386BSD 0.1 development

[unix-history] / usr / src / usr.bin / talk / init_disp.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)init_disp.c 5.4 (Berkeley) 6/1/90";
#endif /* not lint */

/*
* Initialization code for the display package,
* as well as the signal handling routines.
*/

#include "talk.h"
#include <signal.h>

/* 
* Set up curses, catch the appropriate signals,
* and build the various windows.
*/
init_display()
{
       void sig_sent();
       struct sigvec sigv;

       initscr();
       (void) sigvec(SIGTSTP, (struct sigvec *)0, &sigv);
       sigv.sv_mask |= sigmask(SIGALRM);
       (void) sigvec(SIGTSTP, &sigv, (struct sigvec *)0);
       curses_initialized = 1;
       clear();
       refresh();
       noecho();
       crmode();
       signal(SIGINT, sig_sent);
       signal(SIGPIPE, sig_sent);
       /* curses takes care of ^Z */
       my_win.x_nlines = LINES / 2;
       my_win.x_ncols = COLS;
       my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
       scrollok(my_win.x_win, FALSE);
       wclear(my_win.x_win);

       his_win.x_nlines = LINES / 2 - 1;
       his_win.x_ncols = COLS;
       his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
           my_win.x_nlines+1, 0);
       scrollok(his_win.x_win, FALSE);
       wclear(his_win.x_win);

       line_win = newwin(1, COLS, my_win.x_nlines, 0);
       box(line_win, '-', '-');
       wrefresh(line_win);
       /* let them know we are working on it */
       current_state = "No connection yet";
}

/*
* Trade edit characters with the other talk. By agreement
* the first three characters each talk transmits after
* connection are the three edit characters.
*/
set_edit_chars()
{
       char buf[3];
       int cc;
       struct sgttyb tty;
       struct ltchars ltc;
       
       ioctl(0, TIOCGETP, &tty);
       ioctl(0, TIOCGLTC, (struct sgttyb *)&ltc);
       my_win.cerase = tty.sg_erase;
       my_win.kill = tty.sg_kill;
       if (ltc.t_werasc == (char) -1)
               my_win.werase = '\027';  /* control W */
       else
               my_win.werase = ltc.t_werasc;
       buf[0] = my_win.cerase;
       buf[1] = my_win.kill;
       buf[2] = my_win.werase;
       cc = write(sockt, buf, sizeof(buf));
       if (cc != sizeof(buf) )
               p_error("Lost the connection");
       cc = read(sockt, buf, sizeof(buf));
       if (cc != sizeof(buf) )
               p_error("Lost the connection");
       his_win.cerase = buf[0];
       his_win.kill = buf[1];
       his_win.werase = buf[2];
}

void
sig_sent()
{

       message("Connection closing. Exiting");
       quit();
}

/*
* All done talking...hang up the phone and reset terminal thingy's
*/
quit()
{

       if (curses_initialized) {
               wmove(his_win.x_win, his_win.x_nlines-1, 0);
               wclrtoeol(his_win.x_win);
               wrefresh(his_win.x_win);
               endwin();
       }
       if (invitation_waiting)
               send_delete();
       exit(0);
}