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init_disp.c revision 1.10 
      1 /*	$NetBSD: init_disp.c,v 1.10 2001/12/07 12:10:09 blymn 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)init_disp.c	8.2 (Berkeley) 2/16/94";
     40 #endif
     41 __RCSID("$NetBSD: init_disp.c,v 1.10 2001/12/07 12:10:09 blymn Exp $");
     42 #endif /* not lint */
     43 
     44 /*
     45  * Initialization code for the display package,
     46  * as well as the signal handling routines.
     47  */
     48 
     49 #include "talk.h"
     50 #include <sys/ioctl.h>
     51 #include <sys/ioctl_compat.h>
     52 #include <err.h>
     53 #include <signal.h>
     54 #include <termios.h>
     55 #include <stdlib.h>
     56 #include <unistd.h>
     57 
     58 /*
     59  * Set up curses, catch the appropriate signals,
     60  * and build the various windows.
     61  */
     62 void
     63 init_display()
     64 {
     65 	struct sigaction sa;
     66 
     67 	if (initscr() == NULL)
     68 		errx(1, "Terminal type unset or lacking necessary features.");
     69 	(void)sigaction(SIGTSTP, NULL, &sa);
     70 	sigaddset(&sa.sa_mask, SIGALRM);
     71 	(void)sigaction(SIGTSTP, &sa, NULL);
     72 	curses_initialized = 1;
     73 	clear();
     74 	refresh();
     75 	noecho();
     76 	cbreak();
     77 	signal(SIGINT, sig_sent);
     78 	signal(SIGPIPE, sig_sent);
     79 	/* curses takes care of ^Z */
     80 	my_win.x_nlines = LINES / 2;
     81 	my_win.x_ncols = COLS;
     82 	my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
     83 	scrollok(my_win.x_win, FALSE);
     84 	wclear(my_win.x_win);
     85 
     86 	his_win.x_nlines = LINES / 2 - 1;
     87 	his_win.x_ncols = COLS;
     88 	his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
     89 	    my_win.x_nlines+1, 0);
     90 	scrollok(his_win.x_win, FALSE);
     91 	wclear(his_win.x_win);
     92 
     93 	line_win = newwin(1, COLS, my_win.x_nlines, 0);
     94 	box(line_win, '-', '-');
     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
    106 set_edit_chars()
    107 {
    108 	char buf[3];
    109 	int cc;
    110 	struct termios tty;
    111 
    112 	tcgetattr(0, &tty);
    113 	my_win.cerase = tty.c_cc[VERASE];
    114 	my_win.kill = tty.c_cc[VKILL];
    115 	if (tty.c_cc[VWERASE] == (unsigned char) -1)
    116 		my_win.werase = '\027';	 /* control W */
    117 	else
    118 		my_win.werase = tty.c_cc[VWERASE];
    119 	buf[0] = my_win.cerase;
    120 	buf[1] = my_win.kill;
    121 	buf[2] = my_win.werase;
    122 	cc = write(sockt, buf, sizeof(buf));
    123 	if (cc != sizeof(buf) )
    124 		p_error("Lost the connection");
    125 	cc = read(sockt, buf, sizeof(buf));
    126 	if (cc != sizeof(buf) )
    127 		p_error("Lost the connection");
    128 	his_win.cerase = buf[0];
    129 	his_win.kill = buf[1];
    130 	his_win.werase = buf[2];
    131 }
    132 
    133 void
    134 sig_sent(dummy)
    135 	int dummy;
    136 {
    137 
    138 	message("Connection closing. Exiting");
    139 	quit();
    140 }
    141 
    142 /*
    143  * All done talking...hang up the phone and reset terminal thingy's
    144  */
    145 void
    146 quit()
    147 {
    148 
    149 	if (curses_initialized) {
    150 		wmove(his_win.x_win, his_win.x_nlines-1, 0);
    151 		wclrtoeol(his_win.x_win);
    152 		wrefresh(his_win.x_win);
    153 		endwin();
    154 	}
    155 	if (invitation_waiting)
    156 		send_delete();
    157 	exit(0);
    158 }
    159