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