[dragonfly.git] / usr.bin / talk / io.c

/*
 * 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.
 *
 * @(#)io.c	8.1 (Berkeley) 6/6/93
 * $FreeBSD: src/usr.bin/talk/io.c,v 1.9.2.2 2001/10/15 13:42:07 dd Exp $
 */

/*
 * This file contains the I/O handling and the exchange of
 * edit characters. This connection itself is established in
 * ctl.c
 */

#include <errno.h>
#include <netdb.h>
#include <stdlib.h>
#include <string.h>
#include <sys/filio.h>
#include "talk.h"
#include "talk_ctl.h"

#define A_LONG_TIME 10000000

/*
 * The routine to do the actual talking
 */
void
talk(void)
{
	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(&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 (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, (struct sgttyb *) &nb);
			nb = read(0, 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(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(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);
}
Commit	Line	Data
984263bc MD	1	/*
	2	* Copyright (c) 1983, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	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. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
1de703da MD	32	*
	33	* @(#)io.c 8.1 (Berkeley) 6/6/93
	34	* $FreeBSD: src/usr.bin/talk/io.c,v 1.9.2.2 2001/10/15 13:42:07 dd Exp $
984263bc MD	35	*/
984263bc MD	36
984263bc MD	37	/*
	38	* This file contains the I/O handling and the exchange of
	39	* edit characters. This connection itself is established in
	40	* ctl.c
	41	*/
	42
	43	#include <errno.h>
	44	#include <netdb.h>
	45	#include <stdlib.h>
	46	#include <string.h>
	47	#include <sys/filio.h>
	48	#include "talk.h"
	49	#include "talk_ctl.h"
	50
	51	#define A_LONG_TIME 10000000
	52
	53	/*
	54	* The routine to do the actual talking
	55	*/
	56	void
1d1731fa	57	talk(void)
984263bc MD	58	{
	59	struct hostent hp, hp2;
	60	int nb;
	61	fd_set read_set, read_template;
	62	char buf[BUFSIZ], *addr, his_machine_name;
	63	struct timeval wait;
	64
	65	his_machine_name = NULL;
15b85273	66	hp = gethostbyaddr(&his_machine_addr.s_addr,
984263bc MD	67	sizeof(his_machine_addr.s_addr), AF_INET);
	68	if (hp != NULL) {
	69	hp2 = gethostbyname(hp->h_name);
	70	if (hp2 != NULL && hp2->h_addrtype == AF_INET &&
	71	hp2->h_length == sizeof(his_machine_addr))
	72	for (addr = hp2->h_addr_list; *addr != NULL; addr++)
	73	if (memcmp(*addr, &his_machine_addr,
	74	sizeof(his_machine_addr)) == 0) {
	75	his_machine_name = strdup(hp->h_name);
	76	break;
	77	}
	78	}
	79	if (his_machine_name == NULL)
	80	his_machine_name = strdup(inet_ntoa(his_machine_addr));
	81	snprintf(buf, sizeof(buf), "Connection established with %s@%s.",
	82	msg.r_name, his_machine_name);
	83	free(his_machine_name);
	84	message(buf);
	85	write(STDOUT_FILENO, "\007\007\007", 3);
	86
	87	current_line = 0;
	88
	89	/*
	90	* Wait on both the other process (sockt_mask) and
	91	* standard input ( STDIN_MASK )
	92	*/
	93	FD_ZERO(&read_template);
	94	FD_SET(sockt, &read_template);
	95	FD_SET(fileno(stdin), &read_template);
	96	for (;;) {
	97	read_set = read_template;
	98	wait.tv_sec = A_LONG_TIME;
	99	wait.tv_usec = 0;
	100	nb = select(32, &read_set, 0, 0, &wait);
	101	if (nb <= 0) {
	102	if (errno == EINTR) {
	103	read_set = read_template;
	104	continue;
	105	}
	106	/* panic, we don't know what happened */
	107	p_error("Unexpected error from select");
	108	quit();
	109	}
	110	if (FD_ISSET(sockt, &read_set)) {
	111	/* There is data on sockt */
	112	nb = read(sockt, buf, sizeof buf);
	113	if (nb <= 0) {
	114	message("Connection closed. Exiting");
	115	quit();
	116	}
	117	display(&his_win, buf, nb);
	118	}
	119	if (FD_ISSET(fileno(stdin), &read_set)) {
	120	/*
	121	* We can't make the tty non_blocking, because
	122	* curses's output routines would screw up
	123	*/
	124	int i;
	125	ioctl(0, FIONREAD, (struct sgttyb *) &nb);
	126	nb = read(0, buf, nb);
	127	display(&my_win, buf, nb);
	128	/* might lose data here because sockt is non-blocking */
	129	for (i = 0; i < nb; ++i)
	130	if (buf[i] == '\r')
131	buf[i] = '\n';
132	write(sockt, buf, nb);
133	}
134	}
135	}
136
137	/*
138	* p_error prints the system error message on the standard location
139	* on the screen and then exits. (i.e. a curses version of perror)
140	*/
141	void
e2daa382	142	p_error(const char *string)
984263bc MD	143	{
	144	wmove(my_win.x_win, current_line, 0);
	145	wprintw(my_win.x_win, "[%s : %s (%d)]\n",
	146	string, strerror(errno), errno);
	147	wrefresh(my_win.x_win);
	148	move(LINES-1, 0);
	149	refresh();
	150	quit();
	151	}
	152
	153	/*
	154	* Display string in the standard location
	155	*/
	156	void
e2daa382	157	message(const char *string)
984263bc MD	158	{
	159	wmove(my_win.x_win, current_line, 0);
	160	wprintw(my_win.x_win, "[%s]\n", string);
	161	if (current_line < my_win.x_nlines - 1)
	162	current_line++;
	163	wrefresh(my_win.x_win);
	164	}