1 /* $OpenBSD: init_disp.c,v 1.20 2009/10/27 23:59:44 deraadt 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 /* 34 * Initialization code for the display package, 35 * as well as the signal handling routines. 36 */ 37 38 #include "talk.h" 39 #include <sys/ioctl.h> 40 #include <sys/ioctl_compat.h> 41 #include <err.h> 42 #include <stdlib.h> 43 #include <termios.h> 44 #include <unistd.h> 45 46 /* 47 * Set up curses, catch the appropriate signals, 48 * and build the various windows. 49 */ 50 void 51 init_display(void) 52 { 53 struct sigaction sa; 54 55 if (initscr() == NULL) 56 errx(1, "Terminal type unset or lacking necessary features."); 57 (void) sigaction(SIGTSTP, NULL, &sa); 58 sigaddset(&sa.sa_mask, SIGALRM); 59 (void) sigaction(SIGTSTP, &sa, NULL); 60 curses_initialized = 1; 61 clear(); 62 refresh(); 63 noecho(); 64 cbreak(); 65 signal(SIGINT, sig_sent); 66 signal(SIGPIPE, sig_sent); 67 signal(SIGWINCH, sig_winch); 68 /* curses takes care of ^Z */ 69 my_win.x_nlines = LINES / 2; 70 my_win.x_ncols = COLS; 71 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 72 scrollok(my_win.x_win, smooth_scroll); 73 wclear(my_win.x_win); 74 75 his_win.x_nlines = LINES / 2 - 1; 76 his_win.x_ncols = COLS; 77 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 78 my_win.x_nlines+1, 0); 79 scrollok(his_win.x_win, smooth_scroll); 80 wclear(his_win.x_win); 81 82 line_win = newwin(1, COLS, my_win.x_nlines, 0); 83 #if defined(NCURSES_VERSION) || defined(whline) 84 whline(line_win, '-', COLS); 85 #else 86 box(line_win, '-', '-'); 87 #endif 88 wrefresh(line_win); 89 /* let them know we are working on it */ 90 current_state = "No connection yet"; 91 } 92 93 /* 94 * Trade edit characters with the other talk. By agreement 95 * the first three characters each talk transmits after 96 * connection are the three edit characters. 97 */ 98 void 99 set_edit_chars(void) 100 { 101 u_char buf[3]; 102 int cc; 103 struct termios tty; 104 105 tcgetattr(STDIN_FILENO, &tty); 106 buf[0] = my_win.cerase = (tty.c_cc[VERASE] == (u_char)_POSIX_VDISABLE) 107 ? CERASE : tty.c_cc[VERASE]; 108 buf[1] = my_win.kill = (tty.c_cc[VKILL] == (u_char)_POSIX_VDISABLE) 109 ? CKILL : tty.c_cc[VKILL]; 110 buf[2] = my_win.werase = (tty.c_cc[VWERASE] == (u_char)_POSIX_VDISABLE) 111 ? CWERASE : tty.c_cc[VWERASE]; 112 cc = write(sockt, buf, sizeof(buf)); 113 if (cc != sizeof(buf) ) 114 quit("Lost the connection", 1); 115 cc = read(sockt, buf, sizeof(buf)); 116 if (cc != sizeof(buf) ) 117 quit("Lost the connection", 1); 118 his_win.cerase = buf[0]; 119 his_win.kill = buf[1]; 120 his_win.werase = buf[2]; 121 } 122 123 void 124 sig_sent(int dummy) 125 { 126 127 quit("Connection closing. Exiting", 0); 128 } 129 130 void 131 sig_winch(int dummy) 132 { 133 134 gotwinch = 1; 135 } 136 137 /* 138 * All done talking...hang up the phone and reset terminal thingy's 139 */ 140 void 141 quit(char *warning, int do_perror) 142 { 143 144 if (curses_initialized) { 145 wmove(his_win.x_win, his_win.x_nlines-1, 0); 146 wclrtoeol(his_win.x_win); 147 wrefresh(his_win.x_win); 148 endwin(); 149 } 150 if (invitation_waiting) 151 send_delete(); 152 if (warning) { 153 if (do_perror) 154 warn("%s", warning); 155 else 156 warnx("%s", warning); 157 } 158 exit(0); 159 } 160 161 /* 162 * If we get SIGWINCH, recompute both window sizes and refresh things. 163 */ 164 void 165 resize_display(void) 166 { 167 struct winsize ws; 168 169 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0 || 170 (ws.ws_row == LINES && ws.ws_col == COLS)) 171 return; 172 173 /* Update curses' internal state with new window size. */ 174 resizeterm(ws.ws_row, ws.ws_col); 175 176 /* 177 * Resize each window but wait to refresh the screen until 178 * everything has been drawn so the cursor is in the right spot. 179 */ 180 my_win.x_nlines = LINES / 2; 181 my_win.x_ncols = COLS; 182 wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols); 183 mvwin(my_win.x_win, 0, 0); 184 clearok(my_win.x_win, TRUE); 185 186 his_win.x_nlines = LINES / 2 - 1; 187 his_win.x_ncols = COLS; 188 wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols); 189 mvwin(his_win.x_win, my_win.x_nlines + 1, 0); 190 clearok(his_win.x_win, TRUE); 191 192 wresize(line_win, 1, COLS); 193 mvwin(line_win, my_win.x_nlines, 0); 194 #if defined(NCURSES_VERSION) || defined(whline) 195 whline(line_win, '-', COLS); 196 #else 197 wmove(line_win, my_win.x_nlines, 0); 198 box(line_win, '-', '-'); 199 #endif 200 201 /* Now redraw the screen. */ 202 wrefresh(his_win.x_win); 203 wrefresh(line_win); 204 wrefresh(my_win.x_win); 205 } 206