Viewing file:  prefs.php (5.24 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
/**
* prefs.php
*
* This contains functions for filebased user prefs locations
*
* @copyright 1999-2010 The SquirrelMail Project Team
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @version $Id: prefs.php 13893 2010-01-25 02:47:41Z pdontthink $
* @package squirrelmail
* @subpackage prefs
*/
/** Include global.php */
require_once(SM_PATH . 'functions/global.php');
require_once(SM_PATH . 'functions/plugin.php');
/** include this for error messages */
include_once(SM_PATH . 'functions/display_messages.php');
sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
$rg = ini_get('register_globals');
if ( !sqsession_is_registered('prefs_are_cached') ||
!isset($prefs_cache) ||
!is_array($prefs_cache)
) {
$prefs_are_cached = false;
$prefs_cache = array();
}
$prefs_backend = do_hook_function('prefs_backend');
if (isset($prefs_backend) && !empty($prefs_backend) && file_exists(SM_PATH . $prefs_backend)) {
require_once(SM_PATH . $prefs_backend);
} elseif (isset($prefs_dsn) && !empty($prefs_dsn)) {
require_once(SM_PATH . 'functions/db_prefs.php');
} else {
require_once(SM_PATH . 'functions/file_prefs.php');
}
/* Hashing functions */
/**
* Given a username and datafilename, this will return the path to the
* hashed location of that datafile.
*
* @param string username the username of the current user
* @param string dir the squirrelmail datadir
* @param string datafile the name of the file to open
* @param bool hash_seach default true
* @return string the hashed location of datafile
*/
function getHashedFile($username, $dir, $datafile, $hash_search = true) {
global $dir_hash_level;
/* Remove trailing slash from $dir if found */
if (substr($dir, -1) == '/') {
$dir = substr($dir, 0, strlen($dir) - 1);
}
/* Compute the hash for this user and extract the hash directories. */
$hash_dirs = computeHashDirs($username);
/* First, get and make sure the full hash directory exists. */
$real_hash_dir = getHashedDir($username, $dir, $hash_dirs);
/* Set the value of our real data file, after we've removed unwanted characters. */
$datafile = str_replace('/', '_', $datafile);
$result = "$real_hash_dir/$datafile";
/* Check for this file in the real hash directory. */
if ($hash_search && !@file_exists($result)) {
/* First check the base directory, the most common location. */
if (@file_exists("$dir/$datafile")) {
rename("$dir/$datafile", $result);
/* Then check the full range of possible hash directories. */
} else {
$check_hash_dir = $dir;
for ($h = 0; $h < 4; ++$h) {
$check_hash_dir .= '/' . $hash_dirs[$h];
if (@is_readable("$check_hash_dir/$datafile")) {
rename("$check_hash_dir/$datafile", $result);
break;
}
}
}
}
/* Return the full hashed datafile path. */
return ($result);
}
/**
* Helper function for getHashedFile(), given a username returns
* the hashed dir for that username.
*
* NOTE that the hashed dir will be created if it doesn't
* already exist.
*
* @param string username the username of the current user
* @param string dir the squirrelmail datadir
* @param string hash_dirs default ''
* @return the path to the hash dir for username
*/
function getHashedDir($username, $dir, $hash_dirs = '') {
global $dir_hash_level;
/* Remove trailing slash from $dir if found */
if (substr($dir, -1) == '/') {
$dir = substr($dir, 0, strlen($dir) - 1);
}
/* If necessary, populate the hash dir variable. */
if ($hash_dirs == '') {
$hash_dirs = computeHashDirs($username);
}
/* Make sure the full hash directory exists. */
$real_hash_dir = $dir;
for ($h = 0; $h < $dir_hash_level; ++$h) {
$real_hash_dir .= '/' . $hash_dirs[$h];
if (!@is_dir($real_hash_dir)) {
if (!@mkdir($real_hash_dir, 0770)) {
echo sprintf(_("Error creating directory %s."), $real_hash_dir) . '<br />' .
_("Could not create hashed directory structure!") . "<br />\n" .
_("Please contact your system administrator and report this error.") . "<br />\n";
exit;
}
}
}
/* And return that directory. */
return ($real_hash_dir);
}
/**
* Helper function for getHashDir which does the actual hash calculation.
*
* @param string username the username to calculate the hash dir for
* @return array a list of hash dirs for this username
*/
function computeHashDirs($username) {
/* Compute the hash for this user and extract the hash directories. */
/* Note that the crc32() function result will be different on 32 and */
/* 64 bit systems, thus the hack below. */
$crc = crc32($username);
if ($crc & 0x80000000) {
$crc ^= 0xffffffff;
$crc += 1;
}
$hash = base_convert($crc, 10, 16);
$hash_dirs = array();
for ($h = 0; $h < 4; ++ $h) {
$hash_dirs[] = substr($hash, $h, 1);
}
/* Return our array of hash directories. */
return ($hash_dirs);
}
|