1/*	$NetBSD: dn11.c,v 1.9 2006/04/03 00:51:14 perry 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#ifndef lint
34#if 0
35static char sccsid[] = "@(#)dn11.c	8.1 (Berkeley) 6/6/93";
36#endif
37__RCSID("$NetBSD: dn11.c,v 1.9 2006/04/03 00:51:14 perry Exp $");
38#endif /* not lint */
39
40/*
41 * Routines for dialing up on DN-11
42 */
43#include "tip.h"
44
45static jmp_buf jmpbuf;
46static int child = -1, dn;
47
48static	void	alarmtr(int);
49
50int
51dn_dialer(char *num, char *acu)
52{
53	int lt, nw;
54	int timelim;
55	struct termios cntrl;
56
57	if (boolean(value(VERBOSE)))
58		(void)printf("\nstarting call...");
59	if ((dn = open(acu, O_WRONLY)) < 0) {
60		if (errno == EBUSY)
61			(void)printf("line busy...");
62		else
63			(void)printf("acu open error...");
64		return (0);
65	}
66	if (setjmp(jmpbuf)) {
67		(void)kill(child, SIGKILL);
68		(void)close(dn);
69		return (0);
70	}
71	(void)signal(SIGALRM, alarmtr);
72	timelim = 5 * strlen(num);
73	(void)alarm((unsigned)(timelim < 30 ? 30 : timelim));
74	if ((child = fork()) == 0) {
75		/*
76		 * ignore this stuff for aborts
77		 */
78		(void)signal(SIGALRM, SIG_IGN);
79		(void)signal(SIGINT, SIG_IGN);
80		(void)signal(SIGQUIT, SIG_IGN);
81		(void)sleep(2);
82		nw = write(dn, num, (size_t)(lt = strlen(num)));
83		exit(nw != lt);
84	}
85	/*
86	 * open line - will return on carrier
87	 */
88	if ((FD = open(DV, O_RDWR)) < 0) {
89		if (errno == EIO)
90			(void)printf("lost carrier...");
91		else
92			(void)printf("dialup line open failed...");
93		(void)alarm(0);
94		(void)kill(child, SIGKILL);
95		(void)close(dn);
96		return (0);
97	}
98	(void)alarm(0);
99	(void)tcgetattr(dn, &cntrl);
100	cntrl.c_cflag |= HUPCL;
101	(void)tcsetattr(dn, TCSANOW, &cntrl);
102	(void)signal(SIGALRM, SIG_DFL);
103	while ((nw = wait(&lt)) != child && nw != -1)
104		;
105	(void)fflush(stdout);
106	(void)close(dn);
107	if (lt != 0) {
108		(void)close(FD);
109		return (0);
110	}
111	return (1);
112}
113
114static void
115/*ARGSUSED*/
116alarmtr(int dummy __unused)
117{
118
119	(void)alarm(0);
120	longjmp(jmpbuf, 1);
121}
122
123/*
124 * Insurance, for some reason we don't seem to be
125 *  hanging up...
126 */
127void
128dn_disconnect(void)
129{
130
131	(void)sleep(2);
132	if (FD > 0)
133		(void)ioctl(FD, TIOCCDTR, 0);
134	(void)close(FD);
135}
136
137void
138dn_abort(void)
139{
140
141	(void)sleep(2);
142	if (child > 0)
143		(void)kill(child, SIGKILL);
144	if (dn > 0)
145		(void)close(dn);
146	if (FD > 0)
147		(void)ioctl(FD, TIOCCDTR, 0);
148	(void)close(FD);
149}
150