/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1983, 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.
*/
#ifndef lint
static const char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94";
#endif
/*
* Initialization code for the display package,
* as well as the signal handling routines.
*/
#include <sys/stat.h>
#include <err.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include "talk.h"
/*
* Make sure the callee can write to the screen
*/
void
check_writeable(void)
{
char *tty;
struct stat sb;
if ((tty = ttyname(STDERR_FILENO)) == NULL)
err(1, "ttyname");
if (stat(tty, &sb) < 0)
err(1, "%s", tty);
if (!(sb.st_mode & S_IWGRP))
errx(1, "The callee cannot write to this terminal, use \"mesg y\".");
}
/*
* Set up curses, catch the appropriate signals,
* and build the various windows.
*/
void
init_display(void)
{
struct sigaction sa;
if (initscr() == NULL)
errx(1, "Terminal type unset or lacking necessary features.");
(void) sigaction(SIGTSTP, (struct sigaction *)0, &sa);
sigaddset(&sa.sa_mask, SIGALRM);
(void) sigaction(SIGTSTP, &sa, (struct sigaction *)0);
curses_initialized = 1;
clear();
refresh();
noecho();
crmode();
signal(SIGINT, sig_sent);
signal(SIGPIPE, sig_sent);
signal(SIGWINCH, sig_winch);
/* curses takes care of ^Z */
my_win.x_nlines = LINES / 2;
my_win.x_ncols = COLS;
my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
idlok(my_win.x_win, TRUE);
scrollok(my_win.x_win, TRUE);
wclear(my_win.x_win);
his_win.x_nlines = LINES / 2 - 1;
his_win.x_ncols = COLS;
his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
my_win.x_nlines+1, 0);
idlok(my_win.x_win, TRUE);
scrollok(his_win.x_win, TRUE);
wclear(his_win.x_win);
line_win = newwin(1, COLS, my_win.x_nlines, 0);
#if defined(hline) || defined(whline) || defined(NCURSES_VERSION)
whline(line_win, 0, COLS);
#else
box(line_win, '-', '-');
#endif
wrefresh(line_win);
/* let them know we are working on it */
current_state = "No connection yet";
}
/*
* Trade edit characters with the other talk. By agreement
* the first three characters each talk transmits after
* connection are the three edit characters.
*/
void
set_edit_chars(void)
{
char buf[3];
int cc;
struct termios tio;
tcgetattr(0, &tio);
my_win.cerase = tio.c_cc[VERASE];
my_win.kill = tio.c_cc[VKILL];
my_win.werase = tio.c_cc[VWERASE];
if (my_win.cerase == (char)_POSIX_VDISABLE)
my_win.kill = CERASE;
if (my_win.kill == (char)_POSIX_VDISABLE)
my_win.kill = CKILL;
if (my_win.werase == (char)_POSIX_VDISABLE)
my_win.werase = CWERASE;
buf[0] = my_win.cerase;
buf[1] = my_win.kill;
buf[2] = my_win.werase;
cc = write(sockt, buf, sizeof(buf));
if (cc != sizeof(buf) )
p_error("Lost the connection");
cc = read(sockt, buf, sizeof(buf));
if (cc != sizeof(buf) )
p_error("Lost the connection");
his_win.cerase = buf[0];
his_win.kill = buf[1];
his_win.werase = buf[2];
}
/* ARGSUSED */
void
sig_sent(int signo __unused)
{
message("Connection closing. Exiting");
quit();
}
void
sig_winch(int dummy __unused)
{
gotwinch = 1;
}
/*
* All done talking...hang up the phone and reset terminal thingy's
*/
void
quit(void)
{
if (curses_initialized) {
wmove(his_win.x_win, his_win.x_nlines-1, 0);
wclrtoeol(his_win.x_win);
wrefresh(his_win.x_win);
endwin();
}
if (invitation_waiting)
send_delete();
exit(0);
}
/*
* If we get SIGWINCH, recompute both window sizes and refresh things.
*/
void
resize_display(void)
{
struct winsize ws;
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0 ||
(ws.ws_row == LINES && ws.ws_col == COLS))
return;
/* Update curses' internal state with new window size. */
resizeterm(ws.ws_row, ws.ws_col);
/*
* Resize each window but wait to refresh the screen until
* everything has been drawn so the cursor is in the right spot.
*/
my_win.x_nlines = LINES / 2;
my_win.x_ncols = COLS;
wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols);
mvwin(my_win.x_win, 0, 0);
clearok(my_win.x_win, TRUE);
his_win.x_nlines = LINES / 2 - 1;
his_win.x_ncols = COLS;
wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols);
mvwin(his_win.x_win, my_win.x_nlines + 1, 0);
clearok(his_win.x_win, TRUE);
wresize(line_win, 1, COLS);
mvwin(line_win, my_win.x_nlines, 0);
#if defined(NCURSES_VERSION) || defined(whline)
whline(line_win, '-', COLS);
#else
wmove(line_win, my_win.x_nlines, 0);
box(line_win, '-', '-');
#endif
/* Now redraw the screen. */
wrefresh(his_win.x_win);
wrefresh(line_win);
wrefresh(my_win.x_win);
}
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