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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)init_disp.c 8.2 (Berkeley) 2/16/94 30 * $FreeBSD: src/usr.bin/talk/init_disp.c,v 1.11.2.1 2001/07/30 10:31:29 dd Exp $ 31 */ 32 33 /* 34 * Initialization code for the display package, 35 * as well as the signal handling routines. 36 */ 37 38 #include <err.h> 39 #include <signal.h> 40 #include <stdlib.h> 41 #include <sys/stat.h> 42 #include <unistd.h> 43 #include <termios.h> 44 #include "talk.h" 45 46 /* 47 * Make sure the callee can write to the screen 48 */ 49 void 50 check_writeable(void) 51 { 52 char *tty; 53 struct stat sb; 54 55 if ((tty = ttyname(STDERR_FILENO)) == NULL) 56 err(1, "ttyname"); 57 if (stat(tty, &sb) < 0) 58 err(1, "%s", tty); 59 if (!(sb.st_mode & S_IWGRP)) 60 errx(1, "The callee cannot write to this terminal, use \"mesg y\"."); 61 } 62 63 /* 64 * Set up curses, catch the appropriate signals, 65 * and build the various windows. 66 */ 67 void 68 init_display(void) 69 { 70 struct sigaction sa; 71 72 if (initscr() == NULL) 73 errx(1, "Terminal type unset or lacking necessary features."); 74 (void) sigaction(SIGTSTP, NULL, &sa); 75 sigaddset(&sa.sa_mask, SIGALRM); 76 (void) sigaction(SIGTSTP, &sa, NULL); 77 curses_initialized = 1; 78 clear(); 79 refresh(); 80 noecho(); 81 crmode(); 82 signal(SIGINT, sig_sent); 83 signal(SIGPIPE, sig_sent); 84 /* curses takes care of ^Z */ 85 my_win.x_nlines = LINES / 2; 86 my_win.x_ncols = COLS; 87 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 88 idlok(my_win.x_win, TRUE); 89 scrollok(my_win.x_win, TRUE); 90 wclear(my_win.x_win); 91 92 his_win.x_nlines = LINES / 2 - 1; 93 his_win.x_ncols = COLS; 94 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 95 my_win.x_nlines+1, 0); 96 idlok(my_win.x_win, TRUE); 97 scrollok(his_win.x_win, TRUE); 98 wclear(his_win.x_win); 99 100 line_win = newwin(1, COLS, my_win.x_nlines, 0); 101 #if defined(hline) || defined(whline) || defined(NCURSES_VERSION) 102 whline(line_win, 0, COLS); 103 #else 104 box(line_win, '-', '-'); 105 #endif 106 wrefresh(line_win); 107 /* let them know we are working on it */ 108 current_state = "No connection yet"; 109 } 110 111 /* 112 * Trade edit characters with the other talk. By agreement 113 * the first three characters each talk transmits after 114 * connection are the three edit characters. 115 */ 116 void 117 set_edit_chars(void) 118 { 119 char buf[3]; 120 int cc; 121 struct termios tio; 122 123 tcgetattr(0, &tio); 124 my_win.cerase = tio.c_cc[VERASE]; 125 my_win.kill = tio.c_cc[VKILL]; 126 my_win.werase = tio.c_cc[VWERASE]; 127 if (my_win.cerase == (char)_POSIX_VDISABLE) 128 my_win.kill = CERASE; 129 if (my_win.kill == (char)_POSIX_VDISABLE) 130 my_win.kill = CKILL; 131 if (my_win.werase == (char)_POSIX_VDISABLE) 132 my_win.werase = CWERASE; 133 buf[0] = my_win.cerase; 134 buf[1] = my_win.kill; 135 buf[2] = my_win.werase; 136 cc = write(sockt, buf, sizeof(buf)); 137 if (cc != sizeof(buf) ) 138 p_error("Lost the connection"); 139 cc = read(sockt, buf, sizeof(buf)); 140 if (cc != sizeof(buf) ) 141 p_error("Lost the connection"); 142 his_win.cerase = buf[0]; 143 his_win.kill = buf[1]; 144 his_win.werase = buf[2]; 145 } 146 147 /* ARGSUSED */ 148 void 149 sig_sent(int signo __unused) 150 { 151 152 message("Connection closing. Exiting"); 153 quit(); 154 } 155 156 /* 157 * All done talking...hang up the phone and reset terminal thingy's 158 */ 159 void 160 quit(void) 161 { 162 163 if (curses_initialized) { 164 wmove(his_win.x_win, his_win.x_nlines-1, 0); 165 wclrtoeol(his_win.x_win); 166 wrefresh(his_win.x_win); 167 endwin(); 168 } 169 if (invitation_waiting) 170 send_delete(); 171 exit(0); 172 } 173