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
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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34 static const char sccsid[] = "@(#)io.c 8.1 (Berkeley) 6/6/93";
38 * This file contains the I/O handling and the exchange of
39 * edit characters. This connection itself is established in
43 #include <sys/filio.h>
53 #define _XOPEN_SOURCE_EXTENDED
59 extern void display(xwin_t *, wchar_t *);
61 volatile sig_atomic_t gotwinch = 0;
64 * The routine to do the actual talking
69 struct hostent *hp, *hp2;
73 char **addr, *his_machine_name;
76 his_machine_name = NULL;
77 hp = gethostbyaddr((const char *)&his_machine_addr.s_addr,
78 sizeof(his_machine_addr.s_addr), AF_INET);
80 hp2 = gethostbyname(hp->h_name);
81 if (hp2 != NULL && hp2->h_addrtype == AF_INET &&
82 hp2->h_length == sizeof(his_machine_addr))
83 for (addr = hp2->h_addr_list; *addr != NULL; addr++)
84 if (memcmp(*addr, &his_machine_addr,
85 sizeof(his_machine_addr)) == 0) {
86 his_machine_name = strdup(hp->h_name);
90 if (his_machine_name == NULL)
91 his_machine_name = strdup(inet_ntoa(his_machine_addr));
92 snprintf((char *)buf, sizeof(buf), "Connection established with %s@%s.",
93 msg.r_name, his_machine_name);
94 free(his_machine_name);
96 write(STDOUT_FILENO, "\007\007\007", 3);
100 if ((sockfp = fdopen(sockt, "w+")) == NULL)
103 setvbuf(sockfp, NULL, _IONBF, 0);
104 setvbuf(stdin, NULL, _IONBF, 0);
107 * Wait on both the other process (sockt) and standard input.
110 fds[0].fd = fileno(stdin);
111 fds[0].events = POLLIN;
113 fds[1].events = POLLIN;
114 nb = poll(fds, 2, INFTIM);
122 /* Panic, we don't know what happened. */
123 p_error("Unexpected error from poll");
126 if (fds[1].revents & POLLIN) {
129 /* There is data on sockt. */
132 message("Connection closed. Exiting");
135 display(&his_win, &w);
137 if (fds[0].revents & POLLIN) {
140 if ((w = getwchar()) != WEOF) {
141 display(&my_win, &w);
142 (void )fputwc(w, sockfp);
143 (void )fflush(sockfp);
150 * p_error prints the system error message on the standard location
151 * on the screen and then exits. (i.e. a curses version of perror)
154 p_error(const char *string)
156 wmove(my_win.x_win, current_line, 0);
157 wprintw(my_win.x_win, "[%s : %s (%d)]\n",
158 string, strerror(errno), errno);
159 wrefresh(my_win.x_win);
166 * Display string in the standard location
169 message(const char *string)
171 wmove(my_win.x_win, current_line, 0);
172 wprintw(my_win.x_win, "[%s]\n", string);
173 if (current_line < my_win.x_nlines - 1)
175 wrefresh(my_win.x_win);