xref: /dokuwiki/inc/init.php (revision 6ae7cff52259b73ed8da9ad51e61240c8125d305) 
1<?php
2/**
3 * Initialize some defaults needed for DokuWiki
4 */
5
6// start timing Dokuwiki execution
7function delta_time($start=0) {
8    list($usec, $sec) = explode(" ", microtime());
9    return ((float)$usec+(float)$sec)-((float)$start);
10}
11define('DOKU_START_TIME', delta_time());
12
13global $config_cascade;
14$config_cascade = '';
15
16// if available load a preload config file
17$preload = fullpath(dirname(__FILE__)).'/preload.php';
18if (@file_exists($preload)) include($preload);
19
20// define the include path
21if(!defined('DOKU_INC')) define('DOKU_INC',fullpath(dirname(__FILE__).'/../').'/');
22
23// define config path (packagers may want to change this to /etc/dokuwiki/)
24if(!defined('DOKU_CONF')) define('DOKU_CONF',DOKU_INC.'conf/');
25
26// check for error reporting override or set error reporting to sane values
27if (!defined('DOKU_E_LEVEL') && @file_exists(DOKU_CONF.'report_e_all')) {
28    define('DOKU_E_LEVEL', E_ALL);
29}
30if (!defined('DOKU_E_LEVEL')) {
31    if(defined('E_DEPRECATED')){ // since php 5.3
32        error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
33    }else{
34        error_reporting(E_ALL ^ E_NOTICE);
35    }
36} else {
37    error_reporting(DOKU_E_LEVEL);
38}
39
40// init memory caches
41global $cache_revinfo;
42       $cache_revinfo = array();
43global $cache_wikifn;
44       $cache_wikifn = array();
45global $cache_cleanid;
46       $cache_cleanid = array();
47global $cache_authname;
48       $cache_authname = array();
49global $cache_metadata;
50       $cache_metadata = array();
51
52//set the configuration cascade - but only if its not already been set in preload.php
53if (empty($config_cascade)) {
54    $config_cascade = array(
55            'main' => array(
56                'default'   => array(DOKU_CONF.'dokuwiki.php'),
57                'local'     => array(DOKU_CONF.'local.php'),
58                'protected' => array(DOKU_CONF.'local.protected.php'),
59                ),
60            'acronyms'  => array(
61                'default'   => array(DOKU_CONF.'acronyms.conf'),
62                'local'     => array(DOKU_CONF.'acronyms.local.conf'),
63                ),
64            'entities'  => array(
65                'default'   => array(DOKU_CONF.'entities.conf'),
66                'local'     => array(DOKU_CONF.'entities.local.conf'),
67                ),
68            'interwiki' => array(
69                'default'   => array(DOKU_CONF.'interwiki.conf'),
70                'local'     => array(DOKU_CONF.'interwiki.local.conf'),
71                ),
72            'license' => array(
73                'default'   => array(DOKU_CONF.'license.php'),
74                'local'     => array(DOKU_CONF.'license.local.php'),
75                ),
76            'mediameta' => array(
77                    'default'   => array(DOKU_CONF.'mediameta.php'),
78                    'local'     => array(DOKU_CONF.'mediameta.local.php'),
79                    ),
80            'mime'      => array(
81                    'default'   => array(DOKU_CONF.'mime.conf'),
82                    'local'     => array(DOKU_CONF.'mime.local.conf'),
83                    ),
84            'scheme'    => array(
85                    'default'   => array(DOKU_CONF.'scheme.conf'),
86                    'local'     => array(DOKU_CONF.'scheme.local.conf'),
87                    ),
88            'smileys'   => array(
89                    'default'   => array(DOKU_CONF.'smileys.conf'),
90                    'local'     => array(DOKU_CONF.'smileys.local.conf'),
91                    ),
92            'wordblock' => array(
93                    'default'   => array(DOKU_CONF.'wordblock.conf'),
94                    'local'     => array(DOKU_CONF.'wordblock.local.conf'),
95                    ),
96            );
97}
98
99//prepare config array()
100global $conf;
101$conf = array();
102
103// load the global config file(s)
104foreach (array('default','local','protected') as $config_group) {
105    if (empty($config_cascade['main'][$config_group])) continue;
106    foreach ($config_cascade['main'][$config_group] as $config_file) {
107        if (@file_exists($config_file)) {
108            include($config_file);
109        }
110    }
111}
112
113//prepare language array
114global $lang;
115$lang = array();
116
117//load the language files
118require_once(DOKU_INC.'inc/lang/en/lang.php');
119if ( $conf['lang'] && $conf['lang'] != 'en' ) {
120    require_once(DOKU_INC.'inc/lang/'.$conf['lang'].'/lang.php');
121}
122
123//prepare license array()
124global $license;
125$license = array();
126
127// load the license file(s)
128foreach (array('default','local') as $config_group) {
129    if (empty($config_cascade['license'][$config_group])) continue;
130    foreach ($config_cascade['license'][$config_group] as $config_file) {
131        if(@file_exists($config_file)){
132            include($config_file);
133        }
134    }
135}
136
137// set timezone (as in pre 5.3.0 days)
138date_default_timezone_set(@date_default_timezone_get());
139
140// define baseURL
141if(!defined('DOKU_REL')) define('DOKU_REL',getBaseURL(false));
142if(!defined('DOKU_URL')) define('DOKU_URL',getBaseURL(true));
143if(!defined('DOKU_BASE')){
144    if($conf['canonical']){
145        define('DOKU_BASE',DOKU_URL);
146    }else{
147        define('DOKU_BASE',DOKU_REL);
148    }
149}
150
151// define whitespace
152if(!defined('DOKU_LF')) define ('DOKU_LF',"\n");
153if(!defined('DOKU_TAB')) define ('DOKU_TAB',"\t");
154
155// define cookie and session id, append server port when securecookie is configured FS#1664
156if (!defined('DOKU_COOKIE')) define('DOKU_COOKIE', 'DW'.md5(DOKU_REL.(($conf['securecookie'])?$_SERVER['SERVER_PORT']:'')));
157
158// define Plugin dir
159if(!defined('DOKU_PLUGIN'))  define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
160
161// define main script
162if(!defined('DOKU_SCRIPT')) define('DOKU_SCRIPT','doku.php');
163
164// define Template baseURL
165if(!defined('DOKU_TPL')) define('DOKU_TPL',
166        DOKU_BASE.'lib/tpl/'.$conf['template'].'/');
167
168// define real Template directory
169if(!defined('DOKU_TPLINC')) define('DOKU_TPLINC',
170        DOKU_INC.'lib/tpl/'.$conf['template'].'/');
171
172// make session rewrites XHTML compliant
173@ini_set('arg_separator.output', '&amp;');
174
175// make sure global zlib does not interfere FS#1132
176@ini_set('zlib.output_compression', 'off');
177
178// increase PCRE backtrack limit
179@ini_set('pcre.backtrack_limit', '20971520');
180
181// enable gzip compression if supported
182$conf['gzip_output'] &= (strpos($_SERVER['HTTP_ACCEPT_ENCODING'],'gzip') !== false);
183if ($conf['gzip_output'] &&
184        !defined('DOKU_DISABLE_GZIP_OUTPUT') &&
185        function_exists('ob_gzhandler')) {
186    ob_start('ob_gzhandler');
187}
188
189// init session
190if (!headers_sent() && !defined('NOSESSION')){
191    session_name("DokuWiki");
192    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
193        session_set_cookie_params(0,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
194    }else{
195        session_set_cookie_params(0,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
196    }
197    session_start();
198
199    // load left over messages
200    if(isset($_SESSION[DOKU_COOKIE]['msg'])){
201        $MSG = $_SESSION[DOKU_COOKIE]['msg'];
202        unset($_SESSION[DOKU_COOKIE]['msg']);
203    }
204}
205
206// kill magic quotes
207if (get_magic_quotes_gpc() && !defined('MAGIC_QUOTES_STRIPPED')) {
208    if (!empty($_GET))    remove_magic_quotes($_GET);
209    if (!empty($_POST))   remove_magic_quotes($_POST);
210    if (!empty($_COOKIE)) remove_magic_quotes($_COOKIE);
211    if (!empty($_REQUEST)) remove_magic_quotes($_REQUEST);
212    @ini_set('magic_quotes_gpc', 0);
213    define('MAGIC_QUOTES_STRIPPED',1);
214}
215@set_magic_quotes_runtime(0);
216@ini_set('magic_quotes_sybase',0);
217
218// don't let cookies ever interfere with request vars
219$_REQUEST = array_merge($_GET,$_POST);
220
221// we don't want a purge URL to be digged
222if(isset($_REQUEST['purge']) && $_SERVER['HTTP_REFERER']) unset($_REQUEST['purge']);
223
224// disable gzip if not available
225if($conf['compression'] == 'bz2' && !function_exists('bzopen')){
226    $conf['compression'] = 'gz';
227}
228if($conf['compression'] == 'gz' && !function_exists('gzopen')){
229    $conf['compression'] = 0;
230}
231
232// fix dateformat for upgraders
233if(strpos($conf['dformat'],'%') === false){
234    $conf['dformat'] = '%Y/%m/%d %H:%M';
235}
236
237// precalculate file creation modes
238init_creationmodes();
239
240// make real paths and check them
241init_paths();
242init_files();
243
244// automatic upgrade to script versions of certain files
245scriptify(DOKU_CONF.'users.auth');
246scriptify(DOKU_CONF.'acl.auth');
247
248
249/**
250 * Checks paths from config file
251 */
252function init_paths(){
253    global $conf;
254
255    $paths = array('datadir'   => 'pages',
256            'olddir'    => 'attic',
257            'mediadir'  => 'media',
258            'metadir'   => 'meta',
259            'cachedir'  => 'cache',
260            'indexdir'  => 'index',
261            'lockdir'   => 'locks',
262            'tmpdir'    => 'tmp');
263
264    foreach($paths as $c => $p){
265        if(empty($conf[$c]))  $conf[$c] = $conf['savedir'].'/'.$p;
266        $conf[$c]             = init_path($conf[$c]);
267        if(empty($conf[$c]))  nice_die("The $c ('$p') does not exist, isn't accessible or writable.
268                You should check your config and permission settings.
269                Or maybe you want to <a href=\"install.php\">run the
270                installer</a>?");
271    }
272
273    // path to old changelog only needed for upgrading
274    $conf['changelog_old'] = init_path((isset($conf['changelog']))?($conf['changelog']):($conf['savedir'].'/changes.log'));
275    if ($conf['changelog_old']=='') { unset($conf['changelog_old']); }
276    // hardcoded changelog because it is now a cache that lives in meta
277    $conf['changelog'] = $conf['metadir'].'/_dokuwiki.changes';
278    $conf['media_changelog'] = $conf['metadir'].'/_media.changes';
279}
280
281/**
282 * Checks the existance of certain files and creates them if missing.
283 */
284function init_files(){
285    global $conf;
286
287    $files = array( $conf['indexdir'].'/page.idx');
288
289    foreach($files as $file){
290        if(!@file_exists($file)){
291            $fh = @fopen($file,'a');
292            if($fh){
293                fclose($fh);
294                if($conf['fperm']) chmod($file, $conf['fperm']);
295            }else{
296                nice_die("$file is not writable. Check your permissions settings!");
297            }
298        }
299    }
300}
301
302/**
303 * Returns absolute path
304 *
305 * This tries the given path first, then checks in DOKU_INC.
306 * Check for accessability on directories as well.
307 *
308 * @author Andreas Gohr <andi@splitbrain.org>
309 */
310function init_path($path){
311    // check existance
312    $p = fullpath($path);
313    if(!@file_exists($p)){
314        $p = fullpath(DOKU_INC.$path);
315        if(!@file_exists($p)){
316            return '';
317        }
318    }
319
320    // check writability
321    if(!@is_writable($p)){
322        return '';
323    }
324
325    // check accessability (execute bit) for directories
326    if(@is_dir($p) && !@file_exists("$p/.")){
327        return '';
328    }
329
330    return $p;
331}
332
333/**
334 * Sets the internal config values fperm and dperm which, when set,
335 * will be used to change the permission of a newly created dir or
336 * file with chmod. Considers the influence of the system's umask
337 * setting the values only if needed.
338 */
339function init_creationmodes(){
340    global $conf;
341
342    // Legacy support for old umask/dmask scheme
343    unset($conf['dmask']);
344    unset($conf['fmask']);
345    unset($conf['umask']);
346    unset($conf['fperm']);
347    unset($conf['dperm']);
348
349    // get system umask, fallback to 0 if none available
350    $umask = @umask();
351    if(!$umask) $umask = 0000;
352
353    // check what is set automatically by the system on file creation
354    // and set the fperm param if it's not what we want
355    $auto_fmode = 0666 & ~$umask;
356    if($auto_fmode != $conf['fmode']) $conf['fperm'] = $conf['fmode'];
357
358    // check what is set automatically by the system on file creation
359    // and set the dperm param if it's not what we want
360    $auto_dmode = $conf['dmode'] & ~$umask;
361    if($auto_dmode != $conf['dmode']) $conf['dperm'] = $conf['dmode'];
362}
363
364/**
365 * remove magic quotes recursivly
366 *
367 * @author Andreas Gohr <andi@splitbrain.org>
368 */
369function remove_magic_quotes(&$array) {
370    foreach (array_keys($array) as $key) {
371        // handle magic quotes in keynames (breaks order)
372        $sk = stripslashes($key);
373        if($sk != $key){
374            $array[$sk] = $array[$key];
375            unset($array[$key]);
376            $key = $sk;
377        }
378
379        // do recursion if needed
380        if (is_array($array[$key])) {
381            remove_magic_quotes($array[$key]);
382        }else {
383            $array[$key] = stripslashes($array[$key]);
384        }
385    }
386}
387
388/**
389 * Returns the full absolute URL to the directory where
390 * DokuWiki is installed in (includes a trailing slash)
391 *
392 * @author Andreas Gohr <andi@splitbrain.org>
393 */
394function getBaseURL($abs=null){
395    global $conf;
396    //if canonical url enabled always return absolute
397    if(is_null($abs)) $abs = $conf['canonical'];
398
399    if($conf['basedir']){
400        $dir = $conf['basedir'];
401    }elseif(substr($_SERVER['SCRIPT_NAME'],-4) == '.php'){
402        $dir = dirname($_SERVER['SCRIPT_NAME']);
403    }elseif(substr($_SERVER['PHP_SELF'],-4) == '.php'){
404        $dir = dirname($_SERVER['PHP_SELF']);
405    }elseif($_SERVER['DOCUMENT_ROOT'] && $_SERVER['SCRIPT_FILENAME']){
406        $dir = preg_replace ('/^'.preg_quote($_SERVER['DOCUMENT_ROOT'],'/').'/','',
407                $_SERVER['SCRIPT_FILENAME']);
408        $dir = dirname('/'.$dir);
409    }else{
410        $dir = '.'; //probably wrong
411    }
412
413    $dir = str_replace('\\','/',$dir);             // bugfix for weird WIN behaviour
414    $dir = preg_replace('#//+#','/',"/$dir/");     // ensure leading and trailing slashes
415
416    //handle script in lib/exe dir
417    $dir = preg_replace('!lib/exe/$!','',$dir);
418
419    //handle script in lib/plugins dir
420    $dir = preg_replace('!lib/plugins/.*$!','',$dir);
421
422    //finish here for relative URLs
423    if(!$abs) return $dir;
424
425    //use config option if available, trim any slash from end of baseurl to avoid multiple consecutive slashes in the path
426    if($conf['baseurl']) return rtrim($conf['baseurl'],'/').$dir;
427
428    //split hostheader into host and port
429    $addr = explode(':',$_SERVER['HTTP_HOST']);
430    $host = $addr[0];
431    $port = '';
432    if (isset($addr[1])) {
433        $port = $addr[1];
434    } elseif (isset($_SERVER['SERVER_PORT'])) {
435        $port = $_SERVER['SERVER_PORT'];
436    }
437    if(!is_ssl()){
438        $proto = 'http://';
439        if ($port == '80') {
440            $port = '';
441        }
442    }else{
443        $proto = 'https://';
444        if ($port == '443') {
445            $port = '';
446        }
447    }
448
449    if($port !== '') $port = ':'.$port;
450
451    return $proto.$host.$port.$dir;
452}
453
454/**
455 * Check if accessed via HTTPS
456 *
457 * Apache leaves ,$_SERVER['HTTPS'] empty when not available, IIS sets it to 'off'.
458 * 'false' and 'disabled' are just guessing
459 *
460 * @returns bool true when SSL is active
461 */
462function is_ssl(){
463    if (!isset($_SERVER['HTTPS']) ||
464        preg_match('/^(|off|false|disabled)$/i',$_SERVER['HTTPS'])){
465        return false;
466    }else{
467        return true;
468    }
469}
470
471/**
472 * Append a PHP extension to a given file and adds an exit call
473 *
474 * This is used to migrate some old configfiles. An added PHP extension
475 * ensures the contents are not shown to webusers even if .htaccess files
476 * do not work
477 *
478 * @author Jan Decaluwe <jan@jandecaluwe.com>
479 */
480function scriptify($file) {
481    // checks
482    if (!is_readable($file)) {
483        return;
484    }
485    $fn = $file.'.php';
486    if (@file_exists($fn)) {
487        return;
488    }
489    $fh = fopen($fn, 'w');
490    if (!$fh) {
491        nice_die($fn.' is not writable. Check your permission settings!');
492    }
493    // write php exit hack first
494    fwrite($fh, "# $fn\n");
495    fwrite($fh, '# <?php exit()?>'."\n");
496    fwrite($fh, "# Don't modify the lines above\n");
497    fwrite($fh, "#\n");
498    // copy existing lines
499    $lines = file($file);
500    foreach ($lines as $line){
501        fwrite($fh, $line);
502    }
503    fclose($fh);
504    //try to rename the old file
505    io_rename($file,"$file.old");
506}
507
508/**
509 * print a nice message even if no styles are loaded yet.
510 */
511function nice_die($msg){
512    echo<<<EOT
513<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
514    "http://www.w3.org/TR/html4/loose.dtd">
515<html>
516<head><title>DokuWiki Setup Error</title></head>
517<body style="font-family: Arial, sans-serif">
518    <div style="width:60%; margin: auto; background-color: #fcc;
519                border: 1px solid #faa; padding: 0.5em 1em;">
520        <h1 style="font-size: 120%">DokuWiki Setup Error</h1>
521        <p>$msg</p>
522    </div>
523</body>
524</html>
525EOT;
526    exit;
527}
528
529
530/**
531 * A realpath() replacement
532 *
533 * This function behaves similar to PHP's realpath() but does not resolve
534 * symlinks or accesses upper directories
535 *
536 * @author Andreas Gohr <andi@splitbrain.org>
537 * @author <richpageau at yahoo dot co dot uk>
538 * @link   http://de3.php.net/manual/en/function.realpath.php#75992
539 */
540function fullpath($path,$exists=false){
541    static $run = 0;
542    $root  = '';
543    $iswin = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' || @$GLOBALS['DOKU_UNITTEST_ASSUME_WINDOWS']);
544
545    // find the (indestructable) root of the path - keeps windows stuff intact
546    if($path{0} == '/'){
547        $root = '/';
548    }elseif($iswin){
549        // match drive letter and UNC paths
550        if(preg_match('!^([a-zA-z]:)(.*)!',$path,$match)){
551            $root = $match[1].'/';
552            $path = $match[2];
553        }else if(preg_match('!^(\\\\\\\\[^\\\\/]+\\\\[^\\\\/]+[\\\\/])(.*)!',$path,$match)){
554            $root = $match[1];
555            $path = $match[2];
556        }
557    }
558    $path = str_replace('\\','/',$path);
559
560    // if the given path wasn't absolute already, prepend the script path and retry
561    if(!$root){
562        $base = dirname($_SERVER['SCRIPT_FILENAME']);
563        $path = $base.'/'.$path;
564        if($run == 0){ // avoid endless recursion when base isn't absolute for some reason
565            $run++;
566            return fullpath($path,$exists);
567        }
568    }
569    $run = 0;
570
571    // canonicalize
572    $path=explode('/', $path);
573    $newpath=array();
574    foreach($path as $p) {
575        if ($p === '' || $p === '.') continue;
576        if ($p==='..') {
577            array_pop($newpath);
578            continue;
579        }
580        array_push($newpath, $p);
581    }
582    $finalpath = $root.implode('/', $newpath);
583
584    // check for existance when needed (except when unit testing)
585    if($exists && !defined('DOKU_UNITTEST') && !@file_exists($finalpath)) {
586        return false;
587    }
588    return $finalpath;
589}
590
591
592
593