1 /* $OpenBSD: init_disp.c,v 1.23 2019/06/28 13:35:04 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 <sys/ioctl.h> 39 40 #include <err.h> 41 #include <stdlib.h> 42 #include <termios.h> 43 #include <unistd.h> 44 45 #include "talk.h" 46 47 /* 48 * Set up curses, catch the appropriate signals, 49 * and build the various windows. 50 */ 51 void 52 init_display(void) 53 { 54 struct sigaction sa; 55 56 if (initscr() == NULL) 57 errx(1, "Terminal type unset or lacking necessary features."); 58 (void) sigaction(SIGTSTP, NULL, &sa); 59 sigaddset(&sa.sa_mask, SIGALRM); 60 (void) sigaction(SIGTSTP, &sa, NULL); 61 curses_initialized = 1; 62 clear(); 63 refresh(); 64 noecho(); 65 cbreak(); 66 signal(SIGINT, sig_sent); 67 signal(SIGPIPE, sig_sent); 68 signal(SIGWINCH, sig_winch); 69 /* curses takes care of ^Z */ 70 my_win.x_nlines = LINES / 2; 71 my_win.x_ncols = COLS; 72 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 73 scrollok(my_win.x_win, smooth_scroll); 74 wclear(my_win.x_win); 75 76 his_win.x_nlines = LINES / 2 - 1; 77 his_win.x_ncols = COLS; 78 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 79 my_win.x_nlines+1, 0); 80 scrollok(his_win.x_win, smooth_scroll); 81 wclear(his_win.x_win); 82 83 line_win = newwin(1, COLS, my_win.x_nlines, 0); 84 #if defined(NCURSES_VERSION) || defined(whline) 85 whline(line_win, '-', COLS); 86 #else 87 box(line_win, '-', '-'); 88 #endif 89 wrefresh(line_win); 90 /* let them know we are working on it */ 91 current_state = "No connection yet"; 92 } 93 94 /* 95 * Trade edit characters with the other talk. By agreement 96 * the first three characters each talk transmits after 97 * connection are the three edit characters. 98 */ 99 void 100 set_edit_chars(void) 101 { 102 u_char buf[3]; 103 int cc; 104 struct termios tty; 105 106 tcgetattr(STDIN_FILENO, &tty); 107 buf[0] = my_win.cerase = (tty.c_cc[VERASE] == (u_char)_POSIX_VDISABLE) 108 ? CERASE : tty.c_cc[VERASE]; 109 buf[1] = my_win.kill = (tty.c_cc[VKILL] == (u_char)_POSIX_VDISABLE) 110 ? CKILL : tty.c_cc[VKILL]; 111 buf[2] = my_win.werase = (tty.c_cc[VWERASE] == (u_char)_POSIX_VDISABLE) 112 ? CWERASE : tty.c_cc[VWERASE]; 113 cc = write(sockt, buf, sizeof(buf)); 114 if (cc != sizeof(buf) ) 115 quit("Lost the connection", 1); 116 cc = read(sockt, buf, sizeof(buf)); 117 if (cc != sizeof(buf) ) 118 quit("Lost the connection", 1); 119 his_win.cerase = buf[0]; 120 his_win.kill = buf[1]; 121 his_win.werase = buf[2]; 122 } 123 124 void 125 sig_sent(int dummy) 126 { 127 128 quit("Connection closing. Exiting", 0); 129 } 130 131 void 132 sig_winch(int dummy) 133 { 134 135 gotwinch = 1; 136 } 137 138 /* 139 * All done talking...hang up the phone and reset terminal thingy's 140 */ 141 void 142 quit(char *warning, int do_perror) 143 { 144 145 if (curses_initialized) { 146 wmove(his_win.x_win, his_win.x_nlines-1, 0); 147 wclrtoeol(his_win.x_win); 148 wrefresh(his_win.x_win); 149 endwin(); 150 } 151 if (invitation_waiting) 152 send_delete(); 153 if (warning) { 154 if (do_perror) 155 warn("%s", warning); 156 else 157 warnx("%s", warning); 158 } 159 exit(0); 160 } 161 162 /* 163 * If we get SIGWINCH, recompute both window sizes and refresh things. 164 */ 165 void 166 resize_display(void) 167 { 168 struct winsize ws; 169 170 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == -1 || 171 (ws.ws_row == LINES && ws.ws_col == COLS)) 172 return; 173 174 /* Update curses' internal state with new window size. */ 175 resizeterm(ws.ws_row, ws.ws_col); 176 177 /* 178 * Resize each window but wait to refresh the screen until 179 * everything has been drawn so the cursor is in the right spot. 180 */ 181 my_win.x_nlines = LINES / 2; 182 my_win.x_ncols = COLS; 183 wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols); 184 mvwin(my_win.x_win, 0, 0); 185 clearok(my_win.x_win, TRUE); 186 187 his_win.x_nlines = LINES / 2 - 1; 188 his_win.x_ncols = COLS; 189 wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols); 190 mvwin(his_win.x_win, my_win.x_nlines + 1, 0); 191 clearok(his_win.x_win, TRUE); 192 193 wresize(line_win, 1, COLS); 194 mvwin(line_win, my_win.x_nlines, 0); 195 #if defined(NCURSES_VERSION) || defined(whline) 196 whline(line_win, '-', COLS); 197 #else 198 wmove(line_win, my_win.x_nlines, 0); 199 box(line_win, '-', '-'); 200 #endif 201 202 /* Now redraw the screen. */ 203 wrefresh(his_win.x_win); 204 wrefresh(line_win); 205 wrefresh(my_win.x_win); 206 } 207