NetBSD/lib/libcurses/tty.c

672 lines
16 KiB
C

/* $NetBSD: tty.c,v 1.43 2011/08/29 11:07:38 christos Exp $ */
/*-
* Copyright (c) 1992, 1993, 1994
* 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[] = "@(#)tty.c 8.6 (Berkeley) 1/10/95";
#else
__RCSID("$NetBSD: tty.c,v 1.43 2011/08/29 11:07:38 christos Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include "curses.h"
#include "curses_private.h"
/*
* In general, curses should leave tty hardware settings alone (speed, parity,
* word size). This is most easily done in BSD by using TCSASOFT on all
* tcsetattr calls. On other systems, it would be better to get and restore
* those attributes at each change, or at least when stopped and restarted.
* See also the comments in getterm().
*/
#ifndef TCSASOFT
#define TCSASOFT 0
#endif
int __tcaction = TCSASOFT != 0; /* Ignore hardware settings */
#ifndef OXTABS
#ifdef XTABS /* SMI uses XTABS. */
#define OXTABS XTABS
#else
#define OXTABS 0
#endif
#endif
/*
* baudrate --
* Return the current baudrate
*/
int
baudrate(void)
{
if (_cursesi_screen->notty == TRUE)
return 0;
return cfgetospeed(&_cursesi_screen->baset);
}
/*
* gettmode --
* Do terminal type initialization.
*/
int
gettmode(void)
{
if (_cursesi_gettmode(_cursesi_screen) == ERR)
return ERR;
__GT = _cursesi_screen->GT;
__NONL = _cursesi_screen->NONL;
return OK;
}
/*
* _cursesi_gettmode --
* Do the terminal type initialisation for the tty attached to the
* given screen.
*/
int
_cursesi_gettmode(SCREEN *screen)
{
screen->useraw = 0;
if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) {
/* if the input fd is not a tty try the output */
if (tcgetattr(fileno(screen->infd), &screen->orig_termios)) {
/* not a tty ... we will disable tty related stuff */
screen->notty = TRUE;
__GT = 0;
__NONL = 0;
return OK;
}
}
screen->baset = screen->orig_termios;
screen->baset.c_oflag &= ~OXTABS;
screen->GT = 0; /* historical. was used before we wired OXTABS off */
screen->NONL = (screen->baset.c_oflag & ONLCR) == 0;
/*
* XXX
* System V and SMI systems overload VMIN and VTIME, such that
* VMIN is the same as the VEOF element, and VTIME is the same
* as the VEOL element. This means that, if VEOF was ^D, the
* default VMIN is 4. Majorly stupid.
*/
screen->cbreakt = screen->baset;
screen->cbreakt.c_lflag &= ~(ECHO | ECHONL | ICANON);
screen->cbreakt.c_cc[VMIN] = 1;
screen->cbreakt.c_cc[VTIME] = 0;
screen->rawt = screen->cbreakt;
screen->rawt.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | INLCR | IGNCR |
ICRNL | IXON);
screen->rawt.c_oflag &= ~OPOST;
screen->rawt.c_lflag &= ~(ISIG | IEXTEN);
#if TCSASOFT == 0
/*
* In general, curses should leave hardware-related settings alone.
* This includes parity and word size. Older versions set the tty
* to 8 bits, no parity in raw(), but this is considered to be an
* artifact of the old tty interface. If it's desired to change
* parity and word size, the TCSASOFT bit has to be removed from the
* calls that switch to/from "raw" mode.
*/
screen->rawt.c_iflag &= ~ISTRIP;
screen->rawt.c_cflag &= ~(CSIZE | PARENB);
screen->rawt.c_cflag |= CS8;
#endif
screen->curt = &screen->baset;
return tcsetattr(fileno(screen->infd), TCSASOFT | TCSADRAIN,
screen->curt) ? ERR : OK;
}
/*
* raw --
* Put the terminal into raw mode
*/
int
raw(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "raw()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
_cursesi_screen->useraw = __pfast = __rawmode = 1;
_cursesi_screen->curt = &_cursesi_screen->rawt;
if (_cursesi_screen->notty == TRUE)
return OK;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
_cursesi_screen->curt) ? ERR : OK;
}
/*
* noraw --
* Put the terminal into cooked mode
*/
int
noraw(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "noraw()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
_cursesi_screen->useraw = __pfast = __rawmode = 0;
if (_cursesi_screen->notty == TRUE)
return OK;
_cursesi_screen->curt = &_cursesi_screen->baset;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
_cursesi_screen->curt) ? ERR : OK;
}
/*
* cbreak --
* Enable cbreak mode
*/
int
cbreak(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "cbreak()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
__rawmode = 1;
if (_cursesi_screen->notty == TRUE)
return OK;
_cursesi_screen->curt = _cursesi_screen->useraw ?
&_cursesi_screen->rawt : &_cursesi_screen->cbreakt;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
_cursesi_screen->curt) ? ERR : OK;
}
/*
* nocbreak --
* Disable cbreak mode
*/
int
nocbreak(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "nocbreak()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
__rawmode = 0;
if (_cursesi_screen->notty == TRUE)
return OK;
/* if we were in halfdelay mode then nuke the timeout */
if ((_cursesi_screen->half_delay == TRUE) &&
(__notimeout() == ERR))
return ERR;
_cursesi_screen->half_delay = FALSE;
_cursesi_screen->curt = _cursesi_screen->useraw ?
&_cursesi_screen->rawt : &_cursesi_screen->baset;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
_cursesi_screen->curt) ? ERR : OK;
}
/*
* halfdelay --
* Put the terminal into cbreak mode with the specified timeout.
*
*/
int
halfdelay(int duration)
{
if ((duration < 1) || (duration > 255))
return ERR;
if (cbreak() == ERR)
return ERR;
if (__timeout(duration) == ERR)
return ERR;
_cursesi_screen->half_delay = TRUE;
return OK;
}
int
__delay(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "__delay()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return OK;
_cursesi_screen->rawt.c_cc[VMIN] = 1;
_cursesi_screen->rawt.c_cc[VTIME] = 0;
_cursesi_screen->cbreakt.c_cc[VMIN] = 1;
_cursesi_screen->cbreakt.c_cc[VTIME] = 0;
_cursesi_screen->baset.c_cc[VMIN] = 1;
_cursesi_screen->baset.c_cc[VTIME] = 0;
if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW,
_cursesi_screen->curt)) {
__restore_termios();
return ERR;
}
return OK;
}
int
__nodelay(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "__nodelay()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return OK;
_cursesi_screen->rawt.c_cc[VMIN] = 0;
_cursesi_screen->rawt.c_cc[VTIME] = 0;
_cursesi_screen->cbreakt.c_cc[VMIN] = 0;
_cursesi_screen->cbreakt.c_cc[VTIME] = 0;
_cursesi_screen->baset.c_cc[VMIN] = 0;
_cursesi_screen->baset.c_cc[VTIME] = 0;
if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW,
_cursesi_screen->curt)) {
__restore_termios();
return ERR;
}
return OK;
}
void
__save_termios(void)
{
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return;
_cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN];
_cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME];
}
void
__restore_termios(void)
{
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return;
_cursesi_screen->rawt.c_cc[VMIN] = _cursesi_screen->ovmin;
_cursesi_screen->rawt.c_cc[VTIME] = _cursesi_screen->ovtime;
_cursesi_screen->cbreakt.c_cc[VMIN] = _cursesi_screen->ovmin;
_cursesi_screen->cbreakt.c_cc[VTIME] = _cursesi_screen->ovtime;
_cursesi_screen->baset.c_cc[VMIN] = _cursesi_screen->ovmin;
_cursesi_screen->baset.c_cc[VTIME] = _cursesi_screen->ovtime;
}
int
__timeout(int delay)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "__timeout()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return OK;
_cursesi_screen->ovmin = _cursesi_screen->cbreakt.c_cc[VMIN];
_cursesi_screen->ovtime = _cursesi_screen->cbreakt.c_cc[VTIME];
_cursesi_screen->rawt.c_cc[VMIN] = 0;
_cursesi_screen->rawt.c_cc[VTIME] = delay;
_cursesi_screen->cbreakt.c_cc[VMIN] = 0;
_cursesi_screen->cbreakt.c_cc[VTIME] = delay;
_cursesi_screen->baset.c_cc[VMIN] = 0;
_cursesi_screen->baset.c_cc[VTIME] = delay;
if (tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW,
_cursesi_screen->curt)) {
__restore_termios();
return ERR;
}
return OK;
}
int
__notimeout(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "__notimeout()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return OK;
_cursesi_screen->rawt.c_cc[VMIN] = 1;
_cursesi_screen->rawt.c_cc[VTIME] = 0;
_cursesi_screen->cbreakt.c_cc[VMIN] = 1;
_cursesi_screen->cbreakt.c_cc[VTIME] = 0;
_cursesi_screen->baset.c_cc[VMIN] = 1;
_cursesi_screen->baset.c_cc[VTIME] = 0;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSANOW,
_cursesi_screen->curt) ? ERR : OK;
}
int
echo(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "echo()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
__echoit = 1;
return OK;
}
int
noecho(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "noecho()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
__echoit = 0;
return OK;
}
int
nl(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "nl()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return OK;
_cursesi_screen->rawt.c_iflag |= ICRNL;
_cursesi_screen->rawt.c_oflag |= ONLCR;
_cursesi_screen->cbreakt.c_iflag |= ICRNL;
_cursesi_screen->cbreakt.c_oflag |= ONLCR;
_cursesi_screen->baset.c_iflag |= ICRNL;
_cursesi_screen->baset.c_oflag |= ONLCR;
_cursesi_screen->nl = 1;
_cursesi_screen->pfast = _cursesi_screen->rawmode;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
_cursesi_screen->curt) ? ERR : OK;
}
int
nonl(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "nonl()\n");
#endif
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return OK;
_cursesi_screen->rawt.c_iflag &= ~ICRNL;
_cursesi_screen->rawt.c_oflag &= ~ONLCR;
_cursesi_screen->cbreakt.c_iflag &= ~ICRNL;
_cursesi_screen->cbreakt.c_oflag &= ~ONLCR;
_cursesi_screen->baset.c_iflag &= ~ICRNL;
_cursesi_screen->baset.c_oflag &= ~ONLCR;
_cursesi_screen->nl = 0;
__pfast = 1;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
_cursesi_screen->curt) ? ERR : OK;
}
#ifndef _CURSES_USE_MACROS
void
noqiflush(void)
{
(void) intrflush(stdscr, FALSE);
}
void
qiflush(void)
{
(void) intrflush(stdscr, TRUE);
}
#endif /* _CURSES_USE_MACROS */
int
intrflush(WINDOW *win, bool bf) /*ARGSUSED*/
{
/* Check if we need to restart ... */
if (_cursesi_screen->endwin)
__restartwin();
if (_cursesi_screen->notty == TRUE)
return OK;
if (bf) {
_cursesi_screen->rawt.c_lflag &= ~NOFLSH;
_cursesi_screen->cbreakt.c_lflag &= ~NOFLSH;
_cursesi_screen->baset.c_lflag &= ~NOFLSH;
} else {
_cursesi_screen->rawt.c_lflag |= NOFLSH;
_cursesi_screen->cbreakt.c_lflag |= NOFLSH;
_cursesi_screen->baset.c_lflag |= NOFLSH;
}
__pfast = 1;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
_cursesi_screen->curt) ? ERR : OK;
}
void
__startwin(SCREEN *screen)
{
(void) fflush(screen->infd);
/*
* Some C libraries default to a 1K buffer when talking to a tty.
* With a larger screen, especially across a network, we'd like
* to get it to all flush in a single write. Make it twice as big
* as just the characters (so that we have room for cursor motions
* and attribute information) but no more than 8K.
*/
if (screen->stdbuf == NULL) {
screen->len = LINES * COLS * 2;
if (screen->len > 8192)
screen->len = 8192;
if ((screen->stdbuf = malloc(screen->len)) == NULL)
screen->len = 0;
}
(void) setvbuf(screen->outfd, screen->stdbuf, _IOFBF, screen->len);
ti_puts(screen->term, t_enter_ca_mode(screen->term), 0,
__cputchar_args, (void *) screen->outfd);
ti_puts(screen->term, t_cursor_normal(screen->term), 0,
__cputchar_args, (void *) screen->outfd);
if (screen->curscr->flags & __KEYPAD)
ti_puts(screen->term, t_keypad_xmit(screen->term), 0,
__cputchar_args, (void *) screen->outfd);
screen->endwin = 0;
}
int
endwin(void)
{
#ifdef DEBUG
__CTRACE(__CTRACE_MISC, "endwin\n");
#endif
return __stopwin();
}
bool
isendwin(void)
{
return _cursesi_screen->endwin ? TRUE : FALSE;
}
int
flushinp(void)
{
(void) fpurge(_cursesi_screen->infd);
return OK;
}
/*
* The following routines, savetty and resetty are completely useless and
* are left in only as stubs. If people actually use them they will almost
* certainly screw up the state of the world.
*/
/*static struct termios savedtty;*/
int
savetty(void)
{
if (_cursesi_screen->notty == TRUE)
return OK;
return tcgetattr(fileno(_cursesi_screen->infd),
&_cursesi_screen->savedtty) ? ERR : OK;
}
int
resetty(void)
{
if (_cursesi_screen->notty == TRUE)
return OK;
return tcsetattr(fileno(_cursesi_screen->infd), TCSASOFT | TCSADRAIN,
&_cursesi_screen->savedtty) ? ERR : OK;
}
/*
* erasechar --
* Return the character of the erase key.
*/
char
erasechar(void)
{
if (_cursesi_screen->notty == TRUE)
return 0;
return _cursesi_screen->baset.c_cc[VERASE];
}
/*
* killchar --
* Return the character of the kill key.
*/
char
killchar(void)
{
if (_cursesi_screen->notty == TRUE)
return 0;
return _cursesi_screen->baset.c_cc[VKILL];
}
/*
* erasewchar --
* Return the wide character of the erase key.
*/
int
erasewchar( wchar_t *ch )
{
#ifndef HAVE_WCHAR
return ERR;
#else
if (_cursesi_screen->notty == TRUE)
return ERR;
*ch = _cursesi_screen->baset.c_cc[VERASE];
return OK;
#endif /* HAVE_WCHAR */
}
/*
* killwchar --
* Return the wide character of the kill key.
*/
int
killwchar( wchar_t *ch )
{
#ifndef HAVE_WCHAR
return ERR;
#else
if (_cursesi_screen->notty == TRUE)
return 0;
*ch = _cursesi_screen->baset.c_cc[VKILL];
return OK;
#endif /* HAVE_WCHAR */
}