140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/* $NetBSD: io.c,v 1.14 2011/09/06 18:32:03 joerg 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)io.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
__RCSID("$NetBSD: io.c,v 1.14 2011/09/06 18:32:03 joerg Exp $");
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* This file contains the I/O handling and the exchange of
|
|
* edit characters. This connection itself is established in
|
|
* ctl.c
|
|
*/
|
|
|
|
#include "talk.h"
|
|
#include <sys/ioctl.h>
|
|
#include <sys/time.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <poll.h>
|
|
|
|
#define A_LONG_TIME 1000000
|
|
|
|
/*
|
|
* The routine to do the actual talking
|
|
*/
|
|
void
|
|
talk(void)
|
|
{
|
|
struct pollfd set[2];
|
|
int nb;
|
|
char buf[BUFSIZ];
|
|
|
|
message("Connection established\007\007\007");
|
|
current_line = 0;
|
|
|
|
/*
|
|
* Wait on both the other process (sockt_mask) and
|
|
* standard input ( STDIN_MASK )
|
|
*/
|
|
set[0].fd = sockt;
|
|
set[0].events = POLLIN;
|
|
set[1].fd = fileno(stdin);
|
|
set[1].events = POLLIN;
|
|
for (;;) {
|
|
nb = poll(set, 2, A_LONG_TIME * 1000);
|
|
if (nb <= 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
/* panic, we don't know what happened */
|
|
p_error("Unexpected error from poll");
|
|
quit();
|
|
}
|
|
if (set[0].revents & POLLIN) {
|
|
/* There is data on sockt */
|
|
nb = read(sockt, buf, sizeof buf);
|
|
if (nb <= 0) {
|
|
message("Connection closed. Exiting");
|
|
quit();
|
|
}
|
|
display(&his_win, buf, nb);
|
|
}
|
|
if (set[1].revents & POLLIN) {
|
|
/*
|
|
* We can't make the tty non_blocking, because
|
|
* curses's output routines would screw up
|
|
*/
|
|
ioctl(0, FIONREAD, (void *) &nb);
|
|
nb = read(0, buf, nb);
|
|
display(&my_win, buf, nb);
|
|
/* might lose data here because sockt is non-blocking */
|
|
if (nb > 0)
|
|
write(sockt, buf, nb);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* p_error prints the system error message on the standard location
|
|
* on the screen and then exits. (i.e. a curses version of perror)
|
|
*/
|
|
void
|
|
p_error(const char *string)
|
|
{
|
|
wmove(my_win.x_win, current_line%my_win.x_nlines, 0);
|
|
wprintw(my_win.x_win, "[%s : %s (%d)]\n",
|
|
string, strerror(errno), errno);
|
|
wrefresh(my_win.x_win);
|
|
move(LINES-1, 0);
|
|
refresh();
|
|
quit();
|
|
}
|
|
|
|
/*
|
|
* Display string in the standard location
|
|
*/
|
|
void
|
|
message(const 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);
|
|
}
|