456 lines
15 KiB
C
456 lines
15 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Copyright (c) 2002 Networks Associates Technologies, Inc.
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* All rights reserved.
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*
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* Portions of this software were developed for the FreeBSD Project by
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* ThinkSec AS and NAI Labs, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tty.h 8.6 (Berkeley) 1/21/94
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* $FreeBSD$
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*/
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#ifndef _SYS_TTY_H_
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#define _SYS_TTY_H_
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#include <sys/termios.h>
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#include <sys/queue.h>
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#include <sys/selinfo.h>
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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/*
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* Clists are character lists, which is a variable length linked list
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* of cblocks, with a count of the number of characters in the list.
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*/
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struct clist {
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int c_cc; /* Number of characters in the clist. */
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int c_cbcount; /* Number of cblocks. */
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int c_cbmax; /* Max # cblocks allowed for this clist. */
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int c_cbreserved; /* # cblocks reserved for this clist. */
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char *c_cf; /* Pointer to the first cblock. */
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char *c_cl; /* Pointer to the last cblock. */
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};
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struct tty;
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struct pps_state;
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struct cdev;
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struct cdevsw;
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struct thread;
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typedef int t_open_t(struct tty *, struct cdev *);
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typedef void t_close_t(struct tty *);
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typedef void t_oproc_t(struct tty *);
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typedef void t_purge_t(struct tty *);
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typedef void t_stop_t(struct tty *, int);
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typedef int t_param_t(struct tty *, struct termios *);
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typedef int t_modem_t(struct tty *, int, int);
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typedef void t_break_t(struct tty *, int);
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typedef int t_ioctl_t(struct tty *, u_long cmd, void * data,
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int fflag, struct thread *td);
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/* XXX: same as d_ioctl_t in sys/conf.h to avoid #include polution */
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typedef int __d_ioctl_t(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td);
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/*
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* Per-tty structure.
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*
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* Should be split in two, into device and tty drivers.
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* Glue could be masks of what to echo and circular buffer
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* (low, high, timeout).
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*/
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struct tty {
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struct clist t_rawq; /* Device raw input queue. */
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long t_rawcc; /* Raw input queue statistics. */
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struct clist t_canq; /* Device canonical queue. */
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long t_cancc; /* Canonical queue statistics. */
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struct clist t_outq; /* Device output queue. */
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long t_outcc; /* Output queue statistics. */
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int t_line; /* Interface to device drivers. */
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struct cdev *t_dev; /* Device. */
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struct cdev *t_mdev; /* Device. */
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u_int t_devunit; /* Cdev unit number */
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int t_state; /* Device and driver (TS*) state. */
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int t_flags; /* Tty flags. */
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int t_timeout; /* Timeout for ttywait() */
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struct pgrp *t_pgrp; /* Foreground process group. */
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struct session *t_session; /* Enclosing session. */
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struct sigio *t_sigio; /* Information for async I/O. */
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struct selinfo t_rsel; /* Tty read/oob select. */
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struct selinfo t_wsel; /* Tty write select. */
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struct termios t_termios; /* Termios state. */
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struct termios t_init_in; /* ... init ingoing */
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struct termios t_init_out; /* ... outgoing */
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struct termios t_lock_in; /* ... lock ingoing */
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struct termios t_lock_out; /* ... outgoing */
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struct winsize t_winsize; /* Window size. */
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void *t_sc; /* driver private softc pointer. */
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void *t_lsc; /* linedisc private softc pointer. */
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int t_column; /* Tty output column. */
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int t_rocount, t_rocol; /* Tty. */
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int t_ififosize; /* Total size of upstream fifos. */
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int t_ihiwat; /* High water mark for input. */
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int t_ilowat; /* Low water mark for input. */
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speed_t t_ispeedwat; /* t_ispeed override for watermarks. */
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int t_ohiwat; /* High water mark for output. */
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int t_olowat; /* Low water mark for output. */
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speed_t t_ospeedwat; /* t_ospeed override for watermarks. */
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int t_gen; /* Generation number. */
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TAILQ_ENTRY(tty) t_list; /* Global chain of ttys for pstat(8) */
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int t_actout; /* Outbound device open */
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int t_wopeners; /* #threads waiting for DCD in open */
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struct mtx t_mtx;
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int t_refcnt;
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int t_hotchar; /* linedisc preferred hot char */
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int t_dtr_wait; /* Inter-session DTR holddown [hz] */
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int t_do_timestamp; /* flag instead ? */
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struct timeval t_timestamp; /* char timestamp */
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struct pps_state *t_pps; /* PPS-API stuff */
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/* Driver supplied methods */
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t_oproc_t *t_oproc; /* Start output. */
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t_stop_t *t_stop; /* Stop output. */
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t_param_t *t_param; /* Set parameters. */
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t_modem_t *t_modem; /* Set modem state (optional). */
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t_break_t *t_break; /* Set break state (optional). */
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t_ioctl_t *t_ioctl; /* Set ioctl handling (optional). */
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t_open_t *t_open; /* First open */
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t_purge_t *t_purge; /* Purge threads */
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t_close_t *t_close; /* Last close */
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__d_ioctl_t *t_cioctl; /* Ioctl on control devices */
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};
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#define t_cc t_termios.c_cc
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#define t_cflag t_termios.c_cflag
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#define t_iflag t_termios.c_iflag
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#define t_ispeed t_termios.c_ispeed
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#define t_lflag t_termios.c_lflag
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#define t_min t_termios.c_min
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#define t_oflag t_termios.c_oflag
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#define t_ospeed t_termios.c_ospeed
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#define t_time t_termios.c_time
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#define TTIPRI (PSOCK + 1) /* Sleep priority for tty reads. */
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#define TTOPRI (PSOCK + 2) /* Sleep priority for tty writes. */
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/*
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* Userland version of struct tty, for sysctl.
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*/
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struct xtty {
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size_t xt_size; /* Structure size. */
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long xt_rawcc; /* Raw input queue statistics. */
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long xt_cancc; /* Canonical queue statistics. */
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long xt_outcc; /* Output queue statistics. */
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int xt_line; /* Interface to device drivers. */
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dev_t xt_dev; /* Userland (sysctl) instance. */
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int xt_state; /* Device and driver (TS*) state. */
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int xt_flags; /* Tty flags. */
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int xt_timeout; /* Timeout for ttywait(). */
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pid_t xt_pgid; /* Process group ID. */
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pid_t xt_sid; /* Session ID. */
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struct termios xt_termios; /* Termios state. */
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struct winsize xt_winsize; /* Window size. */
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int xt_column; /* Tty output column. */
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int xt_rocount, xt_rocol; /* Tty. */
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int xt_ififosize; /* Total size of upstream fifos. */
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int xt_ihiwat; /* High water mark for input. */
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int xt_ilowat; /* Low water mark for input. */
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speed_t xt_ispeedwat; /* t_ispeed override for watermarks. */
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int xt_ohiwat; /* High water mark for output. */
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int xt_olowat; /* Low water mark for output. */
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speed_t xt_ospeedwat; /* t_ospeed override for watermarks. */
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};
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/*
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* User data unfortunately has to be copied through buffers on the way to
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* and from clists. The buffers are on the stack so their sizes must be
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* fairly small.
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*/
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#define IBUFSIZ 384 /* Should be >= max value of MIN. */
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#define OBUFSIZ 100
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#ifndef TTYHOG
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#define TTYHOG 8192
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#endif
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#ifdef _KERNEL
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#define TTMAXHIWAT roundup(2048, CBSIZE)
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#define TTMINHIWAT roundup(100, CBSIZE)
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#define TTMAXLOWAT 256
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#define TTMINLOWAT 32
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#endif
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/* These flags are kept in t_state. */
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#define TS_SO_OLOWAT 0x00001 /* Wake up when output <= low water. */
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#define TS_ASYNC 0x00002 /* Tty in async I/O mode. */
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#define TS_BUSY 0x00004 /* Draining output. */
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#define TS_CARR_ON 0x00008 /* Carrier is present. */
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#define TS_FLUSH 0x00010 /* Outq has been flushed during DMA. */
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#define TS_ISOPEN 0x00020 /* Open has completed. */
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#define TS_TBLOCK 0x00040 /* Further input blocked. */
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#define TS_TIMEOUT 0x00080 /* Wait for output char processing. */
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#define TS_TTSTOP 0x00100 /* Output paused. */
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#ifdef notyet
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#define TS_WOPEN 0x00200 /* Open in progress. */
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#endif
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#define TS_XCLUDE 0x00400 /* Tty requires exclusivity. */
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/* State for intra-line fancy editing work. */
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#define TS_BKSL 0x00800 /* State for lowercase \ work. */
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#define TS_CNTTB 0x01000 /* Counting tab width, ignore FLUSHO. */
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#define TS_ERASE 0x02000 /* Within a \.../ for PRTRUB. */
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#define TS_LNCH 0x04000 /* Next character is literal. */
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#define TS_TYPEN 0x08000 /* Retyping suspended input (PENDIN). */
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#define TS_LOCAL (TS_BKSL | TS_CNTTB | TS_ERASE | TS_LNCH | TS_TYPEN)
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/* Extras. */
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#define TS_CAN_BYPASS_L_RINT 0x010000 /* Device in "raw" mode. */
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#define TS_CONNECTED 0x020000 /* Connection open. */
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#define TS_SNOOP 0x040000 /* Device is being snooped on. */
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#define TS_SO_OCOMPLETE 0x080000 /* Wake up when output completes. */
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#define TS_ZOMBIE 0x100000 /* Connection lost. */
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/* Hardware flow-control-invoked bits. */
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#define TS_CAR_OFLOW 0x200000 /* For MDMBUF (XXX handle in driver). */
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#ifdef notyet
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#define TS_CTS_OFLOW 0x400000 /* For CCTS_OFLOW. */
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#define TS_DSR_OFLOW 0x800000 /* For CDSR_OFLOW. */
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#endif
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#define TS_DTR_WAIT 0x1000000 /* DTR hold-down between sessions */
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#define TS_GONE 0x2000000 /* Hardware detached */
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#define TS_CALLOUT 0x4000000 /* Callout devices */
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/* Character type information. */
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#define ORDINARY 0
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#define CONTROL 1
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#define BACKSPACE 2
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#define NEWLINE 3
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#define TAB 4
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#define VTAB 5
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#define RETURN 6
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struct speedtab {
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int sp_speed; /* Speed. */
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int sp_code; /* Code. */
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};
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/* Modem control commands (driver). */
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#define DMSET 0
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#define DMBIS 1
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#define DMBIC 2
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#define DMGET 3
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/* Flags on a character passed to ttyinput. */
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#define TTY_CHARMASK 0x000000ff /* Character mask */
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#define TTY_QUOTE 0x00000100 /* Character quoted */
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#define TTY_ERRORMASK 0xff000000 /* Error mask */
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#define TTY_FE 0x01000000 /* Framing error */
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#define TTY_PE 0x02000000 /* Parity error */
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#define TTY_OE 0x04000000 /* Overrun error */
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#define TTY_BI 0x08000000 /* Break condition */
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/* Is tp controlling terminal for p? */
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#define isctty(p, tp) \
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((p)->p_session == (tp)->t_session && (p)->p_flag & P_CONTROLT)
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/* Is p in background of tp? */
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#define isbackground(p, tp) \
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(isctty((p), (tp)) && (p)->p_pgrp != (tp)->t_pgrp)
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/* Unique sleep addresses. */
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#define TSA_CARR_ON(tp) ((void *)&(tp)->t_rawq)
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#define TSA_HUP_OR_INPUT(tp) ((void *)&(tp)->t_rawq.c_cf)
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#define TSA_OCOMPLETE(tp) ((void *)&(tp)->t_outq.c_cl)
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#define TSA_OLOWAT(tp) ((void *)&(tp)->t_outq)
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#ifdef _KERNEL
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_TTYS);
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#endif
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/* Minor number flag bits */
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#define MINOR_CALLOUT 0x80000000
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#define MINOR_INIT 0x40000000
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#define MINOR_LOCK 0x20000000
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#define ISCALLOUT(dev) (minor(dev) & MINOR_CALLOUT)
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#define ISINIT(dev) (minor(dev) & MINOR_INIT)
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#define ISLOCK(dev) (minor(dev) & MINOR_LOCK)
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extern struct msgbuf consmsgbuf; /* Message buffer for constty. */
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extern struct tty *constty; /* Temporary virtual console. */
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extern long tk_cancc;
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extern long tk_nin;
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extern long tk_nout;
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extern long tk_rawcc;
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int b_to_q(char *cp, int cc, struct clist *q);
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void catq(struct clist *from, struct clist *to);
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void clist_alloc_cblocks(struct clist *q, int ccmax, int ccres);
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void clist_free_cblocks(struct clist *q);
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void constty_set(struct tty *tp);
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void constty_clear(void);
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int getc(struct clist *q);
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void ndflush(struct clist *q, int cc);
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char *nextc(struct clist *q, char *cp, int *c);
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void nottystop(struct tty *tp, int rw);
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int putc(int c, struct clist *q);
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int q_to_b(struct clist *q, char *cp, int cc);
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void termioschars(struct termios *t);
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int tputchar(int c, struct tty *tp);
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int ttcompat(struct tty *tp, u_long com, caddr_t data, int flag);
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int ttioctl(struct tty *tp, u_long com, void *data, int flag);
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int ttread(struct tty *tp, struct uio *uio, int flag);
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void ttrstrt(void *tp);
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void ttsetwater(struct tty *tp);
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int ttspeedtab(int speed, struct speedtab *table);
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int ttstart(struct tty *tp);
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void ttwakeup(struct tty *tp);
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int ttwrite(struct tty *tp, struct uio *uio, int flag);
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void ttwwakeup(struct tty *tp);
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struct tty *ttyalloc(void);
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void ttyblock(struct tty *tp);
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void ttychars(struct tty *tp);
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int ttycheckoutq(struct tty *tp, int wait);
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void ttyconsolemode(struct tty *tp, int speed);
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int tty_close(struct tty *tp);
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int ttycreate(struct tty *tp, int flags, const char *fmt, ...) __printflike(3, 4);
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int ttydtrwaitsleep(struct tty *tp);
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void ttydtrwaitstart(struct tty *tp);
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void ttyflush(struct tty *tp, int rw);
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void ttyfree(struct tty *tp);
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void ttygone(struct tty *tp);
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void ttyinfo(struct tty *tp);
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void ttyinitmode(struct tty *tp, int echo, int speed);
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int ttyinput(int c, struct tty *tp);
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int ttylclose(struct tty *tp, int flag);
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void ttyldoptim(struct tty *tp);
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int ttymodem(struct tty *tp, int flag);
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int tty_open(struct cdev *device, struct tty *tp);
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int ttyref(struct tty *tp);
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int ttyrel(struct tty *tp);
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int ttysleep(struct tty *tp, void *chan, int pri, char *wmesg, int timo);
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int ttywait(struct tty *tp);
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int unputc(struct clist *q);
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static __inline int
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tt_open(struct tty *t, struct cdev *c)
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{
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if (t->t_open == NULL)
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return (0);
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return (t->t_open(t, c));
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}
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static __inline void
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tt_close(struct tty *t)
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{
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if (t->t_close != NULL)
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return (t->t_close(t));
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}
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static __inline void
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tt_oproc(struct tty *t)
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{
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if (t->t_oproc != NULL) /* XXX: Kludge for pty. */
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t->t_oproc(t);
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}
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static __inline void
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tt_purge(struct tty *t)
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{
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if (t->t_purge != NULL)
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t->t_purge(t);
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}
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static __inline void
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tt_stop(struct tty *t, int i)
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{
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t->t_stop(t, i);
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}
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static __inline int
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tt_param(struct tty *t, struct termios *s)
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{
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if (t->t_param == NULL)
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return (0);
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return (t->t_param(t, s));
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}
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static __inline int
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tt_modem(struct tty *t, int i, int j)
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{
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if (t->t_modem == NULL)
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return (0);
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return (t->t_modem(t, i, j));
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}
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static __inline int
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tt_break(struct tty *t, int i)
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{
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if (t->t_break == NULL)
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return (ENOIOCTL);
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t->t_break(t, i);
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return (0);
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}
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static __inline int
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tt_ioctl(struct tty *t, u_long cmd, void *data,
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int fflag, struct thread *td)
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|
{
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return (t->t_ioctl(t, cmd, data, fflag, td));
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}
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/*
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* XXX: temporary
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*/
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#include <sys/linedisc.h>
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#endif /* _KERNEL */
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|
#endif /* !_SYS_TTY_H_ */
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