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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) 1999-2004 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 | |
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21 | if ( !sqsession_is_registered('prefs_are_cached') || |
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22 | !isset( $prefs_cache) || |
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23 | !is_array( $prefs_cache) |
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24 | ) { |
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25 | $prefs_are_cached = false; |
26 | $prefs_cache = array(); |
27 | } |
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28 | |
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29 | if (isset($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) { |
30 | require_once(SM_PATH . $prefs_backend); |
31 | } elseif (isset($prefs_dsn) && !empty($prefs_dsn)) { |
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32 | require_once(SM_PATH . 'functions/db_prefs.php'); |
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33 | } else { |
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34 | require_once(SM_PATH . 'functions/file_prefs.php'); |
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35 | } |
36 | |
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37 | /* Hashing functions */ |
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38 | |
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39 | /** |
40 | * Given a username and datafilename, this will return the path to the |
41 | * hashed location of that datafile. |
42 | * |
43 | * @param string username the username of the current user |
44 | * @param string dir the squirrelmail datadir |
45 | * @param string datafile the name of the file to open |
46 | * @param bool hash_seach default true |
47 | * @return string the hashed location of datafile |
48 | */ |
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49 | function getHashedFile($username, $dir, $datafile, $hash_search = true) { |
50 | global $dir_hash_level; |
51 | |
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52 | /* Remove trailing slash from $dir if found */ |
53 | if (substr($dir, -1) == '/') { |
54 | $dir = substr($dir, 0, strlen($dir) - 1); |
55 | } |
56 | |
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57 | /* Compute the hash for this user and extract the hash directories. */ |
58 | $hash_dirs = computeHashDirs($username); |
59 | |
60 | /* First, get and make sure the full hash directory exists. */ |
61 | $real_hash_dir = getHashedDir($username, $dir, $hash_dirs); |
62 | |
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63 | /* Set the value of our real data file, after we've removed unwanted characters. */ |
64 | $datafile = str_replace('/', '_', $datafile); |
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65 | $result = "$real_hash_dir/$datafile"; |
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66 | |
67 | /* Check for this file in the real hash directory. */ |
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68 | if ($hash_search && !@file_exists($result)) { |
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69 | /* First check the base directory, the most common location. */ |
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70 | if (@file_exists("$dir/$datafile")) { |
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71 | rename("$dir/$datafile", $result); |
72 | |
73 | /* Then check the full range of possible hash directories. */ |
74 | } else { |
75 | $check_hash_dir = $dir; |
76 | for ($h = 0; $h < 4; ++$h) { |
77 | $check_hash_dir .= '/' . $hash_dirs[$h]; |
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78 | if (@is_readable("$check_hash_dir/$datafile")) { |
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79 | rename("$check_hash_dir/$datafile", $result); |
80 | break; |
81 | } |
82 | } |
83 | } |
84 | } |
85 | |
86 | /* Return the full hashed datafile path. */ |
87 | return ($result); |
88 | } |
89 | |
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90 | /** |
91 | * Helper function for getHashedFile, given a username returns the hashed |
92 | * dir for that username. |
93 | * |
94 | * @param string username the username of the current user |
95 | * @param string dir the squirrelmail datadir |
96 | * @param string hash_dirs default '' |
97 | * @return the path to the hash dir for username |
98 | */ |
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99 | function getHashedDir($username, $dir, $hash_dirs = '') { |
100 | global $dir_hash_level; |
101 | |
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102 | /* Remove trailing slash from $dir if found */ |
103 | if (substr($dir, -1) == '/') { |
104 | $dir = substr($dir, 0, strlen($dir) - 1); |
105 | } |
106 | |
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107 | /* If necessary, populate the hash dir variable. */ |
108 | if ($hash_dirs == '') { |
109 | $hash_dirs = computeHashDirs($username); |
110 | } |
111 | |
112 | /* Make sure the full hash directory exists. */ |
113 | $real_hash_dir = $dir; |
114 | for ($h = 0; $h < $dir_hash_level; ++$h) { |
115 | $real_hash_dir .= '/' . $hash_dirs[$h]; |
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116 | if (!@is_dir($real_hash_dir)) { |
117 | if (!@mkdir($real_hash_dir, 0770)) { |
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118 | echo sprintf(_("Error creating directory %s."), $real_hash_dir) . '<br>' . |
119 | _("Could not create hashed directory structure!") . "<br>\n" . |
120 | _("Please contact your system administrator and report this error.") . "<br>\n"; |
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121 | exit; |
122 | } |
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123 | } |
124 | } |
125 | |
126 | /* And return that directory. */ |
127 | return ($real_hash_dir); |
128 | } |
129 | |
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130 | /** |
131 | * Helper function for getHashDir which does the actual hash calculation. |
132 | * |
133 | * @param string username the username to calculate the hash dir for |
134 | * @return array a list of hash dirs for this username |
135 | */ |
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136 | function computeHashDirs($username) { |
137 | /* Compute the hash for this user and extract the hash directories. */ |
138 | $hash = base_convert(crc32($username), 10, 16); |
139 | $hash_dirs = array(); |
140 | for ($h = 0; $h < 4; ++ $h) { |
141 | $hash_dirs[] = substr($hash, $h, 1); |
142 | } |
143 | |
144 | /* Return our array of hash directories. */ |
145 | return ($hash_dirs); |
146 | } |
147 | |
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148 | ?> |