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 * 4. 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 30 #include <sys/cdefs.h> 31 32 __FBSDID("$FreeBSD$"); 33 34 #ifndef lint 35 static const char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94"; 36 #endif 37 38 /* 39 * Initialization code for the display package, 40 * as well as the signal handling routines. 41 */ 42 43 #include <sys/stat.h> 44 45 #include <err.h> 46 #include <signal.h> 47 #include <stdlib.h> 48 #include <unistd.h> 49 #include <termios.h> 50 51 #include "talk.h" 52 53 /* 54 * Make sure the callee can write to the screen 55 */ 56 void 57 check_writeable(void) 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(void) 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 signal(SIGWINCH, sig_winch); 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(void) 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(int signo __unused) 158 { 159 160 message("Connection closing. Exiting"); 161 quit(); 162 } 163 164 void 165 sig_winch(int dummy __unused) 166 { 167 168 gotwinch = 1; 169 } 170 171 /* 172 * All done talking...hang up the phone and reset terminal thingy's 173 */ 174 void 175 quit(void) 176 { 177 178 if (curses_initialized) { 179 wmove(his_win.x_win, his_win.x_nlines-1, 0); 180 wclrtoeol(his_win.x_win); 181 wrefresh(his_win.x_win); 182 endwin(); 183 } 184 if (invitation_waiting) 185 send_delete(); 186 exit(0); 187 } 188 189 /* 190 * If we get SIGWINCH, recompute both window sizes and refresh things. 191 */ 192 void 193 resize_display(void) 194 { 195 struct winsize ws; 196 197 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0 || 198 (ws.ws_row == LINES && ws.ws_col == COLS)) 199 return; 200 201 /* Update curses' internal state with new window size. */ 202 resizeterm(ws.ws_row, ws.ws_col); 203 204 /* 205 * Resize each window but wait to refresh the screen until 206 * everything has been drawn so the cursor is in the right spot. 207 */ 208 my_win.x_nlines = LINES / 2; 209 my_win.x_ncols = COLS; 210 wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols); 211 mvwin(my_win.x_win, 0, 0); 212 clearok(my_win.x_win, TRUE); 213 214 his_win.x_nlines = LINES / 2 - 1; 215 his_win.x_ncols = COLS; 216 wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols); 217 mvwin(his_win.x_win, my_win.x_nlines + 1, 0); 218 clearok(his_win.x_win, TRUE); 219 220 wresize(line_win, 1, COLS); 221 mvwin(line_win, my_win.x_nlines, 0); 222 #if defined(NCURSES_VERSION) || defined(whline) 223 whline(line_win, '-', COLS); 224 #else 225 wmove(line_win, my_win.x_nlines, 0); 226 box(line_win, '-', '-'); 227 #endif 228 229 /* Now redraw the screen. */ 230 wrefresh(his_win.x_win); 231 wrefresh(line_win); 232 wrefresh(my_win.x_win); 233 } 234