/* * Copyright (c) 1997-2013 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_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. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * 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_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1982, 1986, 1989, 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_pty.c 8.4 (Berkeley) 2/20/95 */ /* * Pseudo-teletype Driver * (Actually two drivers, requiring two entries in 'cdevsw') */ #include "pty.h" /* XXX */ #include <sys/param.h> #include <sys/systm.h> #include <sys/ioctl.h> #include <sys/proc_internal.h> #include <sys/kauth.h> #include <sys/tty.h> #include <sys/conf.h> #include <sys/file_internal.h> #include <sys/uio_internal.h> #include <sys/kernel.h> #include <sys/vnode.h> #include <sys/user.h> #include <sys/signalvar.h> #if CONFIG_MACF #include <security/mac_framework.h> #endif #include "tty_dev.h" #if NPTY == 1 #undef NPTY #define NPTY 32 /* crude XXX */ #warning You have only one pty defined, redefining to 32. #endif #define PTY_MAJOR 5 #define TTY_MAJOR 4 /* * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] */ static struct ptmx_ioctl pt_ioctl[NPTY]; int pty_init(int n_ptys); #ifndef DEVFS int pty_init(__unused int n_ptys) { return 0; } #else // DEVFS #include <miscfs/devfs/devfs.h> #define START_CHAR 'p' #define HEX_BASE 16 static struct tty_dev_t _pty_driver; static struct ptmx_ioctl * pty_get_ioctl(int minor, int open_flag) { if (minor >= NPTY) { return NULL; } struct ptmx_ioctl *pti = &pt_ioctl[minor]; if (open_flag & (PF_OPEN_M|PF_OPEN_S)) { if (!pti->pt_tty) { pti->pt_tty = ttymalloc(); } if (!pti->pt_tty) { return NULL; } } return pti; } static int pty_get_name(int minor, char *buffer, size_t size) { return snprintf(buffer, size, "/dev/tty%c%x", START_CHAR + (minor / HEX_BASE), minor % HEX_BASE); } int pty_init(int n_ptys) { int i; int j; n_ptys = min(n_ptys, NPTY); /* clamp to avoid pt_ioctl overflow */ /* create the pseudo tty device nodes */ for (j = 0; j < 10; j++) { for (i = 0; i < HEX_BASE; i++) { int m = j * HEX_BASE + i; if (m >= n_ptys) goto done; pt_ioctl[m].pt_devhandle = devfs_make_node(makedev(TTY_MAJOR, m), DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666, "tty%c%x", j + START_CHAR, i); (void)devfs_make_node(makedev(PTY_MAJOR, m), DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0666, "pty%c%x", j + START_CHAR, i); } } done: _pty_driver.master = PTY_MAJOR; _pty_driver.slave = TTY_MAJOR; _pty_driver.open_reset = 1; _pty_driver.open = &pty_get_ioctl; _pty_driver.name = &pty_get_name; tty_dev_register(&_pty_driver); return (0); } #endif // DEVFS