pfSense

 * sweep_package_processes(): Periodically kill a package's unnecessary processes

 *			      that may still be running (a server that does not automatically timeout, for example)

 *                             NOTE: this command takes 5 seconds to run

/*

 * reverse_strrchr($haystack, $needle):  Return everything in $haystack up to the *last* instance of $needle. 

 *					 Useful for finding paths and stripping file extensions.

 */

function reverse_strrchr($haystack, $needle) {

	$pos = strrpos($haystack, $needle);

	if($post === false) {

		return $haystack;

	}

	return substr($haystack, 0, $post + 1);

}

/*

 * get_package_xml_depends($pkg_name):  Return a package's XML dependencies (additional tabs etc)

 */

function get_package_xml_depends($pkg_name) {

	global $config;

	if ($config['installedpackages'][$pkg_name] != "") { // Make sure this package really exists before continuing.

		$package = $config['installedpackages'][$pkg_name];

		if(!file_exists("/usr/local/pkg/" . $package['configurationfile'])) { // If the package's config file doesn't exist, log an error and fetch it.

			log_error("Fetching missing configuration XML for " . $pkg_name);

			mwexec("/usr/bin/fetch -o /usr/local/pkg/" . $package['configurationfile'] . " http://www.pfsense.com/packages/config/" . $package['configurationfile']);

		}

	} else {

		return; // This package isn't installed.

	}

	$pkg_xml = parse_xml_config_pkg("/usr/local/pkg" . $package['configurationfile'], "packagegui");

	if($pkg_xml['additional_files_needed'] != "") {

		foreach($pkg_xml['additional_files_needed'] as $item) {

			$depend_file = substr(strrchr($item['item'], "/"),1); // Strip URLs down to filenames.

			if(!preg_match("/\.xml/i", $depend_file)) break; // If the file doesn't end in .xml (case-insensitive) exit the loop.

			if(!file_exists("/usr/local/pkg/" . $pkg_name)) {

				$depend_name = reverse_strrchr($depend_file, "."); // Strip filename down to (guessed) dependency name.

				log_error("Fetching missing dependency \(" . $depend_name . "\) for " . $pkg_name);

				mwexec("/usr/bin/fetch -o /usr/local/pkg/" . $depend_file . " " . $item['item']);

			}

			$depends[] = $depend_file;

		}

	}

	return $depends;

}