1 /* $OpenBSD: init_disp.c,v 1.19 2004/03/02 21:04:42 tedu Exp $ */ 2 /* $NetBSD: init_disp.c,v 1.6 1994/12/09 02:14:17 jtc Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94"; 36 #endif 37 static const char rcsid[] = "$OpenBSD: init_disp.c,v 1.19 2004/03/02 21:04:42 tedu Exp $"; 38 #endif /* not lint */ 39 40 /* 41 * Initialization code for the display package, 42 * as well as the signal handling routines. 43 */ 44 45 #include "talk.h" 46 #include <sys/ioctl.h> 47 #include <sys/ioctl_compat.h> 48 #include <err.h> 49 #include <stdlib.h> 50 #include <termios.h> 51 #include <unistd.h> 52 53 /* 54 * Set up curses, catch the appropriate signals, 55 * and build the various windows. 56 */ 57 void 58 init_display(void) 59 { 60 struct sigaction sa; 61 62 if (initscr() == NULL) 63 errx(1, "Terminal type unset or lacking necessary features."); 64 (void) sigaction(SIGTSTP, NULL, &sa); 65 sigaddset(&sa.sa_mask, SIGALRM); 66 (void) sigaction(SIGTSTP, &sa, NULL); 67 curses_initialized = 1; 68 clear(); 69 refresh(); 70 noecho(); 71 cbreak(); 72 signal(SIGINT, sig_sent); 73 signal(SIGPIPE, sig_sent); 74 signal(SIGWINCH, sig_winch); 75 /* curses takes care of ^Z */ 76 my_win.x_nlines = LINES / 2; 77 my_win.x_ncols = COLS; 78 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 79 scrollok(my_win.x_win, smooth_scroll); 80 wclear(my_win.x_win); 81 82 his_win.x_nlines = LINES / 2 - 1; 83 his_win.x_ncols = COLS; 84 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 85 my_win.x_nlines+1, 0); 86 scrollok(his_win.x_win, smooth_scroll); 87 wclear(his_win.x_win); 88 89 line_win = newwin(1, COLS, my_win.x_nlines, 0); 90 #if defined(NCURSES_VERSION) || defined(whline) 91 whline(line_win, '-', COLS); 92 #else 93 box(line_win, '-', '-'); 94 #endif 95 wrefresh(line_win); 96 /* let them know we are working on it */ 97 current_state = "No connection yet"; 98 } 99 100 /* 101 * Trade edit characters with the other talk. By agreement 102 * the first three characters each talk transmits after 103 * connection are the three edit characters. 104 */ 105 void 106 set_edit_chars(void) 107 { 108 u_char buf[3]; 109 int cc; 110 struct termios tty; 111 112 tcgetattr(STDIN_FILENO, &tty); 113 buf[0] = my_win.cerase = (tty.c_cc[VERASE] == (u_char)_POSIX_VDISABLE) 114 ? CERASE : tty.c_cc[VERASE]; 115 buf[1] = my_win.kill = (tty.c_cc[VKILL] == (u_char)_POSIX_VDISABLE) 116 ? CKILL : tty.c_cc[VKILL]; 117 buf[2] = my_win.werase = (tty.c_cc[VWERASE] == (u_char)_POSIX_VDISABLE) 118 ? CWERASE : tty.c_cc[VWERASE]; 119 cc = write(sockt, buf, sizeof(buf)); 120 if (cc != sizeof(buf) ) 121 quit("Lost the connection", 1); 122 cc = read(sockt, buf, sizeof(buf)); 123 if (cc != sizeof(buf) ) 124 quit("Lost the connection", 1); 125 his_win.cerase = buf[0]; 126 his_win.kill = buf[1]; 127 his_win.werase = buf[2]; 128 } 129 130 void 131 sig_sent(int dummy) 132 { 133 134 quit("Connection closing. Exiting", 0); 135 } 136 137 void 138 sig_winch(int dummy) 139 { 140 141 gotwinch = 1; 142 } 143 144 /* 145 * All done talking...hang up the phone and reset terminal thingy's 146 */ 147 void 148 quit(char *warning, int do_perror) 149 { 150 151 if (curses_initialized) { 152 wmove(his_win.x_win, his_win.x_nlines-1, 0); 153 wclrtoeol(his_win.x_win); 154 wrefresh(his_win.x_win); 155 endwin(); 156 } 157 if (invitation_waiting) 158 send_delete(); 159 if (warning) { 160 if (do_perror) 161 warn("%s", warning); 162 else 163 warnx("%s", warning); 164 } 165 exit(0); 166 } 167 168 /* 169 * If we get SIGWINCH, recompute both window sizes and refresh things. 170 */ 171 void 172 resize_display(void) 173 { 174 struct winsize ws; 175 176 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0 || 177 (ws.ws_row == LINES && ws.ws_col == COLS)) 178 return; 179 180 /* Update curses' internal state with new window size. */ 181 resizeterm(ws.ws_row, ws.ws_col); 182 183 /* 184 * Resize each window but wait to refresh the screen until 185 * everything has been drawn so the cursor is in the right spot. 186 */ 187 my_win.x_nlines = LINES / 2; 188 my_win.x_ncols = COLS; 189 wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols); 190 mvwin(my_win.x_win, 0, 0); 191 clearok(my_win.x_win, TRUE); 192 193 his_win.x_nlines = LINES / 2 - 1; 194 his_win.x_ncols = COLS; 195 wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols); 196 mvwin(his_win.x_win, my_win.x_nlines + 1, 0); 197 clearok(his_win.x_win, TRUE); 198 199 wresize(line_win, 1, COLS); 200 mvwin(line_win, my_win.x_nlines, 0); 201 #if defined(NCURSES_VERSION) || defined(whline) 202 whline(line_win, '-', COLS); 203 #else 204 wmove(line_win, my_win.x_nlines, 0); 205 box(line_win, '-', '-'); 206 #endif 207 208 /* Now redraw the screen. */ 209 wrefresh(his_win.x_win); 210 wrefresh(line_win); 211 wrefresh(my_win.x_win); 212 } 213