xref: /dokuwiki/inc/infoutils.php (revision 3008b6671845c9d4fabc53062b9140b5bf965b96) 
1<?php
2/**
3 * Information and debugging functions
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8if(!defined('DOKU_INC')) die('meh.');
9if(!defined('DOKU_MESSAGEURL')) define('DOKU_MESSAGEURL','http://update.dokuwiki.org/check/');
10
11/**
12 * Check for new messages from upstream
13 *
14 * @author Andreas Gohr <andi@splitbrain.org>
15 */
16function checkUpdateMessages(){
17    global $conf;
18    global $INFO;
19    global $updateVersion;
20    if(!$conf['updatecheck']) return;
21    if($conf['useacl'] && !$INFO['ismanager']) return;
22
23    $cf = $conf['cachedir'].'/messages.txt';
24    $lm = @filemtime($cf);
25
26    // check if new messages needs to be fetched
27    if($lm < time()-(60*60*24) || $lm < @filemtime(DOKU_INC.DOKU_SCRIPT)){
28        dbglog("checkUpdatesMessages(): downloading messages.txt");
29        $http = new DokuHTTPClient();
30        $http->timeout = 8;
31        $data = $http->get(DOKU_MESSAGEURL.$updateVersion);
32        io_saveFile($cf,$data);
33        @touch($cf);
34    }else{
35        dbglog("checkUpdatesMessages(): messages.txt up to date");
36        $data = io_readFile($cf);
37    }
38
39    // show messages through the usual message mechanism
40    $msgs = explode("\n%\n",$data);
41    foreach($msgs as $msg){
42        if($msg) msg($msg,2);
43    }
44}
45
46
47/**
48 * Return DokuWiki's version (split up in date and type)
49 *
50 * @author Andreas Gohr <andi@splitbrain.org>
51 */
52function getVersionData(){
53    $version = array();
54    //import version string
55    if(@file_exists(DOKU_INC.'VERSION')){
56        //official release
57        $version['date'] = trim(io_readfile(DOKU_INC.'VERSION'));
58        $version['type'] = 'Release';
59    }elseif(is_dir(DOKU_INC.'.git')){
60        $version['type'] = 'Git';
61        $version['date'] = 'unknown';
62
63        $inventory = DOKU_INC.'.git/logs/HEAD';
64        if(is_file($inventory)){
65            $sz   = filesize($inventory);
66            $seek = max(0,$sz-2000); // read from back of the file
67            $fh   = fopen($inventory,'rb');
68            fseek($fh,$seek);
69            $chunk = fread($fh,2000);
70            fclose($fh);
71            $chunk = trim($chunk);
72            $chunk = @array_pop(explode("\n",$chunk));   //last log line
73            $chunk = @array_shift(explode("\t",$chunk)); //strip commit msg
74            $chunk = explode(" ",$chunk);
75            array_pop($chunk); //strip timezone
76            $date = date('Y-m-d',array_pop($chunk));
77            if($date) $version['date'] = $date;
78        }
79    }else{
80        $version['date'] = 'unknown';
81        $version['type'] = 'snapshot?';
82    }
83    return $version;
84}
85
86/**
87 * Return DokuWiki's version (as a string)
88 *
89 * @author Anika Henke <anika@selfthinker.org>
90 */
91function getVersion(){
92    $version = getVersionData();
93    return $version['type'].' '.$version['date'];
94}
95
96/**
97 * Run a few sanity checks
98 *
99 * @author Andreas Gohr <andi@splitbrain.org>
100 */
101function check(){
102    global $conf;
103    global $INFO;
104
105    if ($INFO['isadmin'] || $INFO['ismanager']){
106        msg('DokuWiki version: '.getVersion(),1);
107    }
108
109    if(version_compare(phpversion(),'5.1.2','<')){
110        msg('Your PHP version is too old ('.phpversion().' vs. 5.1.2+ needed)',-1);
111    }else{
112        msg('PHP version '.phpversion(),1);
113    }
114
115    $mem = (int) php_to_byte(ini_get('memory_limit'));
116    if($mem){
117        if($mem < 16777216){
118            msg('PHP is limited to less than 16MB RAM ('.$mem.' bytes). Increase memory_limit in php.ini',-1);
119        }elseif($mem < 20971520){
120            msg('PHP is limited to less than 20MB RAM ('.$mem.' bytes), you might encounter problems with bigger pages. Increase memory_limit in php.ini',-1);
121        }elseif($mem < 33554432){
122            msg('PHP is limited to less than 32MB RAM ('.$mem.' bytes), but that should be enough in most cases. If not, increase memory_limit in php.ini',0);
123        }else{
124            msg('More than 32MB RAM ('.$mem.' bytes) available.',1);
125        }
126    }
127
128    if(is_writable($conf['changelog'])){
129        msg('Changelog is writable',1);
130    }else{
131        if (@file_exists($conf['changelog'])) {
132            msg('Changelog is not writable',-1);
133        }
134    }
135
136    if (isset($conf['changelog_old']) && @file_exists($conf['changelog_old'])) {
137        msg('Old changelog exists', 0);
138    }
139
140    if (@file_exists($conf['changelog'].'_failed')) {
141        msg('Importing old changelog failed', -1);
142    } else if (@file_exists($conf['changelog'].'_importing')) {
143        msg('Importing old changelog now.', 0);
144    } else if (@file_exists($conf['changelog'].'_import_ok')) {
145        msg('Old changelog imported', 1);
146        if (!plugin_isdisabled('importoldchangelog')) {
147            msg('Importoldchangelog plugin not disabled after import', -1);
148        }
149    }
150
151    if(is_writable(DOKU_CONF)){
152        msg('conf directory is writable',1);
153    }else{
154        msg('conf directory is not writable',-1);
155    }
156
157    if($conf['authtype'] == 'plain'){
158        global $config_cascade;
159        if(is_writable($config_cascade['plainauth.users']['default'])){
160            msg('conf/users.auth.php is writable',1);
161        }else{
162            msg('conf/users.auth.php is not writable',0);
163        }
164    }
165
166    if(function_exists('mb_strpos')){
167        if(defined('UTF8_NOMBSTRING')){
168            msg('mb_string extension is available but will not be used',0);
169        }else{
170            msg('mb_string extension is available and will be used',1);
171            if(ini_get('mbstring.func_overload') != 0){
172                msg('mb_string function overloading is enabled, this will cause problems and should be disabled',-1);
173            }
174        }
175    }else{
176        msg('mb_string extension not available - PHP only replacements will be used',0);
177    }
178
179    if($conf['allowdebug']){
180        msg('Debugging support is enabled. If you don\'t need it you should set $conf[\'allowdebug\'] = 0',-1);
181    }else{
182        msg('Debugging support is disabled',1);
183    }
184
185    if($INFO['userinfo']['name']){
186        msg('You are currently logged in as '.$_SERVER['REMOTE_USER'].' ('.$INFO['userinfo']['name'].')',0);
187        msg('You are part of the groups '.join($INFO['userinfo']['grps'],', '),0);
188    }else{
189        msg('You are currently not logged in',0);
190    }
191
192    msg('Your current permission for this page is '.$INFO['perm'],0);
193
194    if(is_writable($INFO['filepath'])){
195        msg('The current page is writable by the webserver',0);
196    }else{
197        msg('The current page is not writable by the webserver',0);
198    }
199
200    if($INFO['writable']){
201        msg('The current page is writable by you',0);
202    }else{
203        msg('The current page is not writable by you',0);
204    }
205
206    $check = wl('','',true).'data/_dummy';
207    $http = new DokuHTTPClient();
208    $http->timeout = 6;
209    $res = $http->get($check);
210    if(strpos($res,'data directory') !== false){
211        msg('It seems like the data directory is accessible from the web.
212                Make sure this directory is properly protected
213                (See <a href="http://www.dokuwiki.org/security">security</a>)',-1);
214    }elseif($http->status == 404 || $http->status == 403){
215        msg('The data directory seems to be properly protected',1);
216    }else{
217        msg('Failed to check if the data directory is accessible from the web.
218                Make sure this directory is properly protected
219                (See <a href="http://www.dokuwiki.org/security">security</a>)',-1);
220    }
221
222    // Check for corrupted search index
223    $lengths = idx_listIndexLengths();
224    $index_corrupted = false;
225    foreach ($lengths as $length) {
226        if (count(idx_getIndex('w', $length)) != count(idx_getIndex('i', $length))) {
227            $index_corrupted = true;
228            break;
229        }
230    }
231
232    foreach (idx_getIndex('metadata', '') as $index) {
233        if (count(idx_getIndex($index.'_w', '')) != count(idx_getIndex($index.'_i', ''))) {
234            $index_corrupted = true;
235            break;
236        }
237    }
238
239    if ($index_corrupted)
240        msg('The search index is corrupted. It might produce wrong results and most
241                probably needs to be rebuilt. See
242                <a href="http://www.dokuwiki.org/faq:searchindex">faq:searchindex</a>
243                for ways to rebuild the search index.', -1);
244    elseif (!empty($lengths))
245        msg('The search index seems to be working', 1);
246    else
247        msg('The search index is empty. See
248                <a href="http://www.dokuwiki.org/faq:searchindex">faq:searchindex</a>
249                for help on how to fix the search index. If the default indexer
250                isn\'t used or the wiki is actually empty this is normal.');
251}
252
253/**
254 * print a message
255 *
256 * If HTTP headers were not sent yet the message is added
257 * to the global message array else it's printed directly
258 * using html_msgarea()
259 *
260 *
261 * Levels can be:
262 *
263 * -1 error
264 *  0 info
265 *  1 success
266 *
267 * @author Andreas Gohr <andi@splitbrain.org>
268 * @see    html_msgarea
269 */
270function msg($message,$lvl=0,$line='',$file=''){
271    global $MSG, $MSG_shown;
272    $errors[-1] = 'error';
273    $errors[0]  = 'info';
274    $errors[1]  = 'success';
275    $errors[2]  = 'notify';
276
277    if($line || $file) $message.=' ['.basename($file).':'.$line.']';
278
279    if(!isset($MSG)) $MSG = array();
280    $MSG[]=array('lvl' => $errors[$lvl], 'msg' => $message);
281    if(isset($MSG_shown) || headers_sent()){
282        if(function_exists('html_msgarea')){
283            html_msgarea();
284        }else{
285            print "ERROR($lvl) $message";
286        }
287        unset($GLOBALS['MSG']);
288    }
289}
290
291/**
292 * print debug messages
293 *
294 * little function to print the content of a var
295 *
296 * @author Andreas Gohr <andi@splitbrain.org>
297 */
298function dbg($msg,$hidden=false){
299    if($hidden){
300        echo "<!--\n";
301        print_r($msg);
302        echo "\n-->";
303    }else{
304        echo '<pre class="dbg">';
305        echo hsc(print_r($msg,true));
306        echo '</pre>';
307    }
308}
309
310/**
311 * Print info to a log file
312 *
313 * @author Andreas Gohr <andi@splitbrain.org>
314 */
315function dbglog($msg,$header=''){
316    global $conf;
317    // The debug log isn't automatically cleaned thus only write it when
318    // debugging has been enabled by the user.
319    if($conf['allowdebug'] !== 1) return;
320    if(is_object($msg) || is_array($msg)){
321        $msg = print_r($msg,true);
322    }
323
324    if($header) $msg = "$header\n$msg";
325
326    $file = $conf['cachedir'].'/debug.log';
327    $fh = fopen($file,'a');
328    if($fh){
329        fwrite($fh,date('H:i:s ').$_SERVER['REMOTE_ADDR'].': '.$msg."\n");
330        fclose($fh);
331    }
332}
333
334/**
335 * Print a reversed, prettyprinted backtrace
336 *
337 * @author Gary Owen <gary_owen@bigfoot.com>
338 */
339function dbg_backtrace(){
340    // Get backtrace
341    $backtrace = debug_backtrace();
342
343    // Unset call to debug_print_backtrace
344    array_shift($backtrace);
345
346    // Iterate backtrace
347    $calls = array();
348    $depth = count($backtrace) - 1;
349    foreach ($backtrace as $i => $call) {
350        $location = $call['file'] . ':' . $call['line'];
351        $function = (isset($call['class'])) ?
352            $call['class'] . $call['type'] . $call['function'] : $call['function'];
353
354        $params = array();
355        if (isset($call['args'])){
356            foreach($call['args'] as $arg){
357                if(is_object($arg)){
358                    $params[] = '[Object '.get_class($arg).']';
359                }elseif(is_array($arg)){
360                    $params[] = '[Array]';
361                }elseif(is_null($arg)){
362                    $param[] = '[NULL]';
363                }else{
364                    $params[] = (string) '"'.$arg.'"';
365                }
366            }
367        }
368        $params = implode(', ',$params);
369
370        $calls[$depth - $i] = sprintf('%s(%s) called at %s',
371                $function,
372                str_replace("\n", '\n', $params),
373                $location);
374    }
375    ksort($calls);
376
377    return implode("\n", $calls);
378}
379
380/**
381 * Remove all data from an array where the key seems to point to sensitive data
382 *
383 * This is used to remove passwords, mail addresses and similar data from the
384 * debug output
385 *
386 * @author Andreas Gohr <andi@splitbrain.org>
387 */
388function debug_guard(&$data){
389    foreach($data as $key => $value){
390        if(preg_match('/(notify|pass|auth|secret|ftp|userinfo|token|buid|mail|proxy)/i',$key)){
391            $data[$key] = '***';
392            continue;
393        }
394        if(is_array($value)) debug_guard($data[$key]);
395    }
396}
397