Deleted Added
full compact
tty_tty.c (142709) tty_tty.c (144389)
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
26#include <sys/cdefs.h>
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
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sys/kern/tty_tty.c 142709 2005-02-27 22:02:03Z phk $");
27__FBSDID("$FreeBSD: head/sys/kern/tty_tty.c 144389 2005-03-31 12:19:44Z phk $");
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/conf.h>
32#include <sys/kernel.h>
33#include <sys/proc.h>
34#include <sys/vnode.h>
35
36static d_open_t cttyopen;
37
38static struct cdevsw ctty_cdevsw = {
39 .d_version = D_VERSION,
40 .d_open = cttyopen,
41 .d_name = "ctty",
42 .d_flags = D_TTY | D_NEEDGIANT,
43};
44
45static struct cdev *ctty;
46
47static int
48cttyopen(struct cdev *dev, int flag, int mode, struct thread *td)
49{
50
51 return (ENXIO);
52}
53
54static void
55ctty_clone(void *arg, char *name, int namelen, struct cdev **dev)
56{
57
58 if (*dev != NULL)
59 return;
60 if (strcmp(name, "tty"))
61 return;
62 if (!(curthread->td_proc->p_flag & P_CONTROLT))
63 *dev = ctty;
64 else if (curthread->td_proc->p_session->s_ttyvp == NULL)
65 *dev = ctty;
66 else
67 *dev = curthread->td_proc->p_session->s_ttyvp->v_rdev;
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/conf.h>
32#include <sys/kernel.h>
33#include <sys/proc.h>
34#include <sys/vnode.h>
35
36static d_open_t cttyopen;
37
38static struct cdevsw ctty_cdevsw = {
39 .d_version = D_VERSION,
40 .d_open = cttyopen,
41 .d_name = "ctty",
42 .d_flags = D_TTY | D_NEEDGIANT,
43};
44
45static struct cdev *ctty;
46
47static int
48cttyopen(struct cdev *dev, int flag, int mode, struct thread *td)
49{
50
51 return (ENXIO);
52}
53
54static void
55ctty_clone(void *arg, char *name, int namelen, struct cdev **dev)
56{
57
58 if (*dev != NULL)
59 return;
60 if (strcmp(name, "tty"))
61 return;
62 if (!(curthread->td_proc->p_flag & P_CONTROLT))
63 *dev = ctty;
64 else if (curthread->td_proc->p_session->s_ttyvp == NULL)
65 *dev = ctty;
66 else
67 *dev = curthread->td_proc->p_session->s_ttyvp->v_rdev;
68 dev_ref(*dev);
68}
69
70static void
71ctty_drvinit(void *unused)
72{
73
74 EVENTHANDLER_REGISTER(dev_clone, ctty_clone, 0, 1000);
75 ctty = make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "ctty");
76}
77
78SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE,ctty_drvinit,NULL)
69}
70
71static void
72ctty_drvinit(void *unused)
73{
74
75 EVENTHANDLER_REGISTER(dev_clone, ctty_clone, 0, 1000);
76 ctty = make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "ctty");
77}
78
79SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE,ctty_drvinit,NULL)