872b698bd4
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
236 lines
6.0 KiB
C
236 lines
6.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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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. 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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static const char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94";
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#endif
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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 <sys/stat.h>
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#include <err.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <termios.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(void)
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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(void)
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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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signal(SIGWINCH, sig_winch);
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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(void)
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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(int signo __unused)
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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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void
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sig_winch(int dummy __unused)
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{
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gotwinch = 1;
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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(void)
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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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/*
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* If we get SIGWINCH, recompute both window sizes and refresh things.
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*/
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void
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resize_display(void)
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{
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struct winsize ws;
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0 ||
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(ws.ws_row == LINES && ws.ws_col == COLS))
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return;
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/* Update curses' internal state with new window size. */
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resizeterm(ws.ws_row, ws.ws_col);
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/*
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* Resize each window but wait to refresh the screen until
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* everything has been drawn so the cursor is in the right spot.
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*/
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my_win.x_nlines = LINES / 2;
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my_win.x_ncols = COLS;
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wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols);
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mvwin(my_win.x_win, 0, 0);
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clearok(my_win.x_win, TRUE);
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his_win.x_nlines = LINES / 2 - 1;
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his_win.x_ncols = COLS;
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wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols);
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mvwin(his_win.x_win, my_win.x_nlines + 1, 0);
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clearok(his_win.x_win, TRUE);
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wresize(line_win, 1, COLS);
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mvwin(line_win, my_win.x_nlines, 0);
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#if defined(NCURSES_VERSION) || defined(whline)
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whline(line_win, '-', COLS);
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#else
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wmove(line_win, my_win.x_nlines, 0);
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box(line_win, '-', '-');
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#endif
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/* Now redraw the screen. */
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wrefresh(his_win.x_win);
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wrefresh(line_win);
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wrefresh(my_win.x_win);
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}
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