pipe1

byte lart_init_runtime(){
  int host_pipes[2];
  int remote_pipes[2];
  pipe(host_pipes);
  pipe(remote_pipes);

  lart()->mpid  = getpid();
  pid_t pid     = fork();
  if (pid==0){
    /* system ui */
    lart()->spid = getpid();
    lart()->rfd  = remote_pipes[0];
    lart()->wfd  = host_pipes[1];
    close(remote_pipes[1]);
    close(host_pipes[0]);
    return 2; /* sysui process */
  }
  else if (pid){
    lart()->spid = pid;
    lart()->rfd  = host_pipes[0];
    lart()->wfd  = remote_pipes[1];
    close(host_pipes[1]);
    close(remote_pipes[0]);
    return 1; /* manager process */
  }
  return 0; /* failed */
}