Home | History | Annotate | Line # | Download | only in talk
init_disp.c revision 1.5 
      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[] = "from: @(#)init_disp.c	5.4 (Berkeley) 6/1/90";*/
     36 static char rcsid[] = "$Id: init_disp.c,v 1.5 1994/03/28 11:17:16 cgd Exp $";
     37 #endif /* not lint */
     38 
     39 /*
     40  * Initialization code for the display package,
     41  * as well as the signal handling routines.
     42  */
     43 
     44 #include "talk.h"
     45 #include <signal.h>
     46 #include <termios.h>
     47 #include <stdio.h>
     48 
     49 /*
     50  * Set up curses, catch the appropriate signals,
     51  * and build the various windows.
     52  */
     53 init_display()
     54 {
     55 	void sig_sent();
     56 	struct sigvec sigv;
     57 
     58 	if (initscr() == NULL) {
     59 		printf("initscr failed: TERM is unset or unknown terminal type.\n");
     60 		exit(-1);
     61 	}
     62 	(void) sigvec(SIGTSTP, (struct sigvec *)0, &sigv);
     63 	sigv.sv_mask |= sigmask(SIGALRM);
     64 	(void) sigvec(SIGTSTP, &sigv, (struct sigvec *)0);
     65 	curses_initialized = 1;
     66 	clear();
     67 	refresh();
     68 	noecho();
     69 	crmode();
     70 	signal(SIGINT, sig_sent);
     71 	signal(SIGPIPE, sig_sent);
     72 	/* curses takes care of ^Z */
     73 	my_win.x_nlines = LINES / 2;
     74 	my_win.x_ncols = COLS;
     75 	my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
     76 	scrollok(my_win.x_win, FALSE);
     77 	wclear(my_win.x_win);
     78 
     79 	his_win.x_nlines = LINES / 2 - 1;
     80 	his_win.x_ncols = COLS;
     81 	his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
     82 	    my_win.x_nlines+1, 0);
     83 	scrollok(his_win.x_win, FALSE);
     84 	wclear(his_win.x_win);
     85 
     86 	line_win = newwin(1, COLS, my_win.x_nlines, 0);
     87 	box(line_win, '-', '-');
     88 	wrefresh(line_win);
     89 	/* let them know we are working on it */
     90 	current_state = "No connection yet";
     91 }
     92 
     93 /*
     94  * Trade edit characters with the other talk. By agreement
     95  * the first three characters each talk transmits after
     96  * connection are the three edit characters.
     97  */
     98 set_edit_chars()
     99 {
    100 	char buf[3];
    101 	int cc;
    102 	struct termios tty;
    103 
    104 	tcgetattr(0, &tty);
    105 	my_win.cerase = tty.c_cc[VERASE];
    106 	my_win.kill = tty.c_cc[VKILL];
    107 	if (tty.c_cc[VWERASE] == (unsigned char) -1)
    108 		my_win.werase = '\027';	 /* control W */
    109 	else
    110 		my_win.werase = tty.c_cc[VWERASE];
    111 	buf[0] = my_win.cerase;
    112 	buf[1] = my_win.kill;
    113 	buf[2] = my_win.werase;
    114 	cc = write(sockt, buf, sizeof(buf));
    115 	if (cc != sizeof(buf) )
    116 		p_error("Lost the connection");
    117 	cc = read(sockt, buf, sizeof(buf));
    118 	if (cc != sizeof(buf) )
    119 		p_error("Lost the connection");
    120 	his_win.cerase = buf[0];
    121 	his_win.kill = buf[1];
    122 	his_win.werase = buf[2];
    123 }
    124 
    125 void
    126 sig_sent()
    127 {
    128 
    129 	message("Connection closing. Exiting");
    130 	quit();
    131 }
    132 
    133 /*
    134  * All done talking...hang up the phone and reset terminal thingy's
    135  */
    136 quit()
    137 {
    138 
    139 	if (curses_initialized) {
    140 		wmove(his_win.x_win, his_win.x_nlines-1, 0);
    141 		wclrtoeol(his_win.x_win);
    142 		wrefresh(his_win.x_win);
    143 		endwin();
    144 	}
    145 	if (invitation_waiting)
    146 		send_delete();
    147 	exit(0);
    148 }
    149