Function box_exit

isolate.c:256–313

}

static void NONRET
box_exit(int rc)
{
  if (proxy_pid > 0)
    {
      if (box_pid > 0)
	{
	  kill(-box_pid, SIGKILL);
	  kill(box_pid, SIGKILL);
	}
      if (cg_enable)
	{
	  /*
	   *  In non-CG mode, we must not kill the proxy explicitly.
	   *  This is important, because the proxy could exit before the box
	   *  completes its exit, causing rusage of the box to be lost.
	   *
	   *  In CG mode, we must kill the proxy, because it is the init
	   *  process of the CG and killing it causes all other processes
	   *  inside the CG to be killed. However, we do not care about
	   *  rusage.
	   */
	  kill(-proxy_pid, SIGKILL);
	  kill(proxy_pid, SIGKILL);
	}
      meta_printf("killed:1\n");

      /*
       *  The rusage will contain time spent by the proxy and its children (i.e., the box).
       *  (See comments on killing of the proxy above, though.)
       */
      struct rusage rus;
      int p, stat;
      do
	p = wait4(proxy_pid, &stat, 0, &rus);
      while (p < 0 && errno == EINTR);
      if (p < 0)
	fprintf(stderr, "UGH: Lost track of the process (%m)\n");
      else
	final_stats(&rus);
    }

  if (tty_hack && isatty(1))
    {
      /*
       *  If stdout is a tty, make us the foreground process group again.
       *  We do not need it (we ignore SIGTTOU anyway), but programs executed
       *  after our exit will.
       */
      tcsetpgrp(1, getpgrp());
    }

  if (rc < 2 && cleanup_ownership)
    chowntree("box", orig_uid, orig_gid, special_files);

  meta_close();
  exit(rc);
}