Fixes for minor bugs pointed out by Tyler Akins.
[squirrelmail.git] / 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 // Make sure that this fgets is larger than any of the pref strings
53 // could ever be. 1024 is too short
54 $pref = trim(fgets($file, 65536));
55 $equalsAt = strpos($pref, '=');
56 if ($equalsAt > 0) {
57 $key = substr($pref, 0, $equalsAt);
58 $value = substr($pref, $equalsAt + 1);
59 /* this is to 'rescue' old-style highlighting rules. */
60 if (substr($key, 0, 9) == 'highlight') {
61 $key = 'highlight' . $highlight_num;
62 $highlight_num ++;
63 }
64
65 if ($value != '') {
66 $prefs_cache[$key] = $value;
67 }
68 }
69 }
70 fclose($file);
71
72 $prefs_are_cached = TRUE;
73
74 sqsession_register($prefs_cache, 'prefs_cache');
75 sqsession_register($prefs_are_cached, 'prefs_are_cached');
76 }
77
78 /**
79 * Return the value for the prefernce given by $string.
80 */
81 function getPref($data_dir, $username, $string, $default = '') {
82 global $prefs_cache;
83
84 $result = do_hook_function('get_pref_override',array($username,$string));
85 if (!$result) {
86 cachePrefValues($data_dir, $username);
87 if (isset($prefs_cache[$string])) {
88 $result = $prefs_cache[$string];
89 } else {
90 $result = do_hook_function('get_pref', array($username,$string));
91 if (!$result) {
92 $result = $default;
93 }
94 }
95 }
96 return ($result);
97 }
98
99 /**
100 * Save the preferences for this user.
101 */
102 function savePrefValues($data_dir, $username) {
103 global $prefs_cache;
104
105 $filename = getHashedFile($username, $data_dir, "$username.pref");
106
107 /* Open the file for writing, or else display an error to the user. */
108 if(!$file = @fopen($filename.'.tmp', 'w'))
109 {
110 include_once(SM_PATH . 'functions/display_messages.php');
111 logout_error( sprintf( _("Preference file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename.'.tmp') );
112 exit;
113 }
114 foreach ($prefs_cache as $Key => $Value) {
115 if (isset($Value)) {
116 $tmpwrite = @fwrite($file, $Key . '=' . $Value . "\n");
117 if ($tmpwrite == -1) {
118 logout_error( sprintf( _("Preference file, %s, could not be written. Contact your system administrator to resolve this issue.") , $filename . '.tmp') );
119 exit;
120 }
121 }
122 }
123 fclose($file);
124 @copy($filename . '.tmp',$filename);
125 @unlink($filename . '.tmp');
126 chmod($filename, 0600);
127 }
128
129 /**
130 * Remove a preference for the current user.
131 */
132 function removePref($data_dir, $username, $string) {
133 global $prefs_cache;
134
135 cachePrefValues($data_dir, $username);
136
137 if (isset($prefs_cache[$string])) {
138 unset($prefs_cache[$string]);
139 }
140
141 savePrefValues($data_dir, $username);
142 }
143
144 /**
145 * Set a there preference $string to $value.
146 */
147 function setPref($data_dir, $username, $string, $value) {
148 global $prefs_cache;
149
150 cachePrefValues($data_dir, $username);
151 if (isset($prefs_cache[$string]) && ($prefs_cache[$string] == $value)) {
152 return;
153 }
154
155 if ($value === '') {
156 removePref($data_dir, $username, $string);
157 return;
158 }
159
160 $prefs_cache[$string] = $value;
161 savePrefValues($data_dir, $username);
162 }
163
164 /**
165 * Check for a preferences file. If one can not be found, create it.
166 */
167 function checkForPrefs($data_dir, $username, $filename = '') {
168 /* First, make sure we have the filename. */
169 if ($filename == '') {
170 $filename = getHashedFile($username, $data_dir, "$username.pref");
171 }
172
173 /* Then, check if the file exists. */
174 if (!@file_exists($filename) ) {
175 /* First, check the $data_dir for the default preference file. */
176 $default_pref = $data_dir . 'default_pref';
177
178 /* If it is not there, check the internal data directory. */
179 if (!@file_exists($default_pref)) {
180 $default_pref = SM_PATH . 'data/default_pref';
181 }
182
183 /* Otherwise, report an error. */
184 $errTitle = sprintf( _("Error opening %s"), $default_pref );
185 if (!is_readable($default_pref)) {
186 $errString = $errTitle . "<br>\n" .
187 _("Default preference file not found or not readable!") . "<br>\n" .
188 _("Please contact your system administrator and report this error.") . "<br>\n";
189 include_once(SM_PATH . 'functions/display_messages.php' );
190 logout_error( $errString, $errTitle );
191 exit;
192 } else if (!@copy($default_pref, $filename)) {
193 $uid = 'httpd';
194 if (function_exists('posix_getuid')){
195 $user_data = posix_getpwuid(posix_getuid());
196 $uid = $user_data['name'];
197 }
198 $errString = $errTitle . '<br>' .
199 _("Could not create initial preference file!") . "<br>\n" .
200 sprintf( _("%s should be writable by user %s"), $data_dir, $uid ) .
201 "<br>\n" . _("Please contact your system administrator and report this error.") . "<br>\n";
202 include_once(SM_PATH . 'functions/display_messages.php' );
203 logout_error( $errString, $errTitle );
204 exit;
205 }
206 }
207 }
208
209 /**
210 * Write the User Signature.
211 */
212 function setSig($data_dir, $username, $number, $value) {
213 $filename = getHashedFile($username, $data_dir, "$username.si$number");
214 /* Open the file for writing, or else display an error to the user. */
215 if(!$file = @fopen("$filename.tmp", 'w')) {
216 include_once( '../functions/display_messages.php' );
217 logout_error( sprintf( _("Signature file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename . '.tmp') );
218 exit;
219 }
220 $tmpwrite = @fwrite($file, $value);
221 if ($tmpwrite == -1) {
222 include_once( '../functions/display_messages.php' );
223 logout_error( sprintf( _("Signature file, %s, could not be written. Contact your system administrator to resolve this issue.") , $filename . '.tmp'));
224 exit;
225 }
226 fclose($file);
227 @copy($filename . '.tmp',$filename);
228 @unlink($filename . '.tmp');
229 chmod($filename, 0600);
230
231 }
232
233 /**
234 * Get the signature.
235 */
236 function getSig($data_dir, $username, $number) {
237 $filename = getHashedFile($username, $data_dir, "$username.si$number");
238 $sig = '';
239 if (file_exists($filename)) {
240 /* Open the file, or else display an error to the user. */
241 if(!$file = @fopen($filename, 'r'))
242 {
243 include_once(SM_PATH . 'functions/display_messages.php');
244 logout_error( sprintf( _("Signature file, %s, could not be opened. Contact your system administrator to resolve this issue."), $filename) );
245 exit;
246 }
247 while (!feof($file)) {
248 $sig .= fgets($file, 1024);
249 }
250 fclose($file);
251 }
252 return $sig;
253 }