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