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<?php
/**
* File/Directory manipulation
*
* PHP versions 4 and 5
*
* @category pear
* @package System
* @author Tomas V.V.Cox <cox@idecnet.com>
* @copyright 1997-2009 The Authors
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @version CVS: $Id$
* @link http://pear.php.net/package/PEAR
* @since File available since Release 0.1
*/
/**
* base class
*/
require_once 'PEAR.php';
require_once 'Console/Getopt.php';
$GLOBALS['_System_temp_files'] = array();
/**
* 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, but this
* is not recommended practice. Instead use an error handler with
* {@link set_error_handler()}).
*
* 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";
* }
*
* In case you need to to pass file names with spaces,
* pass the params as an array:
*
* System::rm(array('-r', $file1, $dir1));
*
* @category pear
* @package System
* @author Tomas V.V. Cox <cox@idecnet.com>
* @copyright 1997-2006 The PHP Group
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @version Release: 1.9.5
* @link http://pear.php.net/package/PEAR
* @since Class available since Release 0.1
* @static
*/
class System
{
/**
* returns the commandline arguments of a function
*
* @param string $argv the commandline
* @param string $short_options the allowed option short-tags
* @param string $long_options the allowed option long-tags
* @return array the given options and there values
* @static
* @access private
*/
function _parseArgs($argv, $short_options, $long_options = null)
{
if (!is_array($argv) && $argv !== null) {
/*
// Quote all items that are a short option
$av = preg_split('/(\A| )--?[a-z0-9]+[ =]?((?<!\\\\)((,\s*)|((?<!,)\s+))?)/i', $argv, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_OFFSET_CAPTURE);
$offset = 0;
foreach ($av as $a) {
$b = trim($a[0]);
if ($b{0} == '"' || $b{0} == "'") {
continue;
}
$escape = escapeshellarg($b);
$pos = $a[1] + $offset;
$argv = substr_replace($argv, $escape, $pos, strlen($b));
$offset += 2;
}
*/
// Find all items, quoted or otherwise
preg_match_all("/(?:[\"'])(.*?)(?:['\"])|([^\s]+)/", $argv, $av);
$argv = $av[1];
foreach ($av[2] as $k => $a) {
if (empty($a)) {
continue;
}
$argv[$k] = trim($a) ;
}
}
return Console_Getopt::getopt2($argv, $short_options, $long_options);
}
/**
* Output errors with PHP trigger_error(). You can silence the errors
* with prefixing a "@" sign to the function call: @System::mkdir(..);
*
* @param mixed $error a PEAR error or a string with the error message
* @return bool false
* @static
* @access private
*/
function raiseError($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
* @param bool $silent if true, do not emit errors.
* @return array the structure of the dir
* @static
* @access private
*/
function _dirToStruct($sPath, $maxinst, $aktinst = 0, $silent = false)
{
$struct = array('dirs' => array(), 'files' => array());
if (($dir = @opendir($sPath)) === false) {
if (!$silent) {
System::raiseError("Could not open dir $sPath");
}
return $struct; // XXX could not open error
}
$struct['dirs'][] = $sPath = realpath($sPath); // XXX don't add if '.' or '..' ?
$list = array();
while (false !== ($file = readdir($dir))) {
if ($file != '.' && $file != '..') {
$list[] = $file;
}
}
closedir($dir);
natsort($list);
if ($aktinst < $maxinst || $maxinst == 0) {
foreach ($list as $val) {
$path = $sPath . DIRECTORY_SEPARATOR . $val;
if (is_dir($path) && !is_link($path)) {
$tmp = System::_dirToStruct($path, $maxinst, $aktinst+1, $silent);
$struct = array_merge_recursive($struct, $tmp);
} else {
$struct['files'][] = $path;
}
}
}
return $struct;
}
/**
* Creates a nested array representing the structure of a directory and files
*
* @param array $files Array listing files and dirs
* @return array
* @static
* @see System::_dirToStruct()
*/
function _multipleToStruct($files)
{
$struct = array('dirs' => array(), 'files' => array());
settype($files, 'array');
foreach ($files as $file) {
if (is_dir($file) && !is_link($file)) {
$tmp = System::_dirToStruct($file, 0);
$struct = array_merge_recursive($tmp, $struct);
} else {
if (!in_array($file, $struct['files'])) {
$struct['files'][] = $file;
}
}
}
return $struct;
}
/**
* The rm command for removing files.
* Supports multiple files and dirs and also recursive deletes
*
* @param string $args the arguments for rm
* @return mixed PEAR_Error or true for success
* @static
* @access public
*/
function rm($args)
{
$opts = System::_parseArgs($args, 'rf'); // "f" does nothing but I 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)) {
$ret = false;
}
}
rsort($struct['dirs']);
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.
*
* The -p option will create parent directories
* @param string $args the name of the director(y|ies) to create
* @return bool True for success
* @static
* @access public
*/
function mkDir($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') {
// if the mode is clearly an octal number (starts with 0)
// convert it to decimal
if (strlen($opt[1]) && $opt[1]{0} == '0') {
$opt[1] = octdec($opt[1]);
} else {
// convert to int
$opt[1] += 0;
}
$mode = $opt[1];
}
}
$ret = true;
if (isset($create_parents)) {
foreach ($opts[1] as $dir) {
$dirstack = array();
while ((!file_exists($dir) || !is_dir($dir)) &&
$dir != DIRECTORY_SEPARATOR) {
array_unshift($dirstack, $dir);
$dir = dirname($dir);
}
while ($newdir = array_shift($dirstack)) {
if (!is_writeable(dirname($newdir))) {
$ret = false;
break;
}
if (!mkdir($newdir, $mode)) {
$ret = false;
}
}
}
} else {
foreach($opts[1] as $dir) {
if ((@file_exists($dir) || !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 $args the arguments
* @return boolean true on success
* @static
* @access public
*/
function &cat($args)
{
$ret = null;
$files = array();
if (!is_array($args)) {
$args = preg_split('/\s+/', $args, -1, PREG_SPLIT_NO_EMPTY);
}
$count_args = count($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];
}
}
$outputfd = false;
if (isset($mode)) {
if (!$outputfd = fopen($outputfile, $mode)) {
$err = System::raiseError("Could not open $outputfile");
return $err;
}
$ret = true;
}
foreach ($files as $file) {
if (!$fd = fopen($file, 'r')) {
System::raiseError("Could not open $file");
continue;
}
while ($cont = fread($fd, 2048)) {
if (is_resource($outputfd)) {
fwrite($outputfd, $cont);
} else {
$ret .= $cont;
}
}
fclose($fd);
}
if (is_resource($outputfd)) {
fclose($outputfd);
}
return $ret;
}
/**
* Creates temporary files or directories. This function will remove
* the created files when the scripts finish its execution.
*
* 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 temporary dir will be created instead of a file.
* -t -> The target dir where the temporary (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 $args The arguments
* @return mixed the full path of the created (file|dir) or false
* @see System::tmpdir()
* @static
* @access public
*/
function mktemp($args = null)
{
static $first_time = true;
$opts = System::_parseArgs($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(array('-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");
}
}
$GLOBALS['_System_temp_files'][] = $tmp;
if (isset($tmp_is_dir)) {
//$GLOBALS['_System_temp_files'][] = dirname($tmp);
}
if ($first_time) {
PEAR::registerShutdownFunc(array('System', '_removeTmpFiles'));
$first_time = false;
}
return $tmp;
}
/**
* Remove temporary files created my mkTemp. This function is executed
* at script shutdown time
*
* @static
* @access private
*/
function _removeTmpFiles()
{
if (count($GLOBALS['_System_temp_files'])) {
$delete = $GLOBALS['_System_temp_files'];
array_unshift($delete, '-r');
System::rm($delete);
$GLOBALS['_System_temp_files'] = array();
}
}
/**
* Get the path of the temporal directory set in the system
* by looking in its environments variables.
* Note: php.ini-recommended removes the "E" from the variables_order setting,
* making unavaible the $_ENV array, that s why we do tests with _ENV
*
* @static
* @return string The temporary directory on the system
*/
function tmpdir()
{
if (OS_WINDOWS) {
if ($var = isset($_ENV['TMP']) ? $_ENV['TMP'] : getenv('TMP')) {
return $var;
}
if ($var = isset($_ENV['TEMP']) ? $_ENV['TEMP'] : getenv('TEMP')) {
return $var;
}
if ($var = isset($_ENV['USERPROFILE']) ? $_ENV['USERPROFILE'] : getenv('USERPROFILE')) {
return $var;
}
if ($var = isset($_ENV['windir']) ? $_ENV['windir'] : getenv('windir')) {
return $var;
}
return getenv('SystemRoot') . '\temp';
}
if ($var = isset($_ENV['TMPDIR']) ? $_ENV['TMPDIR'] : getenv('TMPDIR')) {
return $var;
}
return realpath('/tmp');
}
/**
* The "which" command (show the full path of a command)
*
* @param string $program The command to search for
* @param mixed $fallback Value to return if $program is not found
*
* @return mixed A string with the full path or false if not found
* @static
* @author Stig Bakken <ssb@php.net>
*/
function which($program, $fallback = false)
{
// enforce API
if (!is_string($program) || '' == $program) {
return $fallback;
}
// full path given
if (basename($program) != $program) {
$path_elements[] = dirname($program);
$program = basename($program);
} else {
// Honor safe mode
if (!ini_get('safe_mode') || !$path = ini_get('safe_mode_exec_dir')) {
$path = getenv('PATH');
if (!$path) {
$path = getenv('Path'); // some OSes are just stupid enough to do this
}
}
$path_elements = explode(PATH_SEPARATOR, $path);
}
if (OS_WINDOWS) {
$exe_suffixes = getenv('PATHEXT')
? explode(PATH_SEPARATOR, getenv('PATHEXT'))
: array('.exe','.bat','.cmd','.com');
// allow passing a command.exe param
if (strpos($program, '.') !== false) {
array_unshift($exe_suffixes, '');
}
// is_executable() is not available on windows for PHP4
$pear_is_executable = (function_exists('is_executable')) ? 'is_executable' : 'is_file';
} else {
$exe_suffixes = array('');
$pear_is_executable = 'is_executable';
}
foreach ($exe_suffixes as $suff) {
foreach ($path_elements as $dir) {
$file = $dir . DIRECTORY_SEPARATOR . $program . $suff;
if (@$pear_is_executable($file)) {
return $file;
}
}
}
return $fallback;
}
/**
* The "find" command
*
* Usage:
*
* System::find($dir);
* System::find("$dir -type d");
* System::find("$dir -type f");
* System::find("$dir -name *.php");
* System::find("$dir -name *.php -name *.htm*");
* System::find("$dir -maxdepth 1");
*
* Params implmented:
* $dir -> Start the search at this directory
* -type d -> return only directories
* -type f -> return only files
* -maxdepth <n> -> max depth of recursion
* -name <pattern> -> search pattern (bash style). Multiple -name param allowed
*
* @param mixed Either array or string with the command line
* @return array Array of found files
* @static
*
*/
function find($args)
{
if (!is_array($args)) {
$args = preg_split('/\s+/', $args, -1, PREG_SPLIT_NO_EMPTY);
}
$dir = realpath(array_shift($args));
if (!$dir) {
return array();
}
$patterns = array();
$depth = 0;
$do_files = $do_dirs = true;
$args_count = count($args);
for ($i = 0; $i < $args_count; $i++) {
switch ($args[$i]) {
case '-type':
if (in_array($args[$i+1], array('d', 'f'))) {
if ($args[$i+1] == 'd') {
$do_files = false;
} else {
$do_dirs = false;
}
}
$i++;
break;
case '-name':
$name = preg_quote($args[$i+1], '#');
// our magic characters ? and * have just been escaped,
// so now we change the escaped versions to PCRE operators
$name = strtr($name, array('\?' => '.', '\*' => '.*'));
$patterns[] = '('.$name.')';
$i++;
break;
case '-maxdepth':
$depth = $args[$i+1];
break;
}
}
$path = System::_dirToStruct($dir, $depth, 0, true);
if ($do_files && $do_dirs) {
$files = array_merge($path['files'], $path['dirs']);
} elseif ($do_dirs) {
$files = $path['dirs'];
} else {
$files = $path['files'];
}
if (count($patterns)) {
$dsq = preg_quote(DIRECTORY_SEPARATOR, '#');
$pattern = '#(^|'.$dsq.')'.implode('|', $patterns).'($|'.$dsq.')#';
$ret = array();
$files_count = count($files);
for ($i = 0; $i < $files_count; $i++) {
// only search in the part of the file below the current directory
$filepart = basename($files[$i]);
if (preg_match($pattern, $filepart)) {
$ret[] = $files[$i];
}
}
return $ret;
}
return $files;
}
}
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