177 lines
4.7 KiB
C
177 lines
4.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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#ifndef lint
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static const char sccsid[] = "@(#)io.c 8.1 (Berkeley) 6/6/93";
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#endif
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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/filio.h>
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#include <errno.h>
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#include <signal.h>
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#include <netdb.h>
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#include <poll.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define _XOPEN_SOURCE_EXTENDED
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#include <curses.h>
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#include "talk.h"
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#include "talk_ctl.h"
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extern void display(xwin_t *, wchar_t *);
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volatile sig_atomic_t gotwinch = 0;
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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 hostent *hp, *hp2;
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struct pollfd fds[2];
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int nb;
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wchar_t buf[BUFSIZ];
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char **addr, *his_machine_name;
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FILE *sockfp;
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his_machine_name = NULL;
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hp = gethostbyaddr((const char *)&his_machine_addr.s_addr,
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sizeof(his_machine_addr.s_addr), AF_INET);
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if (hp != NULL) {
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hp2 = gethostbyname(hp->h_name);
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if (hp2 != NULL && hp2->h_addrtype == AF_INET &&
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hp2->h_length == sizeof(his_machine_addr))
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for (addr = hp2->h_addr_list; *addr != NULL; addr++)
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if (memcmp(*addr, &his_machine_addr,
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sizeof(his_machine_addr)) == 0) {
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his_machine_name = strdup(hp->h_name);
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break;
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}
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}
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if (his_machine_name == NULL)
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his_machine_name = strdup(inet_ntoa(his_machine_addr));
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snprintf((char *)buf, sizeof(buf), "Connection established with %s@%s.",
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msg.r_name, his_machine_name);
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free(his_machine_name);
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message((char *)buf);
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write(STDOUT_FILENO, "\007\007\007", 3);
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current_line = 0;
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if ((sockfp = fdopen(sockt, "w+")) == NULL)
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p_error("fdopen");
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setvbuf(sockfp, NULL, _IONBF, 0);
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setvbuf(stdin, NULL, _IONBF, 0);
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/*
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* Wait on both the other process (sockt) and standard input.
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*/
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for (;;) {
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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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nb = poll(fds, 2, INFTIM);
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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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p_error("Unexpected error from poll");
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quit();
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}
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if (fds[1].revents & POLLIN) {
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wint_t w;
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/* There is data on sockt. */
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w = fgetwc(sockfp);
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if (w == WEOF) {
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message("Connection closed. Exiting");
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quit();
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}
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display(&his_win, &w);
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}
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if (fds[0].revents & POLLIN) {
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wint_t w;
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if ((w = getwchar()) != WEOF) {
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display(&my_win, &w);
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(void )fputwc(w, sockfp);
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(void )fflush(sockfp);
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}
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}
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}
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}
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/*
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* p_error prints the system error message on the standard location
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* on the screen and then exits. (i.e. a curses version of perror)
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*/
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void
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p_error(const char *string)
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{
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wmove(my_win.x_win, current_line, 0);
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wprintw(my_win.x_win, "[%s : %s (%d)]\n",
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string, strerror(errno), errno);
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wrefresh(my_win.x_win);
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move(LINES-1, 0);
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refresh();
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quit();
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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(const char *string)
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{
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wmove(my_win.x_win, current_line, 0);
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wprintw(my_win.x_win, "[%s]\n", string);
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if (current_line < my_win.x_nlines - 1)
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current_line++;
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wrefresh(my_win.x_win);
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}
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