1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef lint 39 static const char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94"; 40 #endif 41 42 /* 43 * Initialization code for the display package, 44 * as well as the signal handling routines. 45 */ 46 47 #include <sys/stat.h> 48 49 #include <err.h> 50 #include <signal.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 #include <termios.h> 54 55 #include "talk.h" 56 57 /* 58 * Make sure the callee can write to the screen 59 */ 60 void 61 check_writeable() 62 { 63 char *tty; 64 struct stat sb; 65 66 if ((tty = ttyname(STDERR_FILENO)) == NULL) 67 err(1, "ttyname"); 68 if (stat(tty, &sb) < 0) 69 err(1, "%s", tty); 70 if (!(sb.st_mode & S_IWGRP)) 71 errx(1, "The callee cannot write to this terminal, use \"mesg y\"."); 72 } 73 74 /* 75 * Set up curses, catch the appropriate signals, 76 * and build the various windows. 77 */ 78 void 79 init_display() 80 { 81 struct sigaction sa; 82 83 if (initscr() == NULL) 84 errx(1, "Terminal type unset or lacking necessary features."); 85 (void) sigaction(SIGTSTP, (struct sigaction *)0, &sa); 86 sigaddset(&sa.sa_mask, SIGALRM); 87 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 88 curses_initialized = 1; 89 clear(); 90 refresh(); 91 noecho(); 92 crmode(); 93 signal(SIGINT, sig_sent); 94 signal(SIGPIPE, sig_sent); 95 /* curses takes care of ^Z */ 96 my_win.x_nlines = LINES / 2; 97 my_win.x_ncols = COLS; 98 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 99 idlok(my_win.x_win, TRUE); 100 scrollok(my_win.x_win, TRUE); 101 wclear(my_win.x_win); 102 103 his_win.x_nlines = LINES / 2 - 1; 104 his_win.x_ncols = COLS; 105 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 106 my_win.x_nlines+1, 0); 107 idlok(my_win.x_win, TRUE); 108 scrollok(his_win.x_win, TRUE); 109 wclear(his_win.x_win); 110 111 line_win = newwin(1, COLS, my_win.x_nlines, 0); 112 #if defined(hline) || defined(whline) || defined(NCURSES_VERSION) 113 whline(line_win, 0, COLS); 114 #else 115 box(line_win, '-', '-'); 116 #endif 117 wrefresh(line_win); 118 /* let them know we are working on it */ 119 current_state = "No connection yet"; 120 } 121 122 /* 123 * Trade edit characters with the other talk. By agreement 124 * the first three characters each talk transmits after 125 * connection are the three edit characters. 126 */ 127 void 128 set_edit_chars() 129 { 130 char buf[3]; 131 int cc; 132 struct termios tio; 133 134 tcgetattr(0, &tio); 135 my_win.cerase = tio.c_cc[VERASE]; 136 my_win.kill = tio.c_cc[VKILL]; 137 my_win.werase = tio.c_cc[VWERASE]; 138 if (my_win.cerase == (char)_POSIX_VDISABLE) 139 my_win.kill = CERASE; 140 if (my_win.kill == (char)_POSIX_VDISABLE) 141 my_win.kill = CKILL; 142 if (my_win.werase == (char)_POSIX_VDISABLE) 143 my_win.werase = CWERASE; 144 buf[0] = my_win.cerase; 145 buf[1] = my_win.kill; 146 buf[2] = my_win.werase; 147 cc = write(sockt, buf, sizeof(buf)); 148 if (cc != sizeof(buf) ) 149 p_error("Lost the connection"); 150 cc = read(sockt, buf, sizeof(buf)); 151 if (cc != sizeof(buf) ) 152 p_error("Lost the connection"); 153 his_win.cerase = buf[0]; 154 his_win.kill = buf[1]; 155 his_win.werase = buf[2]; 156 } 157 158 /* ARGSUSED */ 159 void 160 sig_sent(signo) 161 int signo __unused; 162 { 163 164 message("Connection closing. Exiting"); 165 quit(); 166 } 167 168 /* 169 * All done talking...hang up the phone and reset terminal thingy's 170 */ 171 void 172 quit() 173 { 174 175 if (curses_initialized) { 176 wmove(his_win.x_win, his_win.x_nlines-1, 0); 177 wclrtoeol(his_win.x_win); 178 wrefresh(his_win.x_win); 179 endwin(); 180 } 181 if (invitation_waiting) 182 send_delete(); 183 exit(0); 184 } 185