126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/* $OpenBSD: io.c,v 1.20 2016/02/18 21:51:20 espie Exp $ */
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/* $NetBSD: io.c,v 1.4 1994/12/09 02:14:20 jtc Exp $ */
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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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/*
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* This file contains the I/O handling and the exchange of
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* edit characters. This connection itself is established in
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* ctl.c
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*/
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#include <sys/ioctl.h>
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#include <errno.h>
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#include <poll.h>
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#include <unistd.h>
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#include "talk.h"
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#define A_LONG_TIME 1000000
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volatile sig_atomic_t gotwinch;
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/*
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* The routine to do the actual talking
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*/
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void
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talk(void)
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{
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struct pollfd fds[2];
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char buf[BUFSIZ];
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int nb;
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#if defined(NCURSES_VERSION) || defined(beep)
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message("Connection established");
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beep();
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beep();
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beep();
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#else
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message("Connection established\007\007\007");
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#endif
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current_line = 0;
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/*
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* Wait on both the other process (sockt_mask) and
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* standard input ( STDIN_MASK )
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*/
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fds[0].fd = fileno(stdin);
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fds[0].events = POLLIN;
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fds[1].fd = sockt;
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fds[1].events = POLLIN;
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for (;;) {
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nb = poll(fds, 2, A_LONG_TIME * 1000);
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if (gotwinch) {
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resize_display();
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gotwinch = 0;
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}
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if (nb <= 0) {
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if (errno == EINTR)
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continue;
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/* panic, we don't know what happened */
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quit("Unexpected error from poll", 1);
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}
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if (fds[1].revents & POLLIN) {
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/* There is data on sockt */
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nb = read(sockt, buf, sizeof buf);
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if (nb <= 0)
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quit("Connection closed. Exiting", 0);
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display(&his_win, buf, nb);
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}
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if (fds[0].revents & POLLIN) {
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/*
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* We can't make the tty non_blocking, because
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* curses's output routines would screw up
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*/
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ioctl(0, FIONREAD, &nb);
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nb = read(STDIN_FILENO, buf, nb);
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display(&my_win, buf, nb);
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/* might lose data here because sockt is non-blocking */
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write(sockt, buf, nb);
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}
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}
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}
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/*
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* Display string in the standard location
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*/
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void
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message(char *string)
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{
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wmove(my_win.x_win, current_line % my_win.x_nlines, 0);
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wprintw(my_win.x_win, "[%s]", string);
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wclrtoeol(my_win.x_win);
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current_line++;
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wmove(my_win.x_win, current_line % my_win.x_nlines, 0);
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wrefresh(my_win.x_win);
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}
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