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