xref: /freebsd/usr.bin/tip/libacu/dn11.c (revision 65785b55c199c7f94d1607b9e8ea0bf0d5c26949)
1 /*	$OpenBSD: dn11.c,v 1.5 2001/11/19 19:02:16 mpech Exp $	*/
2 /*	$NetBSD: dn11.c,v 1.4 1995/10/29 00:49:53 pk Exp $	*/
3 
4 /*
5  * Copyright (c) 1983, 1993
6  *	The Regents of the University of California.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *	This product includes software developed by the University of
19  *	California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39 
40 #ifndef lint
41 #if 0
42 static char sccsid[] = "@(#)dn11.c	8.1 (Berkeley) 6/6/93";
43 static char rcsid[] = "$OpenBSD: dn11.c,v 1.5 2001/11/19 19:02:16 mpech Exp $";
44 #endif
45 #endif /* not lint */
46 
47 /*
48  * Routines for dialing up on DN-11
49  */
50 #include "tip.h"
51 
52 void dn_abort();
53 void alarmtr();
54 static jmp_buf jmpbuf;
55 static int child = -1, dn;
56 
57 int
58 dn_dialer(num, acu)
59 	char *num, *acu;
60 {
61 	int lt, nw;
62 	int timelim;
63 	struct termios cntrl;
64 
65 	if (boolean(value(VERBOSE)))
66 		printf("\nstarting call...");
67 	if ((dn = open(acu, 1)) < 0) {
68 		if (errno == EBUSY)
69 			printf("line busy...");
70 		else
71 			printf("acu open error...");
72 		return (0);
73 	}
74 	if (setjmp(jmpbuf)) {
75 		kill(child, SIGKILL);
76 		close(dn);
77 		return (0);
78 	}
79 	signal(SIGALRM, alarmtr);
80 	timelim = 5 * strlen(num);
81 	alarm(timelim < 30 ? 30 : timelim);
82 	if ((child = fork()) == 0) {
83 		/*
84 		 * ignore this stuff for aborts
85 		 */
86 		signal(SIGALRM, SIG_IGN);
87 		signal(SIGINT, SIG_IGN);
88 		signal(SIGQUIT, SIG_IGN);
89 		sleep(2);
90 		nw = write(dn, num, lt = strlen(num));
91 		exit(nw != lt);
92 	}
93 	/*
94 	 * open line - will return on carrier
95 	 */
96 	if ((FD = open(DV, 2)) < 0) {
97 		if (errno == EIO)
98 			printf("lost carrier...");
99 		else
100 			printf("dialup line open failed...");
101 		alarm(0);
102 		kill(child, SIGKILL);
103 		close(dn);
104 		return (0);
105 	}
106 	alarm(0);
107 	tcgetattr(dn, &cntrl);
108 	cntrl.c_cflag |= HUPCL;
109 	tcsetattr(dn, TCSANOW, &cntrl);
110 	signal(SIGALRM, SIG_DFL);
111 	while ((nw = wait(&lt)) != child && nw != -1)
112 		;
113 	fflush(stdout);
114 	close(dn);
115 	if (lt != 0) {
116 		close(FD);
117 		return (0);
118 	}
119 	return (1);
120 }
121 
122 void
123 alarmtr()
124 {
125 	alarm(0);
126 	longjmp(jmpbuf, 1);
127 }
128 
129 /*
130  * Insurance, for some reason we don't seem to be
131  *  hanging up...
132  */
133 void
134 dn_disconnect()
135 {
136 
137 	sleep(2);
138 	if (FD > 0)
139 		ioctl(FD, TIOCCDTR, 0);
140 	close(FD);
141 }
142 
143 void
144 dn_abort()
145 {
146 
147 	sleep(2);
148 	if (child > 0)
149 		kill(child, SIGKILL);
150 	if (dn > 0)
151 		close(dn);
152 	if (FD > 0)
153 		ioctl(FD, TIOCCDTR, 0);
154 	close(FD);
155 }
156