450 Zeilen
14 KiB
PHP
450 Zeilen
14 KiB
PHP
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2003 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.0 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available through the world-wide-web at the following url: |
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// | http://www.php.net/license/3_0.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Authors: Tomas V.V.Cox <cox@idecnet.com> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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require_once 'PEAR.php';
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require_once 'Console/Getopt.php';
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$GLOBALS['_System_temp_files'] = array();
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/**
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* System offers cross plattform compatible system functions
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*
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* Static functions for different operations. Should work under
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* Unix and Windows. The names and usage has been taken from its respectively
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* GNU commands. The functions will return (bool) false on error and will
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* trigger the error with the PHP trigger_error() function (you can silence
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* the error by prefixing a '@' sign after the function call).
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*
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* Documentation on this class you can find in:
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* http://pear.php.net/manual/
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*
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* Example usage:
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* if (!@System::rm('-r file1 dir1')) {
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* print "could not delete file1 or dir1";
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* }
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*
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* @package System
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* @author Tomas V.V.Cox <cox@idecnet.com>
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* @version $Revision$
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* @access public
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* @see http://pear.php.net/manual/
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*/
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class System
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{
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/**
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* returns the commandline arguments of a function
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*
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* @param string $argv the commandline
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* @param string $short_options the allowed option short-tags
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* @param string $long_options the allowed option long-tags
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* @return array the given options and there values
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* @access private
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*/
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function _parseArgs($argv, $short_options, $long_options = null)
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{
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if (!is_array($argv) && $argv !== null) {
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$argv = preg_split('/\s+/', ': '.$argv);
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}
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return Console_Getopt::getopt($argv, $short_options);
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}
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/**
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* Output errors with PHP trigger_error(). You can silence the errors
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* with prefixing a "@" sign to the function call: @System::mkdir(..);
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*
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* @param mixed $error a PEAR error or a string with the error message
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* @return bool false
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* @access private
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*/
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function raiseError($error)
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{
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if (PEAR::isError($error)) {
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$error = $error->getMessage();
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}
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trigger_error($error, E_USER_WARNING);
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return false;
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}
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/**
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* Creates a nested array representing the structure of a directory
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*
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* System::_dirToStruct('dir1', 0) =>
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* Array
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* (
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* [dirs] => Array
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* (
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* [0] => dir1
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* )
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*
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* [files] => Array
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* (
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* [0] => dir1/file2
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* [1] => dir1/file3
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* )
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* )
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* @param string $sPath Name of the directory
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* @param integer $maxinst max. deep of the lookup
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* @param integer $aktinst starting deep of the lookup
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* @return array the structure of the dir
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* @access private
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*/
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function _dirToStruct($sPath, $maxinst, $aktinst = 0)
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{
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$struct = array('dirs' => array(), 'files' => array());
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if (($dir = @opendir($sPath)) === false) {
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System::raiseError("Could not open dir $sPath");
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return $struct; // XXX could not open error
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}
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$struct['dirs'][] = $sPath; // XXX don't add if '.' or '..' ?
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$list = array();
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while ($file = readdir($dir)) {
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if ($file != '.' && $file != '..') {
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$list[] = $file;
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}
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}
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closedir($dir);
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sort($list);
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foreach($list as $val) {
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$path = $sPath . DIRECTORY_SEPARATOR . $val;
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if (is_dir($path)) {
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if ($aktinst < $maxinst || $maxinst == 0) {
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$tmp = System::_dirToStruct($path, $maxinst, $aktinst+1);
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$struct = array_merge_recursive($tmp, $struct);
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}
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} else {
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$struct['files'][] = $path;
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}
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}
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return $struct;
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}
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/**
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* Creates a nested array representing the structure of a directory and files
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*
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* @param array $files Array listing files and dirs
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* @return array
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* @see System::_dirToStruct()
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*/
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function _multipleToStruct($files)
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{
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$struct = array('dirs' => array(), 'files' => array());
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settype($files, 'array');
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foreach ($files as $file) {
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if (is_dir($file)) {
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$tmp = System::_dirToStruct($file, 0);
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$struct = array_merge_recursive($tmp, $struct);
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} else {
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$struct['files'][] = $file;
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}
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}
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return $struct;
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}
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/**
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* The rm command for removing files.
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* Supports multiple files and dirs and also recursive deletes
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*
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* @param string $args the arguments for rm
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* @return mixed PEAR_Error or true for success
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* @access public
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*/
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function rm($args)
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{
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$opts = System::_parseArgs($args, 'rf'); // "f" do nothing but like it :-)
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if (PEAR::isError($opts)) {
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return System::raiseError($opts);
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}
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foreach($opts[0] as $opt) {
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if ($opt[0] == 'r') {
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$do_recursive = true;
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}
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}
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$ret = true;
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if (isset($do_recursive)) {
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$struct = System::_multipleToStruct($opts[1]);
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foreach($struct['files'] as $file) {
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if (!@unlink($file)) {
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$ret = false;
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}
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}
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foreach($struct['dirs'] as $dir) {
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if (!@rmdir($dir)) {
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$ret = false;
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}
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}
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} else {
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foreach ($opts[1] as $file) {
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$delete = (is_dir($file)) ? 'rmdir' : 'unlink';
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if (!@$delete($file)) {
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$ret = false;
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}
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}
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}
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return $ret;
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}
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/**
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* Make directories. Note that we use call_user_func('mkdir') to avoid
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* a problem with ZE2 calling System::mkDir instead of the native PHP func.
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*
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* @param string $args the name of the director(y|ies) to create
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* @return bool True for success
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* @access public
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*/
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function mkDir($args)
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{
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$opts = System::_parseArgs($args, 'pm:');
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if (PEAR::isError($opts)) {
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return System::raiseError($opts);
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}
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$mode = 0777; // default mode
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foreach($opts[0] as $opt) {
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if ($opt[0] == 'p') {
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$create_parents = true;
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} elseif($opt[0] == 'm') {
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$mode = $opt[1];
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}
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}
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$ret = true;
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if (isset($create_parents)) {
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foreach($opts[1] as $dir) {
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$dirstack = array();
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while (!@is_dir($dir) && $dir != DIRECTORY_SEPARATOR) {
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array_unshift($dirstack, $dir);
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$dir = dirname($dir);
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}
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while ($newdir = array_shift($dirstack)) {
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if (!call_user_func('mkdir', $newdir, $mode)) {
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$ret = false;
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}
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}
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}
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} else {
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foreach($opts[1] as $dir) {
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if (!@is_dir($dir) && !call_user_func('mkdir', $dir, $mode)) {
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$ret = false;
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}
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}
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}
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return $ret;
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}
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/**
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* Concatenate files
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*
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* Usage:
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* 1) $var = System::cat('sample.txt test.txt');
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* 2) System::cat('sample.txt test.txt > final.txt');
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* 3) System::cat('sample.txt test.txt >> final.txt');
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*
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* Note: as the class use fopen, urls should work also (test that)
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*
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* @param string $args the arguments
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* @return boolean true on success
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* @access public
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*/
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function &cat($args)
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{
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$ret = null;
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$files = array();
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if (!is_array($args)) {
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$args = preg_split('/\s+/', $args);
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}
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for($i=0; $i < count($args); $i++) {
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if ($args[$i] == '>') {
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$mode = 'wb';
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$outputfile = $args[$i+1];
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break;
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} elseif ($args[$i] == '>>') {
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$mode = 'ab+';
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$outputfile = $args[$i+1];
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break;
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} else {
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$files[] = $args[$i];
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}
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}
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if (isset($mode)) {
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if (!$outputfd = fopen($outputfile, $mode)) {
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return System::raiseError("Could not open $outputfile");
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}
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$ret = true;
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}
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foreach ($files as $file) {
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if (!$fd = fopen($file, 'r')) {
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System::raiseError("Could not open $file");
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continue;
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}
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while ($cont = fread($fd, 2048)) {
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if (isset($outputfd)) {
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fwrite($outputfd, $cont);
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} else {
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$ret .= $cont;
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}
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}
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fclose($fd);
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}
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if (@is_resource($outputfd)) {
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fclose($outputfd);
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}
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return $ret;
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}
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/**
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* Creates temporary files or directories. This function will remove
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* the created files when the scripts finish its execution.
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*
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* Usage:
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* 1) $tempfile = System::mktemp("prefix");
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* 2) $tempdir = System::mktemp("-d prefix");
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* 3) $tempfile = System::mktemp();
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* 4) $tempfile = System::mktemp("-t /var/tmp prefix");
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*
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* prefix -> The string that will be prepended to the temp name
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* (defaults to "tmp").
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* -d -> A temporary dir will be created instead of a file.
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* -t -> The target dir where the temporary (file|dir) will be created. If
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* this param is missing by default the env vars TMP on Windows or
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* TMPDIR in Unix will be used. If these vars are also missing
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* c:\windows\temp or /tmp will be used.
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*
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* @param string $args The arguments
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* @return mixed the full path of the created (file|dir) or false
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* @see System::tmpdir()
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* @access public
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*/
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function mktemp($args = null)
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{
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static $first_time = true;
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$opts = System::_parseArgs($args, 't:d');
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if (PEAR::isError($opts)) {
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return System::raiseError($opts);
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}
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foreach($opts[0] as $opt) {
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if($opt[0] == 'd') {
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$tmp_is_dir = true;
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} elseif($opt[0] == 't') {
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$tmpdir = $opt[1];
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}
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}
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$prefix = (isset($opts[1][0])) ? $opts[1][0] : 'tmp';
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if (!isset($tmpdir)) {
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$tmpdir = System::tmpdir();
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}
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if (!System::mkDir("-p $tmpdir")) {
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return false;
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}
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$tmp = tempnam($tmpdir, $prefix);
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if (isset($tmp_is_dir)) {
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unlink($tmp); // be careful possible race condition here
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if (!call_user_func('mkdir', $tmp, 0700)) {
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return System::raiseError("Unable to create temporary directory $tmpdir");
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}
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}
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$GLOBALS['_System_temp_files'][] = $tmp;
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if ($first_time) {
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PEAR::registerShutdownFunc(array('System', '_removeTmpFiles'));
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$first_time = false;
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}
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return $tmp;
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}
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/**
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* Remove temporary files created my mkTemp. This function is executed
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* at script shutdown time
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*
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* @access private
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*/
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function _removeTmpFiles()
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{
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if (count($GLOBALS['_System_temp_files'])) {
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$delete = $GLOBALS['_System_temp_files'];
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array_unshift($delete, '-r');
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System::rm($delete);
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}
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}
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/**
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* Get the path of the temporal directory set in the system
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* by looking in its environments variables.
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* Note: php.ini-recommended removes the "E" from the variables_order setting,
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* making unavaible the $_ENV array, that s why we do tests with _ENV
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*
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* @return string The temporal directory on the system
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*/
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function tmpdir()
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{
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if (OS_WINDOWS) {
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if ($var = isset($_ENV['TEMP']) ? $_ENV['TEMP'] : getenv('TEMP')) {
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return $var;
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}
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if ($var = isset($_ENV['TMP']) ? $_ENV['TMP'] : getenv('TMP')) {
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return $var;
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}
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if ($var = isset($_ENV['windir']) ? $_ENV['windir'] : getenv('windir')) {
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return $var;
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}
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return getenv('SystemRoot') . '\temp';
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}
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if ($var = isset($_ENV['TMPDIR']) ? $_ENV['TMPDIR'] : getenv('TMPDIR')) {
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return $var;
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}
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return '/tmp';
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}
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/**
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* The "which" command (show the full path of a command)
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*
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* @param string $program The command to search for
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* @return mixed A string with the full path or false if not found
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* @author Stig Bakken <ssb@php.net>
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*/
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function which($program, $fallback = false)
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{
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// is_executable() is not available on windows
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if (OS_WINDOWS) {
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$pear_is_executable = 'is_file';
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} else {
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$pear_is_executable = 'is_executable';
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}
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// full path given
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if (basename($program) != $program) {
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return (@$pear_is_executable($program)) ? $program : $fallback;
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}
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// XXX FIXME honor safe mode
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$path_delim = OS_WINDOWS ? ';' : ':';
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$exe_suffixes = OS_WINDOWS ? array('.exe','.bat','.cmd','.com') : array('');
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$path_elements = explode($path_delim, getenv('PATH'));
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foreach ($exe_suffixes as $suff) {
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foreach ($path_elements as $dir) {
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$file = $dir . DIRECTORY_SEPARATOR . $program . $suff;
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if (@is_file($file) && @$pear_is_executable($file)) {
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return $file;
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}
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}
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}
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return $fallback;
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}
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}
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?>
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