43 lines
1.6 KiB
PHP
43 lines
1.6 KiB
PHP
<?php defined("SYSPATH") or die("No direct script access.");
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/**
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* Gallery - a web based photo album viewer and editor
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* Copyright (C) 2000-2011 Bharat Mediratta
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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class system_Core {
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/**
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* Return the path to an executable version of the named binary, or null.
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* Traverse the PATH environment variable looking for the given file. If
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* the $priority_path variable is set, check that path first.
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*/
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static function find_binary($binary, $priority_path=null) {
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$paths = array_merge(
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explode(":", getenv("PATH")),
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explode(":", module::get_var("gallery", "extra_binary_paths")));
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if ($priority_path) {
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array_unshift($paths, $priority_path);
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}
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foreach ($paths as $path) {
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$candidate = "$path/$binary";
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// @suppress errors below to avoid open_basedir issues
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if (@file_exists($candidate) && @is_executable($candidate)) {
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return $candidate;
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}
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}
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return null;
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}
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} |