Method start

src/jrd/svc.cpp:1968–2178

void Service::start(USHORT spb_length, const UCHAR* spb_data)
{
	ExistenceGuard guard(this, FB_FUNCTION);

	if (svc_flags & SVC_detached)
	{
		// Service was already detached
		Arg::Gds(isc_bad_svc_handle).raise();
	}

	try
	{
	if (!svcShutdown)
		svc_shutdown_request = svc_shutdown_in_progress = false;

	ClumpletReader spb(ClumpletReader::SpbStart, spb_data, spb_length);

	// The name of the service is the first element of the buffer
	if (spb.isEof())
	{
		status_exception::raise(Arg::Gds(isc_service_att_err) << Arg::Gds(isc_spb_no_id));
	}
	const UCHAR svc_id = spb.getClumpTag();
	const serv_entry* serv;
	for (serv = services; serv->serv_action; serv++)
	{
		if (serv->serv_action == svc_id)
			break;
	}

	if (!serv->serv_name)
		status_exception::raise(Arg::Gds(isc_service_att_err) << Arg::Gds(isc_service_not_supported));

	svc_service_run = serv;

	// currently we do not use "anonymous" service for any purposes but isc_service_query()
	if (svc_user_flag == SVC_user_none)
	{
		status_exception::raise(Arg::Gds(isc_bad_spb_form) <<
								Arg::Gds(isc_svc_start_failed));
	}

	if (!(svc_flags & SVC_finished))
		status_exception::raise(Arg::Gds(isc_svc_in_use) << Arg::Str(serv->serv_name));

	// Another service may have been started with this service block.
	// If so, we must reset the service flags.
	svc_switches.erase();
	/***
	if (!(svc_flags & SVC_detached))
	{
		svc_flags = 0;
	}
	***/

	if (!svc_perm_sw.hasData())
	{
		// If svc_perm_sw is not used -- call a command-line parsing utility