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/*
* Copyright (c) 1983 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*/
/*
* From: @(#)io.c 5.6 (Berkeley) 3/1/91
*/
char io_rcsid[] =
"$Id: io.c,v 1.10 1997/06/08 20:13:51 dholland Exp $";
/*
* This file contains the I/O handling and the exchange of
* edit characters. This connection itself is established in
* ctl.c
*/
#include <sys/time.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "talk.h"
/*
* The routine to do the actual talking
*/
void
talk(void)
{
fd_set read_set;
int nb;
unsigned char buf[BUFSIZ];
message("Connection established");
beep();
wrefresh(curscr);
current_line = 0;
/*
* Wait on both the other process and standard input
*/
for (;;) {
FD_ZERO(&read_set);
FD_SET(0, &read_set);
FD_SET(sockt, &read_set);
nb = select(sockt+1, &read_set, NULL, NULL, NULL);
if (nb <= 0) {
if (errno == EINTR) {
continue;
}
/* panic, we don't know what happened */
p_error("Unexpected error from select");
quit(0);
}
if (FD_ISSET(sockt, &read_set)) {
/* There is data on sockt */
nb = read(sockt, buf, sizeof(buf));
if (nb <= 0) {
message("Connection closed. Exiting");
quit(0);
}
display(&his_win, buf, nb);
}
if (FD_ISSET(0, &read_set)) {
buf[0] = getch();
nb = 1;
display(&my_win, buf, nb);
/* might lose data here because sockt is nonblocking */
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)
{
const char *rmcup, *smcup, *amsg="";
rmcup = tigetstr("rmcup");
smcup = tigetstr("smcup");
if (rmcup || smcup) {
amsg = ". Press any key...";
}
wmove(my_win.x_win, current_line%my_win.x_nlines, 0);
wprintw(my_win.x_win, "[%s : %s (%d)%s]\n",
string, strerror(errno), errno, amsg);
wrefresh(my_win.x_win);
move(LINES-1, 0);
refresh();
if (rmcup || smcup) {
/* alternative screen, prompt before exit */
getch();
}
quit(0);
}
/*
* 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]\n", string);
wrefresh(my_win.x_win);
}
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