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/* $OpenBSD: io.c,v 1.20 2016/02/18 21:51:20 espie Exp $ */
/* $NetBSD: io.c,v 1.4 1994/12/09 02:14:20 jtc Exp $ */
/*
* 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.
* 3. 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.
*/
/*
* This file contains the I/O handling and the exchange of
* edit characters. This connection itself is established in
* ctl.c
*/
#include <sys/ioctl.h>
#include <errno.h>
#include <poll.h>
#include <unistd.h>
#include "talk.h"
#define A_LONG_TIME 1000000
volatile sig_atomic_t gotwinch;
/*
* The routine to do the actual talking
*/
void
talk(void)
{
struct pollfd fds[2];
char buf[BUFSIZ];
int nb;
#if defined(NCURSES_VERSION) || defined(beep)
message("Connection established");
beep();
beep();
beep();
#else
message("Connection established\007\007\007");
#endif
current_line = 0;
/*
* Wait on both the other process (sockt_mask) and
* standard input ( STDIN_MASK )
*/
fds[0].fd = fileno(stdin);
fds[0].events = POLLIN;
fds[1].fd = sockt;
fds[1].events = POLLIN;
for (;;) {
nb = poll(fds, 2, A_LONG_TIME * 1000);
if (gotwinch) {
resize_display();
gotwinch = 0;
}
if (nb <= 0) {
if (errno == EINTR)
continue;
/* panic, we don't know what happened */
quit("Unexpected error from poll", 1);
}
if (fds[1].revents & POLLIN) {
/* There is data on sockt */
nb = read(sockt, buf, sizeof buf);
if (nb <= 0)
quit("Connection closed. Exiting", 0);
display(&his_win, buf, nb);
}
if (fds[0].revents & POLLIN) {
/*
* We can't make the tty non_blocking, because
* curses's output routines would screw up
*/
ioctl(0, FIONREAD, &nb);
nb = read(STDIN_FILENO, buf, nb);
display(&my_win, buf, nb);
/* might lose data here because sockt is non-blocking */
write(sockt, buf, nb);
}
}
}
/*
* Display string in the standard location
*/
void
message(char *string)
{
wmove(my_win.x_win, current_line % my_win.x_nlines, 0);
wprintw(my_win.x_win, "[%s]", string);
wclrtoeol(my_win.x_win);
current_line++;
wmove(my_win.x_win, current_line % my_win.x_nlines, 0);
wrefresh(my_win.x_win);
}
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