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NetBSD/usr.bin/tset/set.c

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/* $NetBSD: set.c,v 1.9 2003/08/07 11:16:49 agc Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)set.c 8.2 (Berkeley) 2/28/94";
#endif
__RCSID("$NetBSD: set.c,v 1.9 2003/08/07 11:16:49 agc Exp $");
#endif /* not lint */
#include <stdio.h>
#include <termcap.h>
#include <termios.h>
#include <unistd.h>
#include "extern.h"
#define CHK(val, dft) (val <= 0 ? dft : val)
int set_tabs __P((void));
/*
* Reset the terminal mode bits to a sensible state. Very useful after
* a child program dies in raw mode.
*/
void
reset_mode()
{
tcgetattr(STDERR_FILENO, &mode);
#if defined(VDISCARD) && defined(CDISCARD)
mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD);
#endif
mode.c_cc[VEOF] = CHK(mode.c_cc[VEOF], CEOF);
mode.c_cc[VERASE] = CHK(mode.c_cc[VERASE], CERASE);
#if defined(VFLUSH) && defined(CFLUSH)
mode.c_cc[VFLUSH] = CHK(mode.c_cc[VFLUSH], CFLUSH);
#endif
mode.c_cc[VINTR] = CHK(mode.c_cc[VINTR], CINTR);
mode.c_cc[VKILL] = CHK(mode.c_cc[VKILL], CKILL);
#if defined(VLNEXT) && defined(CLNEXT)
mode.c_cc[VLNEXT] = CHK(mode.c_cc[VLNEXT], CLNEXT);
#endif
mode.c_cc[VQUIT] = CHK(mode.c_cc[VQUIT], CQUIT);
#if defined(VREPRINT) && defined(CRPRNT)
mode.c_cc[VREPRINT] = CHK(mode.c_cc[VREPRINT], CRPRNT);
#endif
mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART);
mode.c_cc[VSTOP] = CHK(mode.c_cc[VSTOP], CSTOP);
mode.c_cc[VSUSP] = CHK(mode.c_cc[VSUSP], CSUSP);
#if defined(VWERASE) && defined(CWERASE)
mode.c_cc[VWERASE] = CHK(mode.c_cc[VWERASE], CWERASE);
#endif
mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | ISTRIP | INLCR | IGNCR
#ifdef IUCLC
| IUCLC
#endif
#ifdef IXANY
| IXANY
#endif
| IXOFF);
mode.c_iflag |= (BRKINT | IGNPAR | ICRNL | IXON
#ifdef IMAXBEL
| IMAXBEL
#endif
);
mode.c_oflag &= ~(0
#ifdef OLCUC
| OLCUC
#endif
#ifdef OCRNL
| OCRNL
#endif
#ifdef ONOCR
| ONOCR
#endif
#ifdef ONLRET
| ONLRET
#endif
#ifdef OFILL
| OFILL
#endif
#ifdef OFDEL
| OFDEL
#endif
#ifdef NLDLY
| NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY
#endif
);
mode.c_oflag |= (OPOST
#ifdef ONLCR
| ONLCR
#endif
);
mode.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD);
mode.c_cflag |= (CS8 | CREAD);
mode.c_lflag &= ~(ECHONL | NOFLSH | TOSTOP
#ifdef ECHOPTR
| ECHOPRT
#endif
#ifdef XCASE
| XCASE
#endif
);
mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOE | ECHOK
#ifdef ECHOCTL
| ECHOCTL
#endif
#ifdef ECHOKE
| ECHOKE
#endif
);
tcsetattr(STDERR_FILENO, TCSADRAIN, &mode);
}
/*
* Determine the erase, interrupt, and kill characters from the termcap
* entry and command line and update their values in 'mode'.
*/
void
set_control_chars()
{
char *bp, *p, bs_char, buf[1024];
bp = buf;
p = tgetstr("kb", &bp);
if (p == NULL || p[1] != '\0')
p = tgetstr("bc", &bp);
if (p != NULL && p[1] == '\0')
bs_char = p[0];
else if (tgetflag("bs"))
bs_char = CTRL('h');
else
bs_char = 0;
if (erasechar == 0 && !tgetflag("os") && mode.c_cc[VERASE] != CERASE) {
if (tgetflag("bs") || bs_char != 0)
erasechar = -1;
}
if (erasechar < 0)
erasechar = (bs_char != 0) ? bs_char : CTRL('h');
if (mode.c_cc[VERASE] == 0 || erasechar != 0)
mode.c_cc[VERASE] = erasechar ? erasechar : CERASE;
if (mode.c_cc[VINTR] == 0 || intrchar != 0)
mode.c_cc[VINTR] = intrchar ? intrchar : CINTR;
if (mode.c_cc[VKILL] == 0 || killchar != 0)
mode.c_cc[VKILL] = killchar ? killchar : CKILL;
}
/*
* Set up various conversions in 'mode', including parity, tabs, returns,
* echo, and case, according to the termcap entry. If the program we're
* running was named with a leading upper-case character, map external
* uppercase to internal lowercase.
*/
void
set_conversions(usingupper)
int usingupper;
{
if (tgetflag("UC") || usingupper) {
#ifdef IUCLC
mode.c_iflag |= IUCLC;
mode.c_oflag |= OLCUC;
#endif
} else if (tgetflag("LC")) {
#ifdef IUCLC
mode.c_iflag &= ~IUCLC;
mode.c_oflag &= ~OLCUC;
#endif
}
mode.c_iflag &= ~(PARMRK | INPCK);
mode.c_lflag |= ICANON;
if (tgetflag("EP")) {
mode.c_cflag |= PARENB;
mode.c_cflag &= ~PARODD;
}
if (tgetflag("OP")) {
mode.c_cflag |= PARENB;
mode.c_cflag |= PARODD;
}
#ifdef ONLCR
mode.c_oflag |= ONLCR;
#endif
mode.c_iflag |= ICRNL;
mode.c_lflag |= ECHO;
mode.c_oflag |= OXTABS;
if (tgetflag("NL")) { /* Newline, not linefeed. */
#ifdef ONLCR
mode.c_oflag &= ~ONLCR;
#endif
mode.c_iflag &= ~ICRNL;
}
if (tgetflag("HD")) /* Half duplex. */
mode.c_lflag &= ~ECHO;
if (tgetflag("pt")) /* Print tabs. */
mode.c_oflag &= ~OXTABS;
mode.c_lflag |= (ECHOE | ECHOK);
}
/* Output startup string. */
void
set_init()
{
char *bp, buf[1024];
int settle;
bp = buf;
if (tgetstr("pc", &bp) != 0) /* Get/set pad character. */
PC = buf[0];
#ifdef TAB3
if (oldmode.c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) {
oldmode.c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET);
tcsetattr(STDERR_FILENO, TCSADRAIN, &oldmode);
}
#endif
settle = set_tabs();
if (isreset) {
bp = buf;
if (tgetstr("rs", &bp) != 0 || tgetstr("is", &bp) != 0) {
tputs(buf, 0, outc);
settle = 1;
}
bp = buf;
if (tgetstr("rf", &bp) != 0 || tgetstr("if", &bp) != 0) {
cat(buf);
settle = 1;
}
}
if (settle) {
(void)putc('\r', stderr);
(void)fflush(stderr);
(void)sleep(1); /* Settle the terminal. */
}
}
/*
* Set the hardware tabs on the terminal, using the ct (clear all tabs),
* st (set one tab) and ch (horizontal cursor addressing) capabilities.
* This is done before if and is, so they can patch in case we blow this.
* Return nonzero if we set any tab stops, zero if not.
*/
int
set_tabs()
{
int c;
char *capsp, *clear_tabs;
char *set_column, *set_tab, *tg_out;
char caps[1024];
capsp = caps;
set_tab = tgetstr("st", &capsp);
if (set_tab && (clear_tabs = tgetstr("ct", &capsp))) {
(void)putc('\r', stderr); /* Force to left margin. */
tputs(clear_tabs, 0, outc);
}
set_column = tgetstr("ch", &capsp);
if (set_tab) {
for (c = 8; c < columns; c += 8) {
/*
* Get to the right column. "OOPS" is returned by
* tgoto() if it can't do the job. (*snarl*)
*/
tg_out = "OOPS";
if (set_column)
tg_out = tgoto(set_column, 0, c);
if (*tg_out != 'O')
tputs(tg_out, 1, outc);
else
(void)fprintf(stderr, "%s", " ");
/* Set the tab. */
tputs(set_tab, 0, outc);
}
putc('\r', stderr);
return (1);
}
return (0);
}
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