1/*	$NetBSD: tipout.c,v 1.14 2006/12/14 17:09:43 christos Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
18 *
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
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#include <poll.h>
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)tipout.c	8.1 (Berkeley) 6/6/93";
37#endif
38__RCSID("$NetBSD: tipout.c,v 1.14 2006/12/14 17:09:43 christos Exp $");
39#endif /* not lint */
40
41#include "tip.h"
42/*
43 * tip
44 *
45 * lower fork of tip -- handles passive side
46 *  reading from the remote host
47 */
48
49void	intEMT(void);
50void	intIOT(void);
51void	intSYS(void);
52__dead static void	intTERM(int);
53
54/*
55 * TIPOUT wait state routine --
56 *   sent by TIPIN when it wants to posses the remote host
57 */
58void
59intIOT(void)
60{
61
62	(void)write(repdes[1],&ccc,1);	/* We got the message */
63	(void)read(fildes[0], &ccc,1);	/* Now wait for coprocess */
64}
65
66/*
67 * Scripting command interpreter --
68 *  accepts script file name over the pipe and acts accordingly
69 */
70void
71intEMT(void)
72{
73	char c, line[256];
74	char *pline = line;
75	char reply;
76
77	(void)read(fildes[0], &c, 1);		/* We got the message */
78	while (c != '\n' && line + sizeof line - pline > 0) {
79		*pline++ = c;
80		(void)read(fildes[0], &c, 1);
81	}
82	*pline = '\0';
83	if (boolean(value(SCRIPT)) && fscript != NULL)
84		(void)fclose(fscript);
85	if (pline == line) {
86		setboolean(value(SCRIPT), FALSE);
87		reply = 'y';
88	} else {
89		if ((fscript = fopen(line, "a")) == NULL)
90			reply = 'n';
91		else {
92			reply = 'y';
93			setboolean(value(SCRIPT), TRUE);
94		}
95	}
96	(void)write(repdes[1], &reply, 1);	/* Now coprocess waits for us */
97}
98
99static void
100/*ARGSUSED*/
101intTERM(int dummy __unused)
102{
103
104	if (boolean(value(SCRIPT)) && fscript != NULL)
105		(void)fclose(fscript);
106	exit(0);
107}
108
109void
110intSYS(void)
111{
112
113	setboolean(value(BEAUTIFY), !boolean(value(BEAUTIFY)));
114}
115
116/*
117 * ****TIPOUT   TIPOUT****
118 */
119void
120tipout(void)
121{
122	char buf[BUFSIZ];
123	char *cp;
124	int cnt;
125	int omask;
126	struct pollfd pfd[2];
127
128	(void)signal(SIGINT, SIG_IGN);
129	(void)signal(SIGQUIT, SIG_IGN);
130	(void)signal(SIGHUP, intTERM);	/* for dial-ups */
131	(void)signal(SIGTERM, intTERM);	/* time to go signal*/
132
133	pfd[0].fd = attndes[0];
134	pfd[0].events = POLLIN;
135	pfd[1].fd = FD;
136	pfd[1].events = POLLIN|POLLHUP;
137
138	for (omask = 0;; (void)sigsetmask(omask)) {
139
140	if (poll(pfd, 2, -1) > 0) {
141
142	if (pfd[0].revents & POLLIN)
143		if (read(attndes[0], &ccc, 1) > 0) {
144			switch(ccc) {
145			case 'W':
146				intIOT();	/* TIPIN wants us to wait */
147				break;
148			case 'S':
149				intEMT();	/* TIPIN wants us to script */
150				break;
151			case 'B':
152				intSYS();	/* "Beautify" value toggle */
153				break;
154			default:
155				break;
156			}
157		}
158	}
159
160	if (pfd[1].revents & (POLLIN|POLLHUP)) {
161			cnt = read(FD, buf, BUFSIZ);
162			if (cnt <= 0) {
163				/* lost carrier || EOF */
164				if ((cnt < 0 && errno == EIO) || (cnt == 0)) {
165					(void)sigblock(sigmask(SIGTERM));
166					intTERM(0);
167					/*NOTREACHED*/
168				}
169				continue;
170			}
171			omask = sigblock(SIGTERM);
172			for (cp = buf; cp < buf + cnt; cp++)
173				*cp &= STRIP_PAR;
174			(void)write(1, buf, (size_t)cnt);
175			if (boolean(value(SCRIPT)) && fscript != NULL) {
176				if (!boolean(value(BEAUTIFY))) {
177					(void)fwrite(buf, 1, (size_t)cnt, fscript);
178					continue;
179				}
180				for (cp = buf; cp < buf + cnt; cp++)
181					if ((*cp >= ' ' && *cp <= '~') ||
182					    any(*cp, value(EXCEPTIONS)))
183						(void)putc(*cp, fscript);
184			}
185		}
186	}
187}
188