diff options
Diffstat (limited to 'sys/kern/tty_tty.c')
| -rw-r--r-- | sys/kern/tty_tty.c | 282 |
1 files changed, 0 insertions, 282 deletions
diff --git a/sys/kern/tty_tty.c b/sys/kern/tty_tty.c index 88f4222..52fc4db 100644 --- a/sys/kern/tty_tty.c +++ b/sys/kern/tty_tty.c @@ -1,4 +1,3 @@ -#ifndef NODEVFS /*- * Copyright (c) 2003 Poul-Henning Kamp. All rights reserved. * @@ -87,284 +86,3 @@ ctty_drvinit(void *unused) } SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ctty_drvinit,NULL) -#else -/*- - * Copyright (c) 1982, 1986, 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)tty_tty.c 8.2 (Berkeley) 9/23/93 - * $FreeBSD$ - */ - -/* - * Indirect driver for controlling tty. - */ - -#include "opt_mac.h" - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/conf.h> -#include <sys/kernel.h> -#include <sys/lock.h> -#include <sys/mac.h> -#include <sys/mutex.h> -#include <sys/sx.h> -#include <sys/proc.h> -#include <sys/ttycom.h> -#include <sys/vnode.h> - -static d_open_t cttyopen; -static d_read_t cttyread; -static d_write_t cttywrite; -static d_ioctl_t cttyioctl; -static d_poll_t cttypoll; - -#define CDEV_MAJOR 1 - -static struct cdevsw ctty_cdevsw = { - /* open */ cttyopen, - /* close */ nullclose, - /* read */ cttyread, - /* write */ cttywrite, - /* ioctl */ cttyioctl, - /* poll */ cttypoll, - /* mmap */ nommap, - /* strategy */ nostrategy, - /* name */ "ctty", - /* maj */ CDEV_MAJOR, - /* dump */ nodump, - /* psize */ nopsize, - /* flags */ D_TTY, -}; - -#define cttyvp(td) ((td)->td_proc->p_flag & P_CONTROLT ? (td)->td_proc->p_session->s_ttyvp : NULL) - -/*ARGSUSED*/ -static int -cttyopen(dev, flag, mode, td) - dev_t dev; - int flag, mode; - struct thread *td; -{ - struct vnode *ttyvp; - int error; - - PROC_LOCK(td->td_proc); - SESS_LOCK(td->td_proc->p_session); - ttyvp = cttyvp(td); - SESS_UNLOCK(td->td_proc->p_session); - PROC_UNLOCK(td->td_proc); - - if (ttyvp == NULL) - return (ENXIO); - vn_lock(ttyvp, LK_EXCLUSIVE | LK_RETRY, td); -#ifdef MAC - error = mac_check_vnode_open(td->td_ucred, ttyvp, flag); - if (error) { - VOP_UNLOCK(ttyvp, 0, td); - return (error); - } -#endif - /* XXX: Shouldn't this cred be td->td_ucred not NOCRED? */ - error = VOP_OPEN(ttyvp, flag, NOCRED, td); - VOP_UNLOCK(ttyvp, 0, td); - return (error); -} - -/*ARGSUSED*/ -static int -cttyread(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ - struct thread *td = uio->uio_td; - register struct vnode *ttyvp; - int error; - - PROC_LOCK(td->td_proc); - SESS_LOCK(td->td_proc->p_session); - ttyvp = cttyvp(td); - SESS_UNLOCK(td->td_proc->p_session); - PROC_UNLOCK(td->td_proc); - - if (ttyvp == NULL) - return (EIO); - vn_lock(ttyvp, LK_EXCLUSIVE | LK_RETRY, td); -#ifdef MAC - error = mac_check_vnode_read(td->td_ucred, NOCRED, ttyvp); - if (error == 0) -#endif - /* XXX: Shouldn't this cred be td->td_ucred not NOCRED? */ - error = VOP_READ(ttyvp, uio, flag, NOCRED); - VOP_UNLOCK(ttyvp, 0, td); - return (error); -} - -/*ARGSUSED*/ -static int -cttywrite(dev, uio, flag) - dev_t dev; - struct uio *uio; - int flag; -{ - struct thread *td = uio->uio_td; - struct vnode *ttyvp; - struct mount *mp; - int error; - - PROC_LOCK(td->td_proc); - SESS_LOCK(td->td_proc->p_session); - ttyvp = cttyvp(td); - SESS_UNLOCK(td->td_proc->p_session); - PROC_UNLOCK(td->td_proc); - - if (ttyvp == NULL) - return (EIO); - mp = NULL; - if (ttyvp->v_type != VCHR && - (error = vn_start_write(ttyvp, &mp, V_WAIT | PCATCH)) != 0) - return (error); - vn_lock(ttyvp, LK_EXCLUSIVE | LK_RETRY, td); -#ifdef MAC - error = mac_check_vnode_write(td->td_ucred, NOCRED, ttyvp); - if (error == 0) -#endif - /* XXX: shouldn't this cred be td->td_ucred not NOCRED? */ - error = VOP_WRITE(ttyvp, uio, flag, NOCRED); - VOP_UNLOCK(ttyvp, 0, td); - vn_finished_write(mp); - return (error); -} - -/*ARGSUSED*/ -static int -cttyioctl(dev, cmd, addr, flag, td) - dev_t dev; - u_long cmd; - caddr_t addr; - int flag; - struct thread *td; -{ - struct vnode *ttyvp; - int error; - - PROC_LOCK(td->td_proc); - SESS_LOCK(td->td_proc->p_session); - ttyvp = cttyvp(td); - SESS_UNLOCK(td->td_proc->p_session); - PROC_UNLOCK(td->td_proc); - - if (ttyvp == NULL) - return (EIO); - if (cmd == TIOCSCTTY) /* don't allow controlling tty to be set */ - return EINVAL; /* to controlling tty -- infinite recursion */ - if (cmd == TIOCNOTTY) { - PROC_LOCK(td->td_proc); - SESS_LOCK(td->td_proc->p_session); - error = 0; - if (!SESS_LEADER(td->td_proc)) - td->td_proc->p_flag &= ~P_CONTROLT; - else - error = EINVAL; - SESS_UNLOCK(td->td_proc->p_session); - PROC_UNLOCK(td->td_proc); - return (error); - } - /* XXXMAC: Should this be td->td_ucred below? */ - return (VOP_IOCTL(ttyvp, cmd, addr, flag, NOCRED, td)); -} - -/*ARGSUSED*/ -static int -cttypoll(dev, events, td) - dev_t dev; - int events; - struct thread *td; -{ - struct vnode *ttyvp; -#ifdef MAC - int error; -#endif - - PROC_LOCK(td->td_proc); - SESS_LOCK(td->td_proc->p_session); - ttyvp = cttyvp(td); - SESS_UNLOCK(td->td_proc->p_session); - PROC_UNLOCK(td->td_proc); - - if (ttyvp == NULL) - /* try operation to get EOF/failure */ - return (seltrue(dev, events, td)); -#ifdef MAC - vn_lock(ttyvp, LK_EXCLUSIVE | LK_RETRY, td); - error = mac_check_vnode_poll(td->td_ucred, NOCRED, ttyvp); - VOP_UNLOCK(ttyvp, 0, td); - if (error) - return (error); -#endif - return (VOP_POLL(ttyvp, events, td->td_ucred, td)); -} - -static void ctty_clone(void *arg, char *name, int namelen, dev_t *dev); - -static dev_t ctty; - -static void -ctty_clone(void *arg, char *name, int namelen, dev_t *dev) -{ - struct vnode *vp; - - if (*dev != NODEV) - return; - if (strcmp(name, "tty")) - return; - vp = cttyvp(curthread); - if (vp == NULL) { - if (ctty) - *dev = ctty; - } else - *dev = vp->v_rdev; -} - - -static void ctty_drvinit(void *unused); -static void -ctty_drvinit(unused) - void *unused; -{ - - make_dev(&ctty_cdevsw, 0, 0, 0, 0666, "tty"); -} - -SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ctty_drvinit,NULL) -#endif |
