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/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef lint
static const char sccsid[] = "@(#)io.c 8.1 (Berkeley) 6/6/93";
#endif
/*
* This file contains the I/O handling and the exchange of
* edit characters. This connection itself is established in
* ctl.c
*/
#include <sys/filio.h>
#include <errno.h>
#include <signal.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "talk.h"
#include "talk_ctl.h"
#define A_LONG_TIME 10000000
volatile sig_atomic_t gotwinch = 0;
/*
* The routine to do the actual talking
*/
void
talk()
{
struct hostent *hp, *hp2;
int nb;
fd_set read_set, read_template;
char buf[BUFSIZ], **addr, *his_machine_name;
struct timeval wait;
his_machine_name = NULL;
hp = gethostbyaddr((const char *)&his_machine_addr.s_addr,
sizeof(his_machine_addr.s_addr), AF_INET);
if (hp != NULL) {
hp2 = gethostbyname(hp->h_name);
if (hp2 != NULL && hp2->h_addrtype == AF_INET &&
hp2->h_length == sizeof(his_machine_addr))
for (addr = hp2->h_addr_list; *addr != NULL; addr++)
if (memcmp(*addr, &his_machine_addr,
sizeof(his_machine_addr)) == 0) {
his_machine_name = strdup(hp->h_name);
break;
}
}
if (his_machine_name == NULL)
his_machine_name = strdup(inet_ntoa(his_machine_addr));
snprintf(buf, sizeof(buf), "Connection established with %s@%s.",
msg.r_name, his_machine_name);
free(his_machine_name);
message(buf);
write(STDOUT_FILENO, "\007\007\007", 3);
current_line = 0;
/*
* Wait on both the other process (sockt_mask) and
* standard input ( STDIN_MASK )
*/
FD_ZERO(&read_template);
FD_SET(sockt, &read_template);
FD_SET(fileno(stdin), &read_template);
for (;;) {
read_set = read_template;
wait.tv_sec = A_LONG_TIME;
wait.tv_usec = 0;
nb = select(32, &read_set, 0, 0, &wait);
if (gotwinch) {
resize_display();
gotwinch = 0;
}
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(fileno(stdin), &read_set)) {
/*
* We can't make the tty non_blocking, because
* curses's output routines would screw up
*/
int i;
ioctl(0, FIONREAD, (void *) &nb);
if (nb > sizeof buf)
nb = sizeof buf;
nb = read(STDIN_FILENO, buf, nb);
display(&my_win, buf, nb);
/* might lose data here because sockt is non-blocking */
for (i = 0; i < nb; ++i)
if (buf[i] == '\r')
buf[i] = '\n';
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)
*/
void
p_error(string)
const char *string;
{
wmove(my_win.x_win, current_line, 0);
wprintw(my_win.x_win, "[%s : %s (%d)]\n",
string, strerror(errno), errno);
wrefresh(my_win.x_win);
move(LINES-1, 0);
refresh();
quit();
}
/*
* Display string in the standard location
*/
void
message(string)
const char *string;
{
wmove(my_win.x_win, current_line, 0);
wprintw(my_win.x_win, "[%s]\n", string);
if (current_line < my_win.x_nlines - 1)
current_line++;
wrefresh(my_win.x_win);
}
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