Function SysInterfaceConnect

Kernel/src/arch/x86_64/syscalls.cpp:2341–2378

//////////////////////// \brief SysInterfaceConnect (path) - Open a connection to an interface Open a new connection on an interface and return a new MessageEndpoint \param interface (const char*) Path of interface in format servicename/interfacename (e.g. lemon.lemonwm/wm) \return Handle ID of endpoint on success, negative error code on failure ////////////////////////

/// \return Handle ID of endpoint on success, negative error code on failure
/////////////////////////////
long SysInterfaceConnect(regs64_t* r){
	process_t* currentProcess = Scheduler::GetCurrentProcess();

	size_t sz = 0;
	if(strlenSafe(reinterpret_cast<const char*>(SC_ARG0(r)), sz, currentProcess->addressSpace)){
		return -EFAULT;
	}

	char path[sz + 1];
	strncpy(path, reinterpret_cast<const char*>(SC_ARG0(r)), sz);
	path[sz] = 0;

	if(!strchr(path, '/')){ // Interface name given by '/' separator
		Log::Warning("SysInterfaceConnect: No interface name given!");
		return -EINVAL;
	}

	FancyRefPtr<MessageInterface> interface;
	{
		FancyRefPtr<Service> svc;
		if(ServiceFS::Instance()->ResolveServiceName(svc, path)){
			return -ENOENT; // No such service
		}
	
		if(svc->ResolveInterface(interface, strchr(path, '/') + 1)){
			return -ENOENT; // No such interface
		}
	}

	FancyRefPtr<MessageEndpoint> endp = interface->Connect();
	if(!endp.get()){
		return -EINVAL; // Some error connecting, interface destroyed? 
	}
	
	Handle& handle = Scheduler::RegisterHandle(currentProcess, static_pointer_cast<KernelObject>(endp));

	return handle.id;
}

/////////////////////////////
/// \brief SysEndpointQueue (endpoint, id, size, data) - Queue a message on an endpoint