functions/prefs.php

   1 <?php
   2
   3 /**
   4  * prefs.php
   5  *
   6  * Copyright (c) 1999-2002 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 global $prefs_are_cached, $prefs_cache;
  15
  16 if ( !session_is_registered('prefs_are_cached') ||
  17      !isset( $prefs_cache) ||
  18      !is_array( $prefs_cache) ||
  19      substr( phpversion(), 0, 3 ) == '4.1' ||
  20      substr( phpversion(), 0, 3 ) == '4.2' ) {
  21     $prefs_are_cached = false;
  22     $prefs_cache = array();
  23 }
  24
  25 if (isset($prefs_dsn) && !empty($prefs_dsn)) {
  26     require_once(SM_PATH . 'functions/db_prefs.php');
  27 } else {
  28     require_once(SM_PATH . 'functions/file_prefs.php');
  29 }
  30
  31 /* Hashing functions */
  32
  33 function getHashedFile($username, $dir, $datafile, $hash_search = true) {
  34     global $dir_hash_level;
  35
  36     /* Remove trailing slash from $dir if found */
  37     if (substr($dir, -1) == '/') {
  38         $dir = substr($dir, 0, strlen($dir) - 1);
  39     }
  40
  41     /* Compute the hash for this user and extract the hash directories. */
  42     $hash_dirs = computeHashDirs($username);
  43
  44     /* First, get and make sure the full hash directory exists. */
  45     $real_hash_dir = getHashedDir($username, $dir, $hash_dirs);
  46
  47     /* Set the value of our real data file. */
  48     $result = "$real_hash_dir/$datafile";
  49
  50     /* Check for this file in the real hash directory. */
  51     if ($hash_search && !@file_exists($result)) {
  52         /* First check the base directory, the most common location. */
  53         if (@file_exists("$dir/$datafile")) {
  54             rename("$dir/$datafile", $result);
  55
  56         /* Then check the full range of possible hash directories. */
  57         } else {
  58             $check_hash_dir = $dir;
  59             for ($h = 0; $h < 4; ++$h) {
  60                 $check_hash_dir .= '/' . $hash_dirs[$h];
  61                 if (@is_readable("$check_hash_dir/$datafile")) {
  62                     rename("$check_hash_dir/$datafile", $result);
  63                     break;
  64                 }
  65             }
  66         }
  67     }
  68
  69     /* Return the full hashed datafile path. */
  70     return ($result);
  71 }
  72
  73 function getHashedDir($username, $dir, $hash_dirs = '') {
  74     global $dir_hash_level;
  75
  76     /* Remove trailing slash from $dir if found */
  77     if (substr($dir, -1) == '/') {
  78         $dir = substr($dir, 0, strlen($dir) - 1);
  79     }
  80
  81     /* If necessary, populate the hash dir variable. */
  82     if ($hash_dirs == '') {
  83         $hash_dirs = computeHashDirs($username);
  84     }
  85
  86     /* Make sure the full hash directory exists. */
  87     $real_hash_dir = $dir;
  88     for ($h = 0; $h < $dir_hash_level; ++$h) {
  89         $real_hash_dir .= '/' . $hash_dirs[$h];
  90         if (!@is_dir($real_hash_dir)) {
  91             if (!@mkdir($real_hash_dir, 0770)) {
  92                 echo sprintf(_("Error creating directory %s."), $real_hash_dir) . '<br>' .
  93                      _("Could not create hashed directory structure!") . "<br>\n" .
  94                      _("Please contact your system administrator and report this error.") . "<br>\n";
  95                 exit;
  96             }
  97         }
  98     }
  99
 100     /* And return that directory. */
 101     return ($real_hash_dir);
 102 }
 103
 104 function computeHashDirs($username) {
 105     /* Compute the hash for this user and extract the hash directories. */
 106     $hash = base_convert(crc32($username), 10, 16);
 107     $hash_dirs = array();
 108     for ($h = 0; $h < 4; ++ $h) {
 109         $hash_dirs[] = substr($hash, $h, 1);
 110     }
 111
 112     /* Return our array of hash directories. */
 113     return ($hash_dirs);
 114 }
 115
 116 ?>