functions/prefs.php

   1 <?php
   2
   3 /**
   4  * prefs.php
   5  *
   6  * Copyright (c) 1999-2003 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This contains functions for manipulating user preferences
  10  *
  11  * $Id$
  12  */
  13
  14 require_once(SM_PATH . 'functions/global.php');
  15
  16 sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
  17 sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
  18
  19 $rg = ini_get('register_globals');
  20
  21 /* if php version >= 4.1 OR (4.0 AND $rg = off) */
  22 if ( !sqsession_is_registered('prefs_are_cached') ||
  23      !isset( $prefs_cache) ||
  24      !is_array( $prefs_cache) ||
  25      check_php_version(4,1) ||
  26      empty($rg)
  27    ) {
  28     $prefs_are_cached = false;
  29     $prefs_cache = array();
  30 }
  31
  32 if (isset($prefs_dsn) && !empty($prefs_dsn)) {
  33     require_once(SM_PATH . 'functions/db_prefs.php');
  34 } else {
  35     require_once(SM_PATH . 'functions/file_prefs.php');
  36 }
  37
  38 /* Hashing functions */
  39
  40 function getHashedFile($username, $dir, $datafile, $hash_search = true) {
  41     global $dir_hash_level;
  42
  43     /* Remove trailing slash from $dir if found */
  44     if (substr($dir, -1) == '/') {
  45         $dir = substr($dir, 0, strlen($dir) - 1);
  46     }
  47
  48     /* Compute the hash for this user and extract the hash directories. */
  49     $hash_dirs = computeHashDirs($username);
  50
  51     /* First, get and make sure the full hash directory exists. */
  52     $real_hash_dir = getHashedDir($username, $dir, $hash_dirs);
  53
  54     /* Set the value of our real data file. */
  55     $result = "$real_hash_dir/$datafile";
  56
  57     /* Check for this file in the real hash directory. */
  58     if ($hash_search && !@file_exists($result)) {
  59         /* First check the base directory, the most common location. */
  60         if (@file_exists("$dir/$datafile")) {
  61             rename("$dir/$datafile", $result);
  62
  63         /* Then check the full range of possible hash directories. */
  64         } else {
  65             $check_hash_dir = $dir;
  66             for ($h = 0; $h < 4; ++$h) {
  67                 $check_hash_dir .= '/' . $hash_dirs[$h];
  68                 if (@is_readable("$check_hash_dir/$datafile")) {
  69                     rename("$check_hash_dir/$datafile", $result);
  70                     break;
  71                 }
  72             }
  73         }
  74     }
  75
  76     /* Return the full hashed datafile path. */
  77     return ($result);
  78 }
  79
  80 function getHashedDir($username, $dir, $hash_dirs = '') {
  81     global $dir_hash_level;
  82
  83     /* Remove trailing slash from $dir if found */
  84     if (substr($dir, -1) == '/') {
  85         $dir = substr($dir, 0, strlen($dir) - 1);
  86     }
  87
  88     /* If necessary, populate the hash dir variable. */
  89     if ($hash_dirs == '') {
  90         $hash_dirs = computeHashDirs($username);
  91     }
  92
  93     /* Make sure the full hash directory exists. */
  94     $real_hash_dir = $dir;
  95     for ($h = 0; $h < $dir_hash_level; ++$h) {
  96         $real_hash_dir .= '/' . $hash_dirs[$h];
  97         if (!@is_dir($real_hash_dir)) {
  98             if (!@mkdir($real_hash_dir, 0770)) {
  99                 echo sprintf(_("Error creating directory %s."), $real_hash_dir) . '<br>' .
 100                      _("Could not create hashed directory structure!") . "<br>\n" .
 101                      _("Please contact your system administrator and report this error.") . "<br>\n";
 102                 exit;
 103             }
 104         }
 105     }
 106
 107     /* And return that directory. */
 108     return ($real_hash_dir);
 109 }
 110
 111 function computeHashDirs($username) {
 112     /* Compute the hash for this user and extract the hash directories. */
 113     $hash = base_convert(crc32($username), 10, 16);
 114     $hash_dirs = array();
 115     for ($h = 0; $h < 4; ++ $h) {
 116         $hash_dirs[] = substr($hash, $h, 1);
 117     }
 118
 119     /* Return our array of hash directories. */
 120     return ($hash_dirs);
 121 }
 122
 123 ?>