181 lines
4.9 KiB
C
181 lines
4.9 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94";
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#endif
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static const char rcsid[] =
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"$Id$";
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#endif /* not lint */
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/*
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* Initialization code for the display package,
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* as well as the signal handling routines.
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*/
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#include <err.h>
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#include <signal.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "talk.h"
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/*
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* Make sure the callee can write to the screen
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*/
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void
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check_writeable()
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{
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char *tty;
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struct stat sb;
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if ((tty = ttyname(STDERR_FILENO)) == NULL)
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err(1, "ttyname");
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if (stat(tty, &sb) < 0)
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err(1, "%s", tty);
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if (!(sb.st_mode & S_IWGRP))
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errx(1, "The callee cannot write to this terminal, use \"mesg y\".");
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}
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/*
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* Set up curses, catch the appropriate signals,
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* and build the various windows.
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*/
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void
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init_display()
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{
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struct sigaction sa;
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if (initscr() == NULL)
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errx(1, "Terminal type unset or lacking necessary features.");
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(void) sigaction(SIGTSTP, (struct sigaction *)0, &sa);
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sigaddset(&sa.sa_mask, SIGALRM);
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(void) sigaction(SIGTSTP, &sa, (struct sigaction *)0);
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curses_initialized = 1;
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clear();
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refresh();
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noecho();
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crmode();
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signal(SIGINT, sig_sent);
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signal(SIGPIPE, sig_sent);
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/* curses takes care of ^Z */
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my_win.x_nlines = LINES / 2;
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my_win.x_ncols = COLS;
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my_win.x_win = newwin(my_win.x_nlines, my_win.x_ncols, 0, 0);
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idlok(my_win.x_win, TRUE);
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scrollok(my_win.x_win, TRUE);
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wclear(my_win.x_win);
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his_win.x_nlines = LINES / 2 - 1;
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his_win.x_ncols = COLS;
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his_win.x_win = newwin(his_win.x_nlines, his_win.x_ncols,
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my_win.x_nlines+1, 0);
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idlok(my_win.x_win, TRUE);
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scrollok(his_win.x_win, TRUE);
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wclear(his_win.x_win);
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line_win = newwin(1, COLS, my_win.x_nlines, 0);
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#if defined(hline) || defined(whline) || defined(NCURSES_VERSION)
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whline(line_win, 0, COLS);
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#else
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box(line_win, '-', '-');
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#endif
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wrefresh(line_win);
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/* let them know we are working on it */
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current_state = "No connection yet";
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}
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/*
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* Trade edit characters with the other talk. By agreement
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* the first three characters each talk transmits after
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* connection are the three edit characters.
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*/
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void
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set_edit_chars()
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{
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char buf[3];
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int cc;
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struct termios tio;
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tcgetattr(0, &tio);
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my_win.cerase = tio.c_cc[VERASE];
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my_win.kill = tio.c_cc[VKILL];
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my_win.werase = tio.c_cc[VWERASE];
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if (my_win.cerase == (char)_POSIX_VDISABLE)
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my_win.kill = CERASE;
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if (my_win.kill == (char)_POSIX_VDISABLE)
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my_win.kill = CKILL;
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if (my_win.werase == (char)_POSIX_VDISABLE)
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my_win.werase = CWERASE;
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buf[0] = my_win.cerase;
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buf[1] = my_win.kill;
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buf[2] = my_win.werase;
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cc = write(sockt, buf, sizeof(buf));
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if (cc != sizeof(buf) )
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p_error("Lost the connection");
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cc = read(sockt, buf, sizeof(buf));
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if (cc != sizeof(buf) )
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p_error("Lost the connection");
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his_win.cerase = buf[0];
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his_win.kill = buf[1];
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his_win.werase = buf[2];
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}
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/* ARGSUSED */
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void
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sig_sent(signo)
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int signo;
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{
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message("Connection closing. Exiting");
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quit();
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}
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/*
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* All done talking...hang up the phone and reset terminal thingy's
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*/
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void
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quit()
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{
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if (curses_initialized) {
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wmove(his_win.x_win, his_win.x_nlines-1, 0);
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wclrtoeol(his_win.x_win);
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wrefresh(his_win.x_win);
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endwin();
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}
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if (invitation_waiting)
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send_delete();
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exit(0);
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}
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