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76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
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/* Copyright (C) 1994 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <hurd.h>
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#include <hurd/fd.h>
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#include <hurd/signal.h>
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#include <hurd/term.h>
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#include <fcntl.h>
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/* Store PORT in file descriptor D, doing appropriate ctty magic.
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FLAGS are as for `open'; only O_IGNORE_CTTY is meaningful.
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D should be locked, and will not be unlocked. */
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void
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_hurd_port2fd (struct hurd_fd *d, io_t port, int flags)
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{
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io_t ctty;
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mach_port_t cttyid;
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int is_ctty = !(flags & O_IGNORE_CTTY) && ! __term_getctty (port, &cttyid);
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if (is_ctty)
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{
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/* This port is capable of being a controlling tty.
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Is it ours? */
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struct hurd_port *const id = &_hurd_ports[INIT_PORT_CTTYID];
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__spin_lock (&id->lock);
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if (id->port == MACH_PORT_NULL)
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/* We have no controlling tty, so make this one it. */
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_hurd_port_locked_set (id, cttyid);
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else
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{
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if (cttyid != id->port)
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/* We have a controlling tty and this is not it. */
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is_ctty = 0;
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/* Either we don't want CTTYID, or ID->port already is it.
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So we don't need to change ID->port, and we can release
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the reference to CTTYID. */
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__spin_unlock (&id->lock);
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__mach_port_deallocate (__mach_task_self (), cttyid);
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}
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}
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if (!is_ctty || __term_open_ctty (port, _hurd_pid, _hurd_pgrp, &ctty) != 0)
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/* XXX if IS_CTTY, then this port is our ctty, but we are
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not doing ctty style i/o because term_become_ctty barfed.
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What to do? */
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/* No ctty magic happening here. */
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ctty = MACH_PORT_NULL;
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/* Install PORT in the descriptor cell, leaving it locked. */
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{
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mach_port_t old
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= _hurd_userlink_clear (&d->port.users) ? d->port.port : MACH_PORT_NULL;
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d->port.port = port;
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if (old != MACH_PORT_NULL)
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__mach_port_deallocate (__mach_task_self (), old);
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}
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_hurd_port_set (&d->ctty, ctty);
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}
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