talk/init_disp.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)init_disp.c 5.3 (Berkeley) 6/29/88";
#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);
}