1/*-
2 * Copyright (c) 2003 Poul-Henning Kamp. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
| 1/*-
2 * Copyright (c) 2003 Poul-Henning Kamp. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
|
25 * $FreeBSD: head/sys/kern/tty_tty.c 110093 2003-01-30 12:51:32Z phk $
| 25 * $FreeBSD: head/sys/kern/tty_tty.c 111815 2003-03-03 12:15:54Z phk $
|
26 */
27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/conf.h>
31#include <sys/kernel.h>
32#include <sys/proc.h>
33#include <sys/vnode.h>
34
35static d_open_t cttyopen;
36
37#define CDEV_MAJOR 1
38
39static struct cdevsw ctty_cdevsw = {
| 26 */
27
28#include <sys/param.h>
29#include <sys/systm.h>
30#include <sys/conf.h>
31#include <sys/kernel.h>
32#include <sys/proc.h>
33#include <sys/vnode.h>
34
35static d_open_t cttyopen;
36
37#define CDEV_MAJOR 1
38
39static struct cdevsw ctty_cdevsw = {
|
40 /* open */ cttyopen,
41 /* close */ nullclose,
42 /* read */ noread,
43 /* write */ nowrite,
44 /* ioctl */ noioctl,
45 /* poll */ nopoll,
46 /* mmap */ nommap,
47 /* strategy */ nostrategy,
48 /* name */ "ctty",
49 /* maj */ CDEV_MAJOR,
50 /* dump */ nodump,
51 /* psize */ nopsize,
52 /* flags */ D_TTY,
| 40 .d_open = cttyopen,
41 .d_close = nullclose,
42 .d_name = "ctty",
43 .d_maj = CDEV_MAJOR,
44 .d_flags = D_TTY,
|
53};
54
55static dev_t ctty;
56
57static int
58cttyopen(dev_t dev, int flag, int mode, struct thread *td)
59{
60
61 return (ENXIO);
62}
63
64static void
65ctty_clone(void *arg, char *name, int namelen, dev_t *dev)
66{
67
68 if (*dev != NODEV)
69 return;
70 if (strcmp(name, "tty"))
71 return;
72 if (!(curthread->td_proc->p_flag & P_CONTROLT))
73 *dev = ctty;
74 else if (curthread->td_proc->p_session->s_ttyvp == NULL)
75 *dev = ctty;
76 else
77 *dev = curthread->td_proc->p_session->s_ttyvp->v_rdev;
78}
79
80static void
81ctty_drvinit(void *unused)
82{
83
84 EVENTHANDLER_REGISTER(dev_clone, ctty_clone, 0, 1000);
85 ctty = make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "ctty");
86}
87
88SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ctty_drvinit,NULL)
| 45};
46
47static dev_t ctty;
48
49static int
50cttyopen(dev_t dev, int flag, int mode, struct thread *td)
51{
52
53 return (ENXIO);
54}
55
56static void
57ctty_clone(void *arg, char *name, int namelen, dev_t *dev)
58{
59
60 if (*dev != NODEV)
61 return;
62 if (strcmp(name, "tty"))
63 return;
64 if (!(curthread->td_proc->p_flag & P_CONTROLT))
65 *dev = ctty;
66 else if (curthread->td_proc->p_session->s_ttyvp == NULL)
67 *dev = ctty;
68 else
69 *dev = curthread->td_proc->p_session->s_ttyvp->v_rdev;
70}
71
72static void
73ctty_drvinit(void *unused)
74{
75
76 EVENTHANDLER_REGISTER(dev_clone, ctty_clone, 0, 1000);
77 ctty = make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "ctty");
78}
79
80SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ctty_drvinit,NULL)
|