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/ioctl.h> 44 #include <sys/ioctl_compat.h> 45 #include <sys/types.h> 46 #include <sys/stat.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 check_writeable() 57 { 58 char *tty; 59 struct stat sb; 60 61 if ((tty = ttyname(STDERR_FILENO)) == NULL) 62 err(1, "ttyname"); 63 if (stat(tty, &sb) < 0) 64 err(1, "%s", tty); 65 if (!(sb.st_mode & S_IWGRP)) 66 errx(1, "The callee cannot write to this terminal, use \"mesg y\"."); 67 } 68 69 /* 70 * Set up curses, catch the appropriate signals, 71 * and build the various windows. 72 */ 73 init_display() 74 { 75 void sig_sent(); 76 struct sigvec sigv; 77 78 if (initscr() == NULL) 79 errx(1, "Terminal type unset or lacking necessary features."); 80 (void) sigvec(SIGTSTP, (struct sigvec *)0, &sigv); 81 sigv.sv_mask |= sigmask(SIGALRM); 82 (void) sigvec(SIGTSTP, &sigv, (struct sigvec *)0); 83 curses_initialized = 1; 84 clear(); 85 refresh(); 86 noecho(); 87 crmode(); 88 signal(SIGINT, sig_sent); 89 signal(SIGPIPE, sig_sent); 90 /* curses takes care of ^Z */ 91 my_win.x_nlines = LINES / 2; 92 my_win.x_ncols = COLS; 93 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 94 scrollok(my_win.x_win, TRUE); 95 wclear(my_win.x_win); 96 97 his_win.x_nlines = LINES / 2 - 1; 98 his_win.x_ncols = COLS; 99 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 100 my_win.x_nlines+1, 0); 101 scrollok(his_win.x_win, TRUE); 102 wclear(his_win.x_win); 103 104 line_win = newwin(1, COLS, my_win.x_nlines, 0); 105 box(line_win, '-', '-'); 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 set_edit_chars() 117 { 118 char buf[3]; 119 int cc; 120 struct sgttyb tty; 121 struct ltchars ltc; 122 123 ioctl(0, TIOCGETP, &tty); 124 ioctl(0, TIOCGLTC, (struct sgttyb *)<c); 125 my_win.cerase = tty.sg_erase; 126 my_win.kill = tty.sg_kill; 127 if (ltc.t_werasc == (char) -1) 128 my_win.werase = '\027'; /* control W */ 129 else 130 my_win.werase = ltc.t_werasc; 131 buf[0] = my_win.cerase; 132 buf[1] = my_win.kill; 133 buf[2] = my_win.werase; 134 cc = write(sockt, buf, sizeof(buf)); 135 if (cc != sizeof(buf) ) 136 p_error("Lost the connection"); 137 cc = read(sockt, buf, sizeof(buf)); 138 if (cc != sizeof(buf) ) 139 p_error("Lost the connection"); 140 his_win.cerase = buf[0]; 141 his_win.kill = buf[1]; 142 his_win.werase = buf[2]; 143 } 144 145 void 146 sig_sent() 147 { 148 149 message("Connection closing. Exiting"); 150 quit(); 151 } 152 153 /* 154 * All done talking...hang up the phone and reset terminal thingy's 155 */ 156 quit() 157 { 158 159 if (curses_initialized) { 160 wmove(his_win.x_win, his_win.x_nlines-1, 0); 161 wclrtoeol(his_win.x_win); 162 wrefresh(his_win.x_win); 163 endwin(); 164 } 165 if (invitation_waiting) 166 send_delete(); 167 exit(0); 168 } 169