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<?php
/**
* common Functions class
*
* PHP version 5
*
* @category PHP
* @package PSI
* @author Michael Cramer <BigMichi1@users.sourceforge.net>
* @copyright 2009 phpSysInfo
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License
* @version SVN: $Id: class.CommonFunctions.inc.php 699 2012-09-15 11:57:13Z namiltd $
* @link http://phpsysinfo.sourceforge.net
*/
/**
* class with common functions used in all places
*
* @category PHP
* @package PSI
* @author Michael Cramer <BigMichi1@users.sourceforge.net>
* @copyright 2009 phpSysInfo
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License
* @version Release: 3.0
* @link http://phpsysinfo.sourceforge.net
*/
class CommonFunctions
{
private static function _parse_log_file($string)
{
if (defined('PSI_LOG') && is_string(PSI_LOG) && (strlen(PSI_LOG)>0) && ((substr(PSI_LOG, 0, 1)=="-") || (substr(PSI_LOG, 0, 1)=="+"))) {
$log_file = substr(PSI_LOG, 1);
if (file_exists($log_file)) {
$contents = @file_get_contents($log_file);
if ($contents && preg_match("/^\-\-\-[^-\n]+\-\-\- ".preg_quote($string, '/')."\n/m", $contents, $matches, PREG_OFFSET_CAPTURE)) {
$findIndex = $matches[0][1];
if (preg_match("/\n/m", $contents, $matches, PREG_OFFSET_CAPTURE, $findIndex)) {
$startIndex = $matches[0][1]+1;
if (preg_match("/^\-\-\-[^-\n]+\-\-\- /m", $contents, $matches, PREG_OFFSET_CAPTURE, $startIndex)) {
$stopIndex = $matches[0][1];
return substr($contents, $startIndex, $stopIndex-$startIndex );
} else {
return substr($contents, $startIndex );
}
}
}
}
}
return false;
}
/**
* Find a system program, do also path checking when not running on WINNT
* on WINNT we simply return the name with the exe extension to the program name
*
* @param string $strProgram name of the program
*
* @return string complete path and name of the program
*/
private static function _findProgram($strProgram)
{
$path_parts = pathinfo($strProgram);
if (empty($path_parts['basename'])) {
return;
}
$arrPath = array();
if ((PSI_OS == 'WINNT') && empty($path_parts['extension'])) {
$strProgram .= '.exe';
$path_parts = pathinfo($strProgram);
}
if (empty($path_parts['dirname']) || ($path_parts['dirname'] == '.')) {
if (PSI_OS == 'WINNT') {
$arrPath = preg_split('/;/', getenv("Path"), -1, PREG_SPLIT_NO_EMPTY);
} else {
$arrPath = preg_split('/:/', getenv("PATH"), -1, PREG_SPLIT_NO_EMPTY);
}
} else {
array_push($arrPath, $path_parts['dirname']);
$strProgram = $path_parts['basename'];
}
if ( defined('PSI_ADD_PATHS') && is_string(PSI_ADD_PATHS) ) {
if (preg_match(ARRAY_EXP, PSI_ADD_PATHS)) {
$arrPath = array_merge(eval(PSI_ADD_PATHS), $arrPath); // In this order so $addpaths is before $arrPath when looking for a program
} else {
$arrPath = array_merge(array(PSI_ADD_PATHS), $arrPath); // In this order so $addpaths is before $arrPath when looking for a program
}
}
//add some default paths if we still have no paths here
if (empty($arrPath) && PSI_OS != 'WINNT') {
if (PSI_OS == 'Android') {
array_push($arrPath, '/system/bin');
} else {
array_push($arrPath, '/bin', '/sbin', '/usr/bin', '/usr/sbin', '/usr/local/bin', '/usr/local/sbin');
}
}
// If open_basedir defined, fill the $open_basedir array with authorized paths,. (Not tested when no open_basedir restriction)
if ((bool) ini_get('open_basedir')) {
if (PSI_OS == 'WINNT') {
$open_basedir = preg_split('/;/', ini_get('open_basedir'), -1, PREG_SPLIT_NO_EMPTY);
} else {
$open_basedir = preg_split('/:/', ini_get('open_basedir'), -1, PREG_SPLIT_NO_EMPTY);
}
}
foreach ($arrPath as $strPath) {
// Path with trailing slash
if (PSI_OS == 'WINNT') {
$strPathS = rtrim($strPath,"\\")."\\";
} else {
$strPathS = rtrim($strPath,"/")."/";
}
if (!((PSI_OS == 'Android') && ($strPath=='/system/bin')) //is_dir('/system/bin') Android patch
&& !is_dir($strPath)) {
continue;
}
// To avoid "open_basedir restriction in effect" error when testing paths if restriction is enabled
if (isset($open_basedir)) {
$inBaseDir = false;
if (PSI_OS == 'WINNT') {
foreach ($open_basedir as $openbasedir) {
if (substr($openbasedir,-1)=="\\") {
$str_Path = $strPathS;
} else {
$str_Path = $strPath;
}
if (stripos($str_Path, $openbasedir) === 0) {
$inBaseDir = true;
break;
}
}
} else {
foreach ($open_basedir as $openbasedir) {
if (substr($openbasedir,-1)=="/") {
$str_Path = $strPathS;
} else {
$str_Path = $strPath;
}
if (strpos($str_Path, $openbasedir) === 0) {
$inBaseDir = true;
break;
}
}
}
if ($inBaseDir == false) {
continue;
}
}
if (PSI_OS == 'WINNT') {
$strProgrammpath = rtrim($strPath,"\\")."\\".$strProgram;
} else {
$strProgrammpath = rtrim($strPath,"/")."/".$strProgram;
}
if (is_executable($strProgrammpath)) {
return $strProgrammpath;
}
}
}
/**
* Execute a system program. return a trim()'d result.
* does very crude pipe checking. you need ' | ' for it to work
* ie $program = CommonFunctions::executeProgram('netstat', '-anp | grep LIST');
* NOT $program = CommonFunctions::executeProgram('netstat', '-anp|grep LIST');
*
* @param string $strProgramname name of the program
* @param string $strArgs arguments to the program
* @param string &$strBuffer output of the command
* @param boolean $booErrorRep en- or disables the reporting of errors which should be logged
*
* @return boolean command successfull or not
*/
public static function executeProgram($strProgramname, $strArgs, &$strBuffer, $booErrorRep = true)
{
if (defined('PSI_LOG') && is_string(PSI_LOG) && (strlen(PSI_LOG)>0) && ((substr(PSI_LOG, 0, 1)=="-") || (substr(PSI_LOG, 0, 1)=="+"))) {
$out = self::_parse_log_file("Executing: ".trim($strProgramname.' '.$strArgs));
if ($out == false) {
if (substr(PSI_LOG, 0, 1)=="-") {
$strBuffer = '';
return false;
}
} else {
$strBuffer = $out;
return true;
}
}
$strBuffer = '';
$strError = '';
$pipes = array();
$strProgram = self::_findProgram($strProgramname);
$error = Error::singleton();
if (!$strProgram) {
if ($booErrorRep) {
$error->addError('find_program('.$strProgramname.')', 'program not found on the machine');
}
return false;
}
// see if we've gotten a |, if we have we need to do path checking on the cmd
if ($strArgs) {
$arrArgs = preg_split('/ /', $strArgs, -1, PREG_SPLIT_NO_EMPTY);
for ($i = 0, $cnt_args = count($arrArgs); $i < $cnt_args; $i++) {
if ($arrArgs[$i] == '|') {
$strCmd = $arrArgs[$i + 1];
$strNewcmd = self::_findProgram($strCmd);
$strArgs = preg_replace("/\| ".$strCmd.'/', "| ".$strNewcmd, $strArgs);
}
}
}
$descriptorspec = array(0=>array("pipe", "r"), 1=>array("pipe", "w"), 2=>array("pipe", "w"));
if (defined("PSI_MODE_POPEN") && PSI_MODE_POPEN === true) {
$process = $pipes[1] = popen($strProgram." ".$strArgs." 2>/dev/null", "r");
} else {
$process = proc_open($strProgram." ".$strArgs, $descriptorspec, $pipes);
}
if (is_resource($process)) {
self::_timeoutfgets($pipes, $strBuffer, $strError);
if (defined("PSI_MODE_POPEN") && PSI_MODE_POPEN === true) {
$return_value = pclose($pipes[1]);
} else {
fclose($pipes[0]);
fclose($pipes[1]);
fclose($pipes[2]);
// It is important that you close any pipes before calling
// proc_close in order to avoid a deadlock
$return_value = proc_close($process);
}
} else {
if ($booErrorRep) {
$error->addError($strProgram, "\nOpen process error");
}
return false;
}
$strError = trim($strError);
$strBuffer = trim($strBuffer);
if (defined('PSI_LOG') && is_string(PSI_LOG) && (strlen(PSI_LOG)>0) && (substr(PSI_LOG, 0, 1)!="-") && (substr(PSI_LOG, 0, 1)!="+")) {
error_log("---".gmdate('r T')."--- Executing: ".trim($strProgramname.' '.$strArgs)."\n".$strBuffer."\n", 3, PSI_LOG);
}
if (! empty($strError)) {
if ($booErrorRep) {
$error->addError($strProgram, $strError."\nReturn value: ".$return_value);
}
return $return_value == 0;
}
return true;
}
/**
* read a file and return the content as a string
*
* @param string $strFileName name of the file which should be read
* @param string &$strRet content of the file (reference)
* @param integer $intLines control how many lines should be read
* @param integer $intBytes control how many bytes of each line should be read
* @param boolean $booErrorRep en- or disables the reporting of errors which should be logged
*
* @return boolean command successfull or not
*/
public static function rfts($strFileName, &$strRet, $intLines = 0, $intBytes = 4096, $booErrorRep = true)
{
if (defined('PSI_LOG') && is_string(PSI_LOG) && (strlen(PSI_LOG)>0) && ((substr(PSI_LOG, 0, 1)=="-") || (substr(PSI_LOG, 0, 1)=="+"))) {
$out = self::_parse_log_file("Reading: ".$strFileName);
if ($out == false) {
if (substr(PSI_LOG, 0, 1)=="-") {
$strRet = '';
return false;
}
} else {
$strRet = $out;
return true;
}
}
$strFile = "";
$intCurLine = 1;
$error = Error::singleton();
if (file_exists($strFileName)) {
if (is_readable($strFileName)) {
if ($fd = fopen($strFileName, 'r')) {
while (!feof($fd)) {
$strFile .= fgets($fd, $intBytes);
if ($intLines <= $intCurLine && $intLines != 0) {
break;
} else {
$intCurLine++;
}
}
fclose($fd);
$strRet = $strFile;
if (defined('PSI_LOG') && is_string(PSI_LOG) && (strlen(PSI_LOG)>0) && (substr(PSI_LOG, 0, 1)!="-") && (substr(PSI_LOG, 0, 1)!="+")) {
error_log("---".gmdate('r T')."--- Reading: ".$strFileName."\n".$strRet, 3, PSI_LOG);
}
} else {
if ($booErrorRep) {
$error->addError('fopen('.$strFileName.')', 'file can not read by phpsysinfo');
}
return false;
}
} else {
if ($booErrorRep) {
$error->addError('fopen('.$strFileName.')', 'file permission error');
}
return false;
}
} else {
if ($booErrorRep) {
$error->addError('file_exists('.$strFileName.')', 'the file does not exist on your machine');
}
return false;
}
return true;
}
/**
* file exists
*
* @param string $strFileName name of the file which should be check
*
* @return boolean command successfull or not
*/
public static function fileexists($strFileName)
{
if (defined('PSI_LOG') && is_string(PSI_LOG) && (strlen(PSI_LOG)>0) && ((substr(PSI_LOG, 0, 1)=="-") || (substr(PSI_LOG, 0, 1)=="+"))) {
$log_file = substr(PSI_LOG, 1);
if (file_exists($log_file)
&& ($contents = @file_get_contents($log_file))
&& preg_match("/^\-\-\-[^-\n]+\-\-\- ".preg_quote("Reading: ".$strFileName, '/')."\n/m", $contents)) {
return true;
} else {
if (substr(PSI_LOG, 0, 1)=="-") {
return false;
}
}
}
return file_exists($strFileName);
}
/**
* reads a directory and return the name of the files and directorys in it
*
* @param string $strPath path of the directory which should be read
* @param boolean $booErrorRep en- or disables the reporting of errors which should be logged
*
* @return array content of the directory excluding . and ..
*/
public static function gdc($strPath, $booErrorRep = true)
{
$arrDirectoryContent = array();
$error = Error::singleton();
if (is_dir($strPath)) {
if ($handle = opendir($strPath)) {
while (($strFile = readdir($handle)) !== false) {
if ($strFile != "." && $strFile != "..") {
$arrDirectoryContent[] = $strFile;
}
}
closedir($handle);
} else {
if ($booErrorRep) {
$error->addError('opendir('.$strPath.')', 'directory can not be read by phpsysinfo');
}
}
} else {
if ($booErrorRep) {
$error->addError('is_dir('.$strPath.')', 'directory does not exist on your machine');
}
}
return $arrDirectoryContent;
}
/**
* Check for needed php extensions
*
* We need that extensions for almost everything
* This function will return a hard coded
* XML string (with headers) if the SimpleXML extension isn't loaded.
* Then it will terminate the script.
* See bug #1787137
*
* @param array $arrExt additional extensions for which a check should run
*
* @return void
*/
public static function checkForExtensions($arrExt = array())
{
if ((strcasecmp(PSI_SYSTEM_CODEPAGE,"UTF-8") == 0) || (strcasecmp(PSI_SYSTEM_CODEPAGE,"CP437") == 0))
$arrReq = array('simplexml', 'pcre', 'xml', 'dom');
elseif (PSI_OS == "WINNT")
$arrReq = array('simplexml', 'pcre', 'xml', 'mbstring', 'dom', 'com_dotnet');
else
$arrReq = array('simplexml', 'pcre', 'xml', 'mbstring', 'dom');
$extensions = array_merge($arrExt, $arrReq);
$text = "";
$error = false;
$text .= "<?xml version='1.0'?>\n";
$text .= "<phpsysinfo>\n";
$text .= " <Error>\n";
foreach ($extensions as $extension) {
if (!extension_loaded($extension)) {
$text .= " <Function>checkForExtensions</Function>\n";
$text .= " <Message>phpSysInfo requires the ".$extension." extension to php in order to work properly.</Message>\n";
$error = true;
}
}
$text .= " </Error>\n";
$text .= "</phpsysinfo>";
if ($error) {
header("Content-Type: text/xml\n\n");
echo $text;
die();
}
}
/**
* get the content of stdout/stderr with the option to set a timeout for reading
*
* @param array $pipes array of file pointers for stdin, stdout, stderr (proc_open())
* @param string &$out target string for the output message (reference)
* @param string &$err target string for the error message (reference)
* @param integer $timeout timeout value in seconds (default value is 30)
*
* @return void
*/
private static function _timeoutfgets($pipes, &$out, &$err, $timeout = 30)
{
$w = NULL;
$e = NULL;
if (defined("PSI_MODE_POPEN") && PSI_MODE_POPEN === true) {
$pipe2 = false;
} else {
$pipe2 = true;
}
while (!(feof($pipes[1]) || ($pipe2 && feof($pipes[2])))) {
if ($pipe2) {
$read = array($pipes[1], $pipes[2]);
} else {
$read = array($pipes[1]);
}
$n = stream_select($read, $w, $e, $timeout);
if ($n === FALSE) {
error_log('stream_select: failed !');
break;
} elseif ($n === 0) {
error_log('stream_select: timeout expired !');
break;
}
foreach ($read as $r) {
if ($r == $pipes[1]) {
$out .= fread($r, 4096);
}
if ($pipe2 && ($r == $pipes[2])) {
$err .= fread($r, 4096);
}
}
}
}
/**
* function for getting a list of values in the specified context
* optionally filter this list, based on the list from third parameter
*
* @param $wmi holds the COM object that we pull the WMI data from
* @param string $strClass name of the class where the values are stored
* @param array $strValue filter out only needed values, if not set all values of the class are returned
*
* @return array content of the class stored in an array
*/
public static function getWMI($wmi, $strClass, $strValue = array())
{
$arrData = array();
if ($wmi) {
$value = "";
try {
$objWEBM = $wmi->Get($strClass);
$arrProp = $objWEBM->Properties_;
$arrWEBMCol = $objWEBM->Instances_();
foreach ($arrWEBMCol as $objItem) {
if (is_array($arrProp)) {
reset($arrProp);
}
$arrInstance = array();
foreach ($arrProp as $propItem) {
eval("\$value = \$objItem->".$propItem->Name.";");
if ( empty($strValue)) {
if (is_string($value)) $arrInstance[$propItem->Name] = trim($value);
else $arrInstance[$propItem->Name] = $value;
} else {
if (in_array($propItem->Name, $strValue)) {
if (is_string($value)) $arrInstance[$propItem->Name] = trim($value);
else $arrInstance[$propItem->Name] = $value;
}
}
}
$arrData[] = $arrInstance;
}
} catch (Exception $e) {
if (PSI_DEBUG) {
$this->error->addError($e->getCode(), $e->getMessage());
}
}
}
return $arrData;
}
/**
* get all configured plugins from config.php (file must be included before calling this function)
*
* @return array
*/
public static function getPlugins()
{
if ( defined('PSI_PLUGINS') && is_string(PSI_PLUGINS) ) {
if (preg_match(ARRAY_EXP, PSI_PLUGINS)) {
return eval(strtolower(PSI_PLUGINS));
} else {
return array(strtolower(PSI_PLUGINS));
}
} else {
return array();
}
}
}