273 lines
6.7 KiB
C
273 lines
6.7 KiB
C
/* $NetBSD: set.c,v 1.17 2012/04/21 12:27:30 roy Exp $ */
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/*-
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* Copyright (c) 1991, 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. 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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__RCSID("$NetBSD: set.c,v 1.17 2012/04/21 12:27:30 roy Exp $");
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#include <err.h>
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#include <stdio.h>
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#include <term.h>
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#include <termios.h>
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#include <unistd.h>
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#include "extern.h"
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#define CHK(val, dft) (val <= 0 ? dft : val)
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static int set_tabs(void);
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/*
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* Reset the terminal mode bits to a sensible state. Very useful after
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* a child program dies in raw mode.
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*/
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void
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reset_mode(void)
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{
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tcgetattr(STDERR_FILENO, &mode);
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#if defined(VDISCARD) && defined(CDISCARD)
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mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD);
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#endif
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mode.c_cc[VEOF] = CHK(mode.c_cc[VEOF], CEOF);
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mode.c_cc[VERASE] = CHK(mode.c_cc[VERASE], CERASE);
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#if defined(VFLUSH) && defined(CFLUSH)
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mode.c_cc[VFLUSH] = CHK(mode.c_cc[VFLUSH], CFLUSH);
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#endif
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mode.c_cc[VINTR] = CHK(mode.c_cc[VINTR], CINTR);
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mode.c_cc[VKILL] = CHK(mode.c_cc[VKILL], CKILL);
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#if defined(VLNEXT) && defined(CLNEXT)
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mode.c_cc[VLNEXT] = CHK(mode.c_cc[VLNEXT], CLNEXT);
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#endif
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mode.c_cc[VQUIT] = CHK(mode.c_cc[VQUIT], CQUIT);
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#if defined(VREPRINT) && defined(CRPRNT)
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mode.c_cc[VREPRINT] = CHK(mode.c_cc[VREPRINT], CRPRNT);
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#endif
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mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART);
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mode.c_cc[VSTOP] = CHK(mode.c_cc[VSTOP], CSTOP);
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mode.c_cc[VSUSP] = CHK(mode.c_cc[VSUSP], CSUSP);
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#if defined(VWERASE) && defined(CWERASE)
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mode.c_cc[VWERASE] = CHK(mode.c_cc[VWERASE], CWERASE);
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#endif
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mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | ISTRIP | INLCR | IGNCR
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#ifdef IUCLC
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| IUCLC
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#endif
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#ifdef IXANY
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| IXANY
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#endif
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| IXOFF);
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mode.c_iflag |= (BRKINT | IGNPAR | ICRNL | IXON
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#ifdef IMAXBEL
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| IMAXBEL
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#endif
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);
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mode.c_oflag &= ~(0
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#ifdef OLCUC
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| OLCUC
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#endif
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#ifdef OCRNL
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| OCRNL
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#endif
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#ifdef ONOCR
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| ONOCR
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#endif
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#ifdef ONLRET
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| ONLRET
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#endif
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#ifdef OFILL
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| OFILL
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#endif
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#ifdef OFDEL
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| OFDEL
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#endif
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#ifdef NLDLY
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| NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY
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#endif
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);
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mode.c_oflag |= (OPOST
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#ifdef ONLCR
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| ONLCR
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#endif
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);
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mode.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD);
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mode.c_cflag |= (CS8 | CREAD);
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mode.c_lflag &= ~(ECHONL | NOFLSH | TOSTOP
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#ifdef ECHOPTR
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| ECHOPRT
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#endif
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#ifdef XCASE
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| XCASE
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#endif
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);
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mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOE | ECHOK
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#ifdef ECHOCTL
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| ECHOCTL
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#endif
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#ifdef ECHOKE
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| ECHOKE
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#endif
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);
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tcsetattr(STDERR_FILENO, TCSADRAIN, &mode);
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}
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/*
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* Determine the erase, interrupt, and kill characters from the terminfo
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* entry and command line and update their values in 'mode'.
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*/
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void
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set_control_chars(int erasechar, int intrchar, int killchar)
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{
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if (mode.c_cc[VERASE] == 0 || erasechar != 0) {
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if (erasechar == 0) {
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if (over_strike &&
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key_backspace != NULL &&
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key_backspace[1] == '\0')
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mode.c_cc[VERASE] = key_backspace[1];
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else
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mode.c_cc[VERASE] = CERASE;
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} else
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mode.c_cc[VERASE] = erasechar;
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}
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if (mode.c_cc[VINTR] == 0 || intrchar != 0)
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mode.c_cc[VINTR] = intrchar ? intrchar : CINTR;
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if (mode.c_cc[VKILL] == 0 || killchar != 0)
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mode.c_cc[VKILL] = killchar ? killchar : CKILL;
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}
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/*
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* Set up various conversions in 'mode', including parity, tabs, returns,
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* echo, and case, according to the terminfo entry. If the program we're
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* running was named with a leading upper-case character, map external
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* uppercase to internal lowercase.
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*/
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void
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set_conversions(int usingupper)
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{
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#ifdef ONLCR
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mode.c_oflag |= ONLCR;
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#endif
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mode.c_iflag |= ICRNL;
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mode.c_lflag |= ECHO;
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mode.c_oflag |= OXTABS;
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if (newline != NULL && newline[0] == '\n' && !newline[1]) { /* Newline, not linefeed. */
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#ifdef ONLCR
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mode.c_oflag &= ~ONLCR;
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#endif
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mode.c_iflag &= ~ICRNL;
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}
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if (tab) /* Print tabs. */
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mode.c_oflag &= ~OXTABS;
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mode.c_lflag |= (ECHOE | ECHOK);
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}
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/* Output startup string. */
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void
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set_init(void)
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{
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const char *bp;
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int settle;
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#ifdef TAB3
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if (oldmode.c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) {
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oldmode.c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET);
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tcsetattr(STDERR_FILENO, TCSADRAIN, &oldmode);
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}
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#endif
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settle = set_tabs();
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if (isreset) {
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if (reset_1string) {
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tputs(reset_1string, 0, outc);
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settle = 1;
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}
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if (reset_2string) {
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tputs(reset_2string, 0, outc);
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settle = 1;
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}
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if ((bp = reset_file) || (bp = init_file)) {
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tset_cat(bp);
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settle = 1;
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}
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}
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if (settle) {
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(void)putc('\r', stderr);
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(void)fflush(stderr);
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(void)sleep(1); /* Settle the terminal. */
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}
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}
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/*
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* Set the hardware tabs on the terminal, using the ct (clear all tabs),
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* st (set one tab) and ch (horizontal cursor addressing) capabilities.
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* This is done before if and is, so they can patch in case we blow this.
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* Return nonzero if we set any tab stops, zero if not.
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*/
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static int
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set_tabs(void)
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{
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int c;
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char *out;
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if (set_tab) {
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if (clear_all_tabs) {
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(void)putc('\r', stderr); /* Force to left margin. */
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tputs(clear_all_tabs, 0, outc);
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}
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for (c = 8; c < ncolumns; c += 8) {
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if (column_address)
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out = tiparm(column_address, c);
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else
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out = NULL;
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if (out)
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tputs(out, 1, outc);
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else
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(void)fprintf(stderr, "%s", " ");
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/* Set the tab. */
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tputs(set_tab, 0, outc);
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}
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putc('\r', stderr);
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return (1);
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}
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return (0);
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}
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