PhabricatorDaemon.php
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	<?php

	abstract class PhabricatorDaemon extends PhutilDaemon {

	protected function willRun() {
	parent::willRun();

	$phabricator = phutil_get_library_root('phabricator');
	$root = dirname($phabricator);
	require_once $root.'/scripts/__init_script__.php';
	}

	protected function willSleep($duration) {
	LiskDAO::closeAllConnections();
	return;
	}

	public function getViewer() {
	return PhabricatorUser::getOmnipotentUser();
	}


	/**
	* Format a command so it executes as the daemon user, if a daemon user is
	* defined. This wraps the provided command in `sudo -u ...`, roughly.
	*
	* @param PhutilCommandString Command to execute.
	* @return PhutilCommandString `sudo` version of the command.
	*/
	public static function sudoCommandAsDaemonUser($command) {
	$user = PhabricatorEnv::getEnvConfig('phd.user');
	if (!$user) {
	// No daemon user is set, so just run this as ourselves.
	return $command;
	}

	// Get the absolute path so we're safe against the caller wiping out
	// PATH.
	$sudo = Filesystem::resolveBinary('sudo');
	if (!$sudo) {
	throw new Exception(pht("Unable to find 'sudo'!"));
	}

	// Flags here are:
	//
	// -E: Preserve the environment.
	// -n: Non-interactive. Exit with an error instead of prompting.
	// -u: Which user to sudo to.

	return csprintf('%s -E -n -u %s -- %C', $sudo, $user, $command);
	}

	}