/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* Copyright (c) 1997 Apple Computer, Inc. All Rights Reserved */ /*- * 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 */ /* * Indirect driver for controlling tty. */ #include <sys/param.h> #include <sys/systm.h> #include <sys/conf.h> #include <sys/ioctl.h> #include <sys/proc_internal.h> #include <sys/tty.h> #include <sys/vnode_internal.h> #include <sys/file_internal.h> #ifndef NeXT #include <sys/kernel.h> #ifdef DEVFS #include <sys/devfsext.h> #endif /*DEVFS*/ static d_open_t cttyopen; static d_read_t cttyread; static d_write_t cttywrite; static d_ioctl_t cttyioctl; static d_select_t cttyselect; #endif /* !NeXT */ /* Forward declarations for cdevsw[] entry */ /* XXX we should consider making these static */ int cttyopen(dev_t dev, int flag, int mode, struct proc *p); int cttyread(dev_t dev, struct uio *uio, int flag); int cttywrite(dev_t dev, struct uio *uio, int flag); int cttyioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p); int cttyselect(dev_t dev, int flag, void* wql, struct proc *p); #ifndef NeXT #define CDEV_MAJOR 1 /* Don't make static, fdesc_vnops uses this. */ struct cdevsw ctty_cdevsw = { cttyopen, nullclose, cttyread, cttywrite, /*1*/ cttyioctl, nullstop, nullreset, nodevtotty,/* tty */ cttyselect, nommap, NULL, "ctty", NULL, -1 }; #endif /* !NeXT */ #define cttyvp(p) ((p)->p_flag & P_CONTROLT ? (p)->p_session->s_ttyvp : NULL) /*ARGSUSED*/ int cttyopen(__unused dev_t dev, int flag, __unused int mode, struct proc *p) { struct vnode *ttyvp = cttyvp(p); struct vfs_context context; int error; if (ttyvp == NULL) return (ENXIO); context.vc_proc = p; context.vc_ucred = p->p_ucred; error = VNOP_OPEN(ttyvp, flag, &context); return (error); } /*ARGSUSED*/ int cttyread(__unused dev_t dev, struct uio *uio, int flag) { struct proc *p = current_proc(); register struct vnode *ttyvp = cttyvp(p); struct vfs_context context; int error; if (ttyvp == NULL) return (EIO); context.vc_proc = p; context.vc_ucred = NOCRED; error = VNOP_READ(ttyvp, uio, flag, &context); return (error); } /*ARGSUSED*/ int cttywrite(__unused dev_t dev, struct uio *uio, int flag) { struct proc *p = current_proc(); register struct vnode *ttyvp = cttyvp(p); struct vfs_context context; int error; if (ttyvp == NULL) return (EIO); context.vc_proc = p; context.vc_ucred = NOCRED; error = VNOP_WRITE(ttyvp, uio, flag, &context); return (error); } /*ARGSUSED*/ #ifndef NeXT static int cttyioctl(dev, cmd, addr, flag, p) dev_t dev; int cmd; caddr_t addr; int flag; struct proc *p; #else int cttyioctl(__unused dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) #endif /* !NeXT */ { struct vnode *ttyvp = cttyvp(p); struct vfs_context context; 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) { if (!SESS_LEADER(p)) { p->p_flag &= ~P_CONTROLT; return (0); } else return (EINVAL); } context.vc_proc = p; context.vc_ucred = NOCRED; return (VNOP_IOCTL(ttyvp, cmd, addr, flag, &context)); } /*ARGSUSED*/ int cttyselect(__unused dev_t dev, int flag, void* wql, struct proc *p) { struct vnode *ttyvp = cttyvp(p); struct vfs_context context; context.vc_proc = p; context.vc_ucred = NOCRED; if (ttyvp == NULL) return (1); /* try operation to get EOF/failure */ return (VNOP_SELECT(ttyvp, flag, FREAD|FWRITE, wql, &context)); } #ifndef NeXT static ctty_devsw_installed = 0; #ifdef DEVFS static void *ctty_devfs_token; #endif static void ctty_drvinit(void *unused) { dev_t dev; if( ! ctty_devsw_installed ) { dev = makedev(CDEV_MAJOR,0); cdevsw_add(&dev,&ctty_cdevsw,NULL); ctty_devsw_installed = 1; #ifdef DEVFS ctty_devfs_token = devfs_add_devswf(&ctty_cdevsw, 0, DV_CHR, 0, 0, 0666, "tty"); #endif } } SYSINIT(cttydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ctty_drvinit,NULL) #endif /* !NeXT */