ssh-exec.php
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ssh-exec.php
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	#!/usr/bin/env php
	<?php

	$root = dirname(dirname(dirname(__FILE__)));
	require_once $root.'/scripts/__init_script__.php';

	// First, figure out the authenticated user.
	$args = new PhutilArgumentParser($argv);
	$args->setTagline('receive SSH requests');
	$args->setSynopsis(<<<EOSYNOPSIS
	ssh-exec --phabricator-ssh-user __user__ [--ssh-command __commmand__]
	Receive SSH requests.
	EOSYNOPSIS
	);

	$args->parse(
	array(
	array(
	'name' => 'phabricator-ssh-user',
	'param' => 'username',
	),
	array(
	'name' => 'ssh-command',
	'param' => 'command',
	),
	));

	try {
	$user_name = $args->getArg('phabricator-ssh-user');
	if (!strlen($user_name)) {
	throw new Exception("No username.");
	}

	$user = id(new PhabricatorUser())->loadOneWhere(
	'userName = %s',
	$user_name);
	if (!$user) {
	throw new Exception("Invalid username.");
	}

	if ($user->getIsDisabled()) {
	throw new Exception("You have been exiled.");
	}

	if ($args->getArg('ssh-command')) {
	$original_command = $args->getArg('ssh-command');
	} else {
	$original_command = getenv('SSH_ORIGINAL_COMMAND');
	}

	// Now, rebuild the original command.
	$original_argv = id(new PhutilShellLexer())
	->splitArguments($original_command);
	if (!$original_argv) {
	throw new Exception("No interactive logins.");
	}
	$command = head($original_argv);
	array_unshift($original_argv, 'phabricator-ssh-exec');

	$original_args = new PhutilArgumentParser($original_argv);

	$workflows = array(
	new ConduitSSHWorkflow(),
	);

	$workflow_names = mpull($workflows, 'getName', 'getName');
	if (empty($workflow_names[$command])) {
	throw new Exception("Invalid command.");
	}

	$workflow = $original_args->parseWorkflows($workflows);
	$workflow->setUser($user);

	$sock_stdin = fopen('php://stdin', 'r');
	if (!$sock_stdin) {
	throw new Exception("Unable to open stdin.");
	}

	$sock_stdout = fopen('php://stdout', 'w');
	if (!$sock_stdout) {
	throw new Exception("Unable to open stdout.");
	}

	$socket_channel = new PhutilSocketChannel(
	$sock_stdin,
	$sock_stdout);
	$metrics_channel = new PhutilMetricsChannel($socket_channel);
	$workflow->setIOChannel($metrics_channel);

	$err = $workflow->execute($original_args);

	$metrics_channel->flush();
	} catch (Exception $ex) {
	echo "phabricator-ssh-exec: ".$ex->getMessage()."\n";
	exit(1);
	}

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