/* Copyright (C) 1994-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <hurd.h>

#include <hurd/fd.h>

#include <hurd/signal.h>

#include <hurd/term.h>

#include <fcntl.h>

/* Store PORT in file descriptor D, doing appropriate ctty magic.

   FLAGS are as for `open'; only O_IGNORE_CTTY and O_CLOEXEC are meaningful.

   D should be locked, and will not be unlocked.  */

void

_hurd_port2fd (struct hurd_fd *d, io_t dport, int flags)

{

  mach_port_t cttyid;

  io_t ctty = MACH_PORT_NULL;

  if (!(flags & O_IGNORE_CTTY))

    __USEPORT (CTTYID,

	       ({

		 if (port != MACH_PORT_NULL && /* Do we have a ctty? */

		     ! __term_getctty (dport, &cttyid))	/* Could this be it? */

		   {

		     __mach_port_deallocate (__mach_task_self (), cttyid);

		     /* This port is capable of being a controlling tty.

			Is it ours?  */

		     if (cttyid == port)

		       __term_open_ctty (dport, _hurd_pid, _hurd_pgrp, &ctty);

		     /* XXX if this port is our ctty, but we are not doing

			ctty style i/o because term_become_ctty barfed,

			what to do?  */

		   }

		 0;

	       }));

  /* Install PORT in the descriptor cell, leaving it locked.  */

  {

    mach_port_t old

      = _hurd_userlink_clear (&d->port.users) ? d->port.port : MACH_PORT_NULL;

    d->port.port = dport;

    d->flags = (flags & O_CLOEXEC) ? FD_CLOEXEC : 0;

    if (old != MACH_PORT_NULL)

      __mach_port_deallocate (__mach_task_self (), old);

  }

  _hurd_port_set (&d->ctty, ctty);

}