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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 570 2012-04-16 07:10:52Z 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
{
/**
* phpSysInfo version
*
* @var string
*/
const PSI_VERSION = '3.0.17';
public static $PSI_VERSION_STRING = self::PSI_VERSION;
/**
* get svn version info
*
* @return none
*/
public static function checkForSVN()
{
if (file_exists (dirname(__FILE__) . '/.svn/entries')){
restore_error_handler();
$contents = file_get_contents(dirname(__FILE__) . '/.svn/entries');
set_error_handler('errorHandlerPsi');
if ($contents && preg_match("/dir\n(.+)/", $contents, $matches))
self::$PSI_VERSION_STRING = self::PSI_VERSION."-r".$matches[1];
}
}
/**
* 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)
{
$arrPath = array();
if (PHP_OS == 'WINNT') {
$strProgram .= '.exe';
$arrPath = preg_split('/;/', getenv("Path"), -1, PREG_SPLIT_NO_EMPTY);
} else {
$arrPath = preg_split('/:/', getenv("PATH"), -1, PREG_SPLIT_NO_EMPTY);
}
if (PSI_ADD_PATHS !== false) {
$addpaths = preg_split('/,/', PSI_ADD_PATHS, -1, PREG_SPLIT_NO_EMPTY);
$arrPath = array_merge($addpaths, $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) && PHP_OS != 'WINNT') {
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')) {
$open_basedir = preg_split('/:/', ini_get('open_basedir'), -1, PREG_SPLIT_NO_EMPTY);
}
foreach ($arrPath as $strPath) {
// To avoid "open_basedir restriction in effect" error when testing paths if restriction is enabled
if ((isset($open_basedir) && !in_array($strPath, $open_basedir)) || !is_dir($strPath)) {
continue;
}
$strProgrammpath = $strPath."/".$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)
{
$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"));
$process = proc_open($strProgram." ".$strArgs, $descriptorspec, $pipes);
if (is_resource($process)) {
$strBuffer .= self::_timeoutfgets($pipes, $strBuffer, $strError);
$return_value = proc_close($process);
}
$strError = trim($strError);
$strBuffer = trim($strBuffer);
if (! empty($strError) && $return_value <> 0) {
if ($booErrorRep) {
$error->addError($strProgram, $strError."\nReturn value: ".$return_value);
}
return false;
}
if (! empty($strError)) {
if ($booErrorRep) {
$error->addError($strProgram, $strError."\nReturn value: ".$return_value);
}
return true;
}
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)
{
$strFile = "";
$intCurLine = 1;
$error = Error::singleton();
if (file_exists($strFileName)) {
if ($fd = fopen($strFileName, 'r')) {
while (!feof($fd)) {
$strFile .= fgets($fd, $intBytes);
if ($intLines <= $intCurLine && $intLines != 0) {
break;
} else {
$intCurLine++;
}
}
fclose($fd);
$strRet = $strFile;
} else {
if ($booErrorRep) {
$error->addError('fopen('.$strFileName.')', 'file can not read by phpsysinfo');
}
return false;
}
} else {
if ($booErrorRep) {
$error->addError('file_exists('.$strFileName.')', 'the file does not exist on your machine');
}
return false;
}
return true;
}
/**
* 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())
{
$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 $sek timeout value in seconds
*
* @return void
*/
private static function _timeoutfgets($pipes, &$out, &$err, $sek = 10)
{
// fill output string
$time = $sek;
$w = null;
$e = null;
while ($time >= 0) {
$read = array($pipes[1]);
/*
while (!feof($read[0]) && ($n = stream_select($read, $w, $e, $time)) !== false && $n > 0 && strlen($c = fgetc($read[0])) > 0) {
$out .= $c;
*/
while (!feof($read[0]) && ($n = stream_select($read, $w, $e, $time)) !== false && $n > 0) {
$out .= fread($read[0], 4096);
}
--$time;
}
// fill error string
$time = $sek;
while ($time >= 0) {
$read = array($pipes[2]);
/*
while (!feof($read[0]) && ($n = stream_select($read, $w, $e, $time)) !== false && $n > 0 && strlen($c = fgetc($read[0])) > 0) {
$err .= $c;
*/
while (!feof($read[0]) && ($n = stream_select($read, $w, $e, $time)) !== false && $n > 0) {
$err .= fread($read[0], 4096);
}
--$time;
}
}
/**
* get all configured plugins from config.php (file must be included before calling this function)
*
* @return array
*/
public static function getPlugins()
{
$plugins = preg_split("/[\s]?,[\s]?/", PSI_PLUGINS, -1, PREG_SPLIT_NO_EMPTY);
return $plugins;
}
}
?>