xref: /dokuwiki/inc/infoutils.php (revision 6a83a919a20409b5f632c75e669b186efc93af6f) 
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/');
10require_once(DOKU_INC.'inc/HTTPClient.php');
11
12/**
13 * Check for new messages from upstream
14 *
15 * @author Andreas Gohr <andi@splitbrain.org>
16 */
17function checkUpdateMessages(){
18    global $conf;
19    global $INFO;
20    if(!$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_CONF.'msg')){
28        $num = @file(DOKU_CONF.'msg');
29        $num = is_array($num) ? (int) $num[0] : 0;
30        $http = new DokuHTTPClient();
31        $http->timeout = 8;
32        $data = $http->get(DOKU_MESSAGEURL.$num);
33        io_saveFile($cf,$data);
34    }else{
35        $data = io_readFile($cf);
36    }
37
38    // show messages through the usual message mechanism
39    $msgs = explode("\n%\n",$data);
40    foreach($msgs as $msg){
41        if($msg) msg($msg,2);
42    }
43}
44
45
46/**
47 * Return DokuWikis version
48 *
49 * @author Andreas Gohr <andi@splitbrain.org>
50 */
51function getVersion(){
52  //import version string
53  if(@file_exists(DOKU_INC.'VERSION')){
54    //official release
55    return 'Release '.trim(io_readfile(DOKU_INC.'VERSION'));
56  }elseif(is_dir(DOKU_INC.'_darcs')){
57    //darcs checkout - read last 2000 bytes of inventory
58    $sz   = filesize(DOKU_INC.'_darcs/inventory');
59    $seek = max(0,$sz-2000);
60    $fh   = fopen(DOKU_INC.'_darcs/inventory','rb');
61    fseek($fh,$seek);
62    $chunk = fread($fh,2000);
63    fclose($fh);
64    $inv = preg_grep('#\*\*\d{14}[\]$]#',explode("\n",$chunk));
65    $cur = array_pop($inv);
66    preg_match('#\*\*(\d{4})(\d{2})(\d{2})#',$cur,$matches);
67    return 'Darcs '.$matches[1].'-'.$matches[2].'-'.$matches[3];
68  }else{
69    return 'snapshot?';
70  }
71}
72
73/**
74 * Run a few sanity checks
75 *
76 * @author Andreas Gohr <andi@splitbrain.org>
77 */
78function check(){
79  global $conf;
80  global $INFO;
81
82  msg('DokuWiki version: '.getVersion(),1);
83
84  if(version_compare(phpversion(),'4.3.3','<')){
85    msg('Your PHP version is too old ('.phpversion().' vs. 4.3.3+ recommended)',-1);
86  }elseif(version_compare(phpversion(),'4.3.10','<')){
87    msg('Consider upgrading PHP to 4.3.10 or higher for security reasons (your version: '.phpversion().')',0);
88  }else{
89    msg('PHP version '.phpversion(),1);
90  }
91
92  $mem = (int) php_to_byte(ini_get('memory_limit'));
93  if($mem){
94    if($mem < 16777216){
95        msg('PHP is limited to less than 16MB RAM ('.$mem.' bytes). Increase memory_limit in php.ini',-1);
96    }elseif($mem < 20971520){
97        msg('PHP is limited to less than 20MB RAM ('.$mem.' bytes), you might encounter problems with bigger pages. Increase memory_limit in php.ini',-1);
98    }elseif($mem < 33554432){
99        msg('PHP is limited to less than 32MB RAM ('.$mem.' bytes), but that should be enough in most cases. If not, increase memory_limit in php.ini',0);
100    }else{
101        msg('More than 32MB RAM ('.$mem.' bytes) available.',1);
102    }
103  }
104
105
106  if(is_writable($conf['changelog'])){
107    msg('Changelog is writable',1);
108  }else{
109    if (@file_exists($conf['changelog'])) {
110      msg('Changelog is not writable',-1);
111    }
112  }
113
114  if (isset($conf['changelog_old']) && @file_exists($conf['changelog_old'])) {
115    msg('Old changelog exists', 0);
116  }
117
118  if (@file_exists($conf['changelog'].'_failed')) {
119    msg('Importing old changelog failed', -1);
120  } else if (@file_exists($conf['changelog'].'_importing')) {
121    msg('Importing old changelog now.', 0);
122  } else if (@file_exists($conf['changelog'].'_import_ok')) {
123    msg('Old changelog imported', 1);
124    if (!plugin_isdisabled('importoldchangelog')) {
125      msg('Importoldchangelog plugin not disabled after import', -1);
126    }
127  }
128
129  if(is_writable($conf['datadir'])){
130    msg('Datadir is writable',1);
131  }else{
132    msg('Datadir is not writable',-1);
133  }
134
135  if(is_writable($conf['olddir'])){
136    msg('Attic is writable',1);
137  }else{
138    msg('Attic is not writable',-1);
139  }
140
141  if(is_writable($conf['mediadir'])){
142    msg('Mediadir is writable',1);
143  }else{
144    msg('Mediadir is not writable',-1);
145  }
146
147  if(is_writable($conf['cachedir'])){
148    msg('Cachedir is writable',1);
149  }else{
150    msg('Cachedir is not writable',-1);
151  }
152
153  if(is_writable($conf['lockdir'])){
154    msg('Lockdir is writable',1);
155  }else{
156    msg('Lockdir is not writable',-1);
157  }
158
159  if($conf['authtype'] == 'plain'){
160    if(is_writable(DOKU_CONF.'users.auth.php')){
161      msg('conf/users.auth.php is writable',1);
162    }else{
163      msg('conf/users.auth.php is not writable',0);
164    }
165  }
166
167  if(function_exists('mb_strpos')){
168    if(defined('UTF8_NOMBSTRING')){
169      msg('mb_string extension is available but will not be used',0);
170    }else{
171      msg('mb_string extension is available and will be used',1);
172    }
173  }else{
174    msg('mb_string extension not available - PHP only replacements will be used',0);
175  }
176
177  if($conf['allowdebug']){
178    msg('Debugging support is enabled. If you don\'t need it you should set $conf[\'allowdebug\'] = 0',-1);
179  }else{
180    msg('Debugging support is disabled',1);
181  }
182
183  if($INFO['userinfo']['name']){
184    msg('You are currently logged in as '.$_SERVER['REMOTE_USER'].' ('.$INFO['userinfo']['name'].')',0);
185    msg('You are part of the groups '.join($INFO['userinfo']['grps'],', '),0);
186  }else{
187    msg('You are currently not logged in',0);
188  }
189
190  msg('Your current permission for this page is '.$INFO['perm'],0);
191
192  if(is_writable($INFO['filepath'])){
193    msg('The current page is writable by the webserver',0);
194  }else{
195    msg('The current page is not writable by the webserver',0);
196  }
197
198  if($INFO['writable']){
199    msg('The current page is writable by you',0);
200  }else{
201    msg('The current page is not writable by you',0);
202  }
203
204  require_once(DOKU_INC.'inc/HTTPClient.php');
205  $check = wl('','',true).'data/_dummy';
206  $http = new DokuHTTPClient();
207  $http->timeout = 6;
208  $res = $http->get($check);
209  if(strpos($res,'data directory') !== false){
210    msg('It seems like the data directory is accessible from the web.
211         Make sure this directory is properly protected
212         (See <a href="http://www.dokuwiki.org/security">security</a>)',-1);
213  }elseif($http->status == 404 || $http->status == 403){
214    msg('The data directory seems to be properly protected',1);
215  }else{
216    msg('Failed to check if the data directory is accessible from the web.
217         Make sure this directory is properly protected
218         (See <a href="http://www.dokuwiki.org/security">security</a>)',-1);
219  }
220}
221
222/**
223 * print a message
224 *
225 * If HTTP headers were not sent yet the message is added
226 * to the global message array else it's printed directly
227 * using html_msgarea()
228 *
229 *
230 * Levels can be:
231 *
232 * -1 error
233 *  0 info
234 *  1 success
235 *
236 * @author Andreas Gohr <andi@splitbrain.org>
237 * @see    html_msgarea
238 */
239function msg($message,$lvl=0,$line='',$file=''){
240  global $MSG;
241  $errors[-1] = 'error';
242  $errors[0]  = 'info';
243  $errors[1]  = 'success';
244  $errors[2]  = 'notify';
245
246  if($line || $file) $message.=' ['.basename($file).':'.$line.']';
247
248  if(!headers_sent()){
249    if(!isset($MSG)) $MSG = array();
250    $MSG[]=array('lvl' => $errors[$lvl], 'msg' => $message);
251  }else{
252    $MSG = array();
253    $MSG[]=array('lvl' => $errors[$lvl], 'msg' => $message);
254    if(function_exists('html_msgarea')){
255      html_msgarea();
256    }else{
257      print "ERROR($lvl) $message";
258    }
259  }
260}
261
262/**
263 * print debug messages
264 *
265 * little function to print the content of a var
266 *
267 * @author Andreas Gohr <andi@splitbrain.org>
268 */
269function dbg($msg,$hidden=false){
270  (!$hidden) ? print '<pre class="dbg">' : print "<!--\n";
271  print_r($msg);
272  (!$hidden) ? print '</pre>' : print "\n-->";
273}
274
275/**
276 * Print info to a log file
277 *
278 * @author Andreas Gohr <andi@splitbrain.org>
279 */
280function dbglog($msg){
281  global $conf;
282  if(is_object($msg) || is_array($msg)){
283    $msg = print_r($msg,true);
284  }
285
286  $file = $conf['cachedir'].'/debug.log';
287  $fh = fopen($file,'a');
288  if($fh){
289    fwrite($fh,date('H:i:s ').$_SERVER['REMOTE_ADDR'].': '.$msg."\n");
290    fclose($fh);
291  }
292}
293
294/**
295 * Print a reversed, prettyprinted backtrace
296 *
297 * @author Gary Owen <gary_owen@bigfoot.com>
298 */
299function dbg_backtrace(){
300  // Get backtrace
301  $backtrace = debug_backtrace();
302
303  // Unset call to debug_print_backtrace
304  array_shift($backtrace);
305
306  // Iterate backtrace
307  $calls = array();
308  $depth = count($backtrace) - 1;
309  foreach ($backtrace as $i => $call) {
310    $location = $call['file'] . ':' . $call['line'];
311    $function = (isset($call['class'])) ?
312    $call['class'] . $call['type'] . $call['function'] : $call['function'];
313
314    $params = array();
315    if (isset($call['args'])){
316        foreach($call['args'] as $arg){
317            if(is_object($arg)){
318                $params[] = '[Object '.get_class($arg).']';
319            }elseif(is_array($arg)){
320                $params[] = '[Array]';
321            }elseif(is_null($arg)){
322                $param[] = '[NULL]';
323            }else{
324                $params[] = (string) '"'.$arg.'"';
325            }
326        }
327    }
328    $params = implode(', ',$params);
329
330    $calls[$depth - $i] = sprintf('%s(%s) called at %s',
331                          $function,
332                          str_replace("\n", '\n', $params),
333                          $location);
334  }
335  ksort($calls);
336
337  return implode("\n", $calls);
338}
339
340/**
341 * Remove all data from an array where the key seems to point to sensitive data
342 *
343 * This is used to remove passwords, mail addresses and similar data from the
344 * debug output
345 *
346 * @author Andreas Gohr <andi@splitbrain.org>
347 */
348function debug_guard(&$data){
349    foreach($data as $key => $value){
350        if(preg_match('/(notify|pass|auth|secret|ftp|userinfo|token|buid|mail|proxy)/i',$key)){
351            $data[$key] = '***';
352            continue;
353        }
354        if(is_array($value)) debug_guard($data[$key]);
355    }
356}
357