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<?php
/**
* File IO functions
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Andreas Gohr <andi@splitbrain.org>
*/
if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../').'/');
require_once(DOKU_INC.'inc/common.php');
/**
* Removes empty directories
*
* @todo use safemode hack
* @author Andreas Gohr <andi@splitbrain.org>
*/
function io_sweepNS($id){
global $conf;
//scan all namespaces
while(($id = getNS($id)) !== false){
$dir = $conf['datadir'].'/'.str_replace(':','/',$id);
$dir = utf8_encodeFN($dir);
//try to delete dir else return
if(!@rmdir($dir)) return;
}
}
/**
* Returns content of $file as cleaned string.
*
* Uses gzip if extension is .gz
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function io_readFile($file){
$ret = '';
if(@file_exists($file)){
if(substr($file,-3) == '.gz'){
$ret = join('',gzfile($file));
}else{
$ret = join('',file($file));
}
}
return cleanText($ret);
}
/**
* Saves $content to $file.
*
* Uses gzip if extension is .gz
*
* @author Andreas Gohr <andi@splitbrain.org>
* @return bool true on success
*/
function io_saveFile($file,$content){
io_makeFileDir($file);
io_lock($file);
if(substr($file,-3) == '.gz'){
$fh = @gzopen($file,'wb9');
if(!$fh){
msg("Writing $file failed",-1);
return false;
}
gzwrite($fh, $content);
gzclose($fh);
}else{
$fh = @fopen($file,'wb');
if(!$fh){
msg("Writing $file failed",-1);
return false;
}
fwrite($fh, $content);
fclose($fh);
}
io_unlock($file);
return true;
}
/**
* Tries to lock a file
*
* Locking is only done for io_savefile and uses directories
* inside $conf['lockdir']
*
* It waits maximal 3 seconds for the lock, after this time
* the lock is assumed to be stale and the function goes on
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function io_lock($file){
global $conf;
// no locking if safemode hack
if($conf['safemodehack']) return;
$lockDir = $conf['lockdir'].'/'.md5($file);
@ignore_user_abort(1);
$timeStart = time();
do {
//waited longer than 3 seconds? -> stale lock
if ((time() - $timeStart) > 3) break;
$locked = @mkdir($lockDir);
} while ($locked === false);
}
/**
* Unlocks a file
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function io_unlock($file){
global $conf;
// no locking if safemode hack
if($conf['safemodehack']) return;
$lockDir = $conf['lockdir'].'/'.md5($file);
@rmdir($lockDir);
@ignore_user_abort(0);
}
/**
* Create the directory needed for the given file
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function io_makeFileDir($file){
global $conf;
$dir = dirname($file);
umask($conf['dmask']);
if(!is_dir($dir)){
io_mkdir_p($dir) || msg("Creating directory $dir failed",-1);
}
umask($conf['umask']);
}
/**
* Creates a directory hierachy.
*
* @link http://www.php.net/manual/en/function.mkdir.php
* @author <saint@corenova.com>
* @author Andreas Gohr <andi@splitbrain.org>
*/
function io_mkdir_p($target){
global $conf;
if (is_dir($target)||empty($target)) return 1; // best case check first
if (@file_exists($target) && !is_dir($target)) return 0;
//recursion
if (io_mkdir_p(substr($target,0,strrpos($target,'/')))){
if($conf['safemodehack']){
$dir = preg_replace('/^'.preg_quote(realpath($conf['ftp']['root']),'/').'/','', $target);
return io_mkdir_ftp($dir);
}else{
return @mkdir($target,0777); // crawl back up & create dir tree
}
}
return 0;
}
/**
* Creates a directory using FTP
*
* This is used when the safemode workaround is enabled
*
* @author <andi@splitbrain.org>
*/
function io_mkdir_ftp($dir){
global $conf;
if(!function_exists('ftp_connect')){
msg("FTP support not found - safemode workaround not usable",-1);
return false;
}
$conn = @ftp_connect($conf['ftp']['host'],$conf['ftp']['port'],10);
if(!$conn){
msg("FTP connection failed",-1);
return false;
}
if(!@ftp_login($conn, $conf['ftp']['user'], $conf['ftp']['pass'])){
msg("FTP login failed",-1);
return false;
}
//create directory
$ok = @ftp_mkdir($conn, $dir);
//set permissions (using the directory umask)
@ftp_site($conn,sprintf("CHMOD %04o %s",(0777 - $conf['dmask']),$dir));
@ftp_close($conn);
return $ok;
}
/**
* downloads a file from the net and saves it to the given location
*
* @author Andreas Gohr <andi@splitbrain.org>
* @todo Add size limit
*/
function io_download($url,$file){
$fp = @fopen($url,"rb");
if(!$fp) return false;
$kb = 0;
$now = time();
while(!feof($fp)){
if($kb++ > 2048 || (time() - $now) > 45){
//abort on 2 MB and timeout on 45 sec
return false;
}
$cont.= fread($fp,1024);
}
fclose($fp);
$fp2 = @fopen($file,"w");
if(!$fp2) return false;
fwrite($fp2,$cont);
fclose($fp2);
return true;
}
/**
* Runs an external command and returns it's output as string
*
* @author Harry Brueckner <harry_b@eml.cc>
* @author Andreas Gohr <andi@splitbrain.org>
* @deprecated
*/
function io_runcmd($cmd){
$fh = popen($cmd, "r");
if(!$fh) return false;
$ret = '';
while (!feof($fh)) {
$ret .= fread($fh, 8192);
}
pclose($fh);
return $ret;
}
//Setup VIM: ex: et ts=2 enc=utf-8 :
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