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1 | <?php |
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2 | |
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3 | /** |
4 | * prefs.php |
5 | * |
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6 | * Copyright (c) 1999-2003 The SquirrelMail Project Team |
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7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This contains functions for manipulating user preferences |
10 | * |
11 | * $Id$ |
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12 | * @package squirrelmail |
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13 | */ |
14 | |
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15 | /** Include global.php */ |
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16 | require_once(SM_PATH . 'functions/global.php'); |
17 | |
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18 | sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION ); |
19 | sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION ); |
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20 | |
21 | $rg = ini_get('register_globals'); |
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22 | |
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23 | /* if php version >= 4.1 OR (4.0 AND $rg = off) */ |
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24 | if ( !sqsession_is_registered('prefs_are_cached') || |
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25 | !isset( $prefs_cache) || |
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26 | !is_array( $prefs_cache) || |
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27 | check_php_version(4,1) || |
28 | empty($rg) |
29 | ) { |
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30 | $prefs_are_cached = false; |
31 | $prefs_cache = array(); |
32 | } |
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33 | |
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34 | if (isset($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) { |
35 | require_once(SM_PATH . $prefs_backend); |
36 | } elseif (isset($prefs_dsn) && !empty($prefs_dsn)) { |
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37 | require_once(SM_PATH . 'functions/db_prefs.php'); |
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38 | } else { |
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39 | require_once(SM_PATH . 'functions/file_prefs.php'); |
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40 | } |
41 | |
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42 | /* Hashing functions */ |
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43 | |
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44 | /** |
45 | * Given a username and datafilename, this will return the path to the |
46 | * hashed location of that datafile. |
47 | * |
48 | * @param string username the username of the current user |
49 | * @param string dir the squirrelmail datadir |
50 | * @param string datafile the name of the file to open |
51 | * @param bool hash_seach default true |
52 | * @return string the hashed location of datafile |
53 | */ |
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54 | function getHashedFile($username, $dir, $datafile, $hash_search = true) { |
55 | global $dir_hash_level; |
56 | |
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57 | /* Remove trailing slash from $dir if found */ |
58 | if (substr($dir, -1) == '/') { |
59 | $dir = substr($dir, 0, strlen($dir) - 1); |
60 | } |
61 | |
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62 | /* Compute the hash for this user and extract the hash directories. */ |
63 | $hash_dirs = computeHashDirs($username); |
64 | |
65 | /* First, get and make sure the full hash directory exists. */ |
66 | $real_hash_dir = getHashedDir($username, $dir, $hash_dirs); |
67 | |
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68 | /* Set the value of our real data file, after we've removed unwanted characters. */ |
69 | $datafile = str_replace('/', '_', $datafile); |
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70 | $result = "$real_hash_dir/$datafile"; |
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71 | |
72 | /* Check for this file in the real hash directory. */ |
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73 | if ($hash_search && !@file_exists($result)) { |
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74 | /* First check the base directory, the most common location. */ |
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75 | if (@file_exists("$dir/$datafile")) { |
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76 | rename("$dir/$datafile", $result); |
77 | |
78 | /* Then check the full range of possible hash directories. */ |
79 | } else { |
80 | $check_hash_dir = $dir; |
81 | for ($h = 0; $h < 4; ++$h) { |
82 | $check_hash_dir .= '/' . $hash_dirs[$h]; |
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83 | if (@is_readable("$check_hash_dir/$datafile")) { |
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84 | rename("$check_hash_dir/$datafile", $result); |
85 | break; |
86 | } |
87 | } |
88 | } |
89 | } |
90 | |
91 | /* Return the full hashed datafile path. */ |
92 | return ($result); |
93 | } |
94 | |
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95 | /** |
96 | * Helper function for getHashedFile, given a username returns the hashed |
97 | * dir for that username. |
98 | * |
99 | * @param string username the username of the current user |
100 | * @param string dir the squirrelmail datadir |
101 | * @param string hash_dirs default '' |
102 | * @return the path to the hash dir for username |
103 | */ |
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104 | function getHashedDir($username, $dir, $hash_dirs = '') { |
105 | global $dir_hash_level; |
106 | |
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107 | /* Remove trailing slash from $dir if found */ |
108 | if (substr($dir, -1) == '/') { |
109 | $dir = substr($dir, 0, strlen($dir) - 1); |
110 | } |
111 | |
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112 | /* If necessary, populate the hash dir variable. */ |
113 | if ($hash_dirs == '') { |
114 | $hash_dirs = computeHashDirs($username); |
115 | } |
116 | |
117 | /* Make sure the full hash directory exists. */ |
118 | $real_hash_dir = $dir; |
119 | for ($h = 0; $h < $dir_hash_level; ++$h) { |
120 | $real_hash_dir .= '/' . $hash_dirs[$h]; |
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121 | if (!@is_dir($real_hash_dir)) { |
122 | if (!@mkdir($real_hash_dir, 0770)) { |
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123 | echo sprintf(_("Error creating directory %s."), $real_hash_dir) . '<br>' . |
124 | _("Could not create hashed directory structure!") . "<br>\n" . |
125 | _("Please contact your system administrator and report this error.") . "<br>\n"; |
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126 | exit; |
127 | } |
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128 | } |
129 | } |
130 | |
131 | /* And return that directory. */ |
132 | return ($real_hash_dir); |
133 | } |
134 | |
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135 | /** |
136 | * Helper function for getHashDir which does the actual hash calculation. |
137 | * |
138 | * @param string username the username to calculate the hash dir for |
139 | * @return array a list of hash dirs for this username |
140 | */ |
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141 | function computeHashDirs($username) { |
142 | /* Compute the hash for this user and extract the hash directories. */ |
143 | $hash = base_convert(crc32($username), 10, 16); |
144 | $hash_dirs = array(); |
145 | for ($h = 0; $h < 4; ++ $h) { |
146 | $hash_dirs[] = substr($hash, $h, 1); |
147 | } |
148 | |
149 | /* Return our array of hash directories. */ |
150 | return ($hash_dirs); |
151 | } |
152 | |
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153 | ?> |