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
init_display(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
set_edit_chars(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
sig_sent(int dummy)131 sig_sent(int dummy)
132 {
133
134 quit("Connection closing. Exiting", 0);
135 }
136
137 void
sig_winch(int dummy)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
quit(char * warning,int do_perror)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
resize_display(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