67 lines
2.1 KiB
Groff
67 lines
2.1 KiB
Groff
.\" -*- nroff -*-
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.\"
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.\" Copyright (c) 1998 Doug Rabson
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.\"
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.\" All rights reserved.
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.\"
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.\" This program is free software.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd September 10, 2010
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.Dt DEVCLASS_GET_MAXUNIT 9
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.Os
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.Sh NAME
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.Nm devclass_get_maxunit
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.Nd find the maximum unit number in the class
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/bus.h
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.Ft int
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.Fn devclass_get_maxunit "devclass_t dc"
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.Sh DESCRIPTION
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Returns the next unit number to be allocated to device instances in the
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.Dv devclass .
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This is one greater than the highest currently allocated unit.
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.Sh RETURN VALUES
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The
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.Fn devclass_get_maxunit
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function returns -1 if
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.Fa dc
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is
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.Dv NULL ,
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otherwise it returns the next unit
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number in
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.Fa dc's
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devclass.
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.Sh ERRORS
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None.
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.Sh SEE ALSO
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.Xr devclass 9 ,
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.Xr device 9
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.Sh AUTHORS
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This manual page was written by
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.An Doug Rabson .
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.Sh BUGS
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The name is confusing since it is one greater than the maximum unit.
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