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