1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/* 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);
}
|
