init_disp.c revision 17698
11590Srgrimes/* 21590Srgrimes * Copyright (c) 1983, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 3. All advertising materials mentioning features or use of this software 141590Srgrimes * must display the following acknowledgement: 151590Srgrimes * This product includes software developed by the University of 161590Srgrimes * California, Berkeley and its contributors. 171590Srgrimes * 4. Neither the name of the University nor the names of its contributors 181590Srgrimes * may be used to endorse or promote products derived from this software 191590Srgrimes * without specific prior written permission. 201590Srgrimes * 211590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311590Srgrimes * SUCH DAMAGE. 321590Srgrimes */ 331590Srgrimes 341590Srgrimes#ifndef lint 351590Srgrimesstatic char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94"; 361590Srgrimes#endif /* not lint */ 371590Srgrimes 381590Srgrimes/* 391590Srgrimes * Initialization code for the display package, 401590Srgrimes * as well as the signal handling routines. 411590Srgrimes */ 421590Srgrimes 435297Sache#include <sys/types.h> 445297Sache#include <sys/stat.h> 4517676Speter#include <sys/termios.h> 4617676Speter#include <sys/ttydefaults.h> 471590Srgrimes 485297Sache#include <unistd.h> 491590Srgrimes#include <signal.h> 501590Srgrimes#include <err.h> 511590Srgrimes#include "talk.h" 521590Srgrimes 538874Srgrimes/* 545297Sache * Make sure the callee can write to the screen 555297Sache */ 5614443Sjoergvoid 5714443Sjoergcheck_writeable() 585297Sache{ 595297Sache char *tty; 605297Sache struct stat sb; 615297Sache 625297Sache if ((tty = ttyname(STDERR_FILENO)) == NULL) 635297Sache err(1, "ttyname"); 645297Sache if (stat(tty, &sb) < 0) 655297Sache err(1, "%s", tty); 665297Sache if (!(sb.st_mode & S_IWGRP)) 675297Sache errx(1, "The callee cannot write to this terminal, use \"mesg y\"."); 685297Sache} 695297Sache 708874Srgrimes/* 711590Srgrimes * Set up curses, catch the appropriate signals, 721590Srgrimes * and build the various windows. 731590Srgrimes */ 7414443Sjoergvoid 751590Srgrimesinit_display() 761590Srgrimes{ 7717676Speter struct sigaction sa; 781590Srgrimes 791590Srgrimes if (initscr() == NULL) 801590Srgrimes errx(1, "Terminal type unset or lacking necessary features."); 8117676Speter (void) sigaction(SIGTSTP, (struct sigaction *)0, &sa); 8217676Speter sigaddset(&sa.sa_mask, SIGALRM); 8317676Speter (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 841590Srgrimes curses_initialized = 1; 851590Srgrimes clear(); 861590Srgrimes refresh(); 871590Srgrimes noecho(); 881590Srgrimes crmode(); 891590Srgrimes signal(SIGINT, sig_sent); 901590Srgrimes signal(SIGPIPE, sig_sent); 911590Srgrimes /* curses takes care of ^Z */ 921590Srgrimes my_win.x_nlines = LINES / 2; 931590Srgrimes my_win.x_ncols = COLS; 941590Srgrimes my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 952929Sache scrollok(my_win.x_win, TRUE); 961590Srgrimes wclear(my_win.x_win); 971590Srgrimes 981590Srgrimes his_win.x_nlines = LINES / 2 - 1; 991590Srgrimes his_win.x_ncols = COLS; 1001590Srgrimes his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 1011590Srgrimes my_win.x_nlines+1, 0); 1022929Sache scrollok(his_win.x_win, TRUE); 1031590Srgrimes wclear(his_win.x_win); 1041590Srgrimes 1051590Srgrimes line_win = newwin(1, COLS, my_win.x_nlines, 0); 10617698Speter#if defined(hline) || defined(whline) || defined(NCURSES_VERSION) 10717698Speter whline(line_win, 0, COLS); 10817698Speter#else 10917698Speter box(line_win, '-', '-'); 11017698Speter#endif 1111590Srgrimes wrefresh(line_win); 1121590Srgrimes /* let them know we are working on it */ 1131590Srgrimes current_state = "No connection yet"; 1141590Srgrimes} 1151590Srgrimes 1161590Srgrimes/* 1171590Srgrimes * Trade edit characters with the other talk. By agreement 1181590Srgrimes * the first three characters each talk transmits after 1191590Srgrimes * connection are the three edit characters. 1201590Srgrimes */ 12114443Sjoergvoid 1221590Srgrimesset_edit_chars() 1231590Srgrimes{ 1241590Srgrimes char buf[3]; 1251590Srgrimes int cc; 12617676Speter struct termios tio; 1278874Srgrimes 12817676Speter tcgetattr(0, &tio); 12917676Speter my_win.cerase = tio.c_cc[VERASE]; 13017676Speter my_win.kill = tio.c_cc[VKILL]; 13117676Speter my_win.werase = tio.c_cc[VWERASE]; 13217676Speter if (my_win.cerase == (char)_POSIX_VDISABLE) 13317676Speter my_win.kill = CERASE; 13417676Speter if (my_win.kill == (char)_POSIX_VDISABLE) 13517676Speter my_win.kill = CKILL; 13617676Speter if (my_win.werase == (char)_POSIX_VDISABLE) 13717676Speter my_win.werase = CWERASE; 1381590Srgrimes buf[0] = my_win.cerase; 1391590Srgrimes buf[1] = my_win.kill; 1401590Srgrimes buf[2] = my_win.werase; 1411590Srgrimes cc = write(sockt, buf, sizeof(buf)); 1421590Srgrimes if (cc != sizeof(buf) ) 1431590Srgrimes p_error("Lost the connection"); 1441590Srgrimes cc = read(sockt, buf, sizeof(buf)); 1451590Srgrimes if (cc != sizeof(buf) ) 1461590Srgrimes p_error("Lost the connection"); 1471590Srgrimes his_win.cerase = buf[0]; 1481590Srgrimes his_win.kill = buf[1]; 1491590Srgrimes his_win.werase = buf[2]; 1501590Srgrimes} 1511590Srgrimes 15214443Sjoerg/* ARGSUSED */ 1531590Srgrimesvoid 15414443Sjoergsig_sent(signo) 15514443Sjoerg int signo; 1561590Srgrimes{ 1571590Srgrimes 1581590Srgrimes message("Connection closing. Exiting"); 1591590Srgrimes quit(); 1601590Srgrimes} 1611590Srgrimes 1621590Srgrimes/* 1631590Srgrimes * All done talking...hang up the phone and reset terminal thingy's 1641590Srgrimes */ 16514443Sjoergvoid 1661590Srgrimesquit() 1671590Srgrimes{ 1681590Srgrimes 1691590Srgrimes if (curses_initialized) { 1701590Srgrimes wmove(his_win.x_win, his_win.x_nlines-1, 0); 1711590Srgrimes wclrtoeol(his_win.x_win); 1721590Srgrimes wrefresh(his_win.x_win); 1731590Srgrimes endwin(); 1741590Srgrimes } 1751590Srgrimes if (invitation_waiting) 1761590Srgrimes send_delete(); 1771590Srgrimes exit(0); 1781590Srgrimes} 179