<?php
/**
* file_prefs.php
*
* This contains functions for manipulating user preferences in files
*
* @copyright 1999-2011 The SquirrelMail Project Team
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
* @version $Id: file_prefs.php 14084 2011-01-06 02:44:03Z pdontthink $
* @package squirrelmail
* @subpackage prefs
* @since 1.2.5
*/
/**
* Check the preferences into the session cache.
*/
function cachePrefValues($data_dir, $username) {
global $prefs_are_cached, $prefs_cache;
sqgetGlobalVar('prefs_are_cached', $prefs_are_cached, SQ_SESSION );
if ( isset($prefs_are_cached) && $prefs_are_cached) {
sqgetGlobalVar('prefs_cache', $prefs_cache, SQ_SESSION );
return;
}
sqsession_unregister('prefs_cache');
sqsession_unregister('prefs_are_cached');
/* Calculate the filename for the user's preference file */
$filename = getHashedFile($username, $data_dir, "$username.pref");
/* A call to checkForPrefs here should take eliminate the need for */
/* this to be called throughout the rest of the SquirrelMail code. */
checkForPrefs($data_dir, $username, $filename);
/* Make sure that the preference file now DOES exist. */
if (!file_exists($filename)) {
logout_error( sprintf( _("Preference file, %s, does not exist. Log out, and log back in to create a default preference file."), $filename) );
exit;
}
/* Open the file, or else display an error to the user. */
if(!$file = @fopen($filename, 'r'))
{
logout_error( sprintf( _("Preference file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename) );
exit;
}
/* Read in the preferences. */
$highlight_num = 0;
while (! feof($file)) {
$pref = '';
/* keep reading a pref until we reach an eol (\n (or \r for macs)) */
while($read = fgets($file, 1024))
{
$pref .= $read;
if(strpos($read,"\n") || strpos($read,"\r"))
break;
}
$pref = trim($pref);
$equalsAt = strpos($pref, '=');
if ($equalsAt > 0) {
$key = substr($pref, 0, $equalsAt);
$value = substr($pref, $equalsAt + 1);
/* this is to 'rescue' old-style highlighting rules. */
if (substr($key, 0, 9) == 'highlight') {
$key = 'highlight' . $highlight_num;
$highlight_num ++;
}
if ($value != '') {
$prefs_cache[$key] = $value;
}
}
}
fclose($file);
$prefs_are_cached = TRUE;
sqsession_register($prefs_cache, 'prefs_cache');
sqsession_register($prefs_are_cached, 'prefs_are_cached');
}
/**
* Return the value for the preference given by $string.
*/
function getPref($data_dir, $username, $string, $default = '') {
global $prefs_cache;
$result = do_hook_function('get_pref_override',array($username, $string));
//FIXME: testing below for !$result means that a plugin cannot fetch its own pref value of 0, '0', '', FALSE, or anything else that evaluates to boolean FALSE.
if (!$result) {
cachePrefValues($data_dir, $username);
if (isset($prefs_cache[$string])) {
$result = $prefs_cache[$string];
} else {
//FIXME: is there justification for having these TWO hooks so close together? who uses these?
$result = do_hook_function('get_pref', array($username, $string));
//FIXME: testing below for !$result means that a plugin cannot fetch its own pref value of 0, '0', '', FALSE, or anything else that evaluates to boolean FALSE.
if (!$result) {
$result = $default;
}
}
}
return ($result);
}
/**
* Save the preferences for this user.
*/
function savePrefValues($data_dir, $username) {
global $prefs_cache;
$filename = getHashedFile($username, $data_dir, "$username.pref");
/* Open the file for writing, or else display an error to the user. */
if(!$file = @fopen($filename.'.tmp', 'w'))
{
logout_error( sprintf( _("Preference file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename.'.tmp') );
exit;
}
foreach ($prefs_cache as $Key => $Value) {
if (isset($Value)) {
if ( sq_fwrite($file, $Key . '=' . $Value . "\n") === FALSE ) {
logout_error( sprintf( _("Preference file, %s, could not be written. Contact your system administrator to resolve this issue.") , $filename . '.tmp') );
exit;
}
}
}
fclose($file);
if (! @copy($filename . '.tmp',$filename) ) {
logout_error( sprintf( _("Preference file, %s, could not be copied from temporary file, %s. Contact your system administrator to resolve this issue."), $filename, $filename . '.tmp') );
exit;
}
@unlink($filename . '.tmp');
@chmod($filename, 0600);
sqsession_register($prefs_cache , 'prefs_cache');
}
/**
* Remove a preference for the current user.
*/
function removePref($data_dir, $username, $string) {
global $prefs_cache;
cachePrefValues($data_dir, $username);
if (isset($prefs_cache[$string])) {
unset($prefs_cache[$string]);
}
savePrefValues($data_dir, $username);
}
/**
* Set a there preference $string to $value.
*/
function setPref($data_dir, $username, $string, $value) {
global $prefs_cache;
cachePrefValues($data_dir, $username);
if (isset($prefs_cache[$string]) && ($prefs_cache[$string] == $value)) {
return;
}
if ($value === '') {
removePref($data_dir, $username, $string);
return;
}
$prefs_cache[$string] = $value;
savePrefValues($data_dir, $username);
}
/**
* Check for a preferences file. If one can not be found, create it.
*/
function checkForPrefs($data_dir, $username, $filename = '') {
/* First, make sure we have the filename. */
if ($filename == '') {
$filename = getHashedFile($username, $data_dir, "$username.pref");
}
/* Then, check if the file exists. */
if (!@file_exists($filename) ) {
/* First, check the $data_dir for the default preference file. */
if(substr($data_dir,-1) != '/') {
$data_dir .= '/';
}
$default_pref = $data_dir . 'default_pref';
/* If it is not there, check the internal data directory. */
if (!@file_exists($default_pref)) {
$default_pref = SM_PATH . 'data/default_pref';
}
/* Otherwise, report an error. */
$errTitle = sprintf( _("Error opening %s"), $default_pref );
if (!is_readable($default_pref)) {
$errString = $errTitle . "<br />\n" .
_("Default preference file not found or not readable!") . "<br />\n" .
_("Please contact your system administrator and report this error.") . "<br />\n";
logout_error( $errString, $errTitle );
exit;
} else if (!@copy($default_pref, $filename)) {
$uid = 'httpd';
if (function_exists('posix_getuid')){
$user_data = posix_getpwuid(posix_getuid());
$uid = $user_data['name'];
}
$errString = $errTitle . '<br />' .
_("Could not create initial preference file!") . "<br />\n" .
sprintf( _("%s should be writable by user %s"), $data_dir, $uid ) .
"<br />\n" . _("Please contact your system administrator and report this error.") . "<br />\n";
logout_error( $errString, $errTitle );
exit;
}
}
}
/**
* Write the User Signature.
*/
function setSig($data_dir, $username, $number, $value) {
// Limit signature size to 64KB (database BLOB limit)
if (strlen($value)>65536) {
error_option_save(_("Signature is too big."));
return;
}
$filename = getHashedFile($username, $data_dir, "$username.si$number");
/* Open the file for writing, or else display an error to the user. */
if(!$file = @fopen("$filename.tmp", 'w')) {
logout_error( sprintf( _("Signature file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename . '.tmp') );
exit;
}
if ( sq_fwrite($file, $value) === FALSE ) {
logout_error( sprintf( _("Signature file, %s, could not be written. Contact your system administrator to resolve this issue.") , $filename . '.tmp'));
exit;
}
fclose($file);
if (! @copy($filename . '.tmp',$filename) ) {
logout_error( sprintf( _("Signature file, %s, could not be copied from temporary file, %s. Contact your system administrator to resolve this issue."), $filename, $filename . '.tmp') );
exit;
}
@unlink($filename . '.tmp');
@chmod($filename, 0600);
}
/**
* Get the signature.
*/
function getSig($data_dir, $username, $number) {
$filename = getHashedFile($username, $data_dir, "$username.si$number");
$sig = '';
if (file_exists($filename)) {
/* Open the file, or else display an error to the user. */
if(!$file = @fopen($filename, 'r'))
{
logout_error( sprintf( _("Signature file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename) );
exit;
}
while (!feof($file)) {
$sig .= fgets($file, 1024);
}
fclose($file);
}
return $sig;
}
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