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 *
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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 $
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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 = {
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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,
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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)
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