usr.bin/talk/init_disp.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1994 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * init_disp contains the initialization code for the display package,
 * as well as the signal handling routines
 */

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

#ifdef SYSV
#define signal(s, f)    sigset(s, f)
#endif /* SYSV */

static void sig_sent();

/*
 * set up curses, catch the appropriate signals, and build the
 * various windows
 */

void
init_display()
{
    initscr();
    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);

    rem_win.x_nlines = LINES / 2 - 1;
    rem_win.x_ncols = COLS;
    rem_win.x_win = newwin(rem_win.x_nlines, rem_win.x_ncols,
                        my_win.x_nlines+1, 0);
    scrollok(rem_win.x_win, FALSE);
    wclear(rem_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 = gettext("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
     */

void
set_edit_chars()
{
    char buf[3];
    int cc;
#ifdef SYSV
    struct termios tty;
    ioctl(0, TCGETS, (struct termios *)&tty);

    buf[0] = my_win.cerase = tty.c_cc[VERASE];
                    /* for SVID should be VERSE */
    buf[1] = my_win.kill = tty.c_cc[VKILL];
    buf[2] = my_win.werase = tty.c_cc[VWERASE];
                    /* for SVID should be VWERSE */
#else /* ! SYSV */
    struct sgttyb tty;
    struct ltchars ltc;

    gtty(0, &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;
#endif /* SYSV */

    cc = write(sockt, buf, sizeof (buf));

    if (cc != sizeof (buf)) {
        p_error(gettext("Lost the connection"));
    }

    cc = read(sockt, buf, sizeof (buf));

    if (cc != sizeof (buf)) {
        p_error(gettext("Lost the connection"));
    }

    rem_win.cerase = buf[0];
    rem_win.kill = buf[1];
    rem_win.werase = buf[2];
}

static void
sig_sent()
{
    message(gettext("Connection closing. Exiting"));
    quit();
}

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

void
quit()
{
    if (curses_initialized) {
        wmove(rem_win.x_win, rem_win.x_nlines-1, 0);
        wclrtoeol(rem_win.x_win);
        wrefresh(rem_win.x_win);
        endwin();
    }

    if (invitation_waiting) {
        send_delete();
    }

    exit(0);
}