Message idea

typedef struct
{
    message_t msg;
    char *port_name;
    int handle;
} port_open_reply_t;

port_open("/port/glsrv");
port_open("/port/sndsrv");

int gl_port = 0, snd_port = 0;
while(1)
{
    message_t *msg = msg_recv();
    switch (msg->code)
    {
    case OPEN_ACCEPT:
        port_open_reply_t *open_reply = (port_open_reply_t*) msg;
        if (open_reply->port_name[6] == 'g') gl_port = open_reply->handle;
        else if (open_reply->port_name[6] == 's') snd_port = open_reply->handle;
        break;
    case OPEN_DENY:
        port_open_reply_t *open_reply = (port_open_reply_t*) msg;
        printf("Unable to open %s\n", open_reply->port_name);
        exit(1);
        break;
    default:
    }
}