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/*
Copyright (C) 1995-2025 Free Software Foundation, Inc.
This file is part of GNU Inetutils.
GNU Inetutils is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Inetutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see `http://www.gnu.org/licenses/'. */
/*
* 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 <config.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_FILIO_H
# include <sys/filio.h>
#endif
#include <sys/time.h>
#include <time.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/select.h>
#include "talk.h"
#define A_LONG_TIME 10000000
/*
* The routine to do the actual talking
*/
int
talk (void)
{
fd_set read_template, read_set;
int stdin_fd = fileno (stdin);
int i, nb, num_fds;
char buf[BUFSIZ];
struct timeval wait;
message ("Connection established");
beep ();
current_line = 0;
/*
* Wait on both the other process (SOCKET) and stdin.
*/
FD_ZERO (&read_template);
FD_SET (sockt, &read_template);
FD_SET (stdin_fd, &read_template);
num_fds = (stdin_fd > sockt ? stdin_fd : sockt) + 1;
for (;;)
{
read_set = read_template;
wait.tv_sec = A_LONG_TIME;
wait.tv_usec = 0;
nb = select (num_fds, &read_set, 0, 0, &wait);
if (nb <= 0)
{
if (errno == EINTR)
{
read_set = read_template;
continue;
}
/* panic, we don't know what happened */
p_error ("Unexpected error from select");
quit ();
}
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 ();
}
display (&his_win, buf, nb);
}
if (FD_ISSET (stdin_fd, &read_set))
{
/*
* We can't make the tty non_blocking, because
* curses's output routines would screw up
*/
ioctl (0, FIONREAD, (struct sgttyb *) &nb);
for (i = 0; i < nb; i++)
buf[i] = getch ();
display (&my_win, buf, nb);
/* might lose data here because sockt is non-blocking */
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.
*/
int
p_error (char *string)
{
if (curses_initialized)
{
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 ();
}
else
perror (string);
quit ();
return 0;
}
/*
* Display string in the standard location.
*/
int
message (char *string)
{
if (curses_initialized)
{
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);
}
else if (string && string[0])
printf ("[%s]\n", string);
return 0;
}
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