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      1 /*	$NetBSD: init_disp.c,v 1.12 2011/09/06 18:32:03 joerg Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 #if 0
     35 static char sccsid[] = "@(#)init_disp.c	8.2 (Berkeley) 2/16/94";
     36 #endif
     37 __RCSID("$NetBSD: init_disp.c,v 1.12 2011/09/06 18:32:03 joerg 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 <signal.h>
     50 #include <termios.h>
     51 #include <stdlib.h>
     52 #include <unistd.h>
     53 
     54 /*
     55  * Set up curses, catch the appropriate signals,
     56  * and build the various windows.
     57  */
     58 void
     59 init_display(void)
     60 {
     61 	struct sigaction sa;
     62 
     63 	if (initscr() == NULL)
     64 		errx(1, "Terminal type unset or lacking necessary features.");
     65 	(void)sigaction(SIGTSTP, NULL, &sa);
     66 	sigaddset(&sa.sa_mask, SIGALRM);
     67 	(void)sigaction(SIGTSTP, &sa, NULL);
     68 	curses_initialized = 1;
     69 	clear();
     70 	refresh();
     71 	noecho();
     72 	cbreak();
     73 	signal(SIGINT, sig_sent);
     74 	signal(SIGPIPE, sig_sent);
     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, FALSE);
     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, FALSE);
     87 	wclear(his_win.x_win);
     88 
     89 	line_win = newwin(1, COLS, my_win.x_nlines, 0);
     90 	box(line_win, '-', '-');
     91 	wrefresh(line_win);
     92 	/* let them know we are working on it */
     93 	current_state = "No connection yet";
     94 }
     95 
     96 /*
     97  * Trade edit characters with the other talk. By agreement
     98  * the first three characters each talk transmits after
     99  * connection are the three edit characters.
    100  */
    101 void
    102 set_edit_chars(void)
    103 {
    104 	char buf[3];
    105 	int cc;
    106 	struct termios tty;
    107 
    108 	tcgetattr(0, &tty);
    109 	my_win.cerase = tty.c_cc[VERASE];
    110 	my_win.kill = tty.c_cc[VKILL];
    111 	if (tty.c_cc[VWERASE] == (unsigned char) -1)
    112 		my_win.werase = '\027';	 /* control W */
    113 	else
    114 		my_win.werase = tty.c_cc[VWERASE];
    115 	buf[0] = my_win.cerase;
    116 	buf[1] = my_win.kill;
    117 	buf[2] = my_win.werase;
    118 	cc = write(sockt, buf, sizeof(buf));
    119 	if (cc != sizeof(buf) )
    120 		p_error("Lost the connection");
    121 	cc = read(sockt, buf, sizeof(buf));
    122 	if (cc != sizeof(buf) )
    123 		p_error("Lost the connection");
    124 	his_win.cerase = buf[0];
    125 	his_win.kill = buf[1];
    126 	his_win.werase = buf[2];
    127 }
    128 
    129 void
    130 sig_sent(int dummy)
    131 {
    132 
    133 	message("Connection closing. Exiting");
    134 	quit();
    135 }
    136 
    137 /*
    138  * All done talking...hang up the phone and reset terminal thingy's
    139  */
    140 void
    141 quit(void)
    142 {
    143 
    144 	if (curses_initialized) {
    145 		wmove(his_win.x_win, his_win.x_nlines-1, 0);
    146 		wclrtoeol(his_win.x_win);
    147 		wrefresh(his_win.x_win);
    148 		endwin();
    149 	}
    150 	if (invitation_waiting)
    151 		send_delete();
    152 	exit(0);
    153 }
    154