functions/file_prefs.php

   1 <?php
   2
   3 /**
   4  * file_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 in files
  10  *
  11  * $Id$
  12  */
  13
  14 /**
  15  * Check the preferences into the session cache.
  16  */
  17 function cachePrefValues($data_dir, $username) {
  18     global $prefs_are_cached, $prefs_cache;
  19
  20     if ( isset($prefs_are_cached) && $prefs_are_cached) {
  21         return;
  22     }
  23
  24     sqsession_unregister('prefs_cache');
  25     sqsession_unregister('prefs_are_cached');
  26
  27     /* Calculate the filename for the user's preference file */
  28     $filename = getHashedFile($username, $data_dir, "$username.pref");
  29
  30     /* A call to checkForPrefs here should take eliminate the need for */
  31     /* this to be called throughout the rest of the SquirrelMail code. */
  32     checkForPrefs($data_dir, $username, $filename);
  33
  34     /* Make sure that the preference file now DOES exist. */
  35     if (!file_exists($filename)) {
  36         include_once(SM_PATH . 'functions/display_messages.php');
  37         logout_error( sprintf( _("Preference file, %s, does not exist. Log out, and log back in to create a default preference file."), $filename)  );
  38         exit;
  39     }
  40
  41     /* Open the file, or else display an error to the user. */
  42     if(!$file = @fopen($filename, 'r'))
  43     {
  44         include_once(SM_PATH . 'functions/display_messages.php');
  45         logout_error( sprintf( _("Preference file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename) );
  46         exit;
  47     }
  48
  49     /* Read in the preferences. */
  50     $highlight_num = 0;
  51     while (! feof($file)) {
  52         $pref = trim(fgets($file, 1024));
  53         $equalsAt = strpos($pref, '=');
  54         if ($equalsAt > 0) {
  55             $key = substr($pref, 0, $equalsAt);
  56             $value = substr($pref, $equalsAt + 1);
  57             /* this is to 'rescue' old-style highlighting rules. */
  58             if (substr($key, 0, 9) == 'highlight') {
  59                 $key = 'highlight' . $highlight_num;
  60                 $highlight_num ++;
  61             }
  62
  63             if ($value != '') {
  64                 $prefs_cache[$key] = $value;
  65             }
  66         }
  67      }
  68      fclose($file);
  69
  70     $prefs_are_cached = TRUE;
  71
  72     sqsession_register($prefs_cache, 'prefs_cache');
  73     sqsession_register($prefs_are_cached, 'prefs_are_cached');
  74 }
  75
  76 /**
  77  * Return the value for the prefernce given by $string.
  78  */
  79 function getPref($data_dir, $username, $string, $default = '') {
  80     global $prefs_cache;
  81
  82     $result = do_hook_function('get_pref_override',array($username,$string));
  83     if (!$result) {
  84         cachePrefValues($data_dir, $username);
  85         if (isset($prefs_cache[$string])) {
  86             $result = $prefs_cache[$string];
  87         } else {
  88             $result = do_hook_function('get_pref', array($username,$string));
  89             if (!$result) {
  90                 $result = $default;
  91             }
  92         }
  93     }
  94     return ($result);
  95 }
  96
  97 /**
  98  * Save the preferences for this user.
  99  */
 100 function savePrefValues($data_dir, $username) {
 101     global $prefs_cache;
 102
 103     $filename = getHashedFile($username, $data_dir, "$username.pref");
 104
 105     /* Open the file for writing, or else display an error to the user. */
 106     if(!$file = @fopen($filename.'.tmp', 'w'))
 107     {
 108         include_once(SM_PATH . 'functions/display_messages.php');
 109         logout_error( sprintf( _("Preference file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename.'.tmp') );
 110         exit;
 111     }
 112     foreach ($prefs_cache as $Key => $Value) {
 113         if (isset($Value)) {
 114             $tmpwrite = @fwrite($file, $Key . '=' . $Value . "\n");
 115             if ($tmpwrite == -1) {
 116                logout_error( sprintf( _("Preference file, %s, could not be written. Contact your system administrator to resolve this issue.") , $filename . '.tmp') );
 117                exit;
 118             }
 119         }
 120     }
 121     fclose($file);
 122     @copy($filename . '.tmp',$filename);
 123     @unlink($filename . '.tmp');
 124     chmod($filename, 0600);
 125 }
 126
 127 /**
 128  * Remove a preference for the current user.
 129  */
 130 function removePref($data_dir, $username, $string) {
 131     global $prefs_cache;
 132
 133     cachePrefValues($data_dir, $username);
 134
 135     if (isset($prefs_cache[$string])) {
 136         unset($prefs_cache[$string]);
 137     }
 138
 139     savePrefValues($data_dir, $username);
 140 }
 141
 142 /**
 143  * Set a there preference $string to $value.
 144  */
 145 function setPref($data_dir, $username, $string, $value) {
 146     global $prefs_cache;
 147
 148     cachePrefValues($data_dir, $username);
 149     if (isset($prefs_cache[$string]) && ($prefs_cache[$string] == $value)) {
 150         return;
 151     }
 152
 153     if ($value === '') {
 154         removePref($data_dir, $username, $string);
 155         return;
 156     }
 157
 158     $prefs_cache[$string] = $value;
 159     savePrefValues($data_dir, $username);
 160 }
 161
 162 /**
 163  * Check for a preferences file. If one can not be found, create it.
 164  */
 165 function checkForPrefs($data_dir, $username, $filename = '') {
 166     /* First, make sure we have the filename. */
 167     if ($filename == '') {
 168         $filename = getHashedFile($username, $data_dir, "$username.pref");
 169     }
 170
 171     /* Then, check if the file exists. */
 172     if (!@file_exists($filename) ) {
 173         /* First, check the $data_dir for the default preference file. */
 174         $default_pref = $data_dir . 'default_pref';
 175
 176         /* If it is not there, check the internal data directory. */
 177         if (!@file_exists($default_pref)) {
 178             $default_pref = SM_PATH . 'data/default_pref';
 179         }
 180
 181         /* Otherwise, report an error. */
 182         $errTitle = sprintf( _("Error opening %s"), $default_pref );
 183         if (!is_readable($default_pref)) {
 184             $errString = $errTitle . "<br>\n" .
 185                          _("Default preference file not found or not readable!") . "<br>\n" .
 186                          _("Please contact your system administrator and report this error.") . "<br>\n";
 187             include_once(SM_PATH . 'functions/display_messages.php' );
 188             logout_error( $errString, $errTitle );
 189             exit;
 190         } else if (!@copy($default_pref, $filename)) {
 191             $uid = 'httpd';
 192             if (function_exists('posix_getuid')){
 193                 $user_data = posix_getpwuid(posix_getuid());
 194                 $uid = $user_data['name'];
 195             }
 196             $errString = $errTitle . '<br>' .
 197                        _("Could not create initial preference file!") . "<br>\n" .
 198                        sprintf( _("%s should be writable by user %s"), $data_dir, $uid ) .
 199                        "<br>\n" . _("Please contact your system administrator and report this error.") . "<br>\n";
 200             include_once(SM_PATH . 'functions/display_messages.php' );
 201             logout_error( $errString, $errTitle );
 202             exit;
 203         }
 204     }
 205 }
 206
 207 /**
 208  * Write the User Signature.
 209  */
 210 function setSig($data_dir, $username, $number, $value) {
 211     $filename = getHashedFile($username, $data_dir, "$username.si$number");
 212     /* Open the file for writing, or else display an error to the user. */
 213     if(!$file = @fopen("$filename.tmp", 'w')) {
 214         include_once( '../functions/display_messages.php' );
 215         logout_error( sprintf( _("Signature file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename . '.tmp') );
 216         exit;
 217     }
 218     $tmpwrite = @fwrite($file, $value);
 219     if ($tmpwrite == -1) {
 220        include_once( '../functions/display_messages.php' );
 221        logout_error( sprintf( _("Signature file, %s, could not be written. Contact your system administrator to resolve this issue.") , $filename . '.tmp'));
 222        exit;
 223     }
 224     fclose($file);
 225     @copy($filename . '.tmp',$filename);
 226     @unlink($filename . '.tmp');
 227     chmod($filename, 0600);
 228
 229 }
 230
 231 /**
 232  * Get the signature.
 233  */
 234 function getSig($data_dir, $username, $number) {
 235     $filename = getHashedFile($username, $data_dir, "$username.si$number");
 236     $sig = '';
 237     if (file_exists($filename)) {
 238         /* Open the file, or else display an error to the user. */
 239         if(!$file = @fopen($filename, 'r'))
 240         {
 241             include_once(SM_PATH . 'functions/display_messages.php');
 242             logout_error( sprintf( _("Signature file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename) );
 243             exit;
 244         }
 245         while (!feof($file)) {
 246             $sig .= fgets($file, 1024);
 247         }
 248         fclose($file);
 249     }
 250     return $sig;
 251 }