289 lines
7.4 KiB
C
289 lines
7.4 KiB
C
/* $NetBSD: tty.c,v 1.7 1997/07/22 07:37:11 mikel Exp $ */
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/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)tty.c 8.5 (Berkeley) 8/13/94";
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#else
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__RCSID("$NetBSD: tty.c,v 1.7 1997/07/22 07:37:11 mikel Exp $");
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#endif
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#endif /* not lint */
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include "curses.h"
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/*
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* In general, curses should leave tty hardware settings alone (speed, parity,
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* word size). This is most easily done in BSD by using TCSASOFT on all
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* tcsetattr calls. On other systems, it would be better to get and restore
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* those attributes at each change, or at least when stopped and restarted.
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* See also the comments in getterm().
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*/
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#ifdef TCSASOFT
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int __tcaction = 1; /* Ignore hardware settings. */
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#else
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int __tcaction = 0;
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#endif
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struct termios __orig_termios, __baset;
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static struct termios cbreakt, rawt, *curt;
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static int useraw;
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#ifndef OXTABS
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#ifdef XTABS /* SMI uses XTABS. */
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#define OXTABS XTABS
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#else
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#define OXTABS 0
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#endif
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#endif
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/*
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* gettmode --
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* Do terminal type initialization.
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*/
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int
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gettmode()
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{
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useraw = 0;
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if (tcgetattr(STDIN_FILENO, &__orig_termios))
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return (ERR);
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__baset = __orig_termios;
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__baset.c_oflag &= ~OXTABS;
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GT = 0; /* historical. was used before we wired OXTABS off */
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NONL = (__baset.c_oflag & ONLCR) == 0;
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/*
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* XXX
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* System V and SMI systems overload VMIN and VTIME, such that
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* VMIN is the same as the VEOF element, and VTIME is the same
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* as the VEOL element. This means that, if VEOF was ^D, the
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* default VMIN is 4. Majorly stupid.
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*/
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cbreakt = __baset;
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cbreakt.c_lflag &= ~ICANON;
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cbreakt.c_cc[VMIN] = 1;
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cbreakt.c_cc[VTIME] = 0;
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rawt = cbreakt;
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rawt.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|INLCR|IGNCR|ICRNL|IXON);
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rawt.c_oflag &= ~OPOST;
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rawt.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
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/*
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* In general, curses should leave hardware-related settings alone.
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* This includes parity and word size. Older versions set the tty
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* to 8 bits, no parity in raw(), but this is considered to be an
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* artifact of the old tty interface. If it's desired to change
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* parity and word size, the TCSASOFT bit has to be removed from the
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* calls that switch to/from "raw" mode.
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*/
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if (!__tcaction) {
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rawt.c_iflag &= ~ISTRIP;
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rawt.c_cflag &= ~(CSIZE|PARENB);
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rawt.c_cflag |= CS8;
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}
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curt = &__baset;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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int
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raw()
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{
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useraw = __pfast = __rawmode = 1;
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curt = &rawt;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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int
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noraw()
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{
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useraw = __pfast = __rawmode = 0;
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curt = &__baset;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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int
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cbreak()
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{
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__rawmode = 1;
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curt = useraw ? &rawt : &cbreakt;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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int
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nocbreak()
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{
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__rawmode = 0;
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curt = useraw ? &rawt : &__baset;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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int
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echo()
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{
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rawt.c_lflag |= ECHO;
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cbreakt.c_lflag |= ECHO;
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__baset.c_lflag |= ECHO;
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__echoit = 1;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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int
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noecho()
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{
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rawt.c_lflag &= ~ECHO;
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cbreakt.c_lflag &= ~ECHO;
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__baset.c_lflag &= ~ECHO;
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__echoit = 0;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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int
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nl()
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{
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rawt.c_iflag |= ICRNL;
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rawt.c_oflag |= ONLCR;
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cbreakt.c_iflag |= ICRNL;
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cbreakt.c_oflag |= ONLCR;
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__baset.c_iflag |= ICRNL;
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__baset.c_oflag |= ONLCR;
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__pfast = __rawmode;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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int
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nonl()
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{
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rawt.c_iflag &= ~ICRNL;
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rawt.c_oflag &= ~ONLCR;
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cbreakt.c_iflag &= ~ICRNL;
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cbreakt.c_oflag &= ~ONLCR;
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__baset.c_iflag &= ~ICRNL;
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__baset.c_oflag &= ~ONLCR;
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__pfast = 1;
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, curt) ? ERR : OK);
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}
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void
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__startwin()
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{
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static char *stdbuf;
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static size_t len;
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(void)fflush(stdout);
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/*
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* Some C libraries default to a 1K buffer when talking to a tty.
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* With a larger screen, especially across a network, we'd like
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* to get it to all flush in a single write. Make it twice as big
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* as just the characters (so that we have room for cursor motions
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* and standout information) but no more than 8K.
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*/
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if (stdbuf == NULL) {
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if ((len = LINES * COLS * 2) > 8192)
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len = 8192;
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if ((stdbuf = malloc(len)) == NULL)
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len = 0;
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}
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(void)setvbuf(stdout, stdbuf, _IOFBF, len);
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tputs(TI, 0, __cputchar);
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tputs(VS, 0, __cputchar);
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}
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int
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endwin()
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{
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__restore_stophandler();
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if (curscr != NULL) {
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if (curscr->flags & __WSTANDOUT) {
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tputs(SE, 0, __cputchar);
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curscr->flags &= ~__WSTANDOUT;
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}
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__mvcur(curscr->cury, curscr->cury, curscr->maxy - 1, 0, 0);
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}
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(void)tputs(VE, 0, __cputchar);
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(void)tputs(TE, 0, __cputchar);
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(void)fflush(stdout);
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(void)setvbuf(stdout, NULL, _IOLBF, 0);
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, &__orig_termios) ? ERR : OK);
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}
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/*
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* The following routines, savetty and resetty are completely useless and
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* are left in only as stubs. If people actually use them they will almost
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* certainly screw up the state of the world.
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*/
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static struct termios savedtty;
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int
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savetty()
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{
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return (tcgetattr(STDIN_FILENO, &savedtty) ? ERR : OK);
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}
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int
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resetty()
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{
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return (tcsetattr(STDIN_FILENO, __tcaction ?
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TCSASOFT | TCSADRAIN : TCSADRAIN, &savedtty) ? ERR : OK);
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}
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