xref: /freebsd/usr.bin/tip/libacu/dn11.c (revision d391708c06767d32228e4a76539b7c214714d5a8)
1 /*	$OpenBSD: dn11.c,v 1.9 2006/03/17 19:17:13 moritz 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. Neither the name of the University nor the names of its contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  */
32 
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)dn11.c	8.1 (Berkeley) 6/6/93";
36 #endif
37 static const char rcsid[] = "$OpenBSD: dn11.c,v 1.9 2006/03/17 19:17:13 moritz Exp $";
38 #endif /* not lint */
39 
40 /*
41  * Routines for dialing up on DN-11
42  */
43 #include "tip.h"
44 
45 static jmp_buf jmpbuf;
46 static pid_t child = -1, dn;
47 
48 static void alarmtr(int);
49 
50 int
51 dn_dialer(char *num, char *acu)
52 {
53 	int lt, nw;
54 	int timelim;
55 	struct termios cntrl;
56 
57 	if (boolean(value(VERBOSE)))
58 		printf("\nstarting call...");
59 	if ((dn = open(acu, 1)) < 0) {
60 		if (errno == EBUSY)
61 			printf("line busy...");
62 		else
63 			printf("acu open error...");
64 		return (0);
65 	}
66 	if (setjmp(jmpbuf)) {
67 		kill(child, SIGKILL);
68 		close(dn);
69 		return (0);
70 	}
71 	signal(SIGALRM, alarmtr);
72 	timelim = 5 * strlen(num);
73 	alarm(timelim < 30 ? 30 : timelim);
74 	if ((child = fork()) == 0) {
75 		/*
76 		 * ignore this stuff for aborts
77 		 */
78 		signal(SIGALRM, SIG_IGN);
79 		signal(SIGINT, SIG_IGN);
80 		signal(SIGQUIT, SIG_IGN);
81 		sleep(2);
82 		nw = write(dn, num, lt = strlen(num));
83 		exit(nw != lt);
84 	}
85 	/*
86 	 * open line - will return on carrier
87 	 */
88 	if ((FD = open(DV, 2)) < 0) {
89 		if (errno == EIO)
90 			printf("lost carrier...");
91 		else
92 			printf("dialup line open failed...");
93 		alarm(0);
94 		kill(child, SIGKILL);
95 		close(dn);
96 		return (0);
97 	}
98 	alarm(0);
99 	tcgetattr(dn, &cntrl);
100 	cntrl.c_cflag |= HUPCL;
101 	tcsetattr(dn, TCSANOW, &cntrl);
102 	signal(SIGALRM, SIG_DFL);
103 	while ((nw = wait(&lt)) != child && nw != -1)
104 		;
105 	fflush(stdout);
106 	close(dn);
107 	if (lt != 0) {
108 		close(FD);
109 		return (0);
110 	}
111 	return (1);
112 }
113 
114 /*ARGSUSED*/
115 static void
116 alarmtr(int signo)
117 {
118 	alarm(0);
119 	longjmp(jmpbuf, 1);
120 }
121 
122 /*
123  * Insurance, for some reason we don't seem to be
124  *  hanging up...
125  */
126 void
127 dn_disconnect(void)
128 {
129 	sleep(2);
130 	if (FD > 0)
131 		ioctl(FD, TIOCCDTR, 0);
132 	close(FD);
133 }
134 
135 void
136 dn_abort(void)
137 {
138 	sleep(2);
139 	if (child > 0)
140 		kill(child, SIGKILL);
141 	if (dn > 0)
142 		close(dn);
143 	if (FD > 0)
144 		ioctl(FD, TIOCCDTR, 0);
145 	close(FD);
146 }
147