2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 static const char sccsid[] = "@(#)io.c 8.1 (Berkeley) 6/6/93";
41 * This file contains the I/O handling and the exchange of
42 * edit characters. This connection itself is established in
46 #include <sys/filio.h>
56 #define _XOPEN_SOURCE_EXTENDED
62 extern void display(xwin_t *, wchar_t *);
64 volatile sig_atomic_t gotwinch = 0;
67 * The routine to do the actual talking
72 struct hostent *hp, *hp2;
76 char **addr, *his_machine_name;
79 his_machine_name = NULL;
80 hp = gethostbyaddr((const char *)&his_machine_addr.s_addr,
81 sizeof(his_machine_addr.s_addr), AF_INET);
83 hp2 = gethostbyname(hp->h_name);
84 if (hp2 != NULL && hp2->h_addrtype == AF_INET &&
85 hp2->h_length == sizeof(his_machine_addr))
86 for (addr = hp2->h_addr_list; *addr != NULL; addr++)
87 if (memcmp(*addr, &his_machine_addr,
88 sizeof(his_machine_addr)) == 0) {
89 his_machine_name = strdup(hp->h_name);
93 if (his_machine_name == NULL)
94 his_machine_name = strdup(inet_ntoa(his_machine_addr));
95 snprintf((char *)buf, sizeof(buf), "Connection established with %s@%s.",
96 msg.r_name, his_machine_name);
97 free(his_machine_name);
99 write(STDOUT_FILENO, "\007\007\007", 3);
103 if ((sockfp = fdopen(sockt, "w+")) == NULL)
106 setvbuf(sockfp, NULL, _IONBF, 0);
107 setvbuf(stdin, NULL, _IONBF, 0);
110 * Wait on both the other process (sockt) and standard input.
113 fds[0].fd = fileno(stdin);
114 fds[0].events = POLLIN;
116 fds[1].events = POLLIN;
117 nb = poll(fds, 2, INFTIM);
125 /* Panic, we don't know what happened. */
126 p_error("Unexpected error from poll");
129 if (fds[1].revents & POLLIN) {
132 /* There is data on sockt. */
135 message("Connection closed. Exiting");
138 display(&his_win, &w);
140 if (fds[0].revents & POLLIN) {
143 if ((w = getwchar()) != WEOF) {
144 display(&my_win, &w);
145 (void )fputwc(w, sockfp);
146 (void )fflush(sockfp);
153 * p_error prints the system error message on the standard location
154 * on the screen and then exits. (i.e. a curses version of perror)
157 p_error(const char *string)
159 wmove(my_win.x_win, current_line, 0);
160 wprintw(my_win.x_win, "[%s : %s (%d)]\n",
161 string, strerror(errno), errno);
162 wrefresh(my_win.x_win);
169 * Display string in the standard location
172 message(const char *string)
174 wmove(my_win.x_win, current_line, 0);
175 wprintw(my_win.x_win, "[%s]\n", string);
176 if (current_line < my_win.x_nlines - 1)
178 wrefresh(my_win.x_win);