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init_disp.c revision 1.1 
      1 /*
      2  * Copyright (c) 1983 Regents of the University of California.
      3  * 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.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)init_disp.c	5.4 (Berkeley) 6/1/90";
     36 #endif /* not lint */
     37 
     38 /*
     39  * Initialization code for the display package,
     40  * as well as the signal handling routines.
     41  */
     42 
     43 #include "talk.h"
     44 #include <signal.h>
     45 
     46 /*
     47  * Set up curses, catch the appropriate signals,
     48  * and build the various windows.
     49  */
     50 init_display()
     51 {
     52 	void sig_sent();
     53 	struct sigvec sigv;
     54 
     55 	initscr();
     56 	(void) sigvec(SIGTSTP, (struct sigvec *)0, &sigv);
     57 	sigv.sv_mask |= sigmask(SIGALRM);
     58 	(void) sigvec(SIGTSTP, &sigv, (struct sigvec *)0);
     59 	curses_initialized = 1;
     60 	clear();
     61 	refresh();
     62 	noecho();
     63 	crmode();
     64 	signal(SIGINT, sig_sent);
     65 	signal(SIGPIPE, sig_sent);
     66 	/* curses takes care of ^Z */
     67 	my_win.x_nlines = LINES / 2;
     68 	my_win.x_ncols = COLS;
     69 	my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
     70 	scrollok(my_win.x_win, FALSE);
     71 	wclear(my_win.x_win);
     72 
     73 	his_win.x_nlines = LINES / 2 - 1;
     74 	his_win.x_ncols = COLS;
     75 	his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
     76 	    my_win.x_nlines+1, 0);
     77 	scrollok(his_win.x_win, FALSE);
     78 	wclear(his_win.x_win);
     79 
     80 	line_win = newwin(1, COLS, my_win.x_nlines, 0);
     81 	box(line_win, '-', '-');
     82 	wrefresh(line_win);
     83 	/* let them know we are working on it */
     84 	current_state = "No connection yet";
     85 }
     86 
     87 /*
     88  * Trade edit characters with the other talk. By agreement
     89  * the first three characters each talk transmits after
     90  * connection are the three edit characters.
     91  */
     92 set_edit_chars()
     93 {
     94 	char buf[3];
     95 	int cc;
     96 	struct sgttyb tty;
     97 	struct ltchars ltc;
     98 
     99 	ioctl(0, TIOCGETP, &tty);
    100 	ioctl(0, TIOCGLTC, (struct sgttyb *)&ltc);
    101 	my_win.cerase = tty.sg_erase;
    102 	my_win.kill = tty.sg_kill;
    103 	if (ltc.t_werasc == (char) -1)
    104 		my_win.werase = '\027';	 /* control W */
    105 	else
    106 		my_win.werase = ltc.t_werasc;
    107 	buf[0] = my_win.cerase;
    108 	buf[1] = my_win.kill;
    109 	buf[2] = my_win.werase;
    110 	cc = write(sockt, buf, sizeof(buf));
    111 	if (cc != sizeof(buf) )
    112 		p_error("Lost the connection");
    113 	cc = read(sockt, buf, sizeof(buf));
    114 	if (cc != sizeof(buf) )
    115 		p_error("Lost the connection");
    116 	his_win.cerase = buf[0];
    117 	his_win.kill = buf[1];
    118 	his_win.werase = buf[2];
    119 }
    120 
    121 void
    122 sig_sent()
    123 {
    124 
    125 	message("Connection closing. Exiting");
    126 	quit();
    127 }
    128 
    129 /*
    130  * All done talking...hang up the phone and reset terminal thingy's
    131  */
    132 quit()
    133 {
    134 
    135 	if (curses_initialized) {
    136 		wmove(his_win.x_win, his_win.x_nlines-1, 0);
    137 		wclrtoeol(his_win.x_win);
    138 		wrefresh(his_win.x_win);
    139 		endwin();
    140 	}
    141 	if (invitation_waiting)
    142 		send_delete();
    143 	exit(0);
    144 }
    145