1 /* $OpenBSD: init_disp.c,v 1.21 2013/12/11 14:28:20 naddy 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 <err.h> 41 #include <stdlib.h> 42 #include <termios.h> 43 #include <unistd.h> 44 45 /* 46 * Set up curses, catch the appropriate signals, 47 * and build the various windows. 48 */ 49 void 50 init_display(void) 51 { 52 struct sigaction sa; 53 54 if (initscr() == NULL) 55 errx(1, "Terminal type unset or lacking necessary features."); 56 (void) sigaction(SIGTSTP, NULL, &sa); 57 sigaddset(&sa.sa_mask, SIGALRM); 58 (void) sigaction(SIGTSTP, &sa, NULL); 59 curses_initialized = 1; 60 clear(); 61 refresh(); 62 noecho(); 63 cbreak(); 64 signal(SIGINT, sig_sent); 65 signal(SIGPIPE, sig_sent); 66 signal(SIGWINCH, sig_winch); 67 /* curses takes care of ^Z */ 68 my_win.x_nlines = LINES / 2; 69 my_win.x_ncols = COLS; 70 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0); 71 scrollok(my_win.x_win, smooth_scroll); 72 wclear(my_win.x_win); 73 74 his_win.x_nlines = LINES / 2 - 1; 75 his_win.x_ncols = COLS; 76 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols, 77 my_win.x_nlines+1, 0); 78 scrollok(his_win.x_win, smooth_scroll); 79 wclear(his_win.x_win); 80 81 line_win = newwin(1, COLS, my_win.x_nlines, 0); 82 #if defined(NCURSES_VERSION) || defined(whline) 83 whline(line_win, '-', COLS); 84 #else 85 box(line_win, '-', '-'); 86 #endif 87 wrefresh(line_win); 88 /* let them know we are working on it */ 89 current_state = "No connection yet"; 90 } 91 92 /* 93 * Trade edit characters with the other talk. By agreement 94 * the first three characters each talk transmits after 95 * connection are the three edit characters. 96 */ 97 void 98 set_edit_chars(void) 99 { 100 u_char buf[3]; 101 int cc; 102 struct termios tty; 103 104 tcgetattr(STDIN_FILENO, &tty); 105 buf[0] = my_win.cerase = (tty.c_cc[VERASE] == (u_char)_POSIX_VDISABLE) 106 ? CERASE : tty.c_cc[VERASE]; 107 buf[1] = my_win.kill = (tty.c_cc[VKILL] == (u_char)_POSIX_VDISABLE) 108 ? CKILL : tty.c_cc[VKILL]; 109 buf[2] = my_win.werase = (tty.c_cc[VWERASE] == (u_char)_POSIX_VDISABLE) 110 ? CWERASE : tty.c_cc[VWERASE]; 111 cc = write(sockt, buf, sizeof(buf)); 112 if (cc != sizeof(buf) ) 113 quit("Lost the connection", 1); 114 cc = read(sockt, buf, sizeof(buf)); 115 if (cc != sizeof(buf) ) 116 quit("Lost the connection", 1); 117 his_win.cerase = buf[0]; 118 his_win.kill = buf[1]; 119 his_win.werase = buf[2]; 120 } 121 122 void 123 sig_sent(int dummy) 124 { 125 126 quit("Connection closing. Exiting", 0); 127 } 128 129 void 130 sig_winch(int dummy) 131 { 132 133 gotwinch = 1; 134 } 135 136 /* 137 * All done talking...hang up the phone and reset terminal thingy's 138 */ 139 void 140 quit(char *warning, int do_perror) 141 { 142 143 if (curses_initialized) { 144 wmove(his_win.x_win, his_win.x_nlines-1, 0); 145 wclrtoeol(his_win.x_win); 146 wrefresh(his_win.x_win); 147 endwin(); 148 } 149 if (invitation_waiting) 150 send_delete(); 151 if (warning) { 152 if (do_perror) 153 warn("%s", warning); 154 else 155 warnx("%s", warning); 156 } 157 exit(0); 158 } 159 160 /* 161 * If we get SIGWINCH, recompute both window sizes and refresh things. 162 */ 163 void 164 resize_display(void) 165 { 166 struct winsize ws; 167 168 if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0 || 169 (ws.ws_row == LINES && ws.ws_col == COLS)) 170 return; 171 172 /* Update curses' internal state with new window size. */ 173 resizeterm(ws.ws_row, ws.ws_col); 174 175 /* 176 * Resize each window but wait to refresh the screen until 177 * everything has been drawn so the cursor is in the right spot. 178 */ 179 my_win.x_nlines = LINES / 2; 180 my_win.x_ncols = COLS; 181 wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols); 182 mvwin(my_win.x_win, 0, 0); 183 clearok(my_win.x_win, TRUE); 184 185 his_win.x_nlines = LINES / 2 - 1; 186 his_win.x_ncols = COLS; 187 wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols); 188 mvwin(his_win.x_win, my_win.x_nlines + 1, 0); 189 clearok(his_win.x_win, TRUE); 190 191 wresize(line_win, 1, COLS); 192 mvwin(line_win, my_win.x_nlines, 0); 193 #if defined(NCURSES_VERSION) || defined(whline) 194 whline(line_win, '-', COLS); 195 #else 196 wmove(line_win, my_win.x_nlines, 0); 197 box(line_win, '-', '-'); 198 #endif 199 200 /* Now redraw the screen. */ 201 wrefresh(his_win.x_win); 202 wrefresh(line_win); 203 wrefresh(my_win.x_win); 204 } 205