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port2fd.c

/* Copyright (C) 1994, 1997, 1999 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#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 is 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 = 0;
    if (old != MACH_PORT_NULL)
      __mach_port_deallocate (__mach_task_self (), old);
  }

  _hurd_port_set (&d->ctty, ctty);
}

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