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