rtld - do not allow both dynamic DTV index and static TLS offset
[dragonfly.git] / usr.bin / talk / init_disp.c
blob2c1121bfa12e727ab6b520efae8ecb5c16c41e9c
1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
29 * @(#)init_disp.c 8.2 (Berkeley) 2/16/94
30 * $FreeBSD: src/usr.bin/talk/init_disp.c,v 1.11.2.1 2001/07/30 10:31:29 dd Exp $
34 * Initialization code for the display package,
35 * as well as the signal handling routines.
38 #include <err.h>
39 #include <signal.h>
40 #include <stdlib.h>
41 #include <sys/stat.h>
42 #include <unistd.h>
43 #include <termios.h>
44 #include "talk.h"
47 * Make sure the callee can write to the screen
49 void
50 check_writeable(void)
52 char *tty;
53 struct stat sb;
55 if ((tty = ttyname(STDERR_FILENO)) == NULL)
56 err(1, "ttyname");
57 if (stat(tty, &sb) < 0)
58 err(1, "%s", tty);
59 if (!(sb.st_mode & S_IWGRP))
60 errx(1, "The callee cannot write to this terminal, use \"mesg y\".");
64 * Set up curses, catch the appropriate signals,
65 * and build the various windows.
67 void
68 init_display(void)
70 struct sigaction sa;
72 if (initscr() == NULL)
73 errx(1, "Terminal type unset or lacking necessary features.");
74 (void) sigaction(SIGTSTP, NULL, &sa);
75 sigaddset(&sa.sa_mask, SIGALRM);
76 (void) sigaction(SIGTSTP, &sa, NULL);
77 curses_initialized = 1;
78 clear();
79 refresh();
80 noecho();
81 crmode();
82 signal(SIGINT, sig_sent);
83 signal(SIGPIPE, sig_sent);
84 /* curses takes care of ^Z */
85 my_win.x_nlines = LINES / 2;
86 my_win.x_ncols = COLS;
87 my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
88 idlok(my_win.x_win, TRUE);
89 scrollok(my_win.x_win, TRUE);
90 wclear(my_win.x_win);
92 his_win.x_nlines = LINES / 2 - 1;
93 his_win.x_ncols = COLS;
94 his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
95 my_win.x_nlines+1, 0);
96 idlok(my_win.x_win, TRUE);
97 scrollok(his_win.x_win, TRUE);
98 wclear(his_win.x_win);
100 line_win = newwin(1, COLS, my_win.x_nlines, 0);
101 #if defined(hline) || defined(whline) || defined(NCURSES_VERSION)
102 whline(line_win, 0, COLS);
103 #else
104 box(line_win, '-', '-');
105 #endif
106 wrefresh(line_win);
107 /* let them know we are working on it */
108 current_state = "No connection yet";
112 * Trade edit characters with the other talk. By agreement
113 * the first three characters each talk transmits after
114 * connection are the three edit characters.
116 void
117 set_edit_chars(void)
119 char buf[3];
120 int cc;
121 struct termios tio;
123 tcgetattr(0, &tio);
124 my_win.cerase = tio.c_cc[VERASE];
125 my_win.kill = tio.c_cc[VKILL];
126 my_win.werase = tio.c_cc[VWERASE];
127 if (my_win.cerase == (char)_POSIX_VDISABLE)
128 my_win.kill = CERASE;
129 if (my_win.kill == (char)_POSIX_VDISABLE)
130 my_win.kill = CKILL;
131 if (my_win.werase == (char)_POSIX_VDISABLE)
132 my_win.werase = CWERASE;
133 buf[0] = my_win.cerase;
134 buf[1] = my_win.kill;
135 buf[2] = my_win.werase;
136 cc = write(sockt, buf, sizeof(buf));
137 if (cc != sizeof(buf) )
138 p_error("Lost the connection");
139 cc = read(sockt, buf, sizeof(buf));
140 if (cc != sizeof(buf) )
141 p_error("Lost the connection");
142 his_win.cerase = buf[0];
143 his_win.kill = buf[1];
144 his_win.werase = buf[2];
147 /* ARGSUSED */
148 void
149 sig_sent(int signo __unused)
152 message("Connection closing. Exiting");
153 quit();
157 * All done talking...hang up the phone and reset terminal thingy's
159 void
160 quit(void)
163 if (curses_initialized) {
164 wmove(his_win.x_win, his_win.x_nlines-1, 0);
165 wclrtoeol(his_win.x_win);
166 wrefresh(his_win.x_win);
167 endwin();
169 if (invitation_waiting)
170 send_delete();
171 exit(0);