xref: /haiku/src/system/libroot/os/launch.cpp (revision ef462ab57f0ba739629194e6c071815d521c7955)

/*
 * Copyright 2015, Axel Dörfler, axeld@pinc-software.de.
 * Distributed under the terms of the MIT License.
 */


#include <launch.h>

#include <TokenSpace.h>
#include <util/KMessage.h>


static port_id sLaunchDaemonPort = -1;


port_id
BPrivate::get_launch_daemon_port()
{
	if (sLaunchDaemonPort < 0) {
		sLaunchDaemonPort = find_port(B_LAUNCH_DAEMON_PORT_NAME);

		port_info info;
		if (get_port_info(sLaunchDaemonPort, &info) == B_OK
			&& info.team == find_thread(NULL)) {
			// Make sure that the launch_daemon doesn't wait on itself
			sLaunchDaemonPort = -1;
			return -1;
		}
	}

	return sLaunchDaemonPort;
}


status_t
BPrivate::send_request_to_launch_daemon(KMessage& request, KMessage& reply)
{
	status_t status = request.SendTo(get_launch_daemon_port(),
		B_PREFERRED_TOKEN, &reply);
	if (status != B_OK)
		return status;

	return (status_t)reply.What();
}


status_t
BPrivate::get_launch_data(const char* signature, KMessage& data)
{
	BPrivate::KMessage request(B_GET_LAUNCH_DATA);
	request.AddString("name", signature);

	return BPrivate::send_request_to_launch_daemon(request, data);
}