343 lines
7.6 KiB
C
343 lines
7.6 KiB
C
/* $NetBSD: hack.tty.c,v 1.8 2001/02/05 00:37:43 christos Exp $ */
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/*-
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* Copyright (c) 1988, 1993
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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[] = "@(#)hack.tty.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: hack.tty.c,v 1.8 2001/02/05 00:37:43 christos Exp $");
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#endif
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#endif /* not lint */
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/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
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/* hack.tty.c - version 1.0.3 */
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/*
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* With thanks to the people who sent code for SYSV - hpscdi!jon,
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* arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others.
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*/
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#include <termios.h>
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#include <termcap.h>
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#include "hack.h"
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#include "extern.h"
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/*
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* Some systems may have getchar() return EOF for various reasons, and
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* we should not quit before seeing at least NR_OF_EOFS consecutive EOFs.
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*/
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#ifndef BSD
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#define NR_OF_EOFS 20
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#endif /* BSD */
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static char erase_char, kill_char;
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static boolean settty_needed = FALSE;
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struct termios inittyb, curttyb;
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/*
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* Get initial state of terminal, set ospeed (for termcap routines)
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* and switch off tab expansion if necessary.
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* Called by startup() in termcap.c and after returning from ! or ^Z
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*/
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void
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gettty()
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{
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if (tcgetattr(0, &inittyb) < 0)
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perror("Hack (gettty)");
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curttyb = inittyb;
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ospeed = cfgetospeed(&inittyb);
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erase_char = inittyb.c_cc[VERASE];
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kill_char = inittyb.c_cc[VKILL];
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getioctls();
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/* do not expand tabs - they might be needed inside a cm sequence */
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if (curttyb.c_oflag & OXTABS) {
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curttyb.c_oflag &= ~OXTABS;
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setctty();
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}
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settty_needed = TRUE;
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}
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/* reset terminal to original state */
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void
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settty(s)
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char *s;
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{
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clear_screen();
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end_screen();
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if (s)
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printf("%s", s);
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(void) fflush(stdout);
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if (tcsetattr(0, TCSADRAIN, &inittyb) < 0)
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perror("Hack (settty)");
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flags.echo = (inittyb.c_lflag & ECHO) ? ON : OFF;
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flags.cbreak = (inittyb.c_lflag & ICANON) ? OFF : ON;
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setioctls();
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}
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void
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setctty()
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{
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if (tcsetattr(0, TCSADRAIN, &curttyb) < 0)
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perror("Hack (setctty)");
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}
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void
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setftty()
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{
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int change = 0;
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flags.cbreak = ON;
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flags.echo = OFF;
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/* Should use (ECHO|CRMOD) here instead of ECHO */
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if (curttyb.c_lflag & ECHO) {
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curttyb.c_lflag &= ~ECHO;
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change++;
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}
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if (curttyb.c_lflag & ICANON) {
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curttyb.c_lflag &= ~ICANON;
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/* be satisfied with one character; no timeout */
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curttyb.c_cc[VMIN] = 1;
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curttyb.c_cc[VTIME] = 0;
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change++;
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}
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if (change) {
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setctty();
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}
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start_screen();
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}
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/* fatal error */
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/* VARARGS1 */
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void
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#ifdef __STDC__
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error(const char *fmt, ...)
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#else
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error(va_alist)
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va_dcl
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#endif
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{
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va_list ap;
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#ifndef __STDC__
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const char *fmt;
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va_start(ap);
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fmt = va_arg(ap, const char *);
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#else
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va_start(ap, fmt);
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#endif
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if (settty_needed)
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settty((char *) 0);
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vprintf(fmt, ap);
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va_end(ap);
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putchar('\n');
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exit(1);
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}
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/*
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* Read a line closed with '\n' into the array char bufp[BUFSZ].
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* (The '\n' is not stored. The string is closed with a '\0'.)
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* Reading can be interrupted by an escape ('\033') - now the
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* resulting string is "\033".
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*/
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void
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getlin(bufp)
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char *bufp;
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{
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char *obufp = bufp;
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int c;
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flags.toplin = 2; /* nonempty, no --More-- required */
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for (;;) {
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(void) fflush(stdout);
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if ((c = getchar()) == EOF) {
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*bufp = 0;
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return;
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}
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if (c == '\033') {
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*obufp = c;
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obufp[1] = 0;
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return;
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}
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if (c == erase_char || c == '\b') {
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if (bufp != obufp) {
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bufp--;
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putstr("\b \b"); /* putsym converts \b */
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} else
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bell();
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} else if (c == '\n') {
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*bufp = 0;
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return;
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} else if (' ' <= c && c < '\177') {
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/*
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* avoid isprint() - some people don't have it ' ' is
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* not always a printing char
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*/
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*bufp = c;
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bufp[1] = 0;
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putstr(bufp);
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if (bufp - obufp < BUFSZ - 1 && bufp - obufp < COLNO)
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bufp++;
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} else if (c == kill_char || c == '\177') { /* Robert Viduya */
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/* this test last - @ might be the kill_char */
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while (bufp != obufp) {
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bufp--;
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putstr("\b \b");
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}
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} else
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bell();
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}
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}
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void
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getret()
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{
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cgetret("");
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}
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void
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cgetret(s)
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char *s;
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{
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putsym('\n');
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if (flags.standout)
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standoutbeg();
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putstr("Hit ");
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putstr(flags.cbreak ? "space" : "return");
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putstr(" to continue: ");
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if (flags.standout)
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standoutend();
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xwaitforspace(s);
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}
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char morc; /* tell the outside world what char he used */
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void
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xwaitforspace(s)
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char *s; /* chars allowed besides space or return */
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{
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int c;
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morc = 0;
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while ((c = readchar()) != '\n') {
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if (flags.cbreak) {
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if (c == ' ')
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break;
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if (s && strchr(s, c)) {
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morc = c;
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break;
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}
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bell();
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}
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}
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}
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char *
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parse()
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{
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static char inputline[COLNO];
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int foo;
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flags.move = 1;
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if (!Invisible)
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curs_on_u();
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else
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home();
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while ((foo = readchar()) >= '0' && foo <= '9')
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multi = 10 * multi + foo - '0';
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if (multi) {
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multi--;
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save_cm = inputline;
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}
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inputline[0] = foo;
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inputline[1] = 0;
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if (foo == 'f' || foo == 'F') {
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inputline[1] = getchar();
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#ifdef QUEST
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if (inputline[1] == foo)
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inputline[2] = getchar();
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else
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#endif /* QUEST */
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inputline[2] = 0;
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}
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if (foo == 'm' || foo == 'M') {
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inputline[1] = getchar();
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inputline[2] = 0;
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}
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clrlin();
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return (inputline);
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}
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char
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readchar()
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{
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int sym;
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(void) fflush(stdout);
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if ((sym = getchar()) == EOF)
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#ifdef NR_OF_EOFS
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{ /*
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* Some SYSV systems seem to return EOFs for various reasons
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* (?like when one hits break or for interrupted systemcalls?),
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* and we must see several before we quit.
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*/
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int cnt = NR_OF_EOFS;
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while (cnt--) {
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clearerr(stdin); /* omit if clearerr is
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* undefined */
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if ((sym = getchar()) != EOF)
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goto noteof;
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}
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end_of_input();
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noteof: ;
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}
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#else
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end_of_input();
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#endif /* NR_OF_EOFS */
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if (flags.toplin == 1)
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flags.toplin = 2;
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return ((char) sym);
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}
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void
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end_of_input()
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{
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settty("End of input?\n");
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clearlocks();
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exit(0);
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}
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