mambax7 / extgallery

class/pear/System.php

<?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
 * @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'] = [];

/**
 * System offers cross platform 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: 1.10.12
 * @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 $long_options  the allowed option long-tags
     * @return   array   the given options and there values
     */
    public static function _parseArgs($argv, $short_options, $long_options = null)
    {
        if (!is_array($argv) && null !== $argv) {

The condition is_array($argv) is always false.

The condition null !== $argv is always true.

            /*
            // 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);

It seems like $long_options can also be of type string; however, parameter $long_options of Console_Getopt::getopt2() does only seem to accept array, maybe add an additional type check?

    }

    /**
     * Output errors with PHP trigger_error(). You can silence the errors
     * with prefixing a "@" sign to the function call: @System::mkdir(..);
     *
     * @param mixed $error a PEAR error or a string with the error message
     * @return bool false
     */
    protected static function raiseError($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 int    $maxinst max. deep of the lookup
     * @param int    $aktinst starting deep of the lookup
     * @param bool   $silent  if true, do not emit errors.
     * @return   array   the structure of the dir
     */
    protected static function _dirToStruct($sPath, $maxinst, $aktinst = 0, $silent = false)
    {
        $struct = ['dirs' => [], 'files' => []];
        if (false === ($dir = @opendir($sPath))) {
            if (!$silent) {
                self::raiseError("Could not open dir $sPath");
            }
            return $struct; // XXX could not open error
        }

        $struct['dirs'][] = $sPath = realpath($sPath); // XXX don't add if '.' or '..' ?
        $list             = [];
        while (false !== ($file = readdir($dir))) {
            if ('.' != $file && '..' != $file) {
                $list[] = $file;
            }
        }

        closedir($dir);
        natsort($list);
        if ($aktinst < $maxinst || 0 == $maxinst) {
            foreach ($list as $val) {
                $path = $sPath . DIRECTORY_SEPARATOR . $val;
                if (is_dir($path) && !is_link($path)) {
                    $tmp    = self::_dirToStruct($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 $files Array listing files and dirs
     * @return   array
     * @static
     * @see System::_dirToStruct()
     */
    protected static function _multipleToStruct($files)
    {
        $struct = ['dirs' => [], 'files' => []];
        $files  = (array)$files;
        foreach ($files as $file) {
            if (is_dir($file) && !is_link($file)) {
                $tmp    = self::_dirToStruct($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 $args the arguments for rm
     * @return   mixed   PEAR_Error or true for success
     * @static
     * @access   public
     */
    public static function rm($args)
    {
        $opts = self::_parseArgs($args, 'rf'); // "f" does nothing but I like it :-)
        if (PEAR::isError($opts)) {
            return self::raiseError($opts);
        }
        foreach ($opts[0] as $opt) {
            if ('r' == $opt[0]) {
                $do_recursive = true;
            }
        }
        $ret = true;
        if (isset($do_recursive)) {
            $struct = self::_multipleToStruct($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 $args the name of the director(y|ies) to create
     * @return   bool    True for success
     */
    public static function mkDir($args)
    {
        $opts = self::_parseArgs($args, 'pm:');
        if (PEAR::isError($opts)) {
            return self::raiseError($opts);
        }

        $mode = 0777; // default mode
        foreach ($opts[0] as $opt) {
            if ('p' == $opt[0]) {
                $create_parents = true;
            } elseif ('m' == $opt[0]) {
                // if the mode is clearly an octal number (starts with 0)
                // convert it to decimal
                if (strlen($opt[1]) && '0' == $opt[1][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) {
                $dirstack = [];
                while ((!is_dir($dir) || !is_dir($dir))
                       && DIRECTORY_SEPARATOR != $dir) {
                    array_unshift($dirstack, $dir);
                    $dir = \dirname($dir);
                }

                while ($newdir = array_shift($dirstack)) {
                    if (!is_writable(dirname($newdir))) {
                        $ret = false;
                        break;
                    }

                    if (!mkdir($newdir, $mode)) {
                        $ret = false;
                    }
                }
            }
        } else {
            foreach ($opts[1] as $dir) {
                if ((@is_dir($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
     *
     * @param string $args the arguments
     * @return   bool true on success
     */
    public static function &cat($args)
    {
        $ret   = null;
        $files = [];
        if (!is_array($args)) {

The condition is_array($args) is always false.

            $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)) {

The variable $outputfile does not seem to be defined for all execution paths leading up to this point.

                $err = self::raiseError("Could not open $outputfile");
                return $err;
            }
            $ret = true;
        }
        foreach ($files as $file) {
            if (!$fd = fopen($file, 'r')) {
                self::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;

The expression return $ret also could return the type string which is incompatible with the documented return type boolean.

    }

    /**
     * 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 $args The arguments
     * @return  mixed   the full path of the created (file|dir) or false
     * @see System::tmpdir()
     */
    public static function mktemp($args = null)
    {
        static $first_time = true;
        $opts = self::_parseArgs($args, 't:d');
        if (PEAR::isError($opts)) {
            return self::raiseError($opts);
        }

        foreach ($opts[0] as $opt) {
            if ('d' == $opt[0]) {
                $tmp_is_dir = true;
            } elseif ('t' == $opt[0]) {
                $tmpdir = $opt[1];
            }
        }

        $prefix = $opts[1][0] ?? 'tmp';
        if (!isset($tmpdir)) {
            $tmpdir = self::tmpdir();
        }

        if (!self::mkDir(['-p', $tmpdir])) {

array('-p', $tmpdir) of type array<integer,mixed|string> is incompatible with the type string expected by parameter $args of System::mkDir().

            return false;
        }

        $tmp = tempnam($tmpdir, $prefix);
        if (isset($tmp_is_dir)) {
            unlink($tmp); // be careful possible race condition here
            if (!mkdir($tmp, 0700)) {
                return self::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(['System', '_removeTmpFiles']);
            $first_time = false;
        }

        return $tmp;
    }

    /**
     * Remove temporary files created my mkTemp. This function is executed
     * at script shutdown time
     */
    public static function _removeTmpFiles()
    {
        if (count($GLOBALS['_System_temp_files'])) {
            $delete = $GLOBALS['_System_temp_files'];
            array_unshift($delete, '-r');
            self::rm($delete);
            $GLOBALS['_System_temp_files'] = [];
        }
    }

    /**
     * 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 $_ENV array, that s why we do tests with _ENV
     *
     * @return string The temporary directory on the system
     */
    public static function tmpdir()
    {
        if (OS_WINDOWS) {
            if ($var = $_ENV['TMP'] ?? getenv('TMP')) {
                return $var;
            }
            if ($var = $_ENV['TEMP'] ?? getenv('TEMP')) {
                return $var;
            }
            if ($var = $_ENV['USERPROFILE'] ?? getenv('USERPROFILE')) {
                return $var;
            }
            if ($var = $_ENV['windir'] ?? getenv('windir')) {
                return $var;
            }
            return getenv('SystemRoot') . '\temp';
        }
        if ($var = $_ENV['TMPDIR'] ?? getenv('TMPDIR')) {
            return $var;
        }
        return realpath(function_exists('sys_get_temp_dir') ? sys_get_temp_dir() : '/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 $program is not found
     *
     * @return mixed A string with the full path or false if not found
     * @author Stig Bakken <ssb@php.net>
     */
    public static function which($program, $fallback = false)
    {
        // enforce API
        if (!is_string($program) || '' == $program) {

The condition is_string($program) is always true.

            return $fallback;
        }

        // full path given
        if (basename($program) != $program) {
            $path_elements[] = \dirname($program);

$path_elements was never initialized. Although not strictly required by PHP, it is generally a good practice to add $path_elements = array(); before regardless.

            $program         = basename($program);
        } else {
            $path = getenv('PATH');
            if (!$path) {
                $path = getenv('Path'); // some OSes are just stupid enough to do this
            }

            $path_elements = explode(PATH_SEPARATOR, $path);
        }

        if (OS_WINDOWS) {
            $exe_suffixes = getenv('PATHEXT') ? explode(PATH_SEPARATOR, getenv('PATHEXT')) : ['.exe', '.bat', '.cmd', '.com'];
            // allow passing a command.exe param
            if (false !== strpos($program, '.')) {
                array_unshift($exe_suffixes, '');
            }
        } else {
            $exe_suffixes = [''];
        }

        foreach ($exe_suffixes as $suff) {
            foreach ($path_elements as $dir) {
                $file = $dir . DIRECTORY_SEPARATOR . $program . $suff;
                // It's possible to run a .bat on Windows that is_executable
                // would return false for. The is_executable check is meaningless...
                if (OS_WINDOWS) {
                    return $file;
                } else {
                    if (is_executable($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 implemented:
     * $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

The type Either was not found. Maybe you did not declare it correctly or list all dependencies?

     * @return array Array of found files
     */
    public 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 [];
        }
        $patterns   = [];
        $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], ['d', 'f'])) {
                        if ('d' == $args[$i + 1]) {
                            $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, ['\?' => '.', '\*' => '.*']);
                    $patterns[] = '(' . $name . ')';
                    $i++;
                    break;
                case '-maxdepth':
                    $depth = $args[$i + 1];
                    break;
            }
        }
        $path = self::_dirToStruct($dir, $depth, 0, true);
        if ($do_files && $do_dirs) {

The condition $do_dirs is always true.

            $files = array_merge($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         = [];
            $files_count = count($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;
    }
}