
 495
 496         // need to get the right template set up
 497         //
 498         sqGetGlobalVar('templateid', $templateid, SQ_GET);
 499
 500         // sanitize just in case...
 501         //
 502         $templateid = preg_replace('/(\.\.\/){1,}/', '', $templateid);
 503
 504         // make sure given template actually is available
 505         //
 506         $found_templateset = false;
 507         for ($i = 0; $i < count($aTemplateSet); ++$i) {
 508             if ($aTemplateSet[$i]['ID'] == $templateid) {
 509                 $found_templateset = true;
 510                 break;
 511             }
 512         }
 513
 514 // FIXME: do we need/want to check here for actual (physical) presence of template sets?
 515         // selected template not available, fall back to default template
 516         //
 517         if (!$found_templateset) {
 518             $sTemplateID = Template::get_default_template_set();
 519         } else {
 520             $sTemplateID = $templateid;
 521         }
 522
 523         session_write_close();
 524         break;
 525
 526     case 'mailto':
 527         // nothing to do
 528         break;
 529
 530     case 'redirect':
 531         require(SM_PATH . 'functions/auth.php');
 532         //nobreak;
 533
 534     case 'login':
 535         require(SM_PATH . 'functions/display_messages.php' );
 536         require(SM_PATH . 'functions/page_header.php');
 537         require(SM_PATH . 'functions/html.php');
 538
 539         // reset template file cache
 540         //
 541         $sTemplateID = Template::get_default_template_set();
 542         Template::cache_template_file_hierarchy($sTemplateID, TRUE);
 543
 544         /**
 545          * Make sure icon variables are setup for the login page.
 546          */
 547         $icon_theme = $icon_themes[$icon_theme_def]['PATH'];
 548         /*
 549          * NOTE: The $icon_theme_path var should contain the path to the icon
 550          *       theme to use.  If the admin has disabled icons, or the user has
 551          *       set the icon theme to "None," no icons will be used.
 552          */
 553         $icon_theme_path = (!$use_icons || $icon_theme=='none') ? NULL : ($icon_theme == 'template' ? SM_PATH . Template::calculate_template_images_directory($sTemplateID) : $icon_theme);
 554
 555         break;
 556     default:
 557         require(SM_PATH . 'functions/display_messages.php' );
 558         require(SM_PATH . 'functions/page_header.php');
 559         require(SM_PATH . 'functions/html.php');
 560
 561
 562         /**
 563          * Check if we are logged in
 564          */
 565         require(SM_PATH . 'functions/auth.php');
 566
 567         if ( !sqsession_is_registered('user_is_logged_in') ) {
 568
 569             // use $message to indicate what logout text the user
 570             // will see... if 0, typical "You must be logged in"
 571             // if 1, information that the user session was saved
 572             // and will be resumed after (re)login
 573             //
 574             $message = 0;
 575
 576             //  First we store some information in the new session to prevent
 577             //  information-loss.
 578             //
 579             $session_expired_post = $_POST;
 580             $session_expired_location = PAGE_NAME;
 581             if (!sqsession_is_registered('session_expired_post')) {
 582                 sqsession_register($session_expired_post,'session_expired_post');
 583             }
 584             if (!sqsession_is_registered('session_expired_location')) {
 585                 sqsession_register($session_expired_location,'session_expired_location');
 586                 if ($session_expired_location == 'compose')
 587                     $message = 1;
 588             }
 589             // signout page will deal with users who aren't logged
 590             // in on its own; don't show error here
 591             //
 592             if ( PAGE_NAME == 'signout' ) {
 593                 return;
 594             }
 595
 596             /**
 597              * Initialize the template object (logout_error uses it)
 598              */
 599             /*
 600              * $sTemplateID is not initialized when a user is not logged in, so we
 601              * will use the config file defaults here.  If the neccesary variables
 602              * are not set, force a default value.
 603              */
 604             if (PAGE_NAME == 'squirrelmail_rpc') {
 605                 $sTemplateID = Template::get_rpc_template_set();
 606             } else {
 607                 $sTemplateID = Template::get_default_template_set();
 608             }
 609             $oTemplate = Template::construct_template($sTemplateID);
 610
 611             set_up_language($squirrelmail_language, true);
 612             if (!$message)
 613                 logout_error( _("You must be logged in to access this page.") );
 614             else
 615                 logout_error( _("Your session has expired, but will be resumed after logging in again.") );
 616             exit;
 617         }
 618
 619         sqgetGlobalVar('authz',$authz,SQ_SESSION);
 620
 621         /**
 622          * Setting the prefs backend
 623          */
 624         sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
 625         sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
 626
 627         if ( !sqsession_is_registered('prefs_are_cached') ||
 628             !isset( $prefs_cache) ||
 629             !is_array( $prefs_cache)) {
 630             $prefs_are_cached = false;
 631             $prefs_cache = false; //array();
 632         }
 633
 634         /**
 635          * initializing user settings
 636          */
 637         require(SM_PATH . 'include/load_prefs.php');
 638
 639         /**
 640          * We'll need this to later have a noframes version
 641          *
 642          * Check if the user has a language preference, but no cookie.
 643          * Send him a cookie with his language preference, if there is
 644          * such discrepancy.
 645          */
 646          $my_language = getPref($data_dir, $username, 'language');
 647          if ($my_language != $squirrelmail_language) {
 648              sqsetcookie('squirrelmail_language', $my_language, time()+2592000, $base_uri);
 649          }
 650
 651         $set_up_langage_after_template_setup = TRUE;
 652
 653         $timeZone = getPref($data_dir, $username, 'timezone');
 654
 655         /* Check to see if we are allowed to set the TZ environment variable.
 656          * We are able to do this if ...
 657          *   safe_mode is disabled OR
 658          *   safe_mode_allowed_env_vars is empty (you are allowed to set any) OR
 659          *   safe_mode_allowed_env_vars contains TZ
 660          */
 661         $tzChangeAllowed = (!ini_get('safe_mode')) ||
 662                             !strcmp(ini_get('safe_mode_allowed_env_vars'),'') ||
 663                             preg_match('/^([\w_]+,)*TZ/', ini_get('safe_mode_allowed_env_vars'));
 664
 665         if ( $timeZone != SMPREF_NONE && ($timeZone != "")
 666             && $tzChangeAllowed ) {
 667
 668             // get time zone key, if strict or custom strict timezones are used
 669             if (isset($time_zone_type) &&
 670                 ($time_zone_type == 1 || $time_zone_type == 3)) {
 671                 /* load time zone functions */
 672                 require(SM_PATH . 'include/timezones.php');
 673                 $realTimeZone = sq_get_tz_key($timeZone);
 674             } else {
 675                 $realTimeZone = $timeZone;
 676             }
 677
 678             // set time zone
 679             if ($realTimeZone) {
 680                 putenv("TZ=".$realTimeZone);
 681             }
 682         }
 683
 684         /**
 685          * php 5.1.0 added time zone functions. Set time zone with them in order
 686          * to prevent E_STRICT notices and allow time zone modifications in safe_mode.
 687          */
 688         if (function_exists('date_default_timezone_set')) {
 689             if ($timeZone != SMPREF_NONE && $timeZone != "") {
 690                 date_default_timezone_set($timeZone);
 691             } else {
 692                 // interface runs on server's time zone. Remove php E_STRICT complains
 693                 $default_timezone = @date_default_timezone_get();
 694                 date_default_timezone_set($default_timezone);
 695             }
 696         }
 697         break;
 698 }
 699
 700 /*
 701  * $sTemplateID is not initialized when a user is not logged in, so we
 702  * will use the config file defaults here.  If the neccesary variables
 703  * are not set, force a default value.
 704  *
 705  * If the user is logged in, $sTemplateID will be set in load_prefs.php,
 706  * so we shouldn't change it here.
 707  */
 708 if (!isset($sTemplateID)) {
 709     if (PAGE_NAME == 'squirrelmail_rpc') {
 710         $sTemplateID = Template::get_rpc_template_set();
 711     } else {
 712         $sTemplateID = Template::get_default_template_set();
 713     }
 714     $icon_theme_path = !$use_icons ? NULL : Template::calculate_template_images_directory($sTemplateID);
 715 }
 716
 717 // template object may have already been constructed in load_prefs.php
 718 //
 719 if (empty($oTemplate)) {
 720     $oTemplate = Template::construct_template($sTemplateID);
 721 }
 722
 723 // We want some variables to always be available to the template
 724 //
 725 $oTemplate->assign('javascript_on',
 726     (sqGetGlobalVar('user_is_logged_in', $user_is_logged_in, SQ_SESSION)
 727      ?  checkForJavascript() : 0));
 728 $oTemplate->assign('base_uri', sqm_baseuri());
 729 $always_include = array('sTemplateID', 'icon_theme_path');
 730 foreach ($always_include as $var) {
 731     $oTemplate->assign($var, (isset($$var) ? $$var : NULL));
 732 }
 733
 734 // A few output elements are used often, so just get them once here
 735 //
 736 $nbsp = $oTemplate->fetch('non_breaking_space.tpl');
 737 $br = $oTemplate->fetch('line_break.tpl');
 738
 739
 740 /**
 741  * Set up the language.
 742  *
 743  * This code block corresponds to the *default* block of the switch
 744  * statement above, but the language cannot be set up until after the
 745  * template is instantiated, so we set $set_up_langage_after_template_setup
 746  * above and do the linguistic stuff now.
 747  */
 748 if ($set_up_langage_after_template_setup) {
 749     $err=set_up_language(getPref($data_dir, $username, 'language'));
 750
 751     // Japanese translation used without mbstring support
 752     if ($err==2) {
 753         $sError = "<p>Your administrator needs to have PHP installed with the multibyte string extension enabled (using configure option --enable-mbstring).</p>\n"
 754                 . "<p>This system has assumed that you accidently switched to Japanese and has reverted your language preference to English.</p>\n"
 755                 . "<p>Please refresh this page in order to continue using your webmail.</p>\n";
 756         error_box($sError);
 757     }
 758 }
 759
 760
 761 /**
 762  * Initialize our custom error handler object
 763  */
 764 $oErrorHandler = new ErrorHandler($oTemplate,'error_message.tpl');
 765
 766
 767 /**
 768  * Activate custom error handling
 769  */
 770 if (version_compare(PHP_VERSION, "4.3.0", ">=")) {
 771     $oldErrorHandler = set_error_handler(array($oErrorHandler, 'SquirrelMailErrorhandler'));
 772 } else {
 773     $oldErrorHandler = set_error_handler('SquirrelMailErrorhandler');
 774 }
 775
 776
 777 // ============================================================================
 778 // ================= End of Live Code, Beginning of Functions =================
 779 // ============================================================================
 780
 781
 782 /**
 783  * Javascript support detection function
 784  * @param boolean $reset recheck javascript support if set to true.
 785  * @return integer SMPREF_JS_ON or SMPREF_JS_OFF ({@see include/constants.php})
 786  * @since 1.5.1
 787  */
 788 function checkForJavascript($reset = FALSE) {
 789   global $data_dir, $username, $javascript_on, $javascript_setting;
 790
 791   if ( !$reset && sqGetGlobalVar('javascript_on', $javascript_on, SQ_SESSION) )
 792     return $javascript_on;
 793
 794   $user_is_logged_in = FALSE;
 795   if ( $reset || !isset($javascript_setting) )
 796     $javascript_setting = getPref($data_dir, $username, 'javascript_setting', SMPREF_JS_AUTODETECT);
 797
 798   if ( !sqGetGlobalVar('new_js_autodetect_results', $js_autodetect_results) &&
 799        !sqGetGlobalVar('js_autodetect_results', $js_autodetect_results) )
 800     $js_autodetect_results = SMPREF_JS_OFF;
 801
 802   if ( $javascript_setting == SMPREF_JS_AUTODETECT )
 803     $javascript_on = $js_autodetect_results;
 804   else
 805     $javascript_on = $javascript_setting;
 806
 807   sqsession_register($javascript_on, 'javascript_on');
 808   return $javascript_on;
 809 }
 810
 811 function sqm_baseuri() {
 812     global $base_uri;
 813     return $base_uri;
 814 }