<?php
  /**************************************************************************\
  * phpGroupWare - Setup Check Installation                                  *
  * http://www.eGroupWare.org                                                *
  * --------------------------------------------                             *
  *  This program is free software; you can redistribute it and/or modify it *
  *  under the terms of the GNU General Public License as published by the   *
  *  Free Software Foundation; either version 2 of the License, or (at your  *
  *  option) any later version.                                              *
  \**************************************************************************/

  /* $Id$ */

$run_by_webserver = !!$_SERVER['PHP_SELF'];

if ($run_by_webserver)
{
	$phpgw_info = array();
	$GLOBALS['phpgw_info']['flags'] = array(
		'noheader' => True,
		'nonavbar' => True,
		'currentapp' => 'home',
		'noapi' => True
	);
	include ('./inc/functions.inc.php');

	$GLOBALS['phpgw_info']['setup']['stage']['header'] = $GLOBALS['phpgw_setup']->detection->check_header();
	if ($GLOBALS['phpgw_info']['setup']['stage']['header'] == '10')
	{
		// Check header and authentication
		if (!$GLOBALS['phpgw_setup']->auth('Config'))
		{
			Header('Location: index.php');
			exit;
		}
	}
}

$checks = array(
	'safe_mode' => array(
		'func' => 'php_ini_check',
		'value' => 0,
		'verbose_value' => 'Off',
		'warning' => 'safe_mode is turned on, which is generaly a good thing as it makes your install more secure.
If safe_mode is turned on, eGW is not able to change certain settings on runtime, nor can we load any not yet loaded module.
*** You have to do the changes manualy in your php.ini (usualy in /etc on linux) in order to get eGW fully working !!!
*** Do NOT update your database via setup, as the update might be interrupted by the max_execution_time, which leaves your DB in an unrecoverable state (your data is lost) !!!'
	),
	'error_reporting' => array(
		'func' => 'php_ini_check',
		'value' => E_NOTICE,
		'verbose_value' => 'E_NOTICE',
		'check' => 'not set',
		'safe_mode' => 'error_reporting = E_ALL & ~E_NOTICE'
	),
	'magic_quotes_runtime' => array(
		'func' => 'php_ini_check',
		'value' => 0,
		'verbose_value' => 'Off',
		'safe_mode' => 'magic_qoutes_runtime = Off'
	),
	'register_globals' => array(
		'func' => 'php_ini_check',
		'value' => 0,
		'verbose_value' => 'Off',
		'warning' => "register_globals is turned on, eGroupWare does NOT require it and it's generaly more secure to have it turned Off"
	),
	'memory_limit' => array(
		'func' => 'php_ini_check',
		'value' => '16M',
		'check' => '>=',
		'warning' => 'memory_limit is set to less then 16M: some applications of eGroupWare need more then the recommend 8M, expect ocasional failures',
		'safe_mode' => 'memory_limit = 16M'
	),
	'max_execution_time' => array(
		'func' => 'php_ini_check',
		'value' => 30,
		'check' => '>=',
		'warning' => 'max_execution_time is set to less then 30 (seconds): eGroupWare sometimes need a higher execution_time, expect ocasional failures',
		'safe_mode' => 'max_execution_time = 30'
	),
	'mysql' => array(
		'func' => 'extension_check',
		'warning' => 'The mysql extension is needed, if you plan to use a MySQL database.'
	),
	'pgsql' => array(
		'func' => 'extension_check',
		'warning' => 'The pgsql extension is needed, if you plan to use a pgSQL database.'
	),
	'mssql' => array(
		'func' => 'extension_check',
		'warning' => 'The mssql extension is needed, if you plan to use a MsSQL database.',
		'win_only' => True
	),
	'mbstring' => array(
		'func' => 'extension_check',
		'warning' => 'The mbstring extension is needed to fully support unicode (utf-8) or other multibyte-charsets.'
	),
	'.' => array(
		'func' => 'permission_check',
		'is_world_writable' => False,
		'recursiv' => True
	),
	'header.inc.php' => array(
		'func' => 'permission_check',
		'is_world_readable' => False,
		'only_if_exists' => $GLOBALS['phpgw_info']['setup']['stage']['header'] != 10
	),
	'phpgwapi/images' => array(
		'func' => 'permission_check',
		'is_writable' => True
	),
);

// some constanst for pre php4.3
if (!defined('PHP_SHLIB_SUFFIX'))
{
	define('PHP_SHLIB_SUFFIX',strtoupper(substr(PHP_OS, 0,3)) == 'WIN' ? 'dll' : 'so');
}
if (!defined('PHP_SHLIB_PREFIX'))
{
	define('PHP_SHLIB_PREFIX',PHP_SHLIB_SUFFIX == 'dll' ? 'php_' : '');
}

function extension_check($name,$args)
{
	$is_win = strtoupper(substr(PHP_OS,0,3)) == 'WIN';

	if (isset($args['win_only']) && $args['win_only'] && !$is_win)
	{
		return True;	// check only under windows
	}
	$availible = extension_loaded($name) || dl(PHP_SHLIB_PREFIX.$name.'.'.PHP_SHLIB_SUFFIX);

	echo "Checking extension $name is loaded or loadable: ".($availible ? 'True' : 'False')."\n";

	if (!$availible)
	{
		echo $args['warning']."\n";
	}
	return $availible;
}

function verbosePerms( $in_Perms )
{
	$sP;

	if($in_Perms & 0x1000)     // FIFO pipe
	$sP = 'p';
	elseif($in_Perms & 0x2000) // Character special
	$sP = 'c';
	elseif($in_Perms & 0x4000) // Directory
	$sP = 'd';
	elseif($in_Perms & 0x6000) // Block special
	$sP = 'b';
	elseif($in_Perms & 0x8000) // Regular
	$sP = '-';
	elseif($in_Perms & 0xA000) // Symbolic Link
	$sP = 'l';
	elseif($in_Perms & 0xC000) // Socket
	$sP = 's';
	else                         // UNKNOWN
	$sP = 'u';

	// owner
	$sP .= (($in_Perms & 0x0100) ? 'r' : '-') .
		(($in_Perms & 0x0080) ? 'w' : '-') .
		(($in_Perms & 0x0040) ? (($in_Perms & 0x0800) ? 's' : 'x' ) :
									(($in_Perms & 0x0800) ? 'S' : '-'));

	// group
	$sP .= (($in_Perms & 0x0020) ? 'r' : '-') .
		(($in_Perms & 0x0010) ? 'w' : '-') .
		(($in_Perms & 0x0008) ? (($in_Perms & 0x0400) ? 's' : 'x' ) :
									(($in_Perms & 0x0400) ? 'S' : '-'));

	// world
	$sP .= (($in_Perms & 0x0004) ? 'r' : '-') .
			(($in_Perms & 0x0002) ? 'w' : '-') .
			(($in_Perms & 0x0001) ? (($in_Perms & 0x0200) ? 't' : 'x' ) :
								(($in_Perms & 0x0200) ? 'T' : '-'));
	return $sP;
}

function permission_check($name,$args,$verbose=True)
{
	//echo "<p>permision_check('$name',".print_r($args,True).",'$verbose')</p>\n";

	if (substr($name,0,3) != '../')
	{
		$name = '../'.$name;
	}
	$rel_name = substr($name,3);

	// dont know how much of this is working on windows
	if (!file_exists($name) && isset($args['only_if_exists']) && $args['only_if_exists'])
	{
		return True;
	}

	if ($verbose)
	{
		$owner = posix_getpwuid(fileowner($name));
		$group = posix_getgrgid(filegroup($name));

		$checks = array();
		if (isset($args['is_writable'])) $checks[] = (!$args['is_writable']?'not ':'').'writable by webserver';
		if (isset($args['is_world_readable'])) $checks[] = (!$args['is_world_readable']?'not ':'').'world readable';
		if (isset($args['is_world_writable'])) $checks[] = (!$args['is_world_writable']?'not ':'').'world writable';
		$checks = implode(', ',$checks);

		echo "Checking file-permissions of $rel_name for $checks: $owner[name]/$group[name] ".verbosePerms(fileperms($name))."\n";
	}
	if (!file_exists($name))
	{
		echo "*** $rel_name does not exist !!!\n";
		return False;
	}
	if (!$GLOBALS['run_by_webserver'] && ($args['is_readable'] || $args['is_writable']))
	{
		echo "*** check can only be performed, if called via a webserver, as the user-id/-name of the webserver is not known.\n";
		unset($args['is_readable']);
		unset($args['is_writable']);
	}
	$Ok = True;
	if (isset($args['is_writable']) && is_writable($name) != $args['is_writable'])
	{
		echo "*** $rel_name ".($args['is_writable']?'not ':'')."writable by the webserver !!!\n";
		$Ok = False;
	}
	if (isset($args['is_readable']) && is_readable($name) != $args['is_readable'])
	{
		echo "*** $rel_name ".($args['is_readable']?'not ':'')."readable by the webserver !!!\n";
		$Ok = False;
	}
	if (isset($args['is_world_readable']) && !(fileperms($name) & 04) == $args['is_world_readable'])
	{
		echo "*** $rel_name ".($args['is_world_readable']?'not ':'')."world-readable !!!\n";
		$Ok = False;
	}
	if (isset($args['is_world_writable']) && !(fileperms($name) & 02) == $args['is_world_writable'])
	{
		echo "*** $rel_name ".($args['is_world_writable']?'not ':'')."world-writable !!!\n";
		$Ok = False;
	}
	if ($Ok && $args['recursiv'] && is_dir($name))
	{
		$handle = @opendir($name);
		while($handle && ($file = readdir($handle)))
		{
			if ($file != '.' && $file != '..')
			{
				$Ok = $Ok && permission_check(($name!='.'?$name.'/':'').$file,$args,False);
			}
		}
		if ($handle) closedir($handle);
	}
	return $Ok;
}

function php_ini_check($name,$args)
{
	$safe_mode = ini_get('safe_mode');

	$ini_value = ini_get($name);
	$check = isset($args['check']) ? $args['check'] : '=';
	$verbose_value = isset($args['verbose_value']) ? $args['verbose_value'] : $args['value'];
	echo "Checking php.ini: $name $check $verbose_value: ini_get('$name')='$ini_value'\n";
	switch ($check)
	{
		case 'not set':
			$result = !($ini_value & $args['value']);
			break;
		case 'set':
			$result = !!($ini_value & $args['value']);
			break;
		case '>=':
			$result = intval($ini_value) >= intval($args['value']) &&
				($args['value'] == intval($args['value']) ||
				substr($args['value'],-1) == substr($ini_value,-1));
			break;
		case '=':
		default:
			$result = $ini_value == $args['value'];
			break;
	}
	if (!$result)
	{
		if (isset($args['warning']))
		{
			echo $args['warning']."\n";
		}
		if (isset($args['safe_mode']) && $safe_mode)
		{
			echo "*** Please make the following change in your php.ini:\n$args[safe_mode]\n";
		}
		return False;
	}
	return True;
}

if ($run_by_webserver)
{
	//echo "<html>\n<header>\n<title>Checking the eGroupWare install</title>\n</header>\n<body>\n";
	$tpl_root = $GLOBALS['phpgw_setup']->html->setup_tpl_dir('setup');
	$setup_tpl = CreateObject('setup.Template',$tpl_root);
	$setup_tpl->set_file(array(
		'T_head' => 'head.tpl',
		'T_footer' => 'footer.tpl',
	));
	$ConfigDomain = get_var('ConfigDomain',Array('POST','COOKIE'));
	$GLOBALS['phpgw_setup']->html->show_header(lang('Checking the eGroupWare Installation'),False,'config',$ConfigDomain . '(' . $phpgw_domain[$ConfigDomain]['db_type'] . ')');
	echo '<h1>'.lang('Checking the eGroupWare Installation')."</h1>\n";
	echo "<pre style=\"text-align: left;\">\n";;
}
else
{
	echo "Checking the eGroupWare Installation\n\n";
}

$Ok = True;
foreach ($checks as $name => $args)
{
	$check_ok = $args['func']($name,$args);
	$Ok = $Ok && $check_ok;
}

if ($run_by_webserver)
{
	echo "</pre>\n";;

	if ($GLOBALS['phpgw_info']['setup']['stage']['header'] != 10)
	{
		if (!$Ok)
		{
			echo '<h3>'.lang('Please fix the above errors (***) and %1continue to the Header Admin%2','<a href="manageheader.php">','</a>')."</h3>\n";
		}
		else
		{
			echo '<h3><a href="manageheader.php">'.lang('Continue to the Header Admin')."</a></h3>\n";
		}
	}
	else
	{
		echo '<h3><a href="index.php">'.lang('Return to Setup')."</a></h3>\n";
	}
	$setup_tpl->pparse('out','T_footer');
	//echo "</body>\n</html>\n";
}