system.inc.php 60.1 KB
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<?php
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/*
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Copyright (c) 2007, Till Brehm, projektfarm Gmbh
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All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    * Neither the name of ISPConfig nor the names of its contributors
      may be used to endorse or promote products derived from this software without
      specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

class system{

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	var $FILE = '/root/ispconfig/scripts/lib/classes/ispconfig_system.lib.php';
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	var $server_id;
	var $server_conf;
	var $data;
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	var $min_uid = 500;
	var $min_gid = 500;
	
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	private $_last_exec_out = null;
	private $_last_exec_retcode = null;
	
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	/**
	 * Construct for this class
	 *
	 * @return system
	 */
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	public function __construct(){
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		//global $go_info;
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		//$this->server_id = $go_info['isp']['server_id'];
		//$this->server_conf = $go_info['isp']['server_conf'];
		$this->server_conf['passwd_datei'] = '/etc/passwd';
		$this->server_conf['shadow_datei'] = '/etc/shadow';
		$this->server_conf['group_datei'] = '/etc/group';
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	}
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	/**
	 * Get the hostname from the server
	 *
	 * @return string
	 */
	public function hostname(){
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		$dist = $this->server_conf['dist'];
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		ob_start();
		passthru('hostname');
		$hostname = ob_get_contents();
		ob_end_clean();
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		$hostname = trim($hostname);
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		ob_start();
		if(!strstr($dist, 'freebsd')){
			passthru('dnsdomainname');
		} else {
			passthru('domainname');
		}
		$domainname = ob_get_contents();
		ob_end_clean();
		$domainname = trim($domainname);
		if($domainname != ""){
			if(!strstr($hostname, $domainname)) $hostname .= ".".$domainname;
		}
		return $hostname;
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	}
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	/**
	 * Add an user to the system
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	 *
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	 */
	public function adduser($user_username, $uid, $gid, $username, $homedir, $shell, $passwort = '*'){
		global $app;
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		if($this->is_user($user_username)){
			return false;
		} else {
			if(trim($user_username) != '') {
				$user_datei = $this->server_conf['passwd_datei'];
				$shadow_datei = $this->server_conf['shadow_datei'];
				$shell = realpath($shell);
				if(trim($passwort) == '') $passwort = '*';
				$new_user = "\n$user_username:x:$uid:$gid:$username:$homedir:$shell\n";
				$app->log->msg('USER: '.$new_user);
				$app->file->af($user_datei, $new_user);
				if($shadow_datei == '/etc/shadow'){
					$datum = time();
					$tage = floor($datum/86400);
					$new_passwd = "\n$user_username:$passwort:$tage:0:99999:7:::\n";
				} else {
					$new_passwd = "\n$user_username:$passwort:$uid:$gid::0:0:$username:$homedir:$shell\n";
				}
				$app->file->af($shadow_datei, $new_passwd);
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				// TB: leere Zeilen entfernen
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				$app->file->remove_blank_lines($shadow_datei);
				$app->file->remove_blank_lines($user_datei);
				// TB: user Sortierung deaktiviert
				//$this->order_users_groups();
				if($shadow_datei != '/etc/shadow'){
					$app->file->af($shadow_datei, "\n");
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					// TB: leere Zeilen entfernen
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					$app->file->remove_blank_lines($shadow_datei);
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					$app->log->caselog("pwd_mkdb $shadow_datei &> /dev/null", $this->FILE, __LINE__);
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				}
				return true;
			}
		}
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	}
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	/**
	 * Update users when someone edit it
	 *
	 */
	function updateuser($user_username, $uid, $gid, $username, $homedir, $shell, $passwort = '*'){
		//* First delete the users
		$this->deluser($user_username);
		//* Add the user again
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		$this->adduser($user_username, $uid, $gid, $username, $homedir, $shell, $passwort);
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	}
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	/**
	 * Lock the user
	 *
	 */
	function deactivateuser($user_username){
		$passwort = str_rot13($this->getpasswd($user_username));
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		$user_attr = $this->get_user_attributes($user_username);
		$uid = $user_attr['uid'];
		$gid = $user_attr['gid'];
		$username = $user_attr['name'];
		$homedir = $user_attr['homedir'];
		$shell = '/dev/null';
		$this->deluser($user_username);
		$this->adduser($user_username, $uid, $gid, $username, $homedir, $shell, $passwort);
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	}
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	/**
	 * Delete a user from the system
	 *
	 */
	function deluser($user_username){
		global $app;
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		if($this->is_user($user_username)){
			$user_datei = $this->server_conf['passwd_datei'];
			$shadow_datei = $this->server_conf['shadow_datei'];
			$users = $app->file->rf($user_datei);
			$lines = explode("\n", $users);
			if(is_array($lines)){
				$num_lines = sizeof($lines);
				for($i=0;$i<$num_lines;$i++){
					if(trim($lines[$i]) != ''){
						list($f1, ) = explode(':', $lines[$i]);
						if($f1 != $user_username) $new_lines[] = $lines[$i];
					}
				}
				$new_users = implode("\n", $new_lines);
				$app->file->wf($user_datei, $new_users);
				unset($new_lines);
				unset($lines);
				unset($new_users);
			}
			$app->file->remove_blank_lines($user_datei);

			$passwds = $app->file->rf($shadow_datei);
			$lines = explode("\n", $passwds);
			if(is_array($lines)){
				$num_lines = sizeof($lines);
				for($i=0;$i<$num_lines;$i++){
					if(trim($lines[$i]) != ''){
						list($f1, ) = explode(':', $lines[$i]);
						if($f1 != $user_username) $new_lines[] = $lines[$i];
					}
				}
				$new_passwds = implode("\n", $new_lines);
				$app->file->wf($shadow_datei, $new_passwds);
				unset($new_lines);
				unset($lines);
				unset($new_passwds);
			}
			$app->file->remove_blank_lines($shadow_datei);

			$group_file = $app->file->rf($this->server_conf['group_datei']);
			$group_file_lines = explode("\n", $group_file);
			foreach($group_file_lines as $group_file_line){
				if(trim($group_file_line) != ''){
					list($f1, $f2, $f3, $f4) = explode(':', $group_file_line);
					$group_users = explode(',', str_replace(' ', '', $f4));
					if(in_array($user_username, $group_users)){
						$g_users = array();
						foreach($group_users as $group_user){
							if($group_user != $user_username) $g_users[] = $group_user;
						}
						$f4 = implode(',', $g_users);
					}
					$new_group_file[] = $f1.':'.$f2.':'.$f3.':'.$f4;
				}
			}
			$new_group_file = implode("\n", $new_group_file);
			$app->file->wf($this->server_conf['group_datei'], $new_group_file);
			// TB: auskommentiert
			//$this->order_users_groups();

			if($shadow_datei != '/etc/shadow'){
				$app->file->af($shadow_datei, "\n");
				$app->log->caselog("pwd_mkdb $shadow_datei &> /dev/null", $this->FILE, __LINE__);
			}
			return true;
		} else {
			return false;
		}
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	}
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	/**
	 * Add a usergroup to the system
	 *
	 */
	function addgroup($group, $gid, $members = ''){
		global $app;
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		if($this->is_group($group)){
			return false;
		} else {
			$group_datei = $this->server_conf['group_datei'];
			$shadow_datei = $this->server_conf['shadow_datei'];
			$new_group = "\n$group:x:$gid:$members\n";
			$app->file->af($group_datei, $new_group);

			// TB: auskommentiert
			//$this->order_users_groups();
			if($shadow_datei != '/etc/shadow'){
				$app->log->caselog("pwd_mkdb $shadow_datei &> /dev/null", $this->FILE, __LINE__);
			}
			return true;
		}
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	}
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	/**
	 * Update usersgroup in way to delete and add it again
	 *
	 */
	function updategroup($group, $gid, $members = ''){
		$this->delgroup($group);
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		$this->addgroup($group, $gid, $members);
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	}
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	/**
	 * Delete a usergroup from the system
	 *
	 */
	function delgroup($group){
		global $app;
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		if($this->is_group($group)){
			$group_datei = $this->server_conf['group_datei'];
			$shadow_datei = $this->server_conf['shadow_datei'];
			$groups = $app->file->rf($group_datei);
			$lines = explode("\n", $groups);
			if(is_array($lines)){
				$num_lines = sizeof($lines);
				for($i=0;$i<$num_lines;$i++){
					if(trim($lines[$i]) != ''){
						list($f1, ) = explode(':', $lines[$i]);
						if($f1 != $group) $new_lines[] = $lines[$i];
					}
				}
				$new_groups = implode("\n", $new_lines);
				$app->file->wf($group_datei, $new_groups);
				unset($new_lines);
				unset($lines);
				unset($new_groups);
			}
			// TB: auskommentiert
			//$this->order_users_groups();
			if($shadow_datei != '/etc/shadow'){
				$app->log->caselog("pwd_mkdb $shadow_datei &> /dev/null", $this->FILE, __LINE__);
			}
			return true;
		} else {
			return false;
		}
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	}
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	/**
	 * Order usergroups
	 *
	 */
	function order_users_groups(){
		global $app;
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		$user_datei = $this->server_conf['passwd_datei'];
		$shadow_datei = $this->server_conf['shadow_datei'];
		$group_datei = $this->server_conf['group_datei'];

		$groups = $app->file->no_comments($group_datei);
		$lines = explode("\n", $groups);
		if(is_array($lines)){
			foreach($lines as $line){
				if(trim($line) != ''){
					list($f1, $f2, $f3, $f4) = explode(':', $line);
					$arr[$f3] = $line;
				}
			}
		}
		ksort($arr);
		reset($arr);
		if($shadow_datei != '/etc/shadow'){
			$app->file->wf($group_datei, $app->file->remove_blank_lines(implode("\n", $arr), 0)."\n");
		}else {
			$app->file->wf($group_datei, $app->file->remove_blank_lines(implode("\n", $arr), 0));
		}
		unset($arr);

		$users = $app->file->no_comments($user_datei);
		$lines = explode("\n", $users);
		if(is_array($lines)){
			foreach($lines as $line){
				if(trim($line) != ""){
					list($f1, $f2, $f3, ) = explode(':', $line);
					if($f1 != 'toor'){
						$arr[$f3] = $line;
					} else {
						$arr[70000] = $line;
					}
				}
			}
		}
		ksort($arr);
		reset($arr);
		$app->file->wf($user_datei, $app->file->remove_blank_lines(implode("\n", $arr), 0));
		unset($arr);

		$passwds = $app->file->no_comments($shadow_datei);
		$lines = explode("\n", $passwds);
		if(is_array($lines)){
			foreach($lines as $line){
				if(trim($line) != ''){
					list($f1, $f2, $f3, ) = explode(':', $line);
					if($f1 != 'toor'){
						$uid = $this->getuid($f1);
						if(!is_bool($uid)) $arr[$uid] = $line;
					} else {
						$arr[70000] = $line;
					}
				}
			}
		}
		ksort($arr);
		reset($arr);
		$app->file->wf($shadow_datei, $app->file->remove_blank_lines(implode("\n", $arr), 0));
		unset($arr);
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	}
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	/**
	 * Find a user / group id
	 *
	 */
	function find_uid_gid($min, $max){
		global $app;
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		if($min < $max && $min >= 0 && $max >= 0 && $min <= 65536 && $max <= 65536 && is_int($min) && is_int($max)){
			for($i=$min;$i<=$max;$i++){
				$uid_arr[$i] = $gid_arr[$i] = 1;
			}
			$user_datei = $this->server_conf['passwd_datei'];
			$group_datei = $this->server_conf['group_datei'];

			$users = $app->file->no_comments($user_datei);
			$lines = explode("\n", $users);
			if(is_array($lines)){
				foreach($lines as $line){
					if(trim($line) != ''){
						list($f1, $f2, $f3, $f4, $f5, $f6, $f7) = explode(':', $line);
						if($f3 >= $min && $f3 <= $max) unset($uid_arr[$f3]);
					}
				}
				if(!empty($uid_arr)){
					foreach($uid_arr as $key => $val){
						$uids[] = $key;
					}
					$min_uid = min($uids);
					unset($uid_arr);
				} else {
					return false;
				}
			}

			$groups = $app->file->no_comments($group_datei);
			$lines = explode("\n", $groups);
			if(is_array($lines)){
				foreach($lines as $line){
					if(trim($line) != ''){
						list($f1, $f2, $f3, $f4) = explode(':', $line);
						if($f3 >= $min && $f3 <= $max) unset($gid_arr[$f3]);
					}
				}
				if(!empty($gid_arr)){
					foreach($gid_arr as $key => $val){
						$gids[] = $key;
					}
					$min_gid = min($gids);
					unset($gid_arr);
				} else {
					return false;
				}
			}

			$result = array_intersect($uids, $gids);
			$new_id = (max($result));
			unset($uids);
			unset($gids);
			unset($result);
			if($new_id <= $max){
				return $new_id;
			} else {
				return false;
			}
		} else {
			return false;
		}
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	}
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	/**
	 * Check if the users is really a user into the system
	 *
	 */
	function is_user($user){
		global $app;
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		$user_datei = $this->server_conf['passwd_datei'];
		$users = $app->file->no_comments($user_datei);
		$lines = explode("\n", $users);
		if(is_array($lines)){
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			foreach($lines as $line){
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				if(trim($line) != ''){
					list($f1, $f2, $f3, $f4, $f5, $f6, $f7) = explode(':', $line);
					if($f1 == $user) return true;
				}
			}
		}
		return false;
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	}
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	/**
	 * Check if the group is on this system
	 *
	 */
	function is_group($group){
		global $app;
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		$group_datei = $this->server_conf['group_datei'];
		$groups = $app->file->no_comments($group_datei);
		$lines = explode("\n", $groups);
		if(is_array($lines)){
			foreach($lines as $line){
				if(trim($line) != ""){
					list($f1, $f2, $f3, $f4) = explode(':', $line);
					if($f1 == $group) return true;
				}
			}
		}
		return false;
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	}
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	/*
	// Alternative implementation of the is_group function. Should be faster then the old one To be tested.
	function is_group($group) {
	$groupfile = '/etc/group';
	if(is_file($groupfile)) {
		$handle = fopen ($groupfile, "r");
		while (!feof($handle)) {
			$line = trim(fgets($handle, 4096));
			if($line != ""){
				$parts = explode(":", $line);
	        	if($parts[0] == $group) {
					fclose ($handle);
					return true;
				}
			}
		}
		fclose ($handle);
	}
	return false;
	}
	*/
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	function root_group(){
		global $app;
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		$group_datei = $this->server_conf['group_datei'];
		$groups = $app->file->no_comments($group_datei);
		$lines = explode("\n", $groups);
		if(is_array($lines)){
			foreach($lines as $line){
				if(trim($line) != ''){
					list($f1, $f2, $f3, $f4) = explode(':', $line);
					if($f3 == 0) return $f1;
				}
			}
		}
		return false;
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	}
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	/**
	 * Get the groups of an user
	 *
	 */
	function get_user_groups($username){
		global $app;
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		$user_groups = array();
		$group_datei = $this->server_conf['group_datei'];
		$groups = $app->file->no_comments($group_datei);
		$lines = explode("\n", $groups);
		if(is_array($lines)){
			foreach($lines as $line){
				if(trim($line) != ''){
					list($f1, $f2, $f3, $f4) = explode(':', $line);
					if(intval($f3) < intval($this->server_conf['groupid_von']) && trim($f1) != 'users'){
						$tmp_group_users = explode(',', str_replace(' ', '', $f4));
						if(in_array($username, $tmp_group_users) && trim($f1) != '') $user_groups[] = $f1;
						unset($tmp_group_users);
					}
				}
			}
		}
		if(!empty($user_groups)) return implode(',', $user_groups);
		return '';
580
	}
581
582
583
584
585





586
587
588
589
590
591
	/**
	 * Get a user password
	 *
	 */
	function getpasswd($user){
		global $app;
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
		if($this->is_user($user)){
			$shadow_datei = $this->server_conf['shadow_datei'];
			$passwds = $app->file->no_comments($shadow_datei);
			$lines = explode("\n", $passwds);
			if(is_array($lines)){
				foreach($lines as $line){
					if(trim($line) != ''){
						list($f1, $f2, ) = explode(':', $line);
						if($f1 == $user) return $f2;
					}
				}
			}
		} else {
			return false;
		}
607
	}
608
609
610
611
612





613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
	/**
	 * Get the user from an user id
	 *
	 */
	function getuser($uid){
		global $app;
		$user_datei = $this->server_conf['passwd_datei'];
		$users = $app->file->no_comments($user_datei);
		$lines = explode("\n", $users);
		if(is_array($lines)){
			foreach($lines as $line){
				if(trim($line) != ''){
					list($f1, $f2, $f3,) = explode(':', $line);
					if($f3 == $uid) return $f1;
				}
			}
		}
		return false;
	}





637
638
639
640
641
642
	/**
	 * Get the user id from an user
	 *
	 */
	function getuid($user){
		global $app;
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
		if($this->is_user($user)){
			$user_datei = $this->server_conf['passwd_datei'];
			$users = $app->file->no_comments($user_datei);
			$lines = explode("\n", $users);
			if(is_array($lines)){
				foreach($lines as $line){
					if(trim($line) != ''){
						list($f1, $f2, $f3, ) = explode(':', $line);
						if($f1 == $user) return $f3;
					}
				}
			}
		} else {
			return false;
		}
658
	}
659
660
661
662
663





664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
	/**
	 * Get the group from a group id
	 *
	 */
	function getgroup($gid){
		global $app;
		$group_datei = $this->server_conf['group_datei'];
		$groups = $app->file->no_comments($group_datei);
		$lines = explode("\n", $groups);
		if(is_array($lines)){
			foreach($lines as $line){
				if(trim($line) != ""){
					list($f1, $f2, $f3, $f4) = explode(':', $line);
					if($f3 == $gid) return $f1;
				}
			}
		}
		return false;
	}





688
689
690
691
692
693
	/**
	 * Get the group id from an group
	 *
	 */
	function getgid($group){
		global $app;
694
695
		if($this->is_group($group)){
			$group_datei = $this->server_conf['group_datei'];
696
697
698
			$groups = $app->file->no_comments($group_datei);
			$lines = explode("\n", $groups);
			if(is_array($lines)){
699
				foreach($lines as $line){
700
701
702
703
704
705
					if(trim($line) != ""){
						list($f1, $f2, $f3, $f4) = explode(':', $line);
						if($f1 == $group) return $f3;
					}
				}
			}
706
707
708
		} else {
			return false;
		}
709
	}
710
711
712
713
714





715
	/**
716
717
718
	 * Return info about a group by name
	 *
	 */
719
720
721
	function posix_getgrnam($group) {
		if(!function_exists('posix_getgrnam')){
			$group_datei = $this->server_conf['group_datei'];
722
723
724
725
			$cmd = 'grep -m 1 ? ?';
			$this->exec_safe($cmd, '^'.$group.':', $group_datei);
			$output = $this->last_exec_out();
			$return_var = $this->last_exec_retcode();
726
727
728
729
730
731
732
733
734
735
			if($return_var != 0 || !$output[0]) return false;
			list($f1, $f2, $f3, $f4) = explode(':', $output[0]);
			$f2 = trim($f2);
			$f3 = trim($f3);
			$f4 = trim($f4);
			if($f4 != ''){
				$members = explode(',', $f4);
			} else {
				$members = array();
			}
736
737
738
739
740
			$group_details = array( 'name' => $group,
				'passwd' => $f2,
				'members' => $members,
				'gid' => $f3);
			return $group_details;
741
742
743
		} else {
			return posix_getgrnam($group);
		}
744
745
746
747
748
749
	}





750
751
752
753
754
755
	/**
	 * Get all information from a user
	 *
	 */
	function get_user_attributes($user){
		global $app;
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
		if($this->is_user($user)){
			$user_datei = $this->server_conf['passwd_datei'];
			$users = $app->file->no_comments($user_datei);
			$lines = explode("\n", $users);
			if(is_array($lines)){
				foreach($lines as $line){
					if(trim($line) != ''){
						list($f1, $f2, $f3, $f4, $f5, $f6, $f7) = explode(':', $line);
						if($f1 == $user){
							$user_attr['username'] = $f1;
							$user_attr['x'] = $f2;
							$user_attr['uid'] = $f3;
							$user_attr['gid'] = $f4;
							$user_attr['name'] = $f5;
							$user_attr['homedir'] = $f6;
							$user_attr['shell'] = $f7;
							return $user_attr;
						}
					}
				}
			}
		} else {
			return false;
		}
780
	}
781
782
783
784
785





786
787
788
789
	/**
	 * Edit the owner of a file
	 *
	 */
790
	function chown($file, $owner, $allow_symlink = false){
791
792
793
		global $app;
		if($allow_symlink == false && $this->checkpath($file) == false) {
			$app->log("Action aborted, file is a symlink: $file", LOGLEVEL_WARN);
794
795
			return false;
		}
796
797
798
799
800
801
802
803
		if(file_exists($file)) {
			if(@chown($file, $owner)) {
				return true;
			} else {
				$app->log("chown failed: $file : $owner", LOGLEVEL_DEBUG);
				return false;
			}
		}
804
	}
805

806
	function chgrp($file, $group = '', $allow_symlink = false){
807
808
809
		global $app;
		if($allow_symlink == false && $this->checkpath($file) == false) {
			$app->log("Action aborted, file is a symlink: $file", LOGLEVEL_WARN);
810
811
			return false;
		}
812
813
814
815
816
817
818
819
		if(file_exists($file)) {
			if(@chgrp($file, $group)) {
				return true;
			} else {
				$app->log("chgrp failed: $file : $group", LOGLEVEL_DEBUG);
				return false;
			}
		}
820
	}
821

822
823
	//* Change the mode of a file
	function chmod($file, $mode, $allow_symlink = false) {
824
		global $app;
825
		if($allow_symlink == false && $this->checkpath($file) == false) {
826
			$app->log("Action aborted, file is a symlink: $file", LOGLEVEL_WARN);
827
828
			return false;
		}
829
830
831
		if(@chmod($file, $mode)) {
			return true;
		} else {
832
			$app->log("chmod failed: $file : $mode", LOGLEVEL_DEBUG);
833
834
			return false;
		}
835
	}
836

837
	function file_put_contents($filename, $data, $allow_symlink = false) {
838
		global $app;
839
		if($allow_symlink == false && $this->checkpath($filename) == false) {
840
			$app->log("Action aborted, file is a symlink: $filename", LOGLEVEL_WARN);
841
842
			return false;
		}
843
		if(file_exists($filename)) unlink($filename);
844
845
		return file_put_contents($filename, $data);
	}
846

847
	function file_get_contents($filename, $allow_symlink = false) {
848
		global $app;
849
		if($allow_symlink == false && $this->checkpath($filename) == false) {
850
			$app->log("Action aborted, file is a symlink: $filename", LOGLEVEL_WARN);
851
852
			return false;
		}
853
		return file_get_contents($filename, $data);
854
	}
855

856
	function rename($filename, $new_filename, $allow_symlink = false) {
857
		global $app;
858
		if($allow_symlink == false && $this->checkpath($filename) == false) {
859
			$app->log("Action aborted, file is a symlink: $filename", LOGLEVEL_WARN);
860
861
862
863
			return false;
		}
		return rename($filename, $new_filename);
	}
864

865
	function mkdir($dirname, $allow_symlink = false, $mode = 0777, $recursive = false) {
866
		global $app;
867
		if($allow_symlink == false && $this->checkpath($dirname) == false) {
868
			$app->log("Action aborted, file is a symlink: $dirname", LOGLEVEL_WARN);
869
870
			return false;
		}
871
		if(@mkdir($dirname, $mode, $recursive)) {
872
873
			return true;
		} else {
874
			$app->log("mkdir failed: $dirname", LOGLEVEL_DEBUG);
875
876
			return false;
		}
877
	}
878

879
	function unlink($filename) {
880
		if(file_exists($filename) || is_link($filename)) {
881
882
			return unlink($filename);
		}
883
	}
884
885
886

	function copy($file1, $file2) {
		return copy($file1, $file2);
887
	}
888

889
	function touch($file, $allow_symlink = false){
890
891
892
893
894
		global $app;
		if($allow_symlink == false && @file_exists($file) && $this->checkpath($file) == false) {
			$this->unlink($file);
		}
		if(@touch($file)) {
895
			return true;
896
897
		} else {
			$app->log("touch failed: $file", LOGLEVEL_DEBUG);
898
			return false;
899
		}
900
	}
901

902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
	public function create_relative_link($f, $t) {
		global $app;

		// $from already exists
		$from = realpath($f);

		// realpath requires the traced file to exist - so, lets touch it first, then remove
		@$app->system->unlink($t); touch($t);
		$to = realpath($t);
		@$app->system->unlink($t);

		// Remove from the left side matching path elements from $from and $to
		// and get path elements counts
		$a1 = explode('/', $from); $a2 = explode('/', $to);
		for ($c = 0; $a1[$c] == $a2[$c]; $c++) {
			unset($a1[$c]); unset($a2[$c]);
		}
		$cfrom = implode('/', $a1);

		// Check if a path is fully a subpath of another - no way to create symlink in the case
		if (count($a1) == 0 || count($a2) == 0) return false;

		// Add ($cnt_to-1) number of "../" elements to left side of $cfrom
		for ($c = 0; $c < (count($a2)-1); $c++) { $cfrom = '../'.$cfrom; }
926
		//if(strstr($to,'/etc/letsencrypt/archive/')) $to = str_replace('/etc/letsencrypt/archive/','/etc/letsencrypt/live/',$to);
927
928
929
930

		return symlink($cfrom, $to);
	}

931
932
933
	function checkpath($path) {
		$path = trim($path);
		//* We allow only absolute paths
934
935
		if(substr($path, 0, 1) != '/') return false;

936
		//* We allow only some characters in the path
937
		// * is allowed, for example it is part of wildcard certificates/keys: *.example.com.crt
938
		if(!preg_match('@^/[-a-zA-Z0-9_/.*]{1,}[~]?$@', $path)) return false;
939

940
		//* Check path for symlinks
941
		$path_parts = explode('/', $path);
942
943
944
945
946
		$testpath = '';
		foreach($path_parts as $p) {
			$testpath .= '/'.$p;
			if(is_link($testpath)) return false;
		}
947

948
		return true;
949
	}
950
951


952
953
954
955
	/**
	 * This function checks the free space for a given directory
	 * @param path check path
	 * @param limit min. free space in bytes
956
	 * @return bool - true when the the free space is above limit ohterwise false, opt. available disk-space
957
958
	*/

959
	function check_free_space($path, $limit = 0, &$free_space = 0) {
960
961
962
963
964
965
966
967
		$path = rtrim($path, '/');

		/**
		* Make sure that we have only existing directories in the path.

		* Given a file name instead of a directory, the behaviour of the disk_free_space
		function is unspecified and may differ between operating systems and PHP versions.
        */
968
		while(!is_dir($path) && $path != '/') $path = realpath(dirname($path));
969

970
		$free_space = disk_free_space($out);
971

972
973
974
975
		if (!$free_space) {
			$free_space = 0;
			return false;
		}
976

977
		if ($free_space >= $limit) {
978
979
980
981
982
983
			return true;
		} else {
			return false;
		}

	}
984
985
986



987
988
989
990
991
992
	/**
	 * Add an user to a specific group
	 *
	 */
	function add_user_to_group($group, $user = 'admispconfig'){
		global $app;
993
994
995
996
997
998
999
1000
		$group_file = $app->file->rf($this->server_conf['group_datei']);
		$group_file_lines = explode("\n", $group_file);
		foreach($group_file_lines as $group_file_line){
			list($group_name, $group_x, $group_id, $group_users) = explode(':', $group_file_line);
			if($group_name == $group){
				$group_users = explode(',', str_replace(' ', '', $group_users));
				if(!in_array($user, $group_users)){
					$group_users[] = $user;
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