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 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD: src/usr.bin/talk/init_disp.c,v 1.11.2.1 2001/07/30 10:31:29 dd Exp $"; 40 #endif /* not lint */ 41 42 /* 43 * Initialization code for the display package, 44 * as well as the signal handling routines. 45 */ 46 47 #include <err.h> 48 #include <signal.h> 49 #include <stdlib.h> 50 #include <sys/stat.h> 51 #include <unistd.h> 52 #include <termios.h> 53 #include "talk.h" 54 55 /* 56 * Make sure the callee can write to the screen 57 */ 58 void 59 check_writeable() 60 { 61 char *tty; 62 struct stat sb; 63 64 if ((tty = ttyname(STDERR_FILENO)) == NULL) 65 err(1, "ttyname"); 66 if (stat(tty, &sb) < 0) 67 err(1, "%s", tty); 68 if (!(sb.st_mode & S_IWGRP)) 69 errx(1, "The callee cannot write to this terminal, use \"mesg y\"."); 70 } 71 72 /* 73 * Set up curses, catch the appropriate signals, 74 * and build the various windows. 75 */ 76 void 77 init_display() 78 { 79 struct sigaction sa; 80 81 if (initscr() == NULL) 82 errx(1, "Terminal type unset or lacking necessary features."); 83 (void) sigaction(SIGTSTP, (struct sigaction *)0, &sa); 84 sigaddset(&sa.sa_mask, SIGALRM); 85 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 86 curses_initialized = 1; 87 clear(); 88 refresh(); 89 noecho(); 90 crmode(); 91 signal(SIGINT, sig_sent); 92 signal(SIGPIPE, sig_sent); 93 /* curses takes care of ^Z */ 94 my_win.x_nlines = LINES / 2; 95 my_win.x_ncols = COLS; 96 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 97 idlok(my_win.x_win, TRUE); 98 scrollok(my_win.x_win, TRUE); 99 wclear(my_win.x_win); 100 101 his_win.x_nlines = LINES / 2 - 1; 102 his_win.x_ncols = COLS; 103 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 104 my_win.x_nlines+1, 0); 105 idlok(my_win.x_win, TRUE); 106 scrollok(his_win.x_win, TRUE); 107 wclear(his_win.x_win); 108 109 line_win = newwin(1, COLS, my_win.x_nlines, 0); 110 #if defined(hline) || defined(whline) || defined(NCURSES_VERSION) 111 whline(line_win, 0, COLS); 112 #else 113 box(line_win, '-', '-'); 114 #endif 115 wrefresh(line_win); 116 /* let them know we are working on it */ 117 current_state = "No connection yet"; 118 } 119 120 /* 121 * Trade edit characters with the other talk. By agreement 122 * the first three characters each talk transmits after 123 * connection are the three edit characters. 124 */ 125 void 126 set_edit_chars() 127 { 128 char buf[3]; 129 int cc; 130 struct termios tio; 131 132 tcgetattr(0, &tio); 133 my_win.cerase = tio.c_cc[VERASE]; 134 my_win.kill = tio.c_cc[VKILL]; 135 my_win.werase = tio.c_cc[VWERASE]; 136 if (my_win.cerase == (char)_POSIX_VDISABLE) 137 my_win.kill = CERASE; 138 if (my_win.kill == (char)_POSIX_VDISABLE) 139 my_win.kill = CKILL; 140 if (my_win.werase == (char)_POSIX_VDISABLE) 141 my_win.werase = CWERASE; 142 buf[0] = my_win.cerase; 143 buf[1] = my_win.kill; 144 buf[2] = my_win.werase; 145 cc = write(sockt, buf, sizeof(buf)); 146 if (cc != sizeof(buf) ) 147 p_error("Lost the connection"); 148 cc = read(sockt, buf, sizeof(buf)); 149 if (cc != sizeof(buf) ) 150 p_error("Lost the connection"); 151 his_win.cerase = buf[0]; 152 his_win.kill = buf[1]; 153 his_win.werase = buf[2]; 154 } 155 156 /* ARGSUSED */ 157 void 158 sig_sent(signo) 159 int signo; 160 { 161 162 message("Connection closing. Exiting"); 163 quit(); 164 } 165 166 /* 167 * All done talking...hang up the phone and reset terminal thingy's 168 */ 169 void 170 quit() 171 { 172 173 if (curses_initialized) { 174 wmove(his_win.x_win, his_win.x_nlines-1, 0); 175 wclrtoeol(his_win.x_win); 176 wrefresh(his_win.x_win); 177 endwin(); 178 } 179 if (invitation_waiting) 180 send_delete(); 181 exit(0); 182 } 183