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System.php
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System.php
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<?php
//
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2002 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Tomas V.V.Cox <cox@idecnet.com> |
// +----------------------------------------------------------------------+
//
// $Id$
//
require_once 'PEAR.php';
require_once 'Console/Getopt.php';
/**
* System offers cross plattform compatible system functions
*
* Static functions for different operations. Should work under
* Unix and Windows. The names and usage has been taken from its respectively
* GNU commands. The functions will return (bool) false on error and will
* trigger the error with the PHP trigger_error() function (you can silence
* the error by prefixing a '@' sign after the function call).
*
* Documentation on this class you can find in:
* http://pear.php.net/manual/
*
* Example usage:
* if (!@System::rm('-r file1 dir1')) {
* print "could not delete file1 or dir1";
* }
*
* @package System
* @author Tomas V.V.Cox <cox@idecnet.com>
* @version $Revision$
* @access public
* @see http://pear.php.net/manual/
*/
class System extends PEAR
{
/**
* returns the commandline arguments of a function
*
* @param string $argv the commandline
* @param string $short_options the allowed option short-tags
* @param string $long_options the allowed option long-tags
* @return array the given options and there values
* @access private
*/
function _parseArgs($argv, $short_options, $long_options = null)
{
if (!is_array($argv) && $argv !== null) {
$argv = preg_split('/\s+/', $argv);
}
return Console_Getopt::getopt($argv, $short_options);
}
/**
* Output errors with PHP trigger_error(). You can silence the errors
* with prefixing a "@" sign to the function call: @System::mkdir(..);
*
* @param mixed $error a PEAR error or a string with the error message
* @return bool false
* @access private
*/
function raiseError($error)
{
if (PEAR::isError($error)) {
$error = $error->getMessage();
}
trigger_error($error, E_USER_WARNING);
return false;
}
/**
* Creates a nested array representing the structure of a directory
*
* System::_dirToStruct('dir1', 0) =>
* Array
* (
* [dirs] => Array
* (
* [0] => dir1
* )
*
* [files] => Array
* (
* [0] => dir1/file2
* [1] => dir1/file3
* )
* )
* @param string $sPath Name of the directory
* @param integer $maxinst max. deep of the lookup
* @param integer $aktinst starting deep of the lookup
* @return array the structure of the dir
* @access private
*/
function _dirToStruct($sPath, $maxinst, $aktinst = 0)
{
$struct = array('dirs' => array(), 'files' => array());
if (($dir = @opendir($sPath)) === false) {
System::raiseError("Could not open dir $sPath");
return $struct; // XXX could not open error
}
$struct['dirs'][] = $sPath; // XXX don't add if '.' or '..' ?
$list = array();
while ($file = readdir($dir)) {
if ($file != '.' && $file != '..') {
$list[] = $file;
}
}
closedir($dir);
sort($list);
foreach($list as $val) {
$path = $sPath . DIRECTORY_SEPARATOR . $val;
if (is_dir($path)) {
if ($aktinst < $maxinst || $maxinst == 0) {
$tmp = System::_dirToStruct($path, $maxinst, $aktinst+1);
$struct = array_merge_recursive($tmp, $struct);
}
} else {
$struct['files'][] = $path;
}
}
return $struct;
}
/**
* Creates a nested array representing the structure of a directory and files
*
* @param array $files Array listing files and dirs
* @return array
* @see System::_dirToStruct()
*/
function _multipleToStruct($files)
{
$struct = array('dirs' => array(), 'files' => array());
foreach($files as $file) {
if (is_dir($file)) {
$tmp = System::_dirToStruct($file, 0);
$struct = array_merge_recursive($tmp, $struct);
} else {
$struct['files'][] = $file;
}
}
return $struct;
}
/**
* The rm command for removing files.
* Supports multiple files and dirs and also recursive deletes
*
* @param string $args the arguments for rm
* @return mixed PEAR_Error or true for success
* @access public
*/
function rm($args)
{
$opts = System::_parseArgs($args, 'rf'); // "f" do nothing but like it :-)
if (PEAR::isError($opts)) {
return System::raiseError($opts);
}
foreach($opts[0] as $opt) {
if ($opt[0] == 'r') {
$do_recursive = true;
}
}
$ret = true;
if (isset($do_recursive)) {
$struct = System::_multipleToStruct($opts[1]);
foreach($struct['files'] as $file) {
if (!unlink($file)) {
$ret = false;
}
}
foreach($struct['dirs'] as $dir) {
if (!rmdir($dir)) {
$ret = false;
}
}
} else {
foreach ($opts[1] as $file) {
$delete = (is_dir($file)) ? 'rmdir' : 'unlink';
if (!$delete($file)) {
$ret = false;
}
}
}
return $ret;
}
/**
* Make directories
*
* @param string $args the name of the director(y|ies) to create
* @return bool True for success
* @access public
*/
function mkDir($args)
{
$opts = System::_parseArgs($args, 'pm:');
if (PEAR::isError($opts)) {
return System::raiseError($opts);
}
$mode = 0777; // default mode
foreach($opts[0] as $opt) {
if ($opt[0] == 'p') {
$create_parents = true;
} elseif($opt[0] == 'm') {
$mode = $opt[1];
}
}
$ret = true;
if (isset($create_parents)) {
foreach($opts[1] as $dir) {
$dirstack = array();
while (!@is_dir($dir) && $dir != DIRECTORY_SEPARATOR) {
array_unshift($dirstack, $dir);
$dir = dirname($dir);
}
while ($newdir = array_shift($dirstack)) {
if (!mkdir($newdir, $mode)) {
$ret = false;
}
}
}
} else {
foreach($opts[1] as $dir) {
if (!@is_dir($dir) && !mkdir($dir, $mode)) {
$ret = false;
}
}
}
return $ret;
}
/**
* Concatenate files
*
* Usage:
* 1) $var = System::cat('sample.txt test.txt');
* 2) System::cat('sample.txt test.txt > final.txt');
* 3) System::cat('sample.txt test.txt >> final.txt');
*
* Note: as the class use fopen, urls should work also (test that)
*
* @param string $args the arguments
* @return boolean true on success
* @access public
*/
function &cat($args)
{
$ret = null;
$files = array();
if (!is_array($args)) {
$args = preg_split('/\s+/', $args);
}
for($i=0; $i < count($args); $i++) {
if ($args[$i] == '>') {
$mode = 'wb';
$outputfile = $args[$i+1];
break;
} elseif ($args[$i] == '>>') {
$mode = 'ab+';
$outputfile = $args[$i+1];
break;
} else {
$files[] = $args[$i];
}
}
if (isset($mode)) {
if (!$outputfd = fopen($outputfile, $mode)) {
return System::raiseError("Could not open $outputfile");
}
$ret = true;
}
foreach ($files as $file) {
if (!$fd = fopen($file, 'r')) {
System::raiseError("Could not open $file");
continue;
}
while(!feof($fd)) {
$cont = fread($fd, 2048);
if (isset($outputfd)) {
fwrite($outputfd, $cont);
} else {
$ret .= $cont;
}
}
fclose($fd);
}
if (@is_resource($outputfd)) {
fclose($outputfd);
}
return $ret;
}
/**
* Creates temporal files or directories
*
* Usage:
* 1) $tempfile = System::mktemp("prefix");
* 2) $tempdir = System::mktemp("-d prefix");
* 3) $tempfile = System::mktemp();
* 4) $tempfile = System::mktemp("-t /var/tmp prefix");
*
* prefix -> The string that will be prepended to the temp name
* (defaults to "tmp").
* -d -> A temporal dir will be created instead of a file.
* -t -> The target dir where the temporal (file|dir) will be created. If
* this param is missing by default the env vars TMP on Windows or
* TMPDIR in Unix will be used. If these vars are also missing
* c:\windows\temp or /tmp will be used.
*
* @param string $args The arguments
* @return mixed the full path of the created (file|dir) or false
* @see System::tmpdir()
* @access public
*/
function mktemp($args = null)
{
$opts = System::_parseArgs($args, 't:d');
if (PEAR::isError($opts)) {
return System::raiseError($opts);
}
foreach($opts[0] as $opt) {
if($opt[0] == 'd') {
$tmp_is_dir = true;
} elseif($opt[0] == 't') {
$tmpdir = $opt[1];
}
}
$prefix = (isset($opts[1][0])) ? $opts[1][0] : 'tmp';
if (!isset($tmpdir)) {
$tmpdir = System::tmpdir();
}
if (!System::mkDir("-p $tmpdir")) {
return false;
}
$tmp = tempnam($tmpdir, $prefix);
if (isset($tmp_is_dir)) {
unlink($tmp); // be careful possible race condition here
if (!mkdir($tmp, 0700)) {
return System::raiseError("Unable to create temporary directory $tmpdir");
}
}
return $tmp;
}
/**
* Get the path of the temporal directory set in the system
* by looking in its environments variables.
*
* @return string The temporal directory on the system
*/
function tmpdir()
{
if (OS_WINDOWS){
if (isset($_ENV['TEMP'])) {
return $_ENV['TEMP'];
}
if (isset($_ENV['TMP'])) {
return $_ENV['TMP'];
}
if (isset($_ENV['windir'])) {
return $_ENV['windir'] . '\temp';
}
return $_ENV['SystemRoot'] . '\temp';
}
if (isset($_ENV['TMPDIR'])) {
return $_ENV['TMPDIR'];
}
return '/tmp';
}
/**
* The "type" command (show the full path of a command)
*
* @param string $program The command to search for
* @return mixed A string with the full path or false if not found
* @author Stig Bakken <ssb@fast.no>
*/
function type($program)
{
// full path given
if (basename($program) != $program) {
return (@is_executable($program)) ? $program : false;
}
// XXX FIXME honor safe mode
$path_delim = OS_WINDOWS ? ';' : ':';
$exe_suffix = OS_WINDOWS ? '.exe' : '';
$path_elements = explode($path_delim, getenv('PATH'));
foreach ($path_elements as $dir) {
$file = $dir . DIRECTORY_SEPARATOR . $program . $exe_suffix;
if (@is_file($file) && @is_executable($file)) {
return $file;
}
}
return false;
}
}
?>