xref: /dokuwiki/inc/infoutils.php (revision 43ee7484334f99fcb7122cc66ed3c831f94ff553) 
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(),'5.0.0','<')){
85    msg('Your PHP version is too old ('.phpversion().' vs. 5.0.0+ recommended)',-1);
86  }else{
87    msg('PHP version '.phpversion(),1);
88  }
89
90  $mem = (int) php_to_byte(ini_get('memory_limit'));
91  if($mem){
92    if($mem < 16777216){
93        msg('PHP is limited to less than 16MB RAM ('.$mem.' bytes). Increase memory_limit in php.ini',-1);
94    }elseif($mem < 20971520){
95        msg('PHP is limited to less than 20MB RAM ('.$mem.' bytes), you might encounter problems with bigger pages. Increase memory_limit in php.ini',-1);
96    }elseif($mem < 33554432){
97        msg('PHP is limited to less than 32MB RAM ('.$mem.' bytes), but that should be enough in most cases. If not, increase memory_limit in php.ini',0);
98    }else{
99        msg('More than 32MB RAM ('.$mem.' bytes) available.',1);
100    }
101  }
102
103
104  if(is_writable($conf['changelog'])){
105    msg('Changelog is writable',1);
106  }else{
107    if (@file_exists($conf['changelog'])) {
108      msg('Changelog is not writable',-1);
109    }
110  }
111
112  if (isset($conf['changelog_old']) && @file_exists($conf['changelog_old'])) {
113    msg('Old changelog exists', 0);
114  }
115
116  if (@file_exists($conf['changelog'].'_failed')) {
117    msg('Importing old changelog failed', -1);
118  } else if (@file_exists($conf['changelog'].'_importing')) {
119    msg('Importing old changelog now.', 0);
120  } else if (@file_exists($conf['changelog'].'_import_ok')) {
121    msg('Old changelog imported', 1);
122    if (!plugin_isdisabled('importoldchangelog')) {
123      msg('Importoldchangelog plugin not disabled after import', -1);
124    }
125  }
126
127  if(is_writable($conf['datadir'])){
128    msg('Datadir is writable',1);
129  }else{
130    msg('Datadir is not writable',-1);
131  }
132
133  if(is_writable($conf['olddir'])){
134    msg('Attic is writable',1);
135  }else{
136    msg('Attic is not writable',-1);
137  }
138
139  if(is_writable($conf['mediadir'])){
140    msg('Mediadir is writable',1);
141  }else{
142    msg('Mediadir is not writable',-1);
143  }
144
145  if(is_writable($conf['cachedir'])){
146    msg('Cachedir is writable',1);
147  }else{
148    msg('Cachedir is not writable',-1);
149  }
150
151  if(is_writable($conf['lockdir'])){
152    msg('Lockdir is writable',1);
153  }else{
154    msg('Lockdir is not writable',-1);
155  }
156
157  if($conf['authtype'] == 'plain'){
158    if(is_writable(DOKU_CONF.'users.auth.php')){
159      msg('conf/users.auth.php is writable',1);
160    }else{
161      msg('conf/users.auth.php is not writable',0);
162    }
163  }
164
165  if(function_exists('mb_strpos')){
166    if(defined('UTF8_NOMBSTRING')){
167      msg('mb_string extension is available but will not be used',0);
168    }else{
169      msg('mb_string extension is available and will be used',1);
170      if(ini_get('mbstring.func_overload') != 0){
171        msg('mb_string function overloading is enabled, this will cause problems and should be disabled',-1);
172      }
173    }
174  }else{
175    msg('mb_string extension not available - PHP only replacements will be used',0);
176  }
177
178  if($conf['allowdebug']){
179    msg('Debugging support is enabled. If you don\'t need it you should set $conf[\'allowdebug\'] = 0',-1);
180  }else{
181    msg('Debugging support is disabled',1);
182  }
183
184  if($INFO['userinfo']['name']){
185    msg('You are currently logged in as '.$_SERVER['REMOTE_USER'].' ('.$INFO['userinfo']['name'].')',0);
186    msg('You are part of the groups '.join($INFO['userinfo']['grps'],', '),0);
187  }else{
188    msg('You are currently not logged in',0);
189  }
190
191  msg('Your current permission for this page is '.$INFO['perm'],0);
192
193  if(is_writable($INFO['filepath'])){
194    msg('The current page is writable by the webserver',0);
195  }else{
196    msg('The current page is not writable by the webserver',0);
197  }
198
199  if($INFO['writable']){
200    msg('The current page is writable by you',0);
201  }else{
202    msg('The current page is not writable by you',0);
203  }
204
205  require_once(DOKU_INC.'inc/HTTPClient.php');
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 || $http->status == 403){
215    msg('The data directory seems to be properly protected',1);
216  }else{
217    msg('Failed to check if the data directory is accessible from the web.
218         Make sure this directory is properly protected
219         (See <a href="http://www.dokuwiki.org/security">security</a>)',-1);
220  }
221}
222
223/**
224 * print a message
225 *
226 * If HTTP headers were not sent yet the message is added
227 * to the global message array else it's printed directly
228 * using html_msgarea()
229 *
230 *
231 * Levels can be:
232 *
233 * -1 error
234 *  0 info
235 *  1 success
236 *
237 * @author Andreas Gohr <andi@splitbrain.org>
238 * @see    html_msgarea
239 */
240function msg($message,$lvl=0,$line='',$file=''){
241  global $MSG;
242  $errors[-1] = 'error';
243  $errors[0]  = 'info';
244  $errors[1]  = 'success';
245  $errors[2]  = 'notify';
246
247  if($line || $file) $message.=' ['.basename($file).':'.$line.']';
248
249  if(!headers_sent()){
250    if(!isset($MSG)) $MSG = array();
251    $MSG[]=array('lvl' => $errors[$lvl], 'msg' => $message);
252  }else{
253    $MSG = array();
254    $MSG[]=array('lvl' => $errors[$lvl], 'msg' => $message);
255    if(function_exists('html_msgarea')){
256      html_msgarea();
257    }else{
258      print "ERROR($lvl) $message";
259    }
260  }
261}
262
263/**
264 * print debug messages
265 *
266 * little function to print the content of a var
267 *
268 * @author Andreas Gohr <andi@splitbrain.org>
269 */
270function dbg($msg,$hidden=false){
271  (!$hidden) ? print '<pre class="dbg">' : print "<!--\n";
272  print_r($msg);
273  (!$hidden) ? print '</pre>' : print "\n-->";
274}
275
276/**
277 * Print info to a log file
278 *
279 * @author Andreas Gohr <andi@splitbrain.org>
280 */
281function dbglog($msg,$header=''){
282  global $conf;
283  if(is_object($msg) || is_array($msg)){
284    $msg = print_r($msg,true);
285  }
286
287  if($header) $msg = "$header\n$msg";
288
289  $file = $conf['cachedir'].'/debug.log';
290  $fh = fopen($file,'a');
291  if($fh){
292    fwrite($fh,date('H:i:s ').$_SERVER['REMOTE_ADDR'].': '.$msg."\n");
293    fclose($fh);
294  }
295}
296
297/**
298 * Print a reversed, prettyprinted backtrace
299 *
300 * @author Gary Owen <gary_owen@bigfoot.com>
301 */
302function dbg_backtrace(){
303  // Get backtrace
304  $backtrace = debug_backtrace();
305
306  // Unset call to debug_print_backtrace
307  array_shift($backtrace);
308
309  // Iterate backtrace
310  $calls = array();
311  $depth = count($backtrace) - 1;
312  foreach ($backtrace as $i => $call) {
313    $location = $call['file'] . ':' . $call['line'];
314    $function = (isset($call['class'])) ?
315    $call['class'] . $call['type'] . $call['function'] : $call['function'];
316
317    $params = array();
318    if (isset($call['args'])){
319        foreach($call['args'] as $arg){
320            if(is_object($arg)){
321                $params[] = '[Object '.get_class($arg).']';
322            }elseif(is_array($arg)){
323                $params[] = '[Array]';
324            }elseif(is_null($arg)){
325                $param[] = '[NULL]';
326            }else{
327                $params[] = (string) '"'.$arg.'"';
328            }
329        }
330    }
331    $params = implode(', ',$params);
332
333    $calls[$depth - $i] = sprintf('%s(%s) called at %s',
334                          $function,
335                          str_replace("\n", '\n', $params),
336                          $location);
337  }
338  ksort($calls);
339
340  return implode("\n", $calls);
341}
342
343/**
344 * Remove all data from an array where the key seems to point to sensitive data
345 *
346 * This is used to remove passwords, mail addresses and similar data from the
347 * debug output
348 *
349 * @author Andreas Gohr <andi@splitbrain.org>
350 */
351function debug_guard(&$data){
352    foreach($data as $key => $value){
353        if(preg_match('/(notify|pass|auth|secret|ftp|userinfo|token|buid|mail|proxy)/i',$key)){
354            $data[$key] = '***';
355            continue;
356        }
357        if(is_array($value)) debug_guard($data[$key]);
358    }
359}
360