diff options
Diffstat (limited to 'usr.bin/talk/init_disp.c')
| -rw-r--r-- | usr.bin/talk/init_disp.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/usr.bin/talk/init_disp.c b/usr.bin/talk/init_disp.c new file mode 100644 index 0000000..47556c9 --- /dev/null +++ b/usr.bin/talk/init_disp.c @@ -0,0 +1,233 @@ +/* + * Copyright (c) 1983, 1993 + * The 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. + * 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. + */ + +#include <sys/cdefs.h> + +__FBSDID("$FreeBSD$"); + +#ifndef lint +static const char sccsid[] = "@(#)init_disp.c 8.2 (Berkeley) 2/16/94"; +#endif + +/* + * Initialization code for the display package, + * as well as the signal handling routines. + */ + +#include <sys/stat.h> + +#include <err.h> +#include <signal.h> +#include <stdlib.h> +#include <unistd.h> +#include <termios.h> + +#include "talk.h" + +/* + * Make sure the callee can write to the screen + */ +void +check_writeable(void) +{ + char *tty; + struct stat sb; + + if ((tty = ttyname(STDERR_FILENO)) == NULL) + err(1, "ttyname"); + if (stat(tty, &sb) < 0) + err(1, "%s", tty); + if (!(sb.st_mode & S_IWGRP)) + errx(1, "The callee cannot write to this terminal, use \"mesg y\"."); +} + +/* + * Set up curses, catch the appropriate signals, + * and build the various windows. + */ +void +init_display(void) +{ + struct sigaction sa; + + if (initscr() == NULL) + errx(1, "Terminal type unset or lacking necessary features."); + (void) sigaction(SIGTSTP, (struct sigaction *)0, &sa); + sigaddset(&sa.sa_mask, SIGALRM); + (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); + curses_initialized = 1; + clear(); + refresh(); + noecho(); + crmode(); + signal(SIGINT, sig_sent); + signal(SIGPIPE, sig_sent); + signal(SIGWINCH, sig_winch); + /* 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); + idlok(my_win.x_win, TRUE); + scrollok(my_win.x_win, TRUE); + 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); + idlok(my_win.x_win, TRUE); + scrollok(his_win.x_win, TRUE); + wclear(his_win.x_win); + + line_win = newwin(1, COLS, my_win.x_nlines, 0); +#if defined(hline) || defined(whline) || defined(NCURSES_VERSION) + whline(line_win, 0, COLS); +#else + box(line_win, '-', '-'); +#endif + 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. + */ +void +set_edit_chars(void) +{ + char buf[3]; + int cc; + struct termios tio; + + tcgetattr(0, &tio); + my_win.cerase = tio.c_cc[VERASE]; + my_win.kill = tio.c_cc[VKILL]; + my_win.werase = tio.c_cc[VWERASE]; + if (my_win.cerase == (char)_POSIX_VDISABLE) + my_win.kill = CERASE; + if (my_win.kill == (char)_POSIX_VDISABLE) + my_win.kill = CKILL; + if (my_win.werase == (char)_POSIX_VDISABLE) + my_win.werase = CWERASE; + 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]; +} + +/* ARGSUSED */ +void +sig_sent(int signo __unused) +{ + + message("Connection closing. Exiting"); + quit(); +} + +void +sig_winch(int dummy __unused) +{ + + gotwinch = 1; +} + +/* + * All done talking...hang up the phone and reset terminal thingy's + */ +void +quit(void) +{ + + 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); +} + +/* + * If we get SIGWINCH, recompute both window sizes and refresh things. + */ +void +resize_display(void) +{ + struct winsize ws; + + if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0 || + (ws.ws_row == LINES && ws.ws_col == COLS)) + return; + + /* Update curses' internal state with new window size. */ + resizeterm(ws.ws_row, ws.ws_col); + + /* + * Resize each window but wait to refresh the screen until + * everything has been drawn so the cursor is in the right spot. + */ + my_win.x_nlines = LINES / 2; + my_win.x_ncols = COLS; + wresize(my_win.x_win, my_win.x_nlines, my_win.x_ncols); + mvwin(my_win.x_win, 0, 0); + clearok(my_win.x_win, TRUE); + + his_win.x_nlines = LINES / 2 - 1; + his_win.x_ncols = COLS; + wresize(his_win.x_win, his_win.x_nlines, his_win.x_ncols); + mvwin(his_win.x_win, my_win.x_nlines + 1, 0); + clearok(his_win.x_win, TRUE); + + wresize(line_win, 1, COLS); + mvwin(line_win, my_win.x_nlines, 0); +#if defined(NCURSES_VERSION) || defined(whline) + whline(line_win, '-', COLS); +#else + wmove(line_win, my_win.x_nlines, 0); + box(line_win, '-', '-'); +#endif + + /* Now redraw the screen. */ + wrefresh(his_win.x_win); + wrefresh(line_win); + wrefresh(my_win.x_win); +} |
