xref: /illumos-gate/usr/src/cmd/bnu/dkminor.c (revision 7c478bd9)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23*7c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
24*7c478bd9Sstevel@tonic-gate 
25*7c478bd9Sstevel@tonic-gate 
26*7c478bd9Sstevel@tonic-gate #ident	"%Z%%M%	%I%	%E% SMI"
27*7c478bd9Sstevel@tonic-gate 
28*7c478bd9Sstevel@tonic-gate #ifndef DIAL
29*7c478bd9Sstevel@tonic-gate 	static char	SCCSID[] = "@(#)dkminor.c	2.3+BNU DKHOST 86/12/02";
30*7c478bd9Sstevel@tonic-gate #endif
31*7c478bd9Sstevel@tonic-gate /*
32*7c478bd9Sstevel@tonic-gate  *	COMMKIT(TM) Software - Datakit(R) VCS Interface Release 2.0 V1
33*7c478bd9Sstevel@tonic-gate  */
34*7c478bd9Sstevel@tonic-gate /*
35*7c478bd9Sstevel@tonic-gate    Return minor device number for a given Datakit device.
36*7c478bd9Sstevel@tonic-gate    The channel number is used since using the minor device returned
37*7c478bd9Sstevel@tonic-gate    by fstat gives wrong results for duplex systems.
38*7c478bd9Sstevel@tonic-gate */
39*7c478bd9Sstevel@tonic-gate 
40*7c478bd9Sstevel@tonic-gate #include "dk.h"
41*7c478bd9Sstevel@tonic-gate GLOBAL
dkminor(fd)42*7c478bd9Sstevel@tonic-gate dkminor(fd)
43*7c478bd9Sstevel@tonic-gate {
44*7c478bd9Sstevel@tonic-gate 	struct diocreq iocb;
45*7c478bd9Sstevel@tonic-gate 
46*7c478bd9Sstevel@tonic-gate 
47*7c478bd9Sstevel@tonic-gate 	if (ioctl(fd, DIOCINFO, &iocb) < 0)
48*7c478bd9Sstevel@tonic-gate 		return(-1);
49*7c478bd9Sstevel@tonic-gate 	return(iocb.req_chmin); /* req_chmin contains channel number */
50*7c478bd9Sstevel@tonic-gate }
51