672 lines
16 KiB
C
672 lines
16 KiB
C
/* $NetBSD: tty.c,v 1.43 2011/08/29 11:07:38 christos 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. 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 8.6 (Berkeley) 1/10/95";
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#else
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__RCSID("$NetBSD: tty.c,v 1.43 2011/08/29 11:07:38 christos Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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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 <sys/fcntl.h>
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#include <sys/ioctl.h>
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#include "curses.h"
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#include "curses_private.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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#ifndef TCSASOFT
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#define TCSASOFT 0
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#endif
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int __tcaction = TCSASOFT != 0; /* Ignore hardware settings */
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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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* baudrate --
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* Return the current baudrate
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*/
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int
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baudrate(void)
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{
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if (_cursesi_screen->notty == TRUE)
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return 0;
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return cfgetospeed(&_cursesi_screen->baset);
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}
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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(void)
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{
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if (_cursesi_gettmode(_cursesi_screen) == ERR)
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return ERR;
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__GT = _cursesi_screen->GT;
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__NONL = _cursesi_screen->NONL;
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return OK;
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}
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/*
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* _cursesi_gettmode --
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* Do the terminal type initialisation for the tty attached to the
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* given screen.
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*/
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int
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_cursesi_gettmode(SCREEN *screen)
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{
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screen->useraw = 0;
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if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) {
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/* if the input fd is not a tty try the output */
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if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) {
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/* not a tty ... we will disable tty related stuff */
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screen->notty = TRUE;
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__GT = 0;
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__NONL = 0;
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return OK;
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}
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}
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screen->baset = screen->orig_termios;
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screen->baset.c_oflag &= ~OXTABS;
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screen->GT = 0; /* historical. was used before we wired OXTABS off */
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screen->NONL = (screen->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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screen->cbreakt = screen->baset;
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screen->cbreakt.c_lflag &= ~(ECHO | ECHONL | ICANON);
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screen->cbreakt.c_cc[VMIN] = 1;
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screen->cbreakt.c_cc[VTIME] = 0;
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screen->rawt = screen->cbreakt;
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screen->rawt.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | INLCR | IGNCR |
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ICRNL | IXON);
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screen->rawt.c_oflag &= ~OPOST;
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screen->rawt.c_lflag &= ~(ISIG | IEXTEN);
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#if TCSASOFT == 0
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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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screen->rawt.c_iflag &= ~ISTRIP;
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screen->rawt.c_cflag &= ~(CSIZE | PARENB);
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screen->rawt.c_cflag |= CS8;
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#endif
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screen->curt = &screen->baset;
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return tcsetattr(fileno(screen->infd), TCSASOFT | TCSADRAIN,
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screen->curt) ? ERR : OK;
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}
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/*
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* raw --
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* Put the terminal into raw mode
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*/
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int
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raw(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "raw()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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_cursesi_screen->useraw = __pfast = __rawmode = 1;
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_cursesi_screen->curt = &_cursesi_screen->rawt;
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if (_cursesi_screen->notty == TRUE)
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return OK;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
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_cursesi_screen->curt) ? ERR : OK;
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}
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/*
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* noraw --
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* Put the terminal into cooked mode
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*/
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int
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noraw(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "noraw()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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_cursesi_screen->useraw = __pfast = __rawmode = 0;
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if (_cursesi_screen->notty == TRUE)
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return OK;
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_cursesi_screen->curt = &_cursesi_screen->baset;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
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_cursesi_screen->curt) ? ERR : OK;
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}
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/*
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* cbreak --
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* Enable cbreak mode
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*/
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int
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cbreak(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "cbreak()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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__rawmode = 1;
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if (_cursesi_screen->notty == TRUE)
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return OK;
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_cursesi_screen->curt = _cursesi_screen->useraw ?
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&_cursesi_screen->rawt : &_cursesi_screen->cbreakt;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
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_cursesi_screen->curt) ? ERR : OK;
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}
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/*
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* nocbreak --
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* Disable cbreak mode
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*/
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int
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nocbreak(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "nocbreak()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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__rawmode = 0;
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if (_cursesi_screen->notty == TRUE)
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return OK;
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/* if we were in halfdelay mode then nuke the timeout */
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if ((_cursesi_screen->half_delay == TRUE) &&
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(__notimeout() == ERR))
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return ERR;
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_cursesi_screen->half_delay = FALSE;
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_cursesi_screen->curt = _cursesi_screen->useraw ?
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&_cursesi_screen->rawt : &_cursesi_screen->baset;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
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_cursesi_screen->curt) ? ERR : OK;
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}
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/*
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* halfdelay --
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* Put the terminal into cbreak mode with the specified timeout.
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*
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*/
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int
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halfdelay(int duration)
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{
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if ((duration < 1) || (duration > 255))
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return ERR;
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if (cbreak() == ERR)
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return ERR;
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if (__timeout(duration) == ERR)
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return ERR;
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_cursesi_screen->half_delay = TRUE;
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return OK;
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}
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int
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__delay(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "__delay()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return OK;
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_cursesi_screen->rawt.c_cc[VMIN] = 1;
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_cursesi_screen->rawt.c_cc[VTIME] = 0;
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_cursesi_screen->cbreakt.c_cc[VMIN] = 1;
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_cursesi_screen->cbreakt.c_cc[VTIME] = 0;
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_cursesi_screen->baset.c_cc[VMIN] = 1;
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_cursesi_screen->baset.c_cc[VTIME] = 0;
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if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW,
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_cursesi_screen->curt)) {
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__restore_termios();
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return ERR;
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}
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return OK;
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}
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int
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__nodelay(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "__nodelay()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return OK;
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_cursesi_screen->rawt.c_cc[VMIN] = 0;
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_cursesi_screen->rawt.c_cc[VTIME] = 0;
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_cursesi_screen->cbreakt.c_cc[VMIN] = 0;
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_cursesi_screen->cbreakt.c_cc[VTIME] = 0;
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_cursesi_screen->baset.c_cc[VMIN] = 0;
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_cursesi_screen->baset.c_cc[VTIME] = 0;
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if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW,
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_cursesi_screen->curt)) {
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__restore_termios();
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return ERR;
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}
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return OK;
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}
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void
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__save_termios(void)
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{
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return;
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_cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN];
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_cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME];
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}
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void
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__restore_termios(void)
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{
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return;
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_cursesi_screen->rawt.c_cc[VMIN] = _cursesi_screen->ovmin;
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_cursesi_screen->rawt.c_cc[VTIME] = _cursesi_screen->ovtime;
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_cursesi_screen->cbreakt.c_cc[VMIN] = _cursesi_screen->ovmin;
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_cursesi_screen->cbreakt.c_cc[VTIME] = _cursesi_screen->ovtime;
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_cursesi_screen->baset.c_cc[VMIN] = _cursesi_screen->ovmin;
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_cursesi_screen->baset.c_cc[VTIME] = _cursesi_screen->ovtime;
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}
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int
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__timeout(int delay)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "__timeout()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return OK;
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_cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN];
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_cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME];
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_cursesi_screen->rawt.c_cc[VMIN] = 0;
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_cursesi_screen->rawt.c_cc[VTIME] = delay;
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_cursesi_screen->cbreakt.c_cc[VMIN] = 0;
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_cursesi_screen->cbreakt.c_cc[VTIME] = delay;
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_cursesi_screen->baset.c_cc[VMIN] = 0;
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_cursesi_screen->baset.c_cc[VTIME] = delay;
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if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW,
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_cursesi_screen->curt)) {
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__restore_termios();
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return ERR;
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}
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return OK;
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}
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int
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__notimeout(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "__notimeout()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return OK;
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_cursesi_screen->rawt.c_cc[VMIN] = 1;
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_cursesi_screen->rawt.c_cc[VTIME] = 0;
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_cursesi_screen->cbreakt.c_cc[VMIN] = 1;
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_cursesi_screen->cbreakt.c_cc[VTIME] = 0;
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_cursesi_screen->baset.c_cc[VMIN] = 1;
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_cursesi_screen->baset.c_cc[VTIME] = 0;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW,
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_cursesi_screen->curt) ? ERR : OK;
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}
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int
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echo(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "echo()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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__echoit = 1;
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return OK;
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}
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int
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noecho(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "noecho()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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__echoit = 0;
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return OK;
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}
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int
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nl(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "nl()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return OK;
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_cursesi_screen->rawt.c_iflag |= ICRNL;
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_cursesi_screen->rawt.c_oflag |= ONLCR;
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_cursesi_screen->cbreakt.c_iflag |= ICRNL;
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_cursesi_screen->cbreakt.c_oflag |= ONLCR;
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_cursesi_screen->baset.c_iflag |= ICRNL;
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_cursesi_screen->baset.c_oflag |= ONLCR;
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_cursesi_screen->nl = 1;
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_cursesi_screen->pfast = _cursesi_screen->rawmode;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
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_cursesi_screen->curt) ? ERR : OK;
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}
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int
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nonl(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "nonl()\n");
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#endif
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return OK;
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_cursesi_screen->rawt.c_iflag &= ~ICRNL;
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_cursesi_screen->rawt.c_oflag &= ~ONLCR;
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_cursesi_screen->cbreakt.c_iflag &= ~ICRNL;
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_cursesi_screen->cbreakt.c_oflag &= ~ONLCR;
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_cursesi_screen->baset.c_iflag &= ~ICRNL;
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_cursesi_screen->baset.c_oflag &= ~ONLCR;
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_cursesi_screen->nl = 0;
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__pfast = 1;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
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_cursesi_screen->curt) ? ERR : OK;
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}
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#ifndef _CURSES_USE_MACROS
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void
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noqiflush(void)
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{
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(void) intrflush(stdscr, FALSE);
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}
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void
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qiflush(void)
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{
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(void) intrflush(stdscr, TRUE);
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}
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#endif /* _CURSES_USE_MACROS */
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int
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intrflush(WINDOW *win, bool bf) /*ARGSUSED*/
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{
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/* Check if we need to restart ... */
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if (_cursesi_screen->endwin)
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__restartwin();
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if (_cursesi_screen->notty == TRUE)
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return OK;
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if (bf) {
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_cursesi_screen->rawt.c_lflag &= ~NOFLSH;
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_cursesi_screen->cbreakt.c_lflag &= ~NOFLSH;
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_cursesi_screen->baset.c_lflag &= ~NOFLSH;
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} else {
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_cursesi_screen->rawt.c_lflag |= NOFLSH;
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_cursesi_screen->cbreakt.c_lflag |= NOFLSH;
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_cursesi_screen->baset.c_lflag |= NOFLSH;
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}
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__pfast = 1;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
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_cursesi_screen->curt) ? ERR : OK;
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}
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void
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__startwin(SCREEN *screen)
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{
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(void) fflush(screen->infd);
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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 attribute information) but no more than 8K.
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*/
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if (screen->stdbuf == NULL) {
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screen->len = LINES * COLS * 2;
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if (screen->len > 8192)
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screen->len = 8192;
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if ((screen->stdbuf = malloc(screen->len)) == NULL)
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screen->len = 0;
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}
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(void) setvbuf(screen->outfd, screen->stdbuf, _IOFBF, screen->len);
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ti_puts(screen->term, t_enter_ca_mode(screen->term), 0,
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__cputchar_args, (void *) screen->outfd);
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ti_puts(screen->term, t_cursor_normal(screen->term), 0,
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__cputchar_args, (void *) screen->outfd);
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if (screen->curscr->flags & __KEYPAD)
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ti_puts(screen->term, t_keypad_xmit(screen->term), 0,
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__cputchar_args, (void *) screen->outfd);
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screen->endwin = 0;
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}
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int
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endwin(void)
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{
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#ifdef DEBUG
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__CTRACE(__CTRACE_MISC, "endwin\n");
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#endif
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return __stopwin();
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}
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bool
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isendwin(void)
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{
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return _cursesi_screen->endwin ? TRUE : FALSE;
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}
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int
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flushinp(void)
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{
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(void) fpurge(_cursesi_screen->infd);
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return 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(void)
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{
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if (_cursesi_screen->notty == TRUE)
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return OK;
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return tcgetattr(fileno(_cursesi_screen->infd),
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&_cursesi_screen->savedtty) ? ERR : OK;
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}
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int
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resetty(void)
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{
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if (_cursesi_screen->notty == TRUE)
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return OK;
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return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
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&_cursesi_screen->savedtty) ? ERR : OK;
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}
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/*
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* erasechar --
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* Return the character of the erase key.
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*/
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char
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erasechar(void)
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{
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if (_cursesi_screen->notty == TRUE)
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return 0;
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return _cursesi_screen->baset.c_cc[VERASE];
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}
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/*
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* killchar --
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* Return the character of the kill key.
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*/
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char
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killchar(void)
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{
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if (_cursesi_screen->notty == TRUE)
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return 0;
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return _cursesi_screen->baset.c_cc[VKILL];
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}
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/*
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* erasewchar --
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* Return the wide character of the erase key.
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*/
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int
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erasewchar( wchar_t *ch )
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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if (_cursesi_screen->notty == TRUE)
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return ERR;
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*ch = _cursesi_screen->baset.c_cc[VERASE];
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return OK;
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#endif /* HAVE_WCHAR */
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}
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/*
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* killwchar --
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* Return the wide character of the kill key.
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*/
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int
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killwchar( wchar_t *ch )
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{
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#ifndef HAVE_WCHAR
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return ERR;
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#else
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if (_cursesi_screen->notty == TRUE)
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return 0;
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*ch = _cursesi_screen->baset.c_cc[VKILL];
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return OK;
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#endif /* HAVE_WCHAR */
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}
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