76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/* Copyright (C) 1994 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, 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 port, int flags)
|
|
{
|
|
io_t ctty;
|
|
mach_port_t cttyid;
|
|
int is_ctty = !(flags & O_IGNORE_CTTY) && ! __term_getctty (port, &cttyid);
|
|
|
|
if (is_ctty)
|
|
{
|
|
/* This port is capable of being a controlling tty.
|
|
Is it ours? */
|
|
struct hurd_port *const id = &_hurd_ports[INIT_PORT_CTTYID];
|
|
__spin_lock (&id->lock);
|
|
if (id->port == MACH_PORT_NULL)
|
|
/* We have no controlling tty, so make this one it. */
|
|
_hurd_port_locked_set (id, cttyid);
|
|
else
|
|
{
|
|
if (cttyid != id->port)
|
|
/* We have a controlling tty and this is not it. */
|
|
is_ctty = 0;
|
|
/* Either we don't want CTTYID, or ID->port already is it.
|
|
So we don't need to change ID->port, and we can release
|
|
the reference to CTTYID. */
|
|
__spin_unlock (&id->lock);
|
|
__mach_port_deallocate (__mach_task_self (), cttyid);
|
|
}
|
|
}
|
|
|
|
if (!is_ctty || __term_open_ctty (port, _hurd_pid, _hurd_pgrp, &ctty) != 0)
|
|
/* XXX if IS_CTTY, then this port is our ctty, but we are
|
|
not doing ctty style i/o because term_become_ctty barfed.
|
|
What to do? */
|
|
/* No ctty magic happening here. */
|
|
ctty = MACH_PORT_NULL;
|
|
|
|
/* 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 = port;
|
|
if (old != MACH_PORT_NULL)
|
|
__mach_port_deallocate (__mach_task_self (), old);
|
|
}
|
|
|
|
_hurd_port_set (&d->ctty, ctty);
|
|
}
|