1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 1998 Doug Rabson 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD$ 30.\" 31.Dd September 10, 2010 32.Dt DEVCLASS_GET_MAXUNIT 9 33.Os 34.Sh NAME 35.Nm devclass_get_maxunit 36.Nd find the maximum unit number in the class 37.Sh SYNOPSIS 38.In sys/param.h 39.In sys/bus.h 40.Ft int 41.Fn devclass_get_maxunit "devclass_t dc" 42.Sh DESCRIPTION 43Returns the next unit number to be allocated to device instances in the 44.Dv devclass . 45This is one greater than the highest currently allocated unit. 46.Sh RETURN VALUES 47The 48.Fn devclass_get_maxunit 49function returns -1 if 50.Fa dc 51is 52.Dv NULL; 53otherwise it returns the next unit 54number in 55.Fa dc's 56devclass. 57.Sh ERRORS 58None. 59.Sh SEE ALSO 60.Xr devclass 9 , 61.Xr device 9 62.Sh AUTHORS 63This manual page was written by 64.An Doug Rabson . 65.Sh BUGS 66The name is confusing since it is one greater than the maximum unit. 67