1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
23 /* All Rights Reserved */
24
25
26 #ident "%Z%%M% %I% %E% SMI"
27
28 #ifndef DIAL
29 static char SCCSID[] = "@(#)dkminor.c 2.3+BNU DKHOST 86/12/02";
30 #endif
31 /*
32 * COMMKIT(TM) Software - Datakit(R) VCS Interface Release 2.0 V1
33 */
34 /*
35 Return minor device number for a given Datakit device.
36 The channel number is used since using the minor device returned
37 by fstat gives wrong results for duplex systems.
38 */
39
40 #include "dk.h"
41 GLOBAL
dkminor(fd)42 dkminor(fd)
43 {
44 struct diocreq iocb;
45
46
47 if (ioctl(fd, DIOCINFO, &iocb) < 0)
48 return(-1);
49 return(iocb.req_chmin); /* req_chmin contains channel number */
50 }
51