talk(1): Raise WARNS to 6 and fix warnings.
[dragonfly.git] / usr.bin / talk / init_disp.c
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1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)init_disp.c 8.2 (Berkeley) 2/16/94
34 * $FreeBSD: src/usr.bin/talk/init_disp.c,v 1.11.2.1 2001/07/30 10:31:29 dd Exp $
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35 */
36
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37/*
38 * Initialization code for the display package,
39 * as well as the signal handling routines.
40 */
41
42#include <err.h>
43#include <signal.h>
44#include <stdlib.h>
45#include <sys/stat.h>
46#include <unistd.h>
47#include <termios.h>
48#include "talk.h"
49
50/*
51 * Make sure the callee can write to the screen
52 */
53void
1d1731fa 54check_writeable(void)
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55{
56 char *tty;
57 struct stat sb;
58
59 if ((tty = ttyname(STDERR_FILENO)) == NULL)
60 err(1, "ttyname");
61 if (stat(tty, &sb) < 0)
62 err(1, "%s", tty);
63 if (!(sb.st_mode & S_IWGRP))
64 errx(1, "The callee cannot write to this terminal, use \"mesg y\".");
65}
66
67/*
68 * Set up curses, catch the appropriate signals,
69 * and build the various windows.
70 */
71void
1d1731fa 72init_display(void)
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73{
74 struct sigaction sa;
75
76 if (initscr() == NULL)
77 errx(1, "Terminal type unset or lacking necessary features.");
60233e58 78 (void) sigaction(SIGTSTP, NULL, &sa);
984263bc 79 sigaddset(&sa.sa_mask, SIGALRM);
60233e58 80 (void) sigaction(SIGTSTP, &sa, NULL);
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81 curses_initialized = 1;
82 clear();
83 refresh();
84 noecho();
85 crmode();
86 signal(SIGINT, sig_sent);
87 signal(SIGPIPE, sig_sent);
88 /* curses takes care of ^Z */
89 my_win.x_nlines = LINES / 2;
90 my_win.x_ncols = COLS;
91 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
92 idlok(my_win.x_win, TRUE);
93 scrollok(my_win.x_win, TRUE);
94 wclear(my_win.x_win);
95
96 his_win.x_nlines = LINES / 2 - 1;
97 his_win.x_ncols = COLS;
98 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
99 my_win.x_nlines+1, 0);
100 idlok(my_win.x_win, TRUE);
101 scrollok(his_win.x_win, TRUE);
102 wclear(his_win.x_win);
103
104 line_win = newwin(1, COLS, my_win.x_nlines, 0);
105#if defined(hline) || defined(whline) || defined(NCURSES_VERSION)
106 whline(line_win, 0, COLS);
107#else
108 box(line_win, '-', '-');
109#endif
110 wrefresh(line_win);
111 /* let them know we are working on it */
112 current_state = "No connection yet";
113}
114
115/*
116 * Trade edit characters with the other talk. By agreement
117 * the first three characters each talk transmits after
118 * connection are the three edit characters.
119 */
120void
1d1731fa 121set_edit_chars(void)
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122{
123 char buf[3];
124 int cc;
125 struct termios tio;
126
127 tcgetattr(0, &tio);
128 my_win.cerase = tio.c_cc[VERASE];
129 my_win.kill = tio.c_cc[VKILL];
130 my_win.werase = tio.c_cc[VWERASE];
131 if (my_win.cerase == (char)_POSIX_VDISABLE)
132 my_win.kill = CERASE;
133 if (my_win.kill == (char)_POSIX_VDISABLE)
134 my_win.kill = CKILL;
135 if (my_win.werase == (char)_POSIX_VDISABLE)
136 my_win.werase = CWERASE;
137 buf[0] = my_win.cerase;
138 buf[1] = my_win.kill;
139 buf[2] = my_win.werase;
140 cc = write(sockt, buf, sizeof(buf));
141 if (cc != sizeof(buf) )
142 p_error("Lost the connection");
143 cc = read(sockt, buf, sizeof(buf));
144 if (cc != sizeof(buf) )
145 p_error("Lost the connection");
146 his_win.cerase = buf[0];
147 his_win.kill = buf[1];
148 his_win.werase = buf[2];
149}
150
151/* ARGSUSED */
152void
e2daa382 153sig_sent(int signo __unused)
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154{
155
156 message("Connection closing. Exiting");
157 quit();
158}
159
160/*
161 * All done talking...hang up the phone and reset terminal thingy's
162 */
163void
1d1731fa 164quit(void)
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165{
166
167 if (curses_initialized) {
168 wmove(his_win.x_win, his_win.x_nlines-1, 0);
169 wclrtoeol(his_win.x_win);
170 wrefresh(his_win.x_win);
171 endwin();
172 }
173 if (invitation_waiting)
174 send_delete();
175 exit(0);
176}