xref: /freebsd/usr.bin/tip/libacu/dn11.c (revision 0f3bdf5df978c1d74d4b5e0429ced9613debcc3c)
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 #ifndef lint
38 #if 0
39 static char sccsid[] = "@(#)dn11.c	8.1 (Berkeley) 6/6/93";
40 #endif
41 static char rcsid[] = "$OpenBSD: dn11.c,v 1.5 2001/11/19 19:02:16 mpech Exp $";
42 #endif /* not lint */
43 
44 /*
45  * Routines for dialing up on DN-11
46  */
47 #include "tip.h"
48 
49 void dn_abort();
50 void alarmtr();
51 static jmp_buf jmpbuf;
52 static int child = -1, dn;
53 
54 int
55 dn_dialer(num, acu)
56 	char *num, *acu;
57 {
58 	int lt, nw;
59 	int timelim;
60 	struct termios cntrl;
61 
62 	if (boolean(value(VERBOSE)))
63 		printf("\nstarting call...");
64 	if ((dn = open(acu, 1)) < 0) {
65 		if (errno == EBUSY)
66 			printf("line busy...");
67 		else
68 			printf("acu open error...");
69 		return (0);
70 	}
71 	if (setjmp(jmpbuf)) {
72 		kill(child, SIGKILL);
73 		close(dn);
74 		return (0);
75 	}
76 	signal(SIGALRM, alarmtr);
77 	timelim = 5 * strlen(num);
78 	alarm(timelim < 30 ? 30 : timelim);
79 	if ((child = fork()) == 0) {
80 		/*
81 		 * ignore this stuff for aborts
82 		 */
83 		signal(SIGALRM, SIG_IGN);
84 		signal(SIGINT, SIG_IGN);
85 		signal(SIGQUIT, SIG_IGN);
86 		sleep(2);
87 		nw = write(dn, num, lt = strlen(num));
88 		exit(nw != lt);
89 	}
90 	/*
91 	 * open line - will return on carrier
92 	 */
93 	if ((FD = open(DV, 2)) < 0) {
94 		if (errno == EIO)
95 			printf("lost carrier...");
96 		else
97 			printf("dialup line open failed...");
98 		alarm(0);
99 		kill(child, SIGKILL);
100 		close(dn);
101 		return (0);
102 	}
103 	alarm(0);
104 	tcgetattr(dn, &cntrl);
105 	cntrl.c_cflag |= HUPCL;
106 	tcsetattr(dn, TCSANOW, &cntrl);
107 	signal(SIGALRM, SIG_DFL);
108 	while ((nw = wait(&lt)) != child && nw != -1)
109 		;
110 	fflush(stdout);
111 	close(dn);
112 	if (lt != 0) {
113 		close(FD);
114 		return (0);
115 	}
116 	return (1);
117 }
118 
119 void
120 alarmtr()
121 {
122 	alarm(0);
123 	longjmp(jmpbuf, 1);
124 }
125 
126 /*
127  * Insurance, for some reason we don't seem to be
128  *  hanging up...
129  */
130 void
131 dn_disconnect()
132 {
133 
134 	sleep(2);
135 	if (FD > 0)
136 		ioctl(FD, TIOCCDTR, 0);
137 	close(FD);
138 }
139 
140 void
141 dn_abort()
142 {
143 
144 	sleep(2);
145 	if (child > 0)
146 		kill(child, SIGKILL);
147 	if (dn > 0)
148 		close(dn);
149 	if (FD > 0)
150 		ioctl(FD, TIOCCDTR, 0);
151 	close(FD);
152 }
153